Scimed Life Systems, Inc.

Boston Scientific Scimed, Inc.

Lance A Monroe

Anthony Ciro Vrba

Scott Raymond Smith

David John Sogard

Andrew D Bicek

Joel R Munsinger

Steven E Walak

Dave J Sogard

Joel Phillips

Lixiao Wang

John Jianhua Chen

Dachuan Yang

Yiqun Wang

Yiqun Bruce Wang

A medical device delivery system, having a rolling retractable sheath covering a medical device mounting region on the system is disclosed. The rolling retractable sheath comprises an inner wall and an outer wall and may be formed of one or more materials, optionally porous. Optionally, a lubricant may be applied selectively to the interior and exterior walls of the stent.

Rolling membrane stent delivery system

Methods for making a loaded catheter assembly for delivering a self-expanding stent where the self-expanding stent is carried in a compressed state and the compressed stent has an inside diameter smaller than the outside diameter of the catheter distal tip. The methods can utilize catheter sub-assemblies lacking already attached tips or having partially formed distal tips. A stent can be proximally and co-axially slid over the distal end of the catheter shaft and constrained by a retractable sheath disposed co-axially about the compressed stent. The catheter distal tip can be added or more fully formed after the loading of the stent. Some catheters include a preformed distal conical tip held in position by a heat-shrink film. Other catheters have an elastomeric distal tip waist for slipping over and engaging an outward projection on the catheter shaft distal region. Some catheters are adapted to engage catheter shaft distal threaded regions.

Catheter tip designs and method of manufacture

The inventive stent delivery system includes a catheter having a retractable outer sheath near its distal end. A shape memory contraction member having a memorized contracted shape is connected to the retractable outer sheath. A heat generating device connected to the shape memory contraction member causes the shape memory contraction member to heat up to its transition temperature and assume its contracted position, retracting the retractable outer sheath. Another embodiment utilizes 2 springs, a &ldquo;normal&rdquo; spring and a shape memory alloy (SMA) spring, the two springs selected and designed so that the &ldquo;normal&rdquo; has an expansion force which is less than SMA spring when the SMA spring is austenitic, but greater than the SMA spring when the SMA spring is martensitic. Yet another embodiment utilizes a shape memory latch which in its martensitic state abuts a stop to prevent a spring from moving the sheath proximally, but in its austenitic state releases the stop, allowing the spring to retract the sheath to release the stent for deployment.

Stent delivery system using shape memory retraction

The present invention relates to a medical device comprising at least one tubular member having an inner surface and an outer surface. The inner surface of the tubular member is at least occasionally subjected to contact with at least one second surface. The tubular member therefore comprises a hydrophilic lubricious coating disposed on its inner surface to reduce the friction between the inner surface of the tubular member and the second surface which is caused by movement.

Hydrophilic lubricant coatings for medical devices

Pulling membrane stent delivery system

A stent delivery system having a hydraulically actuated retractable sheath is disclosed. A pressurizing fluid is either supplied by an inflation lumen to a portion of a piston housing or is withdrawn from a portion of a piston housing, thereby actuating a piston. As the piston moves, a retractable sheath which is connected to the piston moves as well causing the sheath to retract.

Stent delivery device

Growing community of inventors

New Hope, MN, United States of America

Lance A Monroe