Collection catheter and kit
First Claim
1. A system for collecting flow from a blood vessel, the system comprising:
- a. a collection member including;
i. a flexible tubular portion defining a collection lumen, the tubular portion having a distal end and a proximal end, the distal end defining a fluid inlet to the collection lumen, the proximal end being constructed to connect to a source of suction that applies suction to the collection lumen;
ii. an expandable annular sealing member located adjacent to the distal end of the tubular portion, wherein the annular sealing member comprises a radial distal end having an expanded distal diameter, a radial proximal end having an expanded proximal diameter greater than the expanded distal diameter, and an annular surface inclined between the radial distal end and the radial proximal end;
iii. a first pressure sensor that senses a first pressure in the blood vessel at a location on a first side of the annular sealing member; and
iv. a second pressure sensor that senses a second pressure in the blood vessel at a location on a second side of the annular sealing member, wherein an expanded size of the annular sealing member is based at least in part on the first pressure and the second pressure;
b. a valve that controls suction applied to the collection lumen, wherein the valve is selectively opened and closed based upon a timing interval following a specific event, wherein the application of suction draws the blood vessel into contact with the annular surface; and
c. a support device positionable at a location distal to the distal end of the tubular portion, wherein the support device is configured to support the blood vessel during the application of suction.
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Accused Products
Abstract
A catheter for collecting fluid such as blood from a vessel such as a coronary sinus of a patient has an elongated, flexible tubular portion and an annular sealing member spaced from a distal end of the tubular member. A proximal end of the tubular member is adapted to be connected to a source of suction for applying suction to a collection lumen of the tubular member. The distal end is placed in a blood vessel with the sealing member spaced from opposing surface of the vessel in an absence of a suction applied to the collection lumen. Suction is applied to the collection lumen in an amount sufficient to draw blood from the vessel through the fluid inlet and into the collection lumen and further sufficient to urge the opposing surface of the vessel to migrate into sealing engagement with the sealing member.
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Citations
13 Claims
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1. A system for collecting flow from a blood vessel, the system comprising:
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a. a collection member including; i. a flexible tubular portion defining a collection lumen, the tubular portion having a distal end and a proximal end, the distal end defining a fluid inlet to the collection lumen, the proximal end being constructed to connect to a source of suction that applies suction to the collection lumen; ii. an expandable annular sealing member located adjacent to the distal end of the tubular portion, wherein the annular sealing member comprises a radial distal end having an expanded distal diameter, a radial proximal end having an expanded proximal diameter greater than the expanded distal diameter, and an annular surface inclined between the radial distal end and the radial proximal end; iii. a first pressure sensor that senses a first pressure in the blood vessel at a location on a first side of the annular sealing member; and iv. a second pressure sensor that senses a second pressure in the blood vessel at a location on a second side of the annular sealing member, wherein an expanded size of the annular sealing member is based at least in part on the first pressure and the second pressure; b. a valve that controls suction applied to the collection lumen, wherein the valve is selectively opened and closed based upon a timing interval following a specific event, wherein the application of suction draws the blood vessel into contact with the annular surface; and c. a support device positionable at a location distal to the distal end of the tubular portion, wherein the support device is configured to support the blood vessel during the application of suction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification