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Biomedical subjects

J C Pezzullo

Publications and source records attributed to J C Pezzullo.

At least 19 recordsLinked to original sources
PubMed2007

Nomograms of the axial fetal cerebellar hemisphere circumference and area throughout gestation.

OBJECTIVE: The widely applied transcerebellar diameter (TCD) obtained at axial cranial imaging, measures the distance between the lateral aspects of the cerebellum and incorporates the width of the cerebellar vermis. Our objective was to create reference ranges of axial fetal cerebellar hemisphere circumference (CHC) and area (CHA), independent of the cerebellar vermis, throughout gestation. METHODS: This cross-sectional study involved pregnant patients between 14 and 41 weeks of gestation. Inclusion criteria consisted of well-established dates (confirmed by early ultrasound), non-anomalous singleton fetuses and intact amniotic membranes. Sonographic measurements included biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (FL), humerus length (HL), TCD, and estimated fetal weight (EFW). Values of axial fetal CHC and CHA were each calculated as the mean of three separate measurements. The 5th, 50th and 95th centiles were estimated at each week of gestational age (GA) by least-squares regression for the mean and standard deviation (SD) of the CHC and CHA as functions of GA. r2 and associated P-values for the relationships of CHC and CHA with other sonographic biometric measurements were calculated. RESULTS: The study included 651 consecutive patients. All attempts at obtaining axial fetal CHC and CHA were successful. Mean maternal age was 27.3+/-6.7 years, median gravidity was 1 (range 1-16), and median parity was 1 (range 0-6). Mean CHC (cm) throughout gestation was modeled as -2.091+0.2563xGA (weeks) (SD=-0.075+0.0164xGA), and mean CHA (cm2) was modeled as 0.245-0.0765xGA+0.00506xGA2 (SD=1.167-0.1565xGA+0.006785xGA(2)-0.00008028xGA3). Fetal axial CHC and CHA correlated significantly and strongly with BPD, HC, AC, HL, FL, TCD and EFW (all R2 values were >or=0.95, and all P-values were <0.001). CONCLUSION: Nomograms of axial fetal cerebellar hemisphere circumference and area throughout gestation, independent of the cerebellar vermis, have been provided.

Abdomen↗
PubMed2006

Anticoagulants versus non-steroidal anti-inflammatories or placebo for treatment of venous thromboembolism.

BACKGROUND: Venous thromboembolism (VTE) is the term given to any thromboembolic event (blocking of a blood vessel by a blood clot) occurring in the venous system. The current treatment recommended for VTE is anticoagulation (reduction of the blood's ability to clot). The aim of this review is to summarize results from randomized controlled trials (RCTs) for the effectiveness of anticoagulants (heparins, including low molecular weight heparins and vitamin K antagonists) in the treatment of VTE, compared to non-steroidal anti-inflammatory drugs (NSAIDs) or placebo. OBJECTIVES: To examine the randomized controlled evidence for the effectiveness and safety of anticoagulant treatment compared to NSAIDs or placebo in patients with VTE on the incidence of fatal and non-fatal pulmonary emboli (PE) and the recurrence or extension of deep vein thrombosis (DVT). SEARCH STRATEGY: The Cochrane Peripheral Vascular Diseases (PVD) Group searched their Specialized Trials Register (last searched 26 July 2005) and the Cochrane Central Register of Controlled Trials (CENTRAL) database (last searched Issue 3, 2005). In addition, DKC also searched reference lists and contacted pharmaceutical companies and experts in the field. SELECTION CRITERIA: All randomized trials of anticoagulants versus NSAIDs or placebo in the initial treatment of VTE (DVT or PE or both). DATA COLLECTION AND ANALYSIS: DKC and JM independently assessed trial quality and extracted data. JCP (biostatistician) analyzed the design elements and feasibility of a future randomized controlled trial to determine definitively efficacy and safety of anticoagulants in VTE treatment. MAIN RESULTS: Two RCTs were included. Data were not pooled because of heterogeneity between the studies. The two RCTs were too small to determine any difference in mortality, occurrence of pulmonary emboli, progression or return of DVT between patients treated with anticoagulation and those receiving no anticoagulation. AUTHORS' CONCLUSIONS: The limited evidence from RCTs of anticoagulants versus NSAIDs or placebo is inconclusive regarding the efficacy and safety of anticoagulants in VTE treatment. The use of anticoagulants is widely accepted in clinical practice, so a further RCT comparing anticoagulants to placebo could not ethically be carried out.

