CN113069222A - Device and method for detecting pressure between bones in bone joint operation - Google Patents
Device and method for detecting pressure between bones in bone joint operation Download PDFInfo
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- CN113069222A CN113069222A CN202110377559.6A CN202110377559A CN113069222A CN 113069222 A CN113069222 A CN 113069222A CN 202110377559 A CN202110377559 A CN 202110377559A CN 113069222 A CN113069222 A CN 113069222A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims description 16
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- 238000001514 detection method Methods 0.000 claims description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000004831 Hot glue Substances 0.000 claims description 3
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- 238000005259 measurement Methods 0.000 abstract description 3
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- 239000010959 steel Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 238000012545 processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
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- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 208000020084 Bone disease Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000006670 Multiple fractures Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
- A61B2090/065—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension for measuring contact or contact pressure
Abstract
The invention discloses a device for accurately detecting the pressure between bones in a bone joining operation, belonging to the technical field of devices for detecting the pressure between bones in the bone joining operation; the technical problem to be solved is as follows: an improvement in the structure of a device for accurately detecting the pressure between bones in a bone joining operation; the technical scheme for solving the technical problems is as follows: the portable pressure sensor comprises a handheld shell, wherein the handheld shell comprises a handle, a display screen and a switch button are arranged on the front surface of the handheld shell, a convex pressure sensor and a control circuit board are fixed inside the handheld shell, the convex pressure sensor comprises a micro pressure sensor and metal sheets which are arranged on the upper surface and the lower surface of the micro pressure sensor to form cantilever arms, the metal sheets on the upper surface of the micro pressure sensor are convex, and two ends of the cantilever arms of the convex pressure sensor respectively extend out of two ends of the handheld shell; the invention is applied to the measurement of the pressure between bones.
Description
Technical Field
The invention discloses an interosseous pressure detection device and method in a bone joining operation, and belongs to the technical field of devices for detecting the interosseous pressure in the bone joining operation.
Background
With the development of society, the pace of life of people is faster and more, the activity intensity is stronger, more and more people suffer from bone diseases such as fracture and the like due to various reasons and need to carry out the bone joining operation, and in the clinical treatment of the bone joining operation, the proper control of the pressure between human bones plays a key role in the normal healing of broken bones. In recent years. In clinical treatment of a bone joint operation, after a broken bone is generally reduced and fixed by a through nail, a certain compressive stress is applied to a bone by a bracket through thigh muscles to promote the growth of the broken bone, the magnitude of the pressure between bones depends on the experience of a doctor or a rough pressure estimation is carried out, and a method and a means for accurately measuring and quantifying the magnitude of the pressure between bones are not provided. Therefore, aiming at the problems that the pressure detection accuracy is low and the size of the detection device does not meet the size of the bone gap in the prior art, the device and the method which can quantitatively and accurately measure and are suitable for detecting the size of the bone gap pressure are provided.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problems that: provides an improvement of the structure of an interosseous pressure detection device in a bone coaptation operation.
In order to solve the technical problems, the invention adopts the technical scheme that: the interosseous pressure detection device in the skeletal joint operation comprises a handheld shell, wherein the handheld shell comprises a handle, a display screen and a switch button are arranged on the front surface of the handheld shell, a convex pressure sensor and a control circuit board are fixed inside the handheld shell, the convex pressure sensor comprises a micro pressure sensor and metal sheets which are arranged on the upper surface and the lower surface of the micro pressure sensor to form cantilever arms, the metal sheets on the upper surface of the micro pressure sensor are convex, and two ends of each of the cantilever arms of the convex pressure sensor extend out of two ends of the handheld shell respectively;
and a microcontroller is integrated on the control circuit board and is respectively connected with the display screen, the switch button and the miniature pressure sensor through leads.
The two ends of the hand-held shell are provided with detachable sleeve covers.
