Lamellar Bodies Count (LBC) as a Predictor of Fetal Lung Maturity in Preterm Premature Rupture of Membranes Compared to Neonatal Assessment

Background: Respiratory distress syndrome (RDS) is a major cause of neonatal morbidity and mortality, affecting approximately 1% of all live births and 10% of all preterm infants. Lamellar bodies represent a storage form of pulmonary surfactant within Type II pneumocytes, secretion of which increases with advancing gestational age, thus enabling prediction of the degree of FLM. Preterm premature rupture of membranes (PPROM) complicates approximately 1/3 of all preterm births. Birth within 1 week is the most likely outcome for any patient with PPROM in the absence of adjunctive treatments. Respiratory distress has been reported to be the most common complication of preterm birth. Sepsis, intraventricular haemorrhage, and necrotizing enterocolitis also are associated with prematurity, but these are less common near to term. Objective: To assess the efficacy of the amniotic fluid lamellar body counting from a vaginal pool in predicting fetal lung maturity in women with preterm premature rupture of membranes. Methods: This study was conducted at Ain Shams University Maternity Hospital in the emergency ward from January 2019 to September 2019. It included 106 women with singleton pregnancies, gestational age from 28 - 36 weeks with preterm premature rupture of membranes. This study is designed to assess the efficacy of the amniotic fluid lamellar body counting (LBC) from a vaginal pool in predicting fetal lung maturity in women with preterm premature rupture of membranes. Results: The current study revealed a highly significant increase in the lamellar body count in cases giving birth to neonates without RDS compared to that cases giving birth to neonates with RDS. Also, no statistically significant difference between LBC and age, parity and number of previous miscarriages in the mother was found. Gestational age at delivery was significantly lower among cases with respiratory distress. Steroid administration was significantly less frequent among cases with respiratory distress. However, lamellar bodies had high diagnostic performance in the prediction of respiratory distress. Conclusion: Lamellar body count (LBC) is an effective, safe, easy, and cost-effective method to assess fetal lung maturity (FLM). It does not need a highly equipped laboratory or specially trained personnel, it just needs the conventional blood count analyzer. Measurement of LBC is now replacing the conventional Lecithin/Sphyngomyelin L/S ratio. LBC cut-off value of ≤42.5 × 103/μL can be used safely to decide fetal lung maturity with sensitivity of 95.7% and specificity of 97.6%.

Previable Premature Rupture of Membranes in Dichorionic Diamniotic Twin Gestation, Loss of Leading Twin, Emergency Cervical Cerclage and Ceaserean Delivery at Term

Introduction: Multiple pregnancies have a higher risk of premature delivery and a weakened cervix has been associated with it. In most cases, emergency cerclage has proved to be beneficial as the birth of the first twin is usually followed by the unavoidable delivery of the second twin and most fetus dies shortly after delivery. Studies have noted that delayed delivery of the second fetus in a twin pregnancy is an effective management choice and the use of cervical cerclage after the first delivery is associated with a longer inter-delivery interval. We present a case of previable premature rupture of membrane of a dichorionic diamniotic twin gestation leading to the loss of the leading twin and subsequently having emergency cervical cerclage for the second twin and caesarean delivery at term. Case Presentation: She was a case of a 29 years old, G6P1+4 with 1 living child at a gestational age of 17 weeks plus 5 days who initially was diagnosed with dichorionic diamniotic twin gestation following an early ultrasound but presented with a history of bleeding and passage of liquor per vaginam. Ultrasound done on admission showed cervical funneling and a stable state of the second twin. She subsequently had emergency cervical cerclage after stabilization on account of previable premature rupture of membrane of a dichorionic diamniotic twin gestation with the loss of the leading twin. A repeat ultrasound done prior to discharge showed closed cervical os and a good state of the fetus. She then had elective caesarean delivery at term with a good feto-maternal outcome. Conclusion: Emergency cervical cerclage should be part of the options of management after stabilization in cases of previable premature rupture of membrane in a dichorionic or multichoronic gestation so as to save the viable once.

