Academic literature on the topic 'Neonatal umbilical artery'
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Journal articles on the topic "Neonatal umbilical artery"
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Merina, Gyawali, and Poudel Ramesh. "Study of abnormal umbilical artery doppler and neonatal outcome." Asian Journal of Medical Sciences 10, no. 5 (August 11, 2019): 98–101. http://dx.doi.org/10.3126/ajms.v10i5.25135.
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Background: Doppler provides assessment of uteroplacental and fetoplacental circulation during pregnancy. It is a sensitive tool in early detection of fetal compromise and allows needful intervention.
Aims and Objective: To study the role of umbilical artery doppler in clinically suspected IUGR and its implication on neonatal outcome.
Materials and Methods: A total of 104 singleton pregnancies with gestational age of more than 34 weeks who had clinical suspicion of IUGR were evaluated using obstetric ultrasound and doppler. Umbilical arteryvelocimetry with S/D >3 and RI >0.7 were considered abnormal. Newborns were classified as either small for gestational age (SGA) ie, IUGR or appropriate for gestational age (AGA). Neonatal outcome were classified as either normal or adverse events that included still birth, NICU admissions, perinatal asphyxia and/or neonatal death.
Results: Out of 104 clinically suspected IUGR, 55 were born with small for gestational age. Among these SGA neonates, 45 subjects had abnormal umbilical artery S/D and 42 had abnormal RI. Abnormal umbilicalartery S/D ratio had a sensitivity of 81.8 %, specificity of 59.2 %, the positive predictive value of 69.2 % and negative predictive value of 74.4 %. Abnormal Umbilical artery RI had a sensitivity of 76.4 %, specificity of 69.4 %, positive predictive value of 73.7 % and negative predictive value of 72.3 % in diagnosing IUGR. Abnormal umbilical artery velocimetry was associated with increased morbidity and mortality in IUGR neonates.
Conclusions: Umbilical artery doppler plays an important role in diagnosing IUGR and predicting neonatal outcome.
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Patil, Suman Shivanagouda, Sukanya ., Suman Rath, and Carolin Elizabeth George. "Study on umbilical cord arterial blood gas analysis and cord blood lactate levels as predictors for adverse neonatal outcome: an observational study." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 4 (March 27, 2018): 1494. http://dx.doi.org/10.18203/2320-1770.ijrcog20181342.
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Background: Perinatal asphyxia is a major cause of neonatal and childhood morbidity and mortality. Electronic foetal monitoring is used routinely to know the condition of the baby during Intrapartum period. Normal trace correlates highly with absence of acidemia at birth. Abnormal trace needs further evaluation. In order to better define the metabolic status of the new born, umbilical lactate levels have been measured. Objectives of this study were to determine the validity of umbilical cord blood lactate levels in predicting the adverse early neonatal outcome in babies with intrapartum foetal distress and to compare the validity of umbilical cord blood lactate and umbilical artery pH in predicting adverse neonatal outcome in babies with intrapartum foetal distress.Methods: 295 pregnant women with abnormal CTG in active labour were subjected for estimation of cord blood lactate and umbilical artery pH immediately after delivery and were compared in predicting adverse neonatal outcome.Results: In the present study specificity of serum lactate (97.7%) and umbilical artery pH (95.97%) was almost similar in babies with Apgar <7 at 1 minute and 5 minutes, but sensitivity of serum lactate (23.14%) and cord ph (31.4%) was less in babies with Apgar score ≤7 at 1 minute. Area under ROC showed serum lactate is more accurate in predicting adverse neonatal outcome compared to umbilical artery pH.Conclusions: Umbilical cord blood lactate is more specific than umbilical artery pH in predicting adverse neonatal outcome. Area under ROC (at 95th percentile) shown serum lactate is more accurate in predicting adverse neonatal outcome compared to umbilical artery pH at birth.
