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CN-224206937-U - Novel valve conveying device and novel valve conveying system

CN224206937UCN 224206937 UCN224206937 UCN 224206937UCN-224206937-U

Abstract

The application discloses a novel valve conveying device and a novel valve conveying system. The novel valve conveying device comprises an outer sheath tube, an inner sheath tube movably penetrates through the outer sheath tube, a release wire penetrates through the inner sheath tube, a core tube movably penetrates through the inner sheath tube, a fixed end is arranged at one end of the core tube, a fixed claw and a recovery guide piece are further connected to the core tube, two limiting pieces located between the fixed end and the fixed claw are further arranged on the core tube, the recovery guide piece is slidably arranged between the two limiting pieces, the recovery guide piece is matched with the core tube in an axial guiding mode along the core tube, the capsule assembly comprises a capsule cavity and a traction wire, the traction wire is movably arranged in the core tube in a penetrating mode, one end of the traction wire is connected with the capsule cavity, and the capsule cavity is used for loading a valve support connected by the fixed end and the fixed claw. Through the mode, the novel valve conveying device provided by the application can avoid the situation that the valve support is worn when the capsule cavity is retracted.

Inventors

  • Ming Tingbo
  • FENG JUNHUA
  • SUN MING

Assignees

  • 武汉唯柯医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20241231

Claims (11)

  1. 1. A novel valve delivery device, comprising: an outer sheath; The inner sheath tube is movably arranged in the outer sheath tube in a penetrating way, and a release wire is arranged in the inner sheath tube in a penetrating way; The valve support comprises an inner sheath tube, a core tube, a release wire, a release guide piece, a core tube, a release guide piece, a release wire and a release guide piece, wherein the core tube is movably arranged in the inner sheath tube in a penetrating way, one end of the core tube is provided with a fixed end, the core tube is also connected with a fixed claw and a recovery guide piece, two limiting pieces which are arranged between the fixed end and the fixed claw and are spaced apart are also arranged on the core tube, the recovery guide piece is arranged between the two limiting pieces in a sliding way, and the recovery guide piece is matched with the core tube along the axial direction of the core tube; The capsule assembly comprises a capsule cavity and a traction wire, wherein the traction wire is movably arranged in the core tube in a penetrating mode, one end of the traction wire is connected with the capsule cavity, and the capsule cavity is used for loading a valve bracket connected by the fixed end and the fixed claw; Wherein the recovery guide is used for guiding the capsule cavity to move into the outer sheath tube when recovering the capsule cavity.
  2. 2. The novel valve delivery device of claim 1, wherein the retrieval guide comprises a base and a tapered self-expanding portion, a small end of the tapered self-expanding portion connected to the base, a large end of the tapered self-expanding portion facing away from the fixed jaw; Wherein the base is provided with an inner hole so as to be sleeved on the core pipe, and the ratio of the aperture of the inner hole to the outer diameter of the core pipe is 1 to 1.5.
  3. 3. The novel valve delivery device of claim 2, wherein the ratio of the equivalent outer diameter of the large end of the tapered self-expanding portion to the open outer diameter of the capsule cavity is 1.1 to 1.5 and the ratio of the equivalent outer diameter to the inner diameter of the outer sheath is 0.9 to 1.0.
  4. 4. The novel valve delivery device of claim 2, wherein the tapered self-expanding portion comprises a plurality of self-expanding stems circumferentially distributed about the base and splayed.
  5. 5. The novel valve delivery device of claim 4, wherein the tapered self-expanding portion further comprises a connecting wire connecting each of the self-expanding stems, the connecting wire being located outside of the tapered space defined by the plurality of self-expanding stems, the connecting wire being a memory wire or a polymeric elastic wire.
  6. 6. The novel valve delivery device of claim 4, wherein the tapered self-expanding portion further comprises a cover layer disposed outside each of the self-expanding stems, the cover layer being a polymeric elastic coating or a woven mesh woven from memory wires.
  7. 7. The novel valve delivery device of claim 2, wherein the tapered self-expanding portion is a woven mesh structure woven from memory wires.
  8. 8. The novel valve delivery device of claim 7, wherein the mesh structure comprises a tapered sub-mesh and a cylindrical sub-mesh, wherein a small end of the tapered sub-mesh is connected to the base, a large end of the tapered sub-mesh is connected to the cylindrical sub-mesh, the mesh density of the tapered sub-mesh is greater than the mesh density of the cylindrical sub-mesh, and an end of the cylindrical sub-mesh facing away from the tapered sub-mesh is expanded.
  9. 9. The novel valve delivery device of claim 1, wherein the spacing between the spacing member proximate the fixed end and the fixed end is 10-30mm and the axial spacing of the two spacing members along the core tube is 1-20mm.
  10. 10. The novel valve delivery device of claim 2, wherein a first guide portion is provided on the core tube, a second guide portion is provided on the base, the first guide portion and the second guide portion are in guiding engagement along the axial direction of the core tube, the first guide portion is one of a sliding rail and a sliding chute, and the second guide portion is the other of the sliding rail and the sliding chute.
  11. 11. A novel valve delivery system comprising a valve stent and a novel valve delivery device according to any one of claims 1 to 10 for loading and delivering the valve stent.

Description

Novel valve conveying device and novel valve conveying system Technical Field The application relates to the technical field of related instruments for interventional valve surgery, in particular to a novel valve conveying device and a novel valve conveying system. Background Transcatheter aortic valve replacement (TRANSCATHETER AORTIC VALVE REPLACEMENT, TAVR) is a minimally invasive procedure that has been widely practiced internationally for treatment of aortic valve disease by delivering a prosthetic heart valve to the aortic valve site via interventional catheter techniques, thereby completing implantation of the prosthetic valve and restoring valve function. TAVR has the advantages of small trauma, quick recovery, high quality of life after operation of patients, and the like, and becomes the trend of treating aortic valve diseases currently. Aiming at the reverse flow type aortic valve diseases, the existing TAVR products mostly adopt a form of a bracket with a positioning piece, the positioning piece is inserted into the valve sinus to position the valve, the position of the valve leaflet of the valve is overlapped with that of a native valve leaflet of a human body, better postoperative hemodynamics of the valve is guaranteed, meanwhile, the clamping force of the positioning piece and the valve frame to the native valve leaflet is guaranteed, the strong support property of the valve after implantation is guaranteed, and the TAVR products are suitable for the reverse flow type aortic valve diseases. In TAVR operation, the delivery system delivers the valve stent to the ascending main section, the valve stent main body is compressed in the capsule cavity to be released, and three positioning pieces of the valve are inserted into the valve sinus by controlling the forward and rotation of the delivery system, and then the valve is released. At present, a reverse flow valve adopts a forward release mode, a capsule cavity moves towards the ventricular direction through a control handle, so that a bracket is released, and in the process of recovering the capsule cavity, the capsule cavity is often attached to the great curved side of a blood vessel due to the anatomical form of human vascular tissue, and the bottom of the bracket is easily hung by the capsule cavity in the process of recovering the capsule cavity, so that the bracket is worn. Disclosure of utility model The application mainly provides a novel valve conveying device and a novel valve conveying system, which are used for solving the problem that an existing novel valve conveying device is easy to take a valve bracket when a capsule cavity is retracted. In order to solve the technical problems, the application adopts a technical scheme that a novel valve conveying device is provided. The novel valve conveying device comprises an outer sheath tube, an inner sheath tube, a core tube, a capsule assembly, a capsule cavity and a capsule pulling wire, wherein the inner sheath tube is movably arranged in the outer sheath tube in a penetrating mode, the release wire is arranged in the inner sheath tube in a penetrating mode, one end of the core tube is provided with a fixed end, the core tube is further connected with a fixed claw and a recovery guide piece, two limiting pieces are arranged between the fixed end and the fixed claw in a sliding mode at intervals, the recovery guide piece is slidably arranged between the two limiting pieces, the recovery guide piece is matched with the core tube along the axial direction of the core tube, the fixed end is used for being connected with a first end of a valve support, the release wire and the fixed claw are used for being matched with a second end of the valve support, the capsule assembly comprises a capsule cavity and a capsule pulling wire, the capsule cavity is movably arranged in the core tube in a penetrating mode, one end of the capsule cavity is connected with the capsule cavity, the capsule cavity is used for being loaded with the valve support connected with the fixed claw, and the recovery guide piece is used for guiding the capsule cavity to move to the outer sheath tube when the capsule cavity is guided by the guide piece. In some embodiments, the recovery guide comprises a base and a tapered self-expanding portion, a small end of the tapered self-expanding portion being connected to the base, a large end of the tapered self-expanding portion facing away from the fixed jaw; Wherein the base is provided with an inner hole so as to be sleeved on the core pipe, and the ratio of the aperture of the inner hole to the outer diameter of the core pipe is 1 to 1.5. In some embodiments, the ratio of the equivalent outer diameter of the large end of the tapered self-expanding portion to the open outer diameter of the capsule cavity is from 1.1 to 1.5, and the ratio of the equivalent outer diameter to the inner diameter of the outer sheath is from 0.9 to 1.0. In some embodiments, the tapered self-expand