34 results about "Tracheal stent" patented technology

The utility model provides a tracheal stent structure and an artificial trachea. The tracheal stent structure comprises a main body, the main body comprises a plurality of supporting units which are linearly arranged at intervals; each supporting unit is of a C-shaped structure with an opening, a connecting unit is arranged between every two adjacent supporting units, and each connecting unit is of a structure with a hole. According to the tracheal stent assembly, the bionic tubular structure similar to the tracheal structure of the human body is formed by arranging the structure, so that the contraction and expansion functions can be achieved in the breathing process, and the physiological function requirements are met.

The invention provides a degradable combined type tracheal stent and an implantation method, the degradable combined type tracheal stent comprises a plurality of rib plates which are coaxially arranged and are in an annular shape and soft bodies which are connected between every two rib plates and are in a net shape, and axial length adjustability and axial bending deformation of a stent main body are achieved through the soft bodies; the support further comprises a connecting part, the connecting part comprises a first connecting body arranged at the two axial ends of the support 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 achieve axial detachable connection and combination between every two support bodies. The adjustable axial length of the stent main body, bionic axial bending deformation and stable connection and combination between every two stent main bodies are effectively realized. The invention further provides an implantation method of the degradable combined type tracheal stent, the implantation method comprises the steps of obtaining the size of the diseased trachea, determining the diameter and the combination number of the stent body, sleeving the diseased trachea and connecting the combination to complete implantation, and the method is easy to operate and can meet different requirements of clinical complex environments.

The invention relates to the technical field of medical instrument design, in particular to a tracheal stent mechanical property optimization design method based on multi-scale finite elements. According to the mechanical property optimization design method for the tracheal stent provided by the invention, microstructure parameter evolution and macroscopic physiological environment response are deeply integrated through a multi-scale finite element model, and a time-varying material attribute algorithm module is originally introduced to realize dynamic mechanical coupling simulation in a degradation process; in combination with an intelligent early-warning mechanism for dissection partition differentiation erosion boundaries and structural failure, collaborative optimization of mutual exclusion performance indexes such as flexible contact stress distribution of radial supporting force of the stent and long-term structural integrity is precisely coordinated, and a Pareto optimal solution is output on the premise of guaranteeing biocompatibility constraint; according to the method, core technical obstacles of micro effect distortion and dynamic performance prediction deficiency in traditional design are fundamentally solved, and a personalized stent design scheme with high reliability, low complication risk and long service cycle is provided for clinic.

The invention relates to the technical field of medical instruments, in particular to an absorbable tracheal stent containing a drug coating, which comprises a cylindrical shell, the shell comprises a longitudinal skeleton, a ring-shaped skeleton, an extension drug groove and an assembly groove, and the extension drug groove is filled with a drug coating strip; a covering film is pasted on the outer portion of the shell and comprises a tightening film, a contact film and a sealing film. According to the invention, the sealing film is firstly degraded in the trachea of a patient, and the stress on the shell corresponding to the outward expanding medicine groove is released, so that the outward expanding medicine groove is expanded, the outer diameter of the whole tracheal stent is increased, and the medicine coating strip is driven to synchronously expand outwards to abut against an affected part, so that the stent can be automatically degraded in the body of the patient; and the expansion force of the stent can be slowly released in the degradation process, so that the reduction of the expansion force of the stent caused by thinning of the wall of the degraded stent or natural growth of the trachea is counteracted, the expansion force of the stent is dynamically maintained, and the stability of the stent is improved.

