Correlação dos níveis de lactato sanguíneo com o estado neurológico e cardiorrespiratório de filhotes de cães nascidos de parto normal ou cesariana sob anestesia geral inalatória

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência do controle metabólico materno nos resultados da cardiotocografia anteparto e sua relação com o prognóstico perinatal, nas gestações complicadas pelo diabete

Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB

IL-10 e TNF-α no sangue materno e nas placentas de gestações complicadas por diabete ou hiperglicemia gestacional leve - correlação com controle glicêmico e resultados perinatais

Objective - At evaluating the IL-10 production in maternal blood and placenta and correlate them with perinatal outcomes in pregnancies complicated by hyperglycemia, or with risk to developing it, differentiated by the glycemic mean (GM < or ≥ 100mg/dL). Method- 186 pregnant women were distributed into groups GM < 100 mg/dL and GM ≥ 100 mg/dL. We evaluated the GM, HbA1c levels, maternal and placental IL-10 and TNF-α and the correlation between placental cytokines and perinatal outcomes. Results - In maternal blood, the lower concentrations of IL-10 (1.01 ± 0.87 vs. 3.08 ± 5.57 pg / mL, p = 0.0019) were observed in GM ≥ 100 mg / dL group. Placental IL-10 was directly correlated with hemoglobin levels (r = 0.63, p = 0.02) and insulin (r = 0.78, p = 0.01) from umbilical cord and with Apgar scores 1 (r = 0.53, p = 0.0095) and Apgar 5 (r = 0.69, p = 0.0003). Conclusion - GM ≥ 100mg/dL was associated with decreased of maternal IL-10. Placental IL-10 was similar in both groups and correlated directly with hemoglobin and insulin and with Apgar scores of 1st. and 5th. minutes

Auditory brainstem response in term and preterm infants with neonatal complications: the importance of the sequential evaluation

Introduction Literature data are not conclusive as to the influence of neonatal complications in the maturational process of the auditory system observed by auditory brainstem response (ABR) in infants at term and preterm. Objectives Check the real influence of the neonatal complications in infants by the sequential auditory evaluation. Methods Historical cohort study in a tertiary referral center. A total of 114 neonates met inclusion criteria: treatment at the Universal Neonatal Hearing Screening Program of the local hospital; at least one risk indicator for hearing loss; presence in both evaluations (the first one after hospital discharge from the neonatal unit and the second one at 6 months old); all latencies in ABR and transient otoacoustic emissions present in both ears. Results The complications that most influenced the ABR findings were Apgar scores less than 6 at 5 minutes, gestational age, intensive care unit stay, peri-intraventricular hemorrhage, and mechanical ventilation. Conclusion Sequential auditory evaluation is necessary in premature and term newborns with risk indicators for hearing loss to correctly identify injuries in the auditory pathway.

Resultados maternos e neonatais em centro de parto normal peri-hospitalar e hospital

OBJETIVO: Comparar os resultados maternos e neonatais em mulheres de baixo risco atendidas em centro de parto normal peri-hospitalar e hospital. MÉTODOS: Estudo transversal com amostra representativa de mulheres de baixo risco atendidas em São Paulo, SP, de 2003 a 2006. Foram incluídas 991 mulheres que tiveram o parto no centro de parto normal e 325 que deram à luz no hospital. Os dados foram obtidos dos prontuários. A análise comparativa foi realizada para o total de mulheres e estratifi cada segundo a paridade. Foram aplicados os testes qui-quadrado e exato de Fisher. RESULTADOS: Houve distribuição homogênea das mulheres segundo a paridade (45,4% nulíparas e 54,6% mulheres com um ou mais partos anteriores). Foram encontradas diferenças estatisticamente signifi cantes em relação às seguintes intervenções: amniotomia (mais freqüente entre nulíparas do hospital); utilização de ocitocina no trabalho de parto e utilização de analgésico no pós-parto (mais freqüentes no hospital entre as mulheres de todas as paridades). A taxa de episiotomia foi maior entre as nulíparas, tanto no centro de parto como no hospital. Houve maior freqüência de intervenções com o neonato no hospital: aspiração das vias aéreas superiores, aspiração gástrica, lavagem gástrica, oxigênio por máscara aberta. Também ocorreram com mais freqüência no hospital bossa serossanguínea, desconforto respiratório e internação na unidade neonatal. Não houve diferença nos valores de Apgar no quinto minuto nem casos de morte materna ou perinatal. CONCLUSÕES: A assistência no centro de parto normal foi realizada com menos intervenções e com resultados maternos e neonatais semelhantes aos do hospital.

