36 results about "Arthroscopy" patented technology

The utility model discloses needle grasping forceps under an arthroscope, which belongs to the technical field of needle grasping forceps and comprises a forceps body, a fixed forceps rod is arranged at one end of the forceps body, an extension rod is arranged at the other end of the forceps body, a fixed forceps and a movable forceps are respectively arranged at the tail end of the extension rod, a movable groove is arranged on the inner side of the middle of the forceps body, and a movable forceps rod is arranged in the movable groove. A clamping plate and a positioning plate are arranged on the opposite sides of the fixed forceps rod and the movable forceps rod, a clamping groove is formed in the bottom of the clamping plate, a clamping block is arranged at one end of the positioning plate, a pressing block is arranged at the top of the other end of the positioning plate, and a reset spring is arranged at the bottom of the pressing block. The clamping grooves in the clamping plate are matched with the clamping blocks on the positioning plate to form a clamping state, so that the fixed forceps rod and the movable forceps rod are clamped and positioned, the positioning of the movable forceps is realized, a certain labor-saving purpose is achieved without continuously applying force by a surgeon during use, and better operation of the surgeon is facilitated.

The utility model discloses an arthroscopic surgery auxiliary device which comprises a fixing frame, a supporting plate, an arthroscopic surgery auxiliary device body and an arthroscopic surgery auxiliary device body, and the top of the fixing frame is fixedly connected with the supporting plate. The adjusting assembly comprises an adjusting plate, and the adjusting plate is movably and rotatably connected to the exterior of the supporting plate; and the supporting assembly comprises a fixing frame. According to the leg bending supporting device, firstly, the device is placed at a proper position, then the leg is placed at the top of the supporting plate, when the joint supporting angle needs to be adjusted, the adjusting rod is rotated to ascend and descend along the internal thread of the rotary disc, the adjusting plate can be synchronously driven to rotate outside the supporting plate, and finally the angle of the leg bending supporting is adjusted through the adjusting plate. And when the supporting height of the whole device needs to be adjusted, the threaded rod is rotated, so that the sliding block ascends and descends in the fixing frame along an external thread of the threaded rod, and finally the effect of adjusting the height of the whole device is achieved.

The application discloses a joint mirror surgery reusable metal working sleeve, relates to the technical field of medical devices, and has the technical scheme as follows: a needle body, a handle head one and a pipe body are included; the bottom of the handle head one is detachably connected with one end of the pipe body; the middle part of the handle head one is provided with a movable channel one in the height direction; the movable channel one is connected with the pipe body; a control gate valve is arranged on the outer side wall of the handle head one; the control gate valve is arranged in the movable channel one by penetrating the side wall thickness of the handle head one; a water inlet pipe is detachably connected with the outer side wall of the end of the pipe body close to the handle head one; a camera is arranged on the inner side wall of the end of the pipe body away from the handle head one; a controller is arranged on the end of the pipe body close to the handle head one; and the controller is connected with the camera by wires. In the application, a plurality of stainless steel pipes are connected in succession from top to bottom by socket connection, so that the pipe body is formed; and the end of the stainless steel pipe is moved in a movable channel two in the previous stainless steel pipe, so that the length of the pipe body is adjusted.

Exemplary systems and methods encompass suture knot tools and suture knot tools pre-loaded with sutures for use in tendon repair and other surgical procedures. Related methods may include forming a nail knot between a suture and a tissue of a patient during a surgical procedure by drawing tissue into a port sleeve of an arthroscopic system, moving the port sleeve relative to a free end portion of the tissue and a nail knot cinch of a suture, to allow the nail knot cinch of the suture to contact the free end portion of the tissue; and tightening the nail knot cinch of the suture about the free end portion of the tissue, so as to form the nail knot with the suture and the tissue.

