Letteratura scientifica selezionata sul tema "Wounds and injuries"
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Articoli di riviste sul tema "Wounds and injuries"
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Vasil’ev, A. Yu, e I. S. Obelchak. "Multidetector computed tomography in the diagnosis of lesions of the main vessels for gunshot injury of the chest". Regional blood circulation and microcirculation 18, n. 1 (3 maggio 2019): 31–38. http://dx.doi.org/10.24884/1682-6655-2019-18-1-31-38.
Testo completoAbstract (sommario):
Purpose – examine the possibilities of multislice computed tomangiography (MSCTA) in case of suspected damage to the great vessels in a chest gunshot fghting injury.Material and methods. A radiation survey of 130 wounded with gunshot injuries of the chest to assess the nature, diagnosis of gunshot injuries of the vascular bed.Results. Of the 130 wounded with gunshot wounds to the chest, 41 (31.5 %) of the injured had gunshot wounds to the chest were nonpenetrating, and 89 (68.5 %) had penetrating injuries. In 76 (58.4 %) patients with gunshot chest injuries, the nature of the wound was fragmentation, in 54 (41.6 %), wounds were bullet wounds. In the algorithm of radiation examination of patients with gunshot wounds of the chest to identify the nature of damage to the organs of the mediastinum and vascular structures, the main method of visualization was MSCT with contrast enhancement. Damage to the bone skeleton of the chest (ribs, collarbone, sternum, scapula) by MSCT was observed in 23 (17.6 %) patients. Almost half – 66 (50.1 %) of the wounded with gunshot injuries during MSCT examination, traumatic injury (pulmonitis) of the lung was observed. In 2 (1.5 %) cases, damage to the heart was detected that was not recognized at the stage of skilled surgical care. False posttraumatic aneurysm of the thoracic aorta was diagnosed in two wounded. Accuracy, sensitivity, specifcity of MSCT angiography in imaging of the vascular bed and diagnosis of damage to the great vessels of the chest cavity was 98, 97 and 97 %, respectively.Conclusions. MSCT made it possible to reliably assess the nature of the gunshot injuries of the chest, identify timely damage to the great vessels of the mediastinum, determine the localization of the foreign injuring bodies near the vascular structures, and determine the surgical tactics.
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Khoroshun, Eduard M., Volodymyr V. Nehoduiko, Vitaly V. Makarov, Serhiy I. Panasenko, Tamara P. Yakymova e Serhii V. Tertyshnyi. "MACROSCOPIC AND MICROSCOPIC FEATURES OF FIREARM PENETRATING ABDOMINAL INJURIES WITH DAMAGE TO THE APPENDIX". Clinical and Preventive Medicine, n. 6 (19 dicembre 2023): 68–73. http://dx.doi.org/10.31612/2616-4868.6.2023.08.
Testo completoAbstract (sommario):
Introduction. In the structure of combat abdominal trauma during all periods of hostilities (according to ATO/JFO data), gunshot wounds dominated, accounting for 87.1%. An analysis of the distribution of those injured with gunshot wounds by the type of projectile causing the injury showed a prevalence of shrapnel injuries over bullet wounds – more than 80%.
The aim of the research was to analyze the macroscopic and microscopic changes in firearm penetrating abdominal injuries with damage to the appendix.
Materials and Methods. Eight appendectomies were performed due to firearm penetrating abdominal injuries with damage to the appendix. Complaints, medical history, examination data, ultrasound examination according to the FAST protocol, and radiological examinations were studied in all injured patients. To refine the diagnosis and determine the scope of surgical intervention, the WOLF videoendoscopic system was used.
Histological examination of the removed appendices was performed, which were stained with hematoxylin and eosin and with the Van Gieson stain. A complex of pathomorphological studies was conducted using the Primo Star microscope (Carl Zeiss) at a magnification of ×140.
Results. All injuries occurred while wearing a bulletproof vest and were characterized as blind, with 1 (12.5%) being gunshot wounds and 7 (87.5%) being shrapnel wounds. The entrance wound in firearm blind penetrating abdominal injuries with appendix damage was located in the right hypochondriac region – 4 (50%), right flank – 1 (12.5%), right inguinal region – 2 (25%), and mesogastric region – 1 (12.5%) cases. The average size of the entrance wound on the skin was 23.3±0.4×12.4±0.3 cm. All skin wounds were outside the bulletproof vest protection area.
The injuries to the appendix had an average size of 15.4±1.2×9.3±0.1 cm. All removed foreign bodies were larger than 1 cm in their largest dimension.
Conclusions. In most cases of firearm penetrating abdominal injuries, damage to the appendix is noted with an entrance wound predominantly on the right side. Macroscopically, in firearm blind penetrating abdominal injuries with appendix involvement, the wound on the skin is larger than on the appendix. All foreign metal bodies removed from the abdominal cavity after firearm shrapnel blind abdominal injuries with appendix involvement were of large size. Contusional injuries to the appendix tend to undergo destructive transformation, requiring surgical treatment - appendectomy. The increased frequency of appendix injuries can be explained by the widespread use of shrapnel ammunition in abdominal injuries when personal protective equipment does not provide protection for this area.
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Kvasnevskyi, Yevhen, Michailo Kashtalian, Oleh Gerasimenko e Oleksandr Kvasnevskyi. "Experimental Study of Action Different Kinetic Energy on the Colon". Lietuvos chirurgija 21, n. 2 (2 maggio 2022): 105–8. http://dx.doi.org/10.15388/lietchirur.2022.21.61.
Testo completoAbstract (sommario):
The purpose of the study. To increase the effectiveness of surgical care for the wounded with combat trauma of the colon by studying of ballistic, morphological and functional features of the gunshot wounds. Patients and methods. A study of surgical treatment of 83 wounded with combat injuries of the colon, received in the area of anti-terrorist operation in the period from 2014–2018. For comparative analysis of treatment results, two clinical groups were formed: comparison and main. The comparison group included 42 wounded who were treated from April 2014 to February 2015 (the first and second periods of ATO), who used traditional surgical tactics. The main group included 41 wounded who were treated from March 2015 to 2018. Results. Analysis of the distribution of wounded with combat trauma by type of wound / injury revealed that the vast majority of them in both groups had shrapnel wounds – 49 (59.1%). There were 30 (36.1%) victims with bullet wounds, and 4 (4.8%) with closed injuries. The wounded patients with the battle trauma of the thick bowel by type of injury had missile wounds as a rule – 49 (59.1%). There were 30 (36.1%) patients with bullet wounds, and 4 (4.8%) with closed injuries. Most of the injuries were combined – 58 (69.9%), and with only abdominal injuries – 25 (30.1%), mostly multiple – 21 (25.3%). The great majority of the thick bowel injuries belonged to sigmoid – 32 (38.6%) and transverse colon – 21 (25.3%), which is explained by relatively large size of these parts of the intestine. Conclusions. The choice of surgical tactics and scope of surgical interventions on damaged organs and structures took into account the results of experimental study of mechanogenesis and pathomorphology of gunshot wounds of the colon, obtained in bench studies by modeling gunshot wounds on “thoracoabdominal ballistic material”.
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Danchyn, A. O., O. M. Goncharuk, S. A. Usatov, M. S. Altabury e G. O. Danchyn. "Biophysical mechanisms of the formation of wound channels in non-penetrating gunshot craniocerebral wounds". Ukrainian Interventional Neuroradiology and Surgery 35, n. 1 (30 giugno 2021): 33–42. http://dx.doi.org/10.26683/2786-4855-2021-1(35)-33-42.
Testo completoAbstract (sommario):
Objective ‒ to develop recommendations for optimization of primary surgical treatment of gunshot penetrating craniocerebral wounds on the basis of theoretical and applied study of one of the sections of wound ballistics ‒ biophysical mechanisms of wound canal formation, concomitant impenetrable wounds and intracranial injuries.Materials and methods. The medical histories of 155 wounded who received a non-pe-netrating craniocerebral injury during the hostilities in the East of Ukraine in 2014‒2020 were studied. All of the wounded were males between 18 and 60 years old (mean age ‒ 35.1 years). To study the biophysical features of the formation of different types of wound canals at a given non-lethal kinetic energy transferred to the head tissues, the type of the wounding projectile, the flight trajectory, the nature of gunshot injuries to the soft tissues of the cranial vault and skull fractures and intracranial injuries were determined according to the data of clinical stu-dies and computed tomography and compared with the results of theoretical studies using the laws of wound ballistics.Results. There were 11 (7.1 %) bullet (only tangential) wounds, and 144 (92.9 %) shrapnel. The formation of wound channels depends on the type of the wounding projectile and its kinetic energy. Non-penetrating firearms bullet and shrapnel tangential craniocerebral wounds are caused by the destructive effect of injuring shells on the tissues, which at the moment of collision with the head have both destructive kinetic energy (>80 J) and less than destructive kinetic energy. Blind craniocerebral injuries are caused only by the traumatic effects of fragments with a small (<80 J) kinetic energy.Conclusions. With gunshot non-penetrating single shrapnel blind wounds, the wounds do not have a zone of secondary necrosis, and the zone of primary necrosis is small or insignificant, which makes it possible not to carve soft tissues around the wound during primary surgical treatment, but only to remove necrotic tissues. With gunshot non-penetrating shrapnel tangential and blind craniocerebral wounds, when the soft tissue wounds of the cranial vault do not gap, small size (damage to the skin, subcutaneous tissue to aponeurosis), primary surgical treatment is not performed. Such wounds are treated with a toilet and aseptic dressings. Wound canals ending in gunshot fractures are subject to primary surgical treatment in the same way as gunshot fractures.
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Khankhasykov, S. P., D. N. Zhilin e V. V. Tokar. "Gunshot wounds to animals". BIO Web of Conferences 108 (2024): 03011. http://dx.doi.org/10.1051/bioconf/202410803011.
Testo completoAbstract (sommario):
Gunshot injuries are quite common in various animal species. In 40.0% of cases, this type of damage was detected on the corpses of roe deer, in 26.67% of cases, damage was noted on the corpses of Manchurian elk, 13.33% of cases were registered in horses and cattle. In 6.67% of cases, injuries were found on the dog’s corpse. In 40.0% of the cases, the injuries corresponded to blind gunshot wounds and were represented by an entrance gunshot wound and a wound channel. There was no exit wound. In 33.33% of the injuries corresponded to perforating gunshot and were represented by an entrance and exit wound opening and wound canal. 20% of the identified injuries are represented by tangential gunshot wounds, characterized by the presence of an open wound canal. In 6.67% of cases, injuries were attributed to bruised gunshot.
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Bradic, Nikola, Drazen Cuculic e Ervin Jancic. "Terrorism in Croatia". Prehospital and Disaster Medicine 18, n. 2 (giugno 2003): 88–91. http://dx.doi.org/10.1017/s1049023x00000819.
Testo completoAbstract (sommario):
AbstractIntroduction:This report illustrates Croatia's experience with the terrorist attack in the city of Rijeka in October 1995. Also, the intention of this report is to outline how emergency services were functioning in this sudden-onset situation.Methods:The medical documentation of 27 wounded citizens in the attack was analyzed and the appearance of bodily wounds, severity of wounds, and the mechanisms of injury are described. From the forensic medical report, the wounds and damages sustained by the terrorist also were analyzed. All findings were compared with similar cases from around the world.Results:In the 27 wounded citizens, three (11%) had head injuries, and injuries of the abdomen in only two cases (7%) were found. The most common injuries sustained involved one or more extremities: 16 (59%) persons had wounds of an upper or lower extremity or a combination of multiple wounds. The main cause of death of the terrorist was explosive wounds to the chest and abdomen with destruction of multiple inner organs (primarily kidneys, liver, abdomen, and lung). Furthermore, the terrorist had a fracture of the skull base and multiple injuries to the brain.Conclusion:Comparing the findings with other data from the literature, the distribution in the percentages of wounded is almost the same as reported in many bomb attacks. In this case, the walls of the building protected many citizens, which is why so few were seriously injured. Forensic examination of the terrorist's body showed all of the characteristics of blast injuries.
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Loskutov, Aleksandr, Andriy Domanskyi, Ivan Zherdev e Svyatoslav Lushnya. "Features of medical care in patientswith elbow joint gunshot wounds". ORTHOPAEDICS, TRAUMATOLOGY and PROSTHETICS, n. 1 (5 ottobre 2021): 5–8. http://dx.doi.org/10.15674/0030-5987202115-8.
Testo completoAbstract (sommario):
Gunshot wounds of the elbow joint are the third most common after knee and shoulder injuries. Features of the anatomical and functional structure of the elbow joint, the close location of the vascular and nervous formations, favorable conditions for the development of infection determine the severity of gunshot wounds and cause the complexity of its treatment. Objective. To evaluate the frequency and nature of the elbow joint gunshot wounds in the structure of the general combat injuries, as well as to determine the volume of medical care and direction of treatment of such injuries in the conditions of the regional hospital as a stage of care. Methods. A retrospective study included 1 809 patients (96.0 % of men, mean age (33.7 ± 0.2) years). Firearms limb injuries were detected in 1 013 (56.0 %) of all victims, of which the elbow joint — 25 (2.47 %). Mines and explosives injuries were in 22 (88 %) of the patients, bullet — in 3 (12 %). Results. Tactics of treatment of elbow joint gunshot wounds depended on the severity of the condition of the victims and the nature of concomitant traumatic injuries. In the structure of combat injury of the elbow joint the majority was combined (52 %) and multiple (40 %) injuries and was accompanied by gunshot fractures in 60 %. In patients who were in severe state, applied the tactics of Damage control in two stages. At the first stage the fractures were fixed with plaster splints or external fixation devices (EF), the wounds were not subjected to full surgical debridment (SD), but only washed with antiseptics and the visible foreign bodies were removed. In patients with soft tissue injuries wounds the primary SD was performed according to general principles, injured nerves were not restored. In the second stage, after patient is stabilized, the repeated SD of the wound was performed. After their uncomplicated healing the EF was removed and the method of fixation was changed to internal osteosyntesis. Conclusions. It is recommended to perform stabilization of intra-articular gunshot fractures of the elbow joint with EF and after uncomplicated wound healing go to the internal osteosynthesis. Key words. Elbow joint, gunshot wounds, treatment.
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Altabrouri, M. S., e S. A. Usatov. "Morphological Features of Wound Canals and Intracranial Pathology in Non-Penetrating Gunshot Craniocerebral Injuries". TERRA ORTHOPAEDICA, n. 3(118) (20 dicembre 2023): 40–46. http://dx.doi.org/10.37647/2786-7595-2023-118-3-40-46.
