B-type natriuretic peptide and echocardiography reflect volume changes during pregnancy.

OBJECTIVE: To evaluate B-type natriuretic peptide (BNP) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) and cardiac structure and function in normal women through pregnancy and the postpartum. METHODS: In this prospective observational study, we obtained serial transthoracic echocardiograms, BNP, and NT-proBNP at seven intervals from 6 weeks' gestation through 12 months postpartum. Women with hypertension or cardiac disease were excluded. Using 6-12 months postpartum as reference for non-pregnant levels, echocardiogram measurements and BNP/NT-proBNP were compared over time using linear mixed models with Tukey-Kramer adjustment for multiple comparisons. RESULTS: Of 116 patients, data was available for 78-114 healthy pregnant or postpartum women within each time interval, and 102 patients provided data for ≥4 intervals. Compared to 6-12 months postpartum, BNP and NT-proBNP remained stable through pregnancy and delivery, increased within 48 h postpartum (P<0.0001), then returned to baseline. Left ventricular volume increased within 48 h postpartum (P=0.021) while left atrial volume increased at 18-24 weeks (P=0.0002), 30-36 weeks (P<0.0001) and within 48 h postpartum (P=0.002). The transmitral early/late diastolic velocity (E/A) ratio, transmitral early/peak mitral annulus diastolic velocity (E/E') ratio, isovolumic relaxation times, and mitral valve deceleration times were similar within 48 h and 6-12 months postpartum. CONCLUSION: In normal women, BNP/NT-proBNP, left atrial, and left ventricular volumes increase within 48 h postpartum without indications of altered diastolic function.

Restricted episiotomy use and maternal and neonatal injuries: a retrospective cohort study.

PURPOSE: There is relatively little information on episiotomies in the context of restricted episiotomy use. This study sought to examine maternal and neonatal injuries with restricted episiotomy use. METHODS: We performed a retrospective database analysis of vaginal deliveries at a tertiary care maternity hospital from June 2010 to June 2015. Maternal injuries (third- or fourth-degree lacerations) and neonatal injuries (birth trauma) were identified through the International Classification of Diseases, Ninth Revision, codes. Vaginal deliveries were classified as spontaneous, vacuum-assisted, or forceps-assisted. The associations between episiotomy and maternal and neonatal injuries were examined with stratification by parity, type of vaginal delivery, and type of episiotomy (midline or mediolateral). Adjusted-odds' ratios were calculated for maternal and neonatal injuries using a multiple logistic regression model to adjust for potential confounders. RESULTS: 22,800 deliveries occurred during the study interval involving 23,016 neonates. The episiotomy rate was 6.7 % overall and 22.9 % in operative vaginal deliveries. Episiotomies, both midline and mediolateral, were associated with increased risks of maternal and neonatal injuries regardless of parity (p < 0.0001). Upon stratification by the type of delivery, the association with maternal injury remained only for spontaneous vaginal deliveries (p < 0.0001). Adjusted-odds' ratios demonstrated a continued association between episiotomy and maternal [aOR 1.67 (1.39-2.05)] and neonatal injuries [aOR 1.43 (1.17-1.73)]. CONCLUSION: Episiotomy continues to be associated with increased third- and fourth-degree lacerations with restricted use, particularly in spontaneous vaginal deliveries.

Can we really diagnose diabetes during pregnancy?

OBJECTIVE: To identify the accuracy of diagnosing postpartum diabetes and glucose intolerance using antepartum glycosylated hemoglobin (HbA1c) and fasting glucose values. STUDY DESIGN: A retrospective Hawaiian cohort of women with gestational diabetes during 2004-2011 were evaluated. Antepartum HbA1c and postpartum 75-g glucose tolerance tests were obtained. RESULTS: An antepartum HbA1c value of ≥6.5% had a 45.7% sensitivity, a 96% specificity and a 40% positive predictive value (PPV) for predicting postpartum diabetes. An antepartum HbA1c value of ≥6.5% had a 6.6% sensitivity, a 94.2% specificity and a 27% PPV for predicting postpartum impaired glucose tolerance. An antepartum HbA1c value of ≥6.5% had a 10.3% sensitivity, a 95.7% specificity and a 33.3% PPV for predicting postpartum impaired fasting glucoses. CONCLUSION: We could not demonstrate a clinically useful PPV for diagnosing postpartum diabetes or glucose intolerance using an antepartum elevated HbA1c value of ≥6.5% or a fasting glucose level of ≥90 mg/dL.

