The investigation of the tube with one way valve and the micro-pump for the wearable catheter, and the possibility of patients' daily activity

Abstract

Flexible single and double lumens (FSL and FDL) catheters were designed as temporary blood accesses for the patients with shunt trouble, acute renal failure and other diseases. They are made of silicone rubber which has superior anti-coagulability, and sufficient blood flow is obtained through them. New micro-pumps were developed to inject heparin continuously. The lumens of the catheters were prevented from clotting, using less than 1200 unit of heparin in most cases. Bleeding accident was not observed in our cases by using the tube with one way valve and lock type connection. As a result, FSL and FDL catheters were used safely. Patients with these catheters can walk freely and regain daily activity.