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Biomedical subjects

S Umeda

Publications and source records attributed to S Umeda.

At least 91 records · Page 5Linked to original sources
PubMed1984

The presence of siderosomes in synovioblasts (B cells) of chronic spontaneous hemarthrosis. Histologic, electron microscopic, and roentgenographic electron microanalysis studies of three cases.

The synovium of three patients with chronic spontaneous hemarthrosis was examined by light and electron microscopy and roentgenographic electron microanalysis. The synovium showed hyperplastic villous processes with proliferation of synovioblasts (B cells) and synovial macrophages (A cells). Erythrophagocytosis was observed in synovial macrophages but not in synovioblasts. Synovioblasts, however, had more numerous siderosomes than did synovial macrophages. Ferritin granules were identified in the cytoplasms of synovial macrophages and synovioblasts as well as in the intercellular space. It was noted that the longer the interval following the hemorrhagic episode, the fewer the siderosomes and erythrophagosomes in synovial macrophages. Therefore, it is likely that synovioblasts take up ferritin and/or inorganic iron released from synovial macrophages in chronic local iron overload.

Adult↗
PubMed1983

[Survival and late results following surgical treatment of coronary artery disease].

Two hundred and thirteen patients underwent surgical treatment for coronary artery disease from 1968, May to 1983, Feb. at our Department. Clinical diagnosis was stable angina in 55 patients, unstable angina in 47, angina with complication in 9, myocardial infarction in 54, and post-infarction complication in 48. Two hundred consecutive postoperative patients were evaluated. There were 11 late deaths occurred including 4 cardiac deaths in origin. Causes of late cardiac deaths were sudden death in 2 patients and cardiac decompensation in 2 patients. Reinfarction was seen in 1 out of 2 sudden deaths. This case underwent only left ventricular aneurysmectomy without A-C bypass grafting. Preoperatively, 49.2% of the patients were in NYHA 2, 34.8% in NYHA 3, and 15.9% in NYHA 4, but postoperatively 86.3% in NYHA 1 and 13.7% in NYHA 2. Reoperative surgical indications were native coronary progression in 1 patient, graft obstruction in 1, and ascending aortic aneurysm in 1. Surgical treatment of coronary arterial disease has still many problems to be solved, especially in patient with cardiogenic shock, multi-vessel disease, cerebral vascular disease, abdominal aortic aneurysm and patient of old age. But, we believe the surgical treatment will make much progress with development of myocardial preservation, assisted circulation, membrane oxygenator and simultaneous operative techniques including complete revascularization.

Adolescent↗
PubMed1980

Toe-to-hand transfer: experience with thirty-eight digits.

Great functional difficulty and mental agony are experienced when there is traumatic amputation of the thumb or multiple fingers or a congenital defect of the thumb or fingers. With the development of microsurgery during recent years, it has become possible to transfer toes to the hand, which is an excellent procedure for reconstruction of defective thumbs and fingers. This procedure was used on 32 patients involving 38 digits with satisfactory results.

Adolescent↗