The metal sheet is a stainless steel sheet, and the thickness of the stainless steel sheet is set to be 0.1mm-1 mm.
The miniature pressure sensor and the metal sheet are fixed through hot melt adhesive.
The hand-held shell is specifically designed to be cylindrical or square.
The micro pressure sensor is specifically SBT760F in model number, and the thickness of the sensor is 3.5 mm.
The thickness between the upper and lower suspension beam arms of the convex pressure sensor is set to be 1-3 mm.
A method for detecting pressure between bones in a bone joining operation comprises the following steps:
the method comprises the following steps: opening the sleeve covers at the two ends of the hand-held shell, and disinfecting the metal sheets at the two ends of the convex pressure sensor;
step two: directly inserting a metal sheet at one end of a detection device into a bone gap to be detected, and displaying a detected pressure value F1 on a display screen through a calculation formula F1= 0.447F +0.0152, wherein F is a pressure value measured when the metal sheet is contacted with the bone, and F1 is a pressure value measured at one end of the detection device by a miniature pressure sensor;
step three: directly inserting the metal sheet at the other end of the detection device into a bone gap to be detected, and displaying a detected pressure value F2 on a display screen through a calculation formula F2= 0.459F-0.0878, wherein F is the pressure value measured when the metal sheet is contacted with the bone, and F2 is the pressure value measured by the miniature pressure sensor at the other end of the detection device;
step four: comparing the sizes of F1 and F2, and taking F = F1+ F2/2 when the monitored values of the two are the same or within a set error range, wherein F is the actual pressure size value of the bone gap; when the monitoring values of the two are different or exceed the set error range, eliminating the error value, and repeating the second step;
step five: after the bone clearance pressure value is measured, the metal sheets at the two ends of the convex pressure sensor are disinfected again and then sleeved with the sleeve cover.
The error range set in the third step is that the difference between F1 and F2 is within +/-0.1 mm.
Compared with the prior art, the invention has the beneficial effects that: the device for detecting the pressure of the bone gap in the bone joining operation can accurately detect the pressure between bones and display the pressure in a quantitative form, so that a doctor can more quickly acquire the pressure between bones in the bone joining operation, the operation time is saved, and the operation success rate is improved; the linkage device of the convex pressure sensor has obvious functional relation characteristics, so that the problem that the size of the detection device does not meet the size of a bone gap at present is solved, and the requirements of quantification and accurate pressure size in a bone joint operation are met due to the high accuracy of the sensor and the proper signal processing.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a convex pressure sensor according to the present invention;
FIG. 3 is a schematic diagram of the force applied to the bone-steel plate contact portion and the force generated by the pressure sensor of the calibration test of the present invention;
FIG. 4 is a graphical representation of the correlation of F to F for the calibration test of the present invention;
FIG. 5 is a graph of F as a function of F for a calibration test of the present invention;
in the figure: the pressure sensor comprises a handheld shell 1, a display 2, a switch button 3, a convex pressure sensor 4, a sleeve cover 5, a miniature pressure sensor 41 and a metal sheet 42.
Detailed Description
As shown in fig. 1 to 5, the device for detecting pressure between bones in a bone joining operation of the present invention comprises a handheld housing 1, wherein the handheld housing 1 comprises a handle, a display screen 2 and a switch button 3 are arranged on the front surface of the handheld housing 1, a convex pressure sensor 4 and a control circuit board are fixed inside the handheld housing 1, the convex pressure sensor 4 comprises a micro pressure sensor 41 and metal sheets 42 arranged on the upper and lower surfaces of the micro pressure sensor 41 to form a cantilever, wherein the metal sheet arranged on the upper surface of the micro pressure sensor 41 is convex, and two ends of the cantilever of the convex pressure sensor 4 extend out of two ends of the handheld housing 1 respectively;
and a microcontroller is integrated on the control circuit board and is respectively connected with the display screen 2, the switch button 3 and the miniature pressure sensor 41 through leads.
The two ends of the hand-held shell 1 are provided with detachable covers 5.
The metal sheet 42 is a stainless steel sheet, and the thickness of the stainless steel sheet is set to be 0.1mm-1 mm.
The micro pressure sensor 41 and the metal sheet 42 are fixed by hot melt adhesive.
The hand-held housing 1 is specifically configured to be cylindrical or square.
The micro pressure sensor 41 is specifically of the type SBT760F, and the thickness of the sensor is 3.5 mm.
The thickness between the upper and lower cantilever beams of the convex pressure sensor 4 is set to be 1mm-3 mm.
A method for detecting pressure between bones in a bone joining operation comprises the following steps:
the method comprises the following steps: opening the sleeve covers 5 at the two ends of the hand-held shell 1, and disinfecting the metal sheets at the two ends of the convex pressure sensor;
step two: the metal sheet 42 at one end of the detection device is directly inserted into a bone gap with pressure to be detected, and a detected pressure value F1 is displayed on the display screen 2 through a calculation formula F1= 0.447F +0.0152, wherein F is the pressure value measured when the metal sheet 42 is contacted with the bone, and F1 is the pressure value measured by the miniature pressure sensor at one end of the detection device;
step three: the metal sheet 42 at the other end of the detection device is directly inserted into a bone gap with pressure to be detected, and a detected pressure value F2 is displayed on the display screen 2 through a calculation formula F2= 0.459F-0.0878, wherein F is the pressure value measured by the metal sheet 42 contacting the bone, and F2 is the pressure value measured by the miniature pressure sensor at the other end of the detection device;
step four: comparing the sizes of F1 and F2, and taking F = F1+ F2/2 when the monitored values of the two are the same or within a set error range, wherein F is the actual pressure size value of the bone gap; when the monitoring values of the two are different or exceed the set error range, eliminating the error value, and repeating the second step;
step five: after the bone clearance pressure value is measured, the metal sheets at the two ends of the convex pressure sensor are disinfected again and then sleeved with the sleeve cover.
The error range set in the third step is that the difference between F1 and F2 is within +/-0.1 mm. The invention provides a device for quantitatively detecting pressure applied to a bone gap in a bone joining operation. The device comprises a miniature pressure sensor (the thickness of the sensor is 3.5mm) with the model number of SBT760F, a stainless steel sheet, a hardware control circuit board and a shell; wherein, the stainless steel sheets are fixed on the upper and lower surfaces of the miniature pressure sensor to form a linkage device of the convex pressure sensor. When the bone gap pressure is measured in the bone jointing operation, the stainless steel sheet of the convex pressure sensor is contacted with the upper surface and the lower surface of the bone gap, and pressure data is displayed after the acquisition and the related signal processing, thereby achieving the purpose of meeting the requirement of detecting the bone gap pressure.
(1) Sensor usage design
Since the device is used for detecting the pressure applied to the bone gap, the requirement for the thinness of the detection part contacting with the bone gap is higher. Therefore, the use of the sensor needs to be modified, namely, the stainless steel sheet and the pressure sensor form a convex pressure sensor device for detecting the pressure applied to the bone gap. Wherein, the stainless steel sheets are fixed on the upper and lower surfaces of the micro pressure sensor to form a cantilever beam. When the bone gap pressure is measured in the bone jointing operation, the cantilever beam is contacted with the upper surface and the lower surface of the bone gap, thereby achieving the purpose of detecting the size of the bone gap pressure. The use of the sensor modifies the overall design as shown in figure 2.
(2) Housing design for detection device
A shell design for a bone gap pressure detection device in a bone joint operation is mainly characterized by being light and portable, and is finally determined to be a hand-held detection device by taking the use design of a sensor into consideration, wherein a hand-held part is mainly a cylinder, namely a circular handle shown in figure 1, an OLED display screen and a switch button are reserved on the cylinder part, extending parts at two ends of the cylinder are stainless steel sheets, namely the stainless steel sheets extend out and are fixed from two cantilever steel sheet openings at two ends of the cylinder, and sleeve covers are designed on the extending parts of the stainless steel sheets so as to cover the extending parts when not used, so that the shell is convenient to carry and store.
