CN101884542B - Total knee replacement pressure balance measuring system - Google Patents
Total knee replacement pressure balance measuring system Download PDFInfo
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- CN101884542B CN101884542B CN 201010034328 CN201010034328A CN101884542B CN 101884542 B CN101884542 B CN 101884542B CN 201010034328 CN201010034328 CN 201010034328 CN 201010034328 A CN201010034328 A CN 201010034328A CN 101884542 B CN101884542 B CN 101884542B
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Abstract
The invention relates to a total knee replacement pressure balance measuring system, which comprises a pressure acquiring device and a signal receiving and displaying device. The shape and dimension of the pressure acquiring device are the same as those of a tibia gasket in artificial knee prosthesis, and the pressure acquiring device is arranged at the knee joint of a patient during the operation so as to acquire a pressure signal and transmit the pressure signal to the signal receiving and displaying device. The signal receiving and displaying device performs force processing on the received pressure signal and displays the pressure distribution condition in a form of a three-dimensional pressure diagram so as to provide the stress condition at the tibia gasket of the artificial knee joint for a doctor in real time. The pressure acquiring device is arranged at the knee joint of the patient during the operation so as to acquire the pressure signal and is taken out after the pressure is balanced, and a proper tibia gasket is put at the knee joint of the patient. The total knee replacement pressure balance measuring system can be widely applied to the total knee replacement.
Description
Technical field
The present invention relates to pressure balance measuring system, relate in particular to the pressure balance measuring system in artificial knee replacement surgery's process.
Background technology
Along with population aging day by day, patient's quantity of suffering from knee joint osseous arthritis is rise trend, and the artificial knee replacement surgery that hospital carries out every year is also more and more.The artificial knee replacement surgery has removed patient's misery for the patient has solved the aging or problems such as necrosis and afunction of knee joint, has improved patient's quality of life greatly.
Yet, owing to bear motion stress for a long time, be easy to occur the wearing and tearing of tibial prosthesis pad, problems such as bone dissolving behind the artificial knee joint implant into body.Successful artificial knee replacement surgery can provide for the patient who has carried out artificial knee joint replacement 10 years to 20 years even service for more time; Unsuccessful artificial knee replacement surgery is then normally owing to the prosthetic knee implant pressure imbalance causes some contact surface stressed excessive, thereby wearing and tearing and the damage of artificial knee joint have been accelerated, the patient is compelled to do to perform the operation for the second time, this not only brings physiology and psychology for the patient misery has also increased the financial burden of patient and society.Therefore allow the doctor in operation process, the balance of artificial knee joint stress be accomplished to know what's what, namely guarantee stressed reasonability behind the accuracy of artificial knee joint position in operation process and the implant into body thereof, can improve artificial knee replacement surgery's success rate again, guarantee that be problem demanding prompt solution the service life of implantation joint.
This shows, in artificial knee joint implant surgery process, guarantee that the stress equalization of the artificial knee joint implanted is most important.Yet, at present in operation process, the doctor judges the pressure balanced method of prosthetic knee implant only by rule of thumb, and this not only defines the quantity of implementing artificial knee joint implant surgery doctor, has also brought certain risk and unstable factor for the artificial knee replacement surgery simultaneously.
Summary of the invention
The invention provides a kind of total knee replacement pressure balance measuring system that can overcome the above problems.
In first aspect, the invention provides a kind of total knee replacement pressure balance measuring system, this pressure balance measuring system comprises pressure deriving means and signal receiving and displaying device.This pressure deriving means is used for being placed on patient's knee joint at doctor's operation process to be sentenced and obtains pressure signal, and this pressure signal is sent in the described signal receiving and displaying device.This signal receiving and displaying device receives described pressure signal and the pressure distribution situation is shown, in order to the stressing conditions at patient's artificial knee joint tibial insert place is provided for the doctor in real time.Wherein, this pressure deriving means is the interim tibial insert that substitutes in doctor's operation process, after pressure balance again with its taking-up and put into suitable tibial insert.And this pressure deriving means comprises plane of constraint, lower support plane, sensor array, circuit board and sealing shell.Upward plane of constraint, lower support plane, sensor array, circuit board are positioned at this sealing enclosure.This sensor array is positioned on the circuit board, circuit board in the middle of per three sensors (or three with upper sensor) has the cavity, should go up plane of constraint, lower support plane and combine closely by this cavity and described three sensors around this cavity (or three with upper sensor), and to be somebody's turn to do upward the combination of plane of constraint and lower support plane be that elasticity is non-is fastenedly connected.Wherein, this sealing shell is the macromolecule material film of the acid-fast alkali-proof of bio-compatible, and plane of constraint, lower support plane are the rustless steel quality on this.
