CN117064600A - Device for measuring intervertebral distraction force - Google Patents
Device for measuring intervertebral distraction force Download PDFInfo
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- CN117064600A CN117064600A CN202311047931.2A CN202311047931A CN117064600A CN 117064600 A CN117064600 A CN 117064600A CN 202311047931 A CN202311047931 A CN 202311047931A CN 117064600 A CN117064600 A CN 117064600A
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- 230000007246 mechanism Effects 0.000 claims abstract description 155
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000033001 locomotion Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 7
- 230000007480 spreading Effects 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 2
- 230000004927 fusion Effects 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 11
- 238000013486 operation strategy Methods 0.000 abstract description 3
- 238000002560 therapeutic procedure Methods 0.000 abstract description 3
- 206010066902 Surgical failure Diseases 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 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
- 238000003384 imaging method Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
- A61F2/4657—Measuring instruments used for implanting artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/02—Surgical instruments, devices or methods for holding wounds open, e.g. retractors; Tractors
- A61B17/025—Joint distractors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/02—Surgical instruments, devices or methods for holding wounds open, e.g. retractors; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
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- Prostheses (AREA)
Abstract
The invention provides a device for measuring intervertebral distraction force, which relates to the technical field of medical appliances and comprises a driving mechanism, a distraction mechanism, an elastic part, a pointer and a dial; the expanding mechanism is provided with a free state and a detection state, and in the free state, the pointer can be positioned at the initial position of the dial; the pointer can rotate relative to the dial under the detection state of the expanding mechanism so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism; the method has the advantages that the specific numerical indication of the intervertebral distraction force is realized, doctors can more intuitively judge specific therapies required by patients, reliable basis is provided for formulating unified operation strategies, different influences on operations caused by human experiences are avoided, and the technical problem that quantitative distraction data cannot be provided for the doctors in spinal fusion operations in the prior art, which possibly causes surgical failure due to insufficient distraction or excessive distraction of a fusion device, is solved.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a device for measuring intervertebral distraction force.
Background
The fusion operation is mainly aimed at solving the problem that the serious diseases of the spine can not be cured, and the problem can be solved by fusion of the spine. The method mainly comprises the following steps: taking a lesion segment as a center, making a linear incision, exposing the vertebral segments to be fused at the incision, positioning the implantation position and marking of the fusion device, expanding the intervertebral space, placing the fusion device test mould, compacting the bone-beating device, taking bone to plug into the inner cavity of the fusion device and tightly embedding the bone-beating device, implanting the fusion device, closing the incision, and sewing all layers.
In the prior art, in the related test mode operation related to the spinal fusion operation, such as the spinal fusion operation, whether the test mode is suitable or not is determined mainly by a doctor through experience and clinical practice hand feeling, is easily affected by human factors, and the determination is mainly based on qualitative description and cannot be accurately determined through quantitative determination; or the operation is complicated by side X-ray perspective observation, the operation efficiency is influenced, the judgment is carried out by an indirect method, the judgment cannot be carried out in a visual quantification mode, the imaging face angle and the artificial influence of an observer are easy, and therefore, the situation that the adjacent vertebral bodies are not fully spread or excessively spread in the process of spreading the adjacent vertebral bodies and driving the fusion device possibly occurs, discomfort or damage are caused to a patient after the implantation of the fusion device, and even the possibility of carrying out secondary operation correction is possibly caused.
Disclosure of Invention
The invention aims to provide a device for measuring intervertebral distraction force, which is used for relieving the technical problem that in the spinal fusion operation in the prior art, quantitative distraction data cannot be provided for doctors, and the operation failure is possibly caused by insufficient distraction or excessive distraction of a fusion device.
The invention provides a device for measuring intervertebral distraction force, comprising: the device comprises a driving mechanism, a spreading mechanism, an elastic part, a pointer and a dial;
the driving mechanism is rotationally connected with the opening mechanism, the driving mechanism is connected with the dial through the elastic part, the dial is connected with the opening mechanism, the dial moves synchronously with the opening mechanism, the pointer is connected with the driving mechanism, and the pointer moves synchronously with the driving mechanism;
the stretching mechanism is in a free state and a detection state, and in the free state, the driving mechanism and the stretching mechanism synchronously move so that the elastic part is in an unstressed state, and the pointer can be positioned at the initial position of the dial; under the detection state, one end of the expanding mechanism, which is far away from the dial, is used for being placed at the position between vertebrae, the driving mechanism and the expanding mechanism have relative movement under the action of intervertebral pressure, the elastic part is in a stress state under the relative operation of the dial and the driving mechanism, and the pointer can rotate relative to the dial so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism.
