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CN-122005202-A - Ophthalmic minimally invasive cutting, recycling and transplanting integrated instrument

CN122005202ACN 122005202 ACN122005202 ACN 122005202ACN-122005202-A

Abstract

The invention provides an ophthalmic minimally invasive cutting, recycling and transplanting integrated instrument, which is formed by sleeving an operation handle sleeve, an intermediate limiting sleeve and a cutting and collecting device in sequence along a central axis, wherein the intermediate limiting sleeve can axially move, the proximal end of the intermediate limiting sleeve is connected with the operation handle sleeve through a gear adjusting structure, the distal end of the intermediate limiting sleeve is sleeved outside the cutting and collecting device, a negative pressure channel is arranged in the cutting and collecting device, an executing assembly is arranged at the distal end of the intermediate limiting sleeve, the executing assembly comprises a plurality of elastic arms, annular cutting edges and a material containing net crossing the channel, the elastic arms are circumferentially distributed, limiting surfaces are arranged on the inner wall of the intermediate limiting sleeve and used for limiting the radial opening amount of the elastic arms, the position of the intermediate limiting sleeve can be changed through the gear adjusting structure, so that the coating length and the limiting position of the intermediate limiting sleeve on the elastic arms can be adjusted, and the opening diameter of the annular cutting edges can be accurately controlled.

Inventors

  • LI YUN
  • CAI YUTING
  • YUAN KEJIA
  • LI XINGYUAN

Assignees

  • 中南大学湘雅二医院

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The ophthalmic minimally invasive cutting, recovering and transplanting integrated instrument is characterized by comprising an operation handle sleeve, a middle limiting sleeve and a cutting and collecting device, wherein the operation handle sleeve, the middle limiting sleeve and the cutting and collecting device are sequentially sleeved and connected along the same central axis; The middle limit sleeve is axially and movably arranged between the operation handle sleeve and the cutting and collecting device, the proximal end of the middle limit sleeve is in fit connection with the operation handle sleeve through a gear adjusting structure, and the other end of the middle limit sleeve extends out of the operation handle sleeve and is coaxially sleeved outside the cutting and collecting device; A negative pressure channel penetrating to the far end of the cutting and collecting device is arranged in the cutting and collecting device, and an executing component is arranged at the far end of the cutting and collecting device; The execution assembly comprises a plurality of elastic arms distributed along the circumferential direction, an annular cutting edge connected to the tail ends of the plurality of elastic arms, and a material storage net which is arranged in the negative pressure channel, is positioned on one side of the proximal end of the annular cutting edge and spans across the negative pressure channel; The inner wall of the other end of the middle limit sleeve forms a limit surface matched with the elastic arms and is used for limiting the radial opening amount of the elastic arms; The gear adjusting structure is used for positioning the middle limiting sleeve at different axial gears so as to change the cladding length and the limiting position of the middle limiting sleeve on the plurality of elastic arms, thereby limiting the opening diameter of the annular cutting edge.
  2. 2. The integrated instrument according to claim 1, wherein the gear adjusting structure comprises a row of tooth sockets arranged on the side wall of the operating handle sleeve in sequence along the axial direction, a gear shifting piece arranged on the outer side of the operating handle sleeve, and a spring plate locking claw arranged in the gear shifting piece and matched with the tooth sockets; The elastic sheet locking claw stretches into the corresponding tooth groove in a natural state to lock the middle limiting sleeve at the corresponding gear position, when the elastic sheet locking claw is pressed to withdraw from the current tooth groove, the middle limiting sleeve can slide relative to the operating handle sleeve in the axial direction, and after the pressing is released, the elastic sheet locking claw is clamped into the adjacent tooth groove under the elastic restoring action to realize gear-by-gear positioning adjustment of the middle limiting sleeve.
  3. 3. The integrated instrument of claim 2, wherein the shift member is fixedly connected to the proximal end of the intermediate stop collar, or the shift member is connected to the proximal end of the intermediate stop collar by a connection portion penetrating through the guide slot in the sidewall of the operating handle sleeve, so that the shift member moves along the guide slot to drive the intermediate stop collar to move axially synchronously.
  4. 4. The integrated instrument of claim 2, wherein the intermediate stop collar is a rigid tube having an inner diameter less than a maximum outer diameter of the plurality of resilient arms in a naturally expanded state; the outer side surfaces of the elastic arms and the inner wall of the far end of the middle limit sleeve are in elastic abutting connection or limit matching relation, and when the middle limit sleeve is positioned at different axial positions, the constraint degrees of the elastic arms are different, so that the annular cutting edge has different opening diameters.
  5. 5. The integrated instrument of claim 1, wherein the proximal end of the cutting and harvesting device is provided with a negative pressure connector in communication with the negative pressure channel, the negative pressure connector comprising a negative pressure connector disposed at the proximal end of the handle sleeve, the negative pressure connector configured as a standard luer connector or tubing connector for interfacing with an external negative pressure source.
  6. 6. The integrated instrument of claim 5, wherein the middle section of the tube wall of the cutting and collecting device is communicated with an elastically deformable bag body, the internal cavity of the elastically deformable bag body is in fluid communication with the negative pressure channel, and the elastically deformable bag body has a self-recovery structure capable of generating rebound suction force.
  7. 7. The integrated instrument of claim 1, wherein the elastic arms are 4-8 radially arranged nitinol stents having an outwardly expanding preset shape.
  8. 8. The integrated instrument according to claim 1, wherein the annular cutting edge is a flexible closed coil or is surrounded by a blade band arranged at the tail end of each elastic arm, the annular cutting edge is made of ultrathin metal wires or miniature blade bands, and the annular cutting edge can be adaptively changed in circumferential dimension along with the radial position change of the elastic arm.
  9. 9. The integrated instrument of claim 1, wherein the material receiving mesh is a microporous flexible screen with edges attached to the inside of the plurality of resilient arms and covering the distal open section of the negative pressure channel.
  10. 10. The integrated instrument of claim 1, wherein the intermediate stop sleeve has an outer diameter of 23G or 25G standard ophthalmic minimally invasive instrument gauge.

Description

Ophthalmic minimally invasive cutting, recycling and transplanting integrated instrument Technical Field The invention relates to the technical field of medical instruments, in particular to an ophthalmic minimally invasive cutting, recycling and transplanting integrated instrument. Background In the field of ophthalmic surgery, tissue transplantation has become an important clinical approach, especially in the treatment of complex fundus diseases such as giant macular holes, retinal detachment, etc. During surgery, a physician is often required to prepare and implant a sheet of micro-tissue of a particular size, such as the anterior capsule, posterior capsule, or amniotic membrane of the lens, as a biological scaffold or tamponade material, into the target area. However, the existing surgical instruments and methods of operation still have the following significant drawbacks in clinical applications: First, the preparation of micrografts is difficult and precision is difficult to guarantee. For the biological materials with light and thin textures such as amniotic membrane, cyst membrane and the like, the conventional manual cutting mode is difficult to prepare standard circular tissue pieces with neat edges and precise diameters at millimeter or sub-millimeter levels. Because of the lack of standardized preparation means, uncontrollable implant sizes often directly affect the surgical consistency and final therapeutic effect. Secondly, the risk of operation is high and iatrogenic injury is easily caused. In acquiring an intraocular operation scene such as a body retina implant, because the intraocular space is extremely narrow, different surgical instruments often need to be replaced frequently when electrocoagulation, cutting, grasping and transferring fragile tissues. The frequent instrument access not only has complicated operation steps, but also greatly increases the risk of iatrogenic injury to healthy tissues in the eye. Finally, the operating efficiency is low and the process is not controllable. Traditional tissue sheet transfer relies on forceps to clamp or two hands to operate cooperatively, and under complex liquid flow environments, tiny tissue sheets are extremely prone to folding, curling and breakage, and even are lost in liquid flow. This "cut-grasp-transfer" discontinuous mode of operation not only results in prolonged procedure time, but is more likely to result in surgical failure due to accidental damage or loss of the implant. Therefore, there is a great clinical need for a minimally invasive instrument that integrates standardized cutting, safe recovery, and precise implantation to simplify the procedure, improve the manufacturing accuracy, and reduce the risk of surgery. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide an ophthalmic minimally invasive cutting, recycling and transplanting integrated instrument, and aims to solve the technical problems of poor preparation precision of tiny tissue slices, easy loss of recycling, inaccurate transplanting and high damage risk caused by frequent replacement of instruments in ophthalmic surgery. In order to achieve the aim, the invention provides an ophthalmic minimally invasive cutting, recovering and transplanting integrated instrument which comprises an operation handle sleeve, a middle limit sleeve and a cutting and collecting device, wherein the operation handle sleeve, the middle limit sleeve and the cutting and collecting device are sequentially sleeved and connected along the same central axis; The middle limiting sleeve is axially and movably arranged between the operating handle sleeve and the cutting and collecting device, the proximal end of the middle limiting sleeve is connected with the operating handle sleeve in a matched manner through a gear adjusting structure, and the other end of the middle limiting sleeve extends out of the operating handle sleeve and is coaxially sleeved outside the cutting and collecting device; the cutting and collecting device is internally provided with a negative pressure channel which penetrates through to the far end of the cutting and collecting device, and the far end of the cutting and collecting device is provided with an executing component; the execution assembly comprises a plurality of elastic arms distributed along the circumferential direction, annular cutting edges connected to the tail ends of the plurality of elastic arms, and a material storage net which is arranged in the negative pressure channel, is positioned on one side of the proximal end of the annular cutting edges and spans the negative pressure channel; The inner wall of the other end of the middle limit sleeve is provided with a limit surface matched with a plurality of elastic arms, and the limit surface is used for limiting the radial opening amount of the elastic arms; The gear adjusting structure is used for positioning the middle limiting sleeve at different axial gear