CN211187302U - Gap-adjustable knee joint pressure measuring device for total knee joint replacement - Google Patents
Gap-adjustable knee joint pressure measuring device for total knee joint replacement Download PDFInfo
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- CN211187302U CN211187302U CN201921817545.6U CN201921817545U CN211187302U CN 211187302 U CN211187302 U CN 211187302U CN 201921817545 U CN201921817545 U CN 201921817545U CN 211187302 U CN211187302 U CN 211187302U
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 100
- 210000002303 tibia Anatomy 0.000 claims abstract description 83
- 238000012360 testing method Methods 0.000 claims abstract description 72
- 210000000689 upper leg Anatomy 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 33
- 230000008719 thickening Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 11
- 210000000988 bone and bone Anatomy 0.000 claims description 10
- 238000001356 surgical procedure Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 5
- 238000013150 knee replacement Methods 0.000 claims description 5
- 238000011883 total knee arthroplasty Methods 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000009530 blood pressure measurement Methods 0.000 abstract description 19
- 210000001694 thigh bone Anatomy 0.000 abstract description 5
- 210000004872 soft tissue Anatomy 0.000 description 11
- 238000010030 laminating Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 208000012659 Joint disease Diseases 0.000 description 2
- 208000003947 Knee Osteoarthritis Diseases 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 208000006820 Arthralgia Diseases 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a gap-adjustable knee joint pressure measuring device for total knee joint replacement, which comprises a tibia keel processing tool and a pressure measuring device, wherein the pressure measuring device comprises a push block, a femur test pad and a tibia test pad, the shape of the tibia keel processing tool is matched with a tibia osteotomy surface, and the front part of the upper surface of the push block is inclined downwards to form a supporting inclined surface; the tibia test pad comprises a tibia pad body, a longitudinal rod, a handle, a push rod, a digital display screen, a push block guide groove, two guide columns and two elastic positioning columns, wherein the tibia pad body, the longitudinal rod and the handle are sequentially connected from front to back, and the push block is arranged in the push block guide groove in a back-and-forth movable mode. The utility model discloses a clearance adjustable knee joint replacement art knee joint pressure measurement device, simple structure, it is easy to use and wash, through the thickness of the steerable pressure measuring device in position of the interior ejector pad of adjustment pressure measuring device, and then detect thighbone inboard and outside condyle pressure under the corresponding thickness.
Description
Technical Field
The utility model relates to a clearance adjustable knee joint pressure measuring device for total knee joint replacement.
Background
In knee joint diseases, osteoarthritis of the knee joint caused by degeneration of the knee joint is a major cause of pain in the legs and feet of elderly patients. As the population ages more and more, the number of patients suffering from knee osteoarthritis is increasing. In the aspect of knee joint treatment, total knee joint replacement is one of the more successful surgical methods for treating knee joint diseases at present, a femoral prosthesis is used for replacing the surface of a femur in the surgery, a tibial prosthesis and a tibial gasket are used for replacing the surface of a tibia, and the contact surface between the femoral prosthesis and the tibial gasket forms the knee joint plane after the surgery. The total knee joint replacement can relieve the knee joint pain of the patient and greatly improve the life quality of the patient. However, the difficulty of the total knee replacement operation is self evident as a complicated joint of the human body. In addition to accurate osteotomy, proper ligament release and soft tissue balance are critical to the operation, so special attention must be paid to the release of soft tissue around the tibial plateau during the operation to ensure that the knee joint has proper tightness and the lateral pressures are as equal as possible. However, in the current knee joint replacement surgery process, the method for judging whether the implanted prosthesis meets the soft tissue balance by a doctor only depends on experience and hand feeling, which causes the culture period of the total knee joint replacement surgery doctor to be overlong and brings unstable factors and certain risks to the surgery.
Chinese patent (CN101884542B) discloses a pressure balance measuring system for artificial knee joint replacement, which comprises a pressure acquiring device and a signal receiving and displaying device. The pressure acquisition device comprises a closed shell, an upper stress plane, a lower support plane, a sensor array and a circuit board, wherein the upper stress plane, the lower support plane, the sensor array and the circuit board are arranged in the closed shell. The sensor array is positioned on the circuit board and consists of more than three sensors, the circuit board in the middle of the more than three sensors is provided with a cavity, and the upper stress plane and the lower support plane are tightly combined with the more than three sensors around the cavity through the cavity. The shape and the size of the pressure acquisition device are the same as those of a tibial gasket in the artificial knee joint prosthesis. When proximal tibial osteotomy is completed in the total knee replacement surgery process, the device is placed at the knee joint of a patient, wherein the pressure acquisition device acquires a pressure signal, the signal receiving and displaying device performs force processing on the received pressure signal, and then the pressure distribution condition is displayed in the form of a three-dimensional pressure diagram, so that the stress condition of the tibial gasket of the artificial knee joint of the patient can be provided for a doctor in real time. After pressure equalization, the device is removed and placed in the appropriate tibial insert.
The prior art has the following disadvantages:
(1) in the current operation process, part of operation personnel usually adopt the tension of the inner and outer soft tissues of the knee joint experienced bare-handed feeling when the knee joint is straightened and bent by 90 degrees, and instability is brought to the soft tissue balance.
(2) In the device for assisting soft tissue balance in the market, the thickness of a tibial gasket test mould can not be adjusted, if a tibial gasket with a certain thickness is not suitable for a knee joint after osteotomy, the tibial gasket needs to be taken out and put in another tibial gasket with another thickness again for testing, and the complexity of an operation is increased.
(3) The signal receiving and displaying device in the knee joint pressure measuring device for the total knee joint replacement operation mentioned in some patents needs to be externally connected with a computer display screen and a host, so that the equipment is huge and redundant, and the limited space of an operating room is occupied.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's defect, providing a clearance adjustable total knee joint replacement art knee joint pressure measurement device, simple structure uses and washs easily, has avoided too much redundant equipment to occupy the operating room space.
The technical scheme for realizing the purpose is as follows: a gap-adjustable knee joint pressure measuring device for total knee joint replacement comprises a tibia keel processing tool and a pressure measuring device, wherein the pressure measuring device comprises a push block, a femur test pad and a tibia test pad; wherein:
the shape of the tibia keel processing tool is matched with a tibia osteotomy surface, the upper surface of the tibia keel processing tool is an installation surface, the tibia keel processing tool is provided with two positioning holes and four bone nail positioning holes, the two positioning holes are arranged in a left-right manner, the four bone nail positioning holes are symmetrically arranged on the left and right parts of the tibia keel processing tool in pairs, and each positioning hole is located between the corresponding two bone nail positioning holes;
the front part of the upper surface of the push block is obliquely arranged downwards to form a supporting inclined plane; the rear end of the push block is provided with a connecting rod, and the rear end of the connecting rod is provided with a push rod jack;
the femur test pad is provided with two guide holes which are communicated up and down, and the two guide holes are arranged left to right; the front part of the lower surface of the femur test pad is provided with a trapezoidal guide block, the rear surface of the trapezoidal guide block is a supported inclined plane, the left side surface and the right side surface of the trapezoidal guide block are guide side surfaces, and the bottom end of the trapezoidal guide block is provided with a button switch; the upper surface of the femur test pad is a femur supporting surface, and a plurality of pressure sensors are arranged on the femur supporting surface; the femur test pad is internally provided with a Bluetooth/wireless data transmitter and a first power supply battery pack connected with the Bluetooth/wireless data transmitter; the button switch is connected with the first power supply battery pack;
the tibia test pad comprises a tibia pad body, a longitudinal rod, a handle, a push rod, a digital display screen, a push block guide groove, two guide posts and two elastic positioning posts, wherein the tibia pad body, the longitudinal rod and the handle are sequentially connected from front to back, and the push block guide groove is longitudinally arranged in the middle of the upper surface of the tibia pad body; the two guide columns are respectively arranged on the upper surface of the tibia pad body and are respectively arranged on the left side and the right side of the guide groove of the push block; the two elastic positioning columns are respectively arranged on the lower surface of the tibia pad body and are located right below the two guide columns in a one-to-one correspondence manner; the lower surface of the tibia pad body is a tibia pressing surface; the digital display screen is arranged on the longitudinal rod; the push rod is arranged at the front end of the handle in a manner of moving back and forth, and is positioned above the digital display screen; the digital display screen, the thinning button, the thickening button, the linear motion device, the signal receiver, the position detection sensor and the second power supply battery pack are respectively connected with the controller, and the linear motion device is connected with the push rod; the power switch button is connected with the second power supply battery pack; the thickness value, the left side pressure and the right side pressure are displayed on the digital display screen;
the femur test pad, the push block, the tibia test pad and the tibia keel treatment tool are sequentially arranged from top to bottom; the push block is arranged in a push block guide groove of the tibia test pad in a manner of moving back and forth, the two guide columns of the tibia test pad are correspondingly inserted into the two guide holes of the femur test pad one by one, and the supporting inclined plane of the push block is abutted against the supported inclined plane of the trapezoidal guide block; the two elastic positioning columns of the tibia test pad are correspondingly inserted into the two positioning holes of the tibia keel processing tool one by one, and each elastic positioning column is in interference fit with the corresponding positioning hole.
The gap-adjustable knee joint pressure measuring device for the total knee joint replacement surgery is characterized in that the left side and the right side of the push block are push block side guide surfaces, and the bottom of the push block is a push block bottom guide surface; the push rod jack comprises a guide hole, a first step hole, a yielding hole and a second step hole which are sequentially connected from back to front, an elastic notch is longitudinally formed in the push rod jack, and the elastic notch divides the push rod jack into an upper part and a lower part.
Foretell full knee joint replacement art knee joint pressure measuring device of adjustable clearance, wherein, the front end of push rod includes location terminal surface, direction inclined plane, first step face, the cylinder of stepping down and the second step face that links to each other in proper order after to in the past, the front end of push rod inserts in the push rod jack, just second step hole and first step face contact form first spacing step, first step hole and second step face contact form the spacing step of second.
The utility model provides an foretell full knee joint replacement art knee joint pressure measuring device of adjustable clearance, wherein, the both sides cell wall of ejector pad guide slot is ejector pad guide slot leading flank, the tank bottom of ejector pad guide slot is ejector pad guide slot direction bottom surface, the ejector pad is followed ejector pad guide slot seesaw, just ejector pad side spigot surface and the laminating of corresponding ejector pad guide slot spigot flank, ejector pad bottom spigot surface with the laminating of ejector pad guide slot leading flank surface.
The knee joint pressure measuring device for the total knee joint replacement with the adjustable gap is characterized in that each elastic positioning column is vertically provided with a positioning column notch.
The knee joint pressure measuring device for the total knee joint replacement with the adjustable gap is characterized in that the pressure sensors collect pressure data of the left side and the right side of the femoral test pad, and the collected pressure data are transmitted to the signal receiver through the Bluetooth/wireless data transmitter;
the signal receiver transmits the received pressure data to the controller, the controller processes the received pressure data and outputs the processed pressure data to the digital display screen, left side pressure and right side pressure are displayed on the digital display screen, and the left side pressure data and the right side pressure data displayed on the digital display screen are pressure mean values of the left side and the right side of the femoral trial mat respectively;
the thickening button is used for sending a forward movement signal to the controller, and the thinning button is used for sending a backward movement signal to the controller; the controller controls the linear motion device to make corresponding linear motion according to the received forward motion signal or the backward motion signal, and further controls a push rod connected with the linear motion device to make forward and backward motion; the front end of the push rod is inserted into the push rod jack and then drives the push block to move back and forth along the push block guide groove; the supporting inclined plane of the pushing block is attached to the supported inclined plane of the trapezoidal guide block to move back and forth, so that the femur test pad is driven to move up and down along the guide column, the height distance between the femur test pad and the tibia pad body is adjusted, and the thickness value of the pressure measuring device is adjusted;
the position detection sensor detects the back-and-forth movement distance of the linear mover and transmits the back-and-forth movement distance data to the controller; and the controller converts the forward and backward movement distance data into a thickness dimension and outputs the thickness dimension to the digital display screen for display, and a thickness value is displayed on the digital display screen, wherein the thickness value is the thickness value of the pressure measuring device.
The utility model provides an foretell total knee joint replacement art knee joint pressure measuring device of adjustable clearance, wherein, the thickness value default of pressure measurement device is 10mm, increases 2mm per thickening button, reduces 2mm per thinning button, the specification of the thickness value of pressure measurement device has 10mm, 12mm, 14mm, 16mm, 18mm and 20 mm.
The knee joint pressure measuring device for the total knee joint replacement with the adjustable gap is characterized in that the first power supply battery pack and the second power supply battery pack adopt wireless rechargeable battery packs.
The gap-adjustable knee joint pressure measuring device for the total knee joint replacement surgery is characterized in that the first power supply battery pack supplies power to the Bluetooth/wireless data transmitter, and the second power supply battery pack supplies power to the digital display screen, the linear motion device, the signal receiver, the position detection sensor and the controller.
The gap-adjustable knee joint pressure measuring device for the total knee joint replacement surgery is characterized in that the supporting inclined plane of the push block is attached to the supported inclined plane of the trapezoidal guide block to form a thrust inclined plane, and the installation surface of the tibial keel processing tool is attached to the tibial pressing surface of the tibial pad body to form a positioning end surface.
The utility model discloses a clearance adjustable knee joint replacement art knee joint pressure measurement device, the beneficial effect who compares with prior art embodies:
(1) the pressure sensor and the signal receiving device are used for quantifying the internal and external pressures of the knee joint, so that the uncertainty of the bare-handed feeling of the tension of the soft tissue of the knee joint is reduced;
(2) the thickness of the pressure measuring device can be adjusted by simply pressing the thickening or thinning button, so that the trouble of repeatedly taking out and putting tibial gaskets with different thicknesses into the pressure measuring device for testing is avoided;
(3) the thighbone is tried to be equipped with bluetooth data transmitter/wireless data transmitter and power supply battery group in filling up, and bluetooth data transmitter/wireless data transmitter will gather data transfer to the signal receiver that the shin bone was tried to fill up and show on the digital display screen of integration, and the digital display screen can show pressure measurement device thickness, the inboard and the lateral pressure of knee joint (be left side pressure and right side pressure), and the display mode of the pressure numerical value of this device is light directly perceived, has avoided too much redundant equipment to occupy the operating room space.
Drawings
FIG. 1 is a structural diagram of a knee joint pressure measuring device for total knee joint replacement of the present invention;
fig. 2 is a schematic structural view of a tibial keel processing tool;
FIG. 3 is a schematic structural view of a pressure measuring device;
FIG. 4 is a side view of a push block of the pressure measuring device;
FIG. 5 is a rear view of a push block of the pressure measuring device;
FIG. 6 is a schematic view of the femoral trial pad of the pressure measurement device;
FIG. 7 is a vertical cross-sectional view of a femoral trial pad of the pressure measurement device;
fig. 8 is a perspective view (top view) of a tibial test pad of the pressure measurement device;
fig. 9 is a perspective view (bottom view direction) of the tibial test pad of the pressure measuring device;
FIG. 10 is an enlarged partial view of the push rod of the tibial trial pad of the pressure measurement device;
FIG. 11 is a view showing a state of use of the pressure measuring device;
FIG. 12 is a diagram illustrating a state of the knee joint pressure measuring device for total knee joint replacement of the present invention;
fig. 13 is a schematic circuit diagram of the knee joint pressure measuring device for total knee joint replacement of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is provided with reference to the accompanying drawings:
referring to fig. 1, 2 and 3, the preferred embodiment of the present invention is a knee joint pressure measuring device for total knee replacement with adjustable gap, which comprises a tibial keel processing tool B and a pressure measuring device a, wherein the pressure measuring device a comprises a push block 1, a femoral test pad 2 and a tibial test pad 3.