Anti-Inflammatory Agents, Non-Steroidal↗
PubMed2004

Bone marrow fat and bone mineral density on proton MR spectroscopy and dual-energy X-ray absorptiometry: their ratio as a new indicator of bone weakening.

OBJECTIVE: Bone weakening can be affected by agents other than bone mineral density (BMD). Increased bone marrow fat may have a direct link to bone loss. This pilot study analyzes the relationship between bone marrow fat and BMD in subjects with normal and structurally weakened vertebrae. SUBJECTS AND METHODS: Twenty-six subjects underwent both dual-energy X-ray absorptiometry and proton MR spectroscopy of 71 lumbar vertebrae. Fifteen subjects had normal-appearing vertebrae on MRI, and 11 had signs of bone weakening. RESULTS: We found that high bone marrow fat did not consistently equate with low BMD. Bone marrow fat can indicate bone weakening nearly as well as BMD, but neither parameter alone is suitable to be used independently as an indicator. The bone marrow fat/BMD ratio showed significant diagnostic power to detect bone weakening, even in this relatively small subject sample. CONCLUSION: An inverse relationship between bone marrow fat and BMD could not be confirmed. Bone marrow fat can be used to diagnose reduced bone strength nearly as well as BMD. The bone marrow fat/BMD ratio is a significant diagnostic indicator of bone weakening.

Absorptiometry, Photon↗
PubMed2002

Pathology findings in preterm placentas of women with autoantibodies: a case-control study.

OBJECTIVE: To evaluate the placental histopathology findings in women with systemic lupus erythematosus or antiphospholipid syndrome delivered preterm. METHODS: We performed a case-control study comparing clinical outcomes and placental histopathology of 18 consecutive singleton pregnancies with systemic lupus erythematosus (n = 9) or antiphospholipid syndrome (n = 9) delivered between 24 and 37 weeks, and 54 controls matched for gestational age and type of preterm delivery (spontaneous or indicated). Placental examinations were performed by a single pathologist, and placental lesions were grouped into four categories: uteroplacental vascular pathology and related villous lesions; coagulation-related damage; chronic inflammation; and acute inflammatory lesions. Statistical analysis included the Mantel-Haenzsel or Fisher's exact test, and logistic regression, with a value of p < 0.05 or an odds ratio (OR) with 95% confidence intervals (Cl) not inclusive of unity considered significant. RESULTS: Lupus anticoagulant was positive in ten out of 18 cases and medium or high positive IgG anticardiolipin antibodies in seven out of 18. Antenatal treatment included corticosteroids (n = 9), low-dose aspirin (n = 15) and heparin (n = 8). Rates of necrotizing enterocolitis (33% vs. 0%, p < 0.001) and of perinatal mortality (33% vs. 9%, p = 0.02) were significantly different between cases and controls, and rates of birth weight < 10th centile approached statistical significance. Uteroplacental vascular lesions (OR 3.7, 95% CI 1.1, 11.7) and coagulation-related damage (OR 16.8, 95% CI 3.9, 72.6) were significantly more common among cases than controls, and rates of chronic inflammatory lesions approached significance. CONCLUSIONS: Cases of systemic lupus erythematosus and antiphospholipid syndrome delivered preterm are associated with a significant increase in placental vascular and coagulation-related lesions, which are reflected clinically by higher rates of perinatal mortality, necrotizing enterocolitis, and small-for-gestational age neonates.

Adult↗
PubMed2002

Predictive value of transvaginal cervical length in triplet pregnancies for spontaneous preterm delivery at < or = 32 weeks.