In a preferred embodiment of the present invention, the expanding mechanism comprises an expanding rod and an expanding shell;
the opening shell comprises a first end cover and a second end cover which are buckled in a sliding manner, a containing space is reserved between the first end cover and the second end cover, one end of the opening rod is of an oval structure, the oval structure is located in the containing space, the opening rod is connected with the driving mechanism, and the driving mechanism is used for driving the oval structure to rotate through the opening rod so as to adjust the distance between the first end cover and the second end cover through the rotating position of the oval structure.
In a preferred embodiment of the present invention, the elliptical structure has a short axis pitch and a long axis pitch, the short axis pitch is the same as an inner wall pitch of a fastened state between the first end cover and the second end cover, and the long axis pitch is longer than the short axis pitch by a preset distance, wherein the first end cover and the second end cover are used for being placed at a position between vertebrae, and the preset distance is a preset height of the first end cover and the second end cover for expanding the vertebrae.
In a preferred embodiment of the present invention, the spreading mechanism further comprises a limiting mechanism;
the limiting mechanism is positioned between the first end cover and the second end cover and is respectively connected with the first end cover and the second end cover so as to limit the first end cover and the second end cover to reciprocate along the direction relatively approaching or separating.
In a preferred embodiment of the present invention, the limiting mechanism includes a limiting post, a first limiting groove, a limiting clamping groove, a limiting plate and a second limiting groove;
the limiting clamping groove and the limiting column are both arranged on the first end cover, the limiting clamping groove is positioned on the inner wall of the first end cover, the expanding rod is provided with an annular groove corresponding to the limiting clamping groove, and the limiting clamping groove can be clamped in the annular groove so as to axially limit the expanding rod;
the first limiting groove is arranged on the second end cover, the limiting column and the first limiting groove are both positioned in the accommodating space, and the limiting column and the first limiting groove are in plug-in fit;
the limiting plates are arranged in a plurality, the limiting plates are arranged along the circumferential space of the side wall of the first end cover, the second end cover corresponds to the limiting plates, the limiting plates are arranged in a plurality of second limiting grooves at intervals, each limiting plate can be matched with one corresponding second limiting groove, the limiting plates are matched with the limiting grooves in a limiting mode, and the limiting columns are matched with the first limiting grooves in a limiting mode and used for limiting the first end cover and the second end cover to conduct linear motion in a relatively approaching or separating direction.
In a preferred embodiment of the present invention, the expanding mechanism further includes a spring plate;
the elastic sheet is fixedly connected with the inner walls of the first end cover and the second end cover respectively, and the elastic sheet has an elastic trend that the first end cover and the second end cover are relatively close.
In a preferred embodiment of the present invention, the driving mechanism comprises a force application handle and a transmission sleeve;
the force application handle is connected with one end of the transmission sleeve, and can drive the transmission sleeve to rotate;
the transmission sleeve is provided with a connecting channel, the expanding rod stretches into the connecting channel, the expanding rod is in threaded connection with the transmission sleeve, and the threaded connection force of the expanding rod and the transmission sleeve is matched with the acting force of the elastic sheet.
In a preferred embodiment of the present invention, the expanding mechanism further includes a first limiting pin, the expanding rod penetrates through the dial, and the expanding rod is in limiting connection with the dial in the circumferential direction through the first limiting pin;
the transmission sleeve comprises a first sleeve, a second limiting pin and a third limiting pin; the first sleeve is in butt joint with the second sleeve, the first sleeve and the second sleeve are in circumferential limit connection through the second limiting pin, and one end, away from the second sleeve, of the first sleeve is in circumferential limit connection with the force application handle through the third limiting pin;
the elastic part comprises a torsion spring, the dial is correspondingly arranged at one end of the second sleeve away from the first sleeve, the pointer is connected with the side wall of the second sleeve, the expanding rod penetrates through the second sleeve and is in threaded connection with the first sleeve, the torsion spring is sleeved outside the expanding rod, two ends of the torsion spring are respectively connected with the second sleeve and the dial, the torsion spring can transmit acting force applied by the second sleeve to the expanding rod through the dial, and the range of the expanding force applied by the force applying handle to the intervertebral is fed back through angle deflection of the torsion spring.
In a preferred embodiment of the invention, the device further comprises a fixed handle and an outer sleeve;
the outer sleeve is sleeved outside the opening rod, and the fixed handle is fixedly connected with the outer sleeve.
In a preferred embodiment of the present invention, the liquid through holes are penetrated at intervals along the side wall of the outer sleeve.
The invention provides a device for measuring intervertebral distraction force, comprising: the device comprises a driving mechanism, a spreading mechanism, an elastic part, a pointer and a dial; the driving mechanism is rotationally connected with the expanding mechanism, the driving mechanism is connected with the dial through the elastic part, the dial is connected with the expanding mechanism, the dial moves synchronously with the expanding mechanism, the pointer is connected with the driving mechanism, and the pointer moves synchronously with the driving mechanism; the stretching mechanism is in a free state and a detection state, and in the free state, the driving mechanism and the stretching mechanism synchronously move so that the elastic part is in an unstressed state, and the pointer can be positioned at the initial position of the dial; under the detection state, one end of the expanding mechanism, which is far away from the dial, is used for being placed at the intervertebral position, the driving mechanism and the expanding mechanism move relatively under the action of intervertebral pressure, the elastic part is in a stress state under the relative operation of the dial and the driving mechanism, and the pointer can rotate relative to the dial so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism; the pressure of the intervertebral to the opening mechanism is fed back through the stress of the elastic part, and the stress of the elastic part can be reflected through the rotation scale difference of the pointer and the dial, so that specific numerical indication of the intervertebral opening force is realized, a doctor can more intuitively judge specific therapy required by a patient, reliable basis is provided for formulating a unified operation strategy, different influences on the operation caused by human experience are avoided, and the technical problem that in the spinal fusion operation existing in the prior art, quantitative opening data cannot be provided for the doctor, and the operation failure is possibly caused by insufficient opening or excessive opening of the fusion device is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a device for measuring intervertebral distraction force according to an embodiment of the present invention;
fig. 2 is a schematic view of an overall structure of an apparatus for measuring intervertebral distraction force according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a front structure of an apparatus for measuring intervertebral distraction force according to an embodiment of the present invention;
FIG. 4 is a schematic view of a cross-sectional structure of the device for measuring an intervertebral distraction force provided by the embodiment of FIG. 3;
FIG. 5 is a schematic view of a partial enlarged structure of the device for measuring intervertebral distraction force provided by the embodiment of FIG. 4;
FIG. 6 is a schematic structural view of a distracting shell of an apparatus for measuring intervertebral distracting force according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating an internal structure of a distraction housing of a device for measuring an intervertebral distraction force according to an embodiment of the present invention.
Icon: 100-a driving mechanism; 101, a force application handle; 102-a transmission sleeve; 112-a first sleeve; 122-a second sleeve; 132-a third stop pin; 200-a spreading mechanism; 201-a spreader bar; 211-elliptical structure; 221-an annular groove; 202-opening the shell; 212-a first end cap; 222-a second end cap; 203-a limiting mechanism; 213-limit columns; 223-a first limit groove; 233-limit clamping grooves; 243-limiting plates; 253-a second limit groove; 204-shrapnel; 205-a first stop pin; 300-elastic part; 400-pointer; 500-dial; 600-fixed handle; 700-an outer sleeve; 701-liquid passing hole.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 7, the device for measuring an intervertebral distraction force according to the present embodiment includes: the driving mechanism 100, the opening mechanism 200, the elastic part 300, the pointer 400 and the dial 500; the driving mechanism 100 is rotationally connected with the expanding mechanism 200, the driving mechanism 100 is connected with the dial 500 through the elastic part 300, the dial 500 is connected with the expanding mechanism 200, the dial 500 and the expanding mechanism 200 synchronously move, the pointer 400 is connected with the driving mechanism 100, and the pointer 400 and the driving mechanism 100 synchronously move; the opening mechanism 200 has a free state and a detection state, and in the free state, the opening mechanism 200 and the driving mechanism 100 synchronously move so that the elastic part 300 is in an unstressed state, and the pointer 400 can be positioned at the initial position of the dial 500; in the detection state of the expanding mechanism 200, one end of the expanding mechanism 200 away from the dial 500 is used for being placed at the position between vertebrae, the driving mechanism 100 and the expanding mechanism 200 have relative movement under the action of the intervertebral pressure, the elastic part 300 is in a stressed state under the relative operation of the dial 500 and the driving mechanism 100, and the pointer 400 can rotate relative to the dial 500 so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism 100.
