Stretch resistant embolic coil delivery system with mechanical release mechanism
First Claim
1. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
- an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends;
an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter;
an embolic device having a retaining ring at the proximal end thereof;
an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring;
a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased to deflect in a direction which when it contacts said retaining ring would cause said retaining ring of said embolic device to be lifted off of said engagement member; and
,an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member and said kicker member lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member.
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Accused Products
Abstract
A medical device for placing an embolic device at a predetermined site within a vessel of the body including a delivery catheter and a flexible pusher member slidably disposed within the lumen of the catheter. An embolic device is retained within the delivery catheter by a mechanical interlocking mechanism which includes an engagement member attached to the distal end of the pusher member and extends through a retaining ring at the proximal end of the embolic device. A detachment member extends through an aperture at the distal end of the engagement member thereby locking the embolic device onto the pusher member. A kicker member extends from the distal end of the pusher member and is biased so as to lift the retaining ring off of the engagement member to ensure the release of the embolic device when the detachment member is withdrawn from the aperture of the engagement member.
146 Citations
33 Claims
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1. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
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an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device having a retaining ring at the proximal end thereof; an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased to deflect in a direction which when it contacts said retaining ring would cause said retaining ring of said embolic device to be lifted off of said engagement member; and
,an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member and said kicker member lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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9. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
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an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device having a retaining ring at the proximal end thereof; an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased toward a central axis of said pusher member; and
,an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.
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24. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
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an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device which takes the form of an embolic coil defining a central lumen extending between proximal and distal sections of the coil, a stretch resistant member having first and second ends, said first end of the stretch resistant member is attached to the distal section of the coil and the second end of the stretch resistant member is attached to a retaining ring; an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; and a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased to deflect in a direction which when it contacts said retaining ring would cause said retaining ring of said embolic device to be lifted off of said engagement member; and
,an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member and said kicker member lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
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an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device having a retaining ring at the proximal end thereof; an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased to deflect in a direction which when it contact said retaining ring would cause said retaining ring of said embolic device to be lifted off of said engagement member; and
,an elongated detachment member extending from a position proximal of the proximal end of the deployment catheter and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detached member is withdrawn from the aperture of the engagement member and said kicker member lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member. - View Dependent Claims (31, 32)
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33. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:
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an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device having a retaining ring at the proximal end thereof; an engagement member extending from the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; a kicker member which takes the form of an elongated projection extending from the distal end of the pusher member and exhibiting the characteristic of being normally biased to apply a lifting force to said retaining ring of said embolic device; and
,an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member and said kicker member lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member.
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Specification