LUMINAL TISSUE ISOLATION DEVICE AND METHODS FOR USING SAME
Devices and methods for isolating segments of luminal tissue are provided. Aspects of the present invention include catheter devices comprising (a) an outer catheter comprising an outer catheter lumen, (b) an inner catheter positioned within the outer catheter lumen, the inner catheter comprising: (i) first and second inner catheter lumens, (ii) perforations at a distal region of the inner catheter, and (ill) a guidewire passage channel positioned distal to the perforations, (c) a balloon attached to the inner catheter positioned distal to the perforations and proximal to the guidewire passage channel in fluidic communication with the second inner catheter lumen and configured to radially expand, (d) a guidewire positioned in the guidewire passage channel, (e) a first radiopaque marker on the inner catheter distal to the balloon, and (f) a second radiopaque marker at a distal region of the outer catheter.