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Fetal head molding

A Jensen, E Hamelmann
Intracranial laceration due to traumatic birth injury is an extremely rare event affecting approximately one newborn per a population of 4.5 million. However, depending on the mode of injury, the resulting brain damage may lead to lifelong sequelae, for example, cerebral palsy for which there is no cure at present. Here we report a rare case of neonatal arterial ischemic stroke and cerebral palsy caused by fetal traumatic molding and parietal depression of the head during delivery caused by functional cephalopelvic disproportion due to a "long pelvis...
2016: Case Reports in Transplantation
Christian Bamberg, Jan Deprest, Nikhil Sindhwani, Ulf Teichgräberg, Felix Güttler, Joachim W Dudenhausen, Karim D Kalache, Wolfgang Henrich
AIM: Fetal skull molding is important for the adaptation of the head to the birth canal during vaginal delivery. Importantly, the fetal head must rotate around the maternal symphysis pubis. The goals of this analysis were to observe a human birth in real-time using an open magnetic resonance imaging (MRI) scanner and describe the fetal head configuration during expulsion. METHODS: Real-time cinematic MRI series (TSE single-shot sequence, TR 1600 ms, TE 150 ms) were acquired from the midsagittal plane of the maternal pelvis during the active second stage of labor at 37 weeks of gestation...
May 24, 2016: Journal of Perinatal Medicine
Paige V Tracy, John O DeLancey, James A Ashton-Miller
Because levator ani (LA) muscle injuries occur in approximately 13% of all vaginal births, insights are needed to better prevent them. In Part I of this paper, we conducted an analysis of the bony and soft tissue factors contributing to the geometric "capacity" of the maternal pelvis and pelvic floor to deliver a fetal head without incurring stretch injury of the maternal soft tissue. In Part II, we quantified the range in demand, represented by the variation in fetal head size and shape, placed on the maternal pelvic floor...
February 2016: Journal of Biomechanical Engineering
M E T Silva, D A Oliveira, T H Roza, S Brandão, M P L Parente, T Mascarenhas, R M Natal Jorge
Pelvic floor injuries during vaginal delivery are considered a significant risk factor to develop pelvic floor dysfunction. The molding of the fetus head during vaginal delivery facilitates the labor progress, since it adjusts to the birth canal geometry. In this work, a finite element model was used to represent the effects induced by the passage of the fetus head on the pelvic floor. The numerical model used for this simulation included the pelvic floor muscles attached to the bones, and a fetus body. The model of the fetus head included the skin and soft tissues, the skull with sutures and fontanelles, and the brain...
June 25, 2015: Journal of Biomechanics
Wayne R Cohen, Emanuel A Friedman
Recent guidelines issued jointly by the American College of Obstetricians and Gynecologists and the Society for Maternal-Fetal Medicine for assessing labor progress differ substantially from those described initially by Friedman, which have guided clinical practice for decades. The guidelines are based on results obtained from new and untested methods of analyzing patterns of cervical dilatation and fetal descent. Before these new guidelines are adopted into clinical practice, the results obtained by these unconventional analytic approaches should be validated and shown to be superior, or at least equivalent, to currently accepted standards...
April 2015: American Journal of Obstetrics and Gynecology
Elizabeth A Moffett, Kristina Aldridge
The anterior fontanelle (AF) is an integral element of the developing human infant craniofacial system. Consideration of the AF is crucial for assessing craniofacial growth, as altered development of this feature may indicate abnormal growth. Moreover, prolonged patency of the AF may represent a derived hominin feature. The AF is regarded as essential for fetal head molding during birth in humans, with deformation of the head during birth often necessary for successful delivery. However, the function of a patent AF among fossil hominins is unclear...
February 2014: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
Fang Pu, Liqiang Xu, Deyu Li, Shuyu Li, Lianwen Sun, Ling Wang, Yubo Fan
Fetal head molding is important for adapting the fetal head to the birth canal during vaginal delivery; however, excessive deformation of fetal head may lead to severe complications. Although labor force is one of the major factors which cause deformation of the fetal head, its effect on fetal head molding has not been quantitatively investigated yet. We examined this effect by using a finite element modeling approach. Firstly, a geometric model was created by scanning a polyethylene replica of fetal skull model with a white light three-dimensional scanner...
June 2011: Medical Engineering & Physics
Chang Keun Oh, Soo Han Yoon
Vaginal delivery is accomplished by the force of the labor overcoming the resistance forces of birth canal. During this process, the fetal head passes through the birth canal and the skull receives pressure on the lateral aspect, resulting in molding, the convex shaping of the cranium. Also, the infant's skull is compressed by the mother's pelvic bony structures. These forces may lead to skull fractures and brain injuries. The hypothesis by the authors is that many skull fractures of the newborn present as incomplete fractures...
May 2010: Medical Hypotheses
Kuo-Cheng Lien, John O L DeLancey, James A Ashton-Miller
OBJECTIVE: To develop and use a biomechanical computer model to simulate the effect of varying the timing of voluntary maternal pushes during uterine contraction on second-stage labor duration. METHODS: Published initial pelvic floor geometry was imported into technical computing software to build a simplified three-dimensional biomechanical model with six representative viscoelastic levator muscle bands interconnected by a hyperelastic iliococcygeal raphe. An incompressible sphere simulated the molded fetal head...
