PubMed Health⌕ Search

Biomedical subjects

S Igawa

Publications and source records attributed to S Igawa.

16 recordsLinked to original sources
PubMed1992

[Warming-up under cold environment].

Warming up procedures in the many antecedent reports, are almost under normal ambient temperature and they do not treat the warming up under low temperature. The purpose of this study was to investigate the effects of warming up by intensity and time in submaximal treadmill exercise (90% VO2max intensity during 10 minutes) on physiological parameters under cold environment in climate chamber (room temperature: 10 degrees C, relative humidity: 70%, wind velocity: under 0.2 m/sec). Eight trained collegiate basic skiers performed main exercise for 5 minutes after the following warming up conditions: NoW-up (no warming up), W50-15 (50% VO2max intensity 15 minutes), W70-15(70% VO2max intensity 15 minutes), W50-30(50% VO2max intensity 30 minutes) or W70-30(70% VO2max intensity 30 minutes). It was concluded that the most effective intensity and time of warming up in these conditions were 50% VO2max intensity and 30 minutes duration, that is, rather low intensity and longer duration time. It was suggested that a warming up with a high intensity and short duration was effectless under cold.

Adult↗
PubMed1991

[Effects of rapid weight reduction diet on protein metabolism and physical performance].

The purpose of this study was to provide information on the requirement of nutrition, especially of the protein during rapid weight reduction immediately before a competition of a weight-classification system sport, boxing. Weight reduction period was 9 days. Subjects were divided into three groups of free diet group (group A: n = 5), high protein diet group (group B: n = 5) and ordinary protein diet group (group C: n = 4). Group A had taken food ad libitum. Group B had taken 2.0 g/kg/day of protein in the first half and 1.5 g/kg/day of protein in the second half of weight reduction period, and Group C had taken 1.0 g/kg/day of protein throughout weight reduction period. Groups B and C had taken 2,000 kcal/day in the first half and 1,200 kcal/day in the second half of weight reduction period. Anthropometry and nutritional investigation were performed, and urine components were analyzed. The main results obtained were as follows: 1) Calorie and protein intake in Group A averaged 883 kcal/day and 0.9 g/kg/day in the second half of weight reduction period. 2) 3-methylhistidine and urea nitrogen in urine and 3-Me/Cr increased significantly at the end of weight reduction period in Group A, but decreased significantly in groups B and C. Nitrogen balance changed to a negative value only in group A. Differences in each of urine components were statistically significant between group A and the other two groups at the end of period. 3) Heart rate and oxygen intake at the same submaximal work load increased significantly in group A at the end of weight reduction period, but in groups B and C no noticeable changes were observed.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1991

[Case of primary aorto-jejunal fistula caused by gram-positive cocci].

A 46 year-old man was transferred to our department with a pulsating abdominal mass and back pain. On arrival he suddenly developed hematemesis. CT suggested the presence of an infrarenal aortic aneurysm and the jejunum was filled with contrast medium. An emergency operation was done. We found an aorto-jejunal fistula at the branching point of the renal artery. We directly sutured the aortic wall laceration and the jejunum wall in two layers. Then we resected infrarenal pseudoaneurysm as completely as possible, with replacement by a Dacron Y-shaped prosthesis. Culture of the aortic wall showed gram-positive cocci, but the species could not be identified. Gram stain of the aortic wall also showed infection by gram-positive cocci. The patient is alive and well 3 months after surgery.

Aorta, Abdominal↗
PubMed1987

Minerals in plasma and urine and gustatory function tests for salt in a group of healthy young men.

Detection threshold for salt (NaCl) and discrimination between two levels of NaCl concentration (0.6 and 0.7%) in foods, and their relation to some selected biochemical parameters in plasma and urine (Zn, Na, K, Mg, Ca, Se for plasma and urine, Cu and retinol binding protein for plasma) were investigated in 15 healthy male college students. No subject failed to discriminate the NaCl concentrations in more than 50% of the tests. The rate of correct discrimination (RCD) was not associated with plasma Zn (P-Zn), plasma retinol binding protein (P-RBP), urinary potassium (U-K) or urinary sodium (U-Na), which significantly correlated with RCD in our previous study, while the detection threshold was significantly correlated with urinary Ca-Mg ratio (U-Ca/Mg), urinary Ca (U-Ca), U-Na, and urinary Mg. In the stepwise multiple regression analysis, U-Ca/Mg, plasma Ca, plasma Na, and RCD were selected as significant independent variables. These indicate that the status of minerals such as Na, Ca, and Mg is related to the gustatory function. One possible explanation for the discrepancy between the present and previous results is the elevated P-Zn and P-RBP levels in the present subjects.

Adult↗
PubMed1985

Intraoperative sonography: clinical usefulness in liver surgery.

In the past 4 years intraoperative sonography was performed on 83 patients with primary hepatic carcinoma, 11 with benign hepatic tumor, nine with intrahepatic lithiasis, five with metastatic hepatic carcinoma, and four with other benign hepatic diseases, for a total of 112 patients. Ultrasonography detected primary carcinoma in 80 of 83 patients (96.4%) and intrahepatic metastases in 30 of 33 patients (90.9%), as confirmed later in surgical specimens. Tumor thrombi in the portal vein were detected in nine of 13 patients (69.2%). In patients with intrahepatic lithiasis and benign space-occupying lesions, residual stones could be assessed easily and the nature and location of the lesions identified. Intraoperative sonography demonstrates intrahepatic ductal structures clearly and is the final diagnostic imaging procedure before surgery.

Adenoma, Bile Duct↗
PubMed1985

[Hepatectomy after transcatheter arterial embolization (TAE) for hepatocellular carcinomas].

Subjects of this study were 26 patients with hepatocellular carcinoma who underwent hepatectomy after TAE. They did not develop serious complications due to TAE. A suitable interval between TAE and the planned hepatectomy was about one month, based on AFP levels and the recovery of liver functions. Hepatic arteriography after TAE was useful to observe changes of the blood flow into the liver and the carcinoma, as well as to find intrahepatic metastases. It is also necessary for making final decisions on the strategy of the hepatectomy. The effects of TAE greatly depended on patterns of arterial blood feeding. When the tumor was less than 5 cm in diameter, had a capsule, and was fed by a single artery the necrotic rate was high. TAE was effective in intrahepatic metastases 0.5 cm or more in diameter, which were detectable by hepatic arteriography. TAE had little effect on intrahepatic metastases less than 0.5 cm in diameter, on intracapsular or extracapsular invasion, or on tumor embolus. For tumor embolus in the portal vein, since TAE and hepatectomy give poor results, other methods should be considered.

Adult↗
PubMed1984

Cholangitis.

Explore the source record for details and available documents.

Animals↗