Mark C. Chames

Pregnancy-onset habitual snoring, gestational hypertension, and preeclampsia: prospective cohort study

OBJECTIVE This study aimed to prospectively examine the impact of chronic vs pregnancy-onset habitual snoring on gestational hypertension, preeclampsia, and gestational diabetes. STUDY DESIGN Third-trimester pregnant women were recruited from a large, tertiary medical center from March 2007 through December 2010 and screened for the presence and duration of habitual snoring, as a known marker for sleep-disordered breathing. Clinical diagnoses of gestational hypertension, preeclampsia, and gestational diabetes were obtained. RESULTS Of 1719 pregnant women, 34% reported snoring, with 25% reporting pregnancy-onset snoring. After adjusting for confounders, pregnancy-onset, but not chronic, snoring was independently associated with gestational hypertension (odds ratio, 2.36; 95% confidence interval, 1.48-3.77; P < .001) and preeclampsia (odds ratio, 1.59; 95% confidence interval, 1.06-2.37; P = .024) but not gestational diabetes. CONCLUSION New-onset snoring during pregnancy is a strong risk factor for gestational hypertension and preeclampsia. In view of the significant morbidity and health care costs associated with hypertensive diseases of pregnancy, simple screening of pregnant women may have clinical utility.

Snoring during pregnancy and delivery outcomes: a cohort study.

STUDY OBJECTIVE This cohort study examined the impact of maternal snoring on key delivery outcomes such as mode of delivery, infant birth centile, and small-for-gestational age. DESIGN Cohort study. SETTING A large tertiary medical center. PATIENTS OR PARTICIPANTS Pregnant women in their third trimester were recruited between March 2007 and December 2010. MEASUREMENTS AND RESULTS Women were screened for habitual snoring, as a known marker for sleep disordered breathing. Outcome data were obtained from medical records following delivery and birth centiles were calculated. Of 1,673 women, a total of 35% reported habitual snoring (26% with pregnancy-onset snoring and 9% with chronic snoring). After adjusting for confounders, chronic snoring was associated with small-forgestational age (OR 1.65, 95%CI 1.02-2.66, P = 0.041) and elective cesarean delivery (OR 2.25, 95%CI 1.22-4.18, P = 0.008). Pregnancy-onset snoring was associated with emergency cesarean delivery (OR 1.68, 95%CI 1.22-2.30, P = 0.001). CONCLUSION Maternal snoring during pregnancy is a risk factor for adverse delivery outcomes including cesarean delivery and small-for-gestational age. Screening pregnant women for symptoms of SDB may provide an early opportunity to identify women at risk of poor delivery outcomes. CLINICAL TRIALS REGISTRATION IDENTIFIER: NCT01030003.

Myomectomy during cesarean delivery.

The optimal management of leiomyomas during cesarean delivery is unclear.

Hypertension, snoring, and obstructive sleep apnoea during pregnancy: A cohort study

To assess the frequency of obstructive sleep apnoea among women with and without hypertensive disorders of pregnancy.

Validation of Watch-PAT-200 against polysomnography during pregnancy.

STUDY OBJECTIVES To determine the relationships between key variables obtained from ambulatory polysomnography (PSG) and the wrist-worn Watch-PAT 200 device in pregnant women. METHODS In this prospective cohort study, women in their third trimester of pregnancy underwent full overnight home PSG using the 22-channel MediPalm system and the Watch-PAT 200 device. PSGs were scored by a blinded, experienced technologist using AASM 2007 criteria; the Watch-PAT was scored automatically by the manufacturers proprietary software. RESULTS A total of 31 pregnant women were studied. Mean age was 30.2 ± 7.1 years; mean gestational age was 33.4 ± 3.0 weeks; mean BMI was 31.9 ± 8.1 kg/m(2); 39% of women were nulliparous. Key variables generated by PSG and Watch-PAT correlated well over a wide range, including the apnea-hypopnea index (AHI, r = 0.76, p < 0.001); respiratory disturbance index (RDI, r = 0.68, p < 0.001), mean oxygen saturation (r = 0.94, p < 0.001), and minimum oxygen saturation (r = 0.88, p < 0.001). The area under the curve for AHI ≥ 5 and RDI ≥ 10 were 0.96 and 0.94, respectively. Association between stage 3 sleep on PSG and deep sleep on Watch-PAT was poor. Watch-PAT tended to overscore RDI, particularly as severity increased. CONCLUSIONS Among pregnant women, Watch-PAT demonstrates excellent sensitivity and specificity for identification of obstructive sleep apnea, defined as AHI ≥ 5 on full PSG. Watch-PAT may overestimate RDI somewhat, especially at high RDI values.

Tissue-specific cytokine release from human extra-placental membranes stimulated by lipopolysaccharide in a two-compartment tissue culture system

BackgroundThe extra-placental gestational membranes secrete cytokines in response to bacteria and other infectious agents, with potentially adverse consequences for pregnancy. The present study used lipopolysaccharide (LPS) as a prototype endotoxin to investigate the pattern of stimulated cytokine release from the amniotic and choriodecidual sides of full-thickness human gestational membranes in a two-compartment tissue culture system.MethodsGestational membranes were collected from healthy non-laboring caesarean deliveries at term. Full-thickness membranes from each placenta were cut into pieces, mounted on Transwell frames, and placed in culture wells to create a two-compartment culture with the gestational membranes serving as the barrier between compartments. The LPS (100 ng/ml) was added to the amniotic, choriodecidual or both chambers of the culture, and cytokines were assayed in the medium of the amniotic and choriodecidual chambers after 8 h of LPS exposure. Cytokine concentrations were analyzed by two-way analysis of variance for effects of treatment and side specificity of cytokine release from the membranes.ResultsLPS exposure on the choriodecidual side of the membranes significantly increased TNF-alpha, IL-6, IL-10 and IL-8 in the choriodecidual compartment, whereas TNF-alpha was the only cytokine observed to increase in the amniotic compartment. When LPS treatment was to the amniotic side of the membranes, there were significant increases in TNF-alpha and IL-6 in the amniotic compartment as well as increased concentrations of TNF-alpha, IL-6 and IL-8 in the choriodecidual compartment; however, there were no statistically significant differences for IL-10 in either compartment. No statistically significant differences were observed for IL-1beta, TGF-beta or IL-4 concentrations in response to LPS, regardless of the exposure modality.ConclusionThe amnion and choriodecidua exhibited distinct patterns of response to LPS with evidence of inflammatory signaling across the layers of the gestational membranes. These results suggest a complicated network of signaling within the gestational membranes, in which cytokine- and tissue-specific responses to inflammatory stimulation may have important implications for maintaining pregnancy in the challenge of microbial invasion of the uterine compartment.

National survey of obstetrician attitudes about timing the subsequent pregnancy after perinatal death

OBJECTIVE After stillbirth or early infant death, parents often query when they can try for another pregnancy. We conducted a national survey of US obstetricians to assess attitudes about optimal timing of next pregnancy and advice given to parents. STUDY DESIGN The study was an anonymous mail survey of 1500 randomly selected US obstetricians asking about physician experiences with perinatal death. RESULTS In all, 804 of 1500 obstetricians completed the survey for a 54% usable response rate. Two-thirds of respondents endorsed a waiting time <6 months for parents bereaved by stillbirth who desired another pregnancy. CONCLUSION Physicians in this national survey supported very short interpregnancy intervals for parents bereaved by perinatal death. Responses may reflect efforts to support parents emotionally while recognizing individuals vary in coping and clinical circumstances. However, this is a provocative finding since short intervals may confer greater fetal risks for poor outcome.

Identifying post-partum diabetes after gestational diabetes mellitus: the right test

84 www.thelancet.com/diabetes-endocrinology Vol 1 October 2013 calcium-stimulated venous catheterisation should be done. At the moment, the new radiotracer technique is probably best reserved for those cases in which conventional localisation techniques have not worked. In time, PET isotopes might become available that are more sensitive and can reduce scan times (although whether this would work well for the pancreas is unknown). Endocrinologists should nevertheless regard the nuclear technique as off ering great potential benefi t to our patients in the future.

Tissue-Specific Induction of COX-2 and Prostaglandins in Lipopolysaccharide-Stimulated Extraplacental Human Gestational Membranes in a 2-Chamber Transwell Culture System

The current study investigates tissue-specific prostaglandin secretion and cyclooxygenase 2 (COX-2) induction in full-thickness human gestational membranes. Gestational membranes were collected from healthy, nonlaboring cesarean deliveries at 37 to 39 weeks gestation and cultured in 2-chamber Transwell devices. Lipopolysaccharide exposure (100 ng/mL for 8 hours) elevated prostaglandin E2 and F2α concentrations in the amniotic chamber medium regardless of whether exposure was to the amniotic, decidual, or both sides of the membranes. However, prostaglandin E2 and F2 α concentrations in the decidual chamber medium were elevated compared with controls only if the decidual side was exposed directly to lipopolysaccharide. Whereas prostaglandin F2α concentrations increased to similar extents in the amniotic and decidual chambers regardless of lipopolysaccharide exposure modality, prostaglandin E2 concentrations were 22-fold higher on the amniotic side than the decidual side after lipopolysaccharide stimulation of the amnion. These findings demonstrate the propagation of prostaglandins, prostaglandin precursors, or other factors in the direction of the decidua to the amnion, but the reverse situation was not evident. Immunostaining for COX-2 was related to the side of lipopolysaccharide exposure, that is, exposure to the amnion caused immunostaining in cells of the collagen layers of the amnion and chorion, whereas exposure to the decidual side caused staining in decidual cells. These findings suggest that the inflammatory effect of lipopolysaccharide on COX-2 induction occurs within a localized area of exposure and that prostaglandins or their precursors move across the tissues of the gestational membranes by currently undefined transport mechanisms.

Giant Pulmonary Sequestration: The Rare Case Requiring the EXIT Procedure with Resection and ECMO

Although most prenatally diagnosed pulmonary sequestrations (PS) are asymptomatic, large lesions are associated with pleural effusions and pulmonary hypoplasia. We present the first reported case of a prenatally diagnosed giant extralobar pulmonary sequestration that required the ex utero intrapartum treatment (EXIT) procedure with resection and extracorporeal membrane oxygenation (ECMO). We discuss the compelling rationale for performing EXIT-resection-ECMO in the setting of a large thoracic mass and anticipated severe respiratory failure at birth.