Relevant bibliographies by topics / Rupture prematuree

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Academic literature on the topic 'Rupture prematuree'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Rupture prematuree"

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Park, Jaechan, Wonsoo Son, Ki-Su Park, Dong-Hun Kang, and Im Hee Shin. "Intraoperative premature rupture of middle cerebral artery aneurysms: risk factors and sphenoid ridge proximation sign." Journal of Neurosurgery 125, no. 5 (November 2016): 1235–41. http://dx.doi.org/10.3171/2015.10.jns151586.

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OBJECTIVE This study was an investigation of surgical cases of a ruptured middle cerebral artery (MCA) aneurysm that was conducted to identify the risk factors of an intraoperative premature rupture. METHODS Among 927 patients with a ruptured intracranial aneurysm who were treated over an 8-year period, the medical records of 182 consecutive patients with a ruptured MCA aneurysm were examined for cases of a premature rupture, and the risk factors were then investigated. The risk factors considered for an intraoperative premature rupture of an MCA aneurysm included the following: patient age; sex; World Federation of Neurosurgical Societies clinical grade; modified Fisher grade; presence of an intracerebral hemorrhage (ICH); location of the ICH (frontal or temporal); volume of the ICH; maximum diameter of the ruptured MCA aneurysm; length of the preaneurysmal M1 segment between the carotid bifurcation and the MCA aneurysm; and a sign of sphenoid ridge proximation. The sphenoid ridge proximation sign was defined as a spatial proximation < 4 mm between the sphenoid ridge and the rupture point of the MCA aneurysm, such as a daughter sac, irregularity, or dome of the aneurysm, based on the axial source images of the brain CT angiography sequences. RESULTS A total of 11 patients (6.0%) suffered a premature rupture of the MCA aneurysm during surgery. The premature rupture occurrences were classified according to the stage of the surgery, as follows: 1) craniotomy and dural opening (n = 1); 2) aspiration or removal of the ICH (n = 1); 3) retraction of the frontal lobe (n = 1); 4) dissection of the sphenoid segment of the sylvian fissure to access the proximal vessel (n = 4); and 5) perianeurysmal dissection (n = 4). The multivariate analysis with a binary logistic regression revealed that presence of a sphenoid ridge proximation sign (p < 0.001), presence of a frontal ICH associated with the ruptured MCA aneurysm (p = 0.019), and a short preaneurysmal M1 segment (p = 0.043) were all statistically significant risk factors for a premature rupture. Plus, a receiver operating characteristic curve analysis revealed that a preaneurysmal M1 segment length ≤ 13.3 mm was the best cutoff value for predicting the occurrence of a premature rupture (area under curve 0.747; sensitivity 63.64%; specificity 81.66%). CONCLUSIONS Patients exhibiting a sphenoid ridge proximation sign, the presence of a frontal ICH, and/or a short preaneurysmal M1 segment are at high risk for an intraoperative premature rupture of a MCA aneurysm. Such high-risk MCA aneurysms have a superficial location close to the arachnoid in the sphenoidal compartment of the sylvian fissure and have a rupture point directed anteriorly.
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Agrawal, Vinita. "Premature Rupture of Membranes-Clinico Epidemiological Perspective." Journal of Medical Science And clinical Research 04, no. 12 (December 31, 2016): 15130–37. http://dx.doi.org/10.18535/jmscr/v4i12.134.

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Fitriyani, Fitriyani. "FAKTOR DETERMINAN PADA KETUBAN PECAH DINI." JURNAL MEDIA KESEHATAN 11, no. 1 (November 16, 2018): 053–61. http://dx.doi.org/10.33088/jmk.v11i1.357.

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Every year the incidence of premature rupture of membranes ranges from 5-10% of all preterm preterm births and membranes occurring in 1% of all pregnancies.70% of cases of premature rupture of membranes occur in early pregnancy, prematurerupture of membranes is the cause of preterm birth as much as 30% (Manuaba, 2010). Atthe Derah Kepahiang General Hospital, the incidence of premature rupture of membranesis 219 cases in 2016.This research is analytical descriptive research with case controldesign. The sample in this study amounted to 138 people divided into two groups of 69cases and 69 controls. Statistical test using chi square test and binary logisticregression.Results of the study of 69 people with premature rupture of membranes atmaternal age <20 and> 35 years (46.4%), primiparity and grandemultipara parity(62.3%), fetal abnormalities (33.3%), gestational age aterm ( 63.8%) and those with ahistory of premature rupture (18.8%) in Kepahiang Hospital by 2016. Maternal age (pvalue0.013 OR = 2.646), parity (p-value 0.0,0 OR OR = 3.111) (p-value 0,0017 OR =2,950), gestational age (p-value 0,386) and history of premature rupture (p-value 0,167)at Kepahiang Hospital 2016. The most dominant factor causing premature rupture ofmembranes in RSUD Kepahiang year 2016 is parity (Exp (B) 2,806).It is expected thatthe hospital can use the research as input to suppress the incidence of premature ruptureof membranes, by counseling to explain the risk factors of premature rupture ofmembranes, especially maternal age, parity and fetal abnormalities.
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Patil, Alka, Nitin Kulkarni, Anamika Arun, Shruti Singh, and Nilay Patel. "Maternal and Perinatal Outcome in Term Premature Rupture of Membrane." Indian Journal of Obstetrics and Gynecology 6, no. 2 (2018): 102–6. http://dx.doi.org/10.21088/ijog.2321.1636.6218.3.

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Kamphawi, Martha, and Seter Siziya. "Association between Human Immunodeficiency Virus and premature rupture of membranes." Asian Pacific Journal of Health Sciences 4, no. 3 (September 30, 2017): 235–38. http://dx.doi.org/10.21276/apjhs.2017.4.3.35.

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Zilcha-Mano, Sigal. "Resolution of alliance ruptures: The special case of animal-assisted psychotherapy." Clinical Child Psychology and Psychiatry 22, no. 1 (October 17, 2016): 34–45. http://dx.doi.org/10.1177/1359104516671385.

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Many therapists regard alliance ruptures as one of the greatest challenges therapists face in the therapy room. Alliance ruptures has been previously defined as breakdowns in the process of negotiation of treatment tasks and goals and a deterioration in the affective bond between patient and therapist. Alliance ruptures have been found to predict premature termination of treatment and poor treatment outcomes. But ruptures can also present important opportunities for gaining insight and awareness and for facilitating therapeutic change. A process of rupture resolution may lead to beneficial outcomes and serve as a corrective emotional experience. The article describes unique processes of alliance rupture resolution inherent in animal-assisted psychotherapy (AAP). Building on Safran and Muran’s model and on clinical examples, the article describes strategies for identifying ruptures in AAP and techniques for repairing them to facilitate a corrective experience in treatment. Implications for clinical practice and future research are discussed.
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Rahayu, Budi, and Ayu Novita Sari. "Studi Deskriptif Penyebab Kejadian Ketuban Pecah Dini (KPD) pada Ibu Bersalin." Jurnal Ners dan Kebidanan Indonesia 5, no. 2 (November 7, 2017): 134. http://dx.doi.org/10.21927/jnki.2017.5(2).134-138.

