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Biomedical subjects

S I Welt

Publications and source records attributed to S I Welt.

27 records · Page 2Linked to original sources
PubMed1979

Hemoglobin A1c in normal and diabetic pregnancy.

The usefulness of determining hemoglobin A1c (HbA1c) levels during pregnancy was evaluated. In contrast to previous reports, the HbA1c values did not predict abnormal maternal glucose tolerance or infant birth weight. They did, however, correlate with long-term control of the diabetes of pregnant insulin-dependent patients. The slight decrease in HbA1c values observed as pregnancy advanced was secondary to improved control of diabetes.

Birth Weight↗
PubMed1979

Vertical transmission of group B Streptococcus. Relation to intrauterine fetal monitoring.

A prospective study of 70 mother-infant pairs was designed to evaluate vertical transmission of group B Streptococcus (GBS) in relation to the use of intrauterine fetal monitors (IUFMs). Multiple-site cultures obtained from mothers during the intrapartum interval and those obtained from infants on day 1 and at discharge or day 4 were plated on a selective medium. Thirteen (27.1%) of 48 IUFM-exposed women vs seven (31.8%) of 22 non-IUFM-exposed women had GBS at one or more sites. The GBS colonization with maternally concordant serotypes occurred in eight (61.5%) of 13 infants born to GBS-colonized, IUFM-exposed women vs two (28.6%) of seven infants born to GBS-colonized, non-IUFM-exposed women. While this suggests that vertical transmission of GBS is enhanced by IUFM placement, the differences in these infant rates were not statistically significant.

Cervix Uteri↗
PubMed1978

Nasal colonization of infants with group B Streptococcus associated with intrauterine pressure transducers.

The rate of nasal colonization with group B Streptococcus in infants cultured at the time of discharge from the nursery rose significantly during a four-month interval. Investigation of this trend resulted in detection of group B streptococci in the domes of two intrauterine pressure transducers (IPTs). Subsequent routine sterilization of IPT domes after each maternal use was associated with a decline in infant group B streptococcal colonization to the usual endemic rate in the nursery. Retrospective evaluation demonstrated that colonization in infants born to IPT-monitored women had increased significantly during the study interval and that no increase in colonization occurred in infants born to non-IPT-monitored women. From epidemiologic evidence it appears that use of contaminated IPTs during labor was a nosocomial source of group B streptococcal colonization.

Cross Infection↗
PubMed1978

Concurrent hypertension and pregnancy.

Concurrent hypertension in pregnancy alters the diagnosis and prognosis of both the vascular disease and the gestation. Insight into the physiologic and pathophysiologic changes is essential to assessing the patient's status and to determining what antenatal care may yield the best outcome of the pregnancy. In this monograph we have presented (1) a classification, which correlates well with those currently in use, of the types of hypertension and their causes; (2) a brief review of current fact and theory regarding the effect of hypertension on maternal and perinatal morbidity and mortality; (3) a detailed approach to monitoring the physical and laboratory parameters of the parturient; (4) a rational approach to monitoring the fetoplacental unit; and (5) an analysis of currently available therapeutic regimens that may alter the course of hypertension in pregnancy sufficiently to increase fetal salvage and decrease maternal complications. Certainly more research into the mechanisms of CHP will be forthcoming as will newer and more precise diagnostic aids. Pharmacologic agents with varied hypotensive actions are constantly being developed, and combinations of these may yield more beneficial results.

Amniotic Fluid↗
PubMed1977

Abnormal fetal growth patterns. Ultrasonic diagnosis and management.

Diagnostic ultrasound is a useful tool in the management of high-risk pregnancies and provides valuable information about abnormal fetal growth patterns including excessive fetal size and intrauterine growth retardation. Two patterns of growth retardation can be distinguished ultrasonically. Fetuses exhibiting "reduced growth potential" type patterns have little risk of fetal distress and are readily recognized as small for gestational age at birth. Fetuses suffering from uteroplacental insufficiency frequently exhibit a pattern of biparietal growth arrest in the third trimester. These fetuses have a high risk of fetal distress and should be closely monitored with other parameters of fetal-placental function including serial estriols and oxytocin challenge tests. Utilizing conventional pediatric growth criteria, the existence of intrauterine growth retardation is often unrecognized in this latter group.

Birth Injuries↗