Methods and apparatus for cryogenic treatment of a body cavity or lumen

摘要

Methods and apparatus for the treatment of a body cavity or lumen are described where a heated fluid and/or gas may be introduced through a catheter and into treatment area within the body contained between one or more inflatable/expandable members. The catheter may also have optional pressure and temperature sensing elements which may allow for control of the pressure and temperature within the treatment zone and also prevent the pressure from exceeding a pressure of the inflatable/expandable members to thereby contain the treatment area between these inflatable/expandable members. Optionally, a chilled, room temperature, or warmed fluid such as water may then be used to rapidly terminate the treatment session.

主权项

1. A tissue treatment system, comprising:
an elongate lumen having a distal tip and a flexible length, wherein the lumen further has a body; at least one infusion lumen positioned through or along the elongate lumen; at least one delivery lumen in fluid communication with the infusion lumen positioned through or along the elongate lumen, wherein the delivery lumen defines one or more openings therealong; a balloon into which the elongate lumen is positionable; a sheath translatable relative to the elongate lumen, wherein distal or proximal translation of the sheath selectively controls a number of the one or more openings which remain unobstructed and also correspondingly adjusts an expanded length of the balloon according to the number of one or more openings which are unobstructed; and, a reservoir having an ablative fluid in fluid communication with the at least one delivery lumen, wherein introduction of the ablative fluid within the delivery lumen passes the ablative fluid through the unobstructed one or more openings and into contact against an interior surface of the balloon.