Disclosed are computer visual guidance systems for guiding surgeons through arthroscopic debridement of bony pathologies, including by automatically generating annotations relating to characteristics of bony pathology in an image. The annotation may be generated in accordance with a determination as to whether a femoral head of the bony pathology is endospherical or exospherical. The annotation may be generated in accordance with a mathematical model created based on anatomies of subjects other than the patient. Further disclosed is a user interfaces for guiding a surgeon through arthroscopic debridement of a bony pathology, wherein intraoperative images are displayed simultaneously with a preoperative plan comprising interactive three-dimensional models of an anatomical feature of a patient. Further disclosed is a user interface for guiding a physician in categorizing images of a patient, wherein the interface comprises an image viewing window and an interactive checklist for different image categories to be captured.

The application provides an arthroscopic access cannula, and relates to the technical field of medical devices, which comprises an outer cannula and an inner tube installed in the middle part of the inner side of the outer cannula, the inner tube is provided as a hollow structure, a rubber plug is installed at the top of the inner tube, the bottom of the inner tube is provided with a fixing disc, and a plurality of groups of notches are formed in the middle part of the fixing disc; the outer wall of the outer cannula is provided with a fixing ring which is threadedly connected with the outer cannula, the bottom end surface of the fixing ring is provided with a rubber pad; the inner tube is threadedly installed in the middle part of the inner side of the outer cannula, the middle part of the outer wall of the inner tube is provided with an elastic sealing ring; and the plurality of groups of notches are uniformly distributed in the axial direction. In the use process, the access cannula can be implanted and installed without needing to expand the wound of a patient, so that the tearing of the wound is effectively avoided, and the setting of the fixing disc and the fixing ring enables the access cannula to be limited and fixed, so that the loosening and falling of the access cannula is avoided.

The utility model discloses a kind of arthroscopic auxiliary femoral head necrosis drilling decompression positioning device, it is related to medical instrument technical field, including handle main body, the inside of handle main body is provided with positioning unit, the side of positioning unit is provided with drilling unit, the drilling unit includes fixed frame and adjusting assembly, the fixed frame is arranged in the side of positioning unit, the adjusting assembly is arranged in the inside of fixed frame, the adjusting assembly includes limit sleeve, the inside sliding connection of limit sleeve has pressing rod, one end of the pressing rod is fixedly connected with moving frame, the both sides sliding connection in the inside of limit sleeve of moving frame, the side fixedly connected with fixed rod of moving frame.The utility model is provided by limit sleeve, pressing rod, moving frame, fixed rod and spring, so that it is in the process of drilling, the effect of facilitating multiple channel drilling work is achieved, and the effect of further improving treatment is achieved by corresponding one drilling position for each channel.

The utility model provides an arthroscope cannula capable of managing sutures, which comprises a cannula body, a cannula cover and a liquid discharge tube, and the inner wall of a cannula cavity is provided with three axial suture protecting grooves which are uniformly distributed in the circumferential direction; a waterproof cover with three radial opening seams is arranged at the rear end of the tube cavity, and the opening seams are aligned with the wire protecting grooves; and the rear end of the tube cover is provided with three radial wire clamping grooves which are aligned with the opening seam. According to the utility model, through the cooperation of the thread protection groove, the waterproof cover opening seam and the pipe cover thread clamping groove, the surgical suture and the instrument channel can be effectively isolated and orderly fixed, and the problem of interference between the surgical instrument and the suture when the surgical instrument enters and exits is avoided.

A suture cutter that can easily load and hold a tensioned or untensioned suture in place for cutting. The cutter has a handle with an integral stem, and a shaft coupled to and extending from the handle. A tip has a cutting channel with a cradle for catching a suture before cutting. A piston in the handle drives a blade pusher to cut the suture in response to movement of the stem. A guide assembly in the body is formed by a pair of members that fold together via a living hinge to provide a slot for the head of the piston. The pusher is planar and horizontally oriented within the shaft, while the blade is planar and vertically oriented at a right angle to the pusher. The blade has a tab that is captured by a notch in the pusher to interlock the blade and the pusher.

The invention provides an ultra-short period reciprocating motion control system and method for a cutter head of a planer. The system comprises a main control module, a driving control module and a signal feedback module which are connected in sequence, the driving control module and the signal feedback module are respectively connected with a motor for controlling the planer tool bit to reciprocate; the signal feedback module is used for acquiring real-time motion information of the motor and feeding back the real-time motion information to the main control module; the main control module is used for calculating the current speed of the motor according to the real-time motion information and determining a driving control strategy based on the current speed and a reciprocating motion instruction from a user; the drive control module is used for executing speed control and forward and reverse reciprocating motion on the motor based on the drive control strategy. When the planer is applied to an orthopaedic arthroscopic surgery, the cutting frequency in unit time can be effectively increased, so that the medical care requirement of efficiently cutting damaged tissues is met, the movement stability and accuracy of the planer tool bit can be ensured, and the surgery efficiency is greatly improved.

The utility model discloses a scapular glenoid bone tunnel preparation positioning guider for arthroscopic surgery, which comprises a guider handle, a catheter I, a catheter II and a drill point, one end of the guider handle is fixedly provided with a hollow catheter I, the drill point for preparing a bone tunnel is inserted into the catheter I, the drill point is provided with an inner core and a depth limit mark, and the catheter II is provided with a depth limit mark. The inner core is taken out after the bone tunnel is drilled, a pull wire can pass through the inner core for later use, a second hollow catheter is fixedly arranged above the first catheter in parallel, a guide rod playing a guiding role is sleeved with the second hollow catheter, the axis of the second catheter is parallel to the axis of the first catheter, and the inlet end of the second catheter is longer than the inlet end of the first catheter. By means of the ingenious design, high-precision positioning and guiding in the operation process are achieved, the accuracy and efficiency of the operation are effectively improved, the purposes that the bone tunnel is manufactured at a time, and repeated attempts and adjustment are not needed are achieved, the manufacturing quality of the bone tunnel is improved, the operation time is shortened, and meanwhile the operation risk and the occurrence rate of complications are reduced.

An improved positioners used during orthopaedic surgery is provided. Specifically, an improved beach chair positioner for use in arthroscopic shoulder surgeries is provided.

This invention relates to a portable arthroscopy, comprising a cable connecting the lens, a traction unit for driving the lens to swing, a steering unit behind the lens, and a scope tube. When the steering unit rotates around its axis of rotation, pulling one of the traction units connected to it backward causes the lens to swing toward the side where the traction unit is located. The arthroscopy lens can swing at various angles to introduce light into the joint cavity; the acquired images can be transmitted to a matching terminal device for display. The arthroscopy of this invention has a simple structure and can be used only once to avoid or reduce sterilization work; the small diameter of the scope tube results in smaller incisions and easier handling; the arthroscopy can also have a surgical tool intervention channel, and is equipped with various surgical tools, any one of which can be selected and installed at the intervention channel for joint examination or treatment.

The utility model relates to a pusher for cartilage injury repair under an arthroscope, which belongs to the technical field of medical instruments and comprises a push rod and an outer sleeve, the push rod is movably arranged in the outer sleeve and is in interference fit with the outer sleeve, and the tail end of the outer sleeve is connected with a handle convenient to hold; an inclined groove is formed in the head end of the outer sleeve, the outer sleeve comprises a semi-groove pipe, and the semi-groove pipe is used for guiding other auxiliary instruments to conduct an operation; according to the pusher for the cartilage injury repair operation under the arthroscope, repair materials are pushed to a designated injury position through cooperation of the push rod and the outer sleeve, the head end of the outer sleeve is designed to be of an inclined groove structure so that laying and operation of the cartilage materials in the operation can be facilitated, and the semi-groove pipe is arranged to guide other auxiliary instruments to conduct the operation; according to the utility model, the surgical operation is more convenient and quicker, the repair material can be effectively prevented from being damaged, and the surgical efficiency is improved.

