Patent ID: 9295818
Filing Date: 2016-03-29
CPC Classification: A61B,A61M

Claim Text:
1. Apparatus for accessing the wall of a body lumen while simultaneously providing zone isolation and fluid bypass capability, the apparatus comprising: an erectable proximal isolation barrier capable of making a sealing engagement with the wall of the body lumen; an erectable distal isolation barrier capable of making a sealing engagement with the wall of the body lumen; a bypass tube secured to, and extending between, the proximal isolation barrier and the distal isolation barrier, the bypass tube comprising a lumen communicating with an area of the body lumen proximal to the proximal isolation barrier and with an area of the body lumen distal to the distal isolation barrier so that fluid may pass from the area of the body lumen proximal to the proximal isolation barrier through the bypass tube to the area of the body lumen distal to the distal isolation barrier; a working tube being spaced from, and being formed separately from, the bypass tube and passing through the proximal isolation barrier, through the distal isolation barrier, and terminating in the area of the body lumen distal to the distal isolation barrier, the working tube comprising a lumen communicating with an area proximal to the proximal isolation barrier and with the area between the proximal isolation barrier and the distal isolation area, the working tube comprising a slot communicating with the lumen of the working tube, the slot having a length greater than its width and being sized and configured to provide an opening for instruments to pass through in order to access a portion of the wall of the body lumen positioned between the proximal isolation barrier and the distal isolation barrier; and a guidewire tube being formed separately from the bypass tube and the working tube, the guidewire tube being positioned in the lumen of the working tube so that the guidewire tube extends through the proximal isolation barrier, through the distal isolation barrier, and terminates in the area of the body lumen distal to the distal isolation barrier; wherein the diameter of the bypass tube is greater than the diameter of the working tube and the diameter of the working tube is greater than the diameter of the guidewire tube.