Device for capturing guide wires
A device ( 10 ) for capturing a guide wire ( 50 ) comprises a snaring device ( 20, 30 ) and an auxiliary catheter ( 40 ). The auxiliary catheter ( 40 ) is configured to slidingly accommodate the guide wire to be caught so as to extend a distal end ( 47 ) thereof beyond the distal end of the guide wire in order to be caught by the snaring device ( 20, 30 ) while the guide wire ( 50 ) is in a retracted position in the auxiliary catheter ( 40 ). The auxiliary catheter preferably comprises a portion which is at least partially echo-transparent and/or radio-transparent and an end portion ( 44 ) which is radio-opaque and/or echo-opaque.
1 . A device for capturing a guide wire having a distal end, the device comprising:
a snaring device; and
an auxiliary catheter having a distal end and an end hole, the auxiliary catheter being configured to slidingly accommodate the guide wire to be caught so as to extend the distal end of the auxiliary catheter beyond the distal end of the guide wire in order to be caught by the sharing device while the guide wire is in a retracted position in the auxiliary catheter, wherein the auxiliary catheter is at least partially echo-transparent and/or radio-transparent over at least a portion thereof and includes a radio-opaque and/or echo-opaque portion near the end hole.
2 . The device according to claim 1 , wherein the at least partially echo-transparent and/or radio-transparent portion of the auxiliary catheter is predominant.
3 . The device according to claim 1 , wherein the sharing device includes a first catheter and the radio-opaque and/or echo-opaque portion has a length sufficient for display in a folded form during introduction of the auxiliary catheter into the first catheter of the snaring device.
4 . The device according to claim 1 , wherein the sharing device comprises a snaring member and a rod, the snaring member comprising at least one loop mounted on the rod.
5 . The device according to claim 1 , wherein the auxiliary catheter has an internal diameter configured to allow insertion and sliding of a single guide wire.
6 . The device according to claim 1 , wherein the auxiliary catheter is constructed from polymer material.
7 . A method for capturing a guide wire, comprising the steps of:
providing the device for capturing the guide wire having the distal end according to claim 1 ;
positioning the guide wire in a desired position;
positioning the snaring device so that the distal end of the guide wire engages with the sharing device or crosses the sharing device;
arranging the auxiliary catheter over the guide wire;
sliding the auxiliary catheter along the guide wire so that the auxiliary catheter crosses or engages with the sharing device;
withdrawing the guide wire such that an end thereof does not cross or engage with the sharing device; and
withdrawing a snaring member of the snaring device inside a catheter, thereby capturing the auxiliary catheter.
8 . The method according to claim 7 , further including folding the at least partially echo-transparent and/or radio-transparent portion of the auxiliary catheter when the sharing member captures the auxiliary catheter, thereby indicating visually, by echographic and/or radiographic images, the correct capture of the auxiliary catheter by the snaring device.