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Relevant bibliographies by topics / Vacuum assisted delivery

Academic literature on the topic 'Vacuum assisted delivery'

Author: Grafiati

Published: 8 June 2024

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Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Journal articles on the topic "Vacuum assisted delivery":

1

Williams, Mark C. "Vacuum-Assisted Delivery." Clinics in Perinatology 22, no. 4 (December 1995): 933–52. http://dx.doi.org/10.1016/s0095-5108(18)30263-x.

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Vacca, Aldo. "Vacuum-assisted delivery." Best Practice & Research Clinical Obstetrics & Gynaecology 16, no. 1 (February 2002): 17–30. http://dx.doi.org/10.1053/beog.2001.0252.

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Vacca, A. "I354 Vacuum assisted delivery." International Journal of Gynecology & Obstetrics 107 (October 2009): S88. http://dx.doi.org/10.1016/s0020-7292(09)60354-4.

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McQuivey, RW. "Vacuum-assisted delivery: a review." Journal of Maternal-Fetal & Neonatal Medicine 16, no. 3 (September 1, 2004): 171–80. http://dx.doi.org/10.1080/jmf.16.3.171.180-25.

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RW, McQuivey. "Vacuum-assisted delivery: a review." Journal of Maternal-Fetal and Neonatal Medicine 16, no. 3 (September 1, 2004): 171–80. http://dx.doi.org/10.1080/1476-7050400001706.

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B., Jeyamani, and Nashreen Dhasleema A. "Fetomaternal outcome in operative vaginal delivery." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 10, no. 11 (October 27, 2021): 4096. http://dx.doi.org/10.18203/2320-1770.ijrcog20214314.

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Background: Operative vaginal deliveries (OVD) were performed with the help of vacuum or forceps in the second stage of labor when mother and foetus condition is threatening. A successful assisted vaginal delivery avoids caesarean section and its associated morbidity and implications for future pregnancy. The aim of the study was to assess the maternal and neonatal outcome of vacuum and forceps assisted vaginal deliveries.Methods: It was a retrospective comparative cross sectional study done in VMKVMCH, Salem in obstetrics and gynecology department, from the period of April to June 2021. All the mothers delivered by operative vaginal delivery were included. Mothers with multiple pregnancies, preterm and breech presentation were excluded. Data collected using patients information sheet and analysis was done using SPSS 23. P value <0.05 was considered significant.Results: The most common age group was 21-25 years of age in both groups and most commonly used in primigravida. The most common indication for forceps assisted delivery in our study was the prolonged second stage labour and in vacuum delivery was poor maternal effort. In our study, common complication noted was extended episiotomy followed by perineal tear in forceps group and vice versa in vacuum group. Cephalhematoma was found to be more common in vacuum and scalp and instrumental injuries were more common in forceps assisted vaginal deliveries.Conclusions: Operative vaginal deliveries helps in improving both maternal and foetal outcomes and reduces the caesarean delivery rate and vacuum significantly reduces maternal trauma than forceps. No difference noted in neonatal outcome.

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Swain, Sujata, N. Sagarika, Rabi N. Satpathy, and Purna C. Mahapatra. "Assisted delivery of mobile fetal head: a comparison of forceps, vaccum and assisted manual extraction of head at caesarean section." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 6, no. 9 (August 28, 2017): 4065. http://dx.doi.org/10.18203/2320-1770.ijrcog20174063.

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Background: Difficult fetal extraction occurs in 1-2% of caesarean deliveries. Either forceps or a vaccum device is often used to assist in delivery of the fetal head in cesarean section in high floating/mobile fetal head. This study compare the safety (for mother and fetus) and efficacy of forceps and vacuum assisted delivery of high floating/mobile fetal head with the traditional method of manual extraction at caesarean section.Methods: The sample size included 100 cases of LSCS with manual extraction of fetal head, 100 cases of LSCS with forceps assisted extraction of fetal head and 100 cases of LSCS with vacuum assisted extraction of fetal head.Results: Application of fundal pressure was required in all cases of manual extraction group, in 51 cases of forceps extraction group. None of the cases of vacuum extraction group required application of fundal pressure. The U-D interval in manual extraction group was 90.56±4.91 seconds, in forceps extraction group was 70.2±5.02 seconds and in the vacuum extraction group it was 62.3±2.03 seconds. In the manual extraction group, there was an estimated blood loss of 428±69.38 ml, 579±97.22 ml of estimated blood loss was present in forceps extraction group and in the vacuum extraction group it was 454±66.92 ml.Conclusions: This study reveals that with use of vacuum in CS for delivery of floating head, is superior than application of forceps and manual delivery in relation to time, blood loss and fundal pressure without any adverse effect on neonates and maternal complication.

