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Biomedical subjects

J R Wolff

Publications and source records attributed to J R Wolff.

At least 163 records · Page 9Linked to original sources
PubMed1977

The unwed pregnant teenager and her male relationship.

A group of 100 primiparas, 17 years of age and younger, were interviewed one to three days postpartum. From these interviews, the quality of the relationship between the patient and the father of the newborn child was scored in three categories. Contrary to popular opinion about illegitimacy, it was found that in the majority of cases a good, continuing relationship was maintained throughout the pregnancy, despite the fact that 97% of the patients were unmarried. Fully 84% of the fathers of the unborn children has ongoing contacts with the patients; 68% of the fathers reported that they liked the idea of having the baby, whereas only 9% disliked the pregnancies. The relationship scores were compared with the occurrence of complications in the patient's labor and delivery. Statistical analyses revealed that the relationship between the teenage obstetric patient and the father of her child was not associated with the occurrence of complications in the patient's labor and delivery. However, trends indicate a possible association between these two variables.

Adolescent↗
PubMed1975

The effect of "ouabain" on the ultrastructure of cerebral arterioles and surrounding tissue, studied by a cannulation of a cerebral artery.

A technique for cannulation of a parietal branch of the middle cerebral artery is described by which high but local concentrations of substances can be achieved in cortical vessels. Using this technique it was shown that ouabain, a specific inhibitor of the Na+-K+-ATPase enzyme system, can produce alterations in the blood brain barrier (BBB) permeability as seen by the passage of Evans Blue into cortical tissue. Electron microscopy revealed changes in the endothelium of cerebral arterioles ranging from an increase in the number of vesicles and vacuoles to complete breakdown of cytoplasm and membranes. Swelling of the peri-arteriolar end feet of protoplasmic astroglia and of dendrites was characteristic of tissue surrounding affected arterioles. Swollen fibrous astrocytes, oligodendrocytes and microglia were not seen even in areas of vasogenic edema. These results are discussed in terms of current ideas of the BBB and astroglial function.

Animals↗
PubMed1975

Cerebrovascular ultrastructural alterations after intra-arterial infusions of ouabain, scilla-glycosides, heparin and histamine.

Cardiac glycosides which inhibit Na/K-ATPase (ouabain, scilliroside, scillirosidin) as well as heparin and histamine were infused into a cannulated branch of the middle cerebral artery or by isolated head perfusion in cats and dogs. Ouabain permeating the blood-brain barrier (BBB) caused the same selective swelling of astrocytes and of certain presynaptic elements as after direct application to the brain tissue. The other cellular elements of brain tissue and the vascular endothelium did not react, although the latter was exposed to the highest drug concentrations (about 10-3 M ouabain). By the swelling about one third of the capillaries became more or less constricted accompanied by an increase in endothelial vesiculation and in the number of osmiophilic inclusions in all cells of the vascular wall and of the pericapillary tissue. Osmiophilic material resembling plasma proteins occured in widened intercellular clefts indicating an increased BBB permeability after survival times (40 min). In contrast to the capillaries some terminal vessels are dilated which may correspond to shunt vessels causing an inhomogeneous, even increased cerebral blood flow after ouabain. Scilliroside and scillirosidin cause essentially the same changes as ouabain, but of smaller intensity and extent. In the present study, neither histamine nor heparin caused any structural change of the vessels or brain tissue.

Animals↗
PubMed1975

Emotional reaction to sterilization.

Ninety-four patients sterilized by tubal occlusion were interviewed at the time of hospitalization for surgery and followed at scheduled intervals for a 2-year period. There were no serious problems, medical or psychologic, and all but 3 patients were pleased and satisfied at the end of 2 years. There were no technical failures. Psychosomatic symptoms do develop. They are more prominent and persist longer in the younger age group. Patients having these symptoms are those who had difficulty with contraceptive technics, have a limited understanding of the sterilization procedure, and continue to question its permanency. The need for preoperative evaluation and counseling is emphasized.

Adolescent↗