CN113116353A - Pressure measurement system and pressure measurement method for knee joint replacement surgery - Google Patents
Pressure measurement system and pressure measurement method for knee joint replacement surgery Download PDFInfo
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- CN113116353A CN113116353A CN202110365979.2A CN202110365979A CN113116353A CN 113116353 A CN113116353 A CN 113116353A CN 202110365979 A CN202110365979 A CN 202110365979A CN 113116353 A CN113116353 A CN 113116353A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/22—Ergometry; Measuring muscular strength or the force of a muscular blow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
Abstract
The application is suitable for the technical field of medical instruments, and provides a pressure measurement system and a pressure measurement method for knee joint replacement surgery. The pressure measurement system comprises a first pressure sensor array, a second pressure sensor array and a pressure display, wherein the first pressure sensor array is arranged on the surface of a femoral condyle of the knee joint, the second pressure sensor array is arranged on the surface of a femoral pulley of the knee joint, and the first pressure sensor array and the second pressure sensor array are respectively connected with the pressure display; the first pressure sensor array collects knee joint gap pressure and transmits the knee joint gap pressure to the pressure display; the second pressure sensor array collects patellar pressure of the knee joint and transmits the patellar pressure to the pressure display; the pressure display displays the knee joint gap pressure and the patella pressure after receiving the knee joint gap pressure and the patella pressure. The problem that the prior art is difficult to obtain good knee joint gap balance and patella track can be solved through the knee joint tracking device.
Description
Technical Field
The application belongs to the technical field of medical instruments, and particularly relates to a pressure measurement system and a pressure measurement method for knee joint replacement surgery.
Background
With the increase of life expectancy, the aging process of the population and the increase of living pressure, the demand of orthopedic surgery, especially knee joint replacement surgery, is increasing year by year. The knee joint replacement surgery has high complexity, not only ensures accurate osteotomy in three-dimensional space and accurate matching with prosthesis, but also pays attention to soft tissue balance, so that the surgery skill and experience of doctors are extremely high.
One of the key links to the success of knee replacement surgery is to achieve good knee gap balance and patellar tracking. In the traditional knee joint replacement operation, a doctor adjusts the knee joint gap and the patella track according to own experience, so that good knee joint gap balance and patella track are difficult to obtain.
Disclosure of Invention
The embodiment of the application provides a pressure measurement system and a pressure measurement method for knee joint replacement surgery, and aims to solve the problem that in the prior art, good knee joint gap balance and patella track are difficult to obtain.
In a first aspect, the present embodiments provide a pressure measurement system for knee replacement surgery, the pressure measurement system including a first pressure sensor array disposed on a femoral condyle surface of a knee joint, a second pressure sensor array disposed on a femoral trochlear surface of the knee joint, and a pressure display, the first pressure sensor array and the second pressure sensor array being respectively connected to the pressure display;
the first pressure sensor array is used for collecting knee joint gap pressure and transmitting the knee joint gap pressure to the pressure display;
the second pressure sensor array is used for collecting patellar pressure of the knee joint and transmitting the patellar pressure to the pressure display;
the pressure display is used for displaying the knee joint gap pressure and the patellar pressure.
In a second aspect, the present application provides a pressure measurement method for knee replacement surgery, applied to a pressure measurement system, the pressure measurement system including a first pressure sensor array, a second pressure sensor array and a pressure display, the first pressure sensor array being disposed on a femoral condyle surface of a knee joint, the second pressure sensor array being disposed on a femoral trochlear surface of the knee joint, the first pressure sensor array and the second pressure sensor array being respectively connected to the pressure display, the pressure measurement method including:
the first pressure sensor array collects knee joint gap pressure and transmits the knee joint gap pressure to the pressure display;
the second pressure sensor array collects patellar pressure of the knee joint and transmits the patellar pressure to the pressure display;
the pressure display displays the knee joint gap pressure and the patellar pressure.
