Patent ID: 8038644

Claim:
A catheter for insertion into a hollow viscus of a subject, comprising: a drainage opening and an instillation opening at a distal end; an inlet port at a proximal end for instilling an instillation fluid; an outlet port at the proximal end for draining fluid from the viscus; a drainage channel connecting the drainage opening to the outlet port; an instillation channel connecting the inlet port to the instillation opening; a valve that is located proximate the drainage opening at the distal end for closing the drainage channel against the entry of fluid from the viscus; a valve control port at the proximal end for receiving a control fluid under pressure; and a control channel connecting the valve control port to the valve such that the valve is responsive to admitted control fluid under pressure to close the drainage channel, the catheter being such that flow of the control fluid to the valve is one way and the valve stays closed after the control fluid has entered the catheter under pressure.