Guidewire extension with self-latching detachable connector
First Claim
Patent Images
1. A guidewire for use with a catheter and an extension for the guidewire for enabling multiple catheter exchanges comprising:
- a guidewire having a proximal end and a distal end;
an extension wire having a proximal end and a distal end;
cooperative self-latching connector means on the proximal end of the guidewire and the distal end of the extension wire for detachably connecting the guidewire and extension wire, said connector means being so constructed and arranged as to be reconnectible after detachment, the connector means being adapted to effect a non-frictional mechanical interlock between the connectible elements thereof;
the connector means being constructed to effect said mechanical interlock without permanent deformation of either of the proximal end of the guidewire or the distal end of the extension wire;
the connector means being an axially telescoping construction in which the guidewire is provided with a socket at its proximal end and the extension wire has a self-latching latch member at its distal end, the self-latching latch member being received within the socket;
the latch member comprising a helical coil having a proximal end and a distal end and being attached at its distal end to the region of the distal end of the extension wire, the proximal end of the helical coil being free to enable the helical coil to stretch axially and constrict radially about the distal end of the extension wire.
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Abstract
A guidewire system for use in catheter exchanges avoids the need for a separate exchange wire by connecting an extension wire to the proximal end of the guidewire thereby increasing the effective length of the guidewire to permit a catheter exchange. The proximal end of the guidewire is attached to the distal end of the exchange wire by a disconnectable reattachable connection which avoids deformation of the connected joint.
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Citations
16 Claims
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1. A guidewire for use with a catheter and an extension for the guidewire for enabling multiple catheter exchanges comprising:
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a guidewire having a proximal end and a distal end; an extension wire having a proximal end and a distal end; cooperative self-latching connector means on the proximal end of the guidewire and the distal end of the extension wire for detachably connecting the guidewire and extension wire, said connector means being so constructed and arranged as to be reconnectible after detachment, the connector means being adapted to effect a non-frictional mechanical interlock between the connectible elements thereof; the connector means being constructed to effect said mechanical interlock without permanent deformation of either of the proximal end of the guidewire or the distal end of the extension wire; the connector means being an axially telescoping construction in which the guidewire is provided with a socket at its proximal end and the extension wire has a self-latching latch member at its distal end, the self-latching latch member being received within the socket; the latch member comprising a helical coil having a proximal end and a distal end and being attached at its distal end to the region of the distal end of the extension wire, the proximal end of the helical coil being free to enable the helical coil to stretch axially and constrict radially about the distal end of the extension wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A guidewire for use with a catheter and an extension for the guidewire for enabling multiple catheter exchanges comprising:
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a guidewire having a proximal end and a distal end an extension wire having a proximal end and a distal end; cooperative self-latching connector elements on the proximal end of the guidewire and the distal end of the extension wire for detachably connecting the guidewire and extension wire, said connector elements being so constructed and arranged as to be reconnectible after detachment, the connector elements being adapted to effect a non-frictional mechanical interlock between the connectible elements thereof; wherein the separation of the connected guidewire and extension requires simultaneous rotation and axial separation of the connected elements. - View Dependent Claims (15, 16)
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Specification