Testo completoAbstract (sommario):
Background. Non-penetrating craniocerebral trauma in modern warfare, according to our data, accounts for up to a fifth of all gunshot wounds of the skull and brain in armed conflicts at the end of the last century and the beginning of the current century. It is a complex problem of military field surgery, first of all from the point of view of solving an important task of the medical services of the warring parties – restoring the maximum number of wounded. The study of pathomorphological wound channels in various types of gunshot non-penetrating craniocerebral injuries gives opportunities for the development of adequate options for access during surgical treatment.
Object: to reveal the morphological features of wound canals and internal cranial injuries in gunshot non-penetrating craniocerebral injuries for optimal planning the primary surgical treatment of the wound.
Material and Methods. Study and analysis of morphological features of wound canals and intracranial pathology in 155 non-penetrating gunshot craniocerebral injuries of the military who underwent surgical treatment in the 2nd and 3rd level healthcare institutions during the war in 2014-2020. The morphology of wound canals and intracranial injuries were studied based on the laws of wound ballistics, clinical data, and computed tomography data.
Results. The largest proportion of non-penetrating gunshot wounds is perforated and depressed fractures (39.9%); perforated fractures with penetration of a fragment to the inner plate of the bone account for 20% and incomplete (to the bone) make up 5.8%. Among blind non-penetrating wounds, single ones prevail (65.2%). More often, they have a cylindrical blind canal. Subarachnoid hemorrhage, brain congestion, and very rarely epidural hematoma (one case) are found in almost all perforated bone fractures. A more complex pathomorphological structure is present in multiple non-penetrating gunshot wounds. At the same time, only one fragment causes a depressed skull fracture. Large and small wound canals can be distinguished by width. The latter do not damage the bones and do not require surgical treatment. This type of injury is accompanied by a subarachnoid hemorrhage in 78% of cases and by brain congestion near the fracture in 43% of cases. Tangential injuries occur in 21.9% of injuries; they have a grooved elongated shape. The bottom of these wounds are linear and compressed fractures. Rarely, subdural and intracerebral hematomas are formed in the projection of the fracture. All non-penetrating injuries are accompanied by small brain congestion of the I-II degrees and subarachnoid hemorrhage. Epidural and intracerebral hematomas can rarely occur with blind non-penetrating cranial injuries.
Conclusions. Non-penetrating multiple fragmental injuries are accompanied by the greatest soft tissue damage. In case of blind wound canals, there are incomplete perforated and perforated-depressed skull fractures; linear and depressed fractures occur in tangential canals. Regardless of the type of wound canals in the brain, there are small congestions (hemorrhages) and subarachnoid hemorrhage. In rare cases, epidural and intracerebral hematomas are formed. Subdural hematomas, sometimes combined with intracerebral hematomas, are found in tangential non-penetrating wounds. Projectiles in tangential wounds do not cause molecular shock and do not lead to secondary necrosis, therefore, it is not necessary to cut the edges of the wound during the primary surgical treatment.
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Khomenko, I. P., K. P. Gerzhyk e B. M. Kucher. "The place and role of videothoracoscopic surgical interventions in war wounds and injuries of the chest organs". Reports of Vinnytsia National Medical University 22, n. 3 (28 settembre 2018): 522–24. http://dx.doi.org/10.31393/reports-vnmedical-2018-22(3)-26.
Testo completoAbstract (sommario):
Thoracic injuries are considered to be one of the most severe injuries of human systems and organs, which are characterized by a large number of complications and high mortality. According to the ATO data in eastern Ukraine, the frequency of chest injuries in the general structure of combat surgical injuries is 11.7%, the overwhelming majority of which were non-penetrating injuries (83.6%). The overall mortality rate for penetrating wounds of the breast is 5–10%. Surgical tactics for injuries and injuries of the chest is diverse and depends on the type of traumatic injury, the time of first medical and specialized care, the severity of the condition of the victims, the presence of complications, the technical capabilities of the hospital. Objective: optimization of surgical tactics for wounds and injuries of the chest through the use of video-assisted thoracoscopic techniques. A retrospective analysis of the surgical treatment of 103 thoracic wounded and injured, which were located in the Military Medical Clinical Center of the Southern Region in Odessa and the area of responsibility (level II–IV medical care) from June 2014 to July 2017, was carried out. At the stages of medical evacuation of all 103 thoracic wounded and injured in most cases (41 people (39.8%)), drainage of the pleural cavity was sufficient to eliminate hemo- and pneumothorax — 25 (24.3%) underwent various surgical interventions from thoracotomic approaches, 16 (15.5%) had various video-assisted thoracoscopic surgeries, 16 (15.5%) had only surgical treatments for gunshot wounds, and 5 (4.9%) wounded and injured had only conservative therapy. Conclusions: Promising, in our opinion, can be the widespread introduction of video-assisted thoracoscopic interventions into the practice of surgeons who are involved in the ATO, followed by a multicenter assessment of the results.
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Kiran, J. V. K., H. Fereed e S. K. Jadhav. "Medicolegal Evaluation of Fatal Firearm injury Cases in Ethiopia: An Autopsy Study". Journal of Indian Academy of Forensic Medicine 45, n. 1 (2023): 24–27. http://dx.doi.org/10.48165/jiafm.2023.45.1.6.
Testo completoAbstract (sommario):
Gunshot wounds are commonly encountered in forensic practice. The courts quite often specifically need to know which firearm injury is entry and which is exit. Although the examination of a recent gunshot wound is often straightforward, the appearance of the firearm wound may be affected by factors like multiple firearm injuries, putrefaction, charring. The forensic practitioner sometimes faces difficulty when the entry or exit wounds present atypically like the absence of secondary effects of discharge, as in decomposed bodies, which are supposed to determine or be specific to entry wound. Sometimes feature like abrasion collar is seen at the exit wound or is present in both entry and exit wounds as in cases of shored exit wound. This study focuses not only on the typical features which determine the entry wound but also on the few cases in which the presentation of entry and exit wounds are atypical. This study can be used in those cases of firearm injuries like multiple firearm injuries and decomposed cases.
Tesi sul tema "Wounds and injuries"
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Ou, Jingxing. "Chronic wound state associated with cytoskeletal defects and exacerbated by oxidative stress in Pax6+/- aniridia-related keratopathy". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25200.
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Foster, Michele. "A window of opportunity : referral from acute care to rehabilitation following traumatic brain injury /". [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16181.pdf.
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Schneider, Jillian Claire Zillmer Eric Moelter Stephen T. "Emotional sequelae of sports-related injuries : concussive and orthopedic injuries /". Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1115.
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Murnyack, Roberta Michelle. "Development of a three-dimensional finite element model of lateral controlled cortical impact injury in the rat with geometry from magnetic resonance imaging". Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17058.
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Lin, Htein. "Causes and prevalence of traumatic injuries to the permanent incisors of school children aged 10-14 years in Maseru, Lesotho". Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&.
Testo completoAbstract (sommario):
The aim of this study was to investigate the prevalence, etiology and types of injuries to permanent incisors among schoolchildren aged 10-14 years from Maseru, Lesotho. Upper and lower permanent incisors were examined for dental injuries.
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Scholtz, Hendrik Johannes. "Fatal penetrating injuries of the chest". Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/26781.