OBJECTIVE: To establish whether cervical length is a predictor of spontaneous preterm delivery at < or = 32 weeks in triplet pregnancies. METHODS: This was a case-control study of all triplet pregnancies followed with more than three sonographic assessments of cervical length at 4-week intervals from 1995 to 2000. Cervical length in women delivered spontaneously at < or = 32 weeks (cases) was compared with that of the remaining women (controls). Statistical analysis included Fisher's exact test, chi2 test, one-way analysis of variance, logistic regression and receiver operating characteristic (ROC) curve to determine optimal cervical length thresholds for spontaneous preterm delivery at < or = 32 weeks. RESULTS: Of the 58 women included in the study, 17 (29%) delivered spontaneously at < or = 32 weeks. The preterm delivery group had similar demographic and obstetric variables, but a higher rate of cerclage placement (65% vs 17%, p < 0.001) than controls. Mean +/- standard deviation cervical length was significantly shorter among cases than controls at 16-20.0 weeks (3.0 +/- 1.2 vs. 3.9 +/- 0.8 cm, p = 0.01), but not at 20.1-24.0 weeks (3.5 +/- 1.1 vs. 3.8 +/- 1.0 cm, p = 0.76). Logistic regression analysis determined that cervical length at 16-20 weeks had an odds ratio of 0.43 (95% CI = 0.23, 0.80) for the prediction of spontaneous preterm delivery at < or = 32 weeks. ROC curve analysis identified a cervical length of < or = 2.6 cm as the optimal threshold for the prediction of spontaneous preterm delivery at < or = 32 weeks (sensitivity 41%, specificity 92%). CONCLUSIONS: In a population of triplet gestations with a 29% rate of preterm delivery, cervical length at 16-20.0 weeks, but not at 20.1-24.0 weeks, was inversely correlated with the probability of preterm delivery at < or = 32 weeks.

Adult↗
PubMed2002

Optimal thresholds of the lecithin/sphingomyelin ratio and lamellar body count for the prediction of the presence of phosphatidyl glycerol in diabetic women.

OBJECTIVE: To assess the optimal thresholds of the lecithin/sphingomyelin (L/S) ratio and lamellar body count for the prediction of the presence of phosphatidyl glycerol (PG) in diabetic pregnant women. METHODS: We accessed a database of clear amniotic fluid specimens obtained by transabdominal amniocentesis in diabetic women with singleton non-malformed fetuses. PG results were classified as 'absent' or 'present'. Receiver operating characteristic (ROC) curve analysis was constructed of different L/S ratios and lamellar body counts to identify the optimal threshold for prediction of the presence of PG. Sensitivity was defined as the rate of L/S ratio and lamellar body count above specific thresholds among cases with present PG. The false-positive rate was that of L/S ratios or lamellar body counts above specific thresholds among cases with absent PG. Statistical analysis included one-way analysis of variance with post-hoc analysis, with p < 0.05 considered significant. RESULTS: A total of 76 consecutive women were included in the analysis, 74% (n = 56) using insulin and the remainder treated by diet alone. L/S and PG results were both available in 72 women. PG was reported as 'present' in 70% (51/73) of specimens. As expected, there was a significant relationship between L/S ratios and presence of PG (area under the curve = 0.932, p < 0.001). An L/S ratio of > or = 3.0 represented the optimal trade-off between sensitivity (68%) and false-positive rate (6%) in the prediction of present PG. Similarly, there was a significant relationship between lamellar body count values and presence of PG (area under the curve = 0.976, p < 0.001). A lamellar body count of > or = 50 000 represented the optimal trade-off between sensitivity (92%) and false-positive rate (0%) in the prediction of present PG. CONCLUSION: In diabetic pregnant patients, the presence of PG in the amniotic fluid more closely corresponded to an L/S ratio of > or = 3.0 or to a lamellar body count of > or = 50,000.

Adult↗
PubMed2001

Drug-induced QT prolongation in women during the menstrual cycle.

CONTEXT: Women have a higher incidence of torsades de pointes than men, but it is not known if the risk of drug-induced torsades de pointes varies during the menstrual cycle. OBJECTIVES: To determine if the degree of QT prolongation in response to ibutilide varies with the menstrual cycle phase and to compare QT prolongation between women and men. DESIGN AND SETTING: Cohort study of men and women who received the same intervention conducted between November 1998 and November 2000 at a general clinical research center of a university hospital. PARTICIPANTS: A volunteer sample of 58 healthy adults (38 men and 20 women) aged 21 to 40 years. INTERVENTION: A low dose of ibutilide (0.003 mg/kg), infused intravenously for 10 minutes. Subjects were monitored for 120 minutes. Women received the intervention on 3 separate occasions to correspond with menstrual cycle phases, which were verified by using hormonal assays. MAIN OUTCOME MEASURE: QT interval, recorded from electrocardiogram at timed intervals during and after ibutilide infusion and standardized for variations in heart rate (QTc). RESULTS: Maximum (mean [SD]) millisecond increase in QTc after ibutilide infusion was greater for women during menses (63 [13]) and the ovulatory phase (59 [17]) compared with women during the luteal phase (53 [14]) and compared with men (46 [16]; P =.002 vs menses and P =.007 vs ovulation). Progesterone (r = -0.40) and progesterone-to-estradiol ratio (r = -0.41), but not estradiol (r = 0.14) or testosterone (r = 0.09), were inversely correlated with ibutilide-induced QT prolongation. CONCLUSIONS: Menstrual cycle and sex differences exist in QTc responses to ibutilide, with the greatest increase in QTc corresponding to the first half of the menstrual cycle.

Adult↗
PubMed2001

Association of human milk feedings with a reduction in retinopathy of prematurity among very low birthweight infants.

INTRODUCTION: With the increased survival of very low birthweight (VLBW) infants, weighing less than 1500 g at birth, the incidence of retinopathy of prematurity (ROP), a significant cause of blindness among children in the United States, is also increasing. Preterm infants with a positive diagnosis of ROP during the perinatal period are at increased risk for ocular abnormalities and for deficits in visual function during later periods of development. Human milk has many antioxidant constituents including inositol, vitamin E, and beta-carotene that may protect against the development of ROP. OBJECTIVE: The objective of this study was to examine the effect of human milk feedings on the incidence of ROP among VLBW infants. STUDY DESIGN: Observational cohort study. PARTICIPANTS: We identified 283 VLBW infants admitted to the Georgetown University Medical Center Neonatal Intensive Care Unit (NICU) from January 1992 through September 1993. All infants surviving to receive enteral feeding and ophthalmologic examinations for ROP (n=174) were included in the analysis. METHODS: Type of feeding (human milk versus exclusive formula), presence of ROP, and potential confounding variables were abstracted retrospectively from medical records. ROP was present if any stage of ROP was diagnosed at any age during the initial NICU hospitalization; each case was counted once based on the worse severity of ROP in either eye. Multiple logistic regression was used to control for confounders. MAIN OUTCOME MEASURE: ROP. RESULTS: Major predictors of ROP were similar in both feeding groups including gestational age, days on mechanical ventilation, and total number of days on supplemental oxygen. The incidence of ROP differed significantly by type of feeding (human milk -41.0% vs. formula -63.5%, p=0.005). Human milk feeding independently correlated with a reduced odds of ROP (OR: 0.42, 95% CI: 0.19 to 0.93) (p=0.03), controlling for gestational age, duration of supplemental oxygen therapy, 5-minute Apgar score, and race. Human milk feeding independently correlated with a reduced odds of ROP (OR: 0.46, 95% CI: 0.18 to 0.91) (p=0.03), controlling for birthweight, duration of supplemental oxygen therapy, 5-minute Apgar score, and race. CONCLUSION: Human milk feeding among VLBW infants was associated with a lower incidence of ROP compared to exclusively formula-fed VLBW infants after adjusting for confounding variables.