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Choudhary, Neelima, Ashima Kesri, Shilpi Nain, Vikas Chaudhary, and S. S. Trivedi. "Effects of antenatal corticosteroids administration on fetoplacental circulation in preterm pregnancies with intrauterine growth restriction and its correlation with perinatal outcome." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9, no. 6 (May 27, 2020): 2566. http://dx.doi.org/10.18203/2320-1770.ijrcog20202349.
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Background: Antenatal corticosteroid administration in preterm pregnancies is recommended to promote fetal lung maturation. Studies have reported temporary reduction in fetal heart rate, breathing and movements following maternal corticosteroid administration. Authors studied effect of maternal corticosteroid administration on fetoplacental circulation in preterm pregnancies with IUGR and its correlation with perinatal outcome.Methods: Observational study included 77 preterm singleton pregnant women with IUGR. Color doppler day 0 (before betamethasone) of umbilical artery of 77 cases done. All received two doses of 12 mg of betamethasone intramuscularly 24 hours apart. Umbilical artery doppler on day 2 (24 to 48 hours of 1st dose of betamethasone) and day 4 (72 to 96 hours of 1st dose of betamethasone) done. Pulsatility index (PI) of umbilical artery on doppler and Neonatal details of all women noted.Results: On day 2 doppler, 56 (73%) women (Group A) showed decrease in umbilical artery PI while 21 (27%) women (Group B) did not show decrease in umbilical artery PI. Mean umbilical artery PI of 77 cases on day 0 and day 2 were 1.73±0.73 and 1.54±0.76 respectively (p<0.001). Mean Umbilical artery PI values of undelivered 60 cases on day 0, day 2 and day 4 were 1.55±0.61, 1.33±0.55 and 1.47±0.63 respectively (p<0.001). Group B neonates had poorer Apgar scores, higher neonatal complication, longer hospital stay, lesser umbilical pH at birth and higher perinatal mortality rate than Group A neonates.Conclusions: Significant reduction in mean umbilical artery PI observed on day 2 following betamethasone administration (p<0.001), which was maintained till 4th day after 1st dose of betamethasone (p<0.05). Women who showed improvement in umbilical artery pulsatility index following betamethasone administration had a better perinatal outcome as compared to women who did not.
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Majid Salman, Ahmed, Mohammed A.K. Al-Jiboori, Hadeel Qasim Khaleel, and Enas Adnan. "The Role of The Doppler Study (Umbilical, Middle, Cerebral Arteries and Ductus Venosus) to Predict General Adverse Pregnancy Outcomes in Patients With Hypertensive Diseases in The Third Trimester." Diyala Journal of Medicine 21, no. 2 (December 25, 2021): 10–21. http://dx.doi.org/10.26505/djm.21025751023.
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Background: The hypertensive pregnancies complicated by preeclampsia show an increase in maternal and perinatal morbidity and mortality.Color Doppler ultrasound has been employed for fetal surveillance. Objective: To evaluate the role of Doppler study in the prediction of adverse pregnancy outcomes in hypertensive pregnant women at the third trimester of pregnancy. Patients and Methods: A clinical prospective follow up study conducted in Outpatient Ultrasound Clinic at Al-Imamein Kadhimein Medical City, Baghdad, Iraq from 1st July, 2018 till 31st of July 2019 included 50 pregnant women with hypertensive disorder of pregnancy at the third trimester. The fetal and neonatal outcome was reported poor when intrauterine fetal death occurs during follow-up of pregnant women or more than two of the reported neonatal complications were poor. Results: Means of the middle cerebral artery and umbilical artery-resistance and pulasatility indices ratio were significantly decreased among pregnant women with poor neonatal outcomes. Similarly, the umbilical artery end-diastolic flow and Ductus Venousu waveforms were Conclusion: The middle cerebral artery and umbilical artery indices of pregnant women with hypertensive disorders are good predictors for neonatal outcomes. Keywords: Hypertensive disorder, Middle cerebral artery, Umbilical artery, Ductus venosus
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Pari, Priyatharsini, Bharathi U, Pradha Velu, and Sowndaravel S. "The missing umbilical artery – A case report." IP Journal of Diagnostic Pathology and Oncology 6, no. 4 (November 15, 2021): 322–24. http://dx.doi.org/10.18231/j.jdpo.2021.069.