Referring to fig. 2, the shape of the tibial keel processing tool B is adapted to the tibial osteotomy surface, the upper surface of the tibial keel processing tool B is an installation surface B2, the tibial keel processing tool B is provided with two positioning holes B1 and four bone nail positioning holes B3, the two positioning holes B1 are arranged left and right, the four bone nail positioning holes B3 are symmetrically arranged on the left and right of the tibial keel processing tool B in pairs, and each positioning hole B1 is located between the corresponding two bone nail positioning holes B3.
Referring to fig. 4 and 5, the front portion of the upper surface of the push block 1 is inclined downward to form a support inclined surface 103; the left side and the right side of the push block 1 are push block side guide surfaces 101, and the bottom of the push block 1 is a push block bottom guide surface 102; the rear end of the push block 1 is provided with a connecting rod 109, and the rear end of the connecting rod 109 is provided with a push rod jack 110; the push rod insertion hole 110 comprises a guide hole 105, a first stepped hole 106, a abdicating hole 107 and a second stepped hole 108 which are sequentially connected from back to front, an elastic notch 104 is longitudinally arranged on the push rod insertion hole 110, and the push rod insertion hole 110 is divided into an upper part and a lower part by the elastic notch 104.
Referring to fig. 6 and 7, two guiding holes 201 are formed in the femoral trial pad 2, and the two guiding holes 201 are arranged in a left-right manner; the front part of the lower surface of the femur test pad 2 is provided with a trapezoidal guide block 206, the rear surface of the trapezoidal guide block 206 is a supported inclined surface 202, the left side surface and the right side surface of the trapezoidal guide block 206 are guide side surfaces 203, and the bottom end of the trapezoidal guide block 206 is provided with a button switch 204; the upper surface of the femur test pad 2 is a femur supporting surface 205, and a plurality of pressure sensors 401 are arranged on the femur supporting surface 205; a Bluetooth/wireless data transmitter 402 and a first power supply battery pack 403 connected with the Bluetooth/wireless data transmitter are installed in the femur test pad; the push button switch 204 is connected to a first power supply battery pack 403 (see fig. 13).
Referring to fig. 8, 9 and 10, the tibial test pad 3 includes a tibial pad body 315, a longitudinal rod 316, a handle 301, a push rod 305, a digital display screen 320, a push block guide groove 317, two guide posts 309 and two elastic positioning posts 312, the tibial pad body 315, the longitudinal rod 316 and the handle 301 are sequentially connected from front to back, and the push block guide groove 317 is longitudinally arranged in the middle of the upper surface of the tibial pad body 315; the two guide posts 309 are respectively arranged on the upper surface of the tibial pad body 315, and the two guide posts 309 are respectively arranged on the left side and the right side of the push block guide groove 317; the two elastic positioning columns 312 are respectively arranged on the lower surface of the tibia pad body 315, and the two elastic positioning columns 312 are located right below the two guiding columns 309 in a one-to-one correspondence manner; the lower surface of the tibial pad body 315 is a tibial stitching surface 311; the digital display screen is arranged on the vertical rod 316; the push rod 305 is arranged at the front end of the handle 301 in a manner of moving back and forth, and the push rod 305 is positioned above the digital display screen; the thickness value 304, the left pressure 306 and the right pressure 307 are displayed on the digital display screen 320. The two side walls of the push block guide groove 317 are the guide side surfaces 310 of the push block guide groove, the bottom of the push block guide groove 317 is the guide bottom surface 310 of the push block guide groove,
a signal receiver 404, a controller 405(CPU), a linear motion device 406, a position detection sensor 407 and a second power supply battery pack 408 are arranged in the handle 301, a power switch button 314 is arranged at the rear end of the handle 301, a thinning button 302 and a thickening button 303 are arranged at the upper end of the handle 301, a digital display screen, the thinning button 302, the thickening button 303, the linear motion device 406, the signal receiver 404, the position detection sensor 407 and the second power supply battery pack 408 are respectively connected with the controller 405, and the linear motion device 406 is connected with the push rod 305; the power switch button 314 is connected to the second power supply battery pack 408.
Referring to fig. 10 and 11, the front end of the push rod 305 includes a positioning end surface 305a, a guiding inclined surface 305b, a first step surface 305c, a receding cylinder 305d and a second step surface 305e, which are sequentially connected from front to back, when the push rod 305 moves forward, the front end of the push rod 305 is inserted into the push rod insertion hole 110, the guiding inclined surface 305b has a guiding function, so that the push rod insertion hole 110 is conveniently inserted, when the push rod is inserted into the first step hole 106, because the diameter of the first step hole 106 is smaller than the diameters of the first step surface 305c and the second step surface 305e, the elastic notch 104 is expanded until the second step hole 108 contacts the first step surface 305c, and at this time, the first step hole 106 contacts the second step surface 305 e; and the second stepped hole 108 contacts with the first stepped surface 305c to form the first limit step 13, and the first stepped hole 106 contacts with the second stepped surface 305e to form the second limit step 14. The two-step fit enables the push rod 305 to drive the push block 1 to move in two directions.
Referring to fig. 1, 11 and 12, the femur test pad 2, the push block 1, the tibia test pad 3 and the tibia keel processing tool B are sequentially arranged from top to bottom; the push block 1 is arranged in the push block guide groove 317 in a back-and-forth movement mode, the push block 1 moves back and forth along the push block guide groove 317, the push block side guide surface 101 is attached to the corresponding push block guide groove guide side surface 309 to form a guide side surface 17, and the push block bottom guide surface 102 is attached to the push block guide bottom surface 310 to form a guide bottom surface 12. The two guide columns 309 of the tibia test pad 3 are correspondingly inserted into the two guide holes 201 of the femur test pad 4 one by one, and the support inclined plane 103 of the push block 1 is abutted against the supported inclined plane 202 of the trapezoid guide block; two elastic positioning columns 312 of the tibia trial pad 3 are correspondingly inserted into two positioning holes B1 of the tibia keel processing tool B one to one, each elastic positioning column 312 is in interference fit with a corresponding positioning hole B1, a positioning column notch 313 is vertically formed in each elastic positioning column 312, the positioning column notches 313 enable the elastic positioning columns 312 to have certain elasticity when inserted into the positioning holes B1 and can be tightly matched without gaps, and the tibia trial pad 3 cannot fall off from the tibia keel processing tool B due to the effect of elastic force. The supporting inclined plane 103 of the push block 1 is attached to the supported inclined plane 202 of the trapezoidal guide block to form a thrust inclined plane 11, and the mounting surface B2 of the tibial keel processing tool B is attached to the tibial pressing surface 311 of the tibial pad body to form a positioning end surface 16.
The utility model discloses a clearance adjustable knee joint replacement knee joint pressure measuring device, ejector pad 1, thighbone examination pad 2, each fitting surface that frock B formed is handled to shin bone examination pad 3 and shin bone fossil fragments, support inclined plane 103 and the laminating of the inclined plane 202 that is propped of trapezoidal guide block of ejector pad 1 form thrust inclined plane 11, installation face B2 and the laminating of shin bone laminating face 311 of shin bone pad body of shin bone fossil fragments processing frock B form location terminal surface 16, second step hole 108 forms first spacing step 13 with the contact of first step face 305c, first step hole 106 forms second spacing step 14 with the contact of second step face 305e, ejector pad side guide surface 101 forms leading flank 17 with the laminating of corresponding ejector pad guide slot leading flank 309, ejector pad bottom guide surface 102 forms direction bottom surface 12 with ejector pad guide slot leading bottom surface 310 laminating; the matching relationship between the elastic positioning column 312 and the positioning end face 16 enables the tibia test pad 3 to be accurately positioned on the tibia keel processing tool B, and the tibia test pad 3 cannot fall off from the tibia keel processing tool B due to the action of elastic force; the first limit step 13 and the second limit step 14 enable the linear motion module of the tibia test pad 3 to transmit power to the push block 1 through the push rod 305; the guide bottom surface 12 and the guide side surface 17 enable the push block 1 to move back and forth only along the two guide surfaces; the guide posts 309 allow the femoral trial pad 2 to move only up and down.
Referring to fig. 13, pressure sensors 401 collect pressure data of the left and right sides of the femoral trial pad, and transmit the collected pressure data to a signal receiver 404 through a bluetooth/wireless data transmitter 402; the pressure data of the left and right sides of the femoral trial pad correspond to the medial and lateral pressure of the knee joint.
The signal receiver 404 transmits the received pressure data to the controller 405, the controller 405 processes the received pressure data and outputs the processed pressure data to the digital display screen 320, the digital display screen 320 displays the left pressure 306 and the right pressure 307, and the left pressure data and the right pressure data displayed on the digital display screen 320 are the pressure mean values of the left side and the right side of the femoral trial mat respectively.
The thickening button 303 is used for sending a forward movement signal to the controller 405, and the thinning button 302 is used for sending a backward movement signal to the controller 405; the controller 405 controls the linear motion device 406 to make a corresponding linear motion according to the received forward motion signal or the received backward motion signal, and further controls the push rod 305 connected with the linear motion device 406 to make a forward and backward motion; the front end of the push rod 305 is inserted into the push rod insertion hole 110 and then drives the push block 1 to move back and forth along the push block guide groove 317; the supporting inclined plane of the pushing block 1103 moves back and forth along the supporting inclined plane 202 of the trapezoidal guide block 206, so as to drive the femur test pad 2 to move up and down along the guide column 309, adjust the height distance between the femur test pad 2 and the tibia pad body 315, and further adjust the thickness value of the pressure measuring device a.
The position detection sensor 407 detects the forward and backward movement distance of the linear mover 406 and transmits forward and backward movement distance data to the controller 405; the controller 405 converts the forward and backward movement distance data into a thickness dimension and outputs the thickness dimension to the digital display screen 320 for display, and the thickness value 304, namely the thickness value of the pressure measuring device a, is displayed on the digital display screen 320.
