Biomedical subjects
Publications and source records attributed to R Samson.
Chronic debilitating hematological disorders and cytotoxic drugs may create conditions causing a predisposition to fungal infections of vascular grafts. Under such circumstances routine bacteriological investigations should be supplemented by specific fungal media cultures and microscopic examination of removed infected graft.
CEA, in combination with the time-honored barium enema, sigmoidoscopy, rectal examination with guaiac determinations, and thorough clinical history, is a useful tool for the colorectal surgeon in following the progression of disease in both colorectal carcinoma patients and patients who have certain premalignant conditions. In this high-risk group of patients, CEA determinations as well as colonoscopy are becoming increasingly useful. That tumors on the left side are associated with higher CEA levels than those on the right side, due to vascular invasion or the grades of the tumors, and that often CEA antigenicity and severity of symptoms in ulcerative colitis correlate well, are emphasized. Finally, following total colectomy in five cases of ulcerative colitis, all CEA titers decreased to the normal range and have remained there.
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After acute myocardial infarction there is a shortening of the QS2 interval and the ejection time. The pre-ejection time is either normal or prolonged. After the stage of maximum shortening of the QS2 interval and ejection time, there is a progressive improvement towards the normal. In this study there was no correlation between the shortened QS2 interval and ejection time, and the level of urinary catecholamine excretion. The physiological and clinical significance of these changes in the systolic time intervals and their relation to the altered haemodynamics and mechanics are discussed.
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