15 results about "Self-expanding stent" patented technology

An implantable medical device comprising an elongated body having a first end, a second end, and a lumen extending therebetween, a saddle region defined between the first end and the second end, a retention member at the first end, the second end, or both, wherein the retention member extends substantially traverse to a longitudinal axis of the implantable medical device and is configured to deform responsive to an application of a force along a longitudinal axis of the implantable medical device.

The present disclosure relates generally to the field of medical devices. In particular, the present disclosure relates to devices and methods for controlled delivery of a stent, such as a self-expanding stent, and more particularly for controlling the full deployment of a stent in incremental steps from a sheath and for controlling the reconstrainment of a stent in incremental steps within a sheath.

Methods for draining pseudocysts and stent delivery systems for use therein are disclosed. An illustrative system may include a catheter shaft having an inflatable balloon affixed to a distal end region thereof. A cutting electrode may be disposed at the distal end of the system and at least one heating electrode may be disposed within the inflatable balloon. A self expandable stent may be disposed about the inflatable balloon. The stent may be formed of a shape memory polymer. The inflation fluid may be heated within the balloon to facilitate expansion of the stent.

In exemplary examples, methods and systems for treating vascular disease by implanting a stent within the vasculature and using intravascular imaging to determine and ensure that the stent was property implanted and producing a desirable and effective results is disclosed herein. For example, a system may obtain optical shape sensing data and intravascular imaging data for a blood vessel. The system may process the optical shape sensing data and the intravascular imaging data to generate a three-dimensional model and image of the blood vessel immediately before and immediately after stent implantation into the blood vessel, and perform a precise comparison of the before and after images to ensure that the stent was properly implanted and will produce or is producing a desirable and effective result. The precise comparison may be based on a derived diameter associated with the location at which the stent is placed in the blood vessel based on the generated pre and post generated three-dimensional models.

A stent delivery catheter assembly for delivering and implanting a self-expanding stent in a body lumen includes a handle assembly for one handed use. The handle assembly has a mode selection for advancing, reversing and locking the stent delivery components. Rotation of a thumbwheel allows the physician to deploy and implant the self-expanding stent in the body lumen with control and precision by simultaneously pulling a sheath proximally and pushing a pusher member distally.

The invention relates to a self-expandable stent, especially a pulmonary stent, with a proximal section, a middle section and a distal section arranged at a longitudinal axis of the stent, the stent having a dry valve made of bovine pericardium arranged at the middle section thereof, a skirt surrounding the dry valve at least at the middle section and made of one of bovine pericardium and polyester, wherein the stent further comprises eyelets arranged at a distal end at the distal section and / or a proximal end at the proximal section for fixing the stent at an artery, and wherein the stent comprises a frame composed of a plurality of arms forming the proximal, the middle and the distal section with the sections being interconnected, and the stent comprising a fixture area at the middle section of the frame with the arms being arranged in parallel to each other at the fixture area and the middle section comprising one or more fixture openings at said fixture area for fixing the valve at the frame. The invention further relates to A delivery device for delivering a self-expandable stent according to claims 1 to 14, the delivery device comprising a flush port, a main body part for holding, inflating and / or releasing the stent, and an actuation mechanism for moving the stent to a delivery site, and / or wherein the actuation mechanism has a torque control and can rotate the stent about an axis of the main body, and / or the delivery device having a knob or the like at the actuation mechanism, with the knob in particular being able to be rotated about an axis of rotation of the actuation mechanism.

A stent comprises a framework that includes a sequence of cells that each occupy a discrete segment of the stent length, and each of the cells includes a plurality of struts with ends connected at respective vertices. An adjacent pair of the cells are attached to one another by a plurality of T-bars that each include a column defining a long axis that extends parallel to the stent axis, and a top bar attached to one end of the column. An opposite end of the column is attached to a first cell, and the top bar is attached at opposite ends to a second cell of the adjacent pair of cells. The top bar includes a curved edge on an opposite side from the column, and the curved edge straddles the long axis.