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<em>Premature Rupture Membranes is a rupture of the membranes prematurely. KPD Cause not known with certainty, but nothing to do with uterine hypermotility, thin membranes, infections, multiparous, maternal age, </em>location<em> of the fetus, and previous history of premature rupture of membranes. Impact of the KPD can cause maternal or neonatal infection, hypoxia or compression of the umbilical cord, fetal deformity syndrome, increased Caesarean </em>labour<em> or normal delivery failure, and increased morbidity and maternal perinatal mortality. This study was to identify the cause of the incident picture premature rupture in women giving birth in hospitals in Yogyakarta. This study uses descriptive design quantitative used retrospective time approach. The population in this study are all mothers who have premature rupture of membranes in hospitals in Yogyakarta in obtained from medical records. Premature rupture of </em>membrane<em> in Yogyakarta Hospital there </em>are<em> 427 cases. A sampling technique that with a total sampling with 427 respondents. Analysis of the data used univariate analysis. The results that most respondents are multipara many as 245 people (57.4%), aged 20-35 years as many as 265 people (62.1%), gestational age ≥37 weeks as many as 343 people (80.3%), over </em>distensi<em> uteri as many as 410 people (96.1%), where the fetus head presentation many as 396 people (92.7). In conclusion, an overview of the causes of premature rupture events on maternal includes multipara, 20-35 years of age, gestational age ≥37 weeks, normal uterine enlargement, and the location of the fetus normal presentation.</em>
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Narea Morales, Vicky, María Del Carmen Bohórquez Apolinario, Mariuxi Mabel Castro Castro, and Kelvin Bryan Macías Guevara. "Complicaciones maternas y perinatales asociadas a la ruptura prematura de membrana, pacientes mayo–diciembre 2019." Pro Sciences: Revista de Producción, Ciencias e Investigación 4, no. 35 (June 30, 2020): 108–16. http://dx.doi.org/10.29018/issn.2588-1000vol4iss35.2020pp108-116.

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El objetivo de la presente investigación fue establecer la asociación de las complicaciones maternas y neonatales con la ruptura prematura de membrana en las pacientes atendidas en el Hospital Universitario de Guayaquil en el periodo de mayo a diciembre 2019. Fue un estudio de diseño observacional de modalidad cuantitativa, tipo de investigación descriptiva, transversal, prospectiva, donde los resultados obtenidos fueron que la ruptura prematura de membranas se produce en el 25% de los embarazos, y el parto pretérmino ocurre en el 10% y se lo asocia directamente con los casos de prematuridad, siendo los principales factores de riesgo: la edad, insuficientes controles prenatales, antecedentes patológicos y falta de planificación familiar. Los resultados que se obtuvieron de la investigación fueron: de las 100 gestantes investigadas que presentaron complicaciones obstétricas maternas asociadas a ruptura prematura de membranas (27%) seguido de parto prolongado total (23%), ambos se evidencian en las pacientes investigadas con edad gestacional a término, corioamnionitis (12%) y parto prolongado (12%) y las complicaciones perinatales asociadas a la ruptura prematura de membranas (34%) fue prematurez, seguido de síndrome de dificultad respiratoria (29%), ambos se detectan en las pacientes que tuvieron 0-2 controles en la gestación, prematurez (15%) y síndrome de dificultad respiratoria (14%).
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Qomariyah, Kinanatul, and Dewi Susanti Oktavia. "Hubungan Ketuban Pecah Dini Dengan Perpanjangan Kala I Fase Aktif Di Bps Suhartatik, S.St." SAKTI BIDADARI (Satuan Bakti Bidan Untuk Negeri) 4, no. 2 (September 13, 2021): 58–63. http://dx.doi.org/10.31102/bidadari.2021.4.2.58-63.

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Based on data from the International NGO Forum on Indonesia Development (INFID) in 2013, the incidence of prolongation of the first stage of the active phase in Indonesia was 5% of all causes of maternal death. In BPS Suhartatik, S.ST, in 2013 there were 63 (53.8%) mothers who gave birth experienced an extension of the first stage of the active phase, and increased in 2014 as many as 76 (61.29%) of mothers who gave birth experienced an extension of the first phase of the active phase that was wrong one of the biggest causes is premature rupture of membranes. The purpose of this study was to determine the relationship between premature rupture of membranes and the extension of the first stage of the active phase at BPS Suhartatik, S.ST. The design of this research is correlative analytic. Meanwhile, based on time, this study is a cross sectional study. The total population is 34 with the sampling technique using saturated sampling. The independent variable in this study is premature rupture of membranes, while the dependent variable is the extension of the first stage of the active phase. Data were collected using partograph and observation sheet. The statistical test used was chi-square. Based on the cross tabulation, most of the women who gave birth did not experience premature rupture of membranes and extended phase I of the active phase, after being analyzed using the chi-square statistical test, the results obtained were X2count (6.69)> X2table (3.841) so it could be concluded that there was a relationship between ruptured membranes. early stage with an active phase I extension at BPS Suhartatik, S.ST. Maternity women who experience prolonged phase I of the active phase due to premature rupture of membranes can be prevented by regular pregnancy checks, following pregnancy exercises, and attending posyandu every month. In addition, mothers also need to know the signs and symptoms of premature rupture of ketuban
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Penfield, Lauren, Brian Wysolmerski, Michael Mauro, Reza Farhadifar, Michael A. Martinez, Ronald Biggs, Hai-Yin Wu, Curtis Broberg, Daniel Needleman, and Shirin Bahmanyar. "Dynein pulling forces counteract lamin-mediated nuclear stability during nuclear envelope repair." Molecular Biology of the Cell 29, no. 7 (April 2018): 852–68. http://dx.doi.org/10.1091/mbc.e17-06-0374.

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Recent work done exclusively in tissue culture cells revealed that the nuclear envelope (NE) ruptures and repairs in interphase. The duration of NE ruptures depends on lamins; however, the underlying mechanisms and relevance to in vivo events are not known. Here, we use the Caenorhabditis elegans zygote to analyze lamin’s role in NE rupture and repair in vivo. Transient NE ruptures and subsequent NE collapse are induced by weaknesses in the nuclear lamina caused by expression of an engineered hypomorphic C. elegans lamin allele. Dynein-generated forces that position nuclei enhance the severity of transient NE ruptures and cause NE collapse. Reduction of dynein forces allows the weakened lamin network to restrict nucleo–cytoplasmic mixing and support stable NE recovery. Surprisingly, the high incidence of transient NE ruptures does not contribute to embryonic lethality, which is instead correlated with stochastic chromosome scattering resulting from premature NE collapse, suggesting that C. elegans tolerates transient losses of NE compartmentalization during early embryogenesis. In sum, we demonstrate that lamin counteracts dynein forces to promote stable NE repair and prevent catastrophic NE collapse, and thus provide the first mechanistic analysis of NE rupture and repair in an organismal context.
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Dissertations / Theses on the topic "Rupture prematuree"

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SANIEZ, DOMINIQUE. "La rupture prematuree et prolongee des membranes avant 35 semaines d'amenorrhee : conduite obstetricale et devenir neonatal ; a propos de 82 cas de 1985 a 1990." Reims, 1991. http://www.theses.fr/1991REIMM069.

