Spinal Hypotension and Time from Spinal-to-Delivery in Scheduled Cesarean Deliveries: Association with Neonatal Acidosis.

OBJECTIVE: This work aimed to study the effect of sustained hypotension after spinal on neonatal acidosis and adverse outcomes in those undergoing scheduled cesarean delivery (CD) with universal prophylactic vasopressor exposure and to examine differences in spinal-to-delivery time by neonatal acidosis status. STUDY DESIGN: This retrospective cohort study conducted at a quaternary care center from January 2019 to December 2021 included singleton, term, nonanomalous pregnancies, with scheduled CD under spinal anesthesia. Hypotension was defined as a systolic blood pressure (SYS-BP) < 100 mm Hg (SYS-BP100) or a >20% drop from baseline blood pressure (SYS-BP20). Both the occurrence of hypotension and its magnitude and duration were studied; the latter through the development of a hypotension index. The 90th and 95th percentiles of the hypotension index for SYS-BP20 and SYS-BP100, respectively, were used to define sustained hypotension. The primary outcome was neonatal acidosis (umbilical artery pH ≤ 7.1 or base excess ≤ -12 mmol). Secondary outcomes were composites of neonatal (CNAO) and maternal (CMAO) adverse outcomes. Multivariable Poisson regression models with robust error variance analysis was used to estimate adjusted relative risks (aRRs) and 95% confidence intervals (CIs). RESULTS: Our study included 332 individuals who underwent scheduled CD; among them 330 (99.4%) received prophylactic vasopressors. The rate of neonatal acidosis was 4.2%. Sustained hypotension after spinal anesthesia, which occurred in 12.3% of the cohort, was associated with increased risk for neonatal acidosis (aRR 3.96, 95% CI 1.21-12.98), but was not associated with CNAO or CMAO. Time from spinal-to-delivery was not different in those with and without neonatal acidosis. CONCLUSION: Despite universal exposure to prophylactic vasopressors, sustained hypotension after spinal anesthesia was still associated with neonatal acidosis, but no other adverse perinatal outcomes. Our findings may provide additional support for the adoption of prophylactic vasopressors to reduce spinal hypotension and downstream effects on the neonate from intraoperative hemodynamic instability. KEY POINTS: · Despite prophylactic vasopressors during scheduled CD, neonatal acidosis occurred in 4% of subjects.. · Sustained hypotension after spinal anesthesia was associated with neonatal acidosis, but not adverse neonatal outcomes.. · Spinal-to-delivery time was not associated with neonatal acidosis in scheduled CD..

The Impact of Spontaneous versus Indicated Preterm Birth on Neonatal Outcomes among Extremely Premature Neonates.

OBJECTIVE: This study aimed to investigate whether neonatal morbidity differs in spontaneous compared with indicated preterm births in extremely premature neonates. STUDY DESIGN: This is a retrospective cohort study including births ≤28 weeks at a single institution from 2011 to 2020. Births were categorized as either medically indicated or spontaneous preterm deliveries. The primary outcome was inhospital mortality and serious morbidity in survivors. t-tests, Fisher's exact tests, chi-square tests, and logistic regression models were utilized as appropriate. p < 0.05 was significant. RESULTS: Two hundred and twenty-seven births were included, with two-thirds representing spontaneous births (65.6%, 149/227) and one-third categorized as medically indicated births (34.4%, 78/227). Inhospital mortality was more common in the spontaneous preterm birth group (p = 0.04), while inhospital morbidity did not significantly vary between the medically indicated and spontaneous birth groups (p = 0.32). There was no difference in inhospital morbidity or mortality by maternal race. In multivariate models of inhospital morbidity and mortality, gestational age was the only significant predictor of adverse outcomes. CONCLUSION: Despite inhospital mortality being more common in spontaneous preterm births, inhospital mortality and significant morbidity are best accounted for by gestational age alone. KEY POINTS: · Inhospital death is more common in spontaneous preterm births.. · Perinatal outcomes do not differ on the basis of racial/ethnic group.. · Gestational age is the best predictor of inhospital morbidity and mortality..

Severe Thrombocytopenia in a Pregnant Patient with Asymptomatic COVID-19 Infection: A Case Report.

Thrombocytopenia occurs in one-third of patients with coronavirus disease 2019 (COVID-19) infection and can indicate the severity of disease and may also increase the bleeding risk of performing invasive procedures. We present a pregnant patient with COVID-19 infection with the lowest platelet count described in the literature to date. The patient presented in labor at 38 weeks gestation with no other symptoms and was found to be positive on routine COVID-19 testing. The routine complete blood count upon admission was significant for a platelet count of 6 x 109/L which was rechecked and resulted in a platelet count of 8 x 109/L. The etiology of her thrombocytopenia was not clear prior to delivery as preeclampsia with severe features and lupus exacerbation were also possibilities that were considered. However, after delivery it became apparent that COVID-19 likely had a significant impact contributing to her severe thrombocytopenia. Her care was complicated by postpartum hemorrhage resulting in massive transfusion. This case highlights the importance of evaluating platelet count and coagulation status in COVID-19 patients, even if asymptomatic.

Cardiac remodeling in morbidly obese women and its association with adverse perinatal outcomes.

OBJECTIVES: To determine the association of cardiac remodeling in early pregnancy and adverse perinatal outcomes among women with BMI ≥ 40 kg/m2. STUDY DESIGN: We performed a retrospective cohort study including women with BMI ≥ 40 kg/m2 without known cardiac disease. Women who underwent screening transthoracic echocardiography prior to gestational age 24 weeks were included. Women were analyzed by group with normal or abnormal geometry, including concentric remodeling, eccentric hypertrophy, and concentric hypertrophy. Multivariable logistic regression was used to assess the association of abnormal geometry with perinatal outcomes. We had 80% power with alpha 0.05 to detect a 3.0-fold increase in the primary outcome among women with abnormal geometry. MAIN OUTCOME MEASURES: Our primary outcome was a composite of adverse perinatal outcomes including any 1 of the following: preterm birth (<37 weeks), low birth weight (<2500 g), or hypertensive disorders of pregnancy, including gestational hypertension, preeclampsia, and chronic hypertension with superimposed preeclampsia. RESULTS: Of 140 women, 53 (37.9%) had abnormal geometry. The average BMI was similar between those with normal and abnormal geometry (44.7 vs. 44.2 kg/m2, p = 0.53). The primary outcome occurred in 20.7% with normal geometry and 30.2% with abnormal geometry (p = 0.20). After adjustment for parity, chronic hypertension, and tobacco use, abnormal cardiac geometry was not associated with the composite primary outcome (adjusted OR 2.01 [95% CI 0.84-4.78]) but was associated with hypertensive disorders of pregnancy (adjusted OR 2.82 [95% CI 1.03-7.78]). CONCLUSIONS: Cardiac remodeling early in pregnancy is associated with hypertensive disorders of pregnancy.

Screening practices for identifying type 2 diabetes in adolescents.

OBJECTIVE: To characterize pediatrician and family physician (FP) screening practices for type 2 diabetes among adolescents and to examine the impact of the 2010 American Diabetes Association (ADA) guidelines, recommending use of Hemoglobin A1c (HbA1c). METHODS: We conducted a cross-sectional mail survey of a random sample of 1,400 U.S. pediatricians and FPs and we received 604 eligible responses. Our main outcome measure was the types of tests ordered by physicians, particularly HbA1c, when presented with a hypothetical scenario. RESULTS: The overall response rate was 52% (57% for pediatricians and 48% for FPs). Fasting glucose and HbA1c were the most commonly ordered tests. Overall, at least 58% of physicians ordered HbA1c; 35% ordered HbA1c in conjunction with fasting tests; and 22% ordered HbA1c alone or with nonfasting tests. Only 38% of providers were aware of the new ADA recommended HbA1c screening guidelines. However, a majority (67%) said they would change their screening practices. In the context of the guidelines, 84% of physicians would now order HbA1c. Furthermore, there was a large increase in the proportion of physicians who would shift to using HbA1c only or with other nonfasting tests. CONCLUSIONS: When screening adolescents for type 2 diabetes, providers are more likely to order HbA1c and order fewer fasting tests in response to the new ADA guidelines. HbA1c has lower sensitivity and higher costs than other testing modalities in children, therefore increasing uptake of this test (HbA1c) in children may have implications for both detection rates and healthcare costs.

Cost-effectiveness of screening strategies for identifying pediatric diabetes mellitus and dysglycemia.

OBJECTIVE: To conduct a cost-effectiveness analysis of screening strategies for identifying children with type 2 diabetes mellitus and dysglycemia (prediabetes/diabetes). DESIGN: Cost simulation study. SETTING: A one-time US screening program. STUDY PARTICIPANTS: A total of 2.5 million children aged 10 to 17 years. INTERVENTION: Screening strategies for identifying diabetes and dysglycemia. MAIN OUTCOME MEASURES: Effectiveness (proportion of cases identified), total costs (direct and indirect), and efficiency (cost per case identified) of each screening strategy based on test performance data from a pediatric cohort and cost data from Medicare and the US Bureau of Labor Statistics. RESULTS: In the base-case model, 500 and 400 000 US adolescents had diabetes and dysglycemia, respectively. For diabetes, the cost per case was extremely high ($312 000-$831 000 per case identified) because of the low prevalence of disease. For dysglycemia, the cost per case was in a more reasonable range. For dysglycemia, preferred strategies were the 2-hour oral glucose tolerance test (100% effectiveness; $390 per case), 1-hour glucose challenge test (63% effectiveness; $571), random glucose test (55% effectiveness; $498), or a hemoglobin A1c threshold of 5.5% (45% effectiveness; $763). Hemoglobin A1c thresholds of 5.7% and 6.5% were the least effective and least efficient (ranges, 7%-32% and $938-$3370) of all strategies evaluated. Sensitivity analyses for diabetes revealed that disease prevalence was a major driver of cost-effectiveness. Sensitivity analyses for dysglycemia did not lead to appreciable changes in overall rankings among tests. CONCLUSIONS: For diabetes, the cost per case is extremely high because of the low prevalence of the disease in the pediatric population. Screening for diabetes could become more cost-effective if dysglycemia is explicitly considered as a screening outcome.