Apgar Score↗
PubMed2001

Stereoselective halofantrine disposition and effect: concentration-related QTc prolongation.

AIMS: 1) To characterize the variability of multiple-dose halofantrine pharmacokinetics over time in healthy adults, 2) to correlate the pharmacodynamic measure electrocardiographic (ECG) QT interval with (+)- and (-)-halofantrine plasma concentration and 3) to evaluate the safety and tolerance of halofantrine hydrochloride given over time to healthy adults. METHODS: Twenty-one healthy subjects were enrolled and 13 completed the study (180 days). Subjects received either 500 mg of racemic halofantrine once daily in the fasted state for 42 days, or placebo, and then halofantrine washout was documented for the following 138 days. Pharmacokinetic and pharmacodynamic (ECG QTc) measurements were obtained. RESULTS: Mean accumulation half-times (days) for halofantrine were: 7.0 +/- 4.8 [(+)-halofantrine] and 7.3 +/- 4.8 [(-)-halofantrine]. Mean steady-state concentrations were: 97.6 +/- 52.0 ng ml(-1) [(+)-halofantrine] and 48.5 +/- 20.8 [(-)-halofantrine]. Steady-state oral clearance was: 139 +/- 73 l h(-1) [(+)-halofantrine] and 265 +/- 135 l h(-1) [(-)-halofantrine]. Peak plasma concentrations of both (+)- and (-)-halofantrine were attained at 6 h and maximal ECG QTc prolongation was at 4-8 h following drug administration. Fourteen of 16 subjects who received active drug had ECG QTc prolongation that was positively correlated with both (+)- and (-)-halofantrine concentration. The five subjects who received placebo had no demonstrable change in ECG QTc throughout the study. Conclusions Halofantrine accumulates extensively and shows high intersubject pharmacokinetic variability, is associated with concentration-related ECG QTc prolongation in healthy subjects, and is clinically well tolerated in this subject group.

Adult↗
PubMed2001

Premature ovarian failure in women with epilepsy.

PURPOSE: Women with epilepsy (WWE) have an increased risk for several reproductive endocrine disorders that may affect their fertility. The incidence of premature ovarian failure (POF) in women with epilepsy has not been systematically studied. This study examined the incidence of POF in women with epilepsy. METHODS: Fifty consecutively evaluated cognitively normal women with epilepsy, aged 38-64 years, whose seizures began before age 41 years, were interviewed for symptoms of perimenopause and menopause. Endocrine studies, performed in women aged 45 years or younger at the time of evaluation, included serum follicle-stimulating hormone (FSH; done on menstrual cycle day 3 in menstruating women), inhibin A levels when FSH was normal, thyroid-stimulating hormone (TSH), prolactin, and, in menstruating women, menstrual cycle day 20 serum progesterone level. Nonsurgical premature menopause was defined as secondary amenorrhea of >12 months' duration with FSH levels of >14 International Units (IU) in women younger than 42 years. Premature perimenopause was defined by the presence of one or more of the following: somatic perimenopausal symptoms; change in previously regular menstrual cycles without evidence of other reproductive endocrine disturbance; and FSH level of >14 IU or inhibin A level of <7 pg/ml. Similarly aged neurologically normal women seen in the menopause and sleep clinics served as control subjects. Statistical analysis included Fisher's exact test, Kruskal-Wallis test, t test, and multivariate logistic regression analysis with significance set at p < 0.05. RESULTS: Seven (14%) of 50 women with epilepsy had nonsurgical premature perimenopause (six of seven) or menopause (one of seven), compared with three of 82 control (p=0.042). Five of 41 women with localization-related epilepsy (LRE) had POF compared with two of nine women with primary generalized epilepsy (PGE; p=0.595). Mean age of POF was 39.6 years (range, 37-42 years). Seizure duration, age at seizure onset, seizure severity and lateralization, smoking history, age of menarche, body mass index and incidence of depression was not statistically different between women with and without POF. There was no statistically significant association between POF and antiepileptic drugs (AEDs). Women with POF were more likely to have had catamenial exacerbation of their seizures than were women without POF (p=0.02). CONCLUSIONS: Women with epilepsy have an increased risk for developing POF. This finding should be considered in counseling women with epilepsy on family planning.

Adult↗
PubMed2001

Antenatal corticosteroids and placental histology in preterm birth.

To assess the effects of antenatal corticosteroid use on placental histopathology, we have reviewed a database of 463 consecutive non-anomalous singleton liveborns delivered at less than 32 weeks between April 1988 and December 1994, of which 280 received one or more doses of corticosteroids for promotion of fetal lung maturation. Patients were grouped by the number of corticosteroid doses received (analyzed as none, 1, 2 and 3 or more doses). Clinical and demographic factors were recorded prospectively. Placental histopathology was reviewed blinded to clinical factors except gestational age, and 42 distinct placental lesions were examined and scored for severity. Data were analyzed by contingency tables, one-way analysis of variance, and linear regression analysis. Among clinical variables, univariate analysis showed that the number of corticosteroid doses was significantly related to presence of labour prior to delivery, pre-eclampsia, premature rupture of membranes and clinical suspicion or diagnosis of chorioamnionitis. Using linear regression analysis with these clinical variables as confounders, increased number of doses of antenatal corticosteroids was related to increased severity of villous fibrosis and stromal mineralization, and fewer villous infarcts.

Adrenal Cortex Hormones↗
PubMed2000

Critical appraisal of the use of nuchal fold thickness measurements for the prediction of Down syndrome.

OBJECTIVE: Nuchal fold thickness is the best ultrasonographic predictor of fetal trisomy 21. However, the risk assigned on the basis of the commonly used threshold of nuchal fold thickness >/=6 mm does not take into consideration the significant associations between nuchal fold thickness and gestational age and between maternal age and Down syndrome. We propose a new method of calculating Down syndrome probability that takes into account both gestational age at examination and previously assessed probability of Down syndrome. STUDY DESIGN: Nuchal fold thickness was measured at ultrasonographic examination at 14 to 22 weeks' gestation without previous knowledge of the fetal karyotype. Nuchal cystic hygromas were excluded from analysis. Statistical analyses included correlation, logistic regression to control for other ultrasonographic predictors of trisomy 21 and for maternal age, receiver operating characteristic curve, and likelihood ratios (defined as the ratio of the sensitivity to the false-positive rate). P <.05 was considered significant. RESULTS: Mean gestational age at ultrasonography was 16.9 weeks' gestation (range, 14-22 weeks' gestation). Mean (+/-SD) nuchal fold thickness in fetuses with trisomy 21 (4.7 +/- 1.6 mm; n = 29) was greater than in euploid fetuses (3.2 +/- 0.9; n = 780; P <.001). Logistic regression analysis established that nuchal fold thickness was a significant predictor of trisomy 21 independent both of the other ultrasonographic markers and of maternal age (P <.001). Regression analysis showed that nuchal fold thickness was significantly correlated with gestational age among both fetuses with trisomy 21 and euploid fetuses and that the regression line of fetuses with trisomy 21 had a slope similar to that of euploid fetuses. The difference between observed and expected nuchal fold thicknesses on the basis of the biparietal diameter (as a function of gestational age) was used to obviate the confounding effect of gestational age. Differences between observed and expected nuchal fold thicknesses were then used to calculate likelihood ratios. These likelihood ratios could then be multiplied by the individual prior probability to obtain a patient-specific Down syndrome probability. CONCLUSION: Nuchal fold thickness is correlated with gestational age in both euploid fetuses and fetuses with Down syndrome. Use of the difference between observed and expected nuchal fold thicknesses to determine likelihood ratios allows the calculation of individual posterior probabilities of Down syndrome that take into consideration both gestational age and maternal age.

Adult↗
PubMed2000

Use of high-technology care among women with high-risk pregnancies in the United States.

OBJECTIVE: Infant mortality has been reduced dramatically with the development of perinatal regionalized high-technology care. Our objective was to assess use of high technology care among women with high-risk pregnancies in the urban and rural United States. METHODS: The 1988 National Maternal and Infant Health Survey was linked to the 1988 American Hospital Association survey of all obstetrical hospitals. Hospitals were classified into five levels of care based on services and staffing. Women were classified as having high-risk pregnancies using two definitions: (1) gestational age < 34 weeks and birthweight < 1500 g (High Risk I) and (2) the first definition or an antenatal high-risk medical diagnoses (High Risk II). Analyses assessed the proportion of high-risk women delivering in appropriate locations in the rural and urban United States and explored how personal characteristics, insurance status, and use and source of prenatal care influenced where high-risk women delivered. RESULTS: 71.2% of High Risk I and 55.9% of High Risk II women delivered in a high-technology facility (Level IIA or III). Fifty percent of HRI rural women delivered in tertiary high-technology hospitals and 39% of HRII rural women delivered in a high-technology hospital. High-risk urban women were two to three times more likely to deliver in a high-technology facility compared to their rural counterparts. The multivariate analysis showed that Black high-risk women were more likely to deliver in a high-technology setting and that receipt of prenatal care in a private setting lowered the odds of delivering in a high-technology setting when other factors were controlled. CONCLUSIONS: In an era where regionalized perinatal care was not threatened by managed care, a large proportion of high-risk women received care in less than optimal settings. Rural high-risk women delivered in high-technology hospitals less often than their urban counterparts. The multivariate analyses implied that the potential barriers to care may be more important among those considered more socially advantaged, who may be more at the mercy of managed care. The current reimbursement environment, which discourages referral to specialists and high-technology care, could result in less access today.

Adolescent↗
PubMed2000

Risk factors for neonatal intraventricular haemorrhage in spontaneous prematurity at 32 weeks gestation or less.

In this study we aimed to establish which clinical and histopathological factors are associated with early-onset neonatal intraventricular haemorrhage (IVH) in non-iatrogenic preterm delivery before 32 weeks of gestation. We retrospectively reviewed all singleton pregnancies delivered before 32 weeks of gestation after spontaneous onset of preterm labour or preterm membrane rupture during the period January 1993 to June 1997. Clinical and histopathological data in cases with IVH diagnosed at neonatal cranial ultrasound within 72 h of birth (n = 17) were compared with those of neonates not experiencing this complication (non-IVH) (n = 54). Histological lesions analysed were those of acute inflammation and those on a uteroplacental vascular basis. Statistical methods included the Wilcoxon rank sum test, Fisher's exact test, and logistic regression analysis. A P<0.05 was considered significant.IVH and non-IVH groups were not significantly different in birthweight, gestational age at delivery, cord pH at birth, rates of 5-min Apgar score below 7, caesarean delivery, diagnosis of clinical chorioamnionitis or antenatal administration of steroids. Respiratory distress syndrome was more frequently diagnosed in the IVH than non-IVH group (64 per cent versus 33 per cent, P=0.02). Placental acute inflammatory or uteroplacental vascular lesions were present in 100 per cent of IVH neonates versus 22 per cent of non-IVH cases (P<0.001). Logistic regression analysis demonstrated that only respiratory distress syndrome (P = 0.04) and histological evidence of acute placental inflammation (P = 0.02) were significantly and independently associated with IVH. Histopathological evidence of acute inflammatory placental lesions is the best predictor of occurrence of neonatal IVH.

Adult↗
PubMed2000

Predictive value of preoperative tests in discriminating bilateral adrenal hyperplasia from an aldosterone-producing adrenal adenoma.

