Publications by authors named "David S Mckenna"

Article Synopsis
  • - The study aimed to see if treating mild chronic hypertension (CHTN) during pregnancy would lead to fewer unplanned healthcare visits after childbirth.
  • - An analysis of 2,293 pregnant patients showed that overall unplanned healthcare utilization rates were similar between the treatment and control groups, though emergency visits were notably lower in the treated group.
  • - Factors like higher BMI and cesarean deliveries were found to increase the likelihood of needing unplanned postpartum care, even though treating mild CHTN showed some specific benefits.
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Objective: To compare differences in postpartum blood pressure (BP) control (BP below 140/90 mm Hg) for participants with hypertension randomized to receive antihypertensive treatment compared with no treatment during pregnancy.

Methods: This study was a planned secondary analysis of a multicenter, open-label, randomized controlled trial (The CHAP [Chronic Hypertension and Pregnancy] trial). Pregnant participants with mild chronic hypertension (BP below 160/105 mm Hg) were randomized into two groups: active (antihypertensive treatment) or control (no treatment unless severe hypertension, BP 160/105 mm Hg or higher).

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Objective: Determine if knowledge of a third-trimester ultrasound diagnosis of large for gestational age (LGA) independently increases the risk of cesarean delivery (CD).

Study Design: Historical cohort comparing CD rate among patients diagnosed with an LGA fetus on a clinically indicated ultrasound from January 2017 to July 2021 with those without an LGA diagnosis at 34 weeks or later. LGA was defined as an ultrasound-estimated fetal weight greater than or equal to the 90th percentile for the gestational age.

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Objective: To investigate the optimal gestational age to deliver pregnant people with chronic hypertension to improve perinatal outcomes.

Methods: We conducted a planned secondary analysis of a randomized controlled trial of chronic hypertension treatment to different blood pressure goals. Participants with term, singleton gestations were included.

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Objective: To evaluate maternal and neonatal outcomes by type of antihypertensive used in participants of the CHAP (Chronic Hypertension in Pregnancy) trial.

Methods: We conducted a planned secondary analysis of CHAP, an open-label, multicenter, randomized trial of antihypertensive treatment compared with standard care (no treatment unless severe hypertension developed) in pregnant patients with mild chronic hypertension (blood pressure 140-159/90-104 mm Hg before 20 weeks of gestation) and singleton pregnancies. We performed three comparisons based on medications prescribed at enrollment: labetalol compared with standard care, nifedipine compared with standard care, and labetalol compared with nifedipine.

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Objective: To estimate the association between mean arterial pressure during pregnancy and neonatal outcomes in participants with chronic hypertension using data from the CHAP (Chronic Hypertension and Pregnancy) trial.

Methods: A secondary analysis of the CHAP trial, an open-label, multicenter randomized trial of antihypertensive treatment in pregnancy, was conducted. The CHAP trial enrolled participants with mild chronic hypertension (blood pressure [BP] 140-159/90-104 mm Hg) and singleton pregnancies less than 23 weeks of gestation, randomizing them to active treatment (maintained on antihypertensive therapy with a goal BP below 140/90 mm Hg) or standard treatment (control; antihypertensives withheld unless BP reached 160 mm Hg systolic BP or higher or 105 mm Hg diastolic BP or higher).

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Article Synopsis
  • * Researchers will perform an individual participant data meta-analysis by reviewing multiple medical databases for trials comparing high FiO (0.60-1.00) to regular FiO (0.21-0.40) and will analyze SSI rates and mortality following surgery.
  • * The analysis will use statistical models to handle data clustering and assess bias, with planned subgroup analyses, including factors like mechanical ventilation use, to enhance the understanding of outcomes.
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Purpose: The hypothesis was fetal sex determination by ultrasound at 11-14 weeks' gestation has sufficient accuracy to be clinically relevant.

Methods: Fetal sex assessment by transabdominal ultrasound was performed in 567 fetuses at 11-14 weeks' gestation (CRL: 45-84 mm). A mid-sagittal view of the genital region was obtained.

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Objective: Fetal electrocardiogram (ECG) ST changes are associated with fetal cardiac hypoxia. Our objective was to evaluate ST changes by maternal diabetic status and stage of labor.

Methods: This was a secondary analysis of a multicentered randomized-controlled trial in which laboring patients with singleton gestations underwent fetal ECG scalp electrode placement and were randomly assigned to masked or unmasked ST-segment readings.

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Objective: This study aimed to evaluate whether intrapartum fetal electrocardiogram (ECG) tracings with ST-elevation or depression occur more frequently in each stage of labor in small-for-gestational age (SGA) or large-for-gestational age (LGA), as compared with appropriate-for-gestational age (AGA) fetuses.

Study Design: We conducted a secondary analysis of a large, multicenter trial in which laboring patients underwent fetal ECG waveform-analysis. We excluded participants with diabetes mellitus and major fetal anomalies.

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Objective: To evaluate intrapartum resuscitation interventions and improvement in category II fetal heart rate (FHR) tracings.

