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Collection catheter and kit

  • US 8,708,986 B2
  • Filed: 09/14/2009
  • Issued: 04/29/2014
  • Est. Priority Date: 11/07/2006
  • Status: Active Grant
First Claim
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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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