Hemodynamic effects of nifedipine tocolysis.

AIM: To describe the effects of nifedipine tocolysis on blood pressure and heart rate in non-hypertensive women. METHODS: This was a retrospective study from 2001 to 2011 to compare blood pressures and heart rates among non-hypertensive women on nifedipine tocolysis up to 8 h after nifedipine initiation. Measurements at 20-60 and 61-120 min were compared to assess the differential effects of dosing on hemodynamics and reflected the effects of the initial and complete loading doses, respectively. Charts were reviewed for hypotension-related emergent delivery. RESULTS: One hundred and thirty-eight patients were included. Over the 8-h study interval, mean systolic blood pressure (P < 0.001) and mean diastolic blood pressure (P < 0.001) decreased by 5 mmHg and heart rate increased by 4 b.p.m. (P < 0.001). Systolic and diastolic blood pressures were unchanged from baseline up to 120 min at all doses. Heart rate increased at both 20-60 and 61-120 min when all doses were considered (P < 0.001), but differential dosing effects were not observed. Rates of tachycardia increased (P < 0.001), but rates of hypotension were unchanged. No hypotension-related emergent deliveries occurred. CONCLUSION: Nifedipine tocolysis was associated with hemodynamic changes in non-hypertensive women. Tachycardia was increased but hypotension was unaffected, supporting the general safety of nifedipine in this setting.

Managing Diabetes in Pregnancy Using Cell Phone/Internet Technology.

In Brief For pregnant women with diabetes, using cell phone/Internet technology to track and report self-monitoring of blood glucose results improves compliance and satisfaction compared to using the more traditional methods of log books, telephone calls, and voicemail messages.

Assessment of vascular endothelial growth factor, basic fibroblast growth factor, and transforming growth factor levels in amniotic fluid.

OBJECTIVE: To measure amniotic fluid levels of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), and transforming growth factor (TGF)-beta2 and to characterize their levels with respect to advancing gestational age and pregnancy-related complications. STUDY DESIGN: Amniotic fluid was collected from a total of 37 patients, 2 of whom had twin pregnancies. Twenty-seven specimens were collected in the second trimester and 10 specimens were collected in the third trimester. VEGF, bFGF and TGF-beta2 were isolated from centrifuged amniotic fluid and quantified using commercially available ELISA kits. Concentrations of growth factors were expressed in pg/mL. RESULTS: The growth factors under investigation were present in most but not all amniotic fluid specimens throughout pregnancy. The levels of VEGF, bFGF and TGF-beta2 were inconsistent and did not show a statistically significant association with gestational age, number of fetuses, or the presence of hypertension and/or diabetes. One significant finding emerged from the data: smokers had significantly higher amniotic fluid levels of VEGF compared to nonsmokers (p = 0.03). CONCLUSION: VEGF, bFGF and TGF-beta2 are detectable in second and third trimester amniotic fluid. Smoking appears to correlate with increased amniotic fluid VEGF during pregnancy. VEGF may represent a molecular marker of hypoxia and is an interesting focus for future investigation.

Moyamoya disease in pregnancy: a case series and review of management options.