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Simonson, Colin, Patricia Barlow, Nathalie Dehennin, Marianne Sphel, Véronique Toppet, Daniel Murillo, and Serge Rozenberg. "Neonatal Complications of Vacuum-Assisted Delivery." Obstetrics & Gynecology 109, no. 3 (March 2007): 626–33. http://dx.doi.org/10.1097/01.aog.0000255981.86303.2b.

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Vacca, Aldo. "Neonatal Complications of Vacuum-Assisted Delivery." Obstetrics & Gynecology 110, no. 1 (July 2007): 189. http://dx.doi.org/10.1097/01.aog.0000269870.95850.39.

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Simonson, Colin, Patricia Barlow, Nathalie Dehennin, Marianne Sphel, Veronique Toppet, Daniel Murillo, and Serge Rozenberg. "Neonatal Complications of Vacuum-Assisted Delivery." Obstetrics & Gynecology 110, no. 1 (July 2007): 189. http://dx.doi.org/10.1097/01.aog.0000269875.51861.f3.

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Dissertations / Theses on the topic "Vacuum assisted delivery":

1

Vallet, Yves. "Contribution à la caractérisation et à la modélisation de l'accouchement instrumenté par ventouse." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0134.

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Lors d'un accouchement par voie basse, la phase d'expulsion est une période où les risques de complications maternelles et fœtales sont élevées. Les praticiens peuvent être amenés à réaliser une extraction instrumentale par ventouse (EIV) obstétricale. Comme tout instrument d'extraction, son utilisation comporte des risques en cas de pratique inadaptée, pour la mère comme pour le bébé. En ce qui concerne le bébé, les différentes couches du scalp sont, en effet, hautement sollicitées, ce qui peut engendrer quelques rares complications, telles que : des bosses sero-sanguines, des céphalohématomes ou des hémorragies sous-galéales. Afin de limiter ces risques, les praticiens doivent être formés à l'utilisation de la ventouse et doivent respecter les recommandations en vigueur. Cependant, les paramètres liés à son utilisation comme l'amplitude de la force de traction, le placement de la ventouse ou encore le geste d'extraction, restent opérateur-dépendant. Une meilleure compréhension des paramètres physiques et mécaniques mis en jeux lors d'une EIV est alors nécessaire afin de faire évoluer cette pratique. Pour répondre à cet objectif, ce travail de thèse est construit en deux axes qui correspondent à deux échelles distinctes, et qui présentent des aspects expérimentaux et numériques. Le premier, à l'échelle macroscopique, il prend en compte le fœtus dans son environnement. Le deuxième, à une échelle plus mésoscopique des tissus fœtaux, il considère la tête du bébé isolée dans son environnement. Les travaux du premier axe ont permis de faire l'acquisition du geste des praticiens sur un mannequin d'entraînement et de mettre en place un jumeau numérique de cet outil didactique, afin d'investiguer les différents paramètres de l'EIV. Pour le deuxième axe, les travaux de thèse ont permis de mettre au point une modélisation de l'interaction peau/os du scalp. Un modèle numérique qui utilise une modélisation "fine" de la tête fœtale a ensuite été implémenté et mis en œuvre pour l'investigation des paramètres de l'EIV. Des perspectives d'améliorations des travaux des deux axes sont finalement proposées en fin de manuscrit. De manière connexe, une revue de littérature sur les ventouses présentes dans la nature permet d'ouvrir des perspectives prometteuses en vue de l'évolution du design des ventouses obstétricales actuellement utilisées
During vaginal delivery, the expulsion phase is associated with risks of maternal and fetal complication. Practitioners may need to perform a vacuum assisted delivery (VAD). As with any operational instrument, there are risks associated with its use, for the baby and the mother, if it is not carried out correctly. For the fetus, the various layers of the scalp are solicited with great strain, which can lead to rare complications such as caput succedaneum, cephalohaematomas and subgaleal haemorrhage. To limit these risks, practitioners must be trained to use suction cups, and must comply with current recommendations. However, the parameters associated with its use, such as the amplitude of the traction force, the placement of the suction cup and the extraction procedure, remain operator-dependent. A better understanding of the physical and mechanical parameters involved in VAD is therefore needed to improve this practice. In order to achieve this objective, this thesis is structured around two axes, corresponding to two different scales and including experimental and numerical work. The first, at the macroscopic scale, considers the fetus in its environment. The second, at the mesoscopic scale, considers the isolated fetal head within its environment. The work of the first part has allowed to capture gesture of the the practitioners on a training dummy and to create a digital twin of this didactic tool in order to study the various parameters of VAD. In the second part, the work has led to the development of a model of the interaction between the scalp's skin and skull. A numerical model was then designed and implemented using a refined" modelling of the fetal head to study the parameters of the VAD. In parallel, a review of the literature on suction cups found in nature open up promising prospects for the evolution of the obstetric suction cup design used nowadays

2

Estêvão, Ana Beatriz Chorão. "Vacuum-assisted vaginal delivery: a biomechanical study." Master's thesis, 2021. https://hdl.handle.net/10216/135566.