(3) Application method
When a doctor needs to detect the pressure of the bone gap in a bone joining operation, the sleeve covers on the two sides of the detection device are opened, after sterilization, one end of the detection device is directly inserted into the bone gap, the display screen records and displays the pressure, the other end of the detection device is also directly inserted into the bone gap, the display screen records and displays the pressure, and if the two detection data are the same or within an error allowable range (plus or minus 0.1N), the average pressure data of the two times are taken as the pressure data of the bone gap at the moment. Finally, after use and sterilization, the cover is covered.
(4) Signal acquisition
The accuracy of the pressure signal can be ensured by adopting a quantitative measurement method, and the micro pressure sensor has the characteristic of quantitative measurement and good accuracy and linearity, so that the micro pressure sensor is applied to acquire the pressure signal.
(5) Signal processing
Because the bone gap is in direct contact with the stainless steel sheet, the pressure sensor is stressed to generate an analog signal, and the analog signal is not the signal of the contact part of the stainless steel sheet and the bone gap, the corresponding calibration of the signals of the contact part of the bone-steel sheet and the pressure sensor is needed. The calibration is carried out through a large number of experiments to obtain a calibrated formula, algorithm relation between a bone-steel sheet contact part and a pressure sensor signal is realized through software, then analog-to-digital conversion is carried out on a calibrated analog signal, correspondence between the pressure signal and force is realized through error elimination and a related algorithm, and finally the pressure signal and the force are displayed through a display screen.
(6) Calibration experiment
To verify the effectiveness of the "convex" version of the pressure sensor, calibration experiments were performed regarding the correspondence of the signals between the bone-steel plate contact and the pressure sensor. Under the same measurement conditions, firstly, a force F with the same magnitude between 0 and 50N is applied to a bone-steel sheet contact part, a weight is used for replacing the force F by 0 to 5kg, g is 9.8N/kg, and the purpose of applying force on both sides of the convex type pressure sensor is mainly to verify whether the force F is the same on both sides under the condition of the same force magnitude so as to ensure the feasibility and the effectiveness of the device. Then, the signals of the miniature pressure sensor are collected, processed and displayed twice, and corresponding F1 and F2 are recorded, so that the test is a group of experiments. A schematic diagram of the force applied to the bone-steel plate contact and the force generated by the pressure sensor is shown in FIG. 3. in the case of the same size F on both sides of the "convex" type pressure sensor, 49 sets of data corresponding to F and F were obtained through 49 experiments, as shown in tables 1 and 2 below.
TABLE 1
TABLE 2
Data sorting is carried out through an Origin software platform, and the corresponding group data of the experiment is visualized so as to clearly see the relevance of the data, and the relevance of F and F is shown in FIG. 4. It can be seen that F has a certain functional relationship with F. The data is then fitted by means of Matlab software to obtain a plot of F as a function of F, as shown in fig. 5, and the fitted function, i.e. the formula to be calibrated. Obtaining the functional relation between F and F:
F1=0.447*f + 0.0152，F2=0.459*f - 0.0878。
from the above formula, it can be seen that the functional relationship between F1 and F2 is similar, and since F1 and F2 are the same value under F, in order to make the experimental result more accurate, the average functional relationship between F1 and F2 is taken to obtain
F=0.453*f - 0.0363。
And then, the formula is realized through software programming, namely, the calibration of the corresponding relation of the convex pressure sensor is completed. And finally, programming codes for realizing all functions of the device into a hardware circuit board through a download port to finish the assembly of hardware and realize the device.
