Abstract:
:Phototherapy is one of the most common therapeutic interventions in modern neonatal medicine. Analysis of physiological responses to phototherapy requires understanding the physical effects of incident light under different modes of environmental control. In this study, we tested the effect of initiation of phototherapy under laboratory conditions in a convective incubator maintained in three clinically used servocontrol modes. Under conditions of air servocontrol, the initiation of phototherapy resulted in an abrupt sustained increase in the surface temperature of an infant simulator (a blackened aluminum disc). In contrast, when the surface (skin) temperature was the controlled variable, there was a profound drop in the incubator air temperature. An algorithm that simultaneously controlled both the skin and the air temperatures showed intermediate effects. Under conditions of skin servocontrol, fluctuations in air and environmental temperatures were observed for a period of 3 hours before steady state was reached. These findings are most clearly demonstrated using phase plane plotting techniques. We conclude that wide, abrupt, and sustained changes in the thermal environment of an incubator occur after phototherapy is initiated. Such changes must be anticipated in physiological studies using phototherapy.
journal_name
Am J Perinatoljournal_title
American journal of perinatologyauthors
Dollberg S,Atherton HD,Hoath SBdoi
10.1055/s-2007-994402subject
Has Abstractpub_date
1995-01-01 00:00:00pages
55-60issue
1eissn
0735-1631issn
1098-8785journal_volume
12pub_type
杂志文章abstract::We compared short-term neonatal outcomes between premature infants with spontaneous preterm birth (s-PTB) and those delivered due to preeclampsia (PEC). Data were collected from women with singleton pregnancies admitted with spontaneous preterm labor (PTL) (2002 to 2005) and PEC (2005 to 2007). Patients delivering 24 ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0029-1234036
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:To determine the accuracy of clinically estimated fetal weight (CEFW) in patients with gestational diabetes (GDM), pregestational diabetes (DM), and obesity. STUDY DESIGN:This is a retrospective analysis of Consortium of Safe Labor data. Subjects were classified into six groups: DM, DM and obese, GDM, GDM an...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0033-1334450
更新日期:2014-01-01 00:00:00
abstract::Premature closure of the foramen ovale is a rare cardiac anomaly. Severe right-sided heart failure accounts for the hepatomegaly, ascites, pleural and pericardial effusions, and generalized edema of these hydropic fetuses. Premature closure of the foramen ovale should be a part of the differential diagnosis when unexp...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-994616
更新日期:1994-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study is to assess if women with arrested preterm labor (PTL) have an increased risk of preterm delivery (PTD) compared with healthy pregnant women, and if digital examination, fetal fibronectin (fFn) and cervical length (CL) are prognostic markers for PTD after arrested PTL. STUDY DESIGN:Pro...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0034-1374818
更新日期:2015-01-01 00:00:00
abstract::The aim of the study was to investigate the effect of individual room care in the neonatal intensive care unit (NICU) on the factors that influence mother-preterm infant interaction. Mothers in group I had hospitalization with their preterm infants in an individual room in the NICU. Mothers in group II were not hospit...
