69results about How to "Reduced surgical steps" patented technology

A system for reducing curvature of a spine is provided, the system comprising a spinal construct having an elongated longitudinal element affixed to and extending between a first fixation element and a second fixation element, the first fixation element having a first end configured to engage at least a portion of a first anchor member, and the second fixation element having a second end configured to engage at least a portion of a second anchor member, the first and second anchor members configured to pierce the spine, wherein the elongated longitudinal element is configured to generate a corrective force sufficient to reduce curvature of the spine. The systems and methods provided allows a surgeon to select a tether, determine its length, and pre-assemble the spinal construct, which then can be coupled onto the head of a bone anchor.

The invention discloses an individual orthopedics department positioning sheet based on the medical image three-dimensional reconstruction and computerized design technology. The individual orthopedics department positioning sheet is manufactured based on 3D printing or other machining methods and is used for knee prosthesis. The positions of key positioning holes and cutting faces in knee prosthesis are particularly and accurately determined. Firstly, a skeleton model is reconstructed based on medical images; preoperative planning is carried out on the reconstructed model so as to determine important parameters of a lower extremity force line, a thighbone rotating shaft, an osteotomy reference point and the like and simulate osteotomies and prosthesis imbedding; by means of the results, the positioning sheet (in a single positioning type or a composite type) is determined and designed; a doctor logs into a data management module to query data. The single positioning type positioning sheet is formed by thickening and punching on an extraction face of the reconstructed model; the composite positioning sheet is a combination of the single positioning type positioning sheet and an osteotomy device, and the osteotomy positioning function is achieved. By means of the positioning sheet designed through an auxiliary system, the lower limb force line can be accurately reconstructed, and accurate osteotomies can be achieved; an informatization management method is provided by the data management module for operations, and convenience is brought to data storage and querying.

The invention discloses an easily-removing implant device and a screwing-out tool thereof. The easily-removing implant device comprises an implant, a base station and a central bolt; the easily-removing implant device is characterized in that the implant comprises a gum-penetrating neck part and a head part, wherein a thread is formed on the outer surface of the head part, at least two spiral self-tapping grooves are also formed in the outer surface of the head part, a connecting hole coaxial with the implant is formed in the implant, the connecting hole comprises a tapered hole, an anti-rotation hole, an implant taking-out section and a blind threaded hole, which are sequentially connected coaxially, the base station comprises a dental crown connecting section and an implant connecting section, the implant connecting section comprises a conical table and an anti-rotation column, a stepped hole matched with the central bolt is formed in the base station, and the central bolt penetrates through the stepped hole to be connected with the blind threaded hole, so that the base station and the implant are fixed integrally. According to the easily-removing implant device, the implant taking-out section with a reverse thread is additionally arranged in the implant, the problem that a part of the implant, which is remained in dentale due to fracture of the implant, is difficult to take out is solved, and the easily-removing implant device has the advantages of simple structure, strong practicability, and the like.

The invention discloses a combined rigid ureteroscope which comprises a rigid ureteroscope body and a tubular sheath which is sheathed outside a tubular part of the ureteroscope body, wherein a starting end of the sheath is tightly attached to the tubular part of the ureteroscope body; the rear end of the sheath is equipped with a locking mechanism; a locking part is arranged between the tubular part and an operation part of the ureteroscope body; and the locking mechanism is matched with the locking part so as to lock or loosen the rigid ureteroscope body and the tubular sheath. By adopting the combined rigid ureteroscope,, the locking mechanism between the ureteroscope body and the sheath can be loosened during operations for examination, diagnosis and treatment of ureter and kidney, the rigid ureteroscope body and the sheath can be separated, and the sheath is left in the ureter and utilized as a channel through which broken stones can be repeatedly taken out for multiple times or the ureteroscope body separately gets in and out of the ureter as well as an operation channel of a flexible ureteroscope, thereby saving the operation procedures, shortening the operation time and improving the operation safety; and moreover, in some operation procedures, the rigid ureteroscope can be used instead to implement projects that must be implemented by the flexible ureteroscope before,thereby avoiding the problems of difficult operation and easy damage of the flexible ureteroscope, and actually realizing safe, effective and low-cost clinical treatment.

The invention provides an artificial dental implant, an artificial dental implanting system and an implanting method. A screwed thread is formed in the outer surface of an artificial dental implant, wherein a neck part and a head part are respectively arranged at two ends of the implant; a spiral tapping slot is formed in the outer surface of the head part, the spiral direction of the spiral tapping slot is the same as that of the screwed thread, and the spiral lead angle of the spiral tapping slot is different from that of the screwed thread. When the artificial dental implant is implanted, the cutting force and extrusion force of the implant to the bone tissues at the implanted position are reasonable, and the bone is effectively protected from injury; the artificial dental implant can accommodate bone chips generated in the tapping process, and the bone healing time can be shortened; the artificial dental implant is effectively prevented from rotating or loosing, and the service life of artificial tooth can be prolonged.

The invention provides an extra-cavity anastomotic method. The extra-cavity anastomotic method includes enabling two broken ends of a hollow organ to be anastomotic to penetrate from intermediate through holes from a nail bin and a base relatively and reversely overturning outwards to expose the anastomotic positions of the two broken ends, sewing the anastomotic positions of the two broken ends by sewing nails and excising the residual ectropion part of the hollow organ by a rotary cutter. The invention further provides an ectropion type extra-cavity anastomat. An outer casing is a three-way pipe, a nail bin is fixed in a nail bin connecting pipe, the base and the nail bin are coaxially and relatively arranged, and the axes of the nail bin and the base are parallel to the axis of a base connecting pipe; the nail bin and the base are annular, a ring cutter is mounted in the nail bin and embedded in the end face of the nail bin and can axially move in the nail bin, and the end face of the base is provided with a ring slot matched with the ring cutter. The nail bin and the base are not coaxial with the outer casing, the two broken ends of the hollow organ to be anastomotic conveniently penetrate the intermediate through holes of the nail bin and the base, and extra-cavity anastomosis is realized.

The invention discloses an anatomic calcaneus locking bone plate which comprises an upper locking pressurization section and a lower locking pressurization section. The upper locking pressurization section and the lower locking pressurization section are connected with each other by a connecting locking pressurization section to be integrally distributed to form an approximate U shape, and a forking locking pressurization section which is upwardly arranged further integrally extends at the outer end of the lower locking pressurization section; the upper locking pressurization section, the lower locking pressurization section, the connecting locking pressurization section and the forking locking pressurization section are respectively arc-shaped along the respective length directions of the upper locking pressurization section, the lower locking pressurization section, the connecting locking pressurization section and the forking locking pressurization section and can cling to the surface of the calcaneus of a patient, pressurization tension holes and locking holes are further formed in the upper locking pressurization section, the lower locking pressurization section, the connecting locking pressurization section and the forking locking pressurization section along the respective length directions of the upper locking pressurization section, the lower locking pressurization section, the connecting locking pressurization section and the forking locking pressurization section at intervals, the walls of the pressurization tension holes are smooth, and internal threads are arranged in the locking holes; a supporting portion which can support the calcaneus of the patient from bottom to top further integrally extends at the bottom of the lower locking pressurization section. The anatomic calcaneus locking bone plate has the advantages that preliminary shaping which conforms to the anatomic structure of the calcaneus of the body of the patient is performed on the anatomic calcaneus locking bone plate, operation steps are saved, and the anatomic calcaneus locking bone plate is good in calcaneus locking effect and is high in stability during usage.

The invention discloses an orthopaedics department knee joint anterior cruciate ligament dissection reestablishment system which comprises a thighbone end locator, a central hole locator, a 8 / 9 mm hollow drill, a 6 / 12 point hole fixing device, a 6 point hole sleeve, a 3 / 9 point hole fixing device, a 3 / 9 point hole leveling device, a working sleeve, a working sleeve introducer, a shin bone end locator, a kirschner wire and a guiding needle. The orthopaedics department knee joint anterior cruciate ligament dissection reestablishment system is simple in structure, convenient to use, capable of reestablishing the anterior cruciate ligament of a knee joint conveniently.

The invention discloses an anti-rotation implant device which comprises an implant, an abutment and a central bolt. The anti-rotation implant device is characterized in that the implant comprises a gum penetrating neck and a head; a thread is arranged on the outer surface of the head; at least two helical self-tapping grooves are formed in the outer surface of the head; connecting holes are formed in the implant and are a positioning hole and a threaded blind hole which are coaxially connected in sequence; at least two positioning embossments are arranged on the upper end surface of the implant body; the abutment comprises a dental crown connecting section and an implant connecting section; an annular positioning table is arranged between the dental crown connecting section and the implant connecting section; positioning grooves matched with the positioning embossments are formed in the annular positioning table; a ladder hole matched with the central bolt is formed in the abutment; the central bolt penetrates through the ladder hole to be connected with the threaded blind hole so as to fix the abutment to the implant. According to the anti-rotation implant device, the positioning embossments on the upper end surface of the implant are matched with the annular positioning table on the abutment, so that a relatively large rotary torque can be born, connection is relatively firm, and the service life is prolonged.

A drill tap dilator comprises a dilator body having a central lumen extending therethrough, an elongate sleeve slidably received with the lumen, and a control knob coupled to the sleeve. The control knob is movable rotatably and axially relative to the dilator body. The sleeve includes docking teeth that are extendable from a retracted position within the body lumen to a deployed position outside the body lumen upon rotation of the control knob relative to the dilator body in one rotational direction. Adjustment of the length of drill tap dilator is allowed upon rotation of the control knob in an opposite rotational direction relative to the dilator body and manual axial movement of the control knob relative to the dilator body.

The invention discloses a bone tunnel cross pin positioning tool used in the department of orthopaedics and the application thereof. The tool comprises a bone tunnel center hole guider, a cross pin inlet guider, a cross pin inlet preboring needle, a cross pin inlet guiding sleeve, a cross pin inlet grasping stabilizer, an opposite-side bone thickness detection guider, an opposite-side bone thickness detection needle, a bone tunnel center preset confirming needle and a cross pin driver. By the adoption of the tool, perpendicular interlocking and expanding fixation of a cross pin at the center of the interior of a bone tunnel is achieved during ligament reconstruction in the department of orthopaedics.

The invention provides a personalized knee joint osteotomy guide plate assembly, which comprises a personalized knee joint distal femur osteotomy guide plate, a personalized knee joint proximal tibiaosteotomy guide plate, an osteotomy groove metal assembly, and a location hole metal sleeve. The personalized knee joint osteotomy guide plate assembly ingeniously utilizes personalized osteophyma ofthe intraoperative patient as a location marker of the distal femur osteotomy guide plate and the proximal tibia osteotomy guide plate without using articular cartilage for fixing, accordingly intraoperative positioning and entrapment are easy and are not affected by articular cartilage. When the distal femur osteotomy guide plate and the femoral cortex are fixed and entrapped well, the position is where the osteotomy guide plate is arranged and the distal femur osteotomy is conducted, so that no medullary opening location is required, surgical procedure is reduced, and time is saved.

The invention discloses an ACL multi-beam reconstruction technology for a knee-joint ACL (anterior cruciate ligament) for department of orthopaedics, and the technology comprises a thighbone end footprint positioner, a door-type guide frame, a positioning operation channel sleeve, a positioning operation channel sleeve guider, a central hole positioner, an orthopaedics department hollow drill, a cancellous bone extractor, a 12-point positioning guider, a 3 / 9 point positioning guider, a shin bone end arc-shaped positioning guider, a shin bone end central hole positioning guider, and a shin bone end trepanning guider. The technology is convenient to use, can achieve the protogenetic reconstruction of the knee-joint ACL conveniently, achieves the complete covering of a deserved footprint region, achieves the function of the intersecting of a front beam and a rear beam, and achieves the protogenetic reconstruction after repeated damage.

The invention relates to a multifunctional vertebral body former, which comprises a balloon structure and a conveying pipe structure, the conveying pipe structure comprises a shape memory alloy pipe,a sliding block and an outer pipe adjusting handle, a balloon outer pipe and a balloon are sleeved with the shape memory alloy pipe, and the near end of the shape memory alloy pipe is fixedly connected with the far end of a sliding block; the near end of the sliding block is detachably connected with the balloon structure through a first clamping lug; the outer surface of the sliding block is provided with a threaded structure, the outer surface of the sliding block is sleeved with an outer tube adjusting handle with an internal threaded structure, the outer tube adjusting handle is rotated todrive the sliding block to move front and back, and therefore the protruding amount of the far end of the shape memory alloy tube relative to the far end of an outer tube and the protruding amount ofthe far end of the balloon relative to the far end of the shape memory alloy tube are controlled. The multifunctional vertebral body former is simple in structure and easy to operate, vertebral dilation of a bone drill and pre-dilation of a balloon catheter are integrated on one instrument, surgical operation is simplified, surgical time is shortened, surgical efficiency is improved, and meanwhile physical requirements of doctors and economic burdens of patients are reduced.

The invention discloses an n-shaped locking palm dorsal bone plate comprising a fixed short locking arm and a fixed long locking arm which are connected into the n shape integrally through a connecting locking arm. Auxiliary locking arms respectively extend from two ends of the connecting locking arm. A plurality of locking holes with internal threads are respectively formed in the fixed short locking arm, the fixed long locking arm, the connecting locking arm and the two auxiliary locking arms along lengths thereof, and the fixed short locking arm, the fixed long locking arm, the connecting locking arm and the two auxiliary locking arms are in arc-shaped arrangement matched with the radius surface respectively. The middle of the connecting locking arm is bent inwards, so that the connecting locking arm, the fixed short locking arm and the fixed long locking arm form an opening fitting with the size of the radius dorsal nodule. The bending angle of the connecting locking arm ranges from 144.5 degrees to 145.5 degrees, the included angle between the fixed short locking arm and the connecting locking arm ranges from 165.5 degrees to the 166.5 degrees, and the included angle between the fixed long locking arm and the connecting locking arm ranges from 169.5 degrees to 170.5 degrees. The n-shaped locking palm dorsal bone plate is premoulded according to the human body anatomy structure and has good locking effect, and excision of the radius dorsal nodule is avoided during use.

The invention discloses an oral implant with an asymmetric thread structure. The oral implant comprises an implant part c, an implant part b and an implant part a in sequence from top to bottom; a column body is arranged at the contact part of the implant part c and a compact bone; the implant part b adopts a cone with a cambered surface; the bottom surface of the implant part a is a circular arc surface; an asymmetric thread is arranged on the oral implant; the depth of the asymmetric thread is gradually decreased from the implant part b to the implant part c and the implant part a on the two sides of the implant part b; the inclined angle between the upper edge of the asymmetric thread and the horizontal plane is smaller than that between the lower edge of the asymmetric thread and the water level; a circular arc surface is arranged at the transition part of either the upper edge or the lower edge of the asymmetric thread and the vertical surface of the bottom diameter of the asymmetric thread; the helix angle of the asymmetric thread is varied along with the variation of the diameter of the implant; the thread structure can transfer a bite force well, has a good retention force, and can avoid stress concentration; the screw pitch is reasonable, the helix angle has self-lock performance, and the stability is improved; the variable thread depth can reach the optimal bone bonding strength.

The invention discloses a surgical wound retractor. The surgical wound retractor includes a flexible retracting assembly and a deformable pipe sleeve. The flexible retracting assembly includes an expandable balloon, a support and an inflating device. The deformable pipe sleeve can deform and expand with the expandable balloon, and can fix and keep the shape so as to open a retracting channel; andthe deformable pipe sleeve and the expandable balloon are separated from each other. The surgical wound retractor can retract a wound or channel to be retracted from inside in an operation, can reducesecondary damage to the wound and surrounding tissues thereof due to the retractor, and can relieve pains of a patient in the operation.

The present disclosure relates to an electrode catheter which comprises a front end support part configured as a front end free end of the electrode catheter; a rear end control part and the front end support part are respectively arranged at two ends of the electrode catheter; an inner tube extending at least between the front end support part and the rear end control part and configured to define a shape of the electrode catheter; an outer tube wraps the inner tube, and the distance between the far end of the outer tube and the far end of the inner tube is fixed; and an electrode arm part is arranged between the inner tube and the outer tube and comprises a first electrode arm and a second electrode arm, the far end of the first electrode arm and the far end of the second electrode arm are fixedly connected with the inner tube through the front end supporting part and extend between the front end supporting part and the rear end control part, the first part of the first electrode arm and the second part of the second electrode arm are suitable for being switched between a first linear state and a second annular state, and each of the first part and the second part comprises at least one electrode.

The invention provides an ESD stripping endoloop. The ESD stripping endoloop comprises a handle, an outer tube, a sliding block, an inner tube and two conductive wires. One end of the handle is a handheld end, one end of the outer tube is connected with the outer side of the other end of the handle through a rotary component, the sliding block sleeves the handle and cannot rotate, and the slidingblock can slide in the length direction of the handle. The inner tube is arranged in the outer tube, and one end of the inner tube stretches into the handle, and is fixedly connected with the slidingblock. The two conductive wires are parallel and are fixed into a whole and arranged in the inner tube, one end of each conductive wire and a loop (with a metal spherical point) are in closed connection, and the other ends of the conductive wires stretch into the sliding block and are connected with an electrode to form an electric circuit; the loop is made from a material with a shape keeping capacity, the loop can be expanded to be annular after being pushed out of the outer tube, and the loop can be closed after retracting into the outer tube. The loop has an electric cutting function in cooperation with power supplied by an electrode, and a diseased region can be smoothly stripped and held to be resected.