From top to bottom, the pressure measurement system for knee joint replacement operation that this application provided includes first pressure sensor array, second pressure sensor array and pressure display, first pressure sensor array sets up the thighbone condyle surface at the knee joint for gather knee joint clearance pressure and transmit knee joint clearance pressure to pressure display, second pressure sensor array sets up the thighbone coaster surface at the knee joint, be used for gathering the patellar pressure of knee joint and transmit patellar pressure to pressure display, pressure display can show knee joint clearance pressure and patellar pressure received. The doctor can adjust the knee joint gap balance more accurately according to the knee joint gap pressure displayed by the pressure display, thereby ensuring that the knee joint replacement surgery obtains good knee joint gap balance. The doctor can relatively accurately adjust the patella track according to the patella pressure (the patella pressure can reflect the patella track) displayed by the pressure display, so that the knee joint replacement operation is ensured to obtain a good patella track.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a pressure measurement system for knee replacement surgery according to an embodiment of the present disclosure;
FIG. 2 is a diagram of an example arrangement of an array of pressure sensors;
FIG. 3a is an exemplary illustration of a first gap filling sheet filling a knee joint gap; 3b is an exemplary view of a third gap filling sheet and a fourth gap filling sheet filling a knee joint gap;
FIG. 4 is a diagram of another example arrangement of an array of pressure sensors;
FIG. 5 is a display example diagram of a pressure display;
fig. 6 is a schematic flow chart illustrating an implementation of the pressure measurement method for knee joint replacement surgery according to the second embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that in the description of the present application and the appended claims, the terms "first," "second," "third," "fourth," and the like are used for distinguishing between descriptions and not for indicating or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Referring to fig. 1, which is a schematic structural diagram of a pressure measurement system for knee replacement surgery provided in an embodiment of the present application, for convenience of description, only the portions related to the embodiment of the present application are shown.
The pressure measurement system comprises a first pressure sensor array 11, a second pressure sensor array 12 and a pressure display 13, wherein the first pressure sensor array 11 and the second pressure sensor array 12 are respectively connected with the pressure display 13.
The first pressure sensor array 11 may be connected to the pressure display 13 in a wireless communication manner or a wired communication manner, and after the connection is established, data transmission may be performed between the first pressure sensor array 11 and the pressure display 13. The second pressure sensor array 12 may be connected to the pressure display 13 in a wireless communication manner or a wired communication manner, and after the connection is established, data transmission may be performed between the second pressure sensor array 12 and the pressure display 13. The wireless communication method includes, but is not limited to, wireless fidelity (WiFi), bluetooth, third generation mobile communication technology, fourth generation mobile communication technology, fifth generation mobile communication technology, and the like. The wired communication means includes, but is not limited to, a wire, an audio line, a universal serial bus, and the like.
The first pressure sensor array 11 is disposed on the femoral condyle surface of the knee joint for collecting the knee joint gap pressure and transmitting the knee joint gap pressure to the pressure display 13.
The second pressure sensor array 12 is disposed on a femoral trochlear surface of the knee joint for acquiring patellar pressure of the knee joint and transmitting the patellar pressure to the pressure display 13.
And the pressure display 13 is used for displaying the knee joint gap pressure and the patellar pressure.
Fig. 2 shows an example of the arrangement of the pressure sensor array. The gap pressure measurement area in fig. 2 is the area where the first pressure sensor array 11 is located, i.e., the femoral condyle surface. The patellar pressure measurement region in fig. 2 is the region where the second pressure sensor array 12 is located, i.e. the femoral trochlear surface.
In an embodiment, the first pressure sensor array 11 may transmit the collected knee joint gap pressure to the pressure display 13 when receiving the first pressure transmission instruction sent by the pressure display 13, or may automatically transmit the collected knee joint gap pressure to the pressure display 13 after collecting the knee joint gap pressure, which is not limited herein. The first pressure transmission command is used for instructing the first pressure sensor array 11 to transmit the knee joint gap pressure to the pressure display 13.
In an embodiment, the second pressure sensor array 12 may transmit the collected patella pressure to the pressure display 13 upon receiving the second pressure transmission instruction sent by the pressure display 13, or may automatically transmit the collected patella pressure to the pressure display 13 after collecting the patella pressure, which is not limited herein. The second pressure transmission command is used to instruct the second pressure sensor array 12 to transmit the patella pressure to the pressure display 13.
In an embodiment, the pressure display 13 may display the pressure when receiving the pressure transmitted by any one of the pressure sensor arrays (i.e., any one of the first pressure sensor array 11 and the second pressure sensor array 12), i.e., the knee joint gap pressure and the patellar pressure may not be displayed simultaneously on the pressure display 13. The pressure display 13 may also display the knee joint gap pressure and the patella pressure simultaneously after receiving the knee joint gap pressure transmitted by the first pressure sensor array 11 and the patella pressure transmitted by the second pressure sensor array 12.
The knee joint gap refers to the gap between the femoral condyle and the tibial plateau of the knee joint. The knee joint gap can be divided according to the knee joint angle. For example, when the knee angle is 90 °, the knee joint gap may be referred to as the flexion gap; at a knee angle of 180, the knee gap may be referred to as a straightened gap. When the patient's leg is in flexion, the knee angle is 90 °. When the leg of the patient is in the straightened position, the knee joint angle is 180 degrees. Flexion gap refers to the gap between the posterior femoral condyle of the knee joint and the tibial plateau, i.e., when the patient's leg is in flexion, the femoral condyle may be referred to as the posterior femoral condyle. The extension gap is the gap between the distal femur of the knee joint and the tibial plateau, i.e., when the patient's leg is in an extended position, the femoral condyle may be referred to as the distal femur.
The knee joint gap includes a knee joint medial gap and a knee joint lateral gap. The medial knee gap is the gap between the medial femoral condyle and the tibial plateau. The lateral knee joint gap is the gap between the lateral femoral condyle and the tibial plateau.
Since the knee joint gap includes a knee joint medial gap and a knee joint lateral gap, the knee joint gap pressure may include a knee joint medial gap pressure and a knee joint lateral gap pressure. The knee medial gap pressure may refer to the pressure between the medial femoral condyle and the tibial plateau. The knee lateral gap pressure may refer to the pressure between the lateral femoral condyle and the tibial plateau.
Patellar pressure includes both medial and lateral patellar pressure. The medial patellar pressure may refer to the pressure between the medial patella and the femoral trochlear. Lateral patellar pressure may refer to the pressure between the lateral side of the patella and the femoral trochlear.
The first pressure sensor array 11 includes at least two pressure sensors, and is capable of acquiring a knee joint medial gap pressure and a knee joint lateral gap pressure, respectively. For example, the first pressure sensor array 11 includes two pressure sensors, which may be referred to as a pressure sensor 1 and a pressure sensor 2, respectively, where the pressure sensor 1 is used for acquiring the inner gap pressure of the knee joint, and the pressure sensor 2 is used for acquiring the outer gap pressure of the knee joint.
The second pressure sensor array 12 includes at least two pressure sensors, which can respectively collect the medial patellar pressure and the lateral patellar pressure. For example, the second pressure sensor array 12 includes two pressure sensors, which may be referred to as a pressure sensor 3 and a pressure sensor 4, respectively, the pressure sensor 3 is used for acquiring the medial patella pressure, and the pressure sensor 4 is used for acquiring the lateral patella pressure.
According to the processing conditions of the knee joint replacement operation on the tibial plateau and the femur, the knee joint replacement operation can be divided into three stages, namely a stage in which the tibial plateau and the femur are not resected, a stage in which the tibial plateau is resected and the femur is not resected, and a stage in which the tibial plateau and the femur are resected. According to the knee joint pressure measuring device and the knee joint pressure measuring method, the knee joint gap pressure and the patella pressure of the three stages can be measured, and the respective knee joint gap pressure and the patella pressure of the three stages are obtained.
In the non-osteotomy stage of both the tibial plateau and the femur, the surgeon may follow a conventional approach to make the incision reveal. After the joint cavity is exposed, the knee joint may be placed in a flexion position, at which time the first pressure sensor array 11 may be disposed on the surface of the femoral condyle, and then the knee joint may be placed in an extension position, so that the first pressure sensor array 11 is inserted into the knee joint gap to acquire the gap pressure (i.e., the knee joint gap pressure) when the knee joint performs the target motion. The target motion includes, but is not limited to, the valgus and varus motion of the knee joint, the flexion and extension motion of the knee joint, and the like.
At the stage that neither the tibial plateau nor the femur has been resected and the stage that the tibial plateau has been resected and the femur has not been resected, because the clearance between femoral condyle and the tibial plateau is great, influence first pressure sensor array 11 and gather knee joint clearance pressure, so in order to make first pressure sensor array 11 gather knee joint clearance pressure more accurately, can fill the knee joint clearance through the clearance packing piece for first pressure sensor array 11 more closely laminates femoral condyle surface. Alternatively, the gap filling sheet may be printed out by a 3D printing technique.
In one embodiment, the gap filling sheet includes a gap shape of the entire course of the target motion in order to adapt the gap of the knee joint to the entire course of the target motion.
It should be noted that, since the gap filling sheet is used for filling the knee joint gap, which is the gap between the femoral condyle and the tibial plateau, the upper surface form of the gap filling sheet matches with the surface form of the femoral condyle, and the lower surface form of the gap filling sheet matches with the form of the tibial plateau, so as to ensure that the gap filling sheet can better fill the knee joint gap.
Since the morphology of the tibial plateau before osteotomy is different from the morphology of the tibial plateau after osteotomy, the lower surface morphology of the gap filler used in the stage where neither the tibial plateau nor the femur is osteotomy is different from the lower surface morphology of the gap filler used in the stage where the tibial plateau is osteotomy and the femur is not osteotomy. In order to distinguish the gap filler used in the above two stages, the gap filler used in the stage in which neither the tibial plateau nor the femur has been resected may be referred to as a first gap filler, and the gap filler used in the stage in which the tibial plateau has been resected and the femur has not been resected may be referred to as a second gap filler. An exemplary illustration of a first gap filler piece for filling a knee joint gap is shown in fig. 3a, the first gap filler piece of fig. 3a being used to fill a knee joint gap at a stage where neither the tibial plateau nor the femur has been osteotomy.
Different knee joint replacement operations, it is probably different to the thickness that the tibial plateau cut the bone, and the knee joint clearance is also different so, so at the tibial plateau cut bone and thighbone not cut the bone stage, can use the clearance filling piece of two at least different grade types to fill the knee joint clearance to make the clearance filling piece be suitable for different knee joint clearances.
For example, in the osteotomy stage of the tibial plateau and the non-osteotomy stage of the femur, the knee joint gap is filled with two different types of gap filling sheets, which may be respectively referred to as a third gap filling sheet and a fourth gap filling sheet (i.e., the second gap filling sheet includes the third gap filling sheet and the fourth gap filling sheet), the upper surface morphology of the third gap filling sheet matches with the morphology of the condyle surface of the femur, the lower surface morphology of the third gap filling sheet matches with the upper surface morphology of the fourth gap filling sheet, and the lower surface morphology of the fourth gap filling sheet matches with the morphology of the tibial plateau after the osteotomy. The third gap filler piece in combination with at least one fourth gap filler piece may fill different knee joint gaps. The lower surface of the third gap filling sheet and the upper surface of the fourth gap filling sheet may be flat.
Shown in fig. 3b is an exemplary view of a third and fourth gap-filling piece for filling a knee joint gap, the third and fourth gap-filling pieces in fig. 3b being used to fill a knee joint gap at a stage where the tibial plateau has been resected and the femur has not been resected.
In one embodiment, the gap filling sheet may be determined from a three-dimensional model of the knee joint. The method specifically comprises the following steps: acquiring a three-dimensional model of a knee joint; determining a three-dimensional model of a femoral condyle, a three-dimensional model of a tibial plateau and a three-dimensional model of a femoral pulley according to the three-dimensional model of the knee joint; and determining the gap filling sheet according to the three-dimensional model of the femoral condyle, the three-dimensional model of the tibial plateau and the three-dimensional model of the femoral pulley.
The three-dimensional model of the femur can be determined according to the three-dimensional model of the femoral condyle and the three-dimensional model of the femoral trochanter, and the upper surface form of the gap filling sheet can be determined according to the three-dimensional model of the femur because the upper surface of the gap filling sheet is in contact with the femur. Because the lower surface of the gap filler sheet is in contact with the tibial plateau, the lower surface morphology of the gap filler sheet can be determined from the three-dimensional model of the tibia.
The three-dimensional model of the knee joint may be obtained from other devices, or may be obtained by the terminal device according to an electronic computed tomography image of the knee joint, which is not limited herein.
Specifically, the terminal device may send a model acquisition instruction to the other device, and the other device, after receiving the acquisition instruction, sends the three-dimensional model of the knee joint stored in the other device to the terminal device. And the acquisition instruction instructs other equipment to send the three-dimensional model of the knee joint to the terminal equipment.
The terminal device can acquire an electronic computer tomography image of the knee joint and reconstruct a three-dimensional model of the knee joint according to the electronic computer tomography image.
The electronic computed tomography image may be acquired by the terminal device from another device, or may be acquired from a memory of the terminal device, which is not limited herein.
In the stage that the tibial plateau and the femur are osteotomy, a doctor can install a femoral prosthesis test model and a tibial prosthesis test model for a patient, in the installation process, the first pressure sensor array 11 can be arranged on the surface of the femoral condyle of the femoral prosthesis test model to collect knee joint gap pressure in the process that the knee joint carries out the inner and outer tilting movement or the flexion and extension movement, and the second pressure sensor array 12 is arranged on the surface of the femoral pulley of the femoral prosthesis test model to collect patellar pressure in the process that the knee joint carries out the target movement.
The femoral prosthesis trial is used for selecting a matched femoral prosthesis for a patient. The tibial prosthesis trial model is used for selecting a matched tibial prosthesis for a patient.
Fig. 4 is another example of the arrangement of the pressure sensor array. The grid in fig. 4 is a dispersed array of pressure sensors for measuring pressure in the stressed location (i.e., the medial-lateral gap of the knee joint and the medial-lateral side of the patella) while supporting multiple readings. The anchor point in fig. 4 is used to fix the pressure sensor array on the femoral prosthesis test model, and specifically, the pressure sensor array may be fixed on the femoral condyle surface and the femoral trochlear surface of the femoral prosthesis test model. The transmission interface in fig. 4 is used to implement data transmission between the pressure sensor array and the pressure display 13, for example, the pressure collected by the pressure sensor array is transmitted to the pressure display 13 through the transmission interface.
In an embodiment, the first pressure sensor array 11 and the second pressure sensor array 12 may be capacitive pressure sensors. Due to the small thickness of the capacitive pressure sensors (typically 0.1 mm), the first pressure sensor array 11 and the second pressure sensor array 12 in the present application can be applied to any brand of femoral prosthesis test model.
In an embodiment, the pressure display may further be configured to:
acquiring a change curve of knee joint gap pressure in the process of performing target motion on the knee joint, and displaying the change curve of the knee joint gap pressure;
and acquiring a change curve of the patella pressure in the process of target movement of the knee joint, and displaying the change curve of the patella pressure.
In the process of performing the target movement of the knee joint, the first pressure sensor array 11 may collect the knee joint gap pressure at intervals of a first preset time, and transmit the knee joint gap pressure to the pressure display 13, the pressure display 13 may obtain all the knee joint gap pressures in the process of the target movement, and the change curve of the knee joint gap pressure may be determined according to all the knee joint gap pressures. Alternatively, the pressure display 13 may obtain all of the knee joint gap pressures, and then transmit all of the knee joint gap pressures to another device, and the other device may determine a change curve of the knee joint gap pressure according to all of the knee joint gap pressures, and transmit the change curve of the knee joint gap pressure to the pressure display 13.
During the target movement of the knee joint, the second pressure sensor array 12 may collect the patella pressure at intervals of a second preset time and transmit the patella pressure to the pressure display 13, and the pressure display 13 may obtain all the patella pressures during the target movement, and according to all the patella pressures, a variation curve of the patella pressure may be determined. Alternatively, the pressure display may also send all the patellar pressures to other devices after obtaining all the patellar pressures, and the other devices determine the variation curve of the patellar pressures according to all the patellar pressures and send the variation curve of the patellar pressures to the pressure display 13.
The first preset time and the second preset time may be the same or different, and are not limited herein.
In one embodiment, the pressure display 13 is further configured to:
displaying a gap mode option and a patellar mode option;
when the selection operation of the gap mode option is detected, acquiring a change curve of the knee joint gap pressure, and displaying the change curve of the knee joint gap pressure;
when the selection operation of the patellar mode option is detected, acquiring a change curve of the patellar pressure, and displaying the change curve of the patellar pressure.
The gap mode option is used for indicating the pressure display 13 to display the change curve of the knee joint gap pressure. The patellar mode option is used to instruct the pressure display 13 to display the curve of the patellar pressure.
In the non-osteotomy stage of the tibial plateau and the femur, the change curve of the knee joint gap pressure and/or the knee joint gap pressure is displayed on the pressure display 13, so that the preoperative knee joint gap balance can be evaluated, a doctor is assisted to accurately adjust the knee joint gap balance, and the operation scheme is perfected.
In the stage that the tibial plateau is cut and the femur is not cut and the stage that both the tibial plateau and the femur are cut, the variation curve of the knee joint gap pressure and/or the knee joint gap pressure is displayed on the pressure display 13, so that the knee joint gap balance in the operation can be evaluated, and a doctor is assisted to accurately adjust the knee joint gap balance.
At the stage that neither the tibial plateau nor the femur is osteotomy, the pressure display 13 displays the patella pressure and the change curve of the patella pressure, so that a doctor can be assisted in accurately adjusting the patella track and evaluating the recovery condition of the postoperative patella track.
In the stage that the tibial plateau is osteotomy and the femoral is not osteotomy and the stage that both the tibial plateau and the femoral are osteotomy, the pressure display 13 displays the patella pressure and the change curve of the patella pressure, so that the patella track in the operation can be evaluated, and a doctor is assisted to accurately adjust the patella track.
The selection operation may be any one of a plurality of operations such as single click, double click, slide, click, and the like, and is not limited herein. For example, the pressure display 13 may determine a change curve of the knee joint gap pressure and display the change curve of the knee joint gap pressure when a click operation on the gap mode option is detected.
The change curve of the knee joint gap pressure and the change curve of the patella pressure may be displayed on the pressure display 13 at the same time, or may display one of the two transformation curves, which is not limited herein.
As shown in fig. 5, which is a display example of a pressure display, the unit of pressure in fig. 5 may be mpa. The pressure display 13 in fig. 5 may display the medial knee joint gap pressure, the lateral knee joint gap pressure, the medial patellar pressure, the lateral patellar pressure, the profile of the lateral pressure, the profile of the medial pressure, the gap mode option, and the patellar mode option. The abscissa of the change curve of the lateral pressure and the change curve of the medial pressure is the knee joint angle, and the ordinate is the pressure. The transmission interface in fig. 5 is used to realize data transmission between the pressure sensor array and the pressure display 13, for example, to receive the pressure transmitted by the pressure sensor array through the transmission interface.
When the gap pattern in fig. 5 is selected, it is determined that the change curve of the lateral pressure in fig. 5 is a change curve of the lateral gap pressure of the knee joint, and the change curve of the medial pressure in fig. 5 is a change curve of the medial gap pressure of the knee joint. When the patella mode in fig. 5 is selected, the change curve of the lateral pressure in fig. 5 can be determined as the change curve of the lateral pressure of the patella, and the change curve of the medial pressure in fig. 5 as the change curve of the medial pressure of the patella.
In an embodiment, the pressure measurement system may further include a mylar for wrapping the first pressure sensor array 11 and/or the second pressure sensor array 12. The polyester film can change the shape of the polyester film according to the shape of the femoral condyle and wrap the pressure sensor array. The first pressure sensor array 11 is wrapped by a polyester film and then arranged on the surface of the femoral condyle, so that the first pressure sensor array 11 can be protected in a sealing way, and the first pressure sensor array 11 can be better attached to the surface of the femoral condyle. The second pressure sensor array 12 is wrapped by the polyester film and then arranged on the surface of the femoral trochlear, so that the second pressure sensor array 12 can be protected in a sealing manner, and the second pressure sensor array 12 can be better attached to the surface of the femoral trochlear.
The pressure measurement system for knee replacement surgery that this application embodiment provided includes first pressure sensor array 11, second pressure sensor array 12 and pressure display 13, first pressure sensor array 11 sets up the thighbone condyle surface at the knee joint for gather knee joint clearance pressure and transmit knee joint clearance pressure to pressure display 13, second pressure sensor array 12 sets up the thighbone pulley surface at the knee joint for gather the patella pressure of knee joint and transmit patella pressure to pressure display 13, pressure display 13 can show knee joint clearance pressure and patella pressure received. The doctor can adjust the knee joint gap balance more accurately according to the knee joint gap pressure displayed by the pressure display 13, thereby ensuring that the knee joint replacement surgery obtains good knee joint gap balance. The doctor can relatively accurately adjust the patella track according to the patella pressure displayed by the pressure display 13, so that the knee joint replacement surgery can be ensured to obtain a good patella track.
Referring to fig. 6, a schematic flow chart of a pressure measurement method for a knee replacement surgery provided in the second embodiment of the present application is shown, the pressure measurement method is applied to a pressure measurement system in the first embodiment of the present application, the pressure measurement system includes a first pressure sensor array, a second pressure sensor array and a pressure display, the first pressure sensor array is disposed on a femoral condyle surface of the knee joint, the second pressure sensor array is disposed on a femoral trochlear surface of the knee joint, and the first pressure sensor array and the second pressure sensor array are respectively connected to the pressure display. As shown in fig. 6, the pressure measurement method may include the steps of:
In step 602, the second pressure sensor array collects patellar pressure of the knee joint and transmits the patellar pressure to the pressure display.
In one embodiment, when the knee replacement surgery is in a stage where neither the tibial plateau nor the femur is osteotomy, or the tibial plateau is osteotomy and the femur is not osteotomy, the pressure measurement system further comprises a gap filling sheet;
the gap filling sheet fills the knee joint gap.
In an embodiment, the pressure measurement system further comprises a terminal device;
the method comprises the steps that terminal equipment obtains a three-dimensional model of a knee joint; determining a three-dimensional model of a femoral condyle, a three-dimensional model of a tibial plateau and a three-dimensional model of a femoral pulley according to the three-dimensional model of the knee joint; and determining the gap filling sheet according to the three-dimensional model of the femoral condyle, the three-dimensional model of the tibial plateau and the three-dimensional model of the femoral pulley.
In an embodiment, the terminal device acquires an electron computed tomography image of the knee joint and reconstructs a three-dimensional model of the knee joint from the electron computed tomography image.
In one embodiment, the pressure display acquires a change curve of the knee joint gap pressure in the process of performing target motion on the knee joint and displays the change curve of the knee joint gap pressure; and acquiring a change curve of the patella pressure in the process of target movement of the knee joint, and displaying the change curve of the patella pressure.
In one embodiment, the pressure display displays a gap mode option and a patellar mode option; when the selection operation of the gap mode option is detected, acquiring a change curve of the knee joint gap pressure, and displaying the change curve of the knee joint gap pressure; when the selection operation of the patellar mode option is detected, acquiring a change curve of the patellar pressure, and displaying the change curve of the patellar pressure.
In one embodiment, the pressure measurement system further comprises a mylar that wraps around the first pressure sensor array and/or the second pressure sensor array.
In one embodiment, the femoral condyle surface is a femoral condyle surface of a femoral prosthesis trial and the femoral trochlear surface is a femoral trochlear surface of a femoral prosthesis trial when the knee replacement procedure is in a stage in which both the tibial plateau and the femur have been resected.
In an embodiment, the pressure sensors in the first and second arrays of pressure sensors are capacitive pressure sensors.
The pressure measurement method provided by the embodiment of the present application can be applied to the first embodiment, and for details, reference is made to the description of the first embodiment, and details are not repeated here.
It should be understood that, the sequence numbers of the steps in this embodiment do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiment of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A pressure measurement system for knee replacement surgery, the pressure measurement system comprising a first pressure sensor array, a second pressure sensor array and a pressure display, the first pressure sensor array being disposed on a femoral condyle surface of a knee joint, the second pressure sensor array being disposed on a femoral trochlear surface of the knee joint, the first pressure sensor array and the second pressure sensor array being respectively connected to the pressure display;
the first pressure sensor array is used for collecting knee joint gap pressure and transmitting the knee joint gap pressure to the pressure display;
the second pressure sensor array is used for collecting patellar pressure of the knee joint and transmitting the patellar pressure to the pressure display;
the pressure display is used for displaying the knee joint gap pressure and the patellar pressure.
2. The pressure measurement system of claim 1, further comprising a gap filler sheet when the knee replacement procedure is in a stage where neither the tibial plateau nor the femur has been resected, or in a stage where the tibial plateau has been resected and the femur has not been resected;
the gap filling sheet is used for filling the gap of the knee joint.
3. The pressure measurement system of claim 2, wherein the pressure measurement system further comprises a terminal device;
the terminal equipment is used for acquiring a three-dimensional model of the knee joint; determining a three-dimensional model of a femoral condyle, a three-dimensional model of a tibial plateau and a three-dimensional model of a femoral pulley according to the three-dimensional model of the knee joint; and determining the gap filling sheet according to the three-dimensional model of the femoral condyle, the three-dimensional model of the tibial plateau and the three-dimensional model of the femoral pulley.
4. The pressure measurement system of claim 3, wherein the terminal device is specifically configured to:
and acquiring an electronic computer tomography image of the knee joint, and reconstructing a three-dimensional model of the knee joint according to the electronic computer tomography image.
5. The pressure measurement system of claim 1, wherein the pressure display is further to:
acquiring a change curve of the knee joint gap pressure in the process of performing target motion on the knee joint, and displaying the change curve of the knee joint gap pressure;
and acquiring a change curve of the patella pressure in the process of the knee joint performing the target motion, and displaying the change curve of the patella pressure.
6. The pressure measurement system of claim 5, wherein the pressure display is further to:
displaying a gap mode option and a patellar mode option;
when the selection operation of the gap mode option is detected, acquiring a change curve of the knee joint gap pressure, and displaying the change curve of the knee joint gap pressure;
when the selection operation of the patellar mode option is detected, acquiring the variation curve of the patellar pressure, and displaying the variation curve of the patellar pressure.
7. The pressure measurement system of claim 1, further comprising a mylar wrapping the first pressure sensor array and/or the second pressure sensor array.
8. The pressure measurement system of claim 1, wherein the femoral condyle surface is a femoral condyle surface of a trial of a femoral prosthesis and the femoral trochlear surface is a femoral trochlear surface of the trial of the femoral prosthesis when the knee replacement procedure is in a stage in which both the tibial plateau and the femur have been resected.
9. The pressure measurement system of any of claims 1-8, wherein the pressure sensors in the first array of pressure sensors and the second array of pressure sensors are capacitive pressure sensors.
10. A pressure measurement method for knee replacement surgery is applied to a pressure measurement system, and is characterized in that the pressure measurement system comprises a first pressure sensor array, a second pressure sensor array and a pressure display, the first pressure sensor array is arranged on the femoral condyle surface of a knee joint, the second pressure sensor array is arranged on the femoral trochlear surface of the knee joint, the first pressure sensor array and the second pressure sensor array are respectively connected with the pressure display, and the pressure measurement method comprises the following steps:
the first pressure sensor array collects knee joint gap pressure and transmits the knee joint gap pressure to the pressure display;
the second pressure sensor array collects patellar pressure of the knee joint and transmits the patellar pressure to the pressure display;
the pressure display displays the knee joint gap pressure and the patellar pressure.
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| CN202110365979.2A CN113116353B (en) | 2021-04-06 | 2021-04-06 | Pressure measurement system and pressure measurement method for knee joint replacement surgery |
| PCT/CN2022/090078 WO2022214104A1 (en) | 2021-04-06 | 2022-04-28 | Pressure measurement system and pressure measurement method for knee replacement surgery |
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| CN202110365979.2A CN113116353B (en) | 2021-04-06 | 2021-04-06 | Pressure measurement system and pressure measurement method for knee joint replacement surgery |
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| WO2022214104A1 (en) | 2022-10-13 |
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