99 results about "Knee joint replacement" patented technology

The invention discloses a hip and knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment, relates to the technical field of medical rehabilitation, and discloses the hip and knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment. The training plan is dynamically adjusted in combination with multi-dimensional indexes, the problems of compensation recognition deficiency, feedback lag and plan stiffness in a traditional rehabilitation scheme are effectively solved, the rehabilitation effect can be improved, and the injury risk of adjacent joints can be reduced.

The invention provides an osteotomy path adjusting system in robot-assisted knee arthroplasty, and belongs to the technical field of knee joint detection. The system comprises a multi-modal data acquisition unit which comprises a knee joint pressure measuring gasket, an optical acquisition module and a kinematics data acquisition module, the knee joint pressure measuring gasket is used for acquiring knee joint pressure signals in an operation, and the optical acquisition module is used for acquiring relative poses of a femur and a tibia; the kinematics data acquisition module is used for acquiring kinematics data of the mechanical arm; the main control calculation unit comprises a data fusion module and a dynamic compensation module, and the data fusion module is used for constructing a synchronous spatio-temporal data set; and the dynamic compensation module is used for outputting a compensation instruction to the mechanical arm to adjust an osteotomy path based on the synchronous spatio-temporal data set, the preoperative predicted pressure prediction matrix and the soft tissue stiffness matrix. The pressure change in the operation can be responded in real time, the operation precision of the knee arthroplasty is improved, and the dependence on the experience of doctors can be reduced.

The invention discloses a knee joint replacement post-operation fixing and pressurizing training belt and system. The knee joint replacement post-operation fixing and pressurizing training belt comprises a waist belt, a knee assembly, a foot assembly, a first elastic belt and a second elastic belt. The two sides and the rear portion of the waistband are provided with hooks to be connected with a first elastic belt and connected with the upper end of the knee assembly through the first elastic belt, and the two sides of the lower end of the knee assembly are provided with hooks to be connected with a second elastic belt and connected with the tiptoe component and the heel component of the foot assembly through the second elastic belt. All the components work coordinately, so that comprehensive exercise of knee joints and peripheral muscular tissues of the knee joints is realized; adjusting assemblies are arranged in the knee assemblies, and the training intensity can be adjusted; in addition, each part of the device is provided with an attitude sensor, real-time monitoring of foot and leg motions is realized, motion data is recorded and simulated and analyzed through a monitoring computer on the waistband, user feedback and training guidance are provided, a patient is helped to adjust a training scheme according to personal conditions, rehabilitation training is scientifically carried out, and the recovery process is accelerated.

The present invention relates to a system for determining the angle of osteotomy. The system comprises a plurality of liners, a pressure measurement apparatus and a processing module. Each liner comprises a liner body having an upper surface and a lower surface. A longitudinal distance between a slope region of each upper surface and a planar region of the upper surface gradually increases from a position near the geometric symmetry central axis of the liner to both sides of the liner, so as to define the degree of a tilt angle. The pressure measurement apparatus is used for measuring a pressure applied by each of two extremity sides of a bone joint, so as to determine a pressure difference value. The processing module is configured to determine an angle of osteotomy for the extremity sides on the basis of the tilt angles of the liners that balance the tension of the two extremity sides. The present invention restores the tension condition in a real working state of a joint before osteotomy and takes into account the balance state of the tension of soft tissue as a consideration for the angle of osteotomy, thereby effectively solving the problem of unbalanced tension between soft tissue at the inner and the outer sides of knee joints after total knee arthroplasty, and keeping the original mechanical performance of knee joints of patients after surgery.

The invention relates to a knee joint replacement valgus and valgus balance graphical analysis device, which comprises a gap lattice diagram drawing system, which is configured to obtain force-gap data of soft tissues around a knee joint at different buckling angles and draw an inner side gap-outer side gap lattice diagram; the quantitative index unit is configured to construct quantitative index parameters for measuring the inward and outward turning gap balance according to the inner side gap-outer side gap dot matrix relation under different buckling degrees; and the quantitative analysis system is configured to adjust quantitative index parameters, and formulate an optimization adjustment strategy to carry out inward and outward turning soft tissue balance quantitative analysis according to the inner and outer side gap width difference of the soft tissue around the knee joint at different flexion and extension angles. According to the method, the tension of the soft tissue around the knee joint is quantitatively evaluated according to the force-gap data, the method is used for guiding precise technical adjustment of robot-assisted knee joint replacement, and data and algorithm foundations are laid for analysis methods such as automatic operation plan guidance, prosthesis selection and personalized operations.

The invention provides a data processing method, medium and equipment in knee arthroplasty, and belongs to the technical field of medical electronics. The method comprises the following steps: acquiring pressure distribution data, measured by an array sensor, of an articular compartment in a complete period of joint movement; based on the pressure distribution data, pressure centers under all buckling degrees in the whole period of joint movement are calculated, and corresponding pressure center tracks are formed; calculating shear stress distribution data under the complete period of joint movement based on the pressure center track data; based on the pressure distribution data, calculating a dynamic pressure envelope line under the complete period of the joint movement; and generating an intraoperative correction suggestion for knee arthroplasty based on the pressure center trajectory, the shear stress distribution data and the dynamic pressure envelope. The correction suggestions given by the method are more accurate for abnormal conditions occurring in knee replacement.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

The invention belongs to the technical field of instruments for knee arthroplasty, and particularly relates to a rotatable central positioning angle-adjustable tibia osteotomy template, which mainly comprises a fixed frame, an angle adjusting device, an angle adjusting device and an angle adjusting device, the guide frame is arranged in the mounting groove, an osteotomy groove is formed in the guide frame in a penetrating mode, the guide frame is provided with a first rotating track and a second rotating track relative to the fixed frame, and the axis of the first rotating track is perpendicular to the axis of the second rotating track; the first angle adjusting mechanism is connected with the fixed frame and the guide frame, and the first angle adjusting mechanism is constructed to be capable of driving the guide frame to rotate in the mounting groove along a first rotating track; the second angle adjusting mechanism is connected with the fixed frame and the guide frame, and the second angle adjusting mechanism is configured to drive the guide frame to rotate in the mounting groove along a second rotating track; and when the guide frame rotates along the first rotating track, the second angle adjusting mechanism synchronously moves along with the guide frame.

The invention provides a lower limb fixing device for knee replacement surgery in the orthopedics department and belongs to the technical field of medical equipment. Comprising a bottom box, a fixing assembly used for fixing the legs of a patient is installed at the top of the bottom box, the fixing assembly comprises two first thigh plates, two first shank plates and two foot boxes which are symmetrically arranged at the top of the bottom box, and a second thigh plate is slidably clamped in one end of each first thigh plate. Through cooperation of the fixing assembly, the adjusting assembly and the positioning assembly, it can be ensured that the leg position of a patient is accurate and stable in an operation, the stretching assembly can promote recovery of knee joints after the operation, the postoperative rehabilitation effect of the patient is overall improved, and meanwhile the stretching assembly is additionally arranged, so that the postoperative rehabilitation effect of the patient is improved. The postoperative knee joint recovery process of a patient is more scientific and efficient, the overall recovery effect is optimized by reducing unhealthy symptoms such as muscle stiffness of the whole body, and the defect that traditional postoperative recovery only depends on drugs and passive methods is overcome.

The invention provides a bone joint replacement surgery auxiliary device which comprises a bottom plate, a main lifting part is arranged on the upper side of the bottom plate and comprises two symmetrically-arranged adjusting plates, the lower portions of the side faces of the two adjusting plates are movably arranged on the bottom plate, and the upper portions of the side faces of the two adjusting plates are rotationally connected through a mounting shaft; a mounting opening is formed in the top end of the adjusting plate, a telescopic rod is slidably arranged in the mounting opening, and a positioning piece used for adjusting and positioning the telescopic rod is arranged on the side face of the adjusting plate. According to the auxiliary device for the bone joint replacement surgery, when a patient is subjected to knee joint replacement, supporting and positioning are conducted through the auxiliary device, it is guaranteed that legs of the patient are stably placed in the surgery process, meanwhile, the auxiliary device can be used for adjusting and positioning the height of the legs of the patient, and medical staff can conveniently conduct surgical treatment on the patient; and the angle of the knee joint can be adjusted and positioned according to operation requirements, so that the auxiliary device is convenient to use.

The invention relates to a knee joint endoprosthesis (1) having a femoral component (10) for anchoring to a distal end of a femur and a tibial component (30) for anchoring to a proximal end of a tibia, wherein the femoral component and the tibial component each have a surface (17, 37) that is porous and / or has elevations and depressions. The invention further relates to a surgical kit for knee joint replacement.

This application relates to the field of medical device technology, specifically to an extramedullary positioning distal femoral osteotomy device for knee replacement, comprising an osteotomy plate, an axial indicator, a rotating component, and a reference plate. The osteotomy plate has a reference end face and an abutment end face, with a cutting suture and pin holes provided on the reference end face. The axial indicator is rotatably mounted on the reference end face; the rotating component is rotatably mounted on the reference end face; the reference plate is slidably mounted on the rotating component, and the reference plate can slide on the rotating component in a direction away from or close to the rotation axis of the rotating component, with the reference plate perpendicular to the reference end face. In this application, the axial indicator determines the direction of the patient's femoral axis, ensuring that the movement of the osteotomy plate is consistent with the direction of the femoral axis, thereby improving the accuracy of the cutting position during surgery. The rotating component and the reference plate allow the surgeon to adjust according to the preoperatively determined angle of the prosthesis articular surface, enabling precise matching of the cutting suture angle with the prosthesis articular surface, further improving the precision of the surgery.

The application discloses a hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment, relates to the technical field of medical rehabilitation, and discloses the hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment. The wearable sensor is used for monitoring patient motion data in real time and recognizing compensatory behavior. A training plan is dynamically adjusted in combination with multidimensional indexes, the problems of missing compensation recognition, feedback lag and plan rigidity in the traditional rehabilitation scheme are effectively solved, the rehabilitation effect can be improved, and the risk of adjacent joint injury can be reduced.

The utility model relates to a knee joint replacement support which comprises a side rail clamping device, a connecting device, a sliding rail, a sliding seat and a support body. The side rail clamp comprises a clamping block and a first locking bolt, and a side rail clamping opening and a height adjusting inserting opening are formed in the clamping block; a threaded hole communicated with the height adjusting insertion opening is formed in the clamping block, and the first locking bolt is connected into the threaded hole; the connecting device comprises a height adjusting insertion plate, a second locking bolt and a connecting plate; a threaded hole is formed in the middle of the side edge of the connecting plate, one end of a height adjusting insertion plate is inserted into the height adjusting insertion opening, a connecting hole is formed in the other end of the height adjusting insertion plate, a second locking bolt penetrates through the connecting hole to be connected with the threaded hole in the middle of the side edge of the connecting plate, and the height adjusting insertion plate is vertically fixed to the connecting plate; a sliding rail is fixedly connected to the upper face of the connecting plate, a sliding seat is connected to the sliding rail in a sliding mode, and a support is connected to the sliding seat in a rotating mode.

Robotic systems for orthopedic surgery are provided. The robotic systems may include at least first and second motors coupled to each other. An output shaft of one of the motors may be connectable to a surgical tool guide. An output shaft of another of the motors may be coupled to a portion of a ball and socket joint. A corresponding portion of the ball and socket joint may be coupled to a bone mount which may be attached to a bone to mount the first and second motors to bone for performing orthopedic surgical procedures.

A handheld three-axis swing saw type knee joint replacement robot system comprises a handheld instrument part and a navigation control part for guiding the handheld instrument part to accurately position and cut a target tissue in an operation, and the handheld instrument part further comprises an operation main body and a three-axis dynamic following mechanism; the three-axis dynamic following mechanism further cuts a tail end control unit, a rolling connection control unit and a pitching lifting control unit; the transverse rolling connection control unit is configured to enable the first fuselage to actively rotate around a transverse rolling shaft where the first fuselage is located relative to the second fuselage; the pitching lifting control unit is configured to enable the second fuselage to perform pitching angle control around a pitching shaft relative to the third fuselage and / or enable the second fuselage to perform lifting control relative to the third fuselage; the navigation control part is used for respectively controlling the cutting tail end control unit, the rolling connection control unit and the pitching lifting control unit to carry out three-degree-of-freedom joint motion of pitching, lifting and rolling so as to ensure the follow-up alignment operation of the operation execution part and the osteotomy surface.

The invention discloses a knee joint replacement flexion and extension balance graphical analysis method which comprises the following steps: drawing an inner side gap-outer side gap lattice diagram according to obtained force-gap width data of soft tissues around a knee joint of an inner side compartment and an outer side compartment at different flexion angles; a dot matrix projection relation of dot matrixes of the knee joint at different flexion angles on the tense side is selected to construct a quantitative evaluation index of the flexion and extension gap balance state; analyzing the influence of the knee joint soft tissue balance operation on the flexion and extension gap balance state through the constructed quantitative evaluation index to obtain the current flexion and extension gap balance state of the knee joint; and formulating an optimized adjustment strategy according to the current flexion and extension gap balance state of the knee joint and the expected target flexion and extension gap balance state. Graphical quantitative analysis is performed on the soft tissue tension in the knee joint replacement according to the force-gap data, so that an accurate and intelligent guidance intraoperative adjustment scheme is established for flexion and extension balance of knee joint replacement.

The invention provides a human body model for a knee joint replacement simulation operation, and relates to the field of human body models. The human body model for the knee joint replacement simulation operation comprises a base and a knee joint model, a driving motor is fixedly arranged at the midpoint of the bottom end face in the base, a driving shaft is fixedly arranged at the output end of the driving motor, a mounting seat is fixedly arranged at the upper end of the driving shaft, and an electric telescopic rod is fixedly arranged on one side of the outer wall of the mounting seat. A supporting mechanism is fixedly arranged at the midpoint of the upper end face of the mounting base and comprises a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are connected through a folding assembly to achieve 90-degree overturning, and the folding assembly comprises a first rotating shaft. According to the knee joint human body model, flat-lying type operation scene simulation can be achieved, the anthropomorphic bending and stretching effect can be achieved, and therefore operation of a replacement simulation operation and simulation judgment of operation success are facilitated.

The rehabilitation training device comprises a base, a lifting assembly, a supporting assembly, a fixing assembly and a remote controller, the lower end of the lifting assembly is installed on the upper surface of the base, the lower surface of the supporting assembly is installed at the upper end of the lifting assembly, and the lifting assembly is used for driving the supporting assembly to move in the vertical direction; the supporting assembly is used for supporting legs of a patient, the fixing assembly is installed on the supporting assembly and used for fixing the legs of the patient to the supporting assembly, and the lifting assembly is in communication connection with the remote controller. According to the rehabilitation training device used after knee joint replacement, the shank of a patient is placed on the supporting assembly and fixed through the fixing assembly, then the lifting assembly is controlled through the remote controller to drive the supporting assembly to move in the vertical direction, and therefore auxiliary rehabilitation exercise is conducted on the knee joint of the patient; the recovery of the patient is facilitated.

The present application discloses a novel knee joint soft tissue tension gap measuring device, which relates to the technical field of total knee replacement instruments. The measuring device comprises a measuring device rod body, a pressure gauge is installed at one end of the measuring device rod body, and the measuring device rod body comprises an air-containing cavity in the middle; a distance measuring component is arranged at one end of the measuring device rod body away from the pressure gauge, and the distance measuring component comprises a fixed plate and a movable plate parallel to the axis of the measuring device rod body, the movable plate is slidably connected to the measuring device rod body and the sliding direction is toward or away from the fixed plate, and the distance measuring component also comprises an air bag arranged between the fixed plate and the movable plate and driving the movable plate to move by filling and deflation; a driving mechanism for exchanging the gas in the air-containing cavity and the air bag is arranged on the measuring device rod body, and the pressure gauge is used to detect the air pressure inside the air bag.

A computer-implemented method for creating an activity-optimized cutting guides for surgical procedures includes receiving one or more pre-operative images depicting one or more anatomical joints of a patient, and creating a three-dimensional anatomical model of the one or more anatomical joints based on the one or more pre-operative images. One or more patient-specific anatomical measurements are determined based on the three-dimensional anatomical model. A statistical model of joint performance is applied to the patient-specific anatomical measurements to identify one or more cut angles for performing a surgical procedure. A patient-specific cutting guide is created that comprises one or more apertures positioned based on the one or more cut angles.

The invention discloses a knee joint osteotomy guide plate and a use method thereof, and relates to the field of knee joint replacement tools, the knee joint osteotomy guide plate comprises a thighbone osteotomy guide plate, the thighbone osteotomy guide plate comprises a thighbone guide plate main body and a thighbone insertion block, the thighbone guide plate main body and the thighbone insertion block are in insertion fit, and the thighbone guide plate main body is provided with a first binding surface, a first spicule fixing hole and a thighbone osteotomy groove; a second binding surface is arranged on the thighbone insertion block, and the first binding surface and the second binding surface are used for being attached to the thighbone surface or the thighbone osteophyte; the tibia osteotomy guide plate comprises a tibia guide plate main body and a tibia insertion block, the tibia guide plate main body and the tibia insertion block are matched in an inserted mode, the tibia guide plate main body is provided with a third attaching face, a second bone needle fixing hole and a tibia osteotomy groove, the tibia insertion block is provided with a fourth attaching face, and the third attaching face and the fourth attaching face are used for being attached to the tibia face or the tibia osteophyte; according to the osteotomy guide plate, an osteotomy plane is accurately positioned by utilizing a plurality of parts or osteophyte with obvious knee joint bone tissue characteristics, so that the osteotomy accuracy is improved, and the surgical risk can be reduced.

The utility model discloses a kind of knee joint replacement postoperative rehabilitation pressing devices, including stand, one end of the stand is movably connected with movable seat, one end of the movable seat is fixedly connected with lifting seat, the both sides of the lifting seat are movably connected with telescopic plate, one end of the telescopic plate is fixedly connected with boom, the utility model has beneficial effect, first power mechanism, second power mechanism, third power mechanism and inflation mechanism are respectively driven by controller to operate, so that two groups of fixed rods can be clamped to the calf and thigh in the air, its knee is located in the just below lifting seat, finally again through first power mechanism drive lifting seat slowly lift, lifting lifting seat pushes the lifting of hanged clamping seat, clamping seat drives the lifting of connected clamping plate, clamping plate can repeatedly press the leg of clamping, structure is reasonable, it is convenient for automatic pressing of leg, less manual labor, it is convenient to adjust simultaneously, it is convenient for different body size patient to be clamped and pressed.

1. Name of the Design Product: Osteotomy Protection Tool. 2. Use of the Design Product: Used for osteotomy protection during knee joint replacement surgery, especially for osteotomy protection during unicompartmental replacement surgery. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The invention relates to the technical field of intelligent rehabilitation devices, in particular to a knee joint replacement postoperative lower limb rehabilitation training system based on somatosensory interaction. Comprising a posture supporting device capable of being arranged to be in a lying or side lying state, an infrared rehabilitation mechanism used for conducting microcirculation adjustment on lower limbs before rehabilitation, a sensing detection mechanism used for providing motion resistance, a physical sign obtaining mechanism used for obtaining physical sign information and a somatosensory obtaining mechanism used for obtaining dynamic motion data. The rehabilitation analysis mechanism is connected with the physical sign acquisition mechanism and the somatosensory acquisition mechanism; and the processor is used for determining microcirculation setting parameters based on the acquired physical signs and somatosensory data, determining a single motion period according to motion resistance changes, extracting real-time motion resistance and joint vibration signals under corresponding actions based on the single motion period to determine a motion fatigue attenuation coefficient, and determining rehabilitation progress according to the motion fatigue attenuation coefficient. The motion resistance is intelligently adjusted based on multiple sensing data, and the rehabilitation efficiency of a user can be improved.