The Study of Vaginal Fluid Urea, Creatinine, B-HCG and Placental Alpha-1 Microglobulin in Diagnosis of Premature Rupture of Membranes

Purpose: To evaluate and compare the reliability, accuracy and the cost benefit ratio of vaginal washing fluid urea, creatinine, Beta Human Chorionic Gonadotropin (β-HCG) and placental alpha Microglobulin-1 (PAMG-1) for diagnosis of premature rupture of membranes (PROM). Material and Methods: A diagnostic study conducted on 70 patients. The patients were divided into three groups: Group A (n = 25): (Confirmed PROM group) patients who were either in labor or not in labor, Gestational age was from 24 weeks onwards and fulfilled the following criteria and/or two of these criteria with low AFI positive pooling, positive nitrazine paper test, positive fern test. Group B (n = 25): (Suspected PROM group) patients who fulfilled the following criteria: Patients with fluid leakage complaint with negative pooling and/or negative nitrazine paper test and/or negative fern test. Group C (n = 25): (Control group with no PROM) patients that were admitted to prenatal clinic for their regular prenatal control visit with 24 - 42 weeks of gestational age without any complaint or complication and with negative pooling, negative nitrazine paper test and/or negative fern test. The vaginal washing fluid urea, creatinine, Beta-Human Chorionic Gonadotropin (β-HCG) and placental alpha Microglobulin-1 (PAMG-1) were determined for diagnosis of premature rupture of membranes (PROM). Results: PAMG-1 detection in cervico vaginal discharge was a very good test for diagnosis of PROM with high sensitivity, specificity, positive predictive value, negative predictive value, accuracy and P-value (96%, 100%, 100%, 95.84%, 97.78% and <0.0001 respectively). Urea and Creatinine is the second option in diagnosis of PROM with high sensitivity, and specificity after PAMG-1 with a privilege of low cost than PAMG-1. Furthermore they were more accurate than β-HCG. Conclusion: Detection of PAMG-1 in cervico vaginal discharge is promising in diagnosis of PROM & especially in those cases of suspected PROM and it should be done as a worse trial in every case of suspected PROM. Urea and Creatinine is the second option in diagnosis of PROM with high sensitivity, and specificity after PAMG-1 with a privilege of low cost than PAMG-1. Also they were more accurate than β-HCG and they can be used if PAMG-1 is not available for detection of doubtful PROM cases.

Accuracy of Transvaginal Ultrasound in Prediction of Latency Period in Women with Preterm Premature Rupture of Membranes

Background: Preterm prelabor rupture of membranes (PPROM) is a major cause of Pretem Birth (PTB), Pretem Birth (PTB) is the most significant cause of perinatal morbidity and mortality worldwide. Cervical length (CL), posterior uterocervical angle (PUCA) and anterior uterocervical angle (AUCA) have been postulated in several studies to have an important role in prediction of PTB. Up to our knowledge, this is the first study that combines the three cervical parameters in prediction of latency period in women with PPROM. Aim of the Work: To assess the accuracy of cervical length, posterior uterocervical angle and anterior uterocervical angle in prediction of latency period in women with Preterm prelabor rupture of membranes. Subjects and Methods: A Prospective cohort study on 205 women with PPROM was held at Ain Shams University Maternity Hospital, a transvaginal ultrasound was performed to measure cervical length, posterior uterocervical angle, anterior uterocervical angle. Results: A total of 205 pregnant women with PPROM were included in this study, the latency grade was within 2 days in 57 (27.8%) of cases while was after 2 days in 148 (72.2%) of cases. As regards cervical length cut-off value 25.0 mm, sensitivity was 78.9%, specificity was 65.5%, posterior uterocervical angle cut-off value 108.0°, sensitivity was 93.0%, specificity was 60.1%, and anterior uterocervical angle cut-off value 106.0°, sensitivity was 93.0%, specificity was 71.6%. Conclusion: The combination of cervical length (CL), posterior uterocervical angle (PUCA) and anterior uterocervical angle (AUCA) measurements greatly predicts the latency period in women with PPROM, and Anterior uterocervical angle (AUCA) ≥ 106.0° had the highest diagnostic value in predicting latency period within two days.

Expectant Management of Preterm Ruptured Membranes before 34 Gestational Weeks at the University Hospital of Kinshasa, a Tertiary Referral Hospital in the Democratic Republic of Congo

Premature Rupture of Membranes (PROM) with the resulting prematurity remains a major public health issue in the Democratic Republic of Congo (DRC). This study aimed to assess expectant management of PPROM before 34 weeks at the university hospital of Kinshasa. We conducted a retrospective analysis of expectantly managed PROM before 34 weeks between January 2008 and December 2018. Maternal and fetal outcomes were collected, and all data were analyzed using the SPSS 23.0 software. Of the 113 patients included in the study, 2.6% were diagnosed with PROM before 34 weeks. We observed prolongation of the pregnancy duration;the median latency period was eight days, and the average gestational age at delivery of 32.85 ± 2.5 weeks. Chorioamnionitis (23%), severe oligoamnios (7%), and acute fetal distress (4%) were complications observed during the latency period. In the postpartum period, endometritis (6.2%), neonatal jaundice (39.8%), anemia (25.7%), ulcerative necrotizing enterocolitis (6.2%), cerebromeningeal hemorrhage (5.3%), and acute respiratory distress syndrome (4.4%) were complications observed. The risk of infection during the latency period was significantly associated with irregular (P = 0.045) or lack (P = 0.006) antenatal care (ANC) attendances and C-Reactive Protein (CRP) results 6 (P = 0.013). The risk of neonatal death was significantly associated to infection during the latency period (P = 0.011), irregular (P = 0.009) or lack of ANC (P = 0.000) attendances, Birth weight g (P = 0.039) as well as Gestational age at birth between 28 to 30 Weeks (S) (P = 0.021). These findings report first-time pregnancy outcomes related to the management of PPROM before 34 weeks in our setting. We found that the conservative attitude adopted allowed the prolongation of pregnancies, reducing the risks associated with prematurity. Nevertheless, attendance in good quality ANC could reduce the frequency of PROM and related adverse outcomes.

Successful Management of Preterm Premature Rupture of Membrane in Second Trimester: A Case Report and Literature Review

The preterm premature rupture of membranes occurring in early pregnancy at less than 23 - 24 weeks (prior to fetal viability), has higher risk for early preterm delivery, and therefore, the poorer the prognosis with poor chance of neonatal survival and a high rate of severe, long-term neonatal morbidity among survivors. In such cases in absence of overt evidence of intrauterine infection at the time of diagnosis termination of pregnancy or expectant management is generally offered modality of treatment, the prior being commonly preffered. When expectant management is instituted, it is very rare that spontaneous resealing of the membranes occurs with the outcome that is equivocal to normal pregnancy. The presented case is an example of this rare happening. A 25-year-old, mangolian, primigravida at 20 weeks of pregnancy had spontaneous preterm premature rupture of membranes. After 8 days of expectant management, she had cessation of amniotic fluid leak and could continue pregnancy till term with normal feto-maternal outcome at 37 weeks of pregnancy. The risk of infection increases with prolongation of latency period but in this case, the latency period was prolonged for more than 16 weeks and there was no evidence of infection, with normal feto-maternal outcome at term. This is the first case of its kind happened in our hospital and deserves to be reported. It is expected that this article will reveal the possibility of resealing of spontaneous preterm premature rupture of membrane with proper expectant management.

Maternal and fetal outcomes in term premature rupture of membrane

BACKGROUND: Premature rupture of membrane(PROM) is linked to significant maternal prenatal mortalities and morbidity. In Ethiopia, where maternal mortality is still high, the maternal and fetal outcomes in PROM is very important to decrease maternal and child mortality and for better management and prevention of complications. Thus, this study aimed to detect the maternal and fetal outcomes and associated factors in term PROM at Mizan-Aman General Hospital, south-west Ethiopia.METHODS: A retrospective cross sectional study was conducted using data available at MizanAman General Hospital during a period of 3 years(January 2011 to December 2013). We examined records of 4 525 women who gave birth in the hospital; out of these women, 185 were diagnosed with term PROM and all of them were included in the study. The data of these women were collected using a checklist based on registration books. The data were analyzed using SPSS version 20.0 statistical package. The association between independent and dependent variables was assessed by bivariate and multiple logistic regression analyses. 95%CI and P value less than 0.05 were considered statistically signifi cant.RESULTS: Of the 4 525 women who gave birth in the hospital, 202 were complicated by term PROM. About 22.2% of the women showed unfavorable maternal outcomes. The most common cause of maternal morbidity and mortality was puerperal sepsis. About 33.5% of neonates experienced unfavorable outcomes. The duration of PROM >12 hours(AOR=5.6, 95%CI 1.3–24.1) latency >24 hours(AOR=2.8, 95%CI 1.7–11.8), residing in rural areas(AOR=4.2, 95%CI 3.96–29.4) and birth weight less than 2 500 g were associated with unfavorable outcomes.CONCLUSION: Women residing in rural areas, long latency, and neonates with birth weight less 2 500 g may have unfavorable outcomes. Therefore, optimum obstetric and medical care is essential for the reduction of the devastating complications related to disorders.

