CN220588366U - Device for measuring human skeleton structure space distance under arthroscope - Google Patents
Device for measuring human skeleton structure space distance under arthroscope Download PDFInfo
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- CN220588366U CN220588366U CN202321684871.0U CN202321684871U CN220588366U CN 220588366 U CN220588366 U CN 220588366U CN 202321684871 U CN202321684871 U CN 202321684871U CN 220588366 U CN220588366 U CN 220588366U
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- measuring head
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- 238000005259 measurement Methods 0.000 claims abstract description 23
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 claims description 17
- 210000000528 lesser trochanter Anatomy 0.000 description 7
- 238000002271 resection Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000001356 surgical procedure Methods 0.000 description 5
- 210000000689 upper leg Anatomy 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 210000001624 hip Anatomy 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- 208000012659 Joint disease Diseases 0.000 description 1
- 208000005137 Joint instability Diseases 0.000 description 1
- 206010039227 Rotator cuff syndrome Diseases 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000642 iatrogenic effect Effects 0.000 description 1
- 210000003692 ilium Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000011477 surgical intervention Methods 0.000 description 1
Abstract
The utility model belongs to the technical field of medical appliances, and relates to a device for measuring the space distance of a human skeleton structure under an arthroscope. The device and the arthroscope are placed in a joint cavity, bone conditions are observed through the arthroscope, the point position to be measured is determined, the position of a mark is marked through a measuring head, the opening and closing angles of the two measuring heads are controlled through a driving handle so as to match the position of the mark point, and then the distance value of the measuring point is read through a host. The utility model realizes the functions of displaying the measurement result, calibrating the measurement device, marking and measuring bones, controlling the opening and closing of the electromagnetic measuring head, and the like, realizes the accurate measurement of the space distance of the bone structure in the narrow space, and avoids the errors and inconvenience in the prior art.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and relates to a device for measuring the space distance of a human skeleton structure under an arthroscope.
Background
Arthroscopic surgery involves cutting a number of small holes (about 10mm, also known as keyhole surgery) in the skin, inserting a long rod-shaped camera or surgical instrument into the joint cavity of a human body filled with an electrolyte liquid environment, and operating by a doctor under the monitoring of a display to diagnose and treat various joint diseases.
Modern medicine tends to individualize accurate treatment. Particularly in the case of locomotor system diseases, the ligament size, footprint, cartilage size, and lesion area of each individual are different, and accurate measurement of the data of each structure of the patient is the need for completion of the surgery. Although arthroscopic surgery provides advantages such as minimally invasive, convenient and fast, but its access bore is only about 10mm, and the operable range is little, and the intra-articular structure is serious irregular, curved surface structure is obvious, the diameter line that needs to be measured is general multidimensional, and current measuring tool can't satisfy accurate measuring demand.
At present, resecting the lesser trochanter of femur under arthroscope is a research hotspot for treating ischial femur impingement syndrome through clinical operation. Lesser trochanteric resections include lesser trochanteric complete resections and lesser trochanteric partial resections. The small rotor partial excision has the advantages of avoiding the complications of serious weakness of hip flexors, iatrogenic hip joint instability, ilium psoas atrophy and the like, and the operation key point is to plan the space distance of the small rotor to be excised. The lesser trochanter serves as a protruding bone structure on the femur, and the resection needs to take into account the height of the resection in the longitudinal direction and the length of the resection in the transverse direction. The measurement methods commonly used at present comprise in-vitro dynamic ultrasonic measurement and arthroscopic measuring scale method.
In the microscopic measurement method, a measuring ruler is placed in a joint cavity, and the size value of the defect is read under the mirror and the shape is depicted. The disadvantage is that the measuring ruler existing in the current medical market is hard in texture, the joint surface is provided with radian, the measuring ruler is difficult to be completely attached to the joint surface, and even the measuring ruler is sometimes measured to be an estimated value. Secondly, the joint cavity is required to be filled with electrolyte during arthroscopic surgery, the temperature is not constant, and the application of new materials such as the memory alloy is limited. In addition, the arthroscope has a certain magnification, and the lens of the arthroscope has a certain angle, usually a 30-degree included angle, so that the error of the measurement result is larger.
