Embolic filter delivery system and method
First Claim
1. A filter delivery system comprising:
- an elongated member having a distal end and a proximal end;
a filter having a first portion and a second portion disposed axially with respect to the elongated member and near the distal end of the member wherein a first portion of the filter is mechanically biased toward a radially expanded position and a second portion of the filter is less strongly biased toward a radially expanded position;
a restraint member having at least one axial gap, a first portion, a second portion, a restraint configuration, and a deployed configuration, wherein the first and second portion of the restraint member are disposed about the first and second portions of the filter, respectively, further wherein the first portion of the restraint member exerts a greater restraint force on the filter in the restraint configuration than the restraint force exerted on the filter by the second portion of the restraint member in the restraint configuration; and
an actuation member which interacts with the restraint member in the restraint configuration and is substantially free of interaction with the restraint member in the deployed configuration.
1 Assignment
0 Petitions
Accused Products
Abstract
The disclosure pertains to a medical device deployment system comprising a restraint member which holds the embolic protection filter in a restrained, or partially collapsed, state for insertion into a lumen and transit to a desired deployment site. The restraint member comprises two or more portions which differ in their mechanical ability to resist the radial forces exerted by various portions of the medical device when it is in a restrained, or partially collapsed, state. The restraint member is maintained in a restraint configuration by an actuation member which engages portions of the restraint member lying on opposite sides of a generally axial gap until deployment of the medical device is desired. Withdrawal of the actuation member allows the restraint member to release the medical device which may then return to a deployed state. The invention also provides a method for assembling a medical device deployment system.
300 Citations
14 Claims
-
1. A filter delivery system comprising:
-
an elongated member having a distal end and a proximal end; a filter having a first portion and a second portion disposed axially with respect to the elongated member and near the distal end of the member wherein a first portion of the filter is mechanically biased toward a radially expanded position and a second portion of the filter is less strongly biased toward a radially expanded position; a restraint member having at least one axial gap, a first portion, a second portion, a restraint configuration, and a deployed configuration, wherein the first and second portion of the restraint member are disposed about the first and second portions of the filter, respectively, further wherein the first portion of the restraint member exerts a greater restraint force on the filter in the restraint configuration than the restraint force exerted on the filter by the second portion of the restraint member in the restraint configuration; and an actuation member which interacts with the restraint member in the restraint configuration and is substantially free of interaction with the restraint member in the deployed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification