Foreign body retrieval device
First Claim
1. A retrieval device comprising:
- first catheter having a distal end, a proximal end, a lumen system configured to accept at least one wire such that the at least one wire may extend beyond either end of the first catheter, and an opening system through which a loop may be formed, the opening system positioned between the distal end and the proximal end, the lumen system having an opening separate from the opening system, the opening of the lumen system configured to accept the at least one wire such that the at least one wire may extend beyond the distal end of the first catheter; and
a wire having a distal end attached to the first catheter, and a proximal end;
wherein the proximal end of the wire may be manipulated to cause a portion of the wire to form a loop external of the first catheter, the loop being capable of grasping foreign bodies within a patient.
1 Assignment
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Accused Products
Abstract
A retrieval device or snare for grasping foreign articles and retrieving them from the body of a patient. The retrieval device includes a catheter open at both ends such that it may be advanced along a guidewire. The distal end of a wire is attached to the first catheter near an opening system within the catheter. The opening system may be a slot or a pair of holes. A portion of the wire is oriented external of the catheter. Manipulation of the proximal end of the wire causes a portion of the wire to form a loop external of the catheter. The catheter may be tapered, as may be the wire. A reinforcing- material may be attached to the portion of the wire that forms the loop. Another reinforcing material may also be attached to the proximal portion of the wire in order to stiffen the wire and improve its pushability. A guidewire may be inserted into a patient and maneuvered to an appropriate location within the patient, the catheter may be advanced over the guidewire, the wire attached to the catheter may be manipulated to capture a foreign body with the loop, and the catheter and foreign body may be withdrawn from the patient.
342 Citations
47 Claims
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1. A retrieval device comprising:
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first catheter having a distal end, a proximal end, a lumen system configured to accept at least one wire such that the at least one wire may extend beyond either end of the first catheter, and an opening system through which a loop may be formed, the opening system positioned between the distal end and the proximal end, the lumen system having an opening separate from the opening system, the opening of the lumen system configured to accept the at least one wire such that the at least one wire may extend beyond the distal end of the first catheter; and
a wire having a distal end attached to the first catheter, and a proximal end;
wherein the proximal end of the wire may be manipulated to cause a portion of the wire to form a loop external of the first catheter, the loop being capable of grasping foreign bodies within a patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A retrieval device comprising:
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a first catheter having a distal end, a proximal end, a lumen system configured to accept at least one wire such that the at least one wire may extend beyond either end of the first catheter, and an opening system through which a loop may be formed;
a first wire configured to be placed within the lumen system and extend beyond either end of the first catheter; and
a second wire having a distal end and a proximal end, the distal end of the second wire being attached to the first catheter;
wherein the proximal end of the second wire may be manipulated to cause a portion of the second wire to pass through the opening system and form a loop capable of grasping foreign bodies within a patient. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for retrieving a foreign body from a patient, comprising:
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inserting a guidewire into the patient;
maneuvering the guidewire to an appropriate location within the patient;
advancing a first catheter over the guidewire, the first catheter having a distal end, a proximal end, an opening system through which a loop may be formed, and a wire attached thereto, the wire being capable of forming a loop;
manipulating the wire to capture the foreign body with the loop; and
withdrawing the first catheter and foreign body to retrieve the foreign body from the patient. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. A retrieval device comprising:
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a first catheter having a distal end, a proximal end, an opening system through which a loop may be formed, the opening system positioned between the distal end and the proximal end, and a lumen system configured to accept at least (a) a guidewire such that the guidewire may extend beyond either end of the first catheter, and (b) a wire suited to forming the loop, the lumen system having an opening separate from the opening system, the opening of the lumen system configured to accept the guidewire such that the guidewire may extend beyond the distal end of the first catheter; and
a wire having a distal end attached to the first catheter, and a proximal end;
wherein the proximal end of the wire may be manipulated to cause a portion of the wire to form a loop external of the first catheter, the loop being capable of grasping foreign bodies within a patient.
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Specification