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CN-122005150-A - Degradable sectional type tracheal stent

CN122005150ACN 122005150 ACN122005150 ACN 122005150ACN-122005150-A

Abstract

The application provides a degradable sectional type tracheal stent, which adopts a sectional type modularized connection combination structure and comprises stent modules, sliding parts, locking mechanisms and splicing structures, wherein a plurality of stent modules are connected in a sliding way through the sliding parts to form stent units which are axially projected to be C-shaped or round, the locking mechanisms are used for limiting locking between the stent modules, the splicing combination of the stent units which are axially detachable is realized through the splicing structures, the structure is simple, the connection is stable and easy to operate, the connection quantity of the stent modules can be adjusted according to the size of a tracheal supporting channel, the splicing quantity of the stent units can be flexibly adjusted according to the narrow length of a tracheal, different patient requirements are met, and the degradable stent further comprises visual marks which are arranged on the stent modules and display different colors layer by layer along with degradation progress, and the visual inspection of an endoscope or an image can be used for judging the degradation state of the stent, so that the monitoring function of the degradation progress of the stent is realized.

Inventors

  • SU YANWEN
  • ZHANG YABO

Assignees

  • 深圳博瑞捷生物科技有限公司

Dates

Publication Date
20260512
Application Date
20260403

Claims (9)

  1. 1. The utility model provides a degradable sectional type trachea support, its characterized in that includes support module, slider, locking mechanism and mosaic structure, a plurality of pass through between the support module is two liang the slider sliding connection forms axial projection and is C shape or circular support unit, locking mechanism is used for prescribing a limit to the locking between the support module two by two, realizes through mosaic structure can be dismantled the concatenation combination in the axial between the support unit two by two.
  2. 2. The degradable segmented tracheal stent of claim 1, wherein the stent module is an arc segment in an arc shape, and a sliding rail is arranged on the arc segment from one end to the other end along the arc length; The sliding parts are arc-shaped strips which are adaptive to the support modules, the sliding parts are in sliding fit with the sliding rails, and the support modules are detachably connected in a sliding mode through the sliding parts and the sliding rails.
  3. 3. The degradable segmented tracheal stent of claim 2, wherein the locking mechanism is configured to constrain the sliding members to slide unidirectionally along the sliding rails all the time, and wherein the locking is defined by a reverse check constraint force of the sliding members sliding unidirectionally on the sliding rails of the stent modules in pairs when the stent modules slide relatively to and against each other along the arc length of the sliding members.
  4. 4. A degradable segmented tracheal stent as in claim 3, wherein the locking mechanism comprises detents, limit bosses and splines; A groove is formed in the inner cambered surface close to the two ends of the sliding piece, the pawl is hinged in the groove through a limiting boss, and the front end of the pawl always has a trend of extending outwards of the groove; the tooth grooves are arranged on the sliding rail matched with the intrados of the sliding piece, and when the sliding piece slides along the sliding rail, the pawls are meshed with the tooth grooves in an adaptive manner to form unidirectional constraint, so that the sliding piece cannot reversely retract.
  5. 5. The degradable segmented tracheal stent of claim 2, wherein the number of sliding rails is two or more when the axial length of the stent module is 20mm or more, the number of sliding pieces corresponding to the number of sliding rails; when the number of the sliding rails is two, the two sliding rails are arranged at the two axial ends close to the bracket module at intervals; When the number of the sliding rails is multiple, the sliding rails are arranged at equal intervals along the axial direction of the bracket module.
  6. 6. The degradable segmented tracheal stent of claim 2, wherein the arcuate length of the slider is no less than the arcuate length of the stent module.
  7. 7. The degradable segmented tracheal stent according to claim 1, wherein the splicing structure comprises a first connector arranged at one axial end of the stent module and a second connector arranged at the other axial end of the stent module, the first connector is matched with the second connector, and the two stent units are detachably spliced and combined by the matched connection of the first connector and the second connector.
  8. 8. The degradable segmented tracheal stent of claim 1, wherein the number of stent modules of the stent unit is two or three.
  9. 9. The degradable segmented tracheal stent of any one of claims 1-8, further comprising a visual marker disposed on the stent module, the visual marker comprising a plurality of layers of marker rings of different colors, the degradation rate of the marker rings being consistent with the degradation rate of the stent module, the marker rings fading out layer by layer as the degradation progresses to appear different colors.