The default that leaves the factory of pressure measurement device A's thickness value is 10mm, can make the linear motion ware 406 in the handle 301 promote ejector pad 1 forward motion through pressing thickening button 303, make pressure measurement device A's thickness value increase to 12mm, increase 2mm according to thickening button 303 once, the thickness specification that this pressure measurement device A supports has 10mm, 12mm, 14mm, 16mm, 18mm and 20mm, the thickness specification that tries to fill up with traditional knee joint is identical completely. If the thickness is larger than 10mm, the thickness of the small part I is needed to be used, only the thinning button 302 needs to be pressed, and the linear motion device 406 drives the push block 1 to move backwards once when the thinning button 302 is pressed once, so that the thickness of the pressure measuring device A is reduced by 2 mm.
The first power supply battery pack 403 and the second power supply battery pack 408 employ wireless charging battery packs. The first power supply battery pack 403 supplies power to the bluetooth/wireless data transmitter 402, and the second power supply battery pack 408 supplies power to the digital display screen 320, the linear motion device 406, the signal receiver 404, the position detection sensor 407, and the controller 405.
The utility model discloses a clearance adjustable knee joint replacement art knee joint pressure measurement device, when using, the flow is as follows:
(1) sterilizing the pressure measuring device A according to the preoperative sterilization requirement of the surgical tool;
(2) after proximal tibial osteotomy is completed, the knee joint is in a 90-degree flexion state, and the tibial keel processing tool B is fixed on the tibial osteotomy surface through four bone nails;
(3) pressing the button switch 204 of the femur test pad 2 and the power switch button 314 of the tibia test pad 3;
(4) inserting the elastic positioning column 312 of the tibial test pad 3 into the positioning hole B1 of the tibial keel processing tool B until the tibial pressing surface 311 is attached to the mounting surface B2;
(5) inserting the push block 1 along the direction of the guide bottom surface 12 and the guide side surface 17 until the push rod 305 is completely inserted into the guide hole 105, and after the push block 1 and the tibia test pad 3 are assembled, the linear motion device 406 in the tibia test pad 3 can push the push block 1 forwards or pull the push block 1 backwards; the push block 1 moves back and forth along the guide bottom surface 12 and the guide side surface 17;
(6) inserting the guide hole 201 of the femur test pad 2 along the guide column 309, and the pressure measuring device A can be normally used after being assembled;
(7) at the moment, the thickness value displayed by the thickness value 304 of the digital display screen is 10mm, and the 10mm is a factory default value and is also the minimum size of the traditional knee joint test pad; the pressure sensor groups on the left side and the right side of the femur supporting surface 205 transmit the acquired data to the signal receiver 404 through the Bluetooth/wireless data transmitter 402 in the femur test pad 2, and after calculation processing is performed by the internal controller 405, the calculated data are output to the left side pressure 306 and the right side pressure 307 of the digital display screen, and the two positions show the pressure mean values respectively received by the inner side and the outer side of the femur condyle;
when the pressure data on the left side pressure 306 and the right side pressure 307 are not reasonable, the balance of the soft tissue is improper or the thickness of the A pressure measuring device is improper;
if the thickness needs to be increased, the thickening button 303 is only needed to be pressed once, after the controller 405 receives a signal of the button, the linear motion device 406 is commanded to move once, the push rod 305 pushes the push block 1 to move forward once, and the push block 1 moves forward once under the guiding action of the guide bottom surface 12 and the guide side surface 17; the push block 1 transmits the motion to the thrust inclined plane 11, the acting force F of the push block 1 on the femoral test pad 2 is vertical to the thrust inclined plane 11 and upwards, two component forces of the F are respectively F2 parallel to the motion direction of the push block 1, and the F1 along the direction of the guide column 309, so that the femoral test pad 2 can only move upwards along the guide column 309 once under the action of the F1 due to the constraint of the guide column 309; the position detection sensor 407 in the handle 301 can detect the front and back positions of the push rod 305, transmit the data to the controller 405, convert the data into the thickness size after calculation by the controller 405, and display the thickness value 304 on the digital display screen. Similarly, if the pressure measuring device a needs to be thinned, the thinning button 302 is only needed to be pressed once, the push rod 305 drives the push block 1 to move backwards along the guide bottom surface 12 and the guide side surface 17, and due to the fact that the supported inclined surface 202 of the femoral test pad 2 loses the supporting surface, the push rod will move downwards along the guide column 309 until the push rod contacts with the supporting inclined surface 103 under the action of gravity, so that the thickness of the pressure measuring device a is thinned, and the value on the thickness value 304 of the digital display screen is correspondingly updated;
the motion relation enables the linear motion device 406 of the tibia test pad 3 to convert the front and back linear motion into the vertical motion of the femur test pad 2 through the thrust inclined plane 11, so that the purpose of automatically changing the thickness of the pressure measuring device A is achieved; and the controller 405 in the tibia test pad 3 can also calculate and process the received pressure data of the left and right sides of the femur test pad 2, calculate an average value, and display the average value on a display screen, so that the pressure data is quantized.
(8) And changing the angle of the knee joint to the straightening position, and measuring the pressure values of the inner side and the outer side of the knee joint again to determine the soft tissue balance scheme under the straightening position. And after the use, the pressure measuring device A is taken out, and the power supply of the femur test pad 2 and the tibia test pad 3 is turned off.