The invention uses the linkage device of the convex pressure sensor formed by fixing the stainless steel sheets on the upper and lower surfaces of the miniature pressure sensor to detect the bone gap pressure in the bone joining operation, thereby realizing the quantification and the accurate size of the bone gap pressure
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An interosseous pressure detection device in a bone joint operation comprises a hand-held shell (1), and is characterized in that: the handheld shell (1) comprises a handle, a display screen (2) and a switch button (3) are arranged on the front surface of the handheld shell (1), a convex pressure sensor (4) and a control circuit board are fixed inside the handheld shell (1), the convex pressure sensor (4) comprises a micro pressure sensor (41) and metal sheets (42) which are arranged on the upper surface and the lower surface of the micro pressure sensor (41) to form cantilever arms, the metal sheets on the upper surface of the micro pressure sensor (41) are convex, and two ends of the cantilever arms of the convex pressure sensor (4) respectively extend out of two ends of the handheld shell (1);
the control circuit board is integrated with a microcontroller, and the microcontroller is respectively connected with the display screen (2), the switch button (3) and the miniature pressure sensor (41) through leads.
2. An apparatus for detecting pressure between bones in a bone joining operation as claimed in claim 1, wherein: the two ends of the hand-held shell (1) are provided with detachable covers (5).
3. An apparatus for detecting pressure between bones in a bone joining operation as claimed in any one of claims 1 or 2, wherein: the metal sheet (42) is a stainless steel sheet, and the thickness of the stainless steel sheet is set to be 0.1mm-1 mm.
4. An apparatus for detecting pressure between bones in a bone joining operation as claimed in claim 3, wherein: the micro pressure sensor (41) and the metal sheet (42) are fixed through hot melt adhesive.
5. An apparatus for detecting pressure between bones in a bone joining operation as claimed in claim 1, wherein: the hand-held shell (1) is cylindrical or square.
6. An apparatus for detecting pressure between bones in a bone joining operation as claimed in claim 1, wherein: the micro pressure sensor (41) is specifically SBT760F in model number, and the thickness of the sensor is 3.5 mm.
7. An apparatus for detecting pressure between bones in a bone joining procedure as claimed in claim 6, wherein: the thickness between the upper suspension beam arm and the lower suspension beam arm of the convex pressure sensor (4) is set to be 1-3 mm.
8. A method for detecting pressure between bones in a bone joining operation is characterized in that: the method comprises the following steps:
the method comprises the following steps: opening the sleeve covers (5) at the two ends of the hand-held shell (1) and disinfecting the metal sheets at the two ends of the convex pressure sensor;
step two: directly inserting a metal sheet (42) at one end of the detection device into a bone gap with pressure to be detected, and displaying a detected pressure value F1 on a display screen (2) through a calculation formula F1= 0.447F +0.0152, wherein F is a pressure value measured when the metal sheet (42) is contacted with the bone, and F1 is a pressure value measured at one end of the detection device by a miniature pressure sensor;
step three: directly inserting the metal sheet (42) at the other end of the detection device into a bone gap with pressure to be detected, and displaying a detected pressure value F2 on a display screen (2) through a calculation formula F2= 0.459F-0.0878, wherein F is the pressure value measured when the metal sheet (42) is contacted with the bone, and F2 is the pressure value measured at the other end of the detection device by a miniature pressure sensor;
step four: comparing the magnitudes of F1 and F2, and taking F = (F1 + F2)/2 when the monitored values of the two values are the same or within a set error range, wherein F is the actual pressure magnitude value of the bone gap; when the monitoring values of the two are different or exceed the set error range, eliminating the error value, and repeating the second step;
step five: after the bone clearance pressure value is measured, the metal sheets at the two ends of the convex pressure sensor are disinfected again and then sleeved with the sleeve cover.
9. The method of claim 8 for detecting pressure between bones during a bone joining procedure, comprising: the error range set in the third step is that the difference between F1 and F2 is within +/-0.1 mm.
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