Description

Degradable sectional type tracheal stent Technical Field The invention belongs to the technical field of medical appliances, and particularly relates to a degradable sectional type tracheal stent. Background The softening of human trachea is an airway disease, which is mainly manifested by the loss or softening and collapse of cartilage ring of trachea, resulting in the failure of trachea to maintain normal shape and function. In clinic, various pathological degenerative factors or iatrogenic operations can cause the damage of the supporting structure of the tracheal wall, and cause the tracheal softening, thus further inducing a series of respiratory complications which can endanger life, such as dyspnea, cough, wheezing and the like. The nature of tracheal softening is dynamic stenosis or collapse of a lumen caused by insufficient supporting force of a tracheal wall, such as congenital tracheal cartilage hypoplasia, insufficient number of tracheal cartilage rings, thinned thickness or disordered arrangement of elastic fibers of a patient, and low supporting force of the tracheal wall after birth, and serious tracheal defect caused by large-area defect of the tracheal wall caused by trauma and long-section tracheal defect after tumor resection. In order to solve the problem of tracheal softening, a tracheal stent implantation technical means is generally adopted in clinic to reconstruct and form a tracheal supporting channel, wherein the degradable tracheal stent has the remarkable advantages of gradual degradation along with tissue healing, good biocompatibility and the like, and has become a research hot spot in recent years. The degradable tracheal stent in the prior art still has the technical defects that firstly, the structural design is unreasonable, most of the degradable tracheal stent is of a fixed integrated forming structure, as disclosed in patent CN202421724489.2, the elastic and flexible characteristics of a biological base material of the C-shaped tracheal stent are utilized, when the degradable tracheal stent is implanted, the opening size of the C-shaped opening is broken to be sleeved in a tracheal supporting position, but the operation space is limited, the operation precision requirement on doctors is higher, in addition, the fixed integrated structural stent is limited by the diameter and the length size, the actual requirements of different lengths and diameters cannot be adapted in clinical application scenes, even if personalized customization is adopted for matching, the manufacturing process controllability and repeatability are poor, the industrial production prospect is not realized, secondly, the function is relatively single, the time sequence matching of 'bionic supporting-degrading' is focused, the structure is of a 3D printing degradable bionic tracheal outer stent disclosed in patent CN113143556B is mostly of a mesh simplified structure, a certain bionic supporting function is realized, but the problem of easy premature degradation or residual foreign matters cannot occur due to the fact that the effective degradation progress monitoring means of the stent is lacking in time. The invention patent with the application number 202511779728.3 provides a degradable sectional type tracheal stent and an implantation method, which comprises a plurality of annular rib plates coaxially arranged and connected between two rib plates to form a net shape, and also comprises a connecting part, wherein the connecting part comprises a first connecting body arranged at two axial ends of the stent body and a second connecting body matched with the first connecting body, and the first connecting body and the second connecting body are matched to realize the axial detachable connection combination between two stent bodies, so that the axial length of the stent body is adjustable, the bionic axial bending deformation and the stable connection combination between two stent bodies are effectively realized. The application also provides a degradable sectional type tracheal stent implantation method which comprises the steps of obtaining the size of a lesion trachea, determining the diameter and the combination number of the stent main body, sleeving the lesion trachea and connecting and combining to complete implantation. The tracheal stent provided by the invention realizes the axial length adjustment of the stent main body and the axial detachable stable connection combination between every two stent main bodies, mainly solves the problems of the fixed limitation of the axial length of the stent and the insufficient mechanical property of the support of the connecting and stitching structure between multiple stents, and the stent main body is still of a C-shaped integrated structure, so that the problem of easy implantation of the stent main body in the radial sleeved tracheal support position is not solved, wherein the problem depends on the radial elastic deformation of degradable materials d