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 tubular 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 tongue formed integrally from the wall of the tubular pusher member as a distal projection and having an aperture through the distal end thereof and exhibits the characteristic of being normally biased parallel to the central axis of the lumen of the pusher member and is deflected in a direction toward the central axis for engagement with said retaining ring of said embolic device so that it contacts said retaining ring to thereby urge 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 and through the aperture of the kicker tongue such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member and said kicker tongue, and said kicker tongue lifts said retaining ring on said embolic device off of said engagement member to thereby release the embolic device from said pusher member.
2 Assignments
0 Petitions
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 tongue which is formed as an extension of a portion of the wall of the pusher member extends distally 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.
178 Citations
22 Claims
-
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 tubular 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 tongue formed integrally from the wall of the tubular pusher member as a distal projection and having an aperture through the distal end thereof and exhibits the characteristic of being normally biased parallel to the central axis of the lumen of the pusher member and is deflected in a direction toward the central axis for engagement with said retaining ring of said embolic device so that it contacts said retaining ring to thereby urge 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 and through the aperture of the kicker tongue 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 tongue, and said kicker tongue 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, 9, 10, 11, 12, 13, 14)
-
-
15. 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 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 tongue is formed as an extension of a portion of the wall of the pusher member and having an aperture through the distal end thereof and extends distally and exhibits the characteristic of being normally biased parallel to a central axis of said pusher member, said kicker tongue engaging said retaining ring of said embolic device to thereby urge 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 and through the aperture of said kicker tongue 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 tongue to thereby release the embolic device. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
-
Specification