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BIZET, BRUNO. "La rupture prematuree des membranes apres 26 semaines d'amenorrhee gravidique, analyse de la litterature : etude personnelle a propos de 260 observations." Lille 2, 1989. http://www.theses.fr/1989LIL2M214.

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MARTINO, MARC DANIEL. "Les ruptures prematurees des membranes avant 26 semaines d'amenorrhee : quelle attitude pour quels resultats ?" Aix-Marseille 2, 1992. http://www.theses.fr/1992AIX20709.

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Fondrinier, Éric. "Infection amniotique et rupture des membranes ovulaires." Clermont-Ferrand 1, 1989. http://www.theses.fr/1989CLF11030.

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DUPREZ, GUERRIER CLAIRE. "Rupture prematuree des membranes entre 25 et 35 semaines d'amenorrhee : etude de 60 dossiers entre 1991 et 1993." Angers, 1994. http://www.theses.fr/1994ANGE1014.

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Dunan-Khatib, Marie-Odile. "Les ruptures prématurées des membranes entre 16 et 26 semaines d'aménorrhée : pronostic et traitement." Montpellier 1, 1997. http://www.theses.fr/1997MON11136.

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REGNIER-VIGOUROUX, GILLES. "Diagnostic de rupture des membranes par prelevement au niveau du vagin et recherche de diamine oxydase dans le liquide amniotique : a propos de 77 cas." Angers, 1989. http://www.theses.fr/1989ANGE1061.

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Pinto, Giuliane Jesus Lajos. "Colonização endocervical em gestantes com trabalho de parto prematuro e/ou ruptura prematura de membranas." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313483.

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Orientador: Renato Passini Junior
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
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Resumo: Objetivo: estudar a colonização bacteriana endocervical em gestantes com trabalho de parto prematuro e/ou ruptura prematura de membranas (termo e pré-termo). Método: 212 gestantes com trabalho de parto prematuro (TPP) e/ou ruptura prematura de membranas (RPM), internadas no Hospital Estadual Sumaré (Unicamp), foram avaliadas no período de julho de 2002 a janeiro de 2004. Na admissão hospitalar foram coletadas duas amostras do conteúdo endocervical, realizadas bacterioscopia e cultura em meios ágar-sangue ou ágar-chocolate. Foram analisadas associações da colonização endocervical com infecção de trato urinário materno, corioamnionite, uso de antibióticos, dados de parto, sofrimento fetal, prematuridade, infecção e óbito neonatais. Resultados: entre as mulheres estudadas, 74 (35%) tinham TPP e 138 (65%), RPM. A prevalência de colonização endocervical foi de 14,2% (IC=9,5%-18,9%), com resultados similares em TPP e RPM. Na população estudada, o microorganismo mais encontrado foi o estreptococo do grupo B (EGB) (9,4%), sendo também isolados Candida sp (5 casos), Streptococcus sp (2 casos), Streptococcus pneumoniae, Escherichia coli e Enterococcus sp (1 caso de cada). Das bacterioscopias analisadas, os achados mais freqüentes foram baixa prevalência de bacilos de Dodërlein e elevado número de leucócitos. Em mulheres colonizadas houve maior prevalência de infecção de trato urinário (23,8% versus 5,4%; p<0,01), infecção neonatal (25,0% versus 7,3%; p<0,01) e óbito neonatal (dois casos entre as colonizadas; p<0,02), quando comparadas às não-colonizadas. Conclusões: observou-se alta prevalência de colonização endocervical, sem a utilização de meios de cultura seletivos. O EGB foi o principal microorganismo isolado, reforçando a necessidade de triagem deste agente durante a gestação e nas situações de risco estudadas. Um terço das culturas positivas ocorreram por outros agentes. Estudos complementares são necessários para esclarecer a importância destes achados bacteriológicos no canal endocervical e sua associação com complicações gestacionais, sepse e mortalidade neonatais
Abstract: Objective: to study cervical colonization in women with preterm labor and/or premature rupture of membranes. Method: 212 pregnant women with preterm labor and/or premature rupture of membranes (PROM), admitted at Hospital Estadual Sumaré, during the period between July 2002 and January 2004, were studied. Two cervical samples from each woman were collected and bacterioscopy and culture in blood-agar or chocolate-agar plates were performed. Association of cervical microorganisms and urinary infection, chorioamnionitis, antibiotics use, prematurity, neonatal infection and neonatal death were evaluated. Results: the population evaluated consisted of 74 women with preterm labor (35%) and 138 women with PROM (preterm and term). The prevalence of cervical colonization was 14.2% (CI=9.5-18.9%), with similar results in preterm labor or PROM. Group B streptococcus was the most prevalent organism in this population (9.4%). Other organisms isolated were Candida sp, Streptococcus sp, Streptococcus pneumoniae, Escherichia coli and Enterococcus sp. The most common findings of bacterioscopy were a reduced number of lactobacilli and a great number of leukocytes. Endocervical colonization was associated with a higher occurrence of urinary tract infection (23.8% versus 5.4%; p<0.01), early-onset of neonatal infection (25.0% versus 7.3%; p<0.01) and neonatal mortality (2 cases in colonizated women; p<0.02) when compared with a negative culture of endocervical mucus. Conclusions: this study showed high prevalence of endocervical colonization despite of the use of a nonselective culture media. The main microorganism isolated was Group B streptococcus but other organisms were present in one third of studied population. More studies are needed to evaluate the influence of endocervical colonization in obstetrical outcome and in neonatal sepsis and mortality
Mestrado
Tocoginecologia
Mestre em Tocoginecologia
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Lajos, Giuliane Jesus 1974. "Estudo multicêntrico de investigação em prematuridade no Brasil : implementação, correlação intraclasse e fatores associados à prematuridade espontânea = Multicenter study on preterm birth in Brazil: implementation, intracluster correlation and associated factors to spontaneous preterm birth." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313017.

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Orientador: Renato Passini Júnior
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: Introdução: A prematuridade é um problema complexo de saúde pública, sendo a principal causa de morbidade e mortalidade neonatais, com tendência a aumento nas últimas décadas. Foi proposto um estudo com a participação de vários hospitais do Brasil, a fim de avaliar diversos aspectos envolvidos com a ocorrência do parto pré-termo. Objetivos: descrever os métodos de implementação do Estudo Multicêntrico de Investigação em Prematuridade no Brasil; avaliar a homogeneidade amostral dos casos incluídos; estimar a prevalência e analisar fatores associados à prematuridade espontânea. Métodos: estudo transversal multicêntrico, com componente caso-controle aninhado, em 20 hospitais de referência em três regiões geográficas do Brasil. Foram selecionadas as instituições participantes, elaborado o formulário de coleta de dados, escolhido o sistema eletrônico para inclusão de casos, desenvolvido um programa para a digitação dos dados, elaborados manuais de orientação e padronização da coleta de informações, seguidos de implantação do estudo e análise dos dados obtidos. Foi realizada vigilância prospectiva para identificação de partos pré-termo e estimada sua prevalência, subdividindo-os pelas condições determinantes: trabalho de parto espontâneo, ruptura prematura de membranas e parto terapêutico. Foram estimadas taxas de prevalência ou médias, coeficientes de correlação intraclasse, efeitos do desenho do estudo e média de tamanho de conglomerado para mais de 250 variáveis. O risco de parto pré-termo espontâneo foi estimado com Odds Ratio para vários preditores e a análise por regressão logística não condicional identificou fatores independentemente associados. Resultados: Foram incluídas 5.296 mulheres, sendo 4.150 com partos prematuros (casos) e 1.146 com partos a termo (controles), e avaliados 5.752 recém-nascidos. A taxa geral de prematuridade foi 12,3%. Os coeficientes de correlação intraclasse foram baixos (<0,1) na maioria das variáveis. Comparando 2.682 partos prematuros espontâneos com 1.146 partos a termo, a análise multivariada identificou como fatores de risco para o parto pré-termo: antecedente de parto prematuro, gravidez múltipla, suspeita de insuficiência cervical, malformação fetal, polidrâmnio, sangramento vaginal, número insuficiente de consultas de pré-natal, aborto anterior e infecção do trato urinário. Conclusões: A implantação do Estudo Multicêntrico de Investigação em Prematuridade no Brasil foi a primeira etapa de uma ampla avaliação da prematuridade no país. Os coeficientes de correlação intraclasse indicaram adequada heterogeneidade da amostra estudada. Seus valores poderão ser usados como referência no cálculo de tamanho amostral de estudos futuros na área. A prevalência de partos pré-termo nos centros terciários do Brasil foi alta. Antecedente de parto prematuro, gravidez múltipla, suspeita de insuficiência cervical, malformação fetal, polidrâmnio, sangramento vaginal, número insuficiente de consultas de pré-natal, aborto anterior e infecção do trato urinário foram considerados fatores de risco para parto prematuro espontâneo. A identificação desses fatores pode auxiliar no planejamento de medidas para reduzir a ocorrência de partos pré-termo
Abstract: Background: Preterm birth is the main cause of neonatal morbidity and mortality, resulting in a high likehood of sequelae in surviving children, with a tendency to increase in last decades. A study intending to collect information from hospitals in Brazil on several aspects of preterm birth was proposed. Objectives: To describe the methods used in elaborating and implementing the Brazilian Multicenter Study on Preterm Birth; to evaluate the homogeneity of the sample included in the network; to assess the prevalence of preterm births in Brazil and to identify factors associated with spontaneous preterm birth. Methods: The project consisted of a multicenter cross-sectional study plus a nested case-control study in 20 reference hospitals of three regions of Brazil. The elegible hospitals were selected, forms for data collection were prepared, an electronic system for the inclusion of cases was selected, a program for entering data was developed and the implantation process and data analysis were performed. A prospective surveillance was implemented to identify preterm births, to estimate its prevalence, subdividing into determinats conditions: spontaneous labor, prelabor rupture of membranes or therapeutic birth. Estimated prevalence rates or means, intracluster correlation coefficients, design effects and mean cluster sizes were presented for more than 250 variables. The risk of spontaneous preterm birth was estimated with Odds Ratio for several predictors and a non-conditional logistic regression analysis was then performed to identify independently associated factors. Results: Overall, 5,296 women were included in the study, being 4,150 preterm births (cases) and 1,146 term births (controls), and the total number of studied newborns was 5,752. Overall rate of preterm birth was 12.3%. Intracluster correlation coefficients were low (<0.1) in most variables, showing intracluster heterogeneity. When comparing 2,682 spontaneous preterm births to a sample of 1,146 term births, the multivariate analyzes identified as risk factors for preterm birth: a previous preterm birth, multiple pregnancy, cervical insufficiency, fetal malformation, polyhydramnios, vaginal bleeding, inadequate number of prenatal care visits, previous abortion, and urinary tract infection. Conclusions: The implementation of the Brazilian Multicenter Study on Preterm Birth was the first step of a comprehensive assessment of prematurity in the country. Intracluster correlation coefficients for the outcome variables indicate adequate sample heterogeneity. Their values can be used to calculate the sample size of further studies in the area. The preterm birth rate in tertiary facilities in Brazil was high and the proportion of therapeutic preterm births was over one third. Previous preterm birth, multiple pregnancy, cervical insufficiency, fetal malformation, polyhydramnios, vaginal bleeding, inadequate number of prenatal care visits, previous abortion, and urinary tract infection were considered risk factors to spontaneous preterm birth. Identification of these factors can be worth for planning effective measures to reduce the occurrence of preterm births
Doutorado
Saúde Materna e Perinatal
Doutora em Ciências da Saúde
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Vogt, Marianna. "Doença periodontal e resultados perinatais adversos em uma coorte de gestantes." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290423.