BACKGROUND: Pregnancy has a potentially deleterious affect on moyamoya disease (MMD), a cerebrovascular condition characterized by spontaneous occlusion of the distal internal carotid arteries resulting in the neoangiogenesis of fragile collateral blood vessels. The disease renders patients susceptible to both hemorrhagic and ischemic stroke. METHODS: A 16-year (1995-2010) chart review was performed at the Kapi'olani Medical Center for Women and Children and the Queen's Medical Center, the two largest birthing centers in Hawai'i. RESULTS: The authors report on three women with MMD who had the revascularization surgery prior to their first pregnancy and experienced successful pregnancy outcomes without the MMD symptoms. Two of these were managed with antiplatelet agents, one with calcium channel blockers, and two with magnesium sulphate in the perioperative period. CONCLUSION: The authors' cases demonstrate different medical therapies, which may be of benefit for MMD with and without revascularization surgery during pregnancy.

Complications of operative vaginal delivery and provider volume and experience.

OBJECTIVE: To evaluate associations between operative vaginal delivery complications and provider experience (operative vaginal delivery volume and time since residency). METHODS: We included all operative vaginal deliveries between 2008 and 2014 at a tertiary care teaching hospital, stratified into forceps-assisted and vacuum-assisted deliveries. Complications included severe perineal lacerations (3rd and 4th degree) and neonatal injuries (subgaleal/subdural/cerebral hemorrhage, facial nerve injury, and scalp injury), which were identified by International Classification Diagnosis-9 codes. Providers were categorized by operative vaginal delivery volume (mean annual forceps- or vacuum-assisted deliveries over the study interval) and time since residency. Regression analyses were used to compare complication rates by provider volume and time since residency, adjusting for potential confounders, using 0-1 deliveries per year and <5 years since residency as reference groups. RESULTS: Nine hundred and thirty-four forceps and 1074 vacuums occurred. For forceps-assisted deliveries, severe perineal injury was decreased among providers with >10 forceps per year (aOR 0.50 [95%CI 0.30-0.81]) and at 15-19 years (aOR 0.45 [95% CI 0.22-0.94], and ≥25 years (aOR 0.45 [0.27-0.73]) since residency. There were no associations with neonatal injuries. Among vacuum-assisted deliveries, severe perineal injury decreased at ≥25 years since residency (aOR 0.35 [95%CI 0.17-0.74], with no association with provider volume. Neonatal injury decreased at 5-9 years (aOR 0.53 [95%CI 0.30-0.93]), and 15-19 years since residency (aOR 0.53 [95%CI 0.29-0.97]), due to differences in scalp injuries. Neonatal injuries other than scalp injury were rare. CONCLUSION: Severe perineal lacerations decreased with increasing operative vaginal delivery experience, primarily among forceps-assisted vaginal delivery. Providers >5 years since residency may have lower scalp injury with vacuums, but this cohort was largely underpowered for neonatal injury.

Genetic risk factors associated with gestational diabetes in a multi-ethnic population.

AIMS: Genome-wide association studies have shown an increased risk of type-2-diabetes (T2DM) in patients who carry single nucleotide polymorphisms in several genes. We investigated whether the same gene loci confer a risk for gestational diabetes mellitus (GDM) in women from Hawaii, and in particular, Pacific Islander and Filipino populations. METHODS: Blood was collected from 291 women with GDM and 734 matched non-diabetic controls (Pacific Islanders: 71 GDM, 197 non-diabetic controls; Filipinos: 162 GDM, 395 controls; Japanese: 58 GDM, 142 controls). Maternal DNA was used to genotype and show allele frequencies of 25 different SNPs mapped to 18 different loci. RESULTS: After adjusting for age, BMI, parity and gravidity by multivariable logistic regression, several SNPs showed significant associations with GDM and were ethnicity specific. In particular, SNPs rs1113132 (EXT2), rs1111875 (HHEX), rs2237892 (KCNQ1), rs2237895 (KCNQ1), rs10830963 (MTNR1B) and rs13266634 (SLC30A8) showed significant associations with GDM in Filipinos. For Japanese, SNPs rs4402960 (IGFBP2) and rs2237892 (KCNQ1) were significantly associated with GDM. For Pacific Islanders, SNPs rs10830963 (MTNR1B) and rs13266634 (SLC30A8) showed significant associations with GDM. Individually, none of the SNPs showed a consistent association with GDM across all three investigated ethnicities. CONCLUSION: Several SNPs associated with T2DM are found to confer increased risk for GDM in a multiethnic cohort in Hawaii.

Obstetric anal sphincter injury repair workshop for residents.

OBJECTIVE: Obstetric anal sphincter injury (ASI) is associated with significant morbidity We conducted an ASI workshop for 20 obstetrics and gynecology residents and assessed its impact. Our goal was to determine and enhance residents' knowledge using a multimedia presentation, hands-on simulator and tests. We comment on trends regarding residents' knowledge bases and their retention of the material. STUDY DESIGN: The workshop consisted of a pretest, lecture with slideshow, DVD, and 20 simulator stations. The porcine tongue simulator represented the human perineum, bungee cord the anal sphincter and a laceration created in each tongue an obstetrical ASI. Faculty members supervised the residents' suture repairs. We analyzed responses from identical immediate posttests and delayed posttests. RESULTS: Out of a possible 18 points, the average scores were: pretest 9.1 (SD 2.32), posttest 17 (SD 1.34; P < .001), and delayed posttest 15.1 (SD 1.52; P < .001). On a 10 cm visual analog scale (VAS) evaluating the helpfulness of this exercise, the average respondent marked 9.0 (SD 0.95). On a VAS evaluating the comfort level in repairing ASI, the average pre-simulator score was 3.9 (SD 3.13) and the average post-simulator score 5.2 (SD 2.96; P < .001). CONCLUSION: Relevant structured workshops with simulators for ASI repair could help improve residents' background knowledge and skills in repairing such injuries.

Associations Between Maternal Obesity and Race, with Obstetric Anal Sphincter Injury: A Retrospective Cohort Study.

This retrospective cohort study examined associations between maternal body mass index (BMI), race, and obstetric anal sphincter injury (OASI) (3rd/4th degree perineal lacerations). Obstetric anal sphincter injury may lead to significant maternal morbidity, and a more thorough understanding of risk factors for this complication may guide providers in patient counseling and procedures such as episiotomy or operative vaginal delivery. Vaginal deliveries performed at Kapi'olani Medical Center for Women and Children from 2008-2015 were included. Maternal body mass index at delivery was used and OASIs identified through International Classification of Diseases codes. Demographic/clinical variables were summarized through descriptive statistics. Adjusted odds ratios were calculated using multiple logistic regression. Of the 25,594 deliveries included, 1,198 (4.7%) involved an OASI. OASI prevalence differed by BMI (P < .0001). The prevalence was highest in women with BMI < 30 kg/m2 (5.3%) and then decreased as BMI increased with women with BMI ≥ 50 demonstrating the lowest prevalence (1.7%). Compared to women with BMI < 30 kg/m2, women with BMI > 50 kg/m2 had a lower odds of OASI (OR 0.31 [95%CI 0.11 - 0.83]), which persisted after adjustment (aOR 0.28 [95%CI 0.08-0.96]). OASI also differed by race (P < .0001), with Native Hawaiian and other Pacific Islanders (NHOPI) demonstrating the lowest prevalence (3.0%) and Asians the highest (5.6%). After adjustment, compared to White women, NHOPI women had lower OASI prevalence that met the borderline of statistical significance (aOR 0.79 [95%CI 0.62-1.01]), while Asian women continued to demonstrate increased prevalence (aOR 1.50 [95% CI 1.22-1.85]). We conclude that obese women, including those with BMI ≥ 50 kg/m2, have lower OASI prevalence. Race is also a significant factor, with Asians almost double the prevalence of NHOPIs. These findings contribute to evidence-based, individualized patient counseling on OASI.

Successful quintuplet pregnancy of monochorionic male quadruplets and single female after double embryo transfer: case report and review of the literature.