The utility model discloses a hip and knee joint replacement postoperative rehabilitation training device which comprises an L-shaped front support formed by connecting a front outer cross rod and a front outer vertical rod and an L-shaped rear support formed by connecting a rear outer cross rod and a rear outer vertical rod, and the inner side of the front support is connected with the inner side of the rear support through a thick connecting rod. A front inner cross rod and a rear inner cross rod are installed in the front outer cross rod and the rear outer cross rod in a drawing and inserting mode respectively, the other end of the front inner cross rod and the other end of the rear inner cross rod are connected through a first connecting rod, a front inner vertical rod and a rear inner vertical rod are installed in the front outer vertical rod and the rear outer vertical rod in a drawing and inserting mode respectively, and the other end of the front inner vertical rod and the other end of the rear inner vertical rod are connected through a second connecting rod. The front sides and the rear sides of the first connecting rod and the second connecting rod are hinged to the front telescopic rod and the rear telescopic rod respectively, and a nylon cloth piece is arranged between the front telescopic rod and the rear telescopic rod. According to the utility model, the postoperative rehabilitation training process of a patient can be standardized, so that the patient can effectively perform rehabilitation exercise after leaving a hospital; more labor is saved when the patient exercises, and the rehabilitation effect of the patient is improved.

The present invention discloses a tibia (2) rotation alignment positioning device in total knee replacement surgery, which comprises, from left to right, a side rod one (3), a bottom rod (5), a support block (6), and a side rod two (4); the bottom rod (5) is parallel to the length direction of the support block (6) and fixed to the lower part of the support block (6); the lower ends of the side rod one (3) and the side rod two (4) are respectively fixed to the two ends of the bottom rod (5); and the side rod one (3) and the side rod two (4) are perpendicular to the support block (6). 6) length direction; a cross bar (7) is fixed on the top of the support block (6), and the cross bar (7) is arranged parallel to the bottom bar (5); a slide bar (8) is slidably fixed on the cross bar (7), and the length direction of the slide bar (8) is perpendicular to the length direction of the cross bar (7), and a positioning nail (9) passes through the upper ends of the side bar (3) and the side bar (4) to fix the upper ends of the side bar (3) and the side bar (4) to the corresponding points of the medial epicondyle concave and the lateral epicondyle convex of the femur (1). The rotation alignment positioning device of the present invention enables the rotation alignment to be obtained accurately, the method is simple, and solves the problem that the rotation alignment cannot be simply drawn in the existing medicine.

The invention provides a prosthesis taking-out device for a knee joint replacement revision operation based on a high-frequency electrotome, and belongs to the technical field of medical instruments. Comprising a high-frequency electrotome pen head, the top end of the high-frequency electrotome pen head is fixedly connected with a high-frequency electrotome pen body, the top end of the high-frequency electrotome pen body is provided with a connecting plate, the connecting plate is provided with a first negative pressure pipe, the first negative pressure pipe penetrates through the connecting plate, and the top end of the high-frequency electrotome pen body is in threaded connection with a fixing cap; the fixing cap is movably connected with the first negative pressure pipe in a sleeved mode, and the fixing cap is located at the top end of the high-frequency electric knife pen body and attached to the connecting plate. According to the high-frequency electrotome pen, the high-frequency electrotome pen head is arranged, bone cement is subjected to hot melting by heating a prosthesis, the stripping difficulty of the main bone of a prosthesis patient is lowered, the requirements for operation experience and the technology are lowered, and the high-frequency electrotome pen has the advantages of being simple in structure, convenient to use and high in practicability. The suction assembly sucks the hot-melted bone cement.

The utility model relates to the technical field of hip and knee joint replacement postoperative recovery instruments, and provides a quadriceps femoris contraction exercise prompter which comprises a patella sleeve, a sounder, an air bag, a pressure recorder and a counter, the air bag, the pressure recorder and the counter are arranged on the patella sleeve, the air bag corresponds to popliteal fossa, an air outlet nozzle is arranged on the air bag, and the sounder is detachably arranged in the air outlet nozzle. According to the quadriceps femoris training device, the patella sleeves are arranged on the legs to fix the air bags on the popliteal fossa of the patient, when the patient performs quadriceps femoris training, the knees exert force downwards to exert pressure on the air bags, after the air bags are contracted, prompt sound is given out through the sounder, and therefore the effect that the patient can be informed whether the action is qualified or not without accompanying of family members is achieved; meanwhile, the number of times of compression of the air bag is counted through the counter so as to judge the number of times of exercise of the patient, medical staff can conveniently judge the effectiveness of quadriceps femoris exercise, rehabilitation of the patient is promoted, the self-protection capacity of the patient is improved, and the labor cost is reduced.