Premature Rupture of Membrane and Neonatal Infection

Premature rupture of membrane (PROM) is obstetric dilemma that carries risk of neonatal and maternal complications. PROM has controversy in management although many factors affect the outcome of PROM.

Three-Year Outcome of Very Low Birth Weight Infants in Conservatively Managed Premature Rupture of Membranes

Aim: To elucidate the outcome for very low birth weight infants delivered after preterm premature rupture of membranes (PPROM) managed conservatively, and to determine the prognostic value of perinatal factors for long-term outcome. Methods: Perinatal data were collected from medical records for singleton live-birth infants delivered between 1991 and 2008 after conservatively managed PPROM. Cases of congenital anomalies and chromosomal aberrations were excluded. Poor outcome was defined as a composite measure of death, neurological morbidity including cerebral palsy, or neurodevelopmental delay. Associations between perinatal factors and poor outcome at the corrected age of 3 were estimated using logistic regression analysis. Results: After the exclusion, 356 infants meeting the study criteria were identified, 26 cases were lost to follow-up, and 330 were eligible at 3 years. The mortality rate was 10% and the incidence of neurological morbidities was 12%. Logistic regression analysis revealed gestational age at birth [adjusted odds ratio (aOR) 0.815], and five-minute Apgar scores (aOR 0.521) were independent predictors for poor outcome. Conclusion: When PPROM was managed conservatively, 22% of VLBW infants had a poor outcome at corrected age of 3 years. Early gestational age at birth and low Apgar scores were associated with poor outcome.

Support Epidemiology and Prognosis of Premature Rupture of Membranes in Pikine National Hospital Center

Premature rupture of membranes (PROM) complicates 3% of preterm pregnancies and occurs in 60% to 80% of term pregnancies. However, its management remains largely controversial. The objective of this study was to establish the epidemiological profile, to study the management and the prognosis of Premature rupture of membranes (PROM) in our practice. Patients and methods: It was a prospective, descriptive and analytical study from May 1st 2016 to January 31st 2017 at the Pikine National Hospital Center. The target population consisted of all patients received at the hospital with premature rupture of membranes and who had given birth in the structure. The variables studied were: marital status, mode and reason for admission;risk factors;antecedents;prenatal care;the clinical and paraclinical examinations;support and immediate maternal and fetal neonatal complications. Results and comments: The mean maternal age was 27.34 years and the majority of women were aged between 18 and 39 years (94.4%). Fifty-one point three percent of patients were primiparous, large multiparous represented only 2.5%. The majority of patients (385 patients or 66.9%) had consulted in the first 12 hours following the onset of fluid flow. For 20.1% of them this flow was associated with uterine contractions. Hidden risk factors were dominated by the twin pregnancy. The blood count showed that 38.8% of patients had leukocytosis and CRP was positive in 18.3% of patients. An ampicillin-based antibiotics was established in 42.6% of cases, corticosteroid therapy in 5.2% and 1% in tocolysis. An expectation was adopted in 65.7% of cases, induction of labor in 7.3% and a cesarean section immediately in 27% of cases. In total, 65.7% of patients had vaginal delivery and 34.3% cesarean. The perinatal mortality rate was 3.6% or 22 newborns on 610. Two cases of endometritis were observed and one case of immediate postpartum hemorrhage. No maternal deaths were recorded. Conclusion: These results show that the prognosis of premature rupture of membranes remains favorable in our practice. To improve this prognosis, we recommend sensitization of patients during prenatal care regarding signs of danger, a systematic bacteriological sample from all pregnant at the end of their pregnancy and the health personnel to direct patients’ references to structures in case of PROM.

