19 results about "Tracheal stent" patented technology

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 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 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 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 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 invention provides a degradable sectional type tracheal stent which is of a sectional type modular connection combined structure and comprises stent modules, sliding parts, a locking mechanism and a splicing structure, every two stent modules are connected in a sliding mode through the sliding parts to form a stent unit with the axial projection being in a C shape or a round shape, and the locking mechanism is connected with the splicing structure through the sliding parts. The locking mechanisms are used for limiting and locking every two support modules, axial detachable splicing combination between every two support units is achieved through the splicing structures, and the support is simple in structure, stable in connection and easy to operate; the connecting number of the stent modules can be adjusted according to the size of a trachea supporting channel, and the splicing number of the stent units can be flexibly adjusted according to the length of trachea stenosis to meet the requirements of different patients; the system further comprises visual identifications arranged on the stent modules, the visual identifications fade layer by layer along with the degradation progress and present different colors, the degradation state of the stent can be visually judged through endoscope or iconography inspection, and therefore the function that the degradation progress of the stent can be monitored is achieved.

The present application belongs to the technical field of medical devices, and relates to a double-helix gradient modulus tracheal stent and a preparation method thereof. The tracheal stent comprises a tubular stent body, and the stent body adopts a double-helix gradient modulus structure. The spiral lines of the first spiral layer and the second spiral layer are opposite in rotation direction and different in elastic modulus gradient, and the interval between adjacent spiral lines of the first spiral layer gradually changes along the axial direction. Therefore, when a high airflow is generated by sputum coughing of a human body, the stent body has a dynamic deformation ability of non-uniform radial contraction and expansion along the axial direction of the stent body, can form a wave-like support channel with turbulent and irregular fluid movement, and can significantly improve the postoperative ventilation and sputum discharge function of a patient in the case of no native tracheal mucociliary structure for self-cleaning and defense. The overall structure of the present application is simple, the manufacturing process is controllable and repeatable, and the present application has a good industrial production prospect.