Detachable embolic coil assembly using interlocking clasps and method of use
First Claim
1. 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 a first clasp means having an axis and an axial passageway generally colinear collinear with the coil, the axial passageway and the interlocking first clasp means shaped to interlock with similar shaped a second clasp means having a second axis and a second axial passageway by passing a control wire through the first and second axial passageway passageways and to uncouple from said similar shaped clasp means the second clasp by axially withdrawing the control wire from the shaped clasp means second clasp, where the first clasp comprises a middle portion shaped to accommodate a distal portion of the second clasp.
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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.
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Citations
28 Claims
- 1. 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 a first clasp means having an axis and an axial passageway generally colinear collinear with the coil, the axial passageway and the interlocking first clasp means shaped to interlock with similar shaped a second clasp means having a second axis and a second axial passageway by passing a control wire through the first and second axial passageway passageways and to uncouple from said similar shaped clasp means the second clasp by axially withdrawing the control wire from the shaped clasp means second clasp, where the first clasp comprises a middle portion shaped to accommodate a distal portion of the second clasp.
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10. A combination pusher assembly-coil assembly for use in occluding a selected vascular site within a vessel comprising:
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(a) a coil with two ends 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 on a first end a first clasp;
(b) a pusher assembly comprising having a distal end comprising a second clasp at the distal end, and where a second end of the coil has a third clasp, and where each of the first and second clasps has an axis and an axial passageway generally colinear with the coil, the first clasp being shaped to interlock with the second clasp by passing a control wire through the first and second axial passageways and to uncouple from the second clasp by axially withdrawing the control wire from the second clasp;
where the first, second and third clasps each comprises a distal portion and a middle area shaped to accommodate the distal portion of each of the other clasps, and where the distal portion and middle area of each of the first, second and third clasps are shaped such that any of the first, second and third clasps can be coupled to any of the other clasps; and
where the pusher assembly comprises a tubular pusher sheath having which has a proximal end and a distal end and , the pusher assembly adapted to fit within a catheter sheath and , the pusher assembly 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 . - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A process for the placement of embolic coils at a selected vascular site comprising the steps of:
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a) introducing to a selected site an embolic coil having, on at least one end of said the coil, an interlocking shaped a first clasp means and having an axis and an axial passageway generally colinear with the coil and an axial passageway through the coil , the axial passageway and the interlocking first clasp means to interlock with similar shaped clasp means interlocked with a second clasp by passing a control wire passing through the axial passageway and to uncouple uncoupleable from said similar shaped the second clasp means by withdrawing a the control wire from the shaped first clasp means , where the first clasp comprises a middle portion shaped to accommodate a distal portion of the second clasp and the second clasp comprises a middle portion shaped to accommodate a distal portion of the first clasp; and
b) withdrawing the control wire from the shaped first clasp means . - View Dependent Claims (19, 20, 21)
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- 22. A detachable coil assembly for use in occluding a selected site within a vessel comprising a detachable coil having, on at least one end, a first clasp having an axis generally collinear with the detachable coil, the first clasp being shaped to interlock with a second clasp similar to the first clasp when the clasps overlap within a sheath, where the first clasp is a unitary piece that comprises a generally cylindrical distal portion having a flat surface configured to mesh within and abut with a flat surface in a middle portion of the second clasp, an integral middle portion shaped to accommodate a distal portion of the second clasp, and a proximal portion having a circular cross-sectional area that is larger than a non-circular cross sectional area of the first clasp middle portion, said distal portion of the second clasp having a flat surface configured to mesh within and abut with a flat surface in the middle portion of the first clasp.
- 25. A detachable coil assembly for use in occluding a selected site within a vessel comprising a coil having, on at least one end, a first clasp with an axis and an axial passageway generally colinear with the coil, the assembly further comprising a second clasp, the first clasp being shaped to interlock with the second clasp when a control wire is passed through the axial passageway and to uncouple from the second clasp by axially withdrawing the control wire from the first clasp.
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28. A detachable coil assembly for use in occluding a selected site within a vessel comprising a first coil having on an end thereof a first clasp, and a second coil having on an end thereof a second clasp shaped to interlock with the first clasp, where the first clasp has an axis and an axial passageway and is adapted to interlock with the second clasp by passing a control wire through the axial passageway and a second axial passageway in said second clasp and to uncouple by axially withdrawing the control wire from at least the second axial passageway.
Specification