Patent ID: 7244242

Claim:
A catheter for insertion into a biological passage which contains a first flowing fluid, the catheter comprising: a tubular member having a proximal end and a distal end, the tubular member including a fluid delivery lumen and an inflation lumen; a sheath adjacent the distal end of the tubular member, the sheath having an aperture in fluid communication with the fluid delivery lumen and a flow lumen for passing the first flowing fluid; an inflatable balloon member in fluid communication with the inflation lumen, the inflatable balloon member positioned at least partially around the sheath to enlarge the flow lumen of the sheath and to define a containment pocket defined by the inflation balloon member, the sheath, the aperture and the biological passage when the inflatable balloon member is inflated; and a valve contained within the flow lumen of the sheath, where the valve maintains physiological fluid flow of the first flowing fluid through the flow lumen of the sheath.