The utility model discloses a clearance adjustable knee joint replacement art knee joint pressure measurement device, pressure measuring device A's thickness accessible is simply pressed thickening or attenuate button and is adjusted, has avoided taking out repeatedly and has put into different thickness shin bone gaskets again and carry out experimental trouble. The utility model discloses a measuring device's pressure numerical value's display mode is light directly perceived, has avoided too much redundant equipment to occupy the operating room space.
The utility model discloses a clearance adjustable knee joint replacement art knee joint pressure measuring device, when accomplishing the shin bone near-end osteotomy in the total knee joint replacement art, handle the frock with shin bone fossil fragments and install on the shin bone osteotomy face, insert the pressure measurement device afterwards and handle the frock, the thickness of the steerable pressure measurement device in position of ejector pad in the artificial adjustment pressure measurement device, and then detect thighbone inboard and outside condyle pressure under the corresponding thickness, can be according to the balanced and shin bone gasket selection of optimizing total knee joint replacement art of inside and outside condyle pressure adjustment soft tissue.
To sum up, the utility model discloses a clearance adjustable total knee joint replacement art knee joint pressure measurement device, through the thickness of the steerable pressure measuring device in position of the interior ejector pad of adjustment pressure measuring device, and then detect thighbone inboard and outside condyle pressure under the corresponding thickness, can select according to the balanced tibial pad that optimizes total knee joint replacement art of inside and outside condyle pressure adjustment soft tissue.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. A gap-adjustable knee joint pressure measuring device for total knee joint replacement is characterized by comprising a tibia keel processing tool and a pressure measuring device, wherein the pressure measuring device comprises a push block, a femur test pad and a tibia test pad; wherein:
the shape of the tibia keel processing tool is matched with a tibia osteotomy surface, the upper surface of the tibia keel processing tool is an installation surface, the tibia keel processing tool is provided with two positioning holes and four bone nail positioning holes, the two positioning holes are arranged in a left-right manner, the four bone nail positioning holes are symmetrically arranged on the left and right parts of the tibia keel processing tool in pairs, and each positioning hole is located between the corresponding two bone nail positioning holes;
the front part of the upper surface of the push block is obliquely arranged downwards to form a supporting inclined plane; the rear end of the push block is provided with a connecting rod, and the rear end of the connecting rod is provided with a push rod jack;
the femur test pad is provided with two guide holes which are communicated up and down, and the two guide holes are arranged left to right; the front part of the lower surface of the femur test pad is provided with a trapezoidal guide block, the rear surface of the trapezoidal guide block is a supported inclined plane, the left side surface and the right side surface of the trapezoidal guide block are guide side surfaces, and the bottom end of the trapezoidal guide block is provided with a button switch; the upper surface of the femur test pad is a femur supporting surface, and a plurality of pressure sensors are arranged on the femur supporting surface; the femur test pad is internally provided with a Bluetooth/wireless data transmitter and a first power supply battery pack connected with the Bluetooth/wireless data transmitter; the button switch is connected with the first power supply battery pack;
the tibia test pad comprises a tibia pad body, a longitudinal rod, a handle, a push rod, a digital display screen, a push block guide groove, two guide posts and two elastic positioning posts, wherein the tibia pad body, the longitudinal rod and the handle are sequentially connected from front to back, and the push block guide groove is longitudinally arranged in the middle of the upper surface of the tibia pad body; the two guide columns are respectively arranged on the upper surface of the tibia pad body and are respectively arranged on the left side and the right side of the guide groove of the push block; the two elastic positioning columns are respectively arranged on the lower surface of the tibia pad body and are located right below the two guide columns in a one-to-one correspondence manner; the lower surface of the tibia pad body is a tibia pressing surface; the digital display screen is arranged on the longitudinal rod; the push rod is arranged at the front end of the handle in a manner of moving back and forth, and is positioned above the digital display screen; the digital display screen, the thinning button, the thickening button, the linear motion device, the signal receiver, the position detection sensor and the second power supply battery pack are respectively connected with the controller, and the linear motion device is connected with the push rod; the power switch button is connected with the second power supply battery pack; the thickness value, the left side pressure and the right side pressure are displayed on the digital display screen;
the femur test pad, the push block, the tibia test pad and the tibia keel treatment tool are sequentially arranged from top to bottom; the push block is arranged in a push block guide groove of the tibia test pad in a manner of moving back and forth, the two guide columns of the tibia test pad are correspondingly inserted into the two guide holes of the femur test pad one by one, and the supporting inclined plane of the push block is abutted against the supported inclined plane of the trapezoidal guide block; the two elastic positioning columns of the tibia test pad are correspondingly inserted into the two positioning holes of the tibia keel processing tool one by one, and each elastic positioning column is in interference fit with the corresponding positioning hole.
2. The knee joint pressure measuring device for the total knee joint replacement with the adjustable gap as claimed in claim 1, wherein the left side and the right side of the push block are push block side guide surfaces, and the bottom of the push block is a push block bottom guide surface; the push rod jack comprises a guide hole, a first step hole, a yielding hole and a second step hole which are sequentially connected from back to front, an elastic notch is longitudinally formed in the push rod jack, and the elastic notch divides the push rod jack into an upper part and a lower part.