Methods: This secondary analysis of a randomized trial of intrapartum fetal electrocardiographic ST-segment analysis included all participants with category II FHR tracings undergoing intrauterine resuscitation: maternal oxygen, intravenous fluid bolus, amnioinfusion, or tocolytic administration. Fetal heart rate pattern-recognition software was used to confirm category II FHR tracings 30 minutes before intervention and to analyze the subsequent 60 minutes.

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Proteoglycans have a core polypeptide connected to glycosaminoglycans (GAGs) via a common tetrasaccharide linker region. Defects in enzymes that synthesize the linker result in a group of autosomal recessive conditions called "linkeropathies". Disease manifests with skeletal and connective tissue features, including short stature, hyperextensible skin, and joint hypermobility.

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Objective: To compare fetal heart rate (FHR) patterns during the last hour of labor between small-for-gestational-age (SGA; birth weight less than the 10th percentile for gestational age) and appropriate-for-gestational-age (AGA; birth weight at the 10-90th percentile) neonates at 36 weeks of gestation or greater. We also compared the rate of cesarean delivery and composite neonatal morbidity among SGA and AGA newborns.

Methods: This is a secondary analysis of a randomized trial of intrapartum fetal electrocardiographic ST-segment analysis.

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Objective: To promote use of progestogen therapy to reduce premature births in Ohio by 10%.

Methods: The Ohio Perinatal Quality Collaborative initiated a quality improvement project in 2014 working with clinics at 20 large maternity hospitals, Ohio Medicaid, Medicaid insurers, and service agencies to use quality improvement methods to identify eligible women and remove treatment barriers. The number of women eligible for prophylaxis, the percent prescribed a progestogen before 20 and 24 weeks of gestation, and barriers encountered were reported monthly.

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Background: Infants who are born at 34 to 36 weeks of gestation (late preterm) are at greater risk for adverse respiratory and other outcomes than those born at 37 weeks of gestation or later. It is not known whether betamethasone administered to women at risk for late preterm delivery decreases the risks of neonatal morbidities.

Methods: We conducted a multicenter, randomized trial involving women with a singleton pregnancy at 34 weeks 0 days to 36 weeks 5 days of gestation who were at high risk for delivery during the late preterm period (up to 36 weeks 6 days).

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Objective: To analyze the amount of surfactant protein (SP)-B and lecithin/sphingomyelin (L/S) ratio in response to betamethasone (BMS) alone as compared with magnesium sulfate (Mg(2+)), indomethacin (Indo), and nifedipine (Nif) with or without BMS.

Study Design: NCI-H441 human lung cells were grown and distributed into eight plates. BMS and tocolytics were added and the final plates were: control, BMS only, and each tocolytic ± BMS.

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Background: Twin pregnancies are associated with an increased risk of perinatal morbidity and mortality primarily due to spontaneous preterm deliveries. The mean gestational age for delivery is 35.3 weeks and twins account for 23% of preterm births <32 weeks.

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Background: It is unclear whether using fetal electrocardiographic (ECG) ST-segment analysis as an adjunct to conventional intrapartum electronic fetal heart-rate monitoring modifies intrapartum and neonatal outcomes.

Methods: We performed a multicenter trial in which women with a singleton fetus who were attempting vaginal delivery at more than 36 weeks of gestation and who had cervical dilation of 2 to 7 cm were randomly assigned to "open" or "masked" monitoring with fetal ST-segment analysis. The masked system functioned as a normal fetal heart-rate monitor.

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Objective. To determine if there was an increase in postpartum (PP) hemorrhage after decreasing the PP oxytocin dose from 40 to 30 units. Study Design.

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A myriad of factors have been linked to increased risk for intrauterine growth restriction and the associated complications; the majority of which are based on observational statistics of demographics, socioeconomics and patient history. Unfortunately, there is a paucity of factors available that can appropriately address the underlying anatomy and physiology responsible for intrauterine growth restriction. To this point, it becomes necessary to use data acquisition modalities capable of addressing both the etiology and pathology in an effort to improve clinical management strategies.

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Background: Brodifacoum, a superwarfarin, is a common household agent used for rodenticides. We present a case of maternal brodifacoum ingestion that resulted in neonatal death.

Case: A 19-year-old primigravid woman presented at 32 weeks of gestation with spontaneous mucosal bleeding.

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Objective: To determine if supplemental perioperative oxygen will reduce surgical site infection (SSI) following cesarean delivery.

Methods: This is a randomized, controlled trial evaluating SSI following either 30% or 80% fraction of inspired oxygen (FIO2) during and 2 hours after cesarean delivery. Anesthesia providers administered FIO2 via a high-flow oxygen blender.

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We sought to evaluate the effectiveness of daily oral micronized progesterone (MP) in preventing recurrent spontaneous preterm birth (RSPB) and whether MP increases maternal serum progesterone. We performed a pilot, single-center, randomized, double-blind, placebo-controlled trial in women with a prior preterm birth and current singleton gestation at 16 to 20 weeks ( N = 33). The primary outcome was the rate of RSPB.

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Wernicke's encephalopathy (WE) is a metabolic disturbance resulting from severe thiamine deficiency classically described in malnourished alcoholics. Untreated, it can result in stupor, coma, and death. WE has previously been reported as a complication of pregnancy in women with hyperemesis gravidarum.

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