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Biomedical subjects

H Ohyanagi

Publications and source records attributed to H Ohyanagi.

At least 127 records · Page 7Linked to original sources
PubMed1985

[Epidemiological studies on pancreatic cancer].

An epidemiological study on pancreatic cancer was performed, using for evaluation reports from the Ministry of Public Welfare and the National Pancreatic Cancer Registration Committee and cases experienced at the First Department of Surgery in Kobe University Hospital. The incidence of pancreatic cancer was found to have increased over the lost few decades. Aged subjects with family histories of malignant diseases and cases having past histories of chronic pancreatitis were affiliated with the high-risk group for this disease. Cigarette smoking and beverage consumption were also shown to be increased risk factors for pancreatic cancer. Poor results obtainable with the types of treatment presently available for pancreatic cancer indicated the clinical significance of applying screening methods for subjects in the high-risk group.

Adult↗
PubMed1985

[Hormonal and functional changes and the quality of life in the late phase after gastric surgery for cancer].

The effects of gastrectomies and those reconstructions for gastric cancer on gut hormone release, GI tract transit time, RISA absorption test and triolein digestion and absorption test were investigated clinically. The patient's quality of life was evaluated by the reconstructive methods. In the cardiectomy type, gut hormone response was markedly increased. The transit time was significantly shortened. In the Billroth I and the interposition types, gut hormone response was slightly decreased. The transit time was normal. In the Billroth II and the Roux-en-Y types, gut hormone response was decreased. The transit time was prolonged. Serum glucose was markedly increased in the Roux-en-Y type. Absorption in protein was depressed in Billroth II and that in fat in Roux-en-Y. Quality of life was best in Billroth I, Billroth II, interposition, Roux-en-Y and cardiectomy in descending order. Postoperative changes of gut hormones and metabolism and the quality of life are influenced by the type of reconstructive procedure. For this reason, for the surgical treatment of cancer of the stomach, it would seem that partial, not total, gastrectomy is more appropriate if meeting the conditions of radical cancer treatment. Moreover, it seems to be indicated that a reconstructive procedure which allows food to pass through the duodenum is the procedure to choose.

Gastrectomy↗
PubMed1985

[Therapeutic approaches to the severe type of acute pancreatitis].

The therapeutic problems of acute pancreatitis were discussed by analyzing data on 110 patients we experienced recently. The overall mortality was 8.2%. Of the severe cases classified by our assessment for the severity, 82.4% had undergone a surgical operation with the mortality 21.4%. Numerous, manifold pre-operative complications were recognized in 89.3% of the surgical treated severe cases. Each of the died cases had two or more of these complications. In order to improve the results of operative management for acute pancreatitis, the therapeutic approaches to severe pancreatitis were studied experimentally with necrotizing pancreatitis in dogs. Based on these experimental results, it was suggested that the effective results may be obtained by means of administering a protease inhibitor in inhibiting the activity of enzymes released from the pancreas, and a plasma exchange, a new therapeutic measure with the aim of directly removing harmful enzymes and toxic substances from inside the body. Then, finally, the surgical procedure of pancreatectomy should be applied to the affected tissue with the aim of eradicating the source for the release of the pancreatic enzymes.

Acute Disease↗
PubMed1984

Surgical use of fluosol-DA in Jehovah's Witness patients.

The effects of Fluosol-DA 20% on circulating blood cells, hemodynamic parameters, blood gases, and organs are described and compared with the results of phase I human studies and animal experiments. Bleeding of preoperative anemia and/or surgical bleeding, Fluosol-DA 20% was administered to 7 of 10 Jehovah's Witness patients treated in this hospital. Six received 1,000 ml and the seventh received 2,000 ml. Hematological changes were examined after the administration of a 1-ml test dose and at early and late stages of Fluosol-DA 20% administration. Hemodynamics and blood gases were measured before and after infusion of Fluosol-DA 20%. Hepatic function was also determined. A drop in neutrophils and platelets was observed in some patients after the injection of a 1-ml test dose. This transient reaction was of short term, and the neutrophil and platelet levels recovered spontaneously. Both the efficacy and the safety of Fluosol-DA 20% were demonstrated in these patients.

Adult↗
PubMed1984

Development of a perfluorochemical emulsion as a blood gas carrier.

Over 10 years of research has led to the development of a perfluorochemical (PFC) emulsion that can be utilized clinically as a blood gas carrier. The physiochemical properties of this PFC emulsion and their biophysiological effects on animals meet the minimum requirements of an oxygen transport medium. As PFC is chemically and biochemically inert, its toxicity is extremely low. Acute toxicity was related chiefly to the particle size of the emulsion. PFC particles injected intravenously are phagocytized in the reticuloendothelial system as foreign bodies and are excreted from the lungs. The excretion rate was roughly proportional to the vapor pressure of each PFC. An emulsion consisting of 7 parts perfluorodecalin and 3 parts perfluorotripropylamine, 20% (wt/vol) PFC final, Fluosol-DA 20%, was selected as the best formulation in view of efficacy, stability, and excretion rate. No untoward reactions were observed after administration of this emulsion. More than 400 patients have received intravenous Fluosol-DA 20% in Japan.