Heterotopic pregnancy after assisted reproductive techniques with favorable outcome of the intrauterine pregnancy:A case report

BACKGROUND Heterotopic pregnancy(HP)is a rare condition in which both ectopic and intrauterine pregnancies occur.HP is uncommon after natural conception but has recently received more attention due to the widespread use of assisted reproductive techniques(ART)such as ovulation promotion therapy.CASE SUMMARY Here,we describe a case of HP that occurred after ART with concurrent tubal and intrauterine singleton pregnancies.This was treated successfully with surgery to preserve the intrauterine pregnancy,resulting in the birth of a low-weight premature infant.This case report aims to increase awareness of the possibility of HP during routine first-trimester ultrasound examinations,especially in pregnancies resulting from ART and even if multiple intrauterine pregnancies are present.CONCLUSION This case alerts us to the importance of comprehensive data collection during regular consultations.It is important for us to remind ourselves of the possibility of HP in all patients presenting after ART,especially in women with an established and stable intrauterine pregnancy that complain of constant abdominal discomfort and also in women with an unusually raised human chorionic gonadotropin level compared with simplex intrauterine pregnancy.This will allow symptomatic and timeous treatment of patients with better results.

FPR1 Antagonist (BOC-MLF) Inhibits Amniotic Epithelial-mesenchymal Transition

Objective:Premature rupture of membranes(PROM)is a common pregnancy disorder that is closely associated with structural weakening of fetal membranes.Studies have found that formyl peptide receptor 1(FPR1)activates inflammatory pathways and amniotic epithelial-mesenchymal transition(EMT),stimulates collagen degradation,and leads to membrane weakening and membrane rupture.The purpose of this study was to investigate the anti-inflammatory and EMT inhibitory effects of FPR1 antagonist(BOC-MLF)to provide a basis for clinical prevention of PROM.Methods:The relationship between PROM,FPR1,and EMT was analyzed in human fetal membrane tissue and plasma samples using Western blotting,PCR,Masson staining,and ELISA assays.Lipopolysaccharide(LPS)was used to establish a fetal membrane inflammation model in pregnant rats,and BOC-MLF was used to treat the LPS rat model.We detected interleukin(IL)-6 in blood from the rat hearts to determine whether the inflammatory model was successful and whether the anti-inflammatory treatment was effective.We used electron microscopy to analyze the structure and collagen expression of rat fetal membrane.Results:Western blotting,PCR and Masson staining indicated that the expression of FPR1 was significantly increased,the expression of collagen was decreased,and EMT appeared in PROM.The rat model indicated that LPS caused the collapse of fetal membrane epithelial cells,increased intercellular gaps,and decreased collagen.BOC-MLF promoted an increase in fetal membrane collagen,inhibited EMT,and reduced the weakening of fetal membranes.Conclusion:The expression of FPR1 in the fetal membrane of PROM was significantly increased,and EMT of the amniotic membrane was obvious.BOC-MLF can treat inflammation and inhibit amniotic EMT.

Changes of cytokines and matrix metalloproteinases in patients with premature rupture of chorioamnion and its clinical significance

Objective: To investigate changes of cytokines and matrix metalloproteinases in patients with premature rupture of membranes (PROM) with chorioamnionitis (HCA) and its clinical significance. Methods: A total of 80 pregnant women with premature rupture of membranes were selected as PROM group and 80 normal pregnant women as control group. The PROM group was subgrouped into HCA group (n=45) and non HCA group (n=35) according to the presence or absence of HCA. Matrix metalloproteinases (MMP-8, MMP-9) and cytokines (IL-8, IL-10, TNF-α) in pregnant women were compared. Results: The level of IL-8, TNF-αwere (420.45±110.26) ng/L, (413.53±125.19) ng/L in the PROM group, which were significantly higher than those in the control group;the levels of IL-10 were(332.07±48.12) ng/L in the PROM groups, which were significantly lower than the control group. The levels of IL-8 and TNF-α in PROM combined with HCA group were significantly higher than those in non-HCA group, the levels of IL-10 were significantly lower than those in non-HCA group. The level of MMP-8, MMP-9 were (11.02±2.48) ng/mL, (648.42±73.35) ng/L in the PROM group, which were significantly higher than the control group. The levels of MMP-8, MMP-9 in PROM combined with HCA were significantly higher than those in non-HCA group with the difference was statistically significant. Conclusion: When premature rupture of membranes and chorioamniositis occurring, pregnant women were accompanied by the level changes of cytokines and matrix metalloproteinases, so timely monitoring of these indicators can offer basis for the early diagnosis the premature rupture of membranes and chorioamnionitis, which will help to reduce morbidity and mortality of the perinatal pregnant women and newborns with important clinical value.