The invention provides an arthroscope which comprises a first shell, an operation structure, a connecting structure, an insertion tube and an arthroscope body tube, the operation structure is movably arranged on the first shell, at least one part of the connecting structure is arranged in the first shell, the operation structure is in driving connection with the connecting structure, one end of the insertion tube is connected to the connecting structure, and the other end of the insertion tube is connected to the arthroscope body tube. One end of the endoscope body tube is fixed to the first shell, the other end of the endoscope body tube is arranged outside the first shell and used for puncturing, the first end of the endoscope body tube is fixed to the first shell, the second end of the endoscope body tube is arranged in the insertion tube, and the insertion tube can axially move relative to the endoscope body tube. According to the arthroscope, the operating structure is in driving connection with the connecting structure, and through driving of the operating structure, the connecting structure drives the insertion tube to axially move relative to the arthroscope body tube; according to the arthroscope, the arthroscope body tube is formed into a fixedly-arranged structural part, so that a connecting line matched with the arthroscope body tube does not need to act, and the problem that in the prior art, the arthroscope is affected by a cable in the using process, and the using effect is poor is solved.

The utility model belongs to the technical field of medical instruments, and provides a wrist arthroscope cannula which comprises a sterile syringe cannula, a through hole is formed in the sterile syringe cannula, a skylight is formed in the top of the sterile syringe cannula, finger hook hanging plates are symmetrically installed on the periphery of the sterile syringe cannula, and the finger hook hanging plates are connected with the sterile syringe cannula. The finger hooking plate is positioned on one side of the periphery of the sterile syringe sleeve; the bush-hook is located on the other side of the sterile syringe sleeve, and one side of the bush-hook extends into the sterile syringe sleeve; the wrist arthroscope body is positioned on one side of the sterile syringe sleeve; when the sterile syringe sleeve, the bush-hook and the wrist arthroscope are adopted for surgical treatment, surgical consumables can be greatly reduced, the treatment cost is reduced, and the skylight is formed in the top of the sterile syringe sleeve, so that a processing space can be provided for surgery.

The utility model relates to the technical field of medical instruments, in particular to an arthroscopic surgery auxiliary device which is characterized in that a motor is installed at the top end of a device base, a ball screw is fixed to the output end of the motor, the surface of the ball screw is rotationally sleeved with a movable shell through threads, and a leg placing position is fixed to the top end of the movable shell; a knee placing position is hinged to one side of the leg placing position, a connecting rod is hinged to the bottom end of the knee placing position, fixing rods are arranged on the two sides of the connecting rod, arc-shaped grooves are formed in the surfaces of the fixing rods in a penetrating mode, and movable inserting columns are movably inserted into the arc-shaped grooves. The knee placement position, the connecting rod, the fixing rod, the movable inserting column and the nut are used in cooperation, the purpose of being suitable for the knee bending degree of a patient can be achieved, and a doctor can obtain a clearer and more comprehensive joint internal view.

This invention provides a graft-encapsulating syringe, comprising: a syringe barrel; a piston rod, one end of which is disposed within the syringe barrel to form a piston and is movable relative to the syringe barrel along its length, the other end of which forms an operating end; an injection needle disposed on the syringe barrel, the injection needle including a needle body and a movable component at the end of the needle body for forming a needle tip, the needle body communicating with the syringe barrel cavity, the movable component consisting of multiple needle flaps rotatably connected to the needle body; and a drive mechanism disposed on the syringe barrel and electrically connected to the multiple needle flaps to drive the multiple needle flaps to unfold or snap together, the multiple needle flaps being snapped together to encapsulate the graft, and the medication in the syringe barrel cavity being delivered to the graft site through the needle body. The graft-encapsulating syringe provided by this invention can be applied in arthroscopic and other surgeries, achieving injection into the graft by encapsulating it.