April 2009: Obstetrics and Gynecology
Travis T Tollefson, Craig W Senders, Jonathan M Sykes
Cleft lip and palate deformities are the most common congenital abnormalities of the head and neck. Advancements in the various multidisciplinary fields involved in cleft management have substantially improved functional and aesthetic outcomes. The legitimacy of such controversial topics as gingivoperiosteoplasty, primary rhinoplasty, and presurgical nasoalveolar molding is heavily contested. Bone morphogenetic protein and other recombinant growth factors may play important roles in future cleft care. As the candidate alleles that contribute to cleft lip and palate are further elucidated, the complex interplay of environmental influence and genetic predisposition is emphasized...
November 2008: Archives of Facial Plastic Surgery
Eckhart J Buchmann, Elena Libhaber
OBJECTIVE: To determine the role of assessment of overlap of fetal skull bones (molding) in intrapartum prediction of cephalopelvic disproportion (CPD). DESIGN: Prospective cross-sectional study. SETTING: South African high-risk obstetric unit that receives referrals from other facilities. POPULATION: Women of at least 37 weeks' gestation in the active phase of labor, with singleton vertex presentations and live fetuses, and without previous cesarean sections...
2008: Acta Obstetricia et Gynecologica Scandinavica
K C McCrae, T G Rand, R A Shaw, H H Mantsch, M G Sowa, J A Thliveris, J E Scott
Stachybotrys chartarum (atra) is a toxic mold that grows on water-damaged cellulose-based materials. Research has revealed also that inhalation of S. chartarum spores caused marked changes in respiratory epithelium, especially to developing lungs. We analyzed the epigenetic potential of S. chartarum spore toxins on developing rat lung fibroblasts using single cell gel electrophoresis (comet assay). Isolated fetal lung fibroblasts were exposed to S. chartarum spore toxins for 15 min, 3, 14, or 24 hr and control cells were exposed to saline under the same conditions...
July 2007: Pediatric Pulmonology
No abstract text is available yet for this article.
September 1958: Geburtshilfe und Frauenheilkunde
A Dimitrov, K Krŭsteva, A Nikolov, M Tsankova, S Nashar
UNLABELLED: The aim of this prospective study is to assess the effect of non indicated supplementation with Materna during normal pregnancy on some parameters of the neonate and the process of delivery. The material includes 98 women who had been taking Materna during the pregnancy and 27 cases without any medications. The criteria for inclusion are: normally progressing clinically and paraclinically pregnancy and delivery after completing 37th w.g. (95% confident interval 39.0-40.5)...
2002: Akusherstvo i Ginekologii︠a︡
D Krakow, T Santulli, L D Platt
No abstract text is available yet for this article.
April 2001: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
J P Bradley, H Shahinian, J P Levine, N Rowe, M T Longaker
Newborns with in utero cranial vault molding can present with severe forms of plagiocephaly. Intrauterine constraint has been proposed as one cause for craniosynostosis. The purpose of this experiment was to investigate whether rigid plate fixation across a fetal cranial suture, representing a severe form of growth restriction in utero, would lead to cranial suture fusion in a fetal lamb model. Six fetal lambs at 85 to 95 days gestation (term = 145 days) underwent laparotomy, hysterotomy, fetal coronal scalp incision, and miniplate screw fixation across the right coronal suture in utero...
June 2000: Plastic and Reconstructive Surgery
H Asakura, B S Schifrin, S A Myers
BACKGROUND: Intracranial hemorrhage in a full-term infant is uncommon, is usually subarachnoid in type, and is usually associated with operative vaginal delivery or asphyxia. CASE: A 15-year-old primigravid woman at 37 weeks' gestation developed a prolonged second stage of labor associated with persistent occiput posterior position. With the onset of pushing, baseline fetal heart rate (FHR) decreased and variability increased. Thirty minutes before vaginal delivery, sudden fetal tachycardia (up to 210 beats per minute) was observed, with absent variability and minimal decelerations...
October 1994: Obstetrics and Gynecology
L Lipsitz, D Powell, S Bursian, D Tanaka
Previous investigators have reported that exposure to a mixture of environmental contaminants, including polychlorinated biphenyls, results in morphologic asymmetry of the cerebral hemispheres in hatchling great blue herons (Ardea herodias) and have suggested that this asymmetry may be a useful biomarker for contamination. This study was made to determine whether exposure to PCB congeners 3,3',4,4'-tetrachlorobiphenyl (IUPAC #77) and 3,3',4,4',5-pentachlorobiphenyl (IUPAC #126) causes similar asymmetry in hatchling domestic chickens (Gallus domesticus)...
May 1997: Archives of Environmental Contamination and Toxicology
G K McPherson, T J Kriewall
No abstract text is available yet for this article.
1980: Journal of Biomechanics
G K McPherson, T J Kriewall
No abstract text is available yet for this article.
1980: Journal of Biomechanics
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