Search PubMed⌕ Search

Biomedical subjects

S Yasuoka

Publications and source records attributed to S Yasuoka.

At least 73 records · Page 4Linked to original sources
PubMed1986

Long-term results and its managements after coronary bypass surgery.

Between 1970 and 1985, 221 patients with coronary artery occlusive disease underwent aorto-coronary bypass (A-C bypass) and other procedures. Among these patients, 187 had A-C bypass alone and A-C bypass in addition to correction of valvular lesions or arterialization of the coronary vein, myocardial puncture by laser. The remaining 34 had surgical corrections for myocardial infarction and its complications. Subjects were 100 patients who underwent A-C bypass alone over 6 months ago and whose follow-up study could be performed in 93 survival cases [corrected]. Subsequently, 94% of the patients have met the criteria for grade I of NYHA functional capacity and have returned to normal work at a mean of 4 years and 2 months after surgery. Improved left ventricular function has been maintained postoperatively in the patients with complete revascularization. Improved operative technique, in addition to intraoperative balloon angioplasty and onlay patch grafting, have increased the patency rate (78% in 1 mm, 94% in 2 mm of coronary diameter) of the grafts with postoperative anticoagulant therapy. On the basis of our long-term observations, coronary bypass surgery, particularly in complete revascularization, provides for significant improvement in both the quality and life expectancy of patients with severe coronary heart disease. Treadmill exercise test and magnetic resonance image (MRI) were useful, non-invasive and acceptable examinations in long-term follow up.

Angina Pectoris↗
PubMed1986

Inhibitory effect of N-(3,4-dimethoxycinnamoyl)anthranilic acid on release of SRS from alveolar macrophages in vitro.

The effects of N-(3,4-dimethoxycinnamoyl)anthranilic acid (N-5') on the release of the slow-reacting substance (SRS) by zymosan- or Ca ionophore-stimulated rat and human alveolar macrophages (AM) were examined in vitro. Disodium cromoglycate (DSCG) was used as a control. N-5' at concentrations of 10(-4)-10(-3) M significantly inhibited the release of SRS from both rat and human AM stimulated by zymosan. N-5' had almost the same inhibitory effect when added to the AM culture system at any time from 180 min before to 30 min after the addition of zymosan. N-5' (10(-4)-10(-3) M) also significantly inhibited the release of SRS by Ca ionophore-stimulated rat AM. N-5' (10(-6)-10(-3) M) had no significant effect on phagocytosis of yeast particles by rat AM. DSCG (10(-6)-10(-3) M) did not inhibit the release of SRS from the zymosan-stimulated rat AM. N-5' was concluded to have a relatively specific inhibitory effect on the non-immunological release of SRS from stimulated AM. It is postulated that N-5' inhibits the process of release of SRS from AM by acting after the initial stage.

Animals↗
PubMed1986

[Inflammatory fibrous histiocytoma of the retroperitoneum].

A 64-year-old man with the chief complaint of abdominal fullness was hospitalized on the suspicion of pancreatic tumor. The tumor was thought to be a pancreatic or retroperitoneal tumor, based on examinations of ultrasonography and CT scan of the upper abdomen, angiography of abdominal arteries, and ERCP. Laparotomy revealed that the tumor was inoperable inflammatory fibrous histiocytoma. Combined anti-cancer chemotherapy with doxorubicin, cyclophosphamide, and vincristine induced partial response. The duration of response was six months, and the patient died of tumor growth 18 months after the initial diagnosis.

Angiography↗
PubMed1985

Comparison of cell profiles of bronchial and bronchoalveolar lavage fluids between normal subjects and patients with idiopathic pulmonary fibrosis.

The cell profiles of bronchial and bronchoalveolar lavage fluids (BLF and BALF) of patients with idiopathic pulmonary fibrosis (IPF) were compared with those of normal volunteers (NV) and age-matched control patients (CP), to characterize the cell profiles of the bronchoalveolar region in normals and patients with IPF. In BALF of nonsmokers from both control groups (NV and CP), alveolar macrophages (AM) were predominant and the percentage of neutrophil leukocytes and that of eosinophil leukocytes below 1% of the total cells. The percentage of neutrophils and that of bronchial epithelial cells were higher in BLF than in BALF of both control groups. Of the immune and inflammatory cells in BLF, the mean percentage of neutrophils was 12% in NV group and 42% in CP group. The percentage of neutrophils and that of eosinophils in BALF were higher in IPF group than in CP group, but the percentage of neutrophils in BLF of IPF group was comparable to that of CP group. In the IPF group, the percentage of neutrophils in BALF was lower than that in BLF. These results indicated that even in healthy subjects, a considerable number of neutrophils are present in the bronchial region and that the cell profile of the lavage fluid of the bronchoalveolar tree changes depending on the method of lavage. Presumably the higher percentage of neutrophils in BALF of patients with IPF is partly due to derangements of the alveolar structure, because the amount of saline infused into this region is limited.

Adult↗
PubMed1985

[Management of malignant tumors of the thymus].

Twenty-eight patients with malignant tumors of the thymus were surgically treated during the 15-year period from 1969 to 1984. Twenty-six patients had far advanced disease when treatment was began. Of fifteen patients with malignant thymoma, the tumors were successfully removed in five patients by using the technique of combined resection of SVC. Of two patients with carcinoid, one is alive and another died two years after extended operation. Of two patients with malignant lymphoma, one with non Hodgkin's disease died three years after operation, and the other with Hodgkin's disease is alive with tumor bearing. It is important to distinguish malignant lymphoma from other types of thymic tumors, because chemo-radiotherapy is superior to surgical therapy. Of nine patients with germ cell tumor, two patients with seminoma have been well for 11 and 5 years. CDDP and radiotherapy were effective on their long survival. Three patients with embryonal carcinoma responded well to combined surgical and chemo-radiotherapy. But only one of them is alive with tumor free one year after operation. Prosthetic grafts were employed in 7 cases for replacement of the innominate and superior caval vein. Angiogram taken one month after operation disclosed the overall patency rate with 92% and the longest patent period confirmed was 4 years. Extended operation by using the prosthetic graft should be performed in the advanced cases to achieve a complete removal and to aim better prognosis for this kind of disease. In conclusion, aggressive surgical removal followed by radio-chemotherapy offers best cure of the malignant thymic tumor.

Adolescent↗
PubMed1983

Effects on nociceptive threshold and blood pressure of intrathecally administered morphine and alpha-adrenergic agonists.

In the present experiments, the time course of the analgesic response (tail flick in rats, skin twitch in cat) and blood pressure effects of intrathecally administered morphine and the alpha-agonists, clonidine and ST-91 were examined in rats and cats. The clonidine analogue, ST-91 has approximately 1/50 the lipid solubility of clonidine. Intrathecally administered morphine and morphine followed by naloxone had no effect on resting blood pressure in unanaesthetized cats and in rats and cats anaesthetized with chloralose-urethane. Inactive when given systemically, ST-91 had a powerful antinociceptive effect when given intrathecally. At analgesic doses, this alpha-agonist produced only a transient hypertension. At doses 4-6 times that required to produce a significant antinociceptive effect, a pressor effect was observed. Intrathecal injection of clonidine in smaller doses produced a transient hypotension, with significant pressor effects present with larger doses.

Adrenergic alpha-Agonists↗