A tool kit for minimally invasive implantation of a tendon fixation implant in the field of arthroscopic human medicine is provided. The tendon fixation implant includes a medial anchor, a lateral anchor, and a base plate. The tool kit includes a medial anchor inserter having a medial anchor drive mandrel and a medial anchor release tube. The medial anchor release tube is designed to receive the medial anchor drive mandrel. The medial anchor drive mandrel is designed both to receive a medial anchor and to introduce the medial anchor into bone by driving it into the latter. The medial anchor drive mandrel has a locking head for locking the medial anchor drive mandrel to the medial anchor release tube. The tool kit includes a base-plate inserter having a handpiece and a base-plate inserter tube designed to receive the base plate of the tendon fixation plate.

The utility model relates to the technical field of medical rivets, and provides an antibacterial absorbable gentamicin-loaded silk fibroin medical rivet and a mold. The rivet rod of the rivet is provided with an inner hexagonal notch and a wire passing through hole, and the screw pitches of threads at the near end and the far end of the rivet are different, so that the fixing strength of the rivet in sclerotin can be enhanced; the material overcomes the defects that metal cannot be absorbed and polylactic acid is used as a material, and can be degraded in time, resist bacteria, reduce foreign body reaction and inflammation and promote tissue healing; and the internal structural design of the rivet can meet the use requirement of the rivet under an arthroscopic surgery. The personalized mold is suitable for the special preparation process of fibroin, a mold body is composed of an upper mold body and a lower mold body which are detachable, and a pouring cavity formed by butt joint of pouring grooves of the upper mold body and the lower mold body can precisely mold the appearance of a rivet; the inner core assembly comprises an inner hexagonal column, a circular column and a positioning seat, and the inner structure of the rivet can be accurately formed. And the rivet is integrally formed to avoid later processing, so that high standard and consistency of products are ensured. The mold is ingenious in overall matching, convenient to assemble, maintain and operate, and time-saving and labor-saving.

This invention relates to the field of medical assistive device technology, specifically to a portable orthopedic arthroscopy device, including a handle with a detachably connected endoscope body. A clamping assembly for fixing or releasing the endoscope body is provided between the handle and the endoscope body. A cleaning assembly for cleaning the optical surface of the endoscope body's front end is located inside the handle. The handle also includes a transmission assembly that drives the clamping assembly and the cleaning assembly in conjunction; when the transmission assembly moves forward, it drives the clamping assembly to fix the endoscope body; when the transmission assembly moves in reverse, it drives the clamping assembly to release the endoscope body and simultaneously drives the cleaning assembly to clean the endoscope body. This invention simplifies the operation process, reduces operation time, and improves the overall convenience and smoothness of the device's operation.

This invention provides an arthroscopic tool for locating and reducing tibial plateau fractures, belonging to the field of medical device technology. The tool includes a positioning component for determining the X-position of the collapsed bone fragment and a guide calibration component for guiding the guide pin. The positioning component includes a first positioning arm, a second positioning arm, and a protrusion. The guide calibration component and the second positioning arm are located on the same side of the first positioning arm, and the second positioning arm is rotatably connected to the first positioning arm via a rotating component. The first and second positioning arms are connected by a rotating component, allowing the second positioning arm to be angled according to the patient's anatomical structure to accommodate individual differences. Furthermore, by setting the guide calibration component, the guide sleeve is always oriented towards the protrusion, maintaining the accuracy of the guiding path even when the first and second positioning arms rotate relative to each other.

The utility model belongs to the technical field of medical instruments, and particularly relates to an intervention piece and an integrated arthroscope system, which are particularly suitable for joint treatment scenes. An interventional member for use in an arthroscope system, comprising: a hollow cannula portion having a distal end and a proximal end; the base part is fixedly arranged on the window at the far end of the sleeve part; the electrode part is fixedly arranged on one side, far away from the sleeve part, of the base part and is used for selectively generating plasmas in a patient area; the device further comprises a detection part, the detection part is fixedly arranged on the base part, the detection part and the electrode part are arranged on the same side in a spaced mode, and the detection part is arranged towards the electrode part so as to display information of the area where the electrode part is located. Operation efficiency is improved, and operation cost is reduced.

The invention discloses a visual field maintaining and synchronous suturing suite for arthroscopic rotator cuff suturing, and relates to the technical field of medical instruments, the visual field maintaining and synchronous suturing suite comprises a visual field maintaining assembly, the visual field maintaining assembly comprises a hemisphere-like spherical air bag wall, the top of the hemisphere-like spherical air bag wall is provided with an inflation tube, and the inflation tube extends out of the body; the synchronous suturing assembly comprises a forceps body, a push rod extends into the guide cylinder, a first forceps head is fixedly mounted at the tail end of the guide cylinder, a containing box is arranged close to the first forceps head and located on one side of the guide cylinder, a gear is rotationally mounted on the containing box, a rack is mounted on the push rod corresponding to the gear, a shifting rod is fixedly mounted on the gear, and a pressing rod is rotationally mounted on the containing box; a needle clamp is fixedly installed at the end of the pressing rod and fixedly provided with a suture needle, the suture needle is arranged in a first penetrating cavity formed in the side of the first forceps head, a second forceps head is rotationally installed at the tail end of the push rod and provided with a second penetrating cavity corresponding to the first penetrating cavity, and after the space is expanded by the hemisphere-like spherical air bag wall, the needle clamp is fixedly installed on the needle clamp. The synchronous suturing assembly clamps the tissue and enables a suture needle to penetrate through the tissue at the same time.

This invention relates to the field of medical device technology, specifically to a balloon device for minimally invasive reduction and fixation of intra-articular fractures. The device includes a cannula, within which an arthroscope slides and engages. A delivery tube for transporting the reduction balloon body also slides and engages within the cannula. The reduction balloon body includes a support balloon mechanism for transporting a support structure and a propulsion balloon mechanism for moving the fracture ends. The support balloon mechanism includes a clamping end and several movable ends. One end of the clamping end is detachably connected to the delivery tube, and a groove for placing the support structure is formed within the clamping end. The movable ends are fixedly connected to both sides of the clamping end. A base plate is fixedly connected within the groove, and several pressure sensors are fixedly connected to the base plate for measuring pressure data when the support structure contacts the fracture ends. The pressure sensors are electrically connected to a display panel for displaying the pressure data. This invention ensures accuracy during the docking of multiple fracture ends and improves the stability of the fixed fracture ends.

The invention discloses an arthroscope puncture instrument for the orthopedics department. The arthroscope puncture instrument for the orthopedics department comprises a supporting plate, and a supporting and fixing mechanism is arranged above the supporting plate; the supporting and fixing mechanism comprises a popliteal space base plate, a shank base plate and a thigh base plate, the sides, close to each other, of the shank base plate and the thigh base plate are connected with the popliteal space base plate, and the other sides of the shank base plate and the thigh base plate are connected with the supporting plate; bandages are mounted on the shank base plate and the thigh base plate. According to the arthroscope puncture instrument for the orthopedics department, the supporting frame with the position capable of being transversely adjusted is arranged on the arc-shaped frame, the supporting block with the position capable of being longitudinally adjusted is installed on the supporting frame, and the supporting pipe capable of being deflected for use is installed on the supporting block, so that the three-dimensional space position of the arthroscope puncture instrument penetrating into the supporting pipe can be adjusted; and the device can deflect by a certain angle and can be better adapted to the change of an operation puncture angle for use.