Disclosure of Invention
In view of the above, the present utility model aims to provide a device for measuring the spatial distance of human bone structure under arthroscope, which aims to solve the problem of accurately measuring bone structure under the electrolyte liquid environment in the narrow space of arthroscope.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a device for measuring the space distance of a human skeleton structure under an arthroscope comprises a driving handle, a connecting rod and an electromagnetic measuring head; one end of the connecting rod is connected with the driving handle, and the other end of the connecting rod is connected with the electromagnetic measuring head; the electromagnetic measuring head comprises two measuring heads, wherein one measuring head is provided with a permanent magnet, and the other measuring head is provided with a Hall sensor; the two measuring heads are hinged to the connecting rod to form a V-shaped structure; the driving handle drives the electromagnetic measuring head to open and close through the connecting rod;
during measurement, the tips of the two measuring heads are separated and respectively contacted with human bones, so that the distance between the Hall sensor and the permanent magnet is determined according to the relationship between the magnetic field intensity of the position of the Hall sensor and the induced voltage generated by the Hall sensor, the distance between the two measuring heads is obtained, and the spatial distance measurement of bones is realized.
Further, the device also comprises a host computer for calculating and displaying the measurement result, and a cable of the host computer is connected with the Hall sensor through the connecting rod.
Further, the device also comprises a calibration ruler, wherein a plurality of calibration holes with set intervals are formed in the calibration ruler; the host is provided with a calibration button; during calibration, the tips of the two measuring heads are respectively inserted into different calibration holes, the distances displayed correspondingly on the host computer are compared, and the display value is corrected through the calibration button to be the same as the distance between the calibration holes.
Further, two measuring heads are provided with a joint plane on one side opposite to each other, grooves are formed in the plane, and the Hall sensor and the permanent magnet are respectively arranged in the grooves.
Further, the tip of the measuring head is provided with a helical cutting edge to facilitate marking on the bone while preventing sliding of the measuring head when it contacts the bone.
Further, two measuring heads are hinged to the connecting rod, synchronous pulleys are arranged on the two measuring heads, two synchronous belts are arranged in the connecting rod and meshed with the two synchronous pulleys in a one-to-one correspondence mode, and the two measuring heads are driven to rotate.
Further, two driving motors are arranged in the driving handle and are respectively connected with the two synchronous belts in a one-to-one correspondence manner; the driving handle is also provided with a motor button for controlling the rotation of the two driving motors; the two driving motors drive the two measuring heads to independently rotate through the synchronous belt, so that the electromagnetic measuring head is opened and closed.
The utility model has the beneficial effects that:
1. according to the utility model, through the design of the electromagnetic measuring head, the accurate measurement of the space distance of the skeleton structure of the human body in the electrolyte liquid environment in the narrow space of the arthroscope is realized, and the measurement error and inconvenience in the prior art are avoided; through the design of the host computer, the calculation and the display of the measurement result are realized, and the operation and the judgment of doctors are facilitated.
2. According to the utility model, through the design of the calibrating ruler and the calibration of the measuring device, the errors of the Hall sensor caused by the magnetic force decay of the permanent magnet and the change of the magnetic field direction are avoided, and the measuring accuracy is ensured.
3. The utility model realizes the marking and skid resistance of bones through the design of the spiral cutting edge, and improves the efficiency and safety of measurement; through the design of hold-in range and driving motor, realized opening and shutting control to the electromagnetic gauge head, increased measuring flexibility and adaptability.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of an arthroscopic apparatus for measuring the spatial distance of human skeletal structures.
FIG. 2 is a schematic view of a measuring head according to the present utility model.
FIG. 3 is a schematic diagram of the control of the measuring head according to the present utility model.
FIG. 4 is a schematic view of a scale according to the present utility model.
Reference numerals: 1-an electromagnetic measuring head; 2-measuring head; 3-permanent magnets; 4-connecting rods; 5-driving a handle; a 6-hall sensor; 7-plane; 8-grooves; 9-synchronous pulleys; 10-synchronous belt; 11-a host; 12-a cable; 13-calibrating a ruler; 14-calibrating the hole; 15-a calibration button; 16-spiral cutting edge; 17-a drive motor; 18-motor button.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 4, the device for measuring the space distance of the skeleton structure of a human body under an arthroscope comprises a driving handle 5, a connecting rod 4 and an electromagnetic measuring head 1; one end of the connecting rod 4 is connected with the driving handle 5, and the other end is connected with the electromagnetic measuring head 1; the electromagnetic measuring head 1 comprises two measuring heads 2, wherein one measuring head 2 is provided with a permanent magnet 3, and the other measuring head 2 is provided with a Hall sensor 6; the two measuring heads 2 are hinged on the connecting rod 4 to form a V-shaped structure; the driving handle 5 drives the electromagnetic measuring head 1 to open and close through the connecting rod 4.
The two measuring heads 2 are provided with a joint plane 7 on one side opposite to each other, a groove 8 is arranged on the plane 7, and the Hall sensor 6 and the permanent magnet 3 are respectively arranged in the groove 8. This ensures that the change in distance between the hall sensor 6 and the permanent magnet 3 is proportional to the change in distance between the two measuring heads 2. Simultaneously, the plane 7 can make two measuring heads 2 closely laminate when closed, prevents debris entering.