OBJECTIVE: To report a rare case of quintuplets with monochorionic male quadruplets and a single female after two-blastocyst transfer. DESIGN: Case report. SETTING: University teaching hospital. PATIENT(S): A 37-year-old gravida 1, para 1, presenting after two-embryo IVF with monochorionic male quadruplets and a single female. INTERVENTION(S): Ultrasound examinations and cesarean delivery. MAIN OUTCOME MEASURE(S): Successful delivery of five live-born infants at 28 weeks and 6 days of gestation for preterm labor. RESULT(S): The patient was diagnosed with quintuplets consisting of monochorionic male quadruplets and a single female after the placement of two embryos in blastocyst stage. She was followed closely with ultrasound examinations and hospitalized at 23 weeks' gestation. Cesarean delivery was performed at 28 weeks and 6 days of gestation, with eventual discharge of all infants in healthy condition. CONCLUSION(S): This case represents successful assisted reproductive technology quintuplets with monochorionic quadruplets and a co-sibling. Higher-order monozygotic pregnancies with monochorionic quadruplets are exceedingly rare and a potential complication of IVF.

Management of group B Streptococcus in pregnant women with penicillin allergy.

OBJECTIVE: To determine whether group B Streptococcus (GBS)-colonized pregnant women who report a history of penicillin allergy can safely undergo diagnostic evaluation to rule out or confirm the potential for an IgE-mediated (allergic) reaction to penicillin. STUDY DESIGN: Over 18 months, all pregnant women with GBS-positive vaginal/rectal cultures and a history of penicillin allergy were referred to the Department of Allergy and Immunology for a history and possible skin testing. Patients who had experienced anaphylaxis were advised to continue avoiding penicillin and were not skin tested. Women without such a history underwent immediate hypersensitivity (percutaneous and intradermal) testing using 2 penicillin reagents with controls. If skin testing was negative, intrapartum antimicrobial prophylaxis with intravenous penicillin was administered. RESULTS: Of 28 patients with both GBS colonization and "penicillin allergy," 25 (89%) had negative skin testing to penicillin and received intrapartum penicillin for GBS prophylaxis without adverse reactions. Skin testing was positive in 2 patients, and intrapartum penicillin was not administered. Penicillin skin testing was not performed on 1 patient due to a history of anaphylaxis from penicillin. CONCLUSION: These results indicate that most pregnant women reporting penicillin allergy undergo negative skin tests and are able to safely receive intrapartum penicillin GBS prophylaxis.

Total antioxidant capacity and reactive oxygen species in amniotic fluid.

OBJECTIVE: To identify the presence and/or absence of reactive oxygen species and total antioxidant capacity in amniotic fluid and to determine changes in the levels of reactive oxygen species and total antioxidant capacity with advancing gestational age of pregnancy and fetal or neonatal weights. METHODS: Amniotic fluid was collected from a total of 26 nonsmoking patients. Nine specimens were collected in the third trimester of pregnancy, and 17 specimens were collected in the second trimester. Amniotic fluid reactive oxygen species and total antioxidant capacity levels were determined by chemiluminescence and spectrophotometric assays, respectively. Reactive oxygen species and total antioxidant capacity levels were established and then compared for advancing gestational ages and estimated fetal weights or neonatal weights. RESULTS: Reactive oxygen species levels were present in some but not all specimens, and total antioxidant capacity was present in all specimens. Total antioxidant capacity but not reactive oxygen species levels increased from the second to the third trimester (347.0 mmol/L versus 776.0 mmol/L, P <.001). There was a positive Spearman correlation between total antioxidant capacity and gestational age (r = 0.72, 95% confidence interval 0.43, 1.0, P <.001) and between total antioxidant capacity and estimated fetal weights or neonatal birth weights (r = 0.70, 95% confidence interval 0.40, 1.0, P <.001). There was no correlation between reactive oxygen species and advancing gestational age or weight. CONCLUSION: Total antioxidant capacity levels are present in amniotic fluid at least as early as the second trimester and increase with advancing gestational age and fetal or neonatal weights. Reactive oxygen species levels are not necessarily present in amniotic fluid, and they do not appear to be influenced by gestational age or estimated fetal or neonatal weights.