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Orientadores: Antonio Wilson Sallum, Jose Guilherme Cecatti
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Este estudo teve por objetivo avaliar a prevalência de doença periodontal em uma amostra de gestantes de baixo risco gestacional, os fatores a ela associados, e sua correlação com a ocorrência de resultados perinatais adversos, como parto pré-termo, recém-nascido de baixo peso, recém-nascido pequeno para a idade gestacional e amniorrexe prematura. Trata-se de um estudo de coorte com 334 gestantes fazendo acompanhamento pré-natal no Hospital das Clínicas da UNICAMP, que aceitaram participar voluntariamente e tiveram um único exame periodontal realizado no dia da consulta pré-natal. Os dados foram coletados da anamnese, do exame clínico periodontal e de informações relativas à gestação, parto e puerpério. Os parâmetros clínicos periodontais foram: índice de placa, índice de sangramento gengival à sondagem, profundidade de sondagem, nível de inserção clínica periodontal e retração gengival. As gestantes foram divididas em dois grupos: as com periodontite moderada a grave (P2-P4), e as sem doença ou com doença periodontal leve (P0-P1), pela classificação do índice WS. Avaliaram-se também a idade, paridade, raça, escolaridade, estado civil, hábitos alimentares, índice de massa corpórea (IMC), número de consultas de pré-natal, fumo, uso de bebidas e drogas, uso de medicação, vaginose bacteriana e doenças sistêmicas. Inicialmente foi utilizada uma abordagem analítica de corte transversal para a identificação de fatores associados à ocorrência de doença periodontal na gestação. Depois utilizou-se uma abordagem de estudo de coorte propriamente dito, estimando-se o risco de ocorrência dos resultados perinatais desfavoráveis (parto pré-termo, recém-nascido de baixo peso, recém-nascido pequeno para a idade gestacional e amniorrexe prematura, variáveis dependentes principais do estudo) em função da condição periodontal. Foram analisadas as distribuições de freqüência das variáveis independentes pelas categorias de doença periodontal, estimando-se a Razão de Prevalência e seu IC95% para abordagem transversal. Foi então realizada a análise uni e multivariada para a estimativa do risco de ocorrência das variáveis perinatais desfavoráveis na abordagem de coorte, calculando-se a Razão de Risco e seu IC95% para cada uma delas. Foi estabelecido o nível de significância de 5%. A prevalência de periodontite moderada a grave nas 334 gestantes foi de 47%, e se associou significativamente com a idade gestacional mais avançada ao exame periodontal (17-24 semanas: RP 1,40, IC95% 1,01-1,94; e 25-32 semanas: RP 1,52, IC95% 1,10-2,08), com a idade materna entre 25 e 29 anos (RP 1,65, IC95% 1,02-2,68), com a obesidade (RP 1,38, IC95% 1,04-1,82) e com a presença de sangramento gengival (ORajustado 2,01 - IC95% 1,41-2,88). Foram coletados os dados do parto de 327 gestantes e, entre elas, a doença periodontal esteve associada a um maior risco de ocorrência de parto pré-termo (RR 3,47 IC95% 1,62-7,43), de RN de baixo peso (RR 2,93 IC95% 1,36-6,34) e de amniorrexe prematura (RR 2,48 IC95% 1,35-4,56) na análise multivariada. A prevalência de doença periodontal entre gestantes de baixo risco gestacional é alta e associada com a maior idade gestacional, obesidade e sangramento gengival. A doença periodontal foi um fator de risco para a ocorrência de parto pré-termo, RN de baixo peso e de amniorrexe prematura
Abstract: This study was aimed to evaluate the prevalence of periodontal disease in a sample population of low-risk pregnant women, the factors associated with it and its correlation with the occurrence of adverse perinatal outcomes, including preterm births, low birth weigth, small for gestational age babies and premature rupture of the membranes. This cohort study included 334 pregnant women under prenatal care at the Hospital das Clinicas of the University of Campinas, Brazil, who voluntarily accepted to participate and had one single periodontal examination performed in the same day of a prenatal visit. Data was collected from anamnesis, periodontal clinical exam, and from information regarding pregnancy, delivery and postpartum. The clinical periodontal parameters were: plaque index, bleeding on probing index, probing pocket depth, clinical attachment level and gingival recession. Pregnant women were divided into two groups: those with moderate-to-severe periodontitis (P2-P4) and those with no disease or only mild disease (P0-P1), according to the WS classification index. Age, parity, race/color, years of schooling, marital status, number of prenatal visits, dietary habits, BMI (body mass index), smoking habits, use of alcohol and drugs, use of medication and presence of systemic diseases d bacterial vaginosis were also evaluated. Initially a cross sectional analytic approach was used for identifying factors associated with the occurrence of periodontal disease during pregnancy. After that, a real cohort approach was used, with the estimate of the risk of adverse perinatal outcomes (preterm birth, low birth weight, small for gestational age baby and premature rupture of membranes, the main dependent variables of this study) according to the condition of periodontal disease. Distribution of independent variables within the two groups was analyzed by calculating prevalence ratios and their respective 95% confidence intervals for the cross sectional approach. Uni and multivariate analysis for the estimation of the risk of adverse perinatal outcomes were performed for the cohort approach. The Risk Ratior and its 95%CI were estimated for each outcome. The significance level assumed was 5%. The prevalence of moderate to severe periodontitis in 334 pregnant women was 47%, and it was significantly associated with more advanced gestational age at periodontal examination (17-24 weeks: PR 1.40, 95%CI 1.01-1.94; and 25-32 weeks: PR 1.52, 95%CI 1.10 ¿ 2.08), with maternal age between 25 - 29 years (PR 1.65, 95%CI 1.02 ¿ 2.68), with obesity (PR 1.38, 95%CI 1.04 ¿ 1.82) and with the presence of gingival bleeding (ORadjusted 2.01, 95%CI 1.41 ¿ 2.88). The data of 327 deliveries were collected and, among them, the periodontal disease was associated to a higher risk of preterm birth (RR 3.47 95%CI 1.62-7.43), of low birth weight (RR 2.93 95%CI 1.36-6.34) and of premature rupture of membranes (RR 2.48 95%CI 1.35-4.56) in the multivariate analysis. The prevalence of periodontal disease among low-risk pregnant women is high and it is associated with more advanced gestational age, obesity and gingival bleeding. Periodontal disease was a risk factor for the occurrence of preterm birth, low birth weight and premature rupture of membranes
Mestrado
Periodontia
Mestre em Clínica Odontológica
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Books on the topic "Rupture prematuree"

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1968-, Sebire N. J., and Nicolaides K. H, eds. Preterm prelabour amniorrhexis. New York: Parthenon Pub. Group, 1996.

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Oskamp, Marilynne. The lived experience of women with preterm premature rupture of the membranes, PPROM, who remained at home until delivery of their infants. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1999.

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D, Wenstrom Katherine, and Weiner Carl P, eds. Premature rupture of membranes. Philadelphia: Saunders, 1992.

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Goulet, Céline *. Risk factors associated with preterm, premature rupture of fetal membranes. 1989.

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Seiichiro, Fujimoto, ed. Recent advance in diagnosis of preterm premature rupture of the membranes. Sapporo, Japan: Hokkaido University School of Medicine, 1998.

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Chien, Edward. Premature Rupture of Membranes, an Issue of Obstetrics and Gynecology Clinics. Elsevier, 2020.

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Juri Moran, Joulia Marianita, Paulina Elizabeth Durán Mora, Estefania Vanessa Arauz Andrade, Yessenia Isabel Sarchi Guayasamin, Alejandra Elizabeth Vasquez Fuel, Cesar Wladimir Reyes Padilla, Pamela Nathaly Pastrano Coronado, Lucia Paola Rodriguez Paz, Martha Elizabeth Aguilar Villagran, and Oscar Andres Toapanta Proaño. Ginecología Obstetricia: Patologías durante el embarazo. Mawil Publicaciones de Ecuador, 2019, 2020. http://dx.doi.org/10.26820/978-9942-826-07-7.