The invention relates to the technical field of intravascular self-expanding stent conveying and discloses a quick exchange type balloon stent mounting device and a stent mounting method. The quick exchange type balloon stent mounting device is used for mounting a self-expanding stent at a diseased region of a blood vessel and comprises a balloon dilatation catheter, a micro guide wire and a stent release tube, a first through hole is formed in the balloon dilatation catheter along a length direction, and a wire penetrating hole is formed in the side wall of the first through hole; the micro guide wire can enter the first through hole through a far end of the balloon dilatation catheter and penetrate out of the wire penetrating hole; an expansion part is arranged at the far end of the balloon dilatation catheter, and a self-expanding stent is slidably mounted in the first through hole and located at the far end of the balloon dilatation catheter; and the stent release tube is arranged in the first through hole of the balloon dilatation catheter in a sliding mode, and a far end of the stent release tube is abutted against the self-expanding stent. The self-expanding stent can be conveyed and mounted by mounting the balloon dilatation catheter at a time, and the success rate of an operation is increased.

The invention relates to a microcatheter with a head end capable of being eluted, and belongs to the technical field of medical instruments. The microcatheter comprises a microcatheter main body, a stress expansion tube and a Luer taper; the microcatheter main body is connected with one end of the stress expansion tube; the other end of the stress expansion tube is connected with the Luer taper; the surface of the microcatheter main body is coated with a release type coating. The microcatheter with the head end capable of being eluted provided by the invention can release surfactants or hydrophilic polymer substrates, thereby greatly reducing the adhesive force of a micelle formed by a liquid embolic agent to an embedded microcatheter, so that the microcatheter can be easily withdrawn fromthe micelle formed by the embedded liquid embolic agent. For a doctor, the risk of catheter withdrawl is greatly reduced, operating procedures are reduced, and mental pressure is reduced.

A tubular external binding device is composed of a main body consisting of external tubular module and internal tubular module, a location regulating unit consisting of the extended push rod and slotted rod in said internal tubular module and a rear knob, and a triggered binding unit consisting of the nail push rod and nail push plate in said external tubular module and a trigger handle.

The invention discloses an incision protection device for quickly reconstructing pneumoperitoneum of a laparoscope. The incision protection device comprises an upper lid, a dual-ring incision protection device, a sealing membrane and a piston cannula, the piston cannula and an inflation tube are arranged above the upper lid, a valve is arranged on the inflation tube, multiple fixation blocks are equidistantly and fixedly connected to the side wall of an outer ring of the upper lid and provided with threading holes, the upper lid is connected to an enterocoelia outer elastic ring through a buckle, the upper end of the sealing membrane is arranged in the enterocoelia outer elastic ring, and the lower end of the sealing membrane is arranged in an enterocoelia inner elastic ring. By means of the incision protection device, the surgical operation speed can be effectively increased, the surgical steps are reduced, the device is convenient to use, the gas tightness of the enterocoelia can beeffectively guaranteed, pneumoperitoneum gas leakage is prevented, the occurrence rate of complications such as laparoscopic surgery subcutaneous emphysema and incision infection is reduced, an incision can be protected, contamination to the incision is prevented, and the effects of supporting the incision and exposing the surgical field can also be achieved.

The invention discloses a complex acetabulum fracture inside bone plate which comprises a left bone plate and a right bone plate, wherein the left bone plate and the right bone plate are symmetrical left and right, the left bone plate is formed through integrated type connection of a middle section, a left strip section, a right strip section, an upper section and a lower strip section, extrudingnail holes with internal threads are formed in the middle section at intervals in the left-right direction, lock nail holes with internal threads are formed in the left strip section, the right stripsection and the lower strip section at intervals in the length direction respectively, and a left lock nail hole and a right lock nail hole which are arranged side by side are formed in the upper section; the left strip section is arranged in an arc shape which can be attached to an ilium surface in the length detection, the right strip section is arranged in an arc shape which can be attached toa pubis surface in the length detection, the lower strip section is arranged in an arc shape which can be attached to an ischium surface in the length detection, and the upper section is arranged in an arch surface with can be attached to an acetabulum superior border bone surface. The complex acetabulum fracture inside bone plate can be attached to an acetabulum inside bone, the locking effect isgood, and the stability is high.