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Single umbilical artery (SUA) is a condition where one umbilical artery exists. Normally, the umbilical artery contains two umbilical artery and one umbilical vein. The incidence of SUA varies from 0.2% to 0.8%. We present a case of SUA in a term baby with birth weight of 1.7kg delivered by a 28-year-old mother. SUA is a condition which must be kept in mind during histopathological examination since it helps in improving the neonatal and maternal care.
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L., Rashmi, and Ashish Bhattacharjee. "Umbilical artery Doppler indices in relation to fetal outcome in high risk pregnancy." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 2 (January 23, 2018): 628. http://dx.doi.org/10.18203/2320-1770.ijrcog20180184.
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Background: Umbilical artery Doppler indices in relation to fetal outcome in high risk pregnancy. The aim of this study was to study the umbilical artery Doppler velocimetry in predicting the fetal outcome in high risk pregnancy. This is a prospective study done over a period of 1 year in Silchar Medical College and Hospital from 1st September 2011 to 31st August 2012. 100 women with singleton pregnancy with high risk admitted in SMCH were subjected to umbilical artery Doppler along with morphology and biometry scan after fulfilling the inclusion and exclusion criteria.Methods: 100 women with high risk pregnancy were evaluated by umbilical artery velocimetry between 28 and 41 weeks of pregnancy. Outcome of pregnancy was recorded for the normal Doppler group (n = 79; 79%), the low-end diastolic flow group (n = 19; 19%) and the group with absent/reversed diastolic flow (n = 2; 2%).Results: Mothers with abnormal velocimetry had more number of caesarean sections than those with normal velocimetry. The diagnosis to delivery interval, gestational age at delivery and average birth weight were comparatively lower with higher incidence of admission to neonatal intensive care unit in foetuses with abnormal umbilical Doppler velocimetry. Sensitivity, specificity, positive and negative predictive values of Doppler for detecting abnormal fetal outcome were 43%, 83%, 33% and 88% respectively. Statistical analysis used: sensitivity, specificity and predictive values.Conclusions: Fetuses with normal flow velocimetry are at lower risk than those with abnormal velocimetry in terms of poor Apgar score and neonatal intensive care admission. The average birth weight of the neonates with abnormal Doppler studies was lower than that of neonates with normal velocimetry. Doppler velocimetry studies of umbilical artery can provide the obstetrician important information regarding fetal wellbeing to help him improve fetal outcome.
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Contag, Stephen, Silvia Visentin, Katherine Goetzinger, and Erich Cosmi. "Use of the Renal Artery Doppler to Identify Small for Gestational Age Fetuses at Risk for Adverse Neonatal Outcomes." Journal of Clinical Medicine 10, no. 9 (April 23, 2021): 1835. http://dx.doi.org/10.3390/jcm10091835.