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En Medicina, el área de aplicación de Ginecología, la ciencia de la mujer condensa el estudio de las enfermedades frecuentes y graves, el diagnóstico, detección de los factores de riesgo y establecer mecanismos de prevención, prescribir los tratamientos médicos y quirúrgicos de las enfermedades del sis- tema reproductor femenino, entiéndase, todo lo relacionado con la vagina, las mamas, el útero y los ovarios. Durante el siglo XX, motivado por el crecimiento acelerado del conocimien- to científico y médico, se acrecienta la toma de conciencia del rol que le co- rresponde desempeñar a la medicina en el sector de la salud y la protección de la mujer embarazada. Los problemas del trato genital femenino cuando se asumen como responsabilidad de los ginecólogos, quienes incluyeron dentro del proceso de auscultación, diagnóstico y tratamiento aspectos fisiológicos y endocrinos. Las barreras de la formación académica se fueron difuminando y los ginecó- logos y obstetras comenzaron a estrechar su campo laboral y como resultante se constituyó la Ginecobstetricia. En el marco de estas reflexiones, surge la idea de la presentación de un tex- to titulado Ginecología – Obstetricia, mediante el cual se pretende hacer una contribución real a nivel teórico que permita apoyar a profesionales y estu- diantes en el área de salud humana, básicamente en algunas de las patologías o complicaciones médicas asociadas al embarazo, y tratadas por la especialidad obstétrica, así mismo, se abordan dos temas (1 y 2) de conocimiento general. Cabe indicar que el texto no pretende abordar la vasta información o literatura que sobre los temas se han tratado. El libro ha sido estructurado bajo el perfil de diez (10) temas que discurren estrictamente sobre contenidos específicos, a sa- ber: 1. El parto y sus fases, 2. Pruebas de Bienestar Fetal, 3. Amenaza de Parto Pretérmino, 4. Ruptura Prematura de Membranas, 5. Amenaza de aborto, 6. Desprendimiento de placenta, 7. Infecciones de vías urinarias en embarazadas, 8. Diabetes Gestacional, 9. Hipertension en las embarazadas y 10. Preeclamp- sia y eclampsia En el primer tema, el Parto y sus fases, se precisan diferentes nociones sobre 26 GINECOLOGIA - OBSTETRICIA el proceso y el resultado de parir (dar a luz). A lo largo de la historia ha evolu- cionado el conocimiento de este tema dando como resultado una terminología precisa sobre los diferentes tipos de parto: parto natural, parto normal, parto ins- trumental, parto pretérmino, parto humanizado, etc. Estas nociones obedecen a determinadas circunstancias específicas que lo circunscribe como el uso o no de instrumentos que ayuden al nacimiento de un feto. De manera general, el parto marca el final del embarazo y el nacimiento de la criatura que se engendraba en el útero de la madre. Este proceso por el que la mujer o la hembra de una especie vivípara expulsa el feto y la placenta al final de la gestación consta de tres fases: la fase de dilatación, la de expulsión y la placentaria o de alumbramiento. En el segundo tema titulado Pruebas de Bienestar Fetal, se destaca el desa- rrollo de diferentes pruebas para el control del bienestar fetal. Éstas constitu- yen las técnicas aplicadas a las madres que permiten predecir el posible riesgo fetal o hacer un pronóstico del estado actual del feto, es decir, que tratan de conseguir a través de una valoración del feto de forma sistemática, la identifi- cación de aquellos que están en peligro dentro del útero materno, para así to- mar las medidas apropiadas y prevenir un daño irreversible. Se abordan en este contexto las indicaciones y los métodos (clínicos, biofísicos y bioquímicos más utilizados para el control de bienestar fetal. En el tema tres (3) denominado Amenaza de Parto Pretérmino, el trabajo se centra, en el desarrollo de los siguientes ítems. La Definición de Parto Pretérmi- no, la Definición de amenaza de Parto Pretérmino, la Evaluación del riesgo, la etiología, la Clínica de la Amenaza de Parto Pretérmino, el Diagnóstico precoz de la Amenaza de Parto Pretérmino, la Evaluación de gestantes que acuden a emergencia por signos y síntomas de Amenaza de Parto Pretérmino y el trata- miento. El trabajo parte de la definición de Parto Pretérmino entendido como aquel que ocurre después de la semana 23 y antes de la semana 37 de gestación, para posteriormente, tratar lo relativo a la Amenaza de Parto Pretérmino (APP) definido como el proceso clínico sintomático (Aparición de dinámica uterina regular acompañado de modificaciones cervicales) que puede conducir a un parto pretérmino. Su etiología es compleja y multifactorial, en la que pueden intervenir de forma simultánea factores inflamatorios, isquémicos, inmunológi- cos, mecánicos y hormonales. 27 GINECOLOGIA - OBSTETRICIA Por otro parte, el tema cuatro (4) expone la Ruptura Prematura de Membra- nas, la cual constituye una complicación usual en la práctica obstétrica, esta puede aumentar la incidencia en la morbilidad y mortalidad materna – fetal. Múltiples estudios se están llevando a cabo para poder dilucidar completamente su fisiopatología, lo cual se hace cada vez más necesario para poder aplicar estos conceptos en la práctica clínica, la evidencia actual indica que la Ruptura Prematura de Membrana es un proceso que puede ser afectado por factores: bioquímicos, fisiológicos, patológicos y ambientales. El capítulo cinco (5) comprende la temática sobre la Amenaza de aborto. (AA) que es la complicación más común durante el embarazo, se define como el sangrado transvaginal antes de las 20 semanas de gestación (SDG) gestación o con un feto menor de 500g, con o sin contracciones uterinas, sin dilatación cervical y sin expulsión de productos de la concepción”. Es decir, se presenta hemorragia de origen intrauterino antes de la vigésima semana completa de ges- tación, con o sin contracciones uterinas, sin dilatación cervical y sin expulsión de los productos de la concepción. Los síntomas abarcan amenorrea secundaria, presencia de vitalidad fetal y cólica abdominales con o sin sangrado vaginal entre otros. Para el diagnóstico se puede hacer una ecografía abdominal o va- ginal, examen pélvico y de laboratorio. En un principio el tratamiento consiste en recomendar reposo en cama y reposo pélvico. La identificación de factores de riesgo, el Ultrasonido obstétrico y la medición de marcadores bioquímicos son de gran importancia para realizar un diagnóstico y establecer un pronóstico oportuno. Estos aspectos y otros relacionados con el tema como son: la clínica, el protocolo a seguir, el tratamiento y la prevención, son tratados en este capí- tulo. El tema Desprendimiento de placenta es desarrollado a lo largo del tema seis (6). Su contenido aborda los aspectos importes como los factores de riesgo, etiología, síntomas y signos, diagnóstico y tratamiento de esta complicación cuyo proceso se caracteriza por el desprendimiento total o parcial, antes del parto, de una placenta que esta insertada en su sitio normal. Este hecho que puede traer grandes consecuencias para el feto y para la madre, puede ocurrir en cualquier momento del embarazo. Los desprendimientos producidos antes de las 20 semanas, por su evolución, deberán ser tratados como abortos. Los que tienen lugar después de la semana 20 de gestación y antes del alumbramiento constituyen el cuadro conocido como desprendimiento prematuro de la placenta normalmente insertada. (abrptio plantae o accidente de Baudelocque). El pro- ceso ha tenido una variedad de denominaciones a lo largo del tiempo y son consecuencia de la diversidad de cuadros clínicos que pueden producirse, sien- do las más empleadas en la actualidad: abruptio placentae, ablatio placentae, desprendimiento prematuro de placenta normalmente inserta (DPPNI), junto con el término abreviado desprendimiento prematuro de placenta (DPP). Para hablar de otra importante complicación que aqueja a la gestante y su bebe por nacer se expone en el tema (7) relacionado con las Infecciones de vías urinarias en embarazadas. Los particulares cambios morfológicos y funcio- nales que se producen en el tracto urinario de la gestante hacen que la infec- ción del tracto urinario (ITU) sea la segunda patología médica más frecuente del embarazo, por detrás de la anemia. Las 3 entidades de mayor repercusión son: Bacteriuria asintomática (BA) (2-11%), cuya detección y tratamiento son fundamentales durante la gestación, pues se asocia a prematuridad, bajo peso y elevado riesgo de progresión a pielonefritis aguda (PA) y sepsis; la Cistitis aguda (CA) (1,5%) y la Pielonefritis aguda (1-2%), principal causa de ingreso no obstétrico en la gestante, que en el 10 al 20% de los casos supone alguna complicación grave que pone en riesgo la vida materna y la fetal. La Diabetes Gestacional se ubica y desarrolla en el tema ocho (8). Este tipo de diabetes que aparece o se diagnostica durante el embarazo ha aumentado su prevalencia y cobrado gran relevancia epidemiológica en los últimos años. La Diabetes Gestacional (DG) o Diabetes Mellitius Gestacional (DMG) se carac- teriza por una secreción de insulina insuficiente para compensar la resistencia a la hormona, propia del embarazo. Después del parto, los niveles de glucosa sanguínea suelen normalizarse; sin embargo, algunas mujeres desarrollan DM tipo 2 y se asocia con complicaciones graves en la madre y el hijo, incluso años después del nacimiento. La Hipertensión en las Embarazadas, tema tan tratado y controvertido en los últimos años por su significación a nivel de que es la complicación médica 29 GINECOLOGIA - OBSTETRICIA más frecuente de la gestación y ocurre según estudios comprobados en el 7% a 10% de los embarazos y constituye una causa importante de morbimortalidad materna y perinatal. De manera clásica, la HTA en el embarazo ha sido definida como el incremento, durante la gestación, de la presión arterial sistólica (PAS) en 30 mmHg o más y/o la presión arterial diastólica (PAD) en 15 mmHg o más comparado con el promedio de valores previos a la 20va. semana de gestación. Cuando no se conocen valores previos, una lectura de 140/90 mmHg o mayor es considerada como anormal. El tema desarrollado abarca una visión general sobre algunos aspectos relativos a la definición y su clasificación, los factores predisponentes, sintomatología, diagnóstico, tratamiento, etc. Por último, el tema 10 aborda dos alteraciones íntimamente ligadas a la hi- pertensión arterial en el embarazo: la preeclampsia y la eclampsia. Éstas son en ocasiones tratadas como componentes de un mismo síndrome ya que la pree- clampsia es la hipertensión de reciente comienzo con proteinuria después de las 20 semanas de gestación y la eclampsia es la presencia de convulsiones genera- lizadas inexplicables en pacientes con preeclampsia.
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Book chapters on the topic "Rupture prematuree"

