Small diameter snare
First Claim
1. A surgical snare device for ensnaring objects in the vascular system, the snare including:
- A. a core wire with a proximal end and a distal end;
B. tubing that extends over the core wire, the tubing including a metal section, the tubing having an outer diameter sized and arranged to allow the tubing to fit through a guiding or balloon catheter that is inserted into a blood vessel;
C. a loop with a distal end and a proximal end, the loop including two snare wires that each attach at a respective distal end to one another and that each attach at a respective proximal end to the core wire;
D. a first radiopaque marker that attaches to the distal end of the loop; and
E. a handle that attaches to the proximal end of the core wire, the handle being pushed in the direction of the distal end of the device to push the loop out of a distal end of the tubing and being pulled in the opposite direction to pull all or a portion of the loop into the distal end of the tubing, and wherein each of the snare wires is constructed and arranged to spring away from one another to define the loop when each of the snare wires are pushed out of the distal end of the tubing and the snare wires are constructed and arranged to move toward each other as the snare wires are moved into the distal end of the tubing.
8 Assignments
0 Petitions
Accused Products
Abstract
A small-diameter surgical snare device that is capable of fitting through existing balloon or guiding catheters includes metal tubing along a section of a core wire. The distal end of the core wire connects to one or more snare wires that form the snaring loop. The distal end of the snaring loop supports a radiopaque coil or collar that makes the end of the loop visible under fluoroscopy. The snaring loop may consist of one or two wires or an overlap of a tapered end of the core wire. A radiopaque coil is attached to a distal end of the metal tubing, to provide flexibility and visibility to a distal region of the device. Alternatively, a polyimide tube and a short radiopaque marker may be included at a distal end of the metal tubing. The polyimide tube fits inside of the metal tubing, to add strength and torsion control to the distal region of the device, while the radiopaque marker adds visibility. In all embodiments, a shrink tube is fit over the radiopaque coil or marker that is supported by the distal end of the metal tubing, to ensure that the coil does not stretch when the snaring loop is extended during use.
77 Citations
30 Claims
-
1. A surgical snare device for ensnaring objects in the vascular system, the snare including:
-
A. a core wire with a proximal end and a distal end;
B. tubing that extends over the core wire, the tubing including a metal section, the tubing having an outer diameter sized and arranged to allow the tubing to fit through a guiding or balloon catheter that is inserted into a blood vessel;
C. a loop with a distal end and a proximal end, the loop including two snare wires that each attach at a respective distal end to one another and that each attach at a respective proximal end to the core wire;
D. a first radiopaque marker that attaches to the distal end of the loop; and
E. a handle that attaches to the proximal end of the core wire, the handle being pushed in the direction of the distal end of the device to push the loop out of a distal end of the tubing and being pulled in the opposite direction to pull all or a portion of the loop into the distal end of the tubing, and wherein each of the snare wires is constructed and arranged to spring away from one another to define the loop when each of the snare wires are pushed out of the distal end of the tubing and the snare wires are constructed and arranged to move toward each other as the snare wires are moved into the distal end of the tubing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A surgical snare device for ensnaring objects in the vascular system, the snare including:
-
A. a core wire with a proximal end and a distal end;
B. tubing that extends over the core wire, the tubing including a metal outer section and a polymer inner section, the inner section being positioned at a distal end of the tubing, and the tubing having an outer diameter sized and arranged to allow the tubing to fit through a guiding or balloon catheter that is inserted into a blood vessel;
C. a loop with a distal end and a proximal end, the loop including two snare wires that each attach at a respective distal end to one another and that each attach at a respective proximal end to the core wire;
D. a radiopaque marker that attaches to the distal end of the loop; and
E. a handle that attaches to the proximal end of the core wire, the handle being pushed in the direction of the distal end of the device to push the loop out of a distal end of the tubing and being pulled in an opposite direction to pull all or a portion of the loop into the distal end of the tubing, and wherein each of the snare wires is constructed and arranged to spring away from one another to define the loop when each of the snare wires are pushed out of the distal end of the tubing and the snare wires are constructed and arranged to move toward each other as the snare wires are moved into the distal end of the tubing. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification