6 results about "Stent insertion" patented technology

This invention discloses a precisely positioned and displacement-resistant stent for use at the junction of cavities, comprising a support stent and a positioning frame. The support stent supports the diseased junctional lumen; the positioning frame includes multiple positioning strips made of shape-memory metal. These positioning strips are linear when confined by the delivery sheath and coiled when released. The outer edge of the coiled structure includes a first part, a second part, and a third part connected sequentially. The first part forms a bent structure with the support stent and abuts against the junctional lumen wall. The second part is an arc-shaped portion with its opening facing the longitudinal axis of the support stent, thus opening the junctional lumen wall. Through the cooperation of the positioning strips and the support stent, precise positioning of the support stent at the junction is achieved. Simultaneously, the positioning strips have a small overall curvature and short longitudinal length, avoiding interference with other junctional cavities, making it particularly suitable for left common iliac vein stents, effectively preventing problems caused by excessive stent insertion or displacement.

To provide a stent capable of smoothly inserting a guide wire into the stent indwelled in the body.SOLUTION: The stent delivery system 50 includes the stent 1, an inner catheter 51, an outer catheter 52, and an operation unit 53, and the guide wire W passes through the stent delivery system 50. The stent 1 includes a stent tube wall portion 2 having an annular shape, a hollow stent insertion portion 3 surrounded by the stent tube wall portion 2 and penetrating the stent 1, and a flap portion 4 formed to protrude from a side surface of the stent tube wall portion 2. A notch part 11 having at least one or more notches 10 is provided on the rear end side of the stent 1. When the stent 1 is removed, the guide wire W can be easily inserted into the stent insertion portion 3 by inserting the distal end of the guide wire W into the notch 10.SELECTED DRAWING: Figure 2

A device and method for intravascular treatment of atherosclerotic plaque prior to balloon angioplasty which microperforates the plaque with small sharp spikes acting as serrations for forming cleavage lines or planes in the plaque. The spikes may also be used to transport medication into the plaque. The plaque preparation treatment enables subsequent angioplasty to be performed at low balloon pressures of about 4 atmospheres or less, reduces dissections, and avoids injury to the arterial wall. The subsequent angioplasty may be performed with a drug-eluting balloon (DEB) or drug-coated balloon (DCB). The pre-angioplasty perforation procedure enables more drug to be absorbed during DEB or DCB angioplasty, and makes the need for a stent less likely. Alternatively, any local incidence of plaque dissection after balloon angioplasty may be treated by applying a thin, ring-shaped tack at the dissection site only, rather than applying a stent over the overall plaque site.

Devices and methods establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature. Devices and methods are configured for procedures performed through a transcarotid approach for performing transcarotid procedures, including carotid angioplasty, stent deployment, and post stent deployment procedures.

An apparatus for inserting a stent into a bodily structure of a subject, the apparatus comprising: a housing; a stent guide wire having a distal terminus; a stent pusher having a distal terminus; a feeding mechanism for moving the distal terminus of the stent guide wire and the distal terminus of the stent pusher distally, the feeding mechanism including a rotatable actuator engageable to move said respective termini; wherein the feeding mechanism is configured such that rotation of the actuator in a first direction concurrently advances the distal terminus of the stent guide wire and the distal terminus of the stent pusher until the distal terminus of the stent guide wire reaches a first predetermined position at which continued rotation of the actuator in the first direction advances only the distal terminus of the stent pusher until the distal terminus of the stent pusher reaches a second predetermined position, at which continued rotation of the actuator in the first direction is prevented and the stent is positioned at or proximate a desired stent delivery position, and wherein the feeding mechanism is further configured such that rotation of the actuator in a second direction, opposite the first direction, retracts the distal terminus of the stent guide wire until the distal terminus of the stent guide wire is retracted into the apparatus.

The utility model discloses an artery opening support relates to medical instrument technical field, and this artery opening support, including support main part and anchoring section, support main part and anchoring section are fixedly connected through anchoring bridge muscle, support main part includes the multiple support ring and multiple bridge muscle of parallelly arranged, and the valley of a support ring is connected with the wave crest of another support ring of oolong between the multiple parallel support ring through bridge muscle, anchoring section includes the anchoring bridge muscle of shape as sinusoidal curve and the anchoring ring of long and short staggered double -row structure, and the wave crest of support ring in support main part is connected with the long and short staggered junction point of double -row structure's anchoring ring through anchoring bridge muscle and tail wing.