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Estêvão, Ana Beatriz Chorão. "Vacuum-assisted vaginal delivery: a biomechanical study." Dissertação, 2021. https://hdl.handle.net/10216/135566.

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Books on the topic "Vacuum assisted delivery":

1

Laufe, Leonard E. Assisted vaginal delivery: Obstetric forceps and vacuum extraction techniques. New York: McGraw-Hill, Health Professions Division, 1992.

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2

Laufe, Leonard E. Assisted vaginaldelivery: Obstetric forceps and vacuum extraction techniques. New York: McGraw-Hill, 1992.

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Book chapters on the topic "Vacuum assisted delivery":

1

Crescini, Claudio, Antonio Ragusa, and Alessandro Svelato. "Prevention of Perineal Trauma During Vacuum-Assisted Vaginal Delivery." In Intrapartum Ultrasonography for Labor Management, 743–50. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57595-3_58.

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Tuggy, Michael, and Jorge Garcia. "Vacuum-Assisted Delivery." In Atlas of Essential Procedures, 64–67. Elsevier, 2011. http://dx.doi.org/10.1016/b978-1-4377-1499-9.00016-9.

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3

Jacob, Annamma. "Ventouse Delivery (Vacuum Assisted Birth)." In Manual of Midwifery, 448. Jaypee Brothers Medical Publishers (P) Ltd., 2009. http://dx.doi.org/10.5005/jp/books/10473_14.

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"Operative Delivery Procedure 1: Vacuum-Assisted Vaginal Delivery." In Obstetrics and Gynecology: A Competency-Based Companion, 526. Elsevier, 2010. http://dx.doi.org/10.1016/b978-1-4160-4896-1.00172-6.

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5

Cheng, Yvonne Kwan Yue, and Tak Yeung Leung. "Obstetric procedures." In Oxford Textbook of Obstetrics and Gynaecology, edited by Sabaratnam Arulkumaran, William Ledger, Lynette Denny, and Stergios Doumouchtsis, 407–21. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198766360.003.0033.

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Abstract:

Human childbirth is a natural process but it is not always smooth and successful. Hence, several important obstetric surgical procedures and instruments were invented to assist difficult childbirth, such as caesarean section, forceps and vacuum vaginal delivery, external cephalic version, and vaginal breech delivery. The indications, the procedures, and the complications of these commonly practised obstetric surgeries are reviewed in this chapter. Other commonly performed procedures for normal labour such as episiotomy, repair of perineal tear, routine controlled cord traction for the delivery of the placenta in the third stage of labour, and manual removal of retained placenta will also be discussed.

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Scott, Phillip, and Jeffrey Riley. "Perfusion Considerations." In Mechanical Circulatory Support, 188–94. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190909291.003.0025.

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The effects of hemodilution during cardiopulmonary bypass (CPB) negatively impact a patient’s hemodynamic and coagulopathic states throughout all operative stages and into the postoperative care environment. Decisions by the surgical team to minimize fluid administration prove beneficial, and combining contemporary perfusion circuit prime reduction techniques, such as body mass index (BMI) correction, venous autologous priming (VAP), retrograde autologous priming (RAP), and antegrade prime displacement, greatly enables efforts of maintaining proper colloidal osmotic pressures (COP) while maximizing delivery of oxygen (DO2) during CPB. Adjuncts such as ultrafiltration (UF), use of vacuum assist venous drainage (VAVD), hyper-osmotic/oncotic solutions administration, and proportional volume replacement better prepare a patient for post-bypass management. Minimizing hemodilution tools facilitates transition onto mechanical circulatory support (MCS) devices such as extracorporeal membrane oxygenation (ECMO) and/or right or left ventricular assist device (RVAD/LVAD). Avoiding heparin rebound and dilutional coagulopathy in the intensive care unit further prevents additional blood product transfusions.

Conference papers on the topic "Vacuum assisted delivery":

1

Fuqua, Michael, and James L. Glancey. "A Port Injection Process for Improved Resin Delivery and Flow Control in Vacuum-Assisted Resin Transfer Molding." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14422.

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Vacuum Assisted Resin Transfer Molding (VARTM) is used to produce high quality composite parts at lower cost than other manufacturing methods. However, traditional VARTM injection methods are incapable of accounting for variations in preform permeability within a mold. As a result, creating complex components is a labor intensive and expensive process often requiring a trial and error approach to insure complete infusion of the preform fibers. To address this limitation, a new system for delivering resin to a VARTM mold using a series of ports in the tooling surface rather than traditional injection lines has been developed. A port injection process has been designed that utilizes a closed loop control system of ports and sensors built into the mold. Finite element models of this new process indicate complete infusion can consistently be achieved, even for mold lay-ups with large variations in permeability. Results indicate the system is capable of identifying and accounting for preform variability, and correctly delivering resin to low permeability regions usually unfilled with conventional VARTM. In addition, this new technique significantly reduces lay-up time and total time to infuse a part. Experiments with a prototype lab-scale mold have been used to validate the performance of this new injection process. Unlike a conventional VARTM setup, the innovative port injection process can deliver resin to any location within the mold, thus reducing the potential for dry regions and improving part quality and consistency.

