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US 7,682,373 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 a guidewire and/or other surgical implement extending from the wound. A hemostatic material is advanced over the surgical implement and into contact with an area of the blood vessel surrounding the wound. The surgical implement is removed. Blood soaks the hemostatic material, and blood clotting is facilitated by the hemostatic agent within the material. A sealing layer of adhesive can be applied to the hemostatic material, confining the blood flow to the material. Thus, the vascular puncture wound is sealed by natural blood clot formation.
Claims35
An assembly for closing a vascular wound comprising:
- a hemostatic material adapted to facilitate blood clotting sufficient to close the vascular wound;
- a delivery tube defining a chamber configured to accommodate the hemostatic material therewithin, the delivery tube having a proximal end and a distal end, the hemostatic material being carried within the chamber;
- an apparatus configured to position the distal end of the delivery tube at or near a vascular wound;
- and
- a pusher member having a distal portion configured to fit at least partially through the proximal end of the delivery tube without deforming the delivery tube, the pusher member and delivery tube releasably connected to one another with the distal portion of the pusher member fit at least partially into the proximal end of the delivery tube and proximal of the hemostatic material within the chamber, a portion of the pusher member having a diameter larger than an inner diameter of at least a portion of the delivery tube;
- wherein the pusher member and delivery tube are configured so that as the pusher member is moved distally relative to the delivery tube while the hemostatic material remains within the chamber, the pusher member engages the delivery tube proximal of at least a portion of the hemostatic material and through that engagement deforms the delivery tube so as to create at least one opening for the hemostatic material to exit the chamber.
3 more elements
A method for closing a vascular wound, comprising:
- providing an assembly comprising a delivery tube and a pusher member, the delivery tube defining a chamber having a hemostatic material disposed therewithin, the pusher member having a distal portion configured to fit at least partially through a proximal end of the delivery tube, an engagement portion of the pusher member having a diameter larger than an inner diameter of at least a portion of the delivery tube, the chamber being substantially closed so that the hemostatic material remains enclosed within the chamber and the pusher member engagement portion disposed generally proximal of the hemostatic material;
- positioning the distal end of the delivery tube at or near a vascular wound;
- and
- moving the pusher member distally relative to the delivery tube so that the engagement portion of the pusher member engages the delivery tube at a location proximal to at least a portion of the hemostatic material and deforms at least a portion of the delivery tube so as to create at least one opening;
- wherein after the at least one opening is formed by the pusher member deforming the delivery tube, the hemostatic material begins to be dispatched from the chamber, and the hemostatic material is dispatched from the chamber through the at least one opening.
2 more elements
An assembly for closing a vascular wound comprising:
- a hemostatic material;
- a delivery tube having a proximal end and a distal end, an inner wall of the delivery tube defining a chamber that accommodates the hemostatic material therewithin, a first portion of the chamber having a first diameter, a second portion of the chamber being proximal of the first portion and having a second diameter greater than the first diameter, and a third portion of the chamber being proximal of the second portion and having a third diameter greater than the second diameter;
- a catheter extending through the delivery tube, the chamber being defined between the catheter and the inner wall, the distal end of the delivery tube engaging the catheter so that the chamber is closed at its distal end;
- an apparatus configured to position the distal end of the delivery tube at or near a vascular wound;
- a pusher member having an engagement portion configured to fit within the third portion of the chamber, the engagement portion of the pusher member having a diameter greater than the first and second chamber portion diameters, but less than or equal to the third chamber portion diameter;
- and
- the hemostatic material being within the chamber between the first portion and the third portion, the chamber enclosing the hemostatic material therewithin, the engagement portion of the pusher member being disposed generally proximal of the hemostatic material;
- wherein the pusher member and chamber are configured so that when the pusher member is moved distally relative to the delivery tube, the hemostatic material remains enclosed within the chamber and generally distal of the pusher member engagement portion until the pusher member engagement portion engages the inner wall in the second chamber portion and deforms the delivery tube so that at least one opening is created in the chamber, and the pusher member dispatches the hemostatic material through the at least one opening created when the pusher member deforms the delivery tube.
5 more elements
Dependencies are inferred from the claim text.