In primary hyperaldosteronism, discriminating bilateral adrenal hyperplasia (BAH) from an aldosterone-producing adenoma (APA) is important because adrenalectomy, which is usually curative in APA, is seldom effective in BAH. We analyzed the results from our most recent 7-yr series to evaluate the predictive value of preoperative noninvasive tests compared with adrenal vein sampling (AVS). Forty-eight patients with hypertensive hyperaldosteronism underwent bedside testing, computed tomography (CT) imaging, and AVS. Those in whom the results of AVS indicated APA underwent adrenalectomy. Twelve (30%) and 14 (34%) of 41 patients with APA had paradoxical falls with ambulation in plasma aldosterone concentration (PAC) and 18-hydroxycorticosterone (18-OH-B), respectively. Twenty-nine (70%) and 26 (65%) APA patients had a rise in PAC and 18-OH-B, respectively, as did all 8 BAH patients. Significant identifiers of BAH were supine PAC values less than 15 ng/dL (P: = 0.04), an increase greater than 60% (P: = 0.02) in PAC with ambulation, and supine 18-OH-B values less than 60 ng/dL (P: = 0.04). CT imaging alone was not predictive for BAH or APA. In our population, patients with a positive bedside test result (e.g. a fall in PAC and/or 18-OH-B) and a unilateral adrenal nodule on CT (10 of 41 patients) could have proceeded directly to adrenalectomy for APA. However, a positive bedside test result with a negative CT or a negative bedside test result regardless of CT findings required AVS to confirm the diagnosis and site of disease.

Adenoma↗
PubMed2000

Critical reappraisal of the utility of sonographic fetal femur length in the prediction of trisomy 21.

Measurement of femur length (FL) has been advocated as part of a genetic sonogram for the prediction of Down syndrome (DS). However its predictive ability has been inconsistent. We have studied the diagnostic value of this sonographic parameter in a prospective cohort of women with singleton gestations undergoing genetic sonogram between 14 and 22 weeks because of advanced maternal age or family history of aneuploidies. Genetic sonograms were performed at a mean gestational age of 17.0 weeks (range 14-22). DS was diagnosed in 30 fetuses, while 888 were euploid. Mean+/-SD observed/expected (O/E) values of FL (1.00+/-0.10 versus 0.97+/-0.01, p=0.07) were not significantly different between euploid and DS fetuses. Comparison of the regression equations of FL versus biparietal diameter revealed that while the intercepts were not significantly different between euploid and DS fetuses, the difference in slopes reached significance (p=0.04) suggesting that the predictive ability of FL may increase with advancing gestational age. In addition, a MEDLINE search (National Library of Medicine) was conducted for articles published between 1985 and 1998 on fetal femur length in the prediction of trisomy 21. Review of the published literature on the subject suggests that FL is not a consistent or reliable sonographic predictor of DS. Published thresholds of FL should not be used outside of the Institution from which they originated, and each Institution should establish whether this parameter has predictive ability in its own population.

Adult↗
PubMed1999

Risk of abnormal triple screen for Down syndrome is significantly higher in patients with female fetuses.

Previous studies have shown that mid-trimester maternal serum alpha-fetoprotein (AFP) levels are significantly higher and human chorionic gonadotrophin (hCG) levels significantly lower in women with male compared with female fetuses. We have evaluated whether triple-screen criteria are more likely to identify women with female fetuses as at risk for Down syndrome. From the Georgetown University genetics database we obtained the absolute values and corresponding multiples of the median (MoM) for AFP, hCG and unconjugated oestriol (uE3) in singleton gestations for the period database November 1992 July 1996. A Down syndrome risk of 1/270 or greater at mid-trimester was considered as high risk. A total of 977 patients with triple screen and outcome information were identified, including 502 female and 475 male fetuses. Patients with female fetuses were significantly more likely to have lower serum AFP (p=0.003) and a positive triple screen for Down syndrome (72 (14 per cent) versus 45 (9 per cent), p<0.02) than those with male fetuses. The gestational age at triple screen, maternal serum hCG and uE3, race and diabetes were not significantly different between the two groups. Since Down syndrome is less common in female than male fetuses, and the rates of female and male Down syndrome fetuses detected by triple screen and subsequent amniocentesis are not significantly different, the excess of positive mid-trimester maternal serum triple screen in women with female fetuses is likely due to false-positive results.

Adult↗