Retrieval systems and methods for use thereof
AssigneeCovidien LP
InventorsBrian B. Martin, Martin S. Dieck
Life of this patent
Estimating the term…
Abstract
The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen.
Claims21
A device for placement through a catheter to retrieve an obstruction within a blood vessel, the device comprising:
- a shaft having a distal end and a proximal end;
- and
- an eversible cover having a fixed section connected to the shaft at a location proximal to the distal end of the shaft, and a free section extending in a proximal direction from the fixed section,
- the eversible cover being (i) expandable when advanced to the obstruction and deployed from the catheter, and (ii) axially compliant, such that proximal movement of the fixed section causes the free section to evert over the fixed section,
- wherein the eversible cover includes a distal region defining a distal recess, the fixed section of the eversible cover is located within the distal recess, the distal end of the shaft extends distally outward from the distal recess and the free section is spaced apart from the shaft.
A device for placement using a catheter to retrieve an obstruction within a blood vessel, the device comprising:
- a shaft with an eversible cover having an end fixed to the shaft and a free section moveable relative to the shaft,
- wherein the free section of the eversible cover is expandable when deployed from the catheter,
- wherein the free section is configured to evert over the end fixed to the shaft when the shaft is translated proximally, and
- wherein the eversible cover forms a distal recess, the end fixed to the shaft is located within the distal recess, the shaft includes a distal portion extending out of the distal recess, and the free section is spaced apart from the shaft.
A system to retrieve an obstruction from a site within a blood vessel, the system comprising:
- a catheter configured to be advanced to the site of the obstruction;
- and
- a shaft including an eversible cover having an end fixed to the shaft and a free section moveable relative to the shaft,
- wherein the free section of the eversible cover is expandable when deployed from the catheter,
- wherein the free section is configured to evert over the end fixed to the shaft when the shaft is translated proximally, and
- wherein the eversible cover includes a distal opening, the end fixed to the shaft is positioned within the distal opening, the shaft extends distally out of the distal opening, and the free section is spaced apart from the shaft.
Dependencies are inferred from the claim text.