Abstract:
:The effects of fetal hypoxemia on blood coagulation (platelet count, prothrombin time, partial thromboplastin time, fibrinogen, factors II, V, VI, VIII, IX, X, XI, XII, XIII and von Willebrands activities, fibrin degradation products, and fibrin monomer) were evaluated in nine chronically catheterized fetal lambs early in the third trimester of pregnancy (107-110 days gestation). Seven chronically catheterized fetal lambs of similar gestational ages served as controls. The hypoxemic episode (pO2 14 mm Hg) was maintained for 1 hr in the experimental group during which time there were only minimal changes in PCO2, arterial pressure, heart rate, and pH. Epinephrine and norepinephrine levels increased significantly in stressed animals--22 pg/ml pre- to 1025 pg/ml postepinephrine, and 475 pg/ml pre- to 2292 pg/ml postnorepinephrine. There were no significant changes in blood coagulation factor activities related to the hypoxic stress although, one fetus who experienced acidemia did develop a transient increase in fibrin monomer. Slight through significant increases in VIII coagulant activity activity (4.0%), von Willebrand activity (5.9%), and factor XII activity (4.3%) occurred in both the hypoxemic and control fetal lambs. These changes were associated with minimal increases in the white blood cell count (15%) and slight decreases in the mean arterial pressure (3.9 mm Hg) hemoglobin (1.2 g), and hematocrit (2.9%) and may have been related to the blood loss of 25% that occurred as a result of sampling in both groups. There were no differences between the hypoxic and control animals' levels of coagulation factor activities when measured during an 18-day follow-up period except for a slight increase in factor X activity (10%) in the control animals not apparent in the nine hypoxic animals. Thus an episode of severe fetal hypoxemia in the absence of hypotension, acidosis, and hypercarbia does not lead to acute or chronic alterations in blood coagulation factor activities in the fetal lamb.
journal_name
Pediatr Resjournal_title
Pediatric researchauthors
Kisker CT,Robillard JE,Clarke WRdoi
10.1203/00006450-198201001-00003subject
Has Abstractpub_date
1982-01-01 00:00:00pages
8-12issue
1eissn
0031-3998issn
1530-0447journal_volume
16pub_type
杂志文章abstract::The diagnosis of transient renal tubular acidosis was made in a 16 months old boy. Bicarbonate titration studies revealed that the acidification defect consisted of an association of proximal and distal tubular acidosis. The effect of experimentally induced potassium depletion revealed that hyperkalemia contributed to...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197910000-00020
更新日期:1979-10-01 00:00:00
abstract::The aim of this study was to evaluate the changes in Doppler transmitral flow patterns during the 1st d of life. Doppler echocardiography of the ascending aorta and mitral valve was performed serially in 20 normal neonates at 2, 12, and 24 h of age. A computer-interfaced digitizer pad was used to measure the following...
journal_title:Pediatric research
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
abstract::Kawasaki disease, which is characterized by systemic vasculitis causing coronary arterial involvement in childhood, shows a variety of immunoregulatory abnormalities. Especially the direct or indirect deleterious effects on endothelial cells of cytokines and anti-endothelial cell antibodies (AECA) are considered to be...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199510000-00005
更新日期:1995-10-01 00:00:00
abstract::This study determines the inotropic effects of prostaglandin D2 (PGD2) and prostaglandin E1 (PGE1) in the isolated, arterial perfused newborn (NB) and adult (A) rabbit heart. Significant positive inotropism of PGD2 was observed at all concentrations studied (1 X 10(-17) to 1 X 10(-7) M) in the two age groups; the effe...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198412000-00010
更新日期:1984-12-01 00:00:00
abstract::The aim of this study was to produce a neonatal piglet model which, avoiding vessel ligation, exposed the whole animal to hypoxia and produced dose-dependent clinical encephalopathy and neuropathologic damage similar to that seen after birth asphyxia. Twenty-three piglets were halothane-anesthetized. Hypoxia was induc...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199611000-00014
更新日期:1996-11-01 00:00:00
abstract::This investigation was undertaken to determine the nature of acute alterations in renal function following the production of hypoxemia, hypercarbia, and acidosis in newborn piglets 6-96 hr of age. After completion of the surgical procedure piglets were allowed to recover from the effects of anesthesia. When respirator...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197803000-00013
更新日期:1978-03-01 00:00:00
abstract::Matrix metalloproteinases (MMP) are likely effectors of normal lung development, especially branching morphogenesis, angiogenesis, and extracellular matrix degradation. Because hyperoxia exposure (>95% O(2)) from d 4 to 14 in newborn rat pups leads to arrest of alveolarization and mimics newborn chronic lung disease, ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/01.PDR.0000130658.45564.1F
更新日期:2004-07-01 00:00:00
abstract::Catecholamines (CA) are released from and resynthesized in the adrenal medulla in response to stress. In the mature animal, stimulus-secretion-synthesis coupling occurs through transsynaptic (neuronal) activity. In contrast, in the immature animal, before functional adrenal innervation, certain stressors (hypoglycemia...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199412000-00006
更新日期:1994-12-01 00:00:00
abstract::Several neuropathologic findings in infants and children with human immunodeficiency virus type-1 (HIV-1) infection are different from those observed in adults, probably related to the fact that the retroviral infection occurs in the setting of neuro-development. This report describes the interaction and biologic acti...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199511000-00025
更新日期:1995-11-01 00:00:00
abstract:BACKGROUND:Maternal exposure to pesticides during pregnancy may cause oxidative hemolysis leading to neonatal hyperbilirubinemia. This investigation examined for associations between maternal use of pesticides or repellents during pregnancy and neonatal hyperbilirubinemia requiring phototherapy. METHODS:We used the da...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/s41390-020-1100-6
更新日期:2020-08-05 00:00:00
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journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/s41390-018-0093-x
更新日期:2018-10-01 00:00:00
abstract::Naloxone has been shown to reverse the hemodynamic sequelae of experimental septic shock in adult animal models. Its effectiveness in the newborn has not been studied. To further investigate the efficacy of naloxone, we instrumented 18 piglets for continuous measurement of mean arterial pressure, mean pulmonary arteri...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198608000-00001
更新日期:1986-08-01 00:00:00
abstract:BACKGROUND:Hurricane Maria struck Puerto Rico on 20 September 2017 causing catastrophic devastation. Prolonged shortage of food had been a substantial challenge to the residents after Maria. Experiencing food insecurity in utero has been associated with negative health outcomes later in life. We aim to examine whether ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/s41390-020-0839-0
更新日期:2020-12-01 00:00:00
abstract::Premature newborns are highly susceptible to severe bacterial infections. This is partially due to their immature innate immune system, characterized by decreased neutrophil and monocyte activity as well as by reduced concentrations of complement factors. However, additional mechanisms might be important for innate im...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/01.PDR.0000163397.53466.0F
更新日期:2005-07-01 00:00:00
abstract::In dissociated whole brain cell cultures from newborn mice, we have previously shown that during glucose deprivation under normoxia, D-beta-hydroxybutyrate and oleic acid are increasingly used for energy production. We now asked whether this glucose dependency of the utilization of D-beta-hydroxybutyrate and oleic aci...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198911000-00023
更新日期:1989-11-01 00:00:00
abstract::Sudden infant death syndrome (SIDS) is multifactorial and may result from the interaction of a number of environmental, genetic, and developmental factors. We studied three major genes causing long QT syndrome in 42 Japanese SIDS victims and found five mutations, KCNQ1-K598R, KCNH2-T895M, SCN5A-F532C, SCN5A-G1084S, an...