Prenatal and Neonatal Adaptations with a Focus on the Respiratory System

Contents Among the modifications that occur during the neonatal period, pulmonary development is the most critical. The neonate's lungs must be able to perform adequate gas exchange, which was previously accomplished by the placenta. Neonatal respiratory distress syndrome is defined as insufficient surfactant production or pulmonary structural immaturity and is specifically relevant to preterm newborns. Prenatal maternal betamethasone treatment of bitches at 55days of gestation leads to structural changes in the neonatal lung parenchyma and consequently an improvement in the preterm neonatal respiratory condition, but not to an increase in pulmonary surfactant production. Parturition represents an important challenge to neonatal adaptation, as the uterine and abdominal contractions during labour provoke intermittent hypoxia. Immediately after birth, puppies present venous mixed acidosis (low blood pH and high dioxide carbon saturation) and low but satisfactory Apgar scores. Thus, the combination of physiological hypoxia during birth and the initial effort of filling the pulmonary alveoli with oxygen results in anaerobiosis. As a neonatal adaptation follow-up, the Apgar analysis indicates a tachypnoea response after 1h of life, which leads to a shift in the blood acidbase status to metabolic acidosis. One hour is sufficient for canine neonates to achieve an ideal Apgar score; however, a haemogasometric imbalance persists. Dystocia promotes a long-lasting bradycardia effect, slows down Apgar score progression and aggravates metabolic acidosis and stress. The latest data reinforce the need to accurately intervene during canine parturition and offer adequate medical treatment to puppies that underwent a pathological labour.

Fatores maternos e neonatais associados ao mecônio no líquido amniótico em um centro de parto normal

OBJETIVO: Analisar a frequência e os fatores maternos e neonatais associados ao mecônio no líquido amniótico no parto. MÉTODOS: Estudo transversal com 2.441 nascimentos em um centro de parto normal hospitalar em São Paulo, SP, em março e abril de 2005. A associação entre mecônio no líquido amniótico e as variáveis independentes (idade materna, paridade, ter ou não cesariana prévia, idade gestacional, antecedentes obstétricos, uso de ocitocina no trabalho de parto, dilatação cervical na admissão, tipo do parto atual, peso do RN, índice de Apgar de 1º e 5º minutos de vida) foi expressa como razão de prevalência. RESULTADOS: Verificou-se mecônio no líquido amniótico em 11,9% dos partos; 68,2% desses foram normais e 38,8%, cesarianas. O mecônio esteve associado a: primiparidade (RP = 1,49; IC95% 1,29;1,73), idade gestacional ≥ 41 semanas (RP = 5,05; IC95% 1,93;13,25), ocitocina no parto (RP = 1,83, IC95% 1,60;2,10), cesariana (RP = 2,65; IC95% 2,17;3,24) e índice de Apgar < 7 no 5º minuto (RP = 2,96, IC95% 2,94;2,99). A mortalidade neonatal foi 1,6/1.000 nascidos vivos; mecônio no líquido amniótico foi encontrado em 50% das mortes neonatais e associado a maiores taxas de partos cirúrgicos. CONCLUSÕES: Emprego de ocitocina, piores condições do recém-nascido logo após o parto e aumento de taxas de cesariana foram fatores associados ao mecônio. A utilização rotineira de ocitocina no intraparto poderia ser revista por sua associação com mecônio no líquido amniótico.

