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Biomedical subjects

M B Sampson

Publications and source records attributed to M B Sampson.

21 records · Page 2Linked to original sources
PubMed1979

Predictability of gestational hypertension.

Eighty-five women at 28-36 weeks' gestation were studied prospectively in a clinical research center to assess a "roll over test" (RT) based on the original study by Gant et al. Patients were admitted to the hospital, placed on bed rest, and given a balanced diet. The test started 12 hours after admission. Blood pressure was measured every 10 minutes for an hour with the patient in the left lateral position, and then in the supine position for a second hour. The mean diastolic blood pressure was calculated in each position and the patients were sorted into 6 groups based on the magnitude of change in blood pressure. Seventeen patients developed gestational hypertension (GH). Only 3 of 20 (15%) patients with a positive RT developed GH, while 14 of 65 (22%) patients with a negative RT developed GH. Five of 12 patients who had an actual decrease in mean diastolic blood pressure also developed GH.

Adolescent↗
PubMedDate not supplied

Fundal height measurement. Part 4--Accuracy of clinicians' identification of the uterine fundus during pregnancy.

The purpose of this study was to determine how accurately clinicians can identify the uppermost border of the uterine fundus when they obtain fundal height measurements. Clinicians were instructed to identify the uppermost border of the uterine fundus in their usual manner and make a small pen mark on the maternal abdomen at that point. Real-time ultrasonography was then used to locate the actual level of the fundus and measure the distance between the clinician's assessment and the actual level of the fundus. Measurements were obtained from 126 women. Six clinicians participated in the study, and the differences between the clinicians' errors were not statistically significant (F = 1.26; d.f. = 5,120; P = .2873). For the entire series, the mean error was -.45 cm (SD = 1.99 cm), the mean absolute error was 1.25 cm, the maximal error was 8.6 cm, the percentage of errors that exceeded 1 cm was 42.1%, and the percentage of errors that exceeded 2 cm was 20.6%. Examiner error was not associated with factors such as maternal height, prepregnancy weight, present weight, prepregnancy body mass index, parity, gestational weeks, the amount of fat on the anterior abdominal wall, or the presence of the placenta or fetal parts in the fundus. Examiner error was influenced by thickness of the uterine wall and fetal presentation. These findings indicate that clinicians make errors in identifying the uterine fundus in a significant number of cases and that the methods used by clinicians to identify the uterine fundus need to be evaluated and improved.

Anthropometry↗