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US 8,012,167 B2Granted
Vascular wound closure device and method
AssigneeLoma Linda University Medical Center
InventorsYong Hua Zhu, Wolff M. Kirsch
Life of this patent
Estimating the term…
Abstract
A method and apparatus for closing a vascular wound includes an apparatus that can be threaded over a guidewire into place at or adjacent the wound. The apparatus includes a chamber that encloses a hemostatic material therein. When the apparatus is positioned adjacent the wound as desired, the hemostatic material is deployed from the chamber. Blood contacts the hemostatic material, and blood clotting preferably is facilitated by a hemostatic agent within the material. Thus, the vascular puncture wound is sealed by blood clot formation.
Claims38
An apparatus for subcutaneously delivering a material, comprising:
- an elongate delivery tube having a chamber enclosing a malleable fibrous hemostatic material therewithin;
- an elongate catheter extending longitudinally through the delivery tube, the chamber being defined between the catheter and the delivery tube;
- an elongate pusher member having a distal portion configured to slidably extend through at least a portion of the delivery tube chamber so as to push at least a portion of the material out of the delivery tube, the pusher member having a surface with at least one protuberance disposed proximal a distal end of the pusher member and distal a proximal end of the pusher member so that the surface extends both proximally and distally of the protuberance, the pusher member protuberance having a protuberance length along the elongate pusher member;
- a flexible locking member configured to fit at least partially around the pusher member and adapted to expand in a transverse direction when subjected to generally longitudinal compression, the flexible locking member having a longitudinal length that is greater than the protuberance length;
- wherein the flexible locking member is disposed adjacent the pusher member protuberance so that when the locking member is subjected to generally longitudinal compression, the locking member expands transversely to engage the pusher member protuberance and the pusher member surface adjacent the protuberance to increase friction between the pusher member and the locking member so that the pusher member is restrained from moving relative to the locking member.
2 more elements
An apparatus for subcutaneously delivering a material, comprising:
- an elongate delivery tube having a chamber enclosing a malleable fibrous hemostatic material therewithin, a distal portion of the delivery tube having a smaller diameter than a proximal portion of the delivery tube;
- an elongate catheter extending through the delivery tube, the chamber being defined as space between the catheter and the delivery tube, the distal portion of the delivery tube engaging the catheter;
- an elongate pusher member having a surface with at least one protuberance, and additionally comprising a distal portion configured to slidably extend through at least a portion of the delivery tube so as to push at least a portion of the material out of the delivery tube, a portion of the pusher member having a diameter less than the proximal portion of the delivery tube but greater than the distal portion of the delivery tube so that when the pusher is moved distally relative to the delivery tube, the pusher member portion engages an inner surface of the distal portion of the delivery tube and deforms the delivery tube, the pusher member portion being disposed within the delivery tube chamber proximal of the hemostatic material so that the hemostatic material is enclosed between the pusher member portion, delivery tube and catheter;
- a flexible locking member configured to fit at least partially around the pusher member portion and adapted to expand in a transverse direction when subjected to generally longitudinal compression;
- wherein the flexible locking member is disposed adjacent the protuberance on the pusher member portion so that when the locking member is subjected to generally longitudinal compression, the locking member expands transversely to engage the pusher member protuberance and the pusher member surface adjacent the protuberance so as to increase friction between the pusher member and the locking member so that the pusher member is restrained from moving relative to the locking member, and wherein the locking member simultaneously engages the pusher member and the delivery tube.
2 more elements
An apparatus for subcutaneously delivering a material, comprising:
- an elongate delivery tube having a chamber enclosing a malleable fibrous hemostatic material therewithin;
- an elongate catheter extending longitudinally through the delivery tube, the chamber being defined between the catheter and the deliver, tube;
- an elongate pusher member having a distal portion configured to slidably extend through at least a portion of the delivery tube chamber so as to push at least a portion of the material out of the delivery tube, the pusher member having a surface with at least one protuberance disposed proximal a distal end of the pusher member and distal a proximal end of the pusher member so that the surface extends both proximally and distally of the protuberance;
- a flexible locking member configured to fit at least partially around the pusher member and adapted to expand in a transverse direction when subjected to generally longitudinal compressions;
- wherein the flexible locking member is disposed adjacent the pusher member protuberance so that when the locking member is subjected to generally longitudinal compression, the locking member expands transversely to simultaneously engage the pusher member protuberance and the pusher member surface adjacent the protuberance to increase friction between the pusher member and the locking member so that the gusher member is restrained from moving relative to the locking member.
2 more elements
Dependencies are inferred from the claim text.