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Rue, C., S. Herschbein, C. Scrudato, L. Fischer, and A. Shore. "Optimizing Gas-Assisted FIB Processes: The Importance of Oft-Ignored Secondary Parameters." In ISTFA 2004. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.istfa2004p0527.

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Abstract The efficiency of Gas-Assisted Etching (GAE) and depositions performed using the Focused Ion Beam (FIB) technique is subject to numerous factors. Besides the wellknown primary parameters recommended by the FIB manufacturer (pixel spacing, dwell time, and gas pressures), certain secondary factors can also have a pronounced effect on the quality of these gas-assisted FIB operations. The position of the gas delivery nozzle during XeF2 mills on silicon is examined and was found to affect both the milling speed and the texture on the floor of the FIB trench. Limitations arising from the memory capacity of the FIB computer can also influence process times and trench quality. Exposing the FIB vacuum chamber to TMCTS during SiO2 depositions is found to temporarily impede the performance of subsequent tungsten depositions, especially following heavy or prolonged TMCTS exposure. A delay period may be required to achieve optimal tungsten depositions following TMCTS use. Finally, the focusing conditions of the ion beam are found to have a significant impact on the resistance of FIB-deposited metal films. This effect is attributed to partial milling of the deposition film due to the intense current density of the collimated ion beam. The resistances of metal depositions performed with intentionally defocused ion beams were found to be lower than those performed with focused beams.

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Correia, N. C., F. Robitaille, A. C. Long, C. D. Rudd, P. Sˇima´cˇek, and S. G. Advani. "Use of Resin Transfer Molding Simulation to Predict Flow, Saturation and Compaction in the VARTM Process." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39696.

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Vacuum Assisted Resin Transfer Molding (VARTM) and Resin Transfer Molding (RTM) are among the most significant and widely used Liquid Composite manufacturing processes. In RTM preformed-reinforcement materials are placed in a mold cavity, which is subsequently closed and infused with resin. RTM numerical simulations have been developed and used for a number of years for gate assessment and optimization purposes. Available simulation packages are capable of describing/predicting flow patterns and fill times in geometrically complex parts manufactured by the resin transfer molding process. Unlike RTM, the VARTM process uses only one sided molds (tool surfaces) where performs are placed and enclosed by a sealed vacuum bag. To improve the delivery of the resin, a distribution media is sometimes used to cover the preform during the injection process. Attempts to extend the usability of the existing RTM algorithms and software packages to the VARTM domain have been made but there are some fundamental differences between the two processes. Most significant of these are 1) the thickness variations in VARTM due to changes in compaction force during resin flow 2) fiber tow saturation, which may be significant in the VARTM process. This paper presents examples on how existing RTM filling simulation codes can be adapted and used to predict flow, thickness of the preform during the filling stage and permeability changes during the VARTM filling process. The results are compared with results obtained from an analytic model as well as with limited experimental results. The similarities and differences between the modeling of RTM and VARTM process are highlighted.

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"Life-Cycle Monitoring of CFRP using Piezoelectric Sensors Network." In Structural Health Monitoring. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901311-15.

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Abstract. Vacuum Assisted Resin Infusion (VARI) process is suitable for manufacturing complex large-scale composite structures and has the potential for low cost and mass production. However, the inappropriate process parameters such as incomplete resin flow and the uneven cure occurred will lead to some defects such as dry spots and delamination. In the present work, the concept of Networked Elements for Resin Visualization and Evaluation (NERVE) with the piezoelectric lead-zirconate-titanate (PZT) sensors as the base unit was used to monitor the internal state of composite struture during its life-time. The capability of PZT sensors in the NERVE to monitor two important parameters during the manufacturing process including the flow front of resin and progress of reaction (POR), was investigated. The Lamb waves generated by PZT, propagating in the mold/composite, was used to measure the parameters. The resin flow front was analyzed using optical detection at the same time. The flow front position over time and the influence of the length of sensing path covered by resin were delivered. The effects of different resin cure state on Lamb signal attenuation and energy leakage were also obtained. The change of amplitude was integrated to get the POR curves, so the resin cure state could be also monitored. After the composite was demoulded, the network was used contiously to identify the artifical damages with the fused probability-based diagnostic imaging (PDI). Experimental results indicate that the NERVE has the ability to realize the full life-cycle health monitoring of composite structures.