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Biomedical subjects

D G Hall

Publications and source records attributed to D G Hall.

At least 91 records · Page 5Linked to original sources
PubMed1976

Effects of subtoxic lead levels on pregnant women in the state of Missouri.

Cords, placentas, placental membranes, and maternal and fetal blood were collected from 249 women delivered in Columbia, Missouri (Region I). The same samples were obtained from 253 women delivered in Rolla, Missouri (Region II), near lead mining areas. The incidence of term pregnancies with early membrane rupture was 0.41% in Region I and 17% in Region II. The incidence of premature deliveries was 3% and 13.04% respectively. Lead concentration in blood and placental tissues of term pregnancies revealed no significant changes. In term with early membrane rupture, blood concentration of lead was higher, as was the case in placental tissues and cord. Lead concentration was highest in membrane tissues, in mug/100 grams (Regions I and II respectively): placenta, 6.0 +/- 0.01 and 7.0 +/- 0.03; cord, 11.0 +/- 0.34 and 12.0 +/- 0.18; membrane, 38.9 +/- 2.64 and 45.3 +/- 3.12. A high positive correlation (r = 0.2941) between lead concentration in maternal and fetal blood existed. Both were significantly (P less than 0.01) higher in preterm pregnancies and early membrane ruptures than in term pregnancies. These data suggest that subtoxic levels of lead could increase the incidence of early membrane rupture and premature deliveries.

Ceruloplasmin↗
PubMed1975

Position of rectal fistula in relation to the hymen in 46 girls with imperforate anus.

Forty-six records of infant girls with so-called imperforate anus have been reviewed to determine the position of the rectal opening in relation to the hymen. Eight of these children proved to have the cloacal deformity, in which the rectum enters high into a single tube and just behind the opening of a double or septate vagina, with the urethra entering anteriorly at the same level. No normal hymen was visible in these eight children. Seventeen patients had a normal-appearing hymen, and no rectal opening on the perineum. In each of these 17 children the rectal opening was found above the tissue flap overlying the posterior vestibule. In the remaining 21 patients, the hymen was visible and appeared normal, and there was a rectal opening somewhere on the perineum between the vestibule and the normal position for the external sphincters. These findings suggest that in the presence of a normal-appearing hymen, and in the absence of a normal anus, the rectal opening will be either in the posterior part of the vestibule or on the perineum. Where no hymen was visible, we have found in a limited experience that the rectal opening was high in the pelvis in some degree of the so-called cloacal deformity.

Anus, Imperforate↗