Testo completoAbstract (sommario):
In the Republic of South Africa, an autopsy is required in all cases of unnatural death, or in cases where the cause of death is unknown in terms of the Inquest Act of 1959. These are performed at the Salt River Medicolegal Laboratory by Forensic Pathologists and Registrars of the Department of Forensic Medicine and Toxicology of the University of Cape Town. The Salt River Medicolegal Laboratory serves the greater Cape Town area with a population of approximately 2,5 million, including the magisterial districts of Cape Town, Wynberg, Mitchell's Plain and Simonstown. Cape Town has one of the world's highest homicide rates and in 1986 the incidence was 56, 91 100000 population per annum. In contrast, Singapore has a homicide rate of only 2, 5/100 000, while the United States has an overall homicide rate of 7,7/ 100 000 population. In order to document the true impact of penetrating chest injuries, and to place mortality data in perspective, a retrospective descriptive study of all cases with fatal penetrating chest injuries admitted to the Salt River Medicolegal Laboratory in Cape Town during 1990 was undertaken. In 1990, a total of 5 758 cases was admitted to the Salt River Medicolegal Laboratory of which 1834 cases (39%) were the result of homicide. Of the homicide cases, 408 (22%) were the result of firearm injuries. A total of 2044 (35, 5%) cases admitted was deemed to have died of natural causes. This study identified a total of 841 cases of fatal penetrating injuries of the chest admitted during 1990, which constituted 22,6% of all non-natural cases admitted.
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Ottosson, Carin. "Somato-psycho-social aspects of recovery after traffic injuries /". Stockholm, 2006. http://diss.kib.ki.se/2006/91-7140-721-9/.
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Hudson, Diana Stark. "Immersion- and recreationalboating related injuries in Alaska /". Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-454-6/.
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Margand, Paul Marcus Buchanan. "Ultrastructural changes in electrically damaged x-enopus laevis sciatic nerve". Scholarly Commons, 1991. https://scholarlycommons.pacific.edu/uop_etds/2217.
Testo completoAbstract (sommario):
Electrical injury is known to alter the normal physiological function of nerves. In most cases, the change in function is only minor, but in severe instances the physiological function may be lost entirely. The changes in function involve the ability of the nerve to transmit an impulse, which is a function of the nerve's ability to create and maintain an electrical gradient across its membrane. When the nerve is exposed to an electrical current, the ability to maintain an electrical gradient across the membrane is reduced or lost. This change may be transient or permanent. The changes in the gradient hinder the nerve from propagating the impulse, which is the means of information transfer to and from the CNS (central nervous system). Due to the manner in which human victims are typically exposed to an electric shock, the peripheral axons usually display the greatest change in physiological function.
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Ackermann, Tessa Ruth. "Minor "dings" - major effects? a study into the cognitive effects of mild head injuries in high school rugby". Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1002429.
Testo completoAbstract (sommario):
The present study is part of a larger and ongoing research initiative investigating the cumulative cognitive effects of mild head injury in rugby union and focused specifically on high school rugby players. A comprehensive battery of neuropsychological tests was administered to top team high school rugby players (n = 47), and a non-contact sport control group of top team high school hockey players (n = 34). Direct comparisons of group mean scores and standard deviations across each neuropsychological test were carried out for the Total Rugby group versus the Total Hockey group as well as for the subgroups Rugby Forwards versus Rugby Backs. A correlational analysis was conducted to ascertain whether a relationship exists between the number of mild head injuries reported by the players and their cognitive test performance. Results of the group comparisons of means and variability on WMS Paired Associate Learning Hard Pairs - Delayed Recall provides tentative indications of the initial stages of diffuse damage associated with mild head injury in the rugby group and provides some evidence for impairment of verbal learning and memory in the Rugby Forwards group. The correlational analysis revealed no significant relationship between number of reported mild head injuries and cognitive performance. The findings and possible latent effects of the multiple mild head injuries reported by the rugby players are discussed in terms of brain reserve capacity theory and suggestions for future research are provided.
Libri sul tema "Wounds and injuries"
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Zederfeldt, B. Wounds & wound healing. London: Wolfe Medical, 1986.
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Zederfeldt, Bengt. Wounds & wound healing. London: Wolfe Medical, 1986.
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Aaseng, Nathan. Head injuries. New York: F. Watts, 1996.
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Aaseng, Nathan. Head injuries. New York: F. Watts, 1996.
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Aaseng, Nathan. Head injuries. New York: F. Watts, 1996.
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Collins, John Gary. Types of injuries and impairments due to injuries, United States. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, National Center for Health Statistics, 1986.
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1970-, Aksenov Igor V., e Miller Stuart S, a cura di. MasterMinding wounds. [Flagstaff, AZ]: Best Publishing Company, 2010.
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Teddy, Peter J. Head injuries. Philadelphia: Lippincott, 1989.
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Watson, Neil. Hand injuries andinfections. London: Gower Medical, 1986.
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Dealey, Carol. The Care of Wounds. New York: John Wiley & Sons, Ltd., 2008.
Cerca il testo completoCapitoli di libri sul tema "Wounds and injuries"
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Payne, Christopher, e Andrew Kjos. "Wounds and Injuries". In A Beginner’s Guide to Special Makeup Effects, 89–94. New York : Routledge, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9781003093701-19.
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Weiland, Andrew J., e Rachel S. Rohde. "Gunshot Wounds". In Acute Management of Hand Injuries, 155–58. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522492-42.
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Weiland, Andrew J., e Rachel S. Rohde. "Bite wounds". In Acute Management of Hand Injuries, 135–38. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522492-36.
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Orgill, Dennis P. "Operative Management of Pressure Injuries". In Interventional Treatment of Wounds, 75–84. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-66990-8_5.
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Friedrich, Jeffrey B. "Wounds and Soft-Tissue Injuries". In Musculoskeletal Examination of the Elbow, Wrist, and Hand, 291–309. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003525103-17.
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Presterl, Elisabeth, Magda Diab-El Schahawi, Luigi Segagni Lusignani, Helga Paula e Jacqui S. Reilly. "Puncture Wounds and Needle-Related Injuries". In Basic Microbiology and Infection Control for Midwives, 151–53. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02026-2_16.
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Hanson, R. Reid, e Amelia S. Munsterman. "Treatment of Burn Injuries, Gunshot Wounds, and Dog-Bite Wounds". In Equine Wound Management, 476–89. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118999219.ch20.
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Hadrill, David. "4. How to prevent wounds and injuries; How to treat wounds". In Horse Healthcare, 86–111. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 2002. http://dx.doi.org/10.3362/9781780443515.004.
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Badr, Hoda, Trina M. Barker e Kathrin Milbury. "Couples’ Psychosocial Adaptation to Combat Wounds and Injuries". In Risk and Resilience in U.S. Military Families, 213–34. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7064-0_11.
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Heegaard, William G., e Gary M. Vilke. "Factitious Conducted Electrical Weapon Wounds: Injuries and Considerations". In Atlas of Conducted Electrical Weapon Wounds and Forensic Analysis, 131–42. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3543-3_7.
Testo completoAtti di convegni sul tema "Wounds and injuries"
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Lamping, Jeffrey W., Stephen K. Bubb e Terence E. McIff. "Effectiveness of Negative Pressure in Promoting Tissue Growth Into Porous Metal Implants". In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80884.