The invention provides stent preparation equipment and a stent preparation method. The support preparation equipment comprises a bearing frame; the knitting tool is rotatably arranged on the bearing frame and can rotate in the first direction, and a plurality of positioning protrusions arranged according to a preset mode are arranged on the peripheral face of the knitting tool; the feeding mechanism is movably arranged on the bearing frame and comprises a feeding pipe, the feeding pipe can move in the second direction, the first direction and the second direction are parallel, the interior of the feeding pipe is used for raw material wires to pass through, and the bottom end of the feeding pipe is used for stretching into the positioning protrusions; during weaving, the raw material yarn is in a tensioned state, one end of the raw material yarn is connected with the discharging equipment, the other end of the raw material yarn penetrates through the feeding pipe and then is fixed to the weaving tool, and while the weaving tool rotates, the feeding pipe moves and pulls the raw material yarn to be attached to the outer circumferential face of the weaving tool to bypass the positioning protrusions. And then the self-expanding stent with the preset shape and size is prepared, and the consistency and stability of the stent are good.

Described herein are radially self-expanding stents. The disclosed stents can be used to widen arteries and / or veins of a patient to counteract or combat narrowing of the arteries and / or veins associated with certain congenital diseases, such as aortic coarctation. As an example, the disclosed stents are configured to be placed at or near a narrowed portion of the aorta where the stent produces a radial outward force on the aorta. The radial force produced by the stent widens the aorta and causes the stent to expand with the aorta. The disclosed stents can be crimped to relatively small sizes for placement in small patients (e.g., less than about 10 kg in size) and can be configured to expand to widen the aorta and to accommodate growth in the patient.

A stent comprises a framework that includes a sequence of cells that each occupy a discrete segment of the stent length, and each of the cells includes a plurality of struts with ends connected at respective vertices. An adjacent pair of the cells are attached to one another by a plurality of T-bars that each include a column defining a long axis that extends parallel to the stent axis, and a top bar attached to one end of the column. An opposite end of the column is attached to a first cell, and the top bar is attached at opposite ends to a second cell of the adjacent pair of cells. The column has a minimum width perpendicular to the long axis that is wider than a maximum width of each of the struts, and the column defines at least one slot. The top bar includes a curved edge on an opposite side from the column, and the curved edge straddles the long axis.

The present disclosure provides medical devices such as self-expanding stents or tissue lumen stents with an overlapping layer. The medical devices can have a coating or cover disposed over all or a portion of the medical device. The overlapping layer define a doubled back portion at an end of the medical device that includes an elongate section to provide dynamic movement of the end of the medical device relative to a central portion of the medical device.

A stent delivery system includes a delivery sheath having a distal expandable region, and an elongate shaft disposed within the sheath, the shaft including a dilation balloon at its distal end. The expandable region is configured to constrain a self-expanding stent in a collapsed configuration. The balloon is configured to shift the stent to an expanded configuration within the distal expandable region. A method of delivering a self-expanding stent includes positioning the stent delivery system at a target site, inflating the balloon within the expandable region, retracting the sheath with the balloon in an inflated configuration to move the stent out of the expandable region, and thereafter, deflating the balloon to release the stent. A stent delivery system includes a delivery sheath configured to receive a stent in a collapsed configuration, and a balloon disposed within the sheath. The balloon is configured to advance the stent out of the sheath.

An implantable medical device comprising an elongated body having a first end, a second end, and a lumen extending therebetween, a saddle region defined between the first end and the second end, a retention member at the first end, the second end, or both, wherein the retention member extends substantially traverse to a longitudinal axis of the implantable medical device and is configured to deform responsive to an application of a force along a longitudinal axis of the implantable medical device.

The invention provides a prostate self-expansion carbon coating stent system, which is a self-expansion stent and is formed by weaving a single nickel-titanium alloy wire, the surface of the wire is coated with a carbon coating, so that nickel ions are not in direct contact with human tissues; the stent is of a tubular structure and is formed by bending a wire material in a reciprocating mode to form a triangular annular unit and spirally extending the triangular annular unit. A drug coating is sprayed on the outer surface of the stent, and the drug coating comprises a drug sustained-release agent and at least one therapeutic drug; x-ray developing marks are arranged at the two ends of the bracket; the self-expansion drug-loaded stent system is applied to treatment of prostatic stenosis, a new choice except for long-term medication and traditional surgery is provided for a patient in a minimally invasive implantation mode, the stent can immediately mechanically support and expand the prostatic urethra, a urination channel is rapidly reconstructed, and therefore the problem of difficult urination is solved, and the treatment effect is good. The living quality of the patient is improved.

Self-expandable scaffold devices are disclosed. In some embodiments, the devices comprises a series of helically arranged tubes or wires connected with a distal slidable element that is axially translatable, or slidable along a tubular body to relieve expansion and compression forces. In some embodiments, the devices comprise a series of helically arranged tubes or wires that comprise a distal end region that is tapered inward toward a central axis of the tubular body.