MICROINJECTION CATHETER

摘要

An insertion device for delivering media inside a patient includes an outer guide tube having a side port. An inner guide tube is nested within the outer guide tube and movable axially within the outer guide tube. The inner guide tube includes a deflector at an end within the outer guide tube. The device also includes a catheter nested within the inner guide tube and movable axially within the inner guide tube. The deflector of the inner guide tube is positionable such that it deflects the dispensing end of the catheter outward through the opening in the outer guide tube when the catheter is advanced axially within the inner guide tube. A therapeutic delivery cannula may be nested within the catheter, such that the deflected end of the catheter determines the direction of travel of the therapeutic delivery cannula into patient tissue when the cannula emerges from the catheter.

主权项

1. An insertion device for delivering media inside a patient, the insertion device comprising:
an outer guide tube having a closed end configured for insertion into patient tissue, the outer guide tube defining a side port in a wall of the outer guide tube near the closed end; an inner guide tube nested within the outer guide tube and movable axially within the outer guide tube, the inner guide tube including a deflector at an end within the outer guide tube; and a catheter nested within the inner guide tube and movable axially within the inner guide tube and including an insertion end; wherein the deflector of the inner guide tube is positionable in relation to the opening of the outer guide tube such that it deflects the insertion end of the catheter outward through the opening in the outer guide tube when the catheter is advanced axially within the inner guide tube.