The AL-SENSE Test is Reliable for Detection of Second Trimester Amniotic Fluid

Objective: To validate the reliability and stability of the AL-SENSE panty-liner for detection of amniotic fluid in the second trimester. Study design: Amniotic fluid drawn during amniocentesis between 16 to 23 weeks of gestation was used for the study.100 μl and 400 μl of amniotic fluid, were dripped onto two panty liners, respectively. After 5 minutes the indicator strip was removed from the AL-SENSE, dried and examined. The color was recorded at time 0 and 5 minutes, and then every 10 minutes for the first 30 minutes, then at 1, 2, 6 and 12 hours. Results: 50 women were enrolled and 49 completed the study. 100% of both volume samples changed color from yellow to blue during the first 5 minutes and remained stable after twelve hours of follow-up. In the 100 μl subgroup, seven of the 49 samples (14.3%) had a delayed color change and in the 400 μl subgroup one of 49 (2.04%) had a delay in change of color. Conclusion: Amniotic fluid drawn during amniocentesis at weeks 16 - 23 of gestation have a positive, stable staining effect on the AL-SENSE panty liner. Hence, AL-SENSE may be reliable for detection of amniotic fluid leakage during the second trimester.

1例未足月胎膜早破青霉素过敏患者抗菌药物应用的药学监护

1例29岁有青霉素过敏史的妊娠女性,因“停经31+周,阴道流液5 h”入院。患者诊断为胎膜早破,有预防性应用抗菌药物指征。临床药师了解患者过敏史后,考虑发生青霉素速发型过敏反应风险较低,建议试行青霉素皮试或使用头孢呋辛。患者拒绝青霉素皮试,头孢呋辛皮试阳性。调整为万古霉素(1 g,每8 h 1次,静脉滴注)联合阿奇霉素(首次500 mg口服,第2天250 mg 1次·d^(-1),口服,疗程4 d),行B族链球菌(GBS)筛查及宫腔细菌培养。GBS筛查阴性,建议停用万古霉素。宫腔细菌培养报大肠埃希菌,结合患者症状体征、检验指标考虑污染可能性大,继续使用阿奇霉素。患者羊水较少,予引产后分娩,母儿情况可。阿奇霉素使用5d后停用,患者出院。产后2周随访母儿情况良好。

胎膜早破孕妇阴道微生态和胎盘分离菌及耐药性分析

目的 比较胎膜早破和正常破裂孕妇孕晚期(孕35~37周)阴道微生态、胎盘拭子细菌分布和耐药性情况,为临床预防和治疗提供病原学依据。方法 收集甘肃省妇幼保健院产科2020年1月1日至2022年6月30日胎盘拭子培养结果,将培养阳性的孕妇分成胎膜早破组和正常破裂组,比较两组基本临床特征及孕晚期阴道微生态、胎盘分离菌和药敏结果。结果 两组孕周、年龄、细菌性阴道病和正常微生态情况差异有统计学意义(P<0.05);多因素Logistic回归分析显示孕周(β=-0.711,OR=0.491)和正常微生态(β=-1.412,OR=4.103)与胎膜早破发生呈负相关,年龄(β=0.076,OR=1.079)呈正相关,细菌性阴道病的差异无统计学意义(P>0.05)。两组胎盘主要分离菌为革兰阴性杆菌,差异无统计学意义(P>0.05),以大肠埃希菌为主,检出率差异有统计学意义(P<0.05),胎膜早破组产超广谱β-内酰胺酶比例较高,对氨苄西林、头孢类耐药性高,差异有统计学意义(P<0.05);其次是革兰阳性球菌(粪肠球菌和无乳链球菌为主),差异无统计学意义(P>0.05)。无乳链球菌对青霉素类、糖肽类等敏感,对喹诺酮类耐药率较高;粪肠球菌对青霉素类、糖肽类、恶唑烷酮类等敏感,对红霉素和克林霉素的耐药性较高。结论 胎膜早破组年龄偏大且孕周小,孕晚期易发生阴道微生态异常,其胎盘拭子大肠埃希菌检出率、对青霉素和头孢类抗生素耐药性较高。

细胞焦亡相关蛋白在胎膜早破孕妇胎膜组织中的表达及其与妊娠结局的关系

目的:探究细胞焦亡相关蛋白半胱氨酸天冬氨酸特异性蛋白酶-1(cysteinyl aspartate specific proteinase,Caspase-1)和核苷酸结合寡聚化结构域样受体蛋白3(nucleotide-binding oligomerization domain-like receptor protein 3,NLRP3)在胎膜早破孕妇胎膜组织中的表达及其与妊娠结局的关系。方法:选择2020年1月至2023年1月于常熟市中医院妇产科就诊并分娩的胎膜早破孕妇135例作为观察组,另选择同期产检并分娩的健康孕妇135例作为对照组,比较两组孕妇胎膜组织中NLRP3 mRNA和Caspase-1 mRNA表达。依据妊娠结局将135例胎膜早破孕妇分为妊娠不良组(n=50)和妊娠良好组(n=85),通过单因素和多因素Logistic分析胎膜早破孕妇妊娠不良的独立危险因素;应用Logistic回归模型结合限制性立方样条(restricted cubic splines,RCS)分析胎膜早破孕妇胎膜组织中细胞焦亡相关蛋白表达量与妊娠不良的剂量反应关系;依据独立因素构建列线图预测模型,并对模型进行验证。结果:观察组胎膜组织中NLRP3 mRNA和Caspase-1 mRNA表达显著高于对照组(P<0.001)。就诊时间≥2 h、生殖道感染、NLRP3 mRNA和Caspase-1 mRNA高表达是胎膜早破孕妇妊娠结局不良的独立危险因素(P<0.05);RCS结果显示,胎膜早破孕妇胎膜组织中NLRP3 mRNA、Caspase-1 mRNA表达量与妊娠结局不良呈非线性剂量反应关系,在NLRP3 mRNA表达量为1.20(OR=1.818,95%CI:1.673~1.932)和Caspase-1 mRNA表达量为1.25(OR=2.735,95%CI:1.132~3.821)处发生妊娠结局不良的风险最大;构建的列线图预测模型具有良好的区分度、准确性和临床适用性。结论:NLRP3 mRNA和Caspase-1 mRNA在胎膜早破孕妇胎膜组织中呈高表达,二者是胎膜早破孕妇妊娠结局不良的独立危险因素,随着表达量升高,胎膜早破孕妇妊娠不良的危险性也随之升高。

A Bayesian Stepwise Discriminant Model for Predicting Risk Factors of Preterm Premature Rupture of Membranes： A Case-control Study

Background： Preterm premature rapture of membrane （PPROM） can lead to serious consequences such as intrauterine infection, prolapse of the umbilical cord, and neonatal respiratory distress syndrome. Genital infection is a very important risk which closely related with PPROM. The preliminary study only made qualitative research on genital infection, but there was no deep and clear judgment about the effects of pathogenic bacteria. This study was to analyze the association of in fections with PPROM in pregnant women in Shaanxi, China, and to establish Bayesian stepwise discriminant analysis to predict the incidence of PPROM. Methods： In training group, the 112 pregnant women with PPROM were enrolled in the case subgroup, and 108 normal pregnant women in the control subgroup using an unmatched case-control method. The sociodemographic characteristics of these participants were collected by face-to-face interviews. Vaginal excretions fiom each participant were sampled at 28 36-6 weeks of pregnancy using a sterile swab. DNA corresponding to Chlamrdia trachomalix （CT）, Ureaplasma urealyticwn （UU）, Candida albicans, group B streptococci （GBS）, herpes simplex virus- 1 （HSV-1）, and HSV-2 were detected in each participant by real-time polymerase chain reaction. A model of Bayesian discriminant analysis was established and then verified by a mull）center validation group that included 500 participants in the case subgroup and 5（10 participants in the control subgroup from five different hospitals in the Shaanxi province, respectively. Results： The sociological characteristics were not significantly different between the case and control subgroups in both training and validation groups （all P 〉 0.05）. In training group, the infection rates of UU （11.6% vs. 3.7%）, CT （17.0% vs. 5.6%）, and GBS （22.3% vs. 6.5%） showed statistically different between the case and control subgroups （all P 〈 0.05）, Iog-transfomacd quantification of UU, CE GBS, and HSV-2 showed statistically different between the case and control subgroups （P 〈 0.05）. All etiological agents were introduced into the Bayesian stepwise discriminant model showed that UU, CT, and GBS infections were the main contributors to PPROM, with coe｜＇ficients of 0.441,3.347, and 4.126, respectively. The accuracy rates of the Bayesian stepwise discriminant analysis between the case and control subgroup were 84.1% and 86.8% in the training and validation groups, respectively. Conclusions： This study established a Bayesian stepwise discriminant model to predict the incidence of PPROM. The UU, CT, and GBS infections were discriminant factors for PPROM according to a Bayesian stepwise discriminant analysis. This model could provide a new method for the early predicting of PPROM in pregnant women.