The invention belongs to the technical field of medical instruments and relates to a percutaneous dilatational tracheostomy (PDT) tube instrument set capable of reducing cross infection. The instrument set comprises a puncture needle, an injector, a guide wire, a guide wire fixator, a dilator, a tracheostomy tube, a tube catheter and an isolation hood. The PDT tube instrument set constructs a local isolation space at an operation part of a patient and locks an infection source to reduce the required protection grade so as to reduce the burden of medical staff in personal protection, and aims to provide daily available effective protection while serving as an operation tool of tracheostomy tube operation. In addition, the dilator is of an expandable / contractible net cage type structure, canbe easily inserted into a puncture stoma in a small diameter state and can expand in a large diameter state, so that expansion of the trachea and pretracheal tissue of the patient can be completed through one step. Compared with an existing PDT tube instrument requiring multi-step expansion, the PDT tube instrument set can reduce the number of required instruments and the operation steps and shorten the operation time.

The invention discloses quick umbilical cord scissors which comprise a hemostatic clip A and a hemostatic clip B. The hemostatic clip A comprises a collar axle center, a thick spring, an upper support of the hemostatic clip A and a lower support of the hemostatic clip A, and the thick spring is wound on the collar axle center; the upper support of the hemostatic clip A is connected with the lower support of the hemostatic clip A by the collar axle center; the hemostatic clip B comprises a solid axle center, a blade, a blade traction hook, an upper support of the hemostatic clip B, a lower support of the hemostatic clip B and a soft hair spring; the thick spring is wound on the solid axle center; the upper support of the hemostatic clip B is connected with the lower support of the hemostatic clip B by the solid axle center; the blade traction hook and the soft hair spring are arranged on the upper support of the hemostatic clip B; one end of the blade is connected with the solid axle center, and the other end of the blade is connected with the blade traction hook. The quick umbilical cord scissors have the advantages that the two hemostatic clips and the blade are combined with one another, so that a full umbilical cord cutting procedure in caesarean operation can be implemented under the joint effect of the two hemostatic clips and the blade, is simplified and can be completed at one step, the quick umbilical cord scissors are mainly applied to the medical field and bring convenience and safety for medical practice and clinical application, and durations of operation steps can be shortened.

The invention relates to the technical field of stent conveying of integral exchange type balloon dilatation catheters, and discloses an integral exchange type balloon stent mounting device and a stent mounting method. The integral exchange type balloon stent mounting device is used for mounting a self-expanding stent on a diseased region of a blood vessel, and comprises a balloon dilatation catheter and a stent release tube. A first through hole is formed in the balloon dilatation catheter in the length direction, an inlet is formed in the near end of the first through hole, and an outlet is formed in the far end of the first through hole; an expansion part is arranged at the far end of the balloon dilatation catheter, and the self-expanding stent is slidably mounted in the first through hole and located at the far end of the balloon dilatation catheter; the stent release tube is arranged in the first through hole in a penetrating mode through the inlet, the stent release tube is slidably arranged in the first through hole of the balloon dilatation catheter, and the far end of the stent release tube abuts against the self-expanding stent; and a second through hole is formed in the stent release tube in the length direction, and a micro guide wire sequentially penetrates through the outlet of the first through hole, the self-expanding stent and the second through hole.

The invention discloses a knee joint anterior cruciate ligament femoral tunnel needle withdrawal direction guiding and positioning system. The system comprises an arc-shaped positioner, a rotating block piece, a spring and a fastening screw rod, the arc-shaped positioner comprises an arc-shaped part, a horizontal kirschner wire channel is formed in the position, near the end face, of one end of the arc-shaped part, a clamping part is arranged on the other end face of the arc-shaped part, a positioning channel horizontally penetrating the whole clamping part and a vertically upward fastening screw through hole are formed in the lower end face of the clamping part, the axis of the positioning channel is in accordance with that of the kirschner wire channel, the fastening screw through hole is internally provided with a thread, and a center hole is formed in the center of the rotating block piece. The knee joint anterior cruciate ligament femoral tunnel needle withdrawal direction guiding and positioning system is simple in structure, convenient to use and capable of providing accurate femoral tunnel direction to doctors.