Testo completoAbstract (sommario):
Extremity War Injuries (EWI) with large open segmental and periarticular defects constitute a high volume and high morbidity challenge for the military trauma management system. Open segmental tibia and elbow fractures caused by Improvised Explosive Device (IED) wounds, are two examples of such injuries. Several problems occur when trying to repair such a wound. The large, gaping wounds make skin closure difficult. Infection is also a prevalent complication typically caused by debris contaminating the wound. Lastly, large amounts of damaged tissue including segmental bone defects make repair difficult.
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Pintar, Frank A., Srirangam Kumaresan, Brian Stemper, Narayan Yoganandan e Thomas A. Gennarelli. "Finite Element Modeling of Penetrating Traumatic Brain Injuries". In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2602.
Testo completoAbstract (sommario):
Abstract Recent advances in the treatment of penetrating gunshot wounds to the head have saved lives. These advances are largely reported using retrospective analysis of patients with recommendations for treatment. Biomechanical quantification of intracranial deformation/stress distribution associated with the type of weapon (e.g., projectile geometry) will advance clinical understanding of the mechanics of penetrating wounds. The present study was designed to delineate the biomechanical behavior of the human head under penetrating impact of two different projectile geometries using a nonlinear, three-dimensional finite element model. The human head model included the skull and brain. The qualitative comparison of the model output with each type of projectile during various time steps indicates that the deformation/stress progresses as the projectile penetrates the tissue. There is also a distinct difference in the patterns of displacement for each type of projectile. The present study is a first step in the study of the biomechanics of penetrating traumatic brain injuries.
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Frybarger, Michelle R., e Karim H. Muci-Küchler. "Distribution of Bacterial Contamination in Partial Penetration Surrogate Ballistic Wounds". In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23897.
Testo completoAbstract (sommario):
Abstract With the rise in use of IEDs during armed conflicts, there has been an increase in the number of injuries to the extremities. Shrapnel and debris ejected during the explosion become high-speed projectiles capable of penetrating soft tissues, bringing bacterial contamination into the wound. If not properly treated, that contamination could lead to infection. Studies aimed at understanding the distribution of bacterial contamination along the permanent cavity could provide useful information to improve treatment protocols for these types of injuries. In this paper, a lower extremity surrogate model was used to investigate bacterial distribution in partial penetration ballistic wounds. The targets used were ballistic gelatin blocks that had an Escherichia coli-laden filter paper placed on their front face. Spherical projectiles were fired into the targets adjusting their speed to obtain three different partial penetration depths. After each shot, a gelatin strip containing the permanent cavity was extracted and segmented. The permanent cavity was removed from each segment, placed in a test tube with buffer solution, and heated in a water bath to melt the gelatin. Standard microbiology protocols were followed to determine the number of colony forming units (CFUs) in each segment. The bacteria distribution was represented by percent of total CFU in the permanent cavity versus segment number. In addition, bacterial contamination as a function of projectile penetration depth was explored. For the cases considered, most of the bacterial contamination occurred in the segments closer to the projectile entry point.
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Morris, Nichole, Curtis Craig, Katelyn Schwieters, Bradley Drahos, Marshall Mabry, Eugene Floersch e William Kessler. "Limited training in undergarment and clothing removal techniques to expose wounds in combat care". In AHFE 2023 Hawaii Edition. AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1004367.
Testo completoAbstract (sommario):
A critical component of combat casualty care is to fully expose the patient to identify and treat injuries. Completing these actions under stressful conditions is expected to require adequate training. In this study 21 combat lifesaver trained soldiers were surveyed regarding their recent training exposing chest injuries of male and female soldiers. Nearly all participants (95.2%) reported experience in treating male simulated patients; however, only 52.4% reported any experience applying a chest seal on a male human or simulated patient and only 28.6% reported any experience removing the t-shirt of a male human or simulated patient. Seven participants (33.3%) reported experience in treating female simulated patients, 23.8% reported at least some experience applying a chest seal to a female human or simulated patient, and only 9.5% reported experience removing the female patient’s t-shirt and, similarly, a female patient’s bra. Findings suggest a pronounced gap in the CLS training curriculum.
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Zhang, Jiangyue, Narayan Yoganandan, Cheryl A. Muszynski, Frank A. Pintar e Thomas A. Gennarelli. "Analysis of Penetrating Head Impact". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59899.
Testo completoAbstract (sommario):
Impact-induced injuries can be classified into blunt and penetrating types. Penetrating injuries are often the byproduct of gunshot wounds and these injuries to the head result in significant mortality and morbidity. The objective of the study is to determine the probability of fatality as a function of admission Glasgow Coma Scale (GCS) and injury volumes (hematoma and edema) in gunshot wounds using computed tomography (CT) scans. Head CT images from 19 patients were analyzed. Hematoma and edema volumes were computed using grayscale equivalents and special computer software. Hematoma and edema volumes were found to be better predictors than GCS. In addition to admission GCS, hematoma and edema volumes may allow more accurate prediction of outcome, and these data should provide informed counseling of relatives and improved guidelines for more efficient resource allocation during the acute care phase.
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Fabio, Anthony, Shiyao Gao, Michael Bell, Patrick Kochanek e Stephen Wisniewski. "97 Gunshot wounds to the head: the epidemiology of severe paediatric firearm-related traumatic brain injuries". In SAVIR 2017. BMJ Publishing Group Ltd, 2017. http://dx.doi.org/10.1136/injuryprev-2017-042560.97.
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Izmailov, Sergey, Julia Perevezentseva, Andrey Rotkov, Vladimir Beschastnov, Evgeniy Popov e Egor Lukoyanychev. "Mathematical Justification of the Wound suturing by Wound Contractors of new Generation". In International Conference "Computing for Physics and Technology - CPT2020". Bryansk State Technical University, 2020. http://dx.doi.org/10.30987/conferencearticle_5fce2772128d09.10616351.
Testo completoAbstract (sommario):
Frequent cases of man-made disasters, terrorist attacks and military conflicts lead to an increase in the number of victims. Significant soft tissue defects are known to result from gunshot wounds. So, as a result of mine-blasting injuries, defects in the skin and underlying tissues more than 10 cm in diameter are formed in 71.1% of cases. The prerequisite for the uncomplicated course of the wound process is to achieve an adequate comparison of the edges of the wound without excessive tension. To close such extensive wounds, various technical means are used: sutures on pads, various types of dermatotension. We have developed various models of wound contractors (RC) for treatment of wounds. With the help of the RC, a complete reposition and good adaptation of the edges of the wound is created. The wound closure method using these RC almost completely eliminates tissue cutting and limits the sawing effect to a minimum. This is explained by the effects of elastic forces reducing to zero when matching soft tissues and suturing. The use of hardware methods for suturing wounds requires the development of mathematical models of various types of wounds and surgical sutures. These models should provide a simulation of living tissues of the wound edges behavior to achieve the best results in the treatment of wounds by RC advanced technologies. The purpose of this study is to mathematically justify RC with the parallel holding of spokes. Another purpose is to develop a mathematical model of the wounds suturing by hardware technology.
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Zhang, Jiangyue, e Frank A. Pintar. "A Finite Element Study of Blast Overpressure on the Skull With and Without Helmet". In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19083.
Testo completoAbstract (sommario):
The use of advanced personal armor, especially the helmet, during combat has significantly reduced the incidence and severity of life threatening penetrating injuries from gunshot and blast shrapnel to the head and improved the overall survival rate of soldiers in combat [1]. On the other hand, the number of blast related injuries (68%) has increased to more than 4 times that of gunshot wounds (15%) and other injuries (17%), among which blast-induced traumatic brain injury (bTBI) has became the signature wound of the U.S. armed forces in Iraq and Afghanistan due to increased use of improvised explosive devices (IED) and rocket-propelled grenades (RPG) by the insurgents [2–4]. It is well known in detonation physics that the presence of a close proximity surface will increase the overpressure on the target due to blast wave reflection [5, 6]. The helmet, which has saved many lives from otherwise fatal penetration and blunt impact injuries, may unfortunately also serve as a reflecting surface and pose increased blast injury threat to the head. Consequently, the current study was designed to compare blast overpressures on the skull with and without helmet using a human head computational model.
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Zhang, Jiangyue, Narayan Yoganandan, Frank A. Pintar, Yabo Guan e Thomas A. Gennarelli. "Experimental Study on Non-Exit Ballistic Induced Traumatic Brain Injury". In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176407.
Testo completoAbstract (sommario):
Ballistic-induced traumatic brain injury remains the most severe type of injury with the highest rate of fatality. Yet, its injury biomechanics remains the least understood. Ballistic injury biomechanics studies have been mostly focused on the trunk and extremities using large gelatin blocks with unconstrained boundaries [1, 2]. Results from these investigations are not directly applicable to brain injuries studies because the human head is smaller and the soft brain is enclosed in a relatively rigid cranium. Thali et al. developed a “skin-skull-brain” model to reproduce gunshot wounds to the head for forensic purposes [3]. These studies focused on wound morphology to the skull rather than brain injury. Watkins et al. used human dry skulls filled with gelatin and investigated temporary cavities and pressure change [4]. However, the frame rate of the cine X-ray was too slow to describe the cavity dynamics, and pressures were only quantified at the center of skull. In addition, the ordnance gelatin used in these studies is not the most suitable simulant to model brain material because of differences in dynamic moduli [5]. Sylgard gel (Dow Corning Co., Midland, MI) demonstrates similar behavior as the brain and has been used as a brain surrogate to determine brain deformations under blunt impact loading [6, 7]. Zhang et al. used the simulant for ballistic brain injury and investigated the correlation between temporary cavity pulsation and pressure change [8, 9]. However, the skulls used in these models were not as rigid as the human cranium. The presence of a stronger cranial bone may significantly decrease the projectile velocity and change the kinematics of cavity and pressure distribution in the cranium. In addition, projectiles perforated through the models in these studies. Patients with through-and-through perforating gunshot wounds to the head have a greater fatality rate than patients with non-exit penetrating wounds [10]. Therefore, it is more clinically relevant to investigate non-exit ballistic traumatic brain injuries. Consequently, the current study is designed to investigate the brain injury biomechanics from non-exit penetrating projectile using an appropriately sized and shaped physical head model.
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Hinz, Brandon J., e Karim H. Muci-Küchler. "Study of Air Flow Into Ballistic Wounds Using Flow Visualization Experiments and Numerical Simulations". In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88106.
Testo completoAbstract (sommario):
A common type of battlefield injury involves high speed fragments of different sizes and shapes hitting the human body, particularly the extremities. Gaining a better understanding of the mechanisms involved in those injuries can result in better strategies for providing medical care. One aspect that still requires additional research is the contamination of ballistic wounds. Studies published in the open literature have shown that in perforating projectile wounds airborne debris such as skin, cloth, and soil particles are introduced into the wound by either the projectile or by the suction created due to the formation of the temporary wound cavity. These debris can transport bacteria resulting in infection, delayed wound healing, or other complications. The amount of suction and ultimately the bacteria distribution in ballistic wounds can vary depending on parameters such as projectile velocity, caliber, mass, and location of injury. Numerical models can be used to study the influence of various parameters on the suction effect but experimental data is needed to validate the simulation results. This paper presents an experiment developed to provide an initial evaluation of numerical models of the air flow and suction effect in perforating projectile wounds. The experiment used rectangular prism (cuboid) targets made of ballistic gelatin which is a common soft-tissue surrogate material used in ballistic research. These targets were shot with 11.43 mm (0.45 in) caliber round lead projectiles fired from air rifles at approximately 230 m/s. The air flow into the temporary cavity of the tissue surrogate targets was visualized using a vapor curtain placed at the projectile entry location. A high speed digital camera captured the movement of the vapor curtain and the formation of the temporary wound cavity during the tests. To simulate the experiment, a Coupled Eulerian-Lagrangian (CEL) model was run using Abaqus/Explicit. In the model, the mechanical behavior of the soft-tissue surrogate target was represented using a hyper-elastic constitutive relation. A small pre-made cylindrical channel was added to the targets to avoid using techniques such as element erosion or considering material failure when modeling the passage of the projectile through the material. Qualitative and limited quantitative results from the model were compared with the results from the laboratory tests.
Rapporti di organizzazioni sul tema "Wounds and injuries"
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Potter, Benjamin K. Serum and Exudate Calcitonin Precursors as Predictors of Wound Infection and Dehiscence in Wartime Penetrating Injuries. Fort Belvoir, VA: Defense Technical Information Center, agosto 2010. http://dx.doi.org/10.21236/ada569539.
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Potter, Benjamin K. Serum and Exudate Calcitonin Precursors as Predictors of Wound Infection and Dehiscence in Wartime Penetrating Injuries. Addendum. Fort Belvoir, VA: Defense Technical Information Center, febbraio 2011. http://dx.doi.org/10.21236/ada569442.
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Christensen, Eric, Candace Hill, Pat Netzer, DeAnn Farr, Elizabeth Schaefer e Joyce McMahon. Economic Impact on Caregivers of the Seriously Wounded, Ill, and Injured. Fort Belvoir, VA: Defense Technical Information Center, aprile 2009. http://dx.doi.org/10.21236/ada499838.
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Berdiqulov, Aziz. ECMI Minorities Blog. Is Uzbekistan Not Ready to Let It Go? Unrest in Karakalpakstan. European Centre for Minority Issues, settembre 2022. http://dx.doi.org/10.53779/kpsa1020.
Testo completoAbstract (sommario):
In July 2022, unprecedented demonstrations took place in Uzbekistan’s Autonomous Republic of Karakalpakstan. These demonstrations followed proposed constitutional amendments which would remove Karakalpakstan’s right to freely secede from the Uzbek Republic. Thousands of Karakalpaks joined together for peaceful demonstrations to protest against the changes concerning their homeland. Tashkent reacted in line with what seems to have become a Central Asian formula: military troops were sent to suppress the demonstrations, which led to multiple deaths and injuries; the Internet was shut down; curfews were introduced; and checkpoints were set up around the region. The President of Uzbekistan, Shavkat Mirziyoyev, came to Karakalpakstan to promise that its status would not change as the proposed amendments would be removed. The probability of Karakalpakstan seceding through a referendum remains low: it is the poorest region of Uzbekistan, and Karakalpaks are not even the majority of the population there. However, the status and the right to secede seem to play a significant symbolic role to the Karakalpak people, as their quick and coordinated mobilisation has shown.
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Dahl, Kristina, e Rachel Licker. Too Hot to Work: Assessing the Threats Climate Change Poses to Outdoor Workers. Union of Concerned Scientists, agosto 2021. http://dx.doi.org/10.47923/2021.14236.
Testo completoAbstract (sommario):
Outdoor workers face severe risks from extreme heat—risks that will increasingly threaten the health and livelihood of tens of millions of outdoor workers in the United States as climate change makes dangerously hot days more frequent and intense. With economic and legal systems that routinely discount their lives and safety, workers who experience heat-related injuries or illnesses on the job have little to no recourse. By midcentury, with no action to reduce global warming emissions, an estimated $37.1 billion in outdoor workers’ earnings would be at risk annually due to extreme heat. Even with bold action to limit emissions, outdoor workers will face severe and rising risks from extreme heat. Policymakers and employers must take actions to protect outdoor workers.
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Chiavassa, Nathalie, e Raphael Dewez. Technical Note on Road Safety in Haiti. Inter-American Development Bank, gennaio 2021. http://dx.doi.org/10.18235/0003250.
Testo completoAbstract (sommario):
The IDB has been a predominant partner supporting Haiti development efforts for many years. Nowadays, the IDB is the main source of investment for the country. Considering the vital weight of road transport sector in the socio-economy of the country, the IDB has concentrated a large part of investment efforts in rehabilitating and improving national road infrastructures. In the same time, a rapid increase of motorization and relatively higher speeds have contributed to increasing the number of traffic fatalities and injuries. In 2017, road injuries were the fifth cause of mortality in Haiti. The Road Safety situation of the country is preoccupying with many Vulnerable Road Users involved, in particular pedestrians and motorcyclists. The country is facing multi-sector challenges to address this Road Safety situation. Despite recent efforts, high political will has not been continuous in promoting a multi-sector coordination and the success of technical efforts remained mitigated over the last years. Road user awareness is still weak in the country. Risk factors include dangerous driving, bad safety conditions of vehicles, together with limited law enforcement and poor maintenance of safety devices on the roads. In this context, the Road Safety situation of the country may be getting worse in the coming years if no action is taken. However, the new Decade provides with a unique opportunity to achieve Sustainable Development Goals (SDGs) including significant progress in reducing the burden of traffic crashes. The IDB has already initiated vital investments in modernizing crash data collection, promoting institutional dialogue and supporting capacity building in the area of Road Safety. Future actions to address Road Safety challenges in Haiti in the framework of the five UN five pillars would require a range of investments in the area of political commitment, institutional coordination and technical efforts. A change of political paradigm from making roads for travelling faster to making roads safer for all users is highly needed at national level. This technical note on Road Safety in Haiti present the current situation of the country and provides with recommendations for future actions on Road Safety.
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Regan, Jack, e Robin Zevotek. Study of the Fire Service Training Environment: Safety and Fidelity in Concrete Live Fire Training Buildings. UL Firefighter Safety Research Institute, luglio 2018. http://dx.doi.org/10.54206/102376/wxtw8877.
Testo completoAbstract (sommario):
The goal of fire service training is to prepare students for the conditions and challenges that they face on the fireground. Among the challenges that firefighters routinely face on the fireground are ventilation-controlled fires. The hazard of these fires has been highlighted by several line-of-duty deaths and injuries in which a failure to understand the fire dynamics produced by these fires has been a contributing factor. The synthetic fuels that commonly fill contemporary homes tend to result in ventilation-controlled conditions. While synthetic fuels are common on the residential fireground, the fuels that firefighters use for fire training are more often representative of natural, wood-based fuels. In order to better understand the fire dynamics of these training fires, a series of experiments was conducted in a concrete live fire training building in an effort to evaluate the fidelity and safety of two training fuels, pallets and OSB, and compare the fire dynamics created by these fuels to those created by a fuel load representative of a living room set with furniture items with a synthetic components. Additionally, the effects of the concrete live fire training building on the fire dynamics were examined. The two training fuel loads were composed of wooden pallets and straw, and pallets, straw, and oriented strand board (OSB). The results indicated that the high leakage area of the concrete live fire training building relative to the fuel load prevented the training fuel packages from becoming ventilation-controlled and prevented the furniture package from entering a state of oxygen-depleted decay. The furniture experiments progressed to flashover once ventilation was provided. Under the conditions tested, the wood based fuels, combined with the construction features of this concrete live fire training building, limited the ability to teach ventilation-controlled fire behavior and the associated firefighting techniques. Additionally, it was shown that the potential for thermal injury to firefighters participating in a training evolution existed well below thresholds where firefighter PPE would be damaged.
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Rana, Arnav, e Sanjay Tiku. PR-214-223806-R01 Guidance for Performing Engineering Critical Assessments for Dents on Natural Gas Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), novembre 2023. http://dx.doi.org/10.55274/r0000044.
Testo completoAbstract (sommario):
This project builds on mechanical damage (MD) assessment and management tools, developed on behalf of Pipeline Research Council International (PRCI), Interstate Natural Gas Association of America (INGAA), Canadian Energy Pipeline Association (CEPA), American Petroleum Institute (API), other research organizations and individual pipeline operators and included in API RP 1183 [1]. These include dent shape, restraint condition and interacting feature characterization; operational maximum and cyclic internal pressure characterization, screening tools defining non-injurious dent shapes based on pipe size and operating condition, failure pressure and fatigue assessment tools for dents with/without interacting features (e.g., corrosion, welds, gouges) in the restrained and unrestrained condition, and direction on available remedial action and repair techniques. The API RP 1183 [1], has not been adopted by the Pipeline and Hazardous Materials Safety Administration (PHMSA) by reference in code of federal regulations (CFR) 192.712 (c). CFR 192.712 (c) allows pipeline operators to follow certain prescriptive requirements for responding to mechanical damage features or perform an engineering critical assessment (ECA). The requirements of CFR 192.712 (c) provide minimum requirements for what would comprise an acceptable ECA. The objective of this research project is to develop a guidance document containing a practical and defensible set of guidelines and processes to address the CFR 192.712 (c) requirements. The work included: - Description of various dent fatigue life screening and assessment approaches detailing data requirements for the different approaches, - Developing a simplified method for dent fatigue life assessment using operational severity when detailed pressure spectrum data is not available, - Development of a Level 0.75 and 0.75+ screening approach that incorporates dent depth available from in-line inspection (ILI) data, - Developing a screening level methodology to carry out fatigue life assessment of dents with potential gouge where metal loss is conservatively assumed to be a planar crack-like feature.
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Arumugam, Udayansankar, Mimoun Elboujdaini, Ming Gao e Ramiro Vanoye. PR-328-133702-R02 F-S Fatigue Testing of Crack-in-Dent with Framework for Life Prediction. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), ottobre 2019. http://dx.doi.org/10.55274/r0011628.