journal_title:American journal of perinatology
pub_type: 杂志文章,多中心研究
doi:10.1055/s-0028-1095186
更新日期:2009-02-01 00:00:00
abstract:OBJECTIVE:We have previously shown a decrease in the overall stillbirth rate at our institution in women receiving the seasonal influenza vaccine during pregnancy. The goal of this study was to ascertain factors associated with this decrease. STUDY DESIGN:This was a retrospective cohort study examining the stillbirth ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0034-1544046
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:The aim of this article is to evaluate the accuracy, precision, and safety of transcutaneous carbon dioxide tension (TcPCO2) monitoring at different electrode temperatures in preterm infants in the early postnatal period. STUDY DESIGN:A total of 26 neonates with a median birth weight of 974 g (432-1,694 g) a...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0033-1352485
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:This study aimed to evaluate if maternal serum hormones along the maternal-fetal hypothalamic-pituitary-adrenal (HPA) axis, when drawn prior to labor induction, differed between women who delivered vaginally and those who underwent cesarean. STUDY DESIGN:This was a prospective observational study at a single...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0040-1708801
更新日期:2020-10-01 00:00:00
abstract::We studied the effect of antenatal corticosteroids on the incidence of respiratory disorders in singleton neonates born between 34 and 36 weeks of gestation. Retrospective analysis was conducted of the incidence of respiratory distress syndrome (RDS) and other respiratory disorders (need for mechanical ventilation, co...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-1022470
更新日期:2008-02-01 00:00:00
abstract:OBJECTIVE:To identify characteristics predictive of survival of patients with congenital diaphragmatic hernia (CDH). STUDY DESIGN:Retrospective analysis of clinical characteristics including severity of lung disease measured by oxygenation index (OI) associated with single-center survival in CDH patients (n = 81) from...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0032-1304817
更新日期:2012-05-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to investigate whether maternal bronchial asthma increases the risk for long-term respiratory morbidity of the offspring. STUDY DESIGN:A population-based cohort study compared the incidence of long-term pediatric hospitalizations due to respiratory disease of the offspring of ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0038-1639507
更新日期:2018-09-01 00:00:00
abstract::Hepatoblastoma is a rare childhood embryonal malignancy. Recent reports suggested a linkage between premature birth and later development of hepatoblastoma. In August 2000, we encountered a 24-month-old boy with extremely low birth weight who developed hepatoblastoma with an unfavorable histology. His birth weight was...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2002-25309
更新日期:2002-04-01 00:00:00
abstract::Two cases of fetal myocardial calcification confirmed postnatally are reported. In contrast to other reports, both infants survived with resolution of calcification by 6 and 12 months. Diagnostic investigations failed to confirm the presence of congenital infection. Both pregnancies were complicated by early cocaine u...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2008-1040740
更新日期:1994-05-01 00:00:00
abstract::Discordancy in twins is generally described as a weight difference between the fetuses of 15 to 25% and its prevalence in normal twin gestations is estimated at 15 to 29%. The present study was performed in order to determine the frequency of discordant newborns in uncomplicated triplet gestations. One hundred and fou...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-994724
更新日期:1993-05-01 00:00:00
abstract::Phosphatidylglycerol (PG) in amniotic fluid was quantitatively measured by thin-layer chromatography (TLC) in 941 amniotic fluid samples and related to the presence or absence of respiratory distress syndrome (RDS) in neonates born within 7 days of the amniocentesis. In 639 case tests with PG 1 nmol/ml or more of amni...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-994666
更新日期:1992-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the interobserver reliability of fetal heart rate (FHR) pattern definition and interpretation assessed by physicians at various levels of training using standard Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) definitions and standard principles of interpret...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0032-1326991
更新日期:2013-06-01 00:00:00
abstract:OBJECTIVE:Our aim was to estimate the incidence of unintentional hysterotomy extension at the time of cesarean delivery and to identify associated risk factors and maternal morbidity. STUDY DESIGN:We conducted a secondary analysis of a randomized controlled trial evaluating chlorhexidine-alcohol versus iodine-alcohol ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0038-1676112
更新日期:2019-08-01 00:00:00
abstract:OBJECTIVE:This study aims to identify risk factors for cesarean delivery (CD) surgical site infection (SSI). study design: Retrospective analysis of 2,739 CDs performed at the University of Pittsburgh in 2011. CD SSIs were defined using National Healthcare Safety Network (NHSN) criteria. Chi-square test and t-test were...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0035-1563548
更新日期:2016-01-01 00:00:00
abstract::Objectives This study aims to examine the relationship between hospital birth volume and multiple maternal morbidities among low-risk pregnancies in rural hospitals, urban non-teaching hospitals, and urban teaching hospitals, using a representative sample of U.S. hospitals. Study Design Using the 2011 Nationwide Inpat...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0035-1570380
更新日期:2016-05-01 00:00:00
abstract::Preeclampsia is uncommon prior to 24 weeks gestation and has been associated with partial and complete hydatidiform moles. We present an unusual case in which a patient was diagnosed with preeclampsia at 17 weeks gestation. Ultrasound findings were consistent with a partial hydatidiform mole. Within 24 hours of the on...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2006-934093
更新日期:2006-04-01 00:00:00
abstract::The most frequently used set of gestational age-birth weight curves in the United States is the Colorado (C) standard published in 1963. To investigate the usefulness of this standard in an urban population at sea level, we examined the birth weight vs gestational age data from 56,675 singleton liveborn infants born b...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-999785
更新日期:1987-07-01 00:00:00
abstract::Novel coronavirus disease 2019 (COVID-19) infection occurring during pregnancy is associated with an increased risk of preterm delivery. This case report describes successful treatment of preterm labor during acute COVID-19 infection. Standard treatment for preterm labor may allow patients with acute COVID-19 infectio...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0040-1709993
更新日期:2020-06-01 00:00:00
abstract::There were 107 episodes of pyelonephritis associated with pregnancy or the early puerperium occurring in 103 gravidas investigated retrospectively for information concerning prematurity, low birthweight, and antibiotic susceptibility patterns in the recovered microorganisms. No difference was found in the incidence of...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-999800
更新日期:1987-10-01 00:00:00
abstract:OBJECTIVE:Buprenorphine (BUP) is commonly used for opioid maintenance therapy in pregnancy. Our goal was to determine whether liver dysfunction related to hepatitis C virus (HCV) infection impacts BUP dosing requirements in pregnancy. STUDY DESIGN:This was a retrospective cohort study of pregnant women with antenatal ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0039-1698838
更新日期:2020-01-01 00:00:00
abstract::The aim of this study was to determine the relationship between maternal serum homocysteine levels in preeclampsia and the severity of the disease, neonatal serum homocysteine levels, maternal complications, and fetal outcome. Fifty pregnant women were included in this prospective study, of which 25 were severe (group...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2005-918889
更新日期:2006-01-01 00:00:00
abstract::The purpose of this study was to determine if placental abruption or previa in women with a history of a prior cesarean delivery (CD) can be predicted. A retrospective cohort study of pregnant women with previous CD was conducted in 17 centers between 1996 and 2000. Women developing placenta previa or abruption in the...
journal_title:American journal of perinatology
pub_type: 杂志文章,多中心研究
doi:10.1055/s-2007-981430
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:We sought to determine if maternal prepregnancy body mass index (BMI) is a risk factor for neonatal respiratory morbidity and to determine if increasing BMI decreased the efficacy of betamethasone (BMZ). STUDY DESIGN:This was a secondary analysis of the Antenatal Late Preterm Steroids trial, double-blind, ra...
journal_title:American journal of perinatology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1055/s-0039-1696644
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVE: This study aimed to review the feasibility of nasal high-frequency oscillatory ventilation (NHFOV) in preventing reintubation in preterm infants STUDY DESIGN: This is a retrospective cohort study of all premature newborn infants placed on NHFOV in a single-center neonatal intensive care unit. RESULTS: Twen...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0040-1718738
更新日期:2020-10-19 00:00:00
abstract::Four hundred sixty-four fetuses underwent real time ultrasound examination within 72 hours before birth to evaluate other factors than the weight formula itself that might influence the accuracy of ultrasound weight estimation. The results indicated that fetal sex had no effect on weight estimation accuracy, but that ...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-2007-999866
更新日期:1986-07-01 00:00:00
abstract:OBJECTIVE:To reduce nonactionable oximeter alarms by 80% without increasing time infants were hypoxemic (oxygen saturation [SpO2] ≤ 80%) or hyperoxemic (SpO2 > 95% while on supplemental oxygen). STUDY DESIGN:In 2015, a multidisciplinary team at Connecticut Children's Medical Center initiated a quality improvement proj...
journal_title:American journal of perinatology
pub_type: 杂志文章
doi:10.1055/s-0038-1653945
更新日期:2018-11-01 00:00:00