The utility model discloses a pumping and diffusing dual-purpose gas circuit structure on a gas detector. The pumping and diffusing dual-purpose gas circuit structure comprises a calibration cover assembly, a shell, a sensor assembly, a gas pipe bracket and a gas pump assembly, the calibration cover assembly is detachably connected with the shell; a plurality of air holes are formed in the shell; one end of the tracheal stent is communicated with the air hole of the shell, and the other end is communicated with the air pump assembly; the sensor assembly is arranged under the air hole. The air pump assembly is arranged below the sensor assembly; the calibration cover assembly comprises a filtering assembly, a rotating assembly, a calibration cover and an air chamber frame; the filtering assembly is arranged at one end of the calibration cover, and the air chamber frame is arranged in the calibration cover and arranged above the shell; one end of the rotating assembly penetrates through the calibration cover and the air chamber frame and then is detachably connected with the shell. According to the utility model, the pump suction mode and the diffusion mode can be freely switched, and the pump suction mode and the diffusion mode share the same calibration cover assembly for calibration, so that the consistency of the detection precision of the pump suction mode and the diffusion mode can be ensured.

The utility model relates to medical instrument technical field, concretely is tracheal stent that can be absorbed and contains drug coating, including the casing of cylindrical cylinder shape, the casing includes longitudinal skeleton, ring skeleton, the drug groove of outward expansion and assembly groove, the drug coating strip is filled in the drug groove of outward expansion, the outside of casing is pasted with the film, the film includes the shrinkage film, contact touch and closed film, the utility model discloses through the degradation of closed film in patient trachea first, releases the stress on the corresponding casing at the drug groove of outward expansion, makes the drug groove of outward expansion, and the outer diameter of whole tracheal stent expands along with it, and drives drug coating strip synchronous expansion and presses outward and expands the patient place, realizes that the stent can be in the patient's body self -degradation, and the expansion force of stent can be slowly released in the process of degradation, thereby offset the stent wall thinning after degradation or the trachea natural growth leads to the stent expansion force reduction, dynamically maintained the expansion force of stent, increased the stability of stent.

The present invention provides a bionic composite artificial trachea, comprising: an artificial tracheal wall; the artificial tracheal wall comprising a biological patch layer and an absorbable biomaterial layer from the inside out; a tracheal stent disposed on the outside of the artificial tracheal wall; and a gasket wrapping the edge of the tracheal stent. The bionic composite artificial trachea, with the biological patch layer and the absorbable biomaterial layer as the artificial tracheal wall, combined with the arrangement of the tracheal stent, not only provides good ventilation, but also can slightly deform with airway pressure and has a certain degree of elasticity, so that the patient's head can move freely, without the trouble of having to fix the neck after traditional tracheal surgery; at the same time, the arrangement of the gasket can prevent the end of the tracheal stent from bruising surrounding organs due to friction during the initial implantation period; in summary, the bionic composite artificial trachea provided by the present invention can be applied clinically and can solve the problem of the lack of an effective tracheal substitute for primary tracheal reconstruction during the resection of an extra-long trachea in current tracheal surgery in a single operation.

The utility model relates to a tracheal stent pusher which comprises a restraining assembly, a pushing assembly and a pushing assembly, the restraining assembly comprises a long-strip-shaped rope cage and a traction rope arranged at one end of the rope cage in a connected mode, and the rope cage is used for folding and restraining a tracheal stent; the two ends of the containing pipe are communicated, a deformable guide wire is arranged in the length direction of the containing pipe so that the containing pipe can be bent and shaped, and the rope cage is arranged in the containing pipe in a sliding mode; the pushing pipe is arranged in the placing pipe in a sliding manner and is used for ejecting the rope cage filled with the air pipe bracket out of the placing pipe; the two ends of the pushing pipe are communicated, a wire passing opening is formed in one side of the pushing pipe, and the traction rope penetrates in from the end of the pushing pipe and penetrates out from the wire passing opening. A through biopsy hole is formed in the fiberoptic bronchoscope, the free end of the fiberoptic bronchoscope can penetrate through the pushing pipe and the rope cage in a sliding mode, and the biopsy hole is used for inserting a cutting tool to damage connection of the end, away from the pushing pipe, of the rope cage. The utility model provides a tracheal stent pusher which is simple to operate and high in fault tolerance.

The utility model relates to a fixing device for machining an air inlet pipe support for vehicle accessories. The fixing device comprises a supporting table, a bottom fixing mechanism and a side face fixing mechanism. The bottom fixing mechanism comprises a horizontal supporting plate and a plurality of first pressing pieces. The horizontal supporting plate is horizontally and rotatably arranged on the supporting table which is provided with a motor. The first pressing piece comprises a first air cylinder and a first pressing block; a plurality of first profiling cushion blocks are arranged on the horizontal supporting plate; the side face fixing mechanism comprises a vertical supporting plate and a plurality of second pressing pieces. The vertical supporting plate is vertically fixed to one end of the horizontal supporting plate, and a plurality of guide columns are arranged on the front face of the vertical supporting plate. A plurality of second profiling cushion blocks are arranged on the front face of the vertical supporting plate. The second pressing piece comprises a second air cylinder and a second pressing block; the second air cylinder is fixed to the front face of the vertical supporting plate. The two air inlet pipe supports can be machined at the same time, installation is convenient, and the finish machining efficiency is improved.

The utility model discloses a tracheal stent, and belongs to the technical field of biomedical prostheses. The tracheal stent is of an open tubular structure with a U-shaped axial cross section, end lugs are arranged at two ports of the open tubular structure, supporting rods are arranged in the end lugs in a penetrating mode, small holes are formed in the tube wall of the open tubular structure, and the tracheal stent is similar to a tracheal cartilage ring. The flexible pipe can be folded and unfolded in the breathing process, the physiological function is met, the mechanical strength and deformation recovery of the flexible pipe can be improved through the end lugs and the supporting rods, and meanwhile tissue adhesion growth is facilitated through the small holes in the pipe wall.

The present invention relates to the technical field of tracheal stents, and discloses an integrated coated branch tracheal stent and a manufacturing method thereof, comprising a main tracheal silicone sleeve, the side surfaces of the left bronchial silicone sleeve and the right bronchial silicone sleeve are both provided with second through holes, and the bottom of the main tracheal silicone sleeve, the bottom of the left bronchial silicone sleeve and the bottom of the right bronchial silicone sleeve are all fixed with second memory metals. In the process of extending the integrated coated branch tracheal stent into the human body, the first memory metal and the second memory metal can be bent and deformed, and after the device is installed, the power-on columns on the contacts and the second memory metal are powered on, and the first memory metal and the second memory metal are automatically restored, thereby automatically opening the main tracheal silicone sleeve, the left bronchial silicone sleeve and the right bronchial silicone sleeve, so that the device can better open the human trachea and make the patient breathe more smoothly.

The invention provides an anti-displacement tracheal stent and a human body implantation method, solves the problem that the tracheal stent is easy to deviate and misplace in the prior art, limits the whole stent body in human tissues through a positioning bulge, avoids displacement of the tracheal stent, and comprises a sleeve-shaped stent body, a connecting column extending outwards is arranged on the outer side wall of the support body, a positioning protrusion is arranged at the outer end of the connecting column, and the cross section area of the positioning protrusion is larger than that of the connecting column. The stent body, the connecting columns and the positioning protrusions are formed by integrally weaving silk threads made of memory metal materials and covering the silk threads with films.

1. The name of this design product: tracheal stent. 2. Purpose of this design product: Vibration plate accessory mounting bracket. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model discloses an automatic rubberizing device for an air pipe support, which comprises a feeding part, an ejecting part, a pressing and pasting part, a glue supply part and the like, and the air pipe support is fed into a pasting chute through the feeding part; the material ejecting part ejects the air pipe support along the pasting sliding groove, and the air pipe support is conveyed to a pasting position; the pressing and pasting component presses and pastes the adhesive tape to the inner arc face of the tracheal stent at the pasting position. According to the automatic pasting device, the pasting sliding groove, the feeding component, the material ejecting component, the pressing and pasting component, the glue supplying component and the like are matched and cooperatively act, so that the double-faced adhesive tape is attached to the air pipe support, automatic pasting of the air pipe support can be conducted, the pasting efficiency is improved, the labor cost is reduced, and the automatic machining level is improved.

The utility model relates to a lung mould capable of training tracheal stent implantation, which comprises a mould lung, and a main trachea, a main bronchus, a lung lobe bronchus and a lung segment bronchus which are connected in sequence, at least one of the main trachea, the main bronchus, the lung lobe bronchus and the lung segment bronchus is provided with a simulation trachea, a simulation airway is arranged in the simulation trachea, and the simulation trachea is provided with an air inlet and an air outlet. The inner side of the simulated trachea is provided with a protruding part capable of narrowing or closing the simulated airway. The lung teaching aid is characterized in that a beginner can perform training in the lung teaching aid by means of a bronchoscope through the arrangement that the simulated airway can be narrowed or closed, and the beginner can simulate exploration and operation in a narrow or blocked airway in an actual operation; therefore, the degree of mastering operations such as accurate positioning and releasing of the stent in the tracheal stent implantation operation in a clinical situation and proper adjustment of the form of the stent in a narrow and complex environment is improved.

The present application discloses an ultrasonic gastroscope-guided transesophageal bronchial intubation kit, comprising: a bronchial intubation catheter, a guide wire and a connector for fixing the guide wire on the ultrasonic gastroscope, the bronchial intubation catheter comprising a main body, a tube head end arranged at the head end of the main body and a universal connection port arranged at the tail end of the main body, a blocking cuff is arranged at the tube head end, an inflation catheter is arranged in the main body, one end of the inflation catheter is connected to the blocking cuff, and the other end passes through one side of the universal connection port and is connected to the inflation cuff; a one-way closed valve for inflating or evacuating air through a syringe is arranged on the inflation cuff. The present invention can provide assisted breathing for patients who cannot be effectively ventilated by auxiliary technologies such as endotracheal intubation and tracheotomy, and can be used as an auxiliary breathing tool for ventilation and prolonging rescue time in case of emergency for patients who are about to undergo bronchoscopy or tracheal stent placement.

The application discloses a 3D printing tracheal stent and a preparation method thereof. The stent comprises a plurality of meridional units and a plurality of weft units. The meridional unit is composed of a first meridional connecting segment, a second meridional connecting segment and a meridional inner convex elastic segment connecting the two. The weft unit is composed of a first weft connecting segment, a second weft connecting segment and a weft inner convex elastic segment connecting the two. A plurality of meridional units are sequentially connected in series along different meridional directions to form a plurality of meridional chains, which are arranged in a circumferential interval. A plurality of weft units are respectively connected between adjacent meridional chains to form a columnar mesh stent together with the meridional chains. The geometric-mechanical coupling characteristics of the meridional inner convex elastic segment and the weft inner convex elastic segment realize the decoupling of the stent support and compliance functions, and fundamentally eliminate the mechanical root cause of the stent displacement.

The invention provides a preparation method of a polylactic acid / fibroin 3D printing tracheal stent, and belongs to the technical field of medical instruments. The preparation method comprises the following steps: mixing polylactic acid and thermoplastic starch according to a specific ratio, granulating, carrying out melt extrusion and drafting to obtain a composite wire, carrying out melt deposition 3D printing, and sequentially soaking in a polyethylene glycol (PEG) aqueous solution and a silk fibroin aqueous solution to obtain the polylactic acid / silk fibroin tracheal stent. Compared with a conventional PLA wire, the composition is simple and controllable. The thermoplastic starch is introduced to regulate and control the melt index and crystallization rate of the PLA, so that the printability of the PLA and the stability of a printed sample are improved. PEG is used for soaking, and PEG molecules can permeate into the tracheal stent, so that the stent is slightly swelled and softened, and the hydrophilicity of the stent is improved. The silk protein is coated on the surface of the stent, so that the biocompatibility of the stent is improved. The fused deposition 3D printing process is more stable than a direct-writing 3D printing process, and the tracheal stent with uniform and stable performance can be prepared more easily.

