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Biomedical subjects

I Jansson

Publications and source records attributed to I Jansson.

At least 91 records · Page 5Linked to original sources
PubMed1979

Surface ultrastructure of human arteries with special reference to the effects of smoking.

The surface ultrastructure of uterine arteries from 20 women was studied with scanning electron microscopy. Specimens were excised and fixed under pressure shortely after removal of the uterus during hysterectomy. Two groups of patients were selected: non-smokers and women who smoked more than 15 cigarettes a day. The prevalence of seven different morphological criteria was evaluated without knowledge of the smoking habits of the patients. Endothelial cells were usually well demarcated and distributed with their length axis paralledl to that of the artery. The cell nucleus was revealed by a gentle bulging into the lumen, and cell borders by the presence of rows of microvilli. Inter- and intracellular holes alon the cell borders were more common in arteries from smokers, whereas microvillie were more common on the cell surfaces of arteries from non-smokers. These differences might be related to cell injury. Previous studies indicate that holes are more frequent in injured than in non-injured cells, whereas the surface of injured cells is often smoother than that of non-injured cells. Therefore, these data may be taken to suggest that smoking can lead to endothelial injury in man.

Adult↗
PubMed1977

The acute effect of hysterectomy on ovarian blood flow.

Ovarian stromal blood flow was measured by 133xenon-clearance technique in five women before and immediately after abdominal hysterectomy preserving the adnexae. The interval between the two measurements ranged from 35 to 76 minutes. The rate of xenon clearance was reduced by 52 to 89 percent in four of the women who were in the fertile age and by 29 percent in one postmenopausal subject. These findings indicate that acute reductions in ovarina blood flow may be responsible for the postoperative transient drop in ovarina steroid levels in peripheral plasma reported earlier.

Adult↗