The hall sensor 6 is a device for measuring the intensity of a magnetic field using the hall effect, among others. The output voltage of the hall sensor is proportional to the magnetic field strength and can therefore be used to measure the distance from a single permanent magnet, since the magnetic field strength is inversely proportional to the distance. One common measurement method is direct measurement, i.e. the output voltage of the hall sensor is sent to a calibrated display, i.e. the measured distance is directly derived from the value of the voltage. The method has the advantages of simple structure and higher accuracy and linearity of the measurement result.
In order to implement this method, it is necessary to know the sensitivity coefficient K of the hall sensor, i.e., the ratio of the output voltage to the magnetic field strength. The distance d to the permanent magnet can then be calculated using the following formula:
wherein B is 0 Is the magnetic induction intensity of the surface of the permanent magnet, V H Is the output voltage of the Hall sensor;
the calculation formula of the output voltage of the Hall sensor is as follows:
wherein, H is the hall effect coefficient, I is the current through the sensor, B is the magnetic field strength, and t is the thickness of the sensor.
The two measuring heads 2 are hinged with the connecting rod 4, synchronous pulleys 9 are fixedly arranged on the two measuring heads 2, two synchronous belts 10 are arranged in the connecting rod 4, supporting pulleys are arranged in the middle of the synchronous belts 10, and the two synchronous belts 10 are meshed with the two synchronous pulleys 9 in a one-to-one correspondence manner to drive the two measuring heads 2 to rotate. This ensures rotational stability of the two measuring heads 2.
In this embodiment, the device further includes a host 11 for calculating and displaying a measurement result, a cable of the host 11 is connected with the hall sensor 6 through the connecting rod 4, a cable on the hall sensor 6 adopts a flexible cable with bending resistance, and a length change space distance when the measuring head 2 deflects is reserved. The host 11 can calculate the distance between the hall sensor 6 and the permanent magnet 3 according to the output voltage of the hall sensor 6 through a preset functional relationship, and display the distance on the screen of the host 11.
In this embodiment, the device further includes a calibration ruler 13, and a plurality of calibration holes 14 with set intervals are arranged on the calibration ruler 13; the host 11 is provided with a calibration button 15; in calibration, the tips of the two measuring heads 2 are respectively inserted into different calibration holes 14, compared with the corresponding displayed distance on the host computer 11, and the display value is corrected by the calibration button 15 to be the same as the distance between the calibration holes 14. Therefore, the measurement error caused by the voltage change of the Hall sensor 6 due to the magnetic force decay of the permanent magnet 3 can be avoided, meanwhile, the two measuring heads 2 are subjected to sectional calibration according to different opening angles, and the influence of the magnetic field direction change caused by the circular arc movement between the two measuring heads on the voltage change of the Hall sensor 6 can be reduced, so that the accuracy is further improved.
The tips of the two measuring heads 2 are provided with a helical cutting edge 16 to facilitate marking on the bone while preventing the measuring heads 2 from sliding when they contact the bone. Two driving motors 17 are arranged in the driving handle 5, and the two driving motors 17 are respectively connected with the two synchronous belts 10 in a one-to-one correspondence manner; the driving handle 5 is also provided with a motor button 18 for controlling the rotation of the two driving motors 17; the two driving motors 17 drive the two measuring heads 2 to independently rotate through the synchronous belt 10, so that the electromagnetic measuring head 1 is opened and closed.
The device for measuring the space distance of the human skeleton structure under the arthroscope in the embodiment is adopted for measurement, and comprises the following steps:
s1, placing a device for measuring the space distance of a human skeleton structure under an arthroscope and the arthroscope in a joint cavity through an operation channel;
s2, observing the condition of bones through an arthroscope, determining the point position to be measured, and marking the position on the bones through the tip of the measuring head 2;
s3, controlling the opening and closing angles of the two measuring heads 2 through the driving handle 5 to match the positions of the marking points, and then reading the distance values of the measuring points through the host 11.
Before measurement, the device for measuring the space distance of the human skeleton structure under the arthroscope is calibrated through the calibrating ruler 13, the tips of the two measuring heads 2 are respectively inserted into different calibrating holes 14, the standard distance of the calibrating holes 14 is compared with the distance correspondingly displayed on the host 11, and the display value is corrected to be the same as the distance of the calibrating holes 14 through the calibrating button 15, so that the measurement error caused by the voltage change of the Hall sensor 6 due to the magnetic force decay of the permanent magnet 3 is avoided.
