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Biomedical subjects

M R Cohen

Publications and source records attributed to M R Cohen.

15 recordsLinked to original sources
PubMed1978

Antigonadotropin (danazol) in the treatment of endometriosis. Evaluation of posttreatment fertility and three-year follow-up data.

Ninety-nine women who completed danazol treatment for endometriosis proved by operation were re-evaluated clinically an average of 37 months later. The recurrence of symptoms was reported by 39 per cent and pelvic findings suggestive of endometriosis were noted in 33 per cent. An average time interval between the end of treatment and the recurrence was 15 months for the entire group. However, 31 women who conceived subsequent to treatment had a much lower recurrence rate of the disease (15 per cent) and a much longer average time until the recurrence (31 months). Of 84 infertile women who desired pregnancy after treatment, 39 conceived, for a pregnancy rate of 46.4 per cent. However, when patients with absolute sterility due to other causes were excluded, the corrected pregnancy rate was 72.2 per cent. The majority of conceptions (23) occurred within the first six months after discontinuation of danazol and a total of 30 occurred within the first year. Four second- and third-trimester intrauterine fetal deaths were observed among women who conceived within the first three cycles after discontinuation of the drug.

Danazol↗
PubMed1977

Office gynecology. Diagnostic survey of the infertile couple.

The diagnostic survey of the infertile couple usually takes about three months. After semen analysis, the husband is referred for general and urologic examination. The wife is given a general physical and pelvic examination and returns during the next two months for ovulation studies. Tubal patency tests are also performed and may in themselves be therapeutic.

Fallopian Tube Patency Tests↗
PubMed1976

A comparative diuretic and tissue distribution study of bumetanide and furosemide in the dog.

Intravenous dose-response data obtained from renal clearance studies in anesthetized dogs indicated that bumetanide was approximately 30-fold more potent than furosemide in enhancing sodium excretion. After the administration of 0.01 mg/kg of bumetanide or 1.0 mg/kg of furosemide, the relationship between i.v. diuretic activity and tissue distribution was evaluated. In dog renal clearance experiments, bumetanide and furosemide significantly enhanced urine flow, sodium and potassium excretion. Inulin clearance as an estimate of glomerular filtration rate was not altered by either drug, but sodium reabsorption was decreased with bumetanide (13%) and furosemide (12%). At these diuretic doses, both compounds were bound to dog plasma protein to about the same extent (86-91%), although total plasma levels were 100-fold higher for furosemide. Within 1/2 hour after the i.v. administration of 14C-bumetanide or 14C-furosemide, 86 to 99% of the 14C in urine, plasma, kidney, and liver appeared as unchanged drug. One minute after maximal diuresis bumetanide was found to have a higher affinity (3-fold) for kidney compared to furosemide. These data offer a possible explanation for the i.v. diuretic potency difference between these two compounds. Furthermore, the lack of significant difference in plasma protein binding and the absence of urinary metabolites of either drug suggest that other factors may also contribute to the marked differences in diuretic activity between bumetanide and furosemide.

Animals↗
PubMed1975

Development of a steerable hysteroscope: studies in the baboon.

A steerable fiberoptic hysteroscope was developed with an integrated fluid circulatory system and a channel that can be used either for operative procedures or for the passage of a uterotubal occlusive device delivery assembly. The hysteroscope was demonstrated to be a safe and practical instrument for intrauterine observations, using the baboon as the animal model. Postpartum baboons were used for a majority of the experiments since the cervix of most cycling animals could not be sufficiently dilated to permit hysteroscope insertion. Estrogen-progesterone treatment resulted in softening of the cervix enough to allow hysteroscopic examination in 66 per cent of the animals so treated. Hysteroscopy was performed on 18 baboons. In almost all cases the uterotubal junctions were visualized and appeared as small slits or depressions. Measurements of the mean uterine length, fundal width, normal cervical diameter, and the diameter to which the cervix can maximally be dilated are reported for cycling, hormone-treated, and postpartum baboons.

Animals↗
PubMed1975

Treatment of endometriosis with an antigonadotropin, Danazol. A laparoscopic and histologic evaluation.

Antigonadotropin (Danazol) was administered to 39 patients with endometriosis diagnosed at laparoscopy and confirmed by laparoscopic biopsy. None of the patients had surgical resection of the lesion prior to the treatment. While on the drug, all patients developed evidence of ovarian suppression both in regard to ovulation and steroidogenesis. The results were evaluated by repeat laparoscopy and biopsy. The extent of the disease was documented before and after treatment by photography and drawing. There was marked decrease in the extent of endometriosis after treatment: 59% of patients had no evidence of disease, 26% had peritoneal adhesions and hemosiderin deposits but no active endometriosis, and 15% had residual endometriosis. Histology in the latter group revealed atrophic changes in the uterine and ectopic endometrium and the evidence of a healing process.

Biopsy↗