Lethal respiratory failure and mild primary hypothyroidism in a term girl with a de novo heterozygous mutation in the TITF1/NKX2.1 gene

CONTEXT: Thyroid transcription factor 1 (TITF1/NKX2.1) is expressed in the thyroid, lung, ventral forebrain, and pituitary. In the lung, TITF1/NKX2.1 activates the expression of genes critical for lung development and function. Titf/Nkx2.1(-/-) mice have pituitary and thyroid aplasia but also impairment of pulmonary branching. Humans with heterozygous TITF1/NKX2.1 mutations present with various combinations of primary hypothyroidism, respiratory distress, and neurological disorders. OBJECTIVE: The objective of the study was to report clinical and molecular studies of the first patient with lethal neonatal respiratory distress from a novel heterozygous TITF1/NKX2.1 mutation. Participant: This girl, the first child of healthy nonconsanguineous French-Canadian parents, was born at 41 wk. Birth weight was 3,460 g and Apgar scores were normal. Soon after birth, she developed acute respiratory failure with pulmonary hypertension. At neonatal screening on the second day of life, TSH was 31 mU/liter (N <15) and total T(4) 245 nmol/liter (N = 120-350). Despite mechanical ventilation, thyroxine, surfactant, and pulmonary vasodilators, the patient died on the 40th day. RESULTS: Histopathology revealed pulmonary tissue with low alveolar counts. The thyroid was normal. Sequencing of the patient's lymphocyte DNA revealed a novel heterozygous TITF1/NKX2.1 mutation (I207F). This mutation was not found in either parent. In vitro, the mutant TITF-1 had reduced DNA binding and transactivation capacity. CONCLUSION: This is the first reported case of a heterozygous TITF1/NKX2.1 mutation leading to neonatal death from respiratory failure. The association of severe unexplained respiratory distress in a term neonate with mild primary hypothyroidism is the clue that led to the diagnosis.

Anthropometric measures as a predictor of cephalopelvic disproportion

This study compared three body measurements, height, hip width (bitrochanteric) and foot length, in 120 Hispanic women who had their first birth by cesarean section (N = 60) or by spontaneous vaginal delivery (N = 60). The objective of the study was to see if there were differences in these measurements that could be useful in predicting cephalopelvic disproportion. Data were collected from two public hospitals in Houston Texas over a 10 month period from December 1994 to October 1995. The statistical technique used to evaluate the measures was discriminant analysis.^ Women who delivered by cesarean section were older, shorter, had shorter feet and delivered heavier infants. There were no differences in the bitrochanteric widths of the women or in the mean gestational age or Apgar scores of the infants.^ Significantly more of the mothers and infants were ill following cesarean section delivery. Maternal illness was usually infection; infant illness was primarily infection or respiratory difficulties.^ Discriminant analysis is a technique which allows for classification and prediction to which group a particular entity will belong given a certain set of variables. Using discriminant analysis, with a probability of cesarean section 50 percent, the best combination to classify who would have a cesarean section was height and hip width, correctly classifying 74.2 percent of those who needed surgery. When the probability of cesarean section was 10 percent and probability of vaginal delivery was 90 percent, the best predictor of who would need operative delivery was height, hip width and age, correctly classifying 56.2 percent. In the population from which the study participants were selected the incidence of cephalopelvic disproportion was low, approximately 1 percent.^ With the technologic assistance available in most of the developed world, it is likely that the further pursuit of different measures and their use would not be of much benefit in attempting to predict and diagnose disproportion. However, in areas of the world where much of obstetrics is "hands on", the availability of technology extremely limited, and the incidence of disproportion larger, the use of anthropometric measures might be useful and of some potential benefit. ^

Incidence of preeclampsia in pregnant Swiss women.

QUESTION UNDER STUDY The epidemiology of preeclampsia in Switzerland is known only from a retrospective registry study. This analysis aimed to prospectively determine the incidence of preeclampsia in a cohort of pregnant women in Switzerland. METHODS Pregnant women presenting at gestational week 11-14 at their obstetrician's office were consecutively included and prospectively followed-up until the end of pregnancy. Ultrasound characteristics, blood pressure measurements, body mass index, and personal history were recorded. Duration of pregnancy, occurrence of preeclampsia, birth weight and Apgar scores were recorded as outcomes. RESULTS There were 1,300 pregnancies with follow-up available for analysis. Median age was 30 years (interquartile range [IQR] 27-33), median body mass index (BMI) 23.3 kg/m² (IQR 21.2-26.1), median systolic blood pressure 117 mm Hg (IQR 109-126) and median diastolic blood pressure 70 mm Hg (IQR 64-77). A total of 30 women developed preeclampsia, corresponding to an incidence of 2.31% (95% confidence interval [CI] 1.62%-3.28%). Of the women with preeclampsia, 6.66% (95% CI 2.04%-21.42%) had early-onset preeclampsia, 13.33% (95% CI 5.45%-29.83%) progressed to eclampsia, whereas 10% (95% CI 3.63%-28.75%) developed HELLP syndrome (haemolysis, elevated liver enzymes, low platelet count). Nulliparity and prior history of preeclampsia were more frequently seen in pregnancies with preeclampsia than in pregnancies without preeclampsia. BMI, as well as systolic and diastolic blood pressure were higher in pregnancies subsequently developing preeclampsia. CONCLUSION The incidence of preeclampsia in Switzerland is in line with frequencies observed elsewhere in the world. Extrapolation to a national level indicates that about 1,911 (range 1,340-2,713) preeclampsia cases per year can be expected to occur in Switzerland.

Cuidar no parto : prática de episiotomia

Enquadramento – A episiotomia é uma incisão feita no períneo para aumentar o canal vaginal com o objetivo de evitar outros traumas perineais durante o parto. No entanto, esta prática, por si só, já se considera um trauma perineal pelo corte em estruturas que podem desencadear problemas futuros. A Organização Mundial de Saúde (1996) recomenda a utilização limitada da episiotomia uma vez que não existem evidências credíveis de que a utilização generalizada ou de rotina desta prática tenha um efeito benéfico. Objetivos: Demonstrar evidência científica dos determinantes da prática de episiotomia seletiva em mulheres com parto normal/eutócico; identificar a prevalência de episiotomia; analisar os fatores (variáveis sociodemográficas, variáveis relativas ao recém-nascido, variáveis contextuais da gravidez e contextuais do parto) que influenciam na ocorrência de episiotomia. Métodos: O estudo empírico I seguiu a metodologia de revisão sistemática da literatura. Efetuou-se uma pesquisa na EBSCO, PubMed, SciELO, RCAAP de estudos publicados entre janeiro de 2008 e 23 de dezembro de 2014. Os estudos encontrados foram avaliados tendo em consideração os critérios de inclusão previamente estabelecidos. Dois revisores avaliaram a qualidade dos estudos a incluir utilizando a grelha para avaliação crítica de um estudo descrevendo um ensaio clínico prospetivo, aleatorizado e controlado de Carneiro (2008). Após avaliação crítica da qualidade, foram incluídos no corpus do estudo 4 artigos nos quais se obteve um score entre 87,5% e 95%. O estudo empírico II enquadra-se num estudo quantitativo, transversal, descritivo e retrospetivo, desenvolvido no serviço de Obstetrícia do Centro Hospitalar Cova da Beira, segundo um processo de amostragem não probabilística por conveniência (n = 382). A recolha de dados efetuou-se através da consulta dos processos clínicos das mulheres com idade ≥ 18 anos que tiveram um parto vaginal com feto vivo após as 37 semanas de gestação. Resultados: Evidência de que a episiotomia não deve ser realizada de forma rotineira, cujo uso deve restringir-se a situações clínicas específicas. A episiotomia seletiva, comparada com a episiotomia de rotina, está relacionada com um menor risco de trauma do períneo posterior, a uma menor necessidade de sutura e a menos complicações na cicatrização. Amostra constituída por 382 mulheres, na faixa etária dos 18-46 anos. Apenas, não se procedeu à episiotomia em 41,7% da amostra, apontando para a presença da episiotomia seletiva. Número significativo de mulheres com parto eutócico (80,5%), com sutura (95,0%), laceração de grau I (64,9%), dor perineal (89,1%) sujeitas a episiotomia (58,3%). A maioria dos recém-nascidos nasceram com peso normal (92,3%), com um valor expressivo de mulheres sujeitas a episiotomia (91,4%). Ainda se constatou a existência de casos, apesar de reduzidos, em que o recém-nascido nasceu macrossómico (5,4%), tendo-se recorrido igualmente a esta prática. Não há uma associação direta entre a realização de episiotomia e os scores do APGAR. Conclusão: Face a estes resultados e com base na evidência científica disponível que recomenda, desde há vários anos, que se faça um uso seletivo da episiotomia, sugere-se que os profissionais de saúde estejam mais despertos para esta realidade, de modo a que se possam anular as resistências e as barreiras de mudanças por parte dos mesmos face ao uso seletivo da episiotomia. Para promover essa mudança de comportamentos é importante não só mostrar as evidências científicas, bem como transpô-las para a prática, capacitando os profissionais de saúde, sobretudo os enfermeiros, na sua atuação. Palavras-chave: Parto Normal/eutócico; Episiotomia; Episiotomia seletiva; Episiotomia de rotina.

Bariatric surgery in women of child-bearing age, timing between an operation and birth, and associated perinatal complications

Thesis (Master's)--University of Washington, 2016-06

Determining the fetal scalp lactate level that indicates the need for intervention in labour

Background: Fetal scalp lactate testing has been shown to be as useful as pH with added benefits. One remaining question is What level of lactate should trigger intervention in the first stage of labour?' Aims: This study aimed to establish the lactate level in the first stage of labour that indicates the need for intervention to ensure satisfactory outcomes for both babies and mothers. Methods: A prospective study at Mater Mothers' Hospital, Brisbane, Australia, a tertiary referral centre. One hundred and forty women in labour, with non-reassuring fetal heart rate traces, were tested using fetal blood scalp sampling of 5 mu L of capillary blood tested on an Accusport (Boeringer, Mannheim, East Sussex, UK) lactate meter. Decision to intervene in labour was based on clinical assessment plus a predetermined cut off. Main outcome measures were APGAR scores, cord arterial pH, meconium stained liquor and Intensive Care Nursery admission. Results: Two-graph receiver operating characteristic (TG-ROC) analysis showed optimal specificity, and sensitivity for predicting adverse neonatal outcomes was a scalp lactate level above 4.2 mmol/L. Conclusions: Fetal blood sampling remains the standard for further investigating-non-reassuring cardiotocograph (CTG) traces. Even so, it is a poor predictor of fetal outcomes. Scalp lactate has been shown to be at least as good a predictor as scalp pH, with the advantages of being easier, cheaper and with a lower rate of technical failure. Our study, found that a cut off fetal scalp lactate level of 4.2 mmol/L, in combination with an assessment of the entire clinical picture, is a useful tool in identifying those women who need intervention.

Validating the functional capacity index : a comparison of predicted versus observed total body scores

Background: The Functional Capacity Index (FCI) was designed to predict physical function 12 months after injury. We report a validation study of the FCI. Methods: This was a consecutive case series registered in the Queensland Trauma Registry who consented to the prospective 12-month telephone-administered follow-up study. FCI scores measured at 12 months were compared with those originally predicted. Results: Complete Abbreviated Injury Scale score information was available for 617 individuals, of whom 587 (95%) could be assigned at least one FCI score (range, 1-17). Agreement between the largest predicted FCI and observed FCI score was poor ([kappa] = 0.05; 95% confidence interval, 0.00-0.10) and explained only 1% of the variability in observed FCI. Using an encompassing model that included all FCI assignments, agreement remained poor ([kappa] = 0.05; 95% confidence interval, -0.02-0.12), and the model explained only 9% of the variability in observed FCI. Conclusion: The predicted functional capacity poorly agrees with actual functional outcomes. Further research should consider including other (noninjury) explanatory factors in predicting FCI at 12 months.