Detachable embolic coil assembly using interlocking clasps and method of use
AssigneeTarget Therapeutics, Inc.
InventorThomas J. Palermo
Life of this patent
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Abstract
This invention is a surgical instrument and specifically is a device for delivering an embolic coil to a selected site within the vasculature of a human body via use of a catheter. In particular, the device uses embolic coils having interlocking clasps on the coils which are secured to each other by a control wire within the catheter. Retraction of the control wire into the catheter body uncouples the distal coil.
Claims21
A detachable coil assembly for use in occluding a selected vascular site within a vessel comprising a coil having, on at least one end, an interlocking shaped clasp means having an axis and an axial passageway generally colinear with the coil, the axial passageway and the interlocking clasp means to interlock with similar shaped clasp means by passing a control wire through the axial passageway and to uncouple from said similar shaped clasp means by axially withdrawing the control wire from the shaped clasp means.
A combination pusher assembly-coil assembly for use in occluding a selected vascular site within a vessel comprising:
- (a) a coil having, on at least one end, an interlocking shaped clasp means having an axis and an axial passageway generally colinear with the coil, the axial passageway and the interlocking shaped clasp means to interlock with a similar shaped clasp means by passing a control wire through the axial passageway and to uncouple from said similar shaped clasp means by axially withdrawing the control wire from the similar clasp means;
- (b) a pusher assembly comprising a tubular pusher sheath having a proximal end and a distal end and adapted to fit within a catheter sheath and having a continuous passageway therethrough for passage of a control wire from the distal end of the pusher sheath to the proximal end of the pusher sheath, and an interlocking shaped clasp means located at the distal end of the pusher sheath and said shaped clasp means connected to the distal end of the pusher assembly;
- and
- (c) a control wire suitable for passage through the pusher passageway and the coil axial passageway.
A process for the placement of embolic coils at a selected vascular site comprising the steps of:
- a) introducing to a selected site an embolic coil having, on at least one end of said coil, an interlocking shaped clasp means and having an axis generally colinear with the coil and an axial passageway through the coil, the axial passageway and the interlocking clasp means to interlock with similar shaped clasp means by passing a control wire through the axial passageway and to uncouple from said similar shaped clasp means by withdrawing a control wire from the shaped clasp means, and
- b) withdrawing the control wire from the shaped clasp means.
Dependencies are inferred from the claim text.