System and methods for compressing endovascular devices
Inventors
MITHA, ALIM P. • Jamshidi, Mehdi
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-11504254-B2
Publication Date
2022-11-22
Expiration Date
Abstract
This disclosure relates to systems and methods for compressing reversibly compressible endovascular devices for loading into delivery catheters prior to deployment in lumen of a vessel.
Core Innovation
A radial compression system compresses a reversibly compressible endovascular device into a compressed position prior to deployment. The endovascular device comprises a tubular body expandable between a compressed position and a non-compressed position, and a delivery sheath is sized to receive and maintain the endovascular device in the compressed position through a delivery sheath opening sized to receive the endovascular device in a compressed form.
Compression is performed by a collapsible compressor having a generally tapered structure that defines an interior space with distal and proximal compressor ends. The proximal compressor end is proximal to the delivery sheath opening, the distal compressor end includes a distal compressor opening sized to receive the endovascular device in the non-compressed position, and the interior surface frictionally engages the outer surface of the endovascular device.
A hollow compressor tube attached to the compressor is disposed within the delivery sheath and is advanced proximally to urge the frictionally engaged compressor and endovascular device through the delivery sheath opening, collapsing the compressor upon reception within the delivery sheath. Collapse exerts a radial force sufficient to compress the endovascular device into the compressed position for reception in the delivery sheath, and a push wire with a bump member advances distally relative to the tapered structure to contact the proximal end of the endovascular device and apply a distal force so the endovascular device is disengaged from the compressor.
Claims Coverage
The independent claim covers a complete system architecture for radial compression of a reversibly compressible endovascular device prior to deployment, comprising the endovascular device, a delivery sheath, a collapsible generally tapered compressor frictionally engaged with the endovascular device, a hollow compressor tube to collapse the compressor, and a push wire with a bump member configured for distal-only disengagement.
Radial compression of a reversibly compressible endovascular device prior to deployment using a delivery sheath
A system including the endovascular device with an expandable tubular body and a delivery sheath sized to receive and maintain the endovascular device in a compressed position through a delivery sheath opening sized to receive the endovascular device in a compressed form.
Collapsible generally tapered compressor with frictional engagement to collapse and compress the endovascular device
A collapsible compressor comprising a generally tapered structure defining an interior space with distal and proximal compressor ends, a distal compressor opening sized to receive the endovascular device in the non-compressed position, tapering such that the cross section of the interior space diminishes toward the proximal compressor end to an area equal to or less than the delivery sheath opening area, and an interior surface frictionally engaged with the outer surface of the endovascular device.
Hollow compressor tube advanced proximally to collapse the compressor within the delivery sheath
A hollow compressor tube attached to the compressor and disposed within the delivery sheath, operable to be advanced proximally through the delivery sheath to urge the compressor and the endovascular device frictionally engaged therein through the delivery sheath opening to collapse the compressor, wherein collapse exerts a radial force sufficient to compress the endovascular device into the compressed position for reception in the delivery sheath.
Independently advanced push wire with bump member for distal-only disengagement
A push wire disposed within the hollow compressor tube and operable to be advanced through the delivery sheath independently of the hollow compressor tube, with a bump member configured to advance distally relative to the tapered structure to contact the proximal end of the endovascular device and apply a distal force only in a distal direction so the endovascular device is disengaged from the compressor.
Overall claim coverage is directed to collapsing a reversibly compressible endovascular device into a compressed position for reception in a delivery sheath using a generally tapered, collapsible, friction-engaging compressor advanced through the delivery sheath by a hollow compressor tube, while using an independently advanced push wire bump member to disengage the endovascular device from the compressor by applying a distal force at the proximal end only in a distal direction.
Stated Advantages
Allows radial compression of a reversibly compressible endovascular device into a compressed position prior to deployment for reception in a delivery sheath.
Bump member configured to disengage the endovascular device from the compressor by applying a distal force at the proximal end without being required to be engaged during compression.
Documented Applications
A system for radial compression of a reversibly compressible endovascular device inside a delivery sheath prior to deployment, including deployment concepts using a delivery catheter and hub registration in connection with a push wire advancing the device to a distal opening.
Interested in licensing this patent?