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Objective: To measure the sensitivity and positive predictive value (PPV) for an adverse neonatal outcome among growth-restricted fetuses (FGR) comparing the cerebral–placental ratio (CPR) with the cerebral–renal ratio (CRR). Methods: Retrospective analysis of 92 women who underwent prenatal ultrasound at the University of Maryland and the University of Padua. Renal, middle cerebral and umbilical artery Doppler waveforms were recorded for all scans during the third trimester. The last scan prior to delivery was included for analysis. We calculated the test characteristics of the pulsatility indices (PI) of the umbilical and renal arteries in addition to the derived CPR and CRR to detect a composite adverse neonatal outcome. Results: The test characteristics of the four Doppler ratios to detect increased risk for the composite neonatal outcome demonstrated that the umbilical artery pulsatility index had the best test performance (sensitivity 64% (95% CI: 47–82%), PPV 24% (95% CI: 21–27), and positive likelihood ratio 2.7 (95% CI: 1.4–5.2)). There was no benefit to using the CRR compared with the CPR. The agreement between tests was moderate to poor (Kappa value CPR compared with CRR: 0.5 (95%CI 0.4–0.70), renal artery PI:−0.1 (95% CI −0.2–0.0), umbilical artery PI: 0.5 (95% CI 0.4–0.7)). Only the umbilical artery had an area under the receiver operating curve that was significantly better compared with the CPR as a reference (p-value < 0.01). Conclusions: The data that we present do not support the use of renal artery Doppler as a useful clinical test to identify a fetus at risk for an adverse neonatal outcome. Within the various indices applied to this population, umbilical artery Doppler performed the best in identifying the fetuses at risk for an adverse perinatal outcome.
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Birs, Antoinette S., Jose A. Perez, Mark A. Rich, and Hubert S. Swana. "Delayed Diagnosis of Iatrogenic Bladder Perforation in a Neonate." Case Reports in Urology 2016 (2016): 1–3. http://dx.doi.org/10.1155/2016/1425373.
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Iatrogenic bladder injuries have been reported in the neonate during umbilical artery/vein catheterization, voiding cystourethrogram, urinary catheterizations, and overwhelming hypoxic conditions. Patients with iatrogenic bladder perforations can present with acute abdomen indicating urinary peritonitis, septic-uremic shock, or subtle symptoms like abdominal distension, pain, hematuria, uremia, electrolyte imbalances, and/or difficulty urinating. The following neonatal case report of perforated bladder includes a review of the signs, symptoms, diagnostic tools, and management of bladder injury in neonates.
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Weisz, Boaz, Liat Hogen, Yoav Yinon, Liat Gindes, Alon Shrim, Michal Simchen, Eyal Schiff, and Shlomo Lipitz. "Perinatal Outcome of Monochorionic Twins With Selective IUGR Compared With Uncomplicated Monochorionic Twins." Twin Research and Human Genetics 14, no. 5 (October 1, 2011): 457–62. http://dx.doi.org/10.1375/twin.14.5.457.
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Objective: To evaluate the perinatal outcome of MC twins with selective IUGR (sIUGR).Study design: A prospective study, which included three groups of MC twins: Group A, uncomplicated MC twin pregnancies (n = 91); group B, sIUGR with normal umbilical artery Doppler (n = 19); and group C, sIUGR with abnormal (absence or reversed EDV) umbilical artery Doppler (n = 18). The latter were routinely hospitalized in the high-risk ward under strict surveillance.Results: Neonatal outcome of fetuses complicated with sIUGR and normal Doppler was similar to controls. Neonates born to pregnancies complicated by sIUGR and abnormal Doppler had significantly increased incidence of CNS findings, RDS, NEC, sepsis, and neonatal death compared to controls. Adverse outcome in this group was independently associated only with gestational age at birth.Conclusion: The perinatal outcomes of MC twins complicated with sIUGR and normal Doppler are similar to uncomplicated MC pregnancies. MC twins with sIUGR and abnormal Doppler have reasonable outcomes, yet significantly more neonatal complications compared to non-complicated MC twins.
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Katz, ME, JM Perlman, ED Tack, and WH McAlister. "Neonatal umbilical artery pseudoaneurysm: sonographic evaluation (case report)." American Journal of Roentgenology 147, no. 2 (August 1986): 322–24. http://dx.doi.org/10.2214/ajr.147.2.322.
Full textDissertations / Theses on the topic "Neonatal umbilical artery"
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Bombardelli, Juliana Aparecida. "Avaliação ultrassonográfica da involução dos componentes do cordão umbilical de bezerros holandeses no primeiro mês de vida: influência da concentração da tintura de iodo utilizada para a desinfecção do umbigo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/10/10136/tde-20102015-090820/.