The utility model relates to a special drilling tool for a bracket, which comprises a positioning seat, according to the technical key points, the positioning seat is composed of a horizontal bottom plate, a limiting table and a positioning groove, wherein the horizontal bottom plate is used for being attached to a small horizontal plate section of the four-stage air entraining pipe support; the limiting table is arranged on one side of the horizontal bottom plate and is used for being attached to a vertical plate section of the four-stage air entraining pipe support; the positioning groove is formed in the top surface of the limiting table and is attached to a large horizontal plate section of the four-stage air entraining pipe support; two lower connecting holes used for being connected with the first pressing plate are formed in the horizontal bottom plate, two middle connecting holes used for being connected with the second pressing plate are formed in the side face of the limiting table, and two upper connecting holes used for being connected with the third pressing plate are formed in the top face of the limiting table. The tool can guarantee the drilling size and pitch tolerance requirements of the part, obviously improves the qualified rate of products, omits the step of cutting bottom holes at first, and is high in drilling efficiency.

The invention relates to a functional decellularized tissue engineering tracheal graft compounded with a cervical latissimus flap lining, and belongs to the technical field of tissue engineering and regenerative medicine. The invention provides a functional decellularized tissue engineering tracheal graft compounded with a cervical latissimus flap lining, the graft comprises a cervical latissimus flap, a banded muscle and a decellularized tracheal stent, the cervical latissimus flap lining is arranged on the decellularized tracheal stent, the subcutaneous tissue side of the cervical latissimus flap is attached to the inner wall of the decellularized tracheal stent, and the banded muscle lining is arranged on the inner wall of the decellularized tracheal stent. The banded muscle wraps the outer side of the decellularized tracheal stent. The decellularized tracheal stent used by the graft is perforated at multiple points, is lined with the latissimus latipes flap and is externally covered with the banded muscle, so that the advantages of an autologous flap tissue trachea, allograft tracheal transplantation and a tissue engineering trachea are effectively combined, the structure and the function of an original trachea can be reserved, and the graft has good biomechanical properties and growth potential and is suitable for being used in the field of medical treatment. An immunosuppressive agent does not need to be used, and revascularization and internal and external blood transportation can be quickly realized.

The present invention relates to the technical field of medical materials, and provides a tissue engineering biomimetic tracheal stent with a microenvironment regulation function and a preparation method thereof. The present invention is based on a non-woven fabric reinforced three-dimensional silk fibroin sponge scaffold, on which chondrocytes or quercetin are loaded, and then the obtained cartilage rings and quercetin rings are alternately stacked to form the tissue engineering biomimetic tracheal stent of the present invention. The tissue engineering biomimetic tracheal stent provided by the present invention can stably exist in a living body, and is similar to natural tissue in structure and function. During the pre-vascularization process, it can produce a transmural vascular structure similar to a physiological trachea, thereby providing nutrition and metabolic support for the inner structure of the graft. In addition, quercetin can regulate the immune microenvironment by promoting the polarization of macrophages to an anti-inflammatory phenotype, broadening the application scope of tissue engineering trachea and promoting its clinical application.

The utility model relates to the technical field of tracheal stents, in particular to a positioning anti-sliding covered tracheal stent which comprises a first stent, a supporting mechanism and a protecting mechanism. Supporting mechanisms are connected to the upper portion and the lower portion of the first support, and a protection mechanism is connected to the outer side of the first support. The supporting mechanism comprises an upper arc-shaped rod, an upper recycling rope, a first C-shaped rod, a second support, a second C-shaped rod, a third support, a lower arc-shaped rod and a lower recycling rope, and the upper portion of the first support is fixedly connected with the upper arc-shaped rod. According to the positioning anti-slip covered trachea stent, the upper arc-shaped rod, the first C-shaped rod, the second C-shaped rod and the lower arc-shaped rod expand outwards to form a plurality of outer convex parts which are attached and fixed to the wall of a trachea cavity, and then the covered trachea stent is positioned and anti-slip; anti-tumor and anti-hyperplasia drugs are slowly released from the outer slow-release holes and the inner slow-release holes and enter the trachea to exert the drug effect, and then the covered tracheal stent is used for treatment.