Testo completoAbstract (sommario):
ASME B31.8 states that "Dents that contain stress corrosion cracking or other cracks are injurious to the pipeline" and therefore, requires immediate attention by the Operators. Dent containing crack fields (colonies) are often observed in liquid pipelines. The recently completed PRCI research project MD-1N "Study of the Mechanism for Cracking in Dents in a Crude Oil Pipeline" showed evidence of a mechanism for fatigue cracking. The crack growth rate as a function of stress intensity factor was estimated using the measured spacings of fatigue striations from fracture surfaces based on the assumption that the formation of fatigue striations on a cycle-by-cycle basis. However, due to the lack of full-scale fatigue crack growth data, the success was limited. This gap prompted PRCI to launch a full-scale experimental investigation of crack growth rates of cracks in dents under cyclic pressure load in the simulated groundwater NS4 environment (PRC-328-133702, MD-1Q). The objective of the study was to determine the crack growth rate as a function of stress intensity factor, the number of cycles to failure, and the failure modes of cracks in dents. The test results would be used to evaluate the validity of cycle-by-cycle based assumption for crack growth rate estimation from the measured fatigue-striation-spacing. The investigation was also aimed at establishing a framework for remaining fatigue life prediction of cracks in dents in liquid pipelines. This framework would benefit liquid pipeline Operators to manage better the integrity of dents associated with corrosion fatigue cracking in groundwater. A total of six pipe samples containing cracks in shallow dents excavated from a retired 24-inch diameter liquid transmission pipeline were available and used for the full-scale fatigue tests. The test system developed under the project consisted of four components: (1) a computer-controlled hydraulic pressure cycling system, (2) an environment chamber containing a simulated groundwater NS4 solution mounted on the pipe in around the dent region to provide a simulated field environment condition; (3) real-time crack growth monitoring systems including direct cur-rent potential drop (DCPD), Clip gage and Strain gage; (4) data acquisition system. The cyclic pressure range used in the fatigue tests was 78 to 780 psig (72%SMYS) with R=0.1, which was based on historical operational pressure data and the Rain flow analysis. A constant frequency of 0.0526 Hz was selected for the testing to ensure the frequency requirement for corrosion fatigue is met. The remaining fatigue life of cracks-in-dents and failure modes were evaluated using the full-scale fatigue test results. Further, fatigue crack growth rates were established. Finally, a framework was developed for the life prediction of cracks in shallow dents based on the findings from six full-scale fatigue cyclic tests. This framework will assist liquid pipeline operators to estimate the remaining fatigue life for cracks in shallow dents utilizing inputs from ILI and pipeline's historical operational pressure fluctuation data and to mitigate the threat of cracks in dents in a timely manner. There is a related webinar.
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Drury, J., S. Arias, T. Au-Yeung, D. Barr, L. Bell, T. Butler, H. Carter et al. Public behaviour in response to perceived hostile threats: an evidence base and guide for practitioners and policymakers. University of Sussex, 2023. http://dx.doi.org/10.20919/vjvt7448.
Testo completoAbstract (sommario):
Background: Public behaviour and the new hostile threats • Civil contingencies planning and preparedness for hostile threats requires accurate and up to date knowledge about how the public might behave in relation to such incidents. Inaccurate understandings of public behaviour can lead to dangerous and counterproductive practices and policies. • There is consistent evidence across both hostile threats and other kinds of emergencies and disasters that significant numbers of those affected give each other support, cooperate, and otherwise interact socially within the incident itself. • In emergency incidents, competition among those affected occurs in only limited situations, and loss of behavioural control is rare. • Spontaneous cooperation among the public in emergency incidents, based on either social capital or emergent social identity, is a crucial part of civil contingencies planning. • There has been relatively little research on public behaviour in response to the new hostile threats of the past ten years, however. • The programme of work summarized in this briefing document came about in response to a wave of false alarm flight incidents in the 2010s, linked to the new hostile threats (i.e., marauding terrorist attacks). • By using a combination of archive data for incidents in Great Britain 2010-2019, interviews, video data analysis, and controlled experiments using virtual reality technology, we were able to examine experiences, measure behaviour, and test hypotheses about underlying psychological mechanisms in both false alarms and public interventions against a hostile threat. Re-visiting the relationship between false alarms and crowd disasters • The Bethnal Green tube disaster of 1943, in which 173 people died, has historically been used to suggest that (mis)perceived hostile threats can lead to uncontrolled ‘stampedes’. • Re-analysis of witness statements suggests that public fears of Germany bombs were realistic rather than unreasonable, and that flight behaviour was socially structured rather than uncontrolled. • Evidence for a causal link between the flight of the crowd and the fatal crowd collapse is weak at best. • Altogether, the analysis suggests the importance of examining people’s beliefs about context to understand when they might interpret ambiguous signals as a hostile threat, and that. Tthe concepts of norms and relationships offer better ways to explain such incidents than ‘mass panic’. Why false alarms occur • The wider context of terrorist threat provides a framing for the public’s perception of signals as evidence of hostile threats. In particular, the magnitude of recent psychologically relevant terrorist attacks predicts likelihood of false alarm flight incidents. • False alarms in Great Britain are more likely to occur in those towns and cities that have seen genuine terrorist incidents. • False alarms in Great Britain are more likely to occur in the types of location where terrorist attacks happen, such as shopping areass, transport hubs, and other crowded places. • The urgent or flight behaviour of other people (including the emergency services) influences public perceptions that there is a hostile threat, particularly in situations of greater ambiguity, and particularly when these other people are ingroup. • High profile tweets suggesting a hostile threat, including from the police, have been associated with the size and scale of false alarm responses. • In most cases, it is a combination of factors – context, others’ behaviour, communications – that leads people to flee. A false alarm tends not to be sudden or impulsive, and often follows an initial phase of discounting threat – as with many genuine emergencies. 2.4 How the public behave in false alarm flight incidents • Even in those false alarm incidents where there is urgent flight, there are also other behaviours than running, including ignoring the ‘threat’, and walking away. • Injuries occur but recorded injuries are relatively uncommon. • Hiding is a common behaviour. In our evidence, this was facilitated by orders from police and offers from people staff in shops and other premises. • Supportive behaviours are common, including informational and emotional support. • Members of the public often cooperate with the emergency services and comply with their orders but also question instructions when the rationale is unclear. • Pushing, trampling and other competitive behaviour can occur,s but only in restricted situations and briefly. • At the Oxford Street Black Friday 2017 false alarm, rather than an overall sense of unity across the crowd, camaraderie existed only in pockets. This was likely due to the lack of a sense of common fate or reference point across the incident; the fragmented experience would have hindered the development of a shared social identity across the crowd. • Large and high profile false alarm incidents may be associated with significant levels of distress and even humiliation among those members of the public affected, both at the time and in the aftermath, as the rest of society reflects and comments on the incident. Public behaviour in response to visible marauding attackers • Spontaneous, coordinated public responses to marauding bladed attacks have been observed on a number of occasions. • Close examination of marauding bladed attacks suggests that members of the public engage in a wide variety of behaviours, not just flight. • Members of the public responding to marauding bladed attacks adopt a variety of complementary roles. These, that may include defending, communicating, first aid, recruiting others, marshalling, negotiating, risk assessment, and evidence gathering. Recommendations for practitioners and policymakers • Embed the psychology of public behaviour in emergencies in your training and guidance. • Continue to inform the public and promote public awareness where there is an increased threat. • Build long-term relations with the public to achieve trust and influence in emergency preparedness. • Use a unifying language and supportive forms of communication to enhance unity both within the crowd and between the crowd and the authorities. • Authorities and responders should take a reflexive approach to their responses to possible hostile threats, by reflecting upon how their actions might be perceived by the public and impact (positively and negatively) upon public behaviour. • To give emotional support, prioritize informative and actionable risk and crisis communication over emotional reassurances. • Provide first aid kits in transport infrastructures to enable some members of the public more effectively to act as zero responders.