30 results about "Fibrous ring" patented technology

The invention relates to the technical field of medical instruments, and discloses a precise positioning fibrous ring stitching instrument and an operation method thereof.The precise positioning fibrous ring stitching instrument comprises a shell, a rack is arranged at the bottom end of the interior of the shell, a gear is connected to the tooth end of the rack in a meshed mode, a first rotating shaft is fixedly arranged on one side of the gear, and the outer wall of the first rotating shaft is rotationally connected to the outer wall of the shell; the first rotating shaft penetrates through the shell and is fixedly provided with a knob, the knob is located on the side wall of the shell, a first puncture needle is arranged on the side wall of the shell, a thread guide needle is fixedly arranged at one end of the rack, the outer wall of the thread guide needle is arranged in the first puncture needle, and a sewing mechanism is arranged in the second puncture needle and the shell. A shearing mechanism is arranged in the second sliding groove of the shell. The fixed handle and the movable handle are operated through the suturing mechanism, the clamping head and the clamping block are used for conveniently clamping and processing the suturing line, complexity of traditional suturing operation is simplified, suturing efficiency is improved, and the problem that suturing operation is tedious is solved.

The application discloses a kind of annulus fibrosus repair devices, including degradable elastic constraint bag and filling in it.Filling in the space of elastic constraint bag includes positioning space, support space and limiting space, and filling includes first filling and second filling.First filling is located in positioning space and is fixed in shape to form positioning part, located outside the annulus fibrosus break, for conveying positioning.Elastic constraint bag corresponding part in support space and limiting space can be folded after being filled into the annulus fibrosus break, then second filling part flows into support space and limiting space and forms support part and limiting part respectively after coagulation.Elastic constraint bag corresponding part in support space can be elastically deformed to adapt to the shape of annulus fibrosus break under the filling of second filling.Limiting part is located inside the annulus fibrosus break, with limiting surface abutting with the inner wall around the annulus fibrosus break, for preventing annulus fibrosus repair device from being extruded from the annulus fibrosus break by nucleus pulposus.

The present invention discloses an annulus fibrosus suture device, belonging to the technical field of medical devices, and solves the technical problems of long suture time and poor adaptability of the annulus fibrosus suture device in the prior art. It includes a suture needle assembly, and the suture needle assembly includes a piercing member and a clamping seat; the piercing member includes a shuttle and a push rod, a grasping rod, a piercing needle and a sheath tube which are sleeved from the inside to the outside in sequence, and the shuttle is used for clamping the suture; a suture needle control assembly, which is used to drive the piercing member to penetrate the suture from the first side of the material to the second side, and then penetrate from the second side at another position of the material to the first side; the clamping seat is used to receive the shuttle on the second side of the material; a handle housing, which is used to fix the suture needle assembly and the suture needle control assembly, and includes a fixing part and a movable part movably connected to the fixing part. The annulus fibrosus suture device of the present invention can meet more demand scenarios, improve the suture success rate or shorten the suture time.

A solid-liquid composite multifunctional bionic intervertebral disc belongs to the technical field of bionic intervertebral discs. The upper end plate assembly, core layer and lower end plate assembly of the present invention are arranged in sequence from top to bottom and fixedly connected; the upper end plate assembly and the lower end plate assembly have the same structure, and the end plates are provided with coatings, nail tooth groups and micropore groups; the core layer is composed of a nucleus pulposus, a transition ring and four fibrous rings arranged and fixedly connected from the inside to the outside, and the nucleus pulposus is made of a low-acyl gel and agarose of a liquid core injected into a cellulose sponge of a solid skeleton of a soft support structure; the surfaces of the transition ring and the four fibrous rings are coated with collagen fibers, and the slopes of the collagen fibers of each two layers are staggered with each other; the present invention has cushioning and shock absorption, dynamic anti-fatigue functions, good spinal motion matching and anti-compression and anti-shear mechanical properties.

The invention discloses a near end plate fiber ring stitching instrument, and belongs to the technical field of medical instruments. The device comprises a shell, a puncture needle component, a push and guide needle component, a bone anchor component, a slide way rotating shaft component and a reversing rotating handle component are arranged in the shell, and the reversing rotating handle component partially penetrates through the shell and is exposed; the puncture needle component and the push and guide needle component are positioned on the same straight line, are restrained on a slideway of the slideway rotating shaft component, and have degrees of freedom of approaching and leaving from each other; a sliding gear is arranged on the reversing rotating handle part, a gear A is arranged on the bone anchor part, a gear B is arranged at the tail end of the slideway rotating shaft part, and the sliding gear can be selectively matched with the gear A or the gear B. The umbrella-shaped structure made of rubber and located at the head of the suture can be pressed in the fiber ring after being opened, and the problem that a transverse supporting structure is prone to disengagement is solved; by means of the titanium alloy bone anchor with the tantalum coating, the problem that the damaged near-end-plate area of the fiber ring is difficult to suture and repair is solved, and meanwhile the fusion repair process is accelerated.

1. The name of the design product: handle (annulus fibrosus suture device). 2. The use of the design product: for lumbar intervertebral disc annulus fibrosus suture device handle. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The fiber ring stitching instrument comprises a handheld part, a rod body coaxially connected with the handheld part and a U-shaped hook body connected to the far end of the rod body, the back side wall and the abdomen side wall of the handheld part, the back side wall and the abdomen side wall of the rod body and the back side wall and the abdomen side wall of the U-shaped hook body are provided with a continuously-penetrating U-shaped groove and a circular channel respectively, and the U-shaped groove forms a U-shaped opening in the end of the U-shaped hook body. A penetrating hole is formed in the end of the U-shaped hook body, a flexible ejector rod is arranged in the circular channel, when the flexible ejector rod is pressed, the far end of the flexible ejector rod can push out a line knot or an anchor rod embedded in the end of the U-shaped hook body, the line is wound in the U-shaped groove, one end of the line is knotted or connected with the anchor rod and embedded in the tip end of the U-shaped hook body, and the other end of the line is located at the top end of the handheld part. After being tensioned, the nut is fixed by a nut at the top end of the handheld part; the device is used for a suture mode of threading from the inside to the outside of the fiberoptic ring crevasse under a spine endoscope, is simple to operate, and can obviously reduce the probability of false healing of the fiberoptic ring.

The invention discloses an intervertebral disc annulus fibrosus repairing material, a scaffold and application of the intervertebral disc annulus fibrosus repairing material and the scaffold. The intervertebral disc annulus fibrosus repairing material comprises magnesium-silicon nanofibers, tannic acid (TA) and transforming growth factor beta (TGF-beta), and the magnesium-silicon nanofibers comprise self-assembled magnesium-silicon-oxygen nanosheets; the magnesium-silicon-oxygen nanosheet is wrapped by tannic acid; the TGF-beta is connected to the tannic acid through a reversible chemical bond. According to the present invention, the immune microenvironment is adjusted so as to enhance the extracellular matrix (ECM) expression of fibrous ring stem cells (AFSCs);

The present invention discloses an annulus fibrosus suturing device, belonging to the technical field of medical devices, and solving the technical problems of long suturing time and poor adaptability of the annulus fibrosus suturing device in the prior art. It includes a suture needle assembly, and the suture needle assembly includes a puncturing member and a clamping seat; the puncturing member includes a shuttle, and a push rod, a grasping rod, a puncture needle and a sheath tube which are sleeved from the inside to the outside, and the shuttle is used for clamping a suture; a suture needle control assembly, which is used for enabling the puncturing member to drive the suture to penetrate from the first side of the material to the second side, and then penetrate from the second side at another position of the material to the first side; the clamping seat is used for receiving the shuttle on the second side of the material; a handle housing, which is used for fixing the suture needle assembly and the suture needle control assembly, and includes a fixing part and a movable part movably connected to the fixing part. The annulus fibrosus suturing device of the present invention can meet more demand scenarios, improve the suture success rate or shorten the suturing time.

The invention provides a fibrous ring stitching instrument, and belongs to the technical field of medical instruments. The clamp-shaped suture front end comprises a pair of arc-shaped forceps claws which are rotationally connected through a hinge part, a sharp part is arranged at the front end of each arc-shaped forceps claw, the two sharp parts are provided with matched diagonal planes, and a lead hole communicated with the diagonal planes and the rear ends of the arc-shaped forceps claws is formed in each arc-shaped forceps claw. The pair of arc-shaped clamp claws has an unfolded state and a closed state, and in the closed state, the two sharp parts are aligned and abut against each other through the diagonal planes, and the lead holes are in butt joint, so that the pair of arc-shaped clamp claws jointly define a complete annular structure; in the unfolded state, the two sharp portions are separated from each other. The technical problems that the threading success rate is low and the operation efficiency is affected due to the defects of an existing fibrous ring suturing means can be solved.

The invention is suitable for the technical field of cleaning equipment, and provides a surgical instrument cleaning device based on fibrous ring suture surgery and a using method thereof.The cleaning device comprises a mounting frame and a cleaning assembly, and the cleaning assembly comprises a cleaning frame, a side plate, an adjusting mechanism, a first cleaning mechanism, a second cleaning mechanism and a water spraying mechanism; the water spraying mechanism comprises a shear fork mechanism and a water hose, the cleaning frame comprises a first side frame and a second side frame which define a rectangle, the conveying rollers comprise a first rotating roller and a second rotating roller which are coaxially arranged, and the adjusting mechanism comprises a threaded rod and a third stepping motor. According to the surgical instrument cleaning device based on the fibrous ring suture operation, by arranging the mounting frame and the cleaning assembly, when the number of surgical instruments to be cleaned is increased, the cleaning frame is adjusted to be widened through the adjusting mechanism, so that the conveying rollers are lengthened, the conveying belt is widened, the number of the conveyed and cleaned surgical instruments is increased, and the cleaning efficiency is improved; and the water spraying range of the water spraying mechanism can be adaptively adjusted.

The invention provides an energy output control method and system based on a composite catheter. The energy output control method comprises the steps that a radio frequency electrode is pushed to the far end of the composite catheter; radio frequency energy is output to the target intervertebral disc protrusion tissue through the radio frequency electrode, so that the size of the target intervertebral disc protrusion tissue is reduced, and a cavity is formed; normal saline is injected into the cavity, and the far end of the optical fiber is pushed to the cavity through an optical fiber channel in the composite catheter; laser energy is output to the fiber ring near the cavity through the optical fiber to solidify the fiber ring near the cavity. The cavity formed by the target intervertebral disc protrusion tissue can separate the nerve root from the target intervertebral disc which is not ablated, so that the compression of the target intervertebral disc protrusion tissue on the nerve root can be obviously reduced; the heat effect of the laser can be utilized to act on the fibrous ring of the collagen, so that the fibrous ring of the collagen is shrunk and thickened, equivalently, the fibrous ring is reinforced, and the recurrence of the target intervertebral disc protrusion is effectively prevented.

The utility model relates to an intervertebral disc fibrous ring opening device which comprises a driving part and a fibrous ring opening assembly arranged at one end of the driving part. The fiber ring opening assembly comprises a fiber ring containing part and a fiber ring fixing part arranged in the fiber ring containing part, one end of the fiber ring containing part and one end of the fiber ring fixing part are both fixedly connected with the driving end of the driving piece, and the other end of the fiber ring fixing part extends out of the fiber ring containing part. According to the intervertebral disc fibrous ring opening device, the fibrous ring can be fixed through the fibrous ring fixing part, so that sliding between the intervertebral disc fibrous ring opening device and the fibrous ring can be avoided, and meanwhile the intervertebral disc fibrous ring opening device can be fixed through the fibrous ring opening structure formed by the fibrous ring containing part and the fibrous ring fixing part. According to the intervertebral disc opening device, the intervertebral disc fibrous ring is opened, so that a regular opening is obtained, the regular opening is not prone to damaging surrounding blood vessels, the visual field under an endoscope is clear, and follow-up operation in the intervertebral disc is facilitated.