A liquid guided laser arthroscopic surgery device comprises a laser (1), a central control system (2), a handheld scalpel pen (12), a high-pressure liquid supply system (11), a low-pressure liquid supply system (13), a liquid pumping device (4), an optical fiber (3), a liquid pipeline (14), a liquid supply small hole (17), a liquid supply hose (18) and a joint cavity (23). A coupling cavity (7) is formed in the handheld scalpel pen (12), and a nozzle (9) is arranged at the front end of the handheld scalpel pen (12); and laser emitted by the laser (1) passes through the focusing mirror (5) and the transmitting mirror (6) and forms a coaxially-coupled laser liquid beam (10) with the isotonic normal saline in the coupling cavity (7) in the coupling cavity (7). The invention also claims to protect a method of use of the liquid guided laser arthroscopic surgical device. The operation is intelligent, safe and controllable; the operation application range is wide, and the biological action is accurate; the device is suitable for a non-contact operation mode, the operation process is simplified, the cost is low and the efficiency is high; and the comprehensive technical effect is excellent.

The invention discloses a coaxial continuous flushing and sucking end effector for a flushing robot, and belongs to the technical field of joint cavity flushing, the coaxial continuous flushing and sucking end effector comprises a slender rod main body, the axial upper end of the slender rod main body is connected with a Y-shaped connecting piece through a rotary sealing joint, and the slender rod main body comprises an outer sheath, an inner sheath and a mirror sheath which are sequentially arranged from outside to inside; an annular water injection channel used for conveying flushing fluid is formed between the outer sheath and the inner sheath, an annular water suction channel used for discharging waste liquid and impurities in joints is formed between the inner sheath and the arthroscope sheath, and an arthroscope body containing channel used for containing an arthroscope body in a penetrating mode is formed in the arthroscope sheath. And a water injection valve seat communicated with the water injection channel and a water suction valve seat communicated with the water suction channel are respectively arranged on the side wall of the outer sheath. By the adoption of the coaxial continuous flushing and sucking end effector for the flushing robot, the technical problems that an existing device is lack of coaxial continuous flushing, flow field distribution is uneven, and a mirror body self-protection function is not achieved can be solved.

The invention discloses an arthroscopic surgery auxiliary device, and relates to the technical field of medical auxiliary instruments. The first threaded rods are rotationally inserted into the left side and the right side of the front portion of the operating bed through bearings, strip-shaped blocks are movably inserted into the inner walls of the front sides of the containing grooves, the first threaded rods are rotationally arranged on the strip-shaped blocks in a penetrating mode through threads, and the first connecting blocks are rotationally arranged at the rear ends of the two strip-shaped blocks through shafts and bearings; the first connecting blocks are movably inserted into the second supporting plates and are rotationally connected with the second supporting plates through shafts and bearings, the second connecting blocks are rotationally inserted into the two first supporting plates through the shafts and the bearings, rotating rods are fixedly arranged on the second connecting blocks, and the rotating rods are rotationally inserted into the rear sides of the placing grooves through bearings; the limb fixing device can be adjusted and fixed in different bending states of the limbs of a patient, the limbs of the patient can be adjusted to be inclined to a certain degree and fixed according to the operation requirements of a doctor, and meanwhile auxiliary supporting can be provided for the arms of the doctor in the operation process.

The invention discloses a cannula device for temporomandibular arthroscope approach, and relates to the technical field of medical instruments, the cannula device comprises a cannula assembly and a handle, one end of the handle is provided with a cannula piece, the top of the handle is sleeved with a sealing cover, one side of the handle is fixedly provided with a flushing pipe, and the other side of the handle is fixedly provided with an injection pipe. According to the invention, each passage can be opened and closed synchronously, it is ensured that only one passage is opened in the operation process, pipeline pollution caused by backflow of internal liquid is avoided, the other two passages are closed in the operation process, the operation process is not influenced by the other two passages, the whole structure is divided into three gears, and the operation is convenient. By means of the technical scheme, quick switching of the channels can be achieved only by manually rotating the rotating disc, the operation convenience of medical staff is greatly improved, automatic exhaust probing can be conducted after the channels are closed, and compared with manual probing through a probe, probing is faster, and operation time is saved.