Search PubMed⌕ Search

Biomedical subjects

S Kanazawa

Publications and source records attributed to S Kanazawa.

At least 199 records · Page 11Linked to original sources
PubMedDate not supplied

Percutaneous feeding gastrostomy in patients with a partial gastrectomy: transhepatic approach with CT guidance.

BACKGROUND: Percutaneous gastrostomy in patients with a partial gastrectomy is rarely performed because the gastric remnants are generally small, positioned high subcostally, and overlaid by the transverse colon and the left lobe of the liver. METHODS: We performed percutaneous transhepatic feeding gastrostomy in four patients with a partial gastrectomy whose conditions precluded oral feeding. The gastric remnant was punctured with a 22-gauge percutaneous transhepatic cholangiography needle through the left lobe of the liver with computed tomography guidance and following tract dilation over the guidewire 8 or 9F. Cope loop catheters were fluoroscopically placed. RESULTS: No obvious complications were encountered during the procedures. The catheter feedings were continued for 2 to 7 months without any serious problems. CONCLUSIONS: We conclude this technique can be performed easily and may be safe because of the presence of the adhesion between the remnant and the liver, which prevents a massive hemorrhage or the displacement of the catheters.

Aged↗
PubMedDate not supplied

Asymptomatic membranous obstruction of the inferior vena cava due to large intrahepatic collaterals.

This paper presents a case of asymptomatic membranous obstruction of the inferior vena cava with a rare hemodynamic pattern consisting of large intrahepatic venous connections between the right inframembranous and the middle supramembranous hepatic vein. These remarkably large collaterals obviated significant enlargement of the azygous venous system and the development of a Budd-Chiari syndrome.

Aged↗
PubMedDate not supplied

Localization of small pulmonary nodules for thoracoscopic resection: use of a newly developed hookwire system.

We developed a stainless steel spring hookwire, 0.28 mm in diameter and 10 mm in length, with a 30-cm-long, 5-0 nylon monofilament suture firmly attached to its funnel-shaped end. A 21-gauge, 10-cm-long cannula was used as an introducer, and a 24-gauge, 10-cm-long blunt-pointed needle as a pusher. The hookwire was successfully placed into the target pulmonary parenchyma under computed tomography guidance in two patients with a small pulmonary nodule. The attached string served as a clear guide at thoracoscopy. Flexibility of the exposed suture through the skin eased wire management after placement. No wire dislodgement occurred.

Adult↗
PubMedDate not supplied

The effects of grapefruit juice on the pharmacokinetics of erythromycin.

OBJECTIVE: To study the effects of grapefruit juice on the pharmacokinetics of erythromycin. METHODS: The effects of grapefruit juice intake on the pharmacokinetics of erythromycin were investigated in six healthy male volunteers, who received 400 mg erythromycin with either water or grapefruit juice. The measurement of erythromycin in plasma samples were achieved by simple Sep-Pak CN cartridge extraction coupled with the electrochemical determination HPLC method, which was developed for the determination of erythromycin in human plasma in the present study. RESULTS: Grapefruit juice, compared with water intake, significantly (P<0.05) increased the mean Cmax value (1.65+/-0.94 versus 2.51+/-0.68 microg/ml) and the mean AUC0-12 value of erythromycin (5.92+/-3.25 versus 8.80+/-1.32microg.h/ml). However, the Tmax and t1/2 values of erythromycin were not affected by grapefruit juice intake. CONCLUSION: These results indicate that the bioavailability of erythromycin was increased by the inhibitory effect of grapefruit juice on cytochrome P450 (CYP) 3A4-mediated metabolism in the small intestine.

Administration, Oral↗
PubMedDate not supplied

Bile duct stenosis due to portal cavernomas: MR portography and MR cholangiopancreatography demonstration.

We report two cases of bile duct stenosis due to portal cavernomas. Smooth stenoses were seen arising from both walls of the common bile duct on magnetic resonance (MR) cholangiopancreatography. On contrast-enhanced MR portography, peribiliary tortuous vessels were evident, indicating portal cavernomas. MR imaging can evaluate the biliary tree and portal systems noninvasively and was useful for evaluating this condition.

Aged↗
PubMedDate not supplied

Virtual CT colectomy by three-dimensional imaging using multidetector-row CT for laparoscopic colorectal surgery.

Laparoscopic colorectal surgery has been attracting attention for its capacity to improve the quality of life (QOL) of patients. However, there are disadvantages to this approach, namely, it is difficult to obtain an image of the entire view of the operative field, and organs and lesions cannot be manipulated directly by the surgeon during surgery. For this reason, it takes a relatively large amount of time to ligate vessel, which can vary between patients. Furthermore, vessels and organs can be damaged during lymph nodes dissection under laparoscopic guidance, leading to heavy bleeding that prevents the surgeon from having access to a good view of the operative field. Then, to assess preoperatively the vascular anatomy, we carried out multiphase, contrast-enhanced examinations using multidetector-row CT (MDCT) on patients with colorectal cancer, and prepared the fused image of 3D images of arteries, veins, the colorectum, organs, and tumor. We called the utilization of 3D imaging virtual CT colectomy, which contributed to rapid and safe manipulation of the origins of the arteries and the veins, as well as lymph nodes dissection, without incurring injury to the involved arteries and veins.

Colectomy↗
PubMedDate not supplied

Transcatheter embolization of pulmonary artery false aneurysm associated with primary pulmonary hypertension.

A 29-year-old woman with primary pulmonary hypertension presented with recurrent hemoptysis. Contrast-enhanced CT of the chest demonstrated the enhanced mass surrounded by consolidation related to parenchymal hemorrhage. Pulmonary angiography suggested that the mass was a pulmonary artery false aneurysm. After a microcatheter was superselectively inserted into the parent artery of the false aneurysm, the false aneurysm was successfully treated by transcatheter embolization with coils. Her hemoptysis has never recurred.

Adult↗