journal_title:Pediatric research
pub_type: 杂志文章,多中心研究
doi:10.1203/PDR.0b013e3181841eca
更新日期:2008-11-01 00:00:00
abstract::The treatment of multiple acyl-CoA-dehydrogenase deficiency (MADD) includes a low-fat, low-protein, high-carbohydrate diet, avoiding long fasting periods. However, there is no useful biochemical marker to determine the response to different diets or fasting periods. The aims of this study are to report a patient with ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-200107000-00013
更新日期:2001-07-01 00:00:00
abstract::Human and ovine placental tissue homogenates were assayed for dipeptidase activity in vitro. Glycyl-L-leucine, L-leucyl glycine, glycyl-L-lysine, and L-lysyl glycine were hydrolyzed by placental homogenates. The pH optimum for the reaction was 8.0. The relationship between enzyme activity and concentration was linear ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198104000-00013
更新日期:1981-04-01 00:00:00
abstract::Sex steroids accelerate bone maturation, but it is believed that estrogen action is needed for terminal epiphyseal fusion. In this study, we investigated the effects of a new estrogen-blocking agent, Faslodex (ICI 182,780), on estrogen-accelerated skeletal maturation in immature mice. On day-of-life 2 through 8, mice ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199909000-00004
更新日期:1999-09-01 00:00:00
abstract::The gastrointestinal (GI) barrier function is immature in the preterm neonate and might thus facilitate translocation of enteric bacteria and gut-derived septicemia. Circumstantial evidence suggests that bacterial uptake from the intestine may be further enhanced by an alteration of the host nutritional status. To tes...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199603000-00007
更新日期:1996-03-01 00:00:00
abstract::Twelve-h overnight urine and serum samples obtained simultaneously at 20-min intervals were assayed for growth hormone (GH). Ninety-one children, 5 to 16 y (Tanner stage 1 to 3) participated; group 1 were healthy children, group 2 were children with organic GH deficiency, and group 3 had idiopathic growth failure and ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199106010-00019
更新日期:1991-06-01 00:00:00
abstract::Newborn Sprague-Dawley rat pups were found to have reduced net tubular reclamation of the beta-amino acid taurine in vivo. The reabsorption of this compound increased between the 2nd and 4th week of life and the excreted taurine fell despite a rise in glomerular filtration rate indicative of increased transport with m...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197907000-00012
更新日期:1979-07-01 00:00:00
abstract::Three members of a Virginia family with a bleeding disorder were found to have a serum defect in thromboplastin generation similar to the previously reported "Car. factor" deficiency. Sera from three members of the original Car. family did not correct the defect of affected members of the Virginia family. Partial thro...
journal_title:Pediatric research
pub_type: 临床试验,杂志文章
doi:10.1203/00006450-197504000-00009
更新日期:1975-04-01 00:00:00
abstract::Antibodies of restricted specificity have been identified in the human in response to certain antigens. The present study analyzed tetanus and diphtheria antitoxins isolated from selected human sera and suggested a restricted response in antibody production to each of these antigens. Purified antibodies from eight ser...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197712000-00009
更新日期:1977-12-01 00:00:00
abstract::Evidence is inconsistent or poorly understood for links between polychlorinated biphenyls (PCBs), 1,1'-dichloro-2,2'-bis(4-chlorophenyl)ethylene (DDE), and organophosphate (OP) pesticides and adverse pregnancy outcomes, although they are known developmental toxicants. We measured biomarkers of maternal exposure to DDE...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/pdr.0b013e31802d77f0
更新日期:2007-02-01 00:00:00
abstract::During the last few years, advances in the care of low-birth-weight and preterm neonates has stimulated research on the best dietetic program to improve survival and to reduce handicap incidence. At present, fortification of human milk with artificial formulas is the most usual dietetic solution. As yet, however, litt...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199905010-00008
更新日期:1999-05-01 00:00:00
abstract::Low IGF-I levels are found in patients with chronic liver disease, but it is not known whether these reductions in IGF-I are secondary to hepatic dysfunction or to malnutrition. To determine whether malnutrition associated with hepatic dysfunction causes the decrease in these levels, serum and liver IGF-I concentratio...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198911000-00009
更新日期:1989-11-01 00:00:00
abstract::The response to the capsular polysaccharide of Haemophilus influenzae type b (Hib PS) has been used to determine the molecular basis of antibody gene diversity in humans. In contrast to the relatively restricted nature of anti-Hib PS heavy-chain variable region gene expression, a variety of light-chain variable region...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199303000-00022
更新日期:1993-03-01 00:00:00
abstract::We used in vivo microdialysis to determine the impact of a focal hypoxic-ischemic insult on hippocampal amino acid efflux in the immature brain. Microdialysis probes were inserted into the right hippocampus of postnatal d 7 rats. To induce hypoxic-ischemic injury, the right carotid artery was ligated and animals were ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199112000-00021
更新日期:1991-12-01 00:00:00
abstract::To compare the hemodynamic effects of isoproterenol, dopamine, and dobutamine in the immature animal, each drug was infused into anesthetized open chest puppies and cardiac output was measured, as were systemic arterial blood pressure, heart rate, and renal artery blood flow. Cardiac output was increased by dopamine a...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197909000-00011
更新日期:1979-09-01 00:00:00