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Arnold, Kate C., and Caroline J. Flint. "Premature Rupture of Membranes." In Obstetrics Essentials, 291–97. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57675-6_43.

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Lyons, Paul. "Premature Rupture of Membranes." In Obstetrics in Family Medicine, 65–70. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20077-4_8.

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Lyons, Paul, and Nathan McLaughlin. "Premature Rupture of Membranes." In Obstetrics in Family Medicine, 73–78. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39888-0_9.

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Shimoya, Koichiro. "Premature Rupture of Membranes." In Preterm Labor and Delivery, 207–12. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9875-9_21.

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Mercer, Brian. "Premature Rupture of the Membranes." In Protocols for High-Risk Pregnancies, 448–60. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444323870.ch54.

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Mercer, Brian M. "Preterm Premature Rupture of Membranes." In Queenan's Management of High-Risk Pregnancy, 364–73. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781119963783.ch43.

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Navti, Osric Banfegha. "Premature Rupture of Membranes (PROM)." In Contemporary Obstetrics and Gynecology for Developing Countries, 129–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75385-6_13.

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Aghajanian, Paola. "Preterm Premature Rupture of the Membranes." In Management of Common Problems in Obstetrics and Gynecology, 5–8. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444323030.ch2.

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Locatelli, Anna, and Sara Consonni. "19. Preterm premature rupture of membranes." In Obstetric Evidence Based Guidelines, 227–42. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315200903-20.

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Graham, George, and Stephanie Bakaysa. "Preterm premature rupture of membranes (PPROM)." In Evidence-based Obstetrics and Gynecology, 397–406. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119072980.ch38.

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Conference papers on the topic "Rupture prematuree"

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Syamsi, Efrida Yusriyanti, and Nuli Nuryanti Zulala. "Premature Rupture of Membrane (PROM) Increasing Asphyxia Neonatorum Risk." In International Conference on Health and Medical Sciences (AHMS 2020). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/ahsr.k.210127.053.

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Набеева, Диана Альбертовна, Екатерина Пантелеевна Корняева, Татьяна Владимировна Микрюкова, Алена Александровна Караваева, Сергей Анатольевич Серебряков, Сахила Низамовна Мулкадарова, and Мария Александровна Осетрова. "ANALYSIS OF RISK FACTORS OF PRETERM PREMATURE RUPTURE OF MEMBRANES." In Высокие технологии и инновации в науке: сборник избранных статей Международной научной конференции (Санкт-Петербург, Май 2020). Crossref, 2020. http://dx.doi.org/10.37539/vt185.2020.12.69.037.

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Статья посвящена анализу и выявлению факторов риска преждевременного излития околоплодных вод (ПИОВ). Проводится ретроспективный сравнительный анализ исхода родов для плода и матери с и без ПИОВ. The article is devoted to the analysis and identification of risk factors for preterm premature rupture of membranes (PPRM). A retrospective comparative analysis of the outcome of labor for the fetus and mother with and without PPRM is carried out.
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Ameye, L., J. De Brabanter, J. A. K. Suykens, I. Cadron, R. Devlieger, D. Timmerman, B. Spitz, and S. Van Huffel. "Predictive Models for Long Term Survival after Premature Rupture of Membranes." In 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference. IEEE, 2005. http://dx.doi.org/10.1109/iembs.2005.1615500.

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Pratiwi, Ika, Melyana Nurul Widyawati, and Suryono Suryono. "Pattern Recognition Image Color for Premature Rupture of Membranes Diagnosis Using Euclidean Algorithm." In 2019 Fourth International Conference on Informatics and Computing (ICIC). IEEE, 2019. http://dx.doi.org/10.1109/icic47613.2019.8985701.

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Salmarini, Desilestia. "The Analysis Factors Premature Rupture Of Membranes At Ansari Saleh General Hospital Banjarmasin." In Proceedings of the First National Seminar Universitas Sari Mulia, NS-UNISM 2019, 23rd November 2019, Banjarmasin, South Kalimantan, Indonesia. EAI, 2020. http://dx.doi.org/10.4108/eai.23-11-2019.2298401.

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Aumuller, John J., and Vincent Carucci. "Premature Degradation and Failure of Steam-Methane Reformer Heater System Components." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84006.

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Bulk hydrogen production in a petroleum refinery by steam–methane reforming utilizes high temperatures, moderate pressures and catalyst – filled tubes which generate high tube temperatures of up to 1,690 °F [920 °C] imposing relatively harsh performance demands on system components which are not usually encountered in other refinery or petrochemical plant equipment. Creep rupture and high temperature cycling place a severe service duty on the catalyst tubes, tube outlet pigtails, the subheader train and the downstream steam generator leading to ruptured pigtails, cracking in sub-headers and break up of the ceramic tube sheet ferrules at the steam generator inlet tubesheet. Although the industry has developed specific fit-for-purpose design practice standards augmented with detailed technical reports, reliability issues persist and regularly force premature shutdown of the reformer heater and downstream heat recovery equipment. Among these practices are API Standard 530 and API TR 942-A. API 530 assists designers in the selection of materials and determination of pressure design thickness of heater tubes while API TR 942-A attempts to reconcile the contradictory industry experience where some operators have little or no problems while others suffer premature degradation and cracking of outlet pigtails and manifold components. A reconciliation between application of industry design practices and equipment performance is presented in this paper to determine whether systemic issues contribute to the apparent situation; and, recommendations are made for pressure component design and material selection for steam-methane reformers.
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Kimura, Kazuhiro. "Evaluation of Stress Rupture Factors for Grade 91 Weldments." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84572.

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Stress rupture factors and weld strength reduction factors for Grade 91 weldments in the codes and literatures have been reviewed. Stress rupture factors for weld metals proposed for Code Case N-47 in the mid 1980’s was defined as the average rupture strength of the deposited filler metal to the average rupture strength of the base metal. Remarkable drop in creep rupture strength of weldments is significant issue of Grade 91, especially in the low-stress and long-term regime. A premature failure of Grade 91 weldments in the long-term, however, is caused by Type IV failure which takes place in the fine grained heat affected zone (FG-HAZ), rather than fracture in the deposited weld metal. The stress rupture factor of the Grade 91 steel, therefore, was based on the creep rupture strength of cross weld test specimens. Time and temperature dependent stress rupture factors for Grade 91 have been estimated based on the average creep rupture strength of cross weld test specimen to the average creep rupture strength of base metal.
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Joyce, Erinn M., Michael S. Sacks, and John J. Moore. "Structure Mechanical Function Relationships of the Fetal Membrane." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176687.

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A normal pregnancy requires physical integrity of the fetal membrane (FM) until term delivery. Timely rupture of the fetal membrane is a vital part of term labor [1]. Premature failure of the FM, prior to full gestation, accounts for one third of all premature human births and affects 3% of all pregnancies [2]. Membrane rupture is either due to the release of the amniotic fluid, frequently signaling the onset of labor, or under a pathological circumstance [3]. In order to develop a rational basis for treatment and prevention of premature FM failure, we need first to understand FM structural and mechanical behavior. This includes its constituent layers at near full term under normal physiological loading states. Once these properties are established, we can then better formulate how the tissue transitions to the ability to fail at full term.
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Oyen, Michelle L., Virginia L. Ferguson, and Steven E. Calvin. "Fracture Resistance of Human Amnion." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-174552.

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While normal delivery requires disruption of the placental membranes (the “breaking of waters”), in one third of premature births delivery results from with mechanical rupture of the placental membranes prior to full-term gestation [1]. The biomechanical investigation of membrane rupture has thus been a subject of recent study [2–5]. In particular, mechanical investigations aimed specifically at understanding the membrane rupture process have concluded that the chorioamnion membrane bilayer breaks in two separate events, such that the chorion and amnion component layers fail independently, and that the delamination of the chorioamnion may represent a significant fraction of the total mechanical work done in membrane rupture [5]. The amnion is the stiffer and stronger of the two membrane layers, consisting primarily of a dense type I collagen network.
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Wahyuni, Sri, Tutik Rahayu, and Apriliani Yulianti Wuriningsih. "Spiritual Endorphine Stimulation as Methods to Increase Fetal Well Being on Pregnant Woman with Early Premature Rupture of Membranes." In The 9th International Nursing Conference: Nurses at The Forefront Transforming Care, Science and Research. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0008331306990702.

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Reports on the topic "Rupture prematuree"

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HYSTERETIC PERFORMANCE OF WEAK-AXIS CONNECTION WITH I-SHAPED PLATES IN STEEL FRAME. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.1.

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This paper elucidates numerically the behavior of weak-axis moment connections proposed by welding I-shaped plates in the H-section column to increase connection strength and ductility in steel frame. After validating the numerical methods through comparing the results of numerical analysis and experiments, the effectiveness of the proposed weak-axis connection were examined through comparing to the traditional weak-axis connection. The proposed weak-axis connection could move the highest stresses away from the start-stop points of a weld, and thus preventing the premature brittle fracture of the beam flange welds. The plastic hinge formed away from the beam-column interface, while the local buckling occurred in the weld access holes region in the traditional weak-axis connection. The proposed weak-axis connections can be classified as rigid in a strong-bracing system, and be classified as semi-rigid in weak-supported or unsupported system. And then a series of parametric studies was conducted to better understand the behavior of proposed weak-axis moment connections. The force-displacement relationships, location of the plastic hinge, Mises index (MI), triaxiality index (TI) and rupture index (RI) distributions at the beam flange welds were reported in detail. According to the numerical analysis, the design variables of I-shaped plates and widened flange plate are suggested, along with a design procedure.
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