Patent ID: 7186247

Claim:
A medical delivery system for delivering a fluid to a desired location within a body, comprising: a first cylindrical member formed by a first cylindrical member wall and having an aperture positioned along and extending through the first cylindrical member wall; a second cylindrical member formed by a second cylindrical wall and having a diameter greater than the first cylindrical member, the first cylindrical member positioned within the second cylindrical member; a stimulus delivery device delivering a stimulus for repositioning the first cylindrical member relative to the second cylindrical member between a first state wherein the first cylindrical member is positioned within the second cylindrical member so that the second cylindrical member wall extends over a portion of the first cylindrical member wall including the aperture to prevent passage of the fluid through the aperture and a second state wherein the first cylindrical member is positioned within the second cylindrical member so that the second cylindrical member wall extends over a portion of the first cylindrical member wall that does not include the aperture to enable passage of the fluid through the aperture; and a pressure sensing device communicatively coupled to the stimulus delivery device, the pressure sensing device adapted to sense pressure and generate a pressure feedback signal, wherein the stimulus delivery device repositions the first member relative to the second member in response to the pressure feedback signal.