CN111214316A

CN111214316A - Artificial hip joint pressure measuring instrument

Info

Publication number: CN111214316A
Application number: CN201911147247.5A
Authority: CN
Inventors: 姚庆强; 王黎明; 张惠康
Original assignee: Nanjing Dongshang Biotechnology Co ltd
Current assignee: Nanjing Dongshang Biotechnology Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-06-02

Abstract

The invention relates to the technical field of medical operation auxiliary equipment, and discloses an artificial hip joint pressure measuring instrument which comprises an acetabulum lining test mold, wherein the acetabulum lining test mold consists of an acetabulum lining shell, a pressure sensor and a Bluetooth signal emitter, and the acetabulum lining test mold can be in data connection with computer equipment. The artificial hip joint pressure measuring instrument can improve the prosthesis installation precision of the artificial total hip joint replacement operation to obtain more ideal stress distribution, thereby improving the curative effect of the artificial total hip joint replacement operation, and can be used for treating femoral neck fracture, femoral head necrosis, hip joint osteoarthritis, hip joint stiffness, hip joint rheumatoid arthritis, acetabular dysplasia, hip primary/metastatic bone tumor and other serious hip joint bone lesions accompanied with joint damage.

Description

Artificial hip joint pressure measuring instrument

Technical Field

The invention relates to the technical field of medical operation auxiliary equipment, in particular to an artificial hip joint pressure measuring instrument.

Background

Many diseases that cause pain, limited mobility and disability in the hip joint, and common diseases in joint surgery include: femoral neck fracture, femoral head necrosis, hip osteoarthritis, hip ankylosis, hip rheumatoid arthritis, acetabulum dysplasia, hip primary/metastatic bone tumor, and the like.

For the treatment of these diseases, artificial total hip replacement surgery (THA) is currently used in clinic. However, as hip arthropathy is often accompanied by a series of joint damages, the acetabulum becomes shallow, becomes small and even forms a prosthetic socket, and factors such as gluteus medius atrophy, peripheral vascular nerve joint capsule distortion and the like which are often accompanied bring difficulties to clinical treatment, so that the conventional artificial total hip joint replacement operation faces a plurality of difficulties such as reconstruction of an acetabulum structure, soft tissue balance of hip joints, limb length recovery and the like, and the treatment effect of the artificial total hip joint replacement is influenced.

The prior art shows that the soft tissue tension of the artificial total hip replacement operation plays an important role in the postoperative curative effect and the service life of the prosthesis. When a human body stands, the femoral eccentricity often influences the stability of the joint by influencing the moment of hip abductor muscles. Thus, the clinical application experience of THA suggests that: the hip joint rotation center of the THA is restored to the anatomical center, and the proper femur offset is selected to adjust the stress balance of the hip joint muscle group and the femur prosthesis after operation, which is an important factor for improving walking gait. An improper center of rotation of the prosthetic joint and too small a femur offset will bring the femur close to the pelvis, reducing the range of motion of the hip joint and the tension of the soft tissue surrounding the hip joint, resulting in instability of the joint and dislocation of the hip joint. This imbalance in post-THA stress may also result in excessive local loading of the prosthesis, such that wear of the prosthesis occurs earlier after use, affecting the post-operative efficacy. However, there is no effective method for accurately measuring and evaluating the soft tissue tension of THA and the stress of the artificial femoral head-acetabular interface, other than depending on the hand feeling of the physician during the operation.

Disclosure of Invention

The invention provides an artificial hip joint pressure measuring instrument which can improve the prosthesis installation precision of the THA operation to obtain more ideal stress distribution, thereby improving the curative effect of the THA operation and can be used for treating femoral neck fracture, femoral head necrosis, hip osteoarthritis, hip ankylosis, hip rheumatoid arthritis, acetabular dysplasia, hip primary/metastatic bone tumor and other serious hip joint bone lesions accompanied with joint destruction.

The invention provides the following technical scheme: an artificial hip joint pressure measuring instrument comprises an acetabulum lining test mold, wherein the acetabulum lining test mold is composed of an acetabulum lining shell, a pressure sensor and a Bluetooth signal emitter, and the acetabulum lining test mold can be in data connection with computer equipment.

Preferably, the outer shape of the acetabular liner shell is a semi-dome-like structure and is matched with the acetabular cup prosthesis.

Preferably, a plurality of groups of Bluetooth signal reflectors are installed in the acetabulum lining test mold, the Bluetooth signal reflectors correspond to different quadrants, and the signal receiving range borne by each Bluetooth signal reflector is consistent.

Preferably, a plurality of pressure sensors are installed in the acetabulum lining test mold, the pressure sensors are installed on the inner side and the outer side of the acetabulum lining shell, the pressure sensors are flexible pressure sensors, and the number of the pressure sensors in each quadrant is not less than three.

Preferably, the computer device comprises a computer, a display and a bluetooth signal receiver, wherein a pressure data analysis and analysis program is installed in the computer.

Preferably, the flexible pressure sensor is a piezoresistive pressure sensitive element with a specific range of measuring ranges.

The invention has the following beneficial effects:

the invention overcomes the defect that the pressure of the artificial hip joint is evaluated only by depending on the hand feeling of a doctor in the existing artificial hip joint replacement operation, has the advantages of improving the prosthesis installation precision of the artificial hip joint replacement operation, obtaining more ideal stress distribution and improving the curative effect of the artificial hip joint replacement operation, and can be used for treating femoral neck fracture, femoral head necrosis, hip osteoarthritis, hip ankylosis, hip joint rheumatoid arthritis, acetabular dysplasia, primary/metastatic bone tumor of the hip and other serious hip joint bone lesions accompanied with joint destruction.

Drawings

FIG. 1 is a front view of an acetabular liner trial with a spatial orientation sensor of the invention;

FIG. 2 is a schematic view of the bottom of the acetabular liner trial with a spatial orientation sensor according to the present invention;

FIG. 3 is a top view of the acetabular liner trial with spatial orientation sensors of the invention;

FIG. 4 is a cross-sectional view of a trial version of the acetabular liner with spatial orientation sensors of the invention;

FIG. 5 is a schematic view of the trial installation position of the acetabular prosthesis with the spatial orientation sensor according to the invention;

FIG. 6 is an enlarged view of the trial installation position of the acetabular prosthesis with the spatial orientation sensor according to the invention.

In the figure: 1. an acetabular liner shell; 2. a pressure sensor; 3. and a Bluetooth signal emitter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an artificial hip joint pressure measuring instrument includes an acetabular lining test mold, which is composed of an acetabular lining shell 1, a pressure sensor 2 and a bluetooth signal emitter 3.

The appearance of acetabular liner shell 1 is similar semidome structure, with acetabular cup prosthesis phase-match, install multiunit bluetooth signal reflector 3 in the acetabular liner examination mould, bluetooth signal emitter 3 corresponds different quadrants, the signal reception scope that every bluetooth signal emitter 3 bore is unanimous, install a plurality of pressure sensor 2 in the acetabular liner examination mould, pressure sensor 2 installs inboard and the outside with acetabular liner shell 1, pressure sensor 2 is flexible pressure sensor, and the quantity of every quadrant pressure sensor 2 is no less than three, flexible pressure sensor 2 is the pressure resistance force sensitive element of specific range scope, lead to stress sensor when pressure passes, the sensor can pass through bluetooth signal emitter, with data transmission to computer.

The acetabulum lining test mold can be in data connection with computer equipment, the computer equipment comprises a computer, a display and a Bluetooth signal receiver, wherein a pressure data analysis and analysis program is installed in the computer, and the computer can receive and read real-time pressure parameters transmitted by a Bluetooth signal transmitter in the acetabulum lining test mold through the Bluetooth signal receiver; and recording and analyzing the pressure of each pressure sensor in the acetabular liner test molds of various assembly combinations through a pressure data analysis and analysis program, and displaying the pressure through a tablet computer to help doctors to evaluate the reasonability of prosthesis assembly in the artificial total hip replacement.

Stress data analysis program: calculating and displaying stress distribution in real time according to the distribution and stress values of the stress sensors; according to the structure of the hip joint, respectively carrying out digital reading on the pressure sensors in the acetabular liner test mold, respectively recording the difference values of the pressure sensors of the hip joint adduction, abduction, internal rotation and external rotation as an A, a, B, a, C, D and the total pressure difference value as: Δ =. Δ. A | +. Δ C | +. Ol; when the Link is minimum, the ideal security state of the hip joint prosthesis is achieved.

The theory of operation, during the operation, produce corresponding pressure, pressure conduction is to pressure sensor 2 departments, and the sensor passes through bluetooth signal transmitter promptly, with data transfer to computer, and the computer passes through bluetooth signal receiver and receives and reads the real-time pressure parameter of the transmission of bluetooth signal transmitter in the acetabular liner examination mould, rethread pressure data analysis and analysis program, records and analyzes the pressure of each pressure sensor in the acetabular liner examination mould of various assembly combinations to show through the display screen, be used for helping the doctor to evaluate the rationality of prosthesis assembly in artifical total hip joint replacement art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an artifical hip joint pressure measurement appearance, includes acetabular liner examination mould, its characterized in that: the acetabulum lining test mold is composed of an acetabulum lining shell (1), a pressure sensor (2) and a Bluetooth signal emitter (3), and the acetabulum lining test mold can be connected with computer equipment in a data mode.

2. The artificial hip joint pressure measuring instrument according to claim 1, wherein: the shape of the acetabulum lining shell (1) is a semi-dome-like structure and is matched with an acetabulum cup prosthesis.

3. The artificial hip joint pressure measuring instrument according to claim 1, wherein: a plurality of groups of Bluetooth signal reflectors (3) are installed in the acetabulum lining test mould, the Bluetooth signal reflectors (3) correspond to different quadrants, and the signal receiving range borne by each Bluetooth signal reflector (3) is consistent.

4. The artificial hip joint pressure measuring instrument according to claim 1, wherein: the acetabulum lining test mold is internally provided with a plurality of pressure sensors (2), the pressure sensors (2) are arranged on the inner side and the outer side of the acetabulum lining shell (1), the pressure sensors (2) are flexible pressure sensors, and the number of the pressure sensors (2) in each quadrant is not less than three.

5. The artificial hip joint pressure measuring instrument according to claim 1, wherein: the computer equipment comprises a computer, a display and a Bluetooth signal receiver, wherein a pressure data analysis and analysis program is installed in the computer.

6. The artificial hip joint pressure measuring instrument according to claim 4, wherein: the flexible pressure sensor (2) is a piezoresistive pressure sensitive element with a specific measuring range.