Biomedical subjects
Publications and source records attributed to S Weiner.
The many benefits of ultrasonography in the management of pregnancy are briefly reviewed. The use of a B-mode ultrasound aspiration transducer in the performance of diagnostic amniocentesis is described. This new tool was of considerable assistance in the management of 3 patients.
A significant proportion of the soluble protein of the organic matrix of mollusk shells is composed of a repeating sequence of aspartic acid separated by either glycine or serine. This regularly spaced, negatively charged aspartic acid may function as a template upon which mineralization occurs.
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Between 1956 and 1971, a total of 74 cases of adenocarcinoma of the cervix was treatedin the Division of Radiation Therapy of the University of Maryland Hospital. Radical radiation therapy was followed by routine surgery early in the study;after 1967, surgery was used only for radiation failure. The likelihood of local control and 5-year survival was not improved by the routine addition of surgery to radical radiation, although the incidence of serious complications was markedly elevated. The results of treatment of adenocarcinoma of the cervix by radiation therapy alone are not significantly different from those achieved with squamous cell carcinoma. Surgery should be used as a salvage procedure in case of failure, rather than on a routine basis.
Following unilateral ovarian denervation by ovarian artery stripping in female rabbits, ovulation and pregnancy were achieved within 3 days of denervation. Three weeks later, at repeat laparotomy, ovarian dimensions and the numbers of corpora lutea and pregnancies were noted. Fluorescent histochemical studies confirmed complete adrenergic denervation in five of the rabbits' ovaries. There was no significant difference in ovarian dimensions, numbers of corpora lutea and pregnancies, or the excess of corpora lutea over implantations when the intact control side was compared with the denervated side. The control ovaries demonstrated an average of 5 corpora lutea/ovary and an average of 3.4 conceptuses in the adjacent uterine horn, while the numbers on the denervated side were 5 and 3.2, respectively. Although these findings demonstrate that central neural efferent control is not essential for the occurrence of pregnancy after mating in the rabbit, the potential significance of ovarian neuromuscular mechanisms in these functions is discussed, and future studies are suggested.
Evidence implicates the ovarian nerves in the regulation of hormonal and ovulatory functions. A technique for selectively denervating the in situ rabbit ovary is therefore of considerable investigative value. The ovarian artery was stripped of its adventitia and nerve bundles. Three weeks later, fluorescent histochemistry confirmed the complete absence of adrenergic nerves in the vessel walls and ovarian stroma of the experimental ovary, as compared to the abundant fluorescent structures present in the contralateral control ovary. The surgically treated ovaries demonstrated no significant ischemic or trophic change on gross and routine histologic examination.
The described method for selective sympathetic denervation of the in vivo rabbit ovary involved stripping the ovarian artery of its nerve bundles and adventitial tissue. The ovary was then entirely free of fluorescent-staining adrenergic nerves. This technique was used to study the effects of ovarian denervation on HCG-induced ovulation. After HCG was administered to 22 rabbits which had previously undergone unilateral ovarian denervation, the ovaries were observed for follicular maturation and rupture. Control ovaries demonstrated a mean of 5.6 stimulated follicles/ovary; denervated ovaries had a mean of 5.4. An average of 3.5 follicles/control ovary ruptured; an average of 3.1 follicles/denervated ovary ruptured. Furthermore, the time course of ovulation after HCG did not differ between denervated and intact ovaries. These results indicate that HCG-induced ovulation in the rabbit is not interrupted by ovarian denervation.
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