Taking a hip arthroscope femur lesser trochanter partial resection as an example, the specific operation steps are as follows:
s1, placing an arthroscope and the device of the utility model into a hip joint through a surgical channel, and observing the shape and the size of a femur lesser trochanter through the arthroscope;
s2, controlling the electromagnetic measuring heads 1 to open and close through the driving handle 5, enabling the tips of the two measuring heads 2 to respectively contact the highest point and the lowest point of the lesser trochanter of the femur, and marking mark lines on bones by using the spiral cutting edges 16 at corresponding positions;
s3, reading a distance value between two mark points through the host 11 and displaying the distance value on a screen, namely the height of the femur lesser trochanter;
s4, repeating the steps, measuring the length and the width of the femoral head respectively, and recording corresponding distance values;
and calculating the volume or surface area and other parameters of the lesser trochanter of the femur according to the obtained distance value, comparing the parameters with a normal range, and judging whether surgical intervention is needed or selecting a proper implant.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (7)
1. A device for measuring the space distance of a human skeleton structure under an arthroscope, which is characterized in that: comprises a driving handle, a connecting rod and an electromagnetic measuring head; one end of the connecting rod is connected with the driving handle, and the other end of the connecting rod is connected with the electromagnetic measuring head; the electromagnetic measuring head comprises two measuring heads, wherein one measuring head is provided with a permanent magnet, and the other measuring head is provided with a Hall sensor; the two measuring heads are hinged to the connecting rod to form a V-shaped structure; the driving handle drives the electromagnetic measuring head to open and close through the connecting rod;
during measurement, the tips of the two measuring heads are separated and respectively contacted with human bones, so that the distance between the Hall sensor and the permanent magnet is determined according to the relationship between the magnetic field intensity of the position of the Hall sensor and the induced voltage generated by the Hall sensor, the distance between the two measuring heads is obtained, and the measurement of the bone space distance is realized.
2. The arthroscopic apparatus for measuring human skeletal structural spatial distances according to claim 1, wherein: the Hall sensor comprises a Hall sensor body, a connecting rod and a host computer, wherein the host computer is used for calculating and displaying a measurement result, and a cable of the host computer passes through the connecting rod and is connected with the Hall sensor.
3. The arthroscopic apparatus for measuring human skeletal structural spatial distances according to claim 2, wherein: the device also comprises a calibration ruler, wherein a plurality of calibration holes with set intervals are formed in the calibration ruler; the host is provided with a calibration button; during calibration, the tips of the two measuring heads are respectively inserted into different calibration holes, the distances displayed correspondingly on the host computer are compared, and the display value is corrected through the calibration button to be the same as the distance between the calibration holes.
4. The arthroscopic apparatus for measuring human skeletal structural spatial distances according to claim 1, wherein: and one side of each measuring head, which is opposite to the other side of each measuring head, is provided with a joint plane, the plane is provided with a groove, and the Hall sensor and the permanent magnet are respectively arranged in the groove.
5. The arthroscopic apparatus for measuring human skeletal structural spatial distances according to claim 1, wherein: the tip of the measuring head is provided with a helical cutting edge to facilitate marking on the bone while preventing sliding of the measuring head when it contacts the bone.
6. The arthroscopic apparatus for measuring human skeletal structural spatial distances according to claim 1, wherein: the two measuring heads are hinged with the connecting rod, synchronous pulleys are arranged on the two measuring heads, two synchronous belts are arranged in the connecting rod and meshed with the two synchronous pulleys in a one-to-one correspondence manner, and the two measuring heads are driven to rotate.
7. The arthroscopic apparatus of claim 6 wherein: two driving motors are arranged in the driving handle and are respectively connected with the two synchronous belts in a one-to-one correspondence manner; the driving handle is also provided with a motor button for controlling the rotation of the two driving motors; the two driving motors drive the two measuring heads to independently rotate through the synchronous belt, so that the electromagnetic measuring head is opened and closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684871.0U CN220588366U (en) | 2023-06-29 | 2023-06-29 | Device for measuring human skeleton structure space distance under arthroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684871.0U CN220588366U (en) | 2023-06-29 | 2023-06-29 | Device for measuring human skeleton structure space distance under arthroscope |
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| Publication Number | Publication Date |
|---|---|
| CN220588366U true CN220588366U (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321684871.0U Active CN220588366U (en) | 2023-06-29 | 2023-06-29 | Device for measuring human skeleton structure space distance under arthroscope |
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| Country | Link |
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| CN (1) | CN220588366U (en) |
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2023
- 2023-06-29 CN CN202321684871.0U patent/CN220588366U/en active Active
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