Akira Kusuyama

Percutaneous stenting for malignant biliary stenosis.

SummaryPercutaneous stenting for malignant biliary stenosis is quite beneficial to patients with unresectable or recurrent disease, tremendously improving the quality of their lives. Percutaneous transhepatic biliary drainage (PTBD) was attempted in 92 patients with obstructive jaundice during the period between January 1986 and July 1989. Implantation of an endoprosthesis was performed in 14 cases (15.2%) and succeeded in 12 (85.7%). When a guide wire could not be passed distally across the stricture site, percutaneous transhepatic cholangioscopy (PTCS) through the dilated PTBD fistula was carried out to enable its passage. PTCS is also valuable in the preoperative diagnosis of obstructive jaundice. The patients who are not candidates for surgery are suitable for this procedure. A Miller double-mushroom stent is used as the endoprosthesis in the majority of cases. One patient with recurrent hepatoma has lived at home with this stent for >3 years due to repeated transarterial embolization and chemotherapy and does not need to wash or change the stent.

Laparoscopic cholecystectomy with an ultrasound surgical aspirator

Laparoscopic cholecystectomy using an ultrasound surgical aspirator has been performed in our department since March 1991. The horn cover was altered in order to be inserted through a trocar 10 mm in diameter. The main purpose of this device is to explore Calots triangle by fragmentation and aspiration of the fatty tissue without damaging the nerves, vessels, and cystic duct. First the serosa of the Calots triangle is cut via electrocautery with the sharp-angle hook dissector we designed. Then the cystic duct and cystic artery are efficiently exposed by the ultrasound surgical aspirator. This procedure is perfectly adapted for laparoscopic cholecystectomy. We obtained favorable results with the ultrasound surgical aspirator in 135 cases including 40 cases with a negative gallbladder, as evaluated by endoscopic retrograde cholangiography. In conclusion, the ultrasound surgical aspirator is suitable for skeletonizing the cystic duct and cystic artery, and the procedure is perfectly safe.