Animals↗
PubMed1984

A perfluorochemical emulsion as an oxygen carrier.

Fluosol-DA 20%, a perfluorochemical emulsion consisting of 7 parts perfluorodecalin (FDC) and 3 parts perfluorotripropylamine (FTPA), has been used as an oxygen carrier in clinical studies. The emulsion, however, must be stored frozen because it is not stable for long in a liquid state. To increase the stability of perfluorochemical emulsions, a series of experiments on stability, elimination, and toxicity were conducted on different perfluorochemicals. F-4-Methyloctahydroquinolidizine (FMOQ) was selected as the best material. The tissue half-life of FMOQ in rats was estimated to be 7 days, which is the same as that of FDC, a perfluorochemical in Fluosol-DA 20%. FMOQ emulsified with a mixture of yolk phospholipid and Pluronic F-68 was stable at 4 degrees C for 6 months. Rats exchange-transfused to a hematocrit of 4% with this emulsion survived for 13 weeks.

Animals↗
PubMed1984

[Effect of total parenteral nutrition on the nutritional status and immunocompetence in host and on the tumor growth].

Present study was undertaken to reveal the effects of total parenteral nutrition (TPN) on the immunocompetence associated with nutritional status and on the tumor growth. The 4-nitro-quinoline-1-oxide induced Sato Lung Carcinoma was transplanted subcutaneously on the back of Donryu rats. Rats were controlled by TPN, low calorie infusion or oral feeding for one or two weeks. Each group was subdivided into chemotherapy and non chemotherapy group. Chemotherapy was performed with adriamycin or ACNU. Tumor bulk was bigger in the well nourished TPN rats than in malnourished group, revealing an accelerated tumor growth by TPN. Despite no significant change in polyamine level and phosphorylation activity, thymidine kinase activity and mitotic index in tumor were significantly higher in TPN than in low calorie infusion. Compared to the results of low calorie infusion, higher activity of IgG, IgM plaque forming cells and lymphocytic blastformation by PHA was suggested the good maintenance of both cellular and humoral immunity in well nourished rats. There was no positive evidence to support the facilitated effect of chemotherapeutic agents in TPN. However, TPN decreased an incidence of adverse reactions of chemotherapy such as loss of weight, leukopenia. Survival rate of rats at nine weeks after treatment also showed the favorable effect of TPN on chemotherapy.

Animals↗
PubMed1984

[Keypoints and compositions of total parenteral nutrition for patients with low glucose tolerance levels].

Management of total parenteral nutrition (TPN) in depressed glucose metabolism was investigated clinically and experimentally in view of insulin control and/or new component of carbohydrate solution. Fifty TPN cases out of 837 for 9 years were successfully performed insulin control, while 17 patients were unable to get sufficient calory in spite of insulin administration. Cumulative expired CO2 after injection of radioactive carbohydrate in rats showed that each carbohydrate was utilized in the order of glucose, fructose, maltose, sorbitol and xylitol even in depressed glucose metabolism and that depressed carbohydrate metabolism was improved by adequate insulin injection. Combined use of glucose, fructose and xylitol at 4:2:1 (GFX) was was experimentally revealed to be superior to glucose alone as carbohydrate source of TPN in depressed glucose metabolism. Compared with conventional TPN (C-TPN), GFX-TPN showed lower blood glucose and insulin level in rabbits of sepsis and rats of streptozotocin diabetes. Contents of fructose 2,6 bisphosphate and triglyceride and activities of fructose 6 phosphate 2 kinase, acetyl CoA carboxylase and fatty acid synthetase in liver of these animals supported that GFX had favourable effects on glucose and fat utilization in depressed glucose Blood glucose of early postoperative patients was lower in GFX-TPN than in C-TPN.

Animals↗
PubMed1982

Clinical studies of a perfluorochemical whole blood substitute (Fluosol-DA) Summary of 186 cases.

After the experimental and phase one studies of our so-called "artificial blood," Fluosol-DA (20%), an emulsified mixture of perfluorodecalin and perfluorotripropylamine, were successfully completed, phase two and three clinical studies were carried out on 186 patients in Japan. The initial dose was 20 ml/Kg body weight (BW), and additional 10 ml/Kg BW doses were applied as needed. Oxygen-supplying and plasma-extending effects were established. No untoward reaction was observed in any of the 186 cases except in a case that involved long-term repeated administration. Initial studies on FLuosol-DA suggest reasonable safety; however, additional clinical trials appear warranted.

Adolescent↗