초록 ▼

A catheter having an elongate body has a first lumen extending therethrough. A concave wall is formed in the body proximate the distal end thereof such that the concave wall is a wall of the first lumen. A first slit is formed in the concave wall. The first slit opens in response to decreased fluid

A catheter having an elongate body has a first lumen extending therethrough. A concave wall is formed in the body proximate the distal end thereof such that the concave wall is a wall of the first lumen. A first slit is formed in the concave wall. The first slit opens in response to decreased fluid pressure within the lumen so as to facilitate aspiration via the first lumen. Optionally, a first convex wall is formed in the body such that the first convex wall is a wall of the first lumen. A second slit is formed in the first convex wall. The second slit opens in response to increased fluid pressure within the first lumen so as to facilitate infusion via the first lumen. Optionally, a second lumen extends through a substantial portion of the body. A second convex wall is formed in the body proximate the distal end thereof such that the second convex wall is a wall of the second lumen. A third slit is formed in the second convex wall. The third slit opens in response to increased fluid pressure within the second lumen so as to facilitate infusion via the second lumen. The first lumen is comprised substantially of a comparatively more rigid material to prevent collapse thereof during aspiration and the second lumen is comprised of a comparatively less rigid material so as to maintain a desired overall flexibility of the catheter.

대표청구항 ▼

A catheter comprising: a) an elongate body having proximal and distal ends; b) a first lumen extending through a substantial portion of said body; c) a concave wall formed said body proximate the distal end thereof; said concave wall being a wall of said first lumen; d) a first slit formed in said c

A catheter comprising: a) an elongate body having proximal and distal ends; b) a first lumen extending through a substantial portion of said body; c) a concave wall formed said body proximate the distal end thereof; said concave wall being a wall of said first lumen; d) a first slit formed in said concave wall; e) a first convex wall formed in said body proximate the distal end thereof, said first convex wall also being a wall of said first lumen, said first convex wall being comprised of a more rigid material than said concave wall; and f) wherein said first slit opens in response to decreased fluid pressure within said first lumen so as to facilitate aspiration via said first lumen and wherein said more rigid first convex wall mitigates the occurrence of catheter collapse during aspiration and said less rigid concave wall contributes to the overall flexibility of the body.