It should be noted that, the device for measuring the intervertebral distraction force provided in this embodiment can be used for specifically measuring the distraction force in the intervertebral distraction process in the fusion operation, in the normal process of implanting the fusion device, after the test mold is driven to test the height of the fusion device to be implanted, the test mold is extracted, the distraction mechanism 200 with the matched height is selected, after the acting end of the distraction mechanism 200 is driven to the intervertebral position, the distraction force is obtained after the acting end is slowly driven to the preset height, and the doctor can plan the subsequent operation step through the distraction force; specifically, the driving mechanism 100 is used as the driving end for opening and retracting the expanding mechanism 200, the driving mechanism 100 is rotationally connected with the expanding mechanism 200, the driving mechanism 100 and the expanding mechanism 200 have basic acting force, the basic acting force can ensure that the driving mechanism 100 directly drives the expanding mechanism 200 to open in an unstressed state, the deformation of the elastic part 300 can not be caused, the relative rotation of the pointer 400 and the dial 500 can not be caused, and the opening acting force of the expanding mechanism 200 is F when the expanding mechanism 200 is preset in a free state according to the formula 1 The base acting force of the driving mechanism 100 and the opening mechanism 200 is F 2 F in a free state 1 ＝F 2 The elastic part 300 is not stressed at this time; when the opening mechanism 200 is under the action of the intervertebral pressure, the opening mechanism 200 is openedForce F 1 +F 3 ，F 3 Is the intervertebral pressure, and F 3 F in the process of continuous opening between vertebrae 3 Will gradually increase, at this time, the force that the driving mechanism 100 needs to apply to the opening mechanism 200 is F 2 +F 4 ，F 1 +F 3 ＝F 2 +F 4 I.e. F 3 And F 4 Equal, F 4 Will be applied to the elastic portion 300 first, the elastic portion 300 will transmit the force to the opening mechanism 200 after deformation, F in the process of deformation of the elastic portion 300 4 The pointer 400 rotates relative to the dial 500, and the angle of rotation of the pointer 400 is the deformation angle of the elastic portion 300, and the elastic portion 300 can calculate F based on the elastic coefficient formula 4 And the indication of the dial 500 may be the value of the force after the conversion is complete; in addition, in order to avoid errors caused by the deformation of the elastic portion 300, the value of the dial 500 may be measured in a laboratory based on the elastic portion 300 to avoid errors.
The device for measuring intervertebral distraction force provided in this embodiment includes: the driving mechanism 100, the opening mechanism 200, the elastic part 300, the pointer 400 and the dial 500; the driving mechanism 100 is rotationally connected with the expanding mechanism 200, the driving mechanism 100 is connected with the dial 500 through the elastic part 300, the dial 500 is connected with the expanding mechanism 200, the dial 500 and the expanding mechanism 200 synchronously move, the pointer 400 is connected with the driving mechanism 100, and the pointer 400 and the driving mechanism 100 synchronously move; the opening mechanism 200 has a free state and a detection state, and in the free state, the opening mechanism 200 and the driving mechanism 100 synchronously move so that the elastic part 300 is in an unstressed state, and the pointer 400 can be positioned at the initial position of the dial 500; in the detection state of the expanding mechanism 200, one end of the expanding mechanism 200 away from the dial 500 is used for being placed at an intervertebral position, the driving mechanism 100 and the expanding mechanism 200 have relative motion under the action of intervertebral pressure, the elastic part 300 is in a stress state under the relative operation of the dial 500 and the driving mechanism 100, and the pointer 400 can rotate relative to the dial 500 so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism 100; the pressure of the intervertebral to the expanding mechanism 200 is fed back through the stress of the elastic part 300, and the stress of the elastic part 300 can be reflected through the rotation scale difference of the pointer