| 主权项 |
1. A system for collecting a flow from a blood vessel, comprising:
a collection member including:
an elongated, flexible tubular portion terminating at a distal end;an annular sealing member movably disposed relative to and about the tubular portion and spaced from the distal end;a collection lumen;a proximal end adapted to be positioned extracorporealy and connected to a source of suction for applying a suction to the collection lumen;at least one distal port in fluid communication with the collection lumen, the at least one distal port being located distal to the sealing member; andat least one proximal port in fluid communication with the collection lumen, the at least one proximal port adapted to be disposed intracorporeally and proximal to the sealing member;wherein the annular sealing member, by moving relative to the tubular portion, is adapted to proportionate a flow from the blood vessel entering the collection lumen from the at least one distal port and the at least one proximal port, and wherein the annular sealing member is configured to move proximally along the tubular portion so as to alter an inlet area of the proximal port, and wherein the annular sealing member is configured to move distally along the tubular portion so as to alter an inlet area of the distal port; and wherein when the suction is applied to the collection lumen, the flow from the blood vessel is adapted to enter the collection lumen through both of the at least one distal port and the at least one proximal port. |