Cesarean section does not affect neonatal outcomes of pregnancies complicated with preterm premature rupture of membranes

Background:Preterm premature rupture of membranes(PPROM)is associated with high neonatal morbidity and mortality.However,the influences of cesarean section(CS)on neonatal outcomes in preterm pregnancies complicated with PPROM are not well elucidated.The aim of this study was to investigate the influence of delivery modes on neonatal outcomes among pregnant women with PPROM.Methods:A retrospective cross-sectional study was conducted in 39 public hospitals in 14 cities in the mainland of China from January 1st,2011 to December 31st,2011.A total of 2756 singleton pregnancies complicated with PPROM were included.Adverse neonatal outcomes including early neonatal death,birth asphyxia,respiratory distress syndrome(RDS),pneumonia,infection,birth trauma,and 5-min/10-min Apgar scores were obtained from the hospital records.Binary variables and ordinal variables were respectively calculated by binary logistic regressions and ordinal regression.Numerical variables were compared by multiple linear regressions.Results:In total,2756 newborns were involved in the analysis.Among them,1166 newborns(42.31%)were delivered by CS and 1590 newborns belonged to vaginal delivery(VD)group.The CS proportion of PPROM obviously increased with the increase of gestational age(x2=5.014,P=0.025).Compared with CS group,VD was associated with a higher risk of total newborns mortality(odds ratio[OR],2.38;95%confidence interval[Cl],1.102-5.118;P=0.027),and a lower level of pneumonia(OR,0.32;95%Cl,0.126-0.811;P=0.016).However,after multivariable adjustment and stratification for gestational age,only pneumonia was significantly related with CS in 28 to 34 weeks group(OR,0.34;95%Cl,0.120-0.940;P=0.038).There were no differences regarding to other adverse outcomes in the two groups,including neonatal mortality,birth asphyxia,Apgar scores,RDS,pneumonia,and sepsis.Conclusions:The proportion of CS of pregnant women with PPROM was very high in China.The mode of delivery does not affect neonatal outcomes of pregnancies complicated with PPROM.

孕妇孕晚期生殖道GBS感染对胎膜早破、妊娠结局影响

目的:院内妊娠晚期孕妇生殖道B族链球菌(GBS)感染情况调查并探究对胎膜早破、妊娠结局的影响。方法:选取2021年6月-2023年7月于本院定期产前检查的妊娠晚期孕妇3970例GBS感染检测,根据感染情况分为感染组和非感染组,比较两组胎膜早破发生率及妊娠不良结局。结果:3970例孕妇中103例GBS感染,感染率2.6%,纳入感染组,非感染孕妇中随机选取103例纳入非感染组;感染组年龄≤30岁组感染率(68.0%)高于>30~35岁组及>35岁组,感染组胎膜早破发生率(18.5%)高于非感染组(4.9%),绒毛膜羊膜炎(6.8%)、新生儿肺炎(13.6%)、胎儿生长发育迟缓(8.7%)、新生儿感染(7.8%)、胎儿宫内窘迫(9.7%)发生率均高于非感染组(0、4.9%、1.0%、1.0%、1.9%)(均P<0.05);两组产妇分娩期发热、新生儿黄疸发生率未见差异(P>0.05)。结论:孕晚期孕妇发生GBS感染增加胎膜早破及不良妊娠结局发生风险,临床应及时采取措施治疗干预。