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As afecções dos componentes umbilicais merecem destaque no período neonatal, pois são comumente encontradas nos bezerros, podendo levar a graves complicações. O diagnóstico das doenças umbilicais muitas vezes não é totalmente esclarecido pela palpação abdominal bimanual, uma vez que, em parcela dos casos, esse método semiológico não é sensível para determinar o grau de acometimento das estruturas umbilicais intra-abdominais. Assim, a ultrassonografia apresenta-se como um valioso exame complementar para o estabelecimento de um diagnóstico preciso sobre a localização e extensão das onfalopatias intra-abdominais. Diante dessas limitações e da raridade de pesquisas com estabelecimento de padrões da ultrassonografia do umbigo, a proposta desse estudo foi avaliar o processo de involução fisiológica dos componentes umbilicais de bezerros sadios, considerando o uso de antisséptico clássico, a tintura de iodo, em concentrações de 2% e 5%, usado na cura do umbigo nos primeiros dias após o nascimento. A avaliação foi realizada por meio do exame ultrassonográfico dos componentes umbilicais, em diferentes posições, caracterizando as modificações ocorridas durante o processo de involução, em relação ao aspecto das imagens, com medidas de diâmetro e espessura dos componentes vasculares e úraco, assim como às peculiaridades decorrentes dos dois tipos de desinfecção da região. Foram avaliados 23 bezerros da raça Holandesa, machos, oriundos de propriedade leiteira localizada no Estado de São Paulo, desde o nascimento até os 30 dias de vida. Os resultados obtidos, evidenciaram que a veia e as artérias umbilicais perdem as suas características de vasos, assumindo aspecto de ligamento devido à proliferação de tecido fibroso. Esse processo caracterizou-se e seguiu um padrão, no qual o tecido fibroso inicialmente estava presente na região interna da parede do vaso, seguindo, com a involução, em direção ao centro da luz vascular. Esse processo de involução é mais precoce em porções dos vasos mais distantes do umbigo externo, não havendo distinção de comportamento determinada por uso das diferentes concentrações do antisséptico. Além das imagens, foram também padronizadas as medidas do diâmetro dos componentes umbilicais e da espessura de suas paredes, ao longo do processo de involução fisiológica, durante os primeiros 30 dias de vida dos bezerros, comprovando-se a precisão do exame ultrassonográfico para essa avaliação e estabelecendo-se referências ultrassonográficas para fundamentar o diagnóstico e escolha do tratamento das onfalopatiasDiseases of the umbilical components are very important in the neonatal period. Commonly found in calves, they can lead to serious complications. Diagnosis of umbilical diseases is often not fully enlightened by bimanual abdominal palpation, since this semiotic method is not sensitive enough to determine the extent of involvement of the umbilical intra-abdominal structures in part of the cases. Thus, ultrasonography is a valuable complementary test for establishing an accurate diagnosis on the location and extent of intra-abdominal omphalitis. Because of these limitations and the scarce research on the establishment of the standards of navel ultrasound, the purpose of this study was to evaluate the physiological involution process of umbilical components of healthy calves, considering the use of classic antiseptic, iodine tincture in concentrations 2% and 5%, used in navel treatment during the first days after birth. Evaluation was performed by ultrasonography of umbilical components in different positions and the changes were characterized during the process of involution regarding the appearance of the images, the measures of the diameter and thickness of vascular and urachus components, as well as the peculiarities from the two types of disinfecting. Twenty-three Holstein male calves, reared in dairy property located in the State of São Paulo, were evaluated from birth to 30 days old. Results obtained showed that the vein and umbilical arteries lose their blood vessels characteristics, assuming a ligament aspect due to fibrous tissue proliferation. This process was characteristic and followed a pattern, in which the fibrous tissue was initially present in the inner part of the vessel wall, following with involution, toward the center of the vessel lumen. This process of involution was earlier in the parts of the blood vessels that were farthest from the external navel, with no particular behavior distinct by the use of different antiseptic concentrations. Besides the images, the measurements of the diameter of the umbilical components and the thickness of their walls were also standardized along the physiological involution process during the first 30 days of life the calf, confirming the accuracy of ultrasonography for such assessment and establishing references to improve the diagnosis and the choice of treatment of umbilical diseases
Books on the topic "Neonatal umbilical artery"
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Jacquemyn, Yves, and Anneke Kwee. Antenatal and intrapartum fetal evaluation. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198713333.003.0006.
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Antenatal and intrapartum fetal monitoring aim to identify the beginning of the process of fetal hypoxia before irreversible fetal damage has taken place. Fetal movement counting by the mother has not been reported to be of any benefit. The biophysical profile score, incorporating ultrasound and fetal heart rate monitoring, has not been proven to reduce perinatal mortality in randomized trials. Doppler ultrasound allows the exploration of the perfusion of different fetal organ systems and provides data on possible hypoxia and fetal anaemia. Maternal uterine artery Doppler can be used to select women with a high risk for intrauterine growth restriction and pre-eclampsia but does not directly provide information on fetal status. Umbilical artery Doppler has been shown to reduce perinatal mortality significantly in high-risk pregnancies (but not in low-risk women). Adding middle cerebral artery Doppler to umbilical artery Doppler does not increase accuracy for detecting adverse perinatal outcome. Ductus venosus Doppler demonstrates moderate value in diagnosing fetal compromise; it is not known whether its use adds any value to umbilical artery Doppler alone. Cardiotocography (CTG) reflects the interaction between the fetal brain and peripheral cardiovascular system. Prelabour routine use of CTG in low-risk pregnancies has not been proven to improve outcome; computerized CTG significantly reduces perinatal mortality in high-risk pregnancies. Monitoring the fetus during labour with intermittent auscultation has not been compared to no monitoring at all; when compared with CTG no difference in perinatal mortality or cerebral palsy has been noted. CTG does lower neonatal seizures and is accompanied by a statistically non-significant rise in caesarean delivery. Fetal blood sampling to detect fetal pH and base deficit lowers caesarean delivery rate and neonatal convulsions when used in adjunct to CTG. Determination of fetal scalp lactate has not been shown to have an effect on neonatal outcome or on the rate of instrumental deliveries but is less often hampered by technical failure than fetal scalp pH. Analysis of the ST segment of the fetal ECG (STAN®) in combination with CTG during labour results in fewer vaginal operative deliveries, less need for neonatal intensive care, and less use of fetal blood sampling during labour, without a change in fetal metabolic acidosis when compared to CTG alone.
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Soghier, Lamia, Katherine Pham, and Sara Rooney, eds. Reference Range Values for Pediatric Care. American Academy of Pediatrics, 2014. http://dx.doi.org/10.1542/9781581108545.
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Here’s the one place to look for normal values and related need-to-know data! Now you no longer have to search through multiple resources for reference ranges and other critical values you need to optimize patient assessment and management. The new Reference Range Values for Pediatric Care brings all the most vital range data - plus diverse clinical evaluation and calculation tools - all together in one concise, compact handbook. Indispensable pediatric reference ranges - right at your fingertips Custom-designed for today’s busy practitioners, this quick-access resource provides commonly used ranges and values spanning birth through adolescence. Data needed for management of preterm newborns and other neonates is highlighted throughout. Look here for practice-focused help with: - Blood pressure ranges - Body surface area calculation - Bone age metrics - Hematology values - Cerebrospinal fluid values - Lymphocyte subset counts - Clinical chemistry ranges - Thyroid function - Umbilical vein and artery catheterization measurements - Caloric intake values - And more! Also includes assessment and management tools you’ll use again and again Save time and simplify clinical problem-solving with a full set of easy-to-use tools from the AAP and other authoritative sources: - APGAR and Ballard newborn screening - Growth charts - Metric conversion tables - Pain scales - Blood pressure nomograms - Hyperbilirubinemia nomograms - Enternal formulas - GIR calculators - AAP immunization schedules - AAP periodicity schedule Drug administration and monitoring guidelines The handbook includes must-know basics on commonly used antibiotics and antiseizure medications - complete with recommended dosages and serum target levels.
Book chapters on the topic "Neonatal umbilical artery"
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Sinha, Rahul. "Umbilical Artery and Venous Catheterization." In Manual of Neonatal Procedures, 18. Jaypee Brothers Medical Publishers (P) Ltd., 2016. http://dx.doi.org/10.5005/jp/books/12796_4.
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"Emergent Umbilical Vein/Umbilical Artery Catheter Placement." In Field Guide for Air and Ground Transport of Neonatal and Pediatric Patients: A Quick Reference for Transport Teams, 95–96. American Academy of Pediatrics, 2018. http://dx.doi.org/10.1542/9781610021937-part05-emergent.
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King, Michael R., Ramesh Kodavatiganti, and Hubert A. Benzon. "Arterial Line Placement." In Ultrasound Guided Procedures and Radiologic Imaging for Pediatric Anesthesiologists, edited by Anna Clebone, Joshua H. Finkle, and Barbara K. Burian, 37–54. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780190081416.003.0005.
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Chapter 5 covers the fundamentals and techniques of arterial line placement, including the palpation technique, ultrasound guided arterial line placement, and the cutdown technique. Arterial line placement involves inserting a catheter into a peripheral artery, most commonly the radial or femoral artery. Arterial lines provide beat-to-beat blood pressure monitoring as well as a readily available means of obtaining blood samples to check arterial blood gas measurements and other labs. Cannulation of the ulnar, brachial, axillary, posterior tibial, dorsalis pedis, and umbilical (in neonates) arteries has also been described, although these sites may be higher risk. Although the techniques described in this chapter focus on the radial, femoral, and posterior tibial approaches, many of the general principles apply to the other arteries as well.
Conference papers on the topic "Neonatal umbilical artery"
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Nye, Kevin S., M. Sean Esplin, and Kenneth L. Monson. "Umbilical Cord Artery Mechanical Properties in Pre-Term Neonates at Various Ages." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80484.
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Premature and very low birthweight (VLBW) infants are susceptible to numerous injuries during, and after parturition. If these injuries are neurological in nature, they can result in long-term cognitive and motor skill deficiencies. Cerebral hemorrhaging is a disease that has disastrous consequences on preterm and VLBW infants, and the mechanism for this type of hemorrhaging is currently not known. Bleeding in the ventricle region of the brain is termed intraventricular hemorrhage (IVH) and occurs in 32% of infants with birth weights less than 1500 grams and born prior to 32 weeks gestation[1]; 75% of these will experience long-term neurological disabilities[2]. A lack of tissue structure of the cerebral vasculature in early stages of development is a possible underlying cause for such high occurrences of IVH[3,4,5]. Mechanical characterization of neonatal vasculature could show structural underdevelopment as the underlying cause of IVH and provide valuable insight into neonatal vascular development. We previously characterized the mechanical properties of whole umbilical cord arteries and found a correlation between vessel stiffness and gestational age[6]. Considerations of the helical structure of late term umbilical cord vessels prompted a revisit of the characterization of the vessels with altered testing methods. To negate the effects of the vessels’ tortuous structure on stiffness values, we tested axial and circumferential small strips of human umbilical cord artery at various gestational time.
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Kappel, A., and D. Orbach. "E-078 Standard umbilical artery catheters used as diagnostic and neurointerventional guide catheters in the treatment of neonatal cerebrovascular malformations." In SNIS 19th Annual Meeting Abstracts. BMA House, Tavistock Square, London, WC1H 9JR: BMJ Publishing Group Ltd., 2022. http://dx.doi.org/10.1136/neurintsurg-2022-snis.189.
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