High pressure protection for jet aspiration catheter
Thrombectomy catheter and high-pressure protection systems for protecting a catheter shaft from high-pressure fluid jets. An illustrative thrombectomy catheter may comprise a catheter body including a catheter lumen extending therethrough. A high-pressure fluid supply tube extends through the catheter lumen from the catheter body proximal end region toward the catheter body distal end region. The high-pressure fluid supply tube is configured for communication with a fluid source near the catheter body proximal end region. The high-pressure fluid supply tube includes jet orifices for expelling fluid jets from the high-pressure fluid supply tube within the catheter lumen. Reinforcement members are disposed within the catheter lumen such that fluid jets expelled from the jet orifices impinge against the reinforcement members.
1 . A thrombectomy catheter, comprising:
a catheter body extending from a proximal end region to a distal end region and including an inner surface defining a catheter lumen extending between the proximal end region and the distal end region;
a high-pressure fluid supply tube extending through the catheter lumen from the catheter body proximal end region toward the catheter body distal end region, the high-pressure fluid supply tube configured for communication with a fluid source near the catheter body proximal end region;
at least one jet orifice for expelling at least one fluid jet from said high-pressure fluid supply tube within the catheter lumen;
an entrainment inflow orifice positioned at the distal end region of the catheter body; and
at least one reinforcement member disposed within the catheter lumen;
wherein the at least one fluid jet expelled from the at least one jet orifice is configured to impinge directly against the at least one reinforcement member.
2 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member comprises a generally tubular body including a plurality of slots extending through a sidewall of the generally tubular body.
3 . The thrombectomy catheter of claim 2 , wherein the plurality of slots each have a length that extends circumferentially about the generally tubular body.
4 . The thrombectomy catheter of claim 2 , wherein the plurality of slots are longitudinally spaced about a length of the generally tubular body.
5 . The thrombectomy catheter of claim 2 , wherein the generally tubular body includes at least one region free from the plurality of slots.
6 . The thrombectomy catheter of claim 5 , wherein the at least one region free from the plurality of slots is positioned adjacent to the at least one jet orifice for impingement of the at least one fluid jet thereagainst.
7 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member comprises a braided tubular body.
8 . The thrombectomy catheter of claim 7 , wherein the braided tubular body includes regions of a lower pic count alternating with regions of a higher pic count along a length of the braided tubular body.
9 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member comprises a tubular collar and a wing portion extending longitudinally from the collar.
10 . The thrombectomy catheter of claim 9 , wherein the wing portion is configured to extend less than 270° about an inner circumference of the catheter body.
11 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member is secured to the inner surface of the catheter body.
12 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member is secured to the high-pressure fluid supply tube.
13 . The thrombectomy catheter of claim 12 , wherein the at least one reinforcement member comprises a plurality of reinforcement members secured to the high-pressure fluid supply tube and axially spaced apart from one another along a length of the high-pressure fluid supply tube.
14 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member comprises polyimide, polyether-ether-ketone (PEEK), stainless steel, or nitinol.
15 . The thrombectomy catheter of claim 1 , wherein the at least one reinforcement member comprises a generally tubular body secured to the high-pressure fluid supply tube.
16 . A thrombectomy catheter, comprising:
a catheter body extending from a proximal end region to a distal end region and including an inner surface defining a catheter lumen extending between the proximal end region and the distal end region;
a high-pressure fluid supply tube extending through the catheter lumen from the catheter body proximal end region toward the catheter body distal end region, the high-pressure fluid supply tube configured for communication with a fluid source near the catheter body proximal end region;
a plurality of jet orifices for expelling a plurality of fluid jets from said high-pressure fluid supply tube within the catheter lumen, the plurality of jet orifices spaced along a length of the high-pressure fluid supply tube;
an entrainment inflow orifice positioned at the distal end region of the catheter body; and
a reinforcement member disposed within the catheter lumen and secured to the inner surface of the catheter body, the reinforcement member comprising a tubular body having an inner surface, wherein the inner surface of the tubular body of the reinforcement member comprises an impingement location for impingement of one of the plurality of fluid jets thereagainst.
17 . A thrombectomy catheter, comprising:
a catheter body extending from a proximal end region to a distal end region and including an inner surface defining a catheter lumen extending between the proximal end region and the distal end region;
a high-pressure fluid supply tube extending through the catheter lumen from the catheter body proximal end region toward the catheter body distal end region, the high-pressure fluid supply tube configured for communication with a fluid source near the catheter body proximal end region;
a plurality of jet orifices for expelling a plurality of fluid jets from said high-pressure fluid supply tube within the catheter lumen, the plurality of jet orifices spaced along a length of the high-pressure fluid supply tube;
an entrainment inflow orifice positioned at the distal end region of the catheter body; and
a reinforcement member disposed within the catheter lumen, the reinforcement member comprising a generally tubular body having a concave inner surface defining a lumen extending through the tubular body;
wherein the high-pressure fluid supply tube extends through the lumen of the tubular body and is secured to the concave inner surface of the tubular body;
wherein the fluid jet expelled from one of the plurality of jet orifices is configured to impinge directly against the concave inner surface of the tubular body.
18 . The thrombectomy catheter of claim 17 , wherein the high-pressure fluid supply tube extends along the concave inner surface of the tubular body.
19 . The thrombectomy catheter of claim 17 , wherein the tubular body is welded to the high-pressure fluid supply tube.