The pressure condition of total knee replacement pressure balance measuring system of the present invention by measuring in real time the prosthetic knee implant joint space be the pressure condition of tibial prosthesis pad just, and this pressure condition is sent to display device to demonstrate pressure size and distribution situation, thereby make the doctor in the replacement knee in arthroplasty process, accomplish to know what's what to the artificial knee joint equilibrium of forces, guaranteed the accuracy of artificial knee joint placement location in operation process, improved the reasonability of artificial knee joint suffered stress distribution in human body, avoid occurring the stress concentration phenomenon, prolong artificial kneed service life, improve artificial knee replacement surgery's success rate greatly.
Description of drawings
Below with reference to accompanying drawings specific embodiments of the present invention is described in detail, in the accompanying drawings:
Fig. 1 manually implants pseudarthrosis model sketch map;
Fig. 2 is total knee replacement pressure balance measuring system sketch map of the present invention;
Fig. 3 is the total knee replacement pressure deriving means circuit structure diagram of one embodiment of the invention;
Fig. 4 is the total knee replacement pressure deriving means mechanical construction drawing of one embodiment of the invention.
The specific embodiment
Fig. 1 manually implants pseudarthrosis model sketch map.As shown in Figure 1, the doctor implants artificial knee joint wherein by the joint broken parts between patient's femur and the tibia being removed, being replaced, and then finishes the displacement of artificial knee joint.
Fig. 2 is total knee replacement pressure balance measuring system sketch map of the present invention.This pressure balance measuring system comprises pressure deriving means and signal receiving and displaying device.In operation process, the doctor puts between patient's femoral prosthesis and the tibial prosthesis this pressure deriving means to obtain pressure signal, and by wireless mode this pressure signal is sent to the signal receiving and displaying device, thereby provide pressure distribution situation and force value for the doctor in real time.
In another embodiment of the present invention, described pressure signal transmitting-receiving mode is wired transmitting-receiving mode.Preferably, this artificial knee joint pressure deriving means is a handheld device.
Need to prove that artificial knee joint pressure deriving means of the present invention is to put into patient's knee joint place in operation process, substitute tibial insert temporarily, the doctor takes out and puts into suitable tibial prosthesis pad with this pressure deriving means again after pressure balance.
Fig. 3 is the total knee replacement pressure deriving means circuit structure diagram of one embodiment of the invention.This pressure balance measuring circuit comprises pressure deriving means 310 and signal receiving and displaying device 320.This pressure deriving means 310 comprises sensor array 311, signal processor 312, first microprocessor 313 and first radio receiving transmitting module 314.This signal receiving and displaying device 320 comprises second radio receiving transmitting module 321, second microprocessor 322 and display 323.
Sensor array 311 is made of a plurality of sensors, is used for obtaining its ambient pressure signal.In one embodiment of the invention, each sensor in the sensor array is distributed on the pressure spot that the doctor pays close attention to.In another embodiment of invention, the sensor in the sensor array almost is covered with the entire circuit plate beyond these pressure deriving means 310 dividing circuit elements and the line thereof.
Signal processor 312 comprises signal amplifier and analog-digital converter, and its function is to amplifying from the simulated pressure signal of sensor array 311 and do mould/number conversion, thereby obtains digital pressure signal.
First microprocessor 313 is responsible for each device operate as normal of control system, and digital pressure signal is handled.In one embodiment of the invention, these first microprocessor 313 employing window treatments modes are obtained the useful data in this digital pressure signal.
First microprocessor 313 will this useful digital pressure signal be encoded and is handled, and the digital pressure signal after first radio receiving transmitting module 314 will be handled is launched with wireless mode.
Second radio receiving transmitting module 321 in the signal receiving and displaying device 320 receives the useful digital pressure signal from pressure deriving means 310 under 322 controls of second microprocessor, and it is handled, to obtain current pressure information.
Second microprocessor 322 adopts cubic spline difference algorithm that its pressure information that receives is carried out the processing of power.In another embodiment of the present invention, the processing mode of this power is by independently software or hardware are realized.
The information of the power after the display 323 in the signal receiving and displaying device 320 will be handled by second microprocessor 322 shows with the form of three-dimensional pressure figure, so that the doctor can check the distribution situation of power and the value of power in real time intuitively in operation process, and then provide patient's knee joint stressing conditions for the doctor.
Fig. 4 is the total knee replacement pressure deriving means mechanical construction drawing of one embodiment of the invention.This pressure obtains machinery and comprises upper film 411, following thin film 412, goes up plane of constraint 421, lower support plane 422, sensor array 430, circuit board 440 and support shell 450.
Wherein, upper film 411 and following thin film 412 are the macromolecule plastic film of the acid-fast alkali-proof of bio-compatible, this supports shell 450 also is the high molecule plastic of the acid-fast alkali-proof of bio-compatible, and just this support shell 450 is bigger compared to upper film 411, following thin film 412 hardness.Upward plane of constraint 421 and lower support plane 422 are the rustless steel quality.
Among Fig. 4, upper film 411, following thin film 412 lay respectively at the both sides up and down of supporting shell 450, and support shell 450 common sealing shells that constitute these pressure deriving means with this, and circuit board 440, sensor array 430, go up plane of constraint 421, lower support plane 422 all is enclosed in this sealing enclosure.Preferably, because this pressure deriving means is used for substituting tibial insert temporarily, so the sealing shell sizes of this pressure deriving means, shape and tibial insert size, shape are identical.
The combination that should go up between plane of constraint, three sensors, circuit board, the lower support plane can make external pressure be sent on these three sensors by last plane of constraint, lower support plane losslessly.
The doctor is in carrying out artificial knee replacement surgery's process, this pressure is obtained machinery to be placed between artificial tibial prosthesis and the femoral prosthesis, by the people for moving patient's shank, make knee joint carry out flexion and extension, and in the process of bending and stretching, observe power distribution situation between artificial tibial prosthesis and the femoral prosthesis, thereby adjust artificial femoral prosthesis and tibial prosthesis in the storing position of human body, and carry out suitable soft tissue balance and loosen, make pressure distribution reach the perfect condition of balanced distribution
Obviously, under the prerequisite that does not depart from true spirit of the present invention and scope, the present invention described here can have many variations.Therefore, the change that all it will be apparent to those skilled in the art that all should be included within the scope that these claims contain.The present invention's scope required for protection is only limited by described claims.
Claims (11)
1. a total knee replacement pressure balance measuring system comprises pressure deriving means and signal receiving and displaying device;
Described pressure deriving means is used for being placed on patient's knee joint at doctor's operation process to be sentenced and obtains pressure signal, and this pressure signal is sent in the described signal receiving and displaying device;
Described signal receiving and displaying device receives described pressure signal and the pressure distribution situation is shown, in order to the stressing conditions at the tibial insert place at patient's artificial knee joint place is provided for the doctor in real time;
Wherein, described pressure deriving means is to substitute described tibial insert temporarily in doctor's operation process, after pressure balance again with its taking-up and put into suitable described tibial insert;
And described pressure deriving means comprises plane of constraint, lower support plane, sensor array, circuit board and sealing shell;
Described upward plane of constraint, lower support plane, sensor array, circuit board are positioned at described sealing enclosure;
Described sensor array is positioned on the described circuit board, described sensor array is made up of three above sensors, described three circuit boards with the upper sensor centre have the cavity, the described plane of constraint, lower support plane gone up combined closely with upper sensor with around this cavity described three by this cavity, and the combination on described last plane of constraint and lower support plane to be that elasticity is non-be fastenedly connected;
Wherein, described sealing shell is the macromolecule material film of the acid-fast alkali-proof of bio-compatible, and described upward plane of constraint, lower support plane are the rustless steel quality.
2. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, the shape of the shape of described pressure deriving means, size and described tibial insert, measure-alike.
3. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, described signal receiving and displaying device carries out the processing of power to its pressure signal that receives, and the processing method of this power adopts cubic spline difference algorithm.
4. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, described pressure distribution situation display mode is dynamic three-dimensional pressure graphic display mode and pressure value mode.
5. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, described pressure deriving means also comprises signal processing module, first microprocessor and first transceiver module;
Described sensor array is used for obtaining its ambient pressure signal;
Described signal processing module is used for obtaining digital pressure signal;
Described first microprocessor adopts the window treatments mode to obtain the useful data of described digital pressure signal, useful described digital pressure signal is encoded and handles;
Described digital pressure signal after described first transceiver module will be handled sends.
6. a kind of total knee replacement pressure balance measuring system as claimed in claim 5 is characterized in that, described sensor array is distributed on the pressure spot that the doctor pays close attention to.
7. a kind of total knee replacement pressure balance measuring system as claimed in claim 5 is characterized in that, described signal processing module is used for its simulated pressure signal that receives is carried out processing and amplifying, does analog to digital conversion again, thereby obtains digital pressure signal.
8. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, the transmitting-receiving mode of described pressure signal is the wireless receiving and dispatching mode.
9. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, described signal receiving and displaying device comprises second transceiver module, second microprocessor, display;
Described second transceiver module is used for receiving the pressure signal from described pressure deriving means, and this pressure signal is decoded, thereby obtains current pressure information;
Described second microprocessor adopts cubic spline difference algorithm described pressure information to be carried out the processing of power;
The information of the power after described display will be handled shows with the form of dynamic three-dimensional pressure figure and pressure value.
