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Biomedical subjects

M Oikawa

Publications and source records attributed to M Oikawa.

At least 109 records · Page 6Linked to original sources
PubMed1985

[Studies on penetration of antibiotics to gallbladder tissue and bile, its surgical significance. Mainly with cefmenoxime].

Basic and clinical studies in 37 patients with biliary tract disease on comparison between cefmenoxime (CMX) and cefotiam (CTM) were studied and the following results were obtained. In vitro antibacterial activities of CMX and CTM against 25 strains (15 organisms) isolated from bile of patients with biliary tract disease were stronger than that of cefazolin (CEZ). In cholecystectomized patients, CMX (2 g) or CTM (2 g) was injected intravenously, followed by determination of concentration in bile and gallbladder tissue about 2 hours after administration. In CMX administration, the mean concentration in gallbladder bile was 812.1 micrograms/ml, and the mean concentration in duct bile was 1,050.6 micrograms/ml, and the mean concentration in gallbladder tissue was 100.7 micrograms/g. In CTM administration, the mean values were, 1,092.5 micrograms/ml, 1,287.8 micrograms/ml, 28.5 micrograms/g, respectively. The concentration of CMX and CTM were almost similarly. The bile concentration of CMX (i.v.) was compared with CTM (i.v.) by cross-over method in cases of T-tube drainage. The peak bile concentrations of CMX and CTM were as high as 172.4 micrograms/ml and 182.2 micrograms/ml, respectively, 1 approximately 2 hours after 2 g intravenous administrations. Furthermore, the concentration of them were highly gained, 16.1 micrograms/ml of CMX and 33.8 micrograms/ml of CTM, even at 5 approximately 6 hours. In choledochostomized patients, CMX (4 g/day) was injected intravenously, followed by determination of concentration in intraperitoneal exudate. The mean concentration of CMX was 15.3 micrograms/ml on the first day after the operation, and 6.0 micrograms/ml even on the third day after the operation. Those results suggest that the high antibacterial activity of CMX against organism in bile and, the high penetration of CMX to bile, gallbladder tissue and intraperitoneal exudate will promise its important role in treatment of biliary tract infections.

Adult↗
PubMed1984

Gallbladder necrosis after transcatheter hepatic arterial embolization: a technique to avoid this complication.

We present a technique used to avoid unnecessary embolization of the cystic artery in the treatment of hepatoma by transcatheter arterial embolization. A special long tapering catheter that is flexible and soft enough to be inserted into the distal small branches of the heptic artery is used. Embolic material ( Oxycel , absorbable cellulose) was mixed with Mitocin -C (mitomycin) and contrast material. This mixture will help to avoid reflux.

Carcinoma, Hepatocellular↗
PubMed1983

Correlation of the real-time ultrasonographic appearance of hepatic hemangiomas with angiography.

The ultrasonographic appearance of hepatic hemangiomas was studied in 19 patients (31 lesions). The detectability rate by real-time ultrasonography was 77%. A hyperechoic, sharply-marginated and internally homogeneous lesion is highly suggestive of hemangioma. If the hypoechoic lesion has homogeneous internal echoes and/or strong marginal echoes, it is also suggestive of hemangioma. It is difficult to detect small lesions in the lower lateral part of the right lobe and lesions in the right lobe immediately under the diaphragm. Computed tomography should be the next procedure of choice in the evaluation process. If the computed tomography is not characteristic, angiography should be done to confirm the diagnosis.

Adult↗
PubMed1982

[Laboratory and clinical investigations of cefotiam in surgical biliary tract infections].

Laboratory and clinical comparative investigations with cefotiam (CTM) and cefazolin (CEZ) were performed to confirm efficacy and safety in surgical, biliary tract infections. The following results were obtained. 1) The MICs of CTM against organisms, 20 strains, which were isolated from bile of patients with cholecystitis, were studied, especially those of CTM against E. coli and Klebsiella were 0.2 - greater than or equal to 100 micrograms/ml and 0.1--12.5 micrograms/ml, respectively, considerably lower than those of CEZ. And moreover against CEZ-resistant Proteus morganii and Serratia marcescens, CTM showed potent activities, that is, MIC values, 12.5--50 micrograms/ml and 0.78 microgram/ml, respectively. 2) In cholecystectomized patients, 2 grams of CTM was injected intravenously, followed by determination of bile concentration in gallbladder, common bile duct and concentration of gallbladder and liver tissue about 2 hours after administration. The mean bile concentrations of CTM in gallbladder and common bile duct were 1,213.2 micrograms/ml and 1,287.8 micrograms/ml, respectively. The peak concentration of CTM was 2,919.0 micrograms/ml. The mean concentrations of CTM in gallbladder and liver tissue were 28.5 micrograms/g and 45.7 micrograms/g, respectively. On the other hand, the mean bile concentrations of CEZ in gallbladder and common bile duct were 138.7 micrograms/ml and 128.8 micrograms/ml, respectively. 3) Bile concentrations of CTM was compared with those of CEZ by crossover method. The concentration of CTM was 37.7 micrograms/ml even at 5 or 6 hours after 2 grams intravenously administration. CTM showed extremely higher concentration than CEZ in bile. 4) The clinical effect was studied in 6 cases of surgical, biliary tract infections. The results were excellent in 2 cases, good in 3 cases and poor in 1 case, and the clinical efficacy was 83%. 5) CTM was administered to 6 patients who showed negative to intracutaneous reaction test. Nausea, itching, and eruption were observed in each 1 case after intravenously administration of CTM 2 g, however these adverse reactions disappeared within several hours. Throughout the course of treatment, any unusual laboratory findings related to CTM were not observed.

Adult↗