Catheters for various region organizational medical therapy

摘要

An integrated catheter assembly (10) for enabling diverse in situ therapies includes a catheter (12) with an irrigation fluid lumen (38), a distal tip portion (27) with electrodes (29A, 29B) that act as a hemostat and a needle (23) for injection therapy that extends through the catheter lumen (19) and a lumen in the distal tip portion (30). A needle hub structure (21) carries the catheter and provides a sealing entrance for a needle that can be displaced between extended and retracted positions. The needle and electrodes are electrically isolated. The apparatus provides a physician the options of irrigating tissue, cauterizing tissue or injecting tissue without the need for removing the apparatus from the working channel of an endoscope.