10. a kind of total knee replacement pressure balance measuring system as claimed in claim 1 is characterized in that, described sealing shell comprises upper film, following thin film and supports shell;
Described upper film, following thin film lay respectively at the both sides up and down of described support shell.
11. a kind of total knee replacement pressure balance measuring system as claimed in claim 10 is characterized in that, described support shell hardness is bigger compared to this upper film, following thin film.
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| CN 201010034328 CN101884542B (en) | 2010-01-18 | 2010-01-18 | Total knee replacement pressure balance measuring system |
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| CN 201010034328 CN101884542B (en) | 2010-01-18 | 2010-01-18 | Total knee replacement pressure balance measuring system |
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| CN101884542A CN101884542A (en) | 2010-11-17 |
| CN101884542B true CN101884542B (en) | 2013-10-02 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688097B (en) * | 2012-05-14 | 2014-11-26 | 清华大学 | Attitude acquisition method and system for acetabulum and femoral head in artificial hip joint replacement |
| CN102670219B (en) * | 2012-05-25 | 2015-06-17 | 浙江大学 | System for acquiring and restoring somatosensory pressure signal |
| CN102885626B (en) * | 2012-09-20 | 2015-01-14 | 清华大学 | Method and system for acquiring postures of acetabular bone and femoral head in novel hip arthroplasty |
| CN103083117A (en) * | 2013-01-18 | 2013-05-08 | 周一新 | Joint prosthesis navigation model testing system |
| CN104083182A (en) * | 2013-04-01 | 2014-10-08 | 德普伊新特斯产品有限责任公司 | Shaping sensor module and system for determining joint force of knee joints of patient |
| CN105847652A (en) * | 2016-05-27 | 2016-08-10 | 清华大学 | Artificial knee joint replacement direct image transmission system |
| CN107184221A (en) * | 2017-05-22 | 2017-09-22 | 北京爱康宜诚医疗器材有限公司 | Soft tissue balance device for measuring force |
| CN107693174A (en) * | 2017-09-30 | 2018-02-16 | 北京爱康宜诚医疗器材有限公司 | Tibial plateau pad die trial |
| CN107802382A (en) * | 2017-11-23 | 2018-03-16 | 吴小玲 | Knee joint balance master system and its balance method of discrimination in total knee arthroplasty |
| CN109157221A (en) * | 2018-08-08 | 2019-01-08 | 武汉拓思瑞医疗科技有限公司 | Replacement knee in arthroplasty auxiliary device |
| CN109708782B (en) * | 2018-12-14 | 2021-02-12 | 中国科学院深圳先进技术研究院 | Knee joint prosthesis gasket three-dimensional force sensor and contact stress measuring method thereof |
| CN111603254A (en) * | 2020-04-30 | 2020-09-01 | 南京理工大学 | Bone joint tension balancer based on zigbee communication protocol |
| CN113116353B (en) * | 2021-04-06 | 2022-03-22 | 骨圣元化机器人(深圳)有限公司 | Pressure measurement system and pressure measurement method for knee joint replacement surgery |
| CN113925493A (en) * | 2021-10-12 | 2022-01-14 | 北京易迈医疗科技有限公司 | Knee joint multi-parameter measuring system based on artificial total knee joint replacement |
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| CN1729483A (en) * | 2002-11-27 | 2006-02-01 | 康复米斯公司 | Patient selectable joint arthroplasty devices and surgical tools facilitating increased accuracy, speed and simplicity in performing total and partial joint arthroplasty |
| CN1810208A (en) * | 2005-01-28 | 2006-08-02 | 深圳安科高技术股份有限公司 | System and method for measuring pressure distribution and interval between two bearers |
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| US5916220A (en) * | 1998-02-02 | 1999-06-29 | Medidea, Llc | Bone cutting guide and method to accommodate different-sized implants |
| CN1729483A (en) * | 2002-11-27 | 2006-02-01 | 康复米斯公司 | Patient selectable joint arthroplasty devices and surgical tools facilitating increased accuracy, speed and simplicity in performing total and partial joint arthroplasty |
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| CN101884542A (en) | 2010-11-17 |
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Effective date of registration: 20200727 Address after: Room 205, zone 9, east main building, Tsinghua University, Haidian District, Beijing 100084 Co-patentee after: BEIJING JISHUITAN Hospital Patentee after: TSINGHUA University Address before: 100084 room 9, zone 205, east main building, Tsinghua University, Beijing Co-patentee before: Zhou Yixin Patentee before: TSINGHUA University Co-patentee before: Tang Jing |
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