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US 2021/0275334 A1Published application
System & methods for compressing endovascular devices
AssigneeFluid Biotech Inc.
InventorsAlim P. MITHA, MEHDI JAMSHIDI
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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.
Claims43
A system for the radial compression of a reversibly compressible endovascular device (ED) prior to deployment, the system comprising:
- the ED, wherein the ED comprises a tubular body, wherein the body is expandable between a compressed position and an non-compressed position, the tubular body having an inner surface, an outer surface, opposed distal and proximal ED ends, and opposed distal and proximal ED openings;
- a delivery sheath sized to receive and maintain the ED in the compressed position, the delivery sheath having a delivery sheath opening having a diameter sized to receive the ED into the delivery sheath in a compressed form;
- a collapsible compressor for compressing the ED for reception by the delivery sheath through the delivery sheath opening, wherein the compressor comprises:
- a generally tapered structure defining an interior space, the tapered structure comprising distal and proximal compressor ends, wherein the proximal compressor end is proximal to the delivery sheath opening, wherein the distal compressor end comprises a distal compressor opening sized to receive the ED in the non-compressed position, wherein the tapered structure tapers from the distal compressor opening toward the proximal compressor end such that the cross section of the interior space diminishes toward the proximal compressor end, wherein the cross sectional area of the interior space at the proximal compressor end is equal to or less than the cross sectional area of the delivery sheath opening, and wherein an interior surface of the tapered structure is frictionally engaged with the outer surface of the ED;
- and
- a hollow compressor tube attached to the compressor and disposed within the delivery sheath, wherein the hollow compressor tube is operable to be advanced proximally through the delivery sheath to urge the compressor and the ED frictionally engaged therein through the delivery sheath opening to collapse the compressor, wherein collapse of the compressor upon reception within the delivery sheath exerts a radial force upon the ED sufficient to compress the ED into the compressed position for reception in the delivery sheath;
- and
- a push wire disposed within the hollow compressor tube and operable to be advanced through the delivery sheath independently of the hollow compressor tube, wherein the push wire has a bump member disposed thereon proximal to the proximal ED end, and wherein the bump member is configured to abut the ED on the proximal ED end.
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A method of loading a reversibly compressible endovascular device (ED) into a delivery sheath having an interior width less than the radial width of the ED in an unexpanded position, the method comprising:
- compressing the ED from an expanded position to an unexpanded position for reception in the delivery sheath, wherein compressing comprises urging the ED in the expanded position through an interior space of a compressor, wherein the compressor comprises a tapered structure tapered from a distal compressor end toward a proximal compressor end of the tapered structure, wherein the width of the interior space at the distal compressor end is greater than the diameter of the ED in the expanded position and the width of the interior space at the proximal compressor end is less than the diameter of the ED in the expanded position, to radially compress the ED to an unexpanded position;
- urging the ED in the unexpanded position through a proximal compressor opening at the proximal compressor end and into the delivery sheath through a delivery sheath opening.
A system for the radial compression of a reversibly compressible endovascular device (ED) prior to deployment, the system comprising:
- the ED, wherein the ED comprises a tubular body, wherein the body is self-expandable between a compressed position and a non-compressed position, the tubular body having an inner surface, an outer surface, opposed distal and proximal ED ends, and opposed distal and proximal ED openings;
- a delivery catheter sized to receive and maintain the ED in the compressed position, the delivery catheter having proximal and distal delivery catheter ends, and a distal delivery catheter opening at the distal delivery catheter end, wherein the distal delivery catheter opening has a diameter sized to receive the ED into the delivery catheter in a compressed form;
- a collapsible compressor for compressing the ED for reception by the delivery catheter through the distal delivery catheter opening, wherein the compressor comprises:
- a generally tapered structure defining an interior space, the tapered structure comprising distal and proximal compressor ends, wherein the proximal compressor end is proximal to the distal delivery catheter opening, wherein the distal compressor end comprises a distal compressor opening sized to receive the ED in the non-compressed position, wherein the tapered structure tapers from the distal compressor end toward the proximal compressor end such that the cross section of the interior space diminishes toward the proximal compressor end, wherein the cross sectional area of the interior space at the proximal compressor end is equal to or less than the cross sectional area of the distal delivery catheter opening, and wherein an interior surface of the tapered structure is frictionally engaged with the outer surface of the ED;
- and
- a hollow compressor tube attached to the compressor and disposed within the delivery catheter, wherein the hollow compressor tube is operable to be advanced proximally through the delivery catheter toward the proximal delivery catheter end to urge the compressor and the ED frictionally engaged therein through the distal delivery catheter opening, wherein collapse of the compressor upon reception within the delivery catheter exerts a radial force upon the ED sufficient to compress the ED into the compressed position for reception in the delivery catheter;
- and
- a push wire disposed within the hollow compressor tube and operable to be advanced through the delivery catheter independently of the hollow compressor tube, wherein the push wire has a bump member disposed thereon proximal to the proximal ED end, wherein the bump member is configured to abut the ED on the proximal ED end.
5 more elements
Dependencies are inferred from the claim text.