3. The knee joint pressure measuring device for the total knee joint replacement surgery with the adjustable gap as claimed in claim 2, wherein the front end of the push rod comprises a positioning end face, a guide inclined face, a first step face, a abdicating cylinder and a second step face which are sequentially connected from front to back, the front end of the push rod is inserted into the push rod jack, the second step hole is in contact with the first step face to form a first limit step, and the first step hole is in contact with the second step face to form a second limit step.
4. The knee joint pressure measuring device for gap-adjustable total knee replacement according to claim 2, wherein the two side walls of the push block guide groove are push block guide groove guide side surfaces, the groove bottom of the push block guide groove is a push block guide groove guide bottom surface, the push block moves back and forth along the push block guide groove, the push block side guide surfaces are attached to the corresponding push block guide groove guide side surfaces, and the push block bottom guide surfaces are attached to the push block guide groove guide bottom surface.
5. The knee joint pressure measuring device for total knee joint replacement with adjustable gap according to claim 1, wherein each elastic positioning column is vertically provided with a positioning column notch.
6. The knee joint pressure measuring device for the total knee arthroplasty with the adjustable gap as claimed in claim 1, wherein the pressure sensor collects pressure data of the left side and the right side of a femoral test pad, and transmits the collected pressure data to the signal receiver through a Bluetooth/wireless data transmitter;
the signal receiver transmits the received pressure data to the controller, the controller processes the received pressure data and outputs the processed pressure data to the digital display screen, left side pressure and right side pressure are displayed on the digital display screen, and the left side pressure data and the right side pressure data displayed on the digital display screen are pressure mean values of the left side and the right side of the femoral trial mat respectively;
the thickening button is used for sending a forward movement signal to the controller, and the thinning button is used for sending a backward movement signal to the controller; the controller controls the linear motion device to make corresponding linear motion according to the received forward motion signal or the backward motion signal, and further controls a push rod connected with the linear motion device to make forward and backward motion; the front end of the push rod is inserted into the push rod jack and then drives the push block to move back and forth along the push block guide groove; the supporting inclined plane of the pushing block is attached to the supported inclined plane of the trapezoidal guide block to move back and forth, so that the femur test pad is driven to move up and down along the guide column, the height distance between the femur test pad and the tibia pad body is adjusted, and the thickness value of the pressure measuring device is adjusted;
the position detection sensor detects the back-and-forth movement distance of the linear mover and transmits the back-and-forth movement distance data to the controller; and the controller converts the forward and backward movement distance data into a thickness dimension and outputs the thickness dimension to the digital display screen for display, and a thickness value is displayed on the digital display screen, wherein the thickness value is the thickness value of the pressure measuring device.
7. The knee joint pressure measuring device for gap-adjustable total knee replacement according to claim 6, wherein the thickness value of the pressure measuring device is default to 10mm, is increased by 2mm when the thickening button is pressed once, is decreased by 2mm when the thinning button is pressed once, and has the thickness value specification of 10mm, 12mm, 14mm, 16mm, 18mm and 20 mm.
8. The knee joint pressure measuring device for total knee arthroplasty with adjustable gap according to claim 1, wherein the first power supply battery pack and the second power supply battery pack are wireless rechargeable battery packs.
9. The knee joint pressure measuring device for total knee joint replacement with adjustable gap according to claim 1, wherein the first power supply battery pack supplies power to the bluetooth/wireless data transmitter, and the second power supply battery pack supplies power to the digital display screen, the linear motion device, the signal receiver, the position detection sensor and the controller.
10. The knee joint pressure measuring device for the total knee joint replacement with the adjustable gap according to claim 1, wherein a supporting inclined plane of the push block is attached to a supported inclined plane of the trapezoidal guide block to form a thrust inclined plane, and a mounting surface of the tibial keel processing tool is attached to a tibial pressing surface of the tibial pad body to form a positioning end surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921817545.6U CN211187302U (en) | 2019-10-28 | 2019-10-28 | Gap-adjustable knee joint pressure measuring device for total knee joint replacement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921817545.6U CN211187302U (en) | 2019-10-28 | 2019-10-28 | Gap-adjustable knee joint pressure measuring device for total knee joint replacement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110638476A (en) * | 2019-10-28 | 2020-01-03 | 上海交通大学医学院附属第九人民医院 | Gap-adjustable knee joint pressure measuring device for total knee joint replacement |
| CN111904796A (en) * | 2020-08-31 | 2020-11-10 | 中国人民解放军空军军医大学 | Knee joint training device |
-
2019
- 2019-10-28 CN CN201921817545.6U patent/CN211187302U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110638476A (en) * | 2019-10-28 | 2020-01-03 | 上海交通大学医学院附属第九人民医院 | Gap-adjustable knee joint pressure measuring device for total knee joint replacement |
| CN110638476B (en) * | 2019-10-28 | 2024-07-16 | 苏州微创畅行机器人有限公司 | Gap-adjustable knee joint pressure measuring device for total knee arthroplasty |
| CN111904796A (en) * | 2020-08-31 | 2020-11-10 | 中国人民解放军空军军医大学 | Knee joint training device |
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