The present invention provides a preparation method of a piezoelectric-driven self-adaptive drug-release electrospun film-covered tracheal stent, belonging to the technical field of medical devices. First, an anti-inflammatory drug is encapsulated in poly(3,4-ethylenedioxythiophene) nanoparticles by emulsion polymerization; PVDF is dissolved in a DMF / acetone mixture to prepare a spinning solution, and a piezoelectric film is formed on the surface of a metal stent by electrospinning; subsequently, Au nanoparticles are coated on both sides of the PVDF fiber membrane as electrodes, and a PDMS film is covered for insulation encapsulation; finally, the drug-loaded nanoparticles are dispersed in a PVA hydrogel, adhered to the easily proliferated parts of the stent, and the hydrogel is connected to the electrodes on both sides through a bioconductive adhesive, thereby obtaining a piezoelectric-driven self-adaptive drug-release electrospun film-covered tracheal stent. The present invention solves the technical problems of many complications in traditional tracheal stent treatment, uncontrollable drug release, and difficulties in optimizing drug binding and piezoelectric properties of PVDF in the application of tracheal stents.

The present invention provides a tracheal stent conveyor and a tracheal stent system. The tracheal stent conveyor includes a binding unit and a supporting unit. The binding unit includes a wire binding tube and a binding wire, the binding wire is inserted into the wire binding tube and the distal end of the binding wire is fixed relative to the distal end of the wire binding tube, and the distal end of the wire binding tube is provided with a plurality of side holes, and in a first state, the binding wire extends from the side holes to form a wire binding ring; the supporting unit includes a supporting rod arranged outside the wire binding tube and moving along the axial direction of the wire binding tube; in the first state, the wire binding ring is wrapped around the tracheal stent, and the closed end of the wire binding ring is inserted into the supporting rod, which is used to bind the tracheal stent to the wire binding tube and the supporting rod; in a second state, the supporting rod is staggered with the distal end of the wire binding tube and is close to the proximal end of the wire binding tube, and the supporting rod is pulled out from the closed end of the wire binding ring, which is used to unbind the tracheal stent; the tracheal stent conveyor and system are easy to release and accurately positioned.

The utility model relates to a gradient degradable tracheal stent for expanding tracheal stenosis and blocking fistula. The gradient degradable tracheal stent comprises integral woven structures (I) located on the two sides of the stent and a local woven structure (II) located in the center of the stent. The integral woven structure (I) and the local woven structure (II) are both formed by weaving degradable metal wires (1) and degradable polymer fibers (2) in a mixed mode. Compared with a covered woven stent, the tracheal stent has more accurate mechanical enhancement and plugging effects, the tracheal stent has gradient degradation speed after being implanted, the maximum mechanical property and plugging effect are provided in the initial stage of treatment, the mechanical supporting effect and the plugging effect are gradually reduced along with tracheal healing, and the tracheal stent has the advantages of being good in sealing effect and good in sealing effect. The stent can be completely degraded and does not need to be taken out again through an operation, the pain of a patient is relieved, and good application prospects are achieved.

The invention relates to a multi-layer bionic trachea repair graft and a preparation method thereof. The preparation method comprises the following steps: printing an electric writing net by using polycaprolactone particles; printing a planar caramel stent by using the moldable caramel raw material, and curling to form a C-shaped caramel stent; a C-type caramel stent is coated with polycaprolactone coating liquid, an electric writing net is attached to the inner side of the C-type caramel stent, the C-type caramel stent is dissolved by soaking the C-type caramel stent in distilled water, a C-type elastic hollow stent is formed, and therefore the nested multi-layer bionic tracheal stent is obtained. Mixing the primary cartilage cells and the human gingival mesenchymal stem cells, and inoculating the mixture to an electric writing net for culture; decellularizing the scaffold; and mixing the autologous cartilage particles with the allogenic adipose-derived mesenchymal stem cells, and injecting the mixture into a hollow pipeline of the C-shaped elastic hollow stent to obtain the multi-layer bionic trachea repair transplant. The multi-layer structure stent disclosed by the invention has biocompatibility and mechanical properties, promotes long-term survival and functional recovery of cells, improves vascularization and epithelialization effects, and has the potential of being converted into clinical application.

The utility model provides a delivery device for an iron-based alloy degradable endotracheal stent, including a mesh endotracheal stent and a stent delivery system; the mesh endotracheal stent includes an iron-based alloy matrix and a degradable polyester coated on the inner and outer surfaces of the stent, and the degradable polyester covers the stent surface in the form of a coating; the delivery system includes an outer sheath tube, an inner sheath tube and a guide wire; the outer sheath tube includes an outer sheath tube front end and an outer sheath tube tail end, the inner sheath tube is a pipeline structure, including a stent groove, an inner sheath tube plastic part, an inner sheath tube metal part, an inner sheath tube water injection port and a tube core, the tube core includes a fixing cap and a steel wire, one end of the steel wire is tightly connected to the plastic fixing cap, and the other end is inserted into the inner sheath tube through the front end of the inner sheath tube; the guide wire is a metal wire inserted through the front end of the inner sheath tube after the tube core is pulled out. The utility model degrades quickly in vivo, is firmly fixed, is not easy to shift, and is convenient for positioning.

The invention relates to a double-layer nanofiber bionic tracheal stent with a three-dimensional structure as well as preparation and application of the double-layer nanofiber bionic tracheal stent. The double-layer nanofiber bionic tracheal stent is good in repeatability and excellent in personalized customization performance, and a tracheal transplantation substitute can be provided for repair and regeneration of tracheal tissues after tracheal damage is cut off.

The present invention provides a delivery system of a C-shaped iron-based alloy degradable endotracheal stent, including a C-shaped mesh endotracheal stent and a stent delivery system; the delivery system includes an outer sheath tube, an inner sheath tube and a core structure; the inner sheath tube is a pipeline structure passing through the inside of the outer sheath tube, including a stent groove, a tail, and an inner sheath tube water injection port, and the stent groove includes a front end and a balloon; the tail is provided with a balloon water injection hole, and the balloon water injection hole is communicated with the inner sheath tube water injection port and the balloon respectively; the core structure includes a guide wire and an inner sheath tube core, the inner sheath tube core is a blocking structure for blocking the inner sheath tube water injection port, and the inner sheath tube core end is provided with a core water injection hole; the guide wire is a metal wire with a soft head at the front end, and the guide wire passes through the inner sheath tube after the inner sheath tube core is pulled out. The present invention degrades quickly in vivo, is firmly fixed, is not easy to shift, and is convenient for positioning.

The invention belongs to the technical field of medical instruments, and discloses a method for constructing a tracheal stent model, the tracheal stent model and related equipment, and the method comprises the following steps: obtaining a tracheal scanning image containing a defect part and an adjacent healthy part; according to the trachea scanning image, the distance between the top cartilage ring and the bottom cartilage ring adjacent to the trachea defect part and the trachea longitudinal change trend of the healthy part are obtained. According to the distance between the top cartilage ring and the bottom cartilage ring and the longitudinal change trend of the trachea, a first model in a C-shaped cylindrical ring shape is constructed; and smoothing the surface of the inner cavity of the first model to obtain a second model. The second model is hollowed out according to a preset hollowed-out area, and the tracheal stent model is obtained. According to the method, the tracheal stent model which is similar to the original form of the tracheal defect part and is light in weight and uniform in strength can be obtained, and personalized tracheal stent models can be provided for different patients.