The invention relates to the field of fiber ring suturing, in particular to a fiber ring suturing instrument which comprises a fixing shell, a suturing assembly is arranged in the fixing shell, a holding assembly is arranged on the outer wall of one end of the fixing shell, an adjusting assembly is arranged in the holding assembly, the suturing assembly comprises two circular grooves, and sliding grooves are formed in the inner walls of the circular grooves; a circular groove is formed in the surface of the fixing block, a fixing block is clamped in the circular groove, one side of the fixing block is fixedly connected with a nail head, a clamping groove is formed in the surface of the nail head, an extrusion block is clamped in the clamping groove, and a circular hole is formed in the surface of the fixing block. The two fixing blocks drive the two nail heads to be close to each other, crevasses in the fiber rings are pressed to be attached to each other, the nail heads can flexibly move in the circular grooves by means of the elasticity of the rubber ropes and the structure of the circular grooves, and therefore precise suturing of the fiber rings is achieved, and the suturing efficiency and quality are improved.

The invention relates to an intervertebral disc fibrous ring tissue engineering repair material and application thereof, and aims to solve the problems of difficult fibrous ring repair, high recurrence rate, complicated operation and the like in the prior art. The repair material provided by the invention has excellent biocompatibility, superelasticity and shape memory effect, and can effectively promote regeneration and repair of the annulus fibrosus, significantly improve the surgical effect and reduce postoperative recurrence. The repairing material comprises one or more compounds of collagen, acellular matrix protein, gelatin polylactic acid and expanded polytetrafluoroethylene. The materials act together to support the growth of a plurality of cells such as chondrocytes, fibroblasts and mesenchymal stem cells, provide extremely high mechanical stability and biological activity, and are suitable for being used in a complex living body environment. Through specific chemical and physical treatment processes, the composite materials are assembled into the intervertebral disc fibrous ring tissue engineering repair material capable of supporting and repairing damaged intervertebral discs. The repair material and method provide a new solution for treatment of intervertebral disc degenerative diseases, and have wide application prospects and clinical values.

In accordance with at least one aspect of this disclosure, a disc replacement implant includes, a first endplate configured to engage a vertebral endplate of a first vertebra adjacent an intervertebral space, a second endplate configured to engage a vertebral endplate of a second vertebra opposite the first end plate in the intervertebral space, a core between the first and second endplates, and an annulus surrounding the core and connecting a perimeter of the first endplate to a perimeter of the second end plate. In embodiments, the annulus can include a portion that extends inwardly between the first and second core plates to the spacer.

The invention relates to the technical field of medical instruments, in particular to a vertebral plate non-fusion fixing device which comprises a vertebral plate fixing body. The upper supporting surface of the vertebral plate fixing main body is also provided with a backward movement prevention bulge; the anti-backward-movement bulge is of a triangular structure and is matched with the triangular three-dimensional space at the lower dome position of the vertebral plate in shape; and the backward movement prevention bulge is in direct contact with the lower dome of the vertebral plate so as to prevent the fixing device from moving towards the vertebral body of the spine. The vertebral plate non-fusion fixing device is installed at the vertebral plate gap position of adjacent vertebral bodies in the spine posterior non-fusion operation in a matched mode, the vertebral plate gap is expanded and fixed, and the folded posterior longitudinal ligament and the fibrous ring are stretched, so that the spinal canal stenosis degree is reduced, meanwhile, the upper diameter and the lower diameter of intervertebral foramen of the same section are increased, the nerve root canal cross section area is enlarged, and the spinal canal stenosis degree is improved. The nerve root stress is relieved. The fixing device can further enhance the stability of the spine at the segment, and meanwhile the spine motion range of the segment is reserved.

The invention discloses a spinal endoscope fiber ring stitching instrument, relates to the technical field of fiber ring stitching instrument equipment, and provides the following scheme that the spinal endoscope fiber ring stitching instrument comprises a stitching instrument mechanism, the front end of the stitching instrument mechanism is flexibly connected with a stitching instrument tip, and a needle tube steering mechanism is arranged at the rear end of the stitching instrument tip; a suture thread anti-falling sleeve is arranged in the front end of the stitching instrument tip, the stitching instrument mechanism comprises a stitching instrument handle, a thread outlet needle tube and a thread return needle tube, the thread outlet needle tube and the thread return needle tube are fixedly connected to the end face of the front end of the stitching instrument handle, and the thread outlet needle tube is located above the thread return needle tube. The straight needle of the stitching instrument is provided with the suture clamping structure, so that the suture extending into the straight needle from the head end of the bent needle is prevented from falling off, secondary threading is prevented, and the difficulty of stitching operation is reduced. A straight needle and a curved needle of the fiber ring stitching instrument are arranged to be movable, and a connecting mechanism for adjusting the bending angle of the straight needle and the curved needle is connected between the straight needle and the curved needle and the stitching instrument.

The utility model provides a fibrous ring stitching instrument and relates to the technical field of medical instruments, the stitching instrument comprises a handle shell, a stitching assembly, a transmission assembly and a driving assembly, and the transmission assembly is located in the handle shell and is connected with the driving assembly to drive the stitching assembly. The suturing assembly comprises a needle tube, a puncture needle and a thread needle, the needle tube is fixed at the front end of the handle shell, and fixing plates are arranged at the tail ends of the puncture needle and the thread needle respectively and can slide in the handle shell. The driving assembly comprises a trigger and a side key, the trigger controls the needle to move, the side key controls the puncture needle to move, and therefore puncture and suture operation is achieved. The transmission assembly comprises a side sliding block, a duplicate gear, a transmission rack and a driving rack, the side key is used for driving the side sliding block to slide downwards and driving the puncture needle, and the trigger controls the needle to penetrate. According to the utility model, the convenience of one-hand operation is realized, the man-machine engineering design is optimized, the operation steps are simplified, and the device is suitable for repairing the annulus fibrosus in minimally invasive surgery, and has higher clinical application value.

The invention provides an intervertebral disc fibrous ring repairing device, and belongs to the technical field of medical instruments. A round head wire and a mesh; the rivet wire clamping handle is located on the surface of the rivet handle; the rivet is fixedly connected with one side end of the rivet handle; the rivet head is arranged on one side of the rivet; the rivet head hole is formed in the circumferential surface of the rivet head; through the matched design of the rivet and the rivet head, it is ensured that the mesh is accurately anchored to the edge of a vertebral end plate during implantation, displacement or looseness is avoided, the mesh is made of a PET material, biocompatibility and mechanical strength are achieved, fiber ring damage can be effectively closed, and nucleus pulposus is prevented from protruding again. The mesh is uniformly stressed through linkage fixation of the four-corner flat round-head lines and the round-head lines, local stress concentration is avoided, meanwhile, a doctor can accurately control the implantation depth through the scale line design of the rivet handle, and operation errors are reduced.

The present disclosure relates to an artificial intervertebral disc, comprising an upper endplate configured to be connected with an upper vertebral body, a lower endplate configured to be connected with a lower vertebral body, and an elastic body arranged between the upper endplate and the lower endplate, wherein the elastic body comprises a multi-layer structure arranged in a top-down manner, each layer has a ring-shaped cross section, the ring-shaped cross section of each layer is composed of a plurality of n-shaped units, two adjacent edges of two adjacent n-shaped units are connected at an inner ring end of the ring-shaped cross section, and a longitudinal cross section of each layer also has an n-shaped structure, wherein the n-shaped structures of two adjacent upper and lower layers are arranged in a top-down alignment manner, and openings thereof face the inner ring and are connected with each other at the inner ring position; and a balloon having elasticity and arranged between the upper endplate and the lower endplate in a top-down direction and arranged in the ring-shaped cross section of the elastic body in a horizontal direction. By arranging the elastic body and the structure of the balloon, the cushioning and shock-absorbing functions of the annulus fibrosus and the nucleus pulposus of the human intervertebral disc are simulated, the artificial intervertebral disc has similar performance to the original human tissue, and the artificial intervertebral disc is easy to operate.

The invention relates to the technical field of medical apparatus and instruments, and provides a fibrous ring stitching instrument capable of performing continuous stitching and a use method.The stitching instrument comprises a handle assembly, an outer tube, an inner tube, a stitching needle and a pushing mechanism; one end of the outer tube is connected with the handle assembly, the other end of the outer tube is connected with the suture needle, and the suture needle is provided with an inner cavity; the inner tube is arranged in the outer tube and extends into an inner cavity of the suture needle, and a first cavity is formed between the inner tube and the outer tube; a first winding bar and a second winding bar are sequentially contained in an inner cavity of the suture needle and the inner tube in the axial direction away from the suture needle, the pushing mechanism is arranged in the handle assembly and comprises a pushing head operably stretching out of the handle assembly and a pushing rod connected with the pushing head, and the pushing rod stretches into the inner tube. According to the scheme, all the steps can be completed in two times of puncture only by operating the pushing mechanism, the suture process is greatly simplified, and the operation time is shortened.

The utility model discloses a knotting-free fiber ring stitching instrument convenient and fast to operate, and belongs to the technical field of fiber ring stitching instruments. A first stitching needle is installed at the outer end of a guide piece on a telescopic rod, a second stitching needle is installed at one end of the first stitching needle, and a button is installed at the outer end of a guide groove and controls a driving piece; the guide part, the first suture needle and the second suture needle are driven by pushing of the driving part to conduct automatic expansion and contraction, the functions of automatic suture and limiting expansion and contraction are achieved, and the expansion and contraction stability of the first suture needle and the second suture needle is improved; a limiting plate covers the material storage part, a sealing plate is installed on one side of the stitching instrument body and sleeved with a second connecting sleeve, a guiding part is installed on the second connecting sleeve, a guiding groove is formed in the guiding part, and a suture line enters and exits the material storage part and is led out of the guiding groove in the guiding part through the limiting plate to guide a stitching material. And the problem of knotting of the sewing material is effectively prevented.

The invention provides a single-line lumbar intervertebral disc fibrous ring crevasse suture needle convenient for recovering a suture needle, and belongs to the technical field of medical apparatuses and instruments. According to the suture needle, through the structural design that the suture needle is in a J shape in a natural state, has elasticity, is in a linear shape under the action of external force and naturally rebounds to be in a J shape after the external force is eliminated, the problems that in the prior art, when a medical worker uses two needle pushing rods, a non-magnetic needle pushing rod and a magnetic needle pushing rod are likely to be confused, and use is not convenient enough are solved. The suture needle comprises a screw head, a screw sleeve rod, a suture needle, a suture needle sleeve, a first needle pushing rod, a suture line and a needle holder, the suture needle comprises a needle tail and a needle tip, the suture needle is J-shaped in a natural state, and the needle tip is located at the hook end; the suture needle has elasticity, is in a linear shape under the action of external force, and naturally rebounds to be in a J shape after the external force is eliminated. And the needle holder is used for clamping the needle tip under the visual field of the endoscope.

The utility model relates to a fibrous ring stitching instrument which comprises a puncture stitching assembly and a handle percussion assembly. The puncture suture assembly comprises a puncture needle, a puncture push rod and a suture line, the puncture needle is of a hollow structure, a needle head is arranged at one end of the puncture needle, the puncture push rod is slidably arranged in the puncture needle and provided with a line storage groove, and two line knots of the suture line are located in the line storage groove and the head of the puncture push rod respectively. The handle percussion assembly comprises a handle shell, a percussion trigger, a limiting shifting button and a puncture push block, and the percussion trigger is connected with the puncture push block and rotates to drive the puncture push block to slide; the limiting shifting button can slide up and down along the handle shell to control the limiting position of the puncture push block, and therefore switching of the initial position, the first-time percussion position and the second-time percussion position of the puncture suturing assembly is achieved. Through the design of the spring pieces and the flexible damping blocks, the limiting sliding grooves and the side sliding blocks slide stably, and operation is stable. According to the utility model, one-hand operation is realized, the fibrous ring suturing process is simplified, and the fibrous ring suturing device has the characteristics of convenience in operation, accuracy in positioning, stability and reliability, is favorable for improving the operation efficiency, and is suitable for various minimally invasive operation scenes.

The invention discloses an automobile digital evaluation model with 95th percentile male signs of Chinese signs, which performs analog simulation on human tissues through various finite element grid units, endows different material attributes, optimizes detailed human anatomical structural characteristics, splices different tissue structures, and improves the evaluation accuracy. And obtaining the model. The invention further discloses a construction method of the model, which comprises the following steps of: constructing a human body geometric model by collecting CT data of signs of 95th percent male in China, forming hexahedral unit structures such as heart and sacrum through finite element mesh division, correcting physiological curvature of the spine, constructing tissues such as intervertebral disc and fibrous ring, forming a standing posture model through tendon connection, and constructing a human body model. According to the sitting posture angle of the passenger, the posture is adjusted, muscle grids are optimized, and finally, all tissue structures are integrated to form the passenger posture automobile digital evaluation model with the signs of the 95th percentile male in China. The method has wide application value.

A bionic intervertebral disc with mechanical anisotropy includes an upper end plate, a core and a lower end plate. The core includes outer fibrous rings, a middle transition zone and an inner nucleus pulposus. The fibrous rings comprise collagen fiber sheets and collagen fibers, each of the collagen fibers is attached to a surface of a corresponding one of the collagen fiber sheets and arranged at an inclination angle, ones of the collagen fibers which are on every two adjacent layers of the collagen fiber sheets are arranged crosswise with each other. A honeycomb meshing size of a portion, which is located at a fibrous-ring transition zone, of the honeycomb structure is smaller and more compact, and a honeycomb meshing size of a portion, which is located at a nucleus pulposus transition zone, of the honeycomb structure is larger and sparser.

The utility model relates to medical education field especially, especially relates to a teaching lumbar puncture model, including spine component, contains a plurality of vertebra model and intervertebral piece, the intervertebral piece includes each other's connection nucleus pulposus model, annulus fibrosus model and yellow ligament model, bone component contains the sacrum model and ilium model connected, and is connected with spine component, ligament component contains interspinal ligament, muscle component is constituted by lower muscle model and upper muscle model, skin component covers on upper muscle model, and is equipped with the puncture hole of being able to penetrate in the target area corresponding position, the puncture hole penetrates upper muscle model, interspinal ligament and yellow ligament model in proper order, fixed component is used for supporting and fixed muscle component, the vertebra model, bone component adopts hard material to make, the intervertebral piece, ligament component, muscle component, skin component adopt flexible material to make. Its solved the technical problem that the simulation degree of existing lumbar puncture model is insufficient.

The application discloses a fiber ring suture device under a spinal endoscope, and relates to the technical field of fiber ring suture device equipment, and proposes the following scheme, which comprises a suture device mechanism, the front end of the suture device mechanism is connected with a suture device tip in a flexible manner, a needle tube turning mechanism is arranged at the rear end of the suture device tip, a suture thread anti-falling sleeve is arranged in the front end of the suture device tip, the suture device mechanism comprises a suture device handle, a wire outlet needle tube and a wire return needle tube are fixedly connected to the front end face of the suture device handle, and the wire outlet needle tube is located above the wire return needle tube. The suture thread clamping structure is arranged on the straight needle of the suture device, so that the suture thread extending from the bent needle head end to the straight needle can be prevented from falling off, secondary threading can be prevented, and the difficulty of suture operation is reduced. The straight needle and the bent needle part of the fiber ring suture device are arranged to be movable, and a connecting mechanism for adjusting the bending angles of the straight needle and the bent needle is connected between the straight needle and the bent needle and the suture device.

The application relates to a biological 3D printing cartilage-fiber-epithelium integrated tissue engineering trachea and a construction method and application thereof. First, cartilage specific biological ink is prepared by wrapping cartilage cells with cartilage tissue specific hydrogel; fiber specific biological ink is prepared by wrapping fibroblasts with fiber tissue specific hydrogel; epithelium specific biological ink is prepared by wrapping epithelial cells with matrix hydrogel; then, through a step-by-step assembly strategy, a C-shaped cartilage ring and a fiber ring are alternately printed and a ring-shaped tubular structure is formed by using a double-needle extrusion type biological 3D printing technology, and then a layer of epithelium specific biological ink is attached in the lumen to construct a tubular structure of cartilage-fiber-epithelium multi-tissue composite; it is verified that after being implanted subcutaneously in a naked mouse for 8 weeks, a relatively mature cartilage-vascularized fiber-epithelium tissue composite tissue engineering trachea can be regenerated, and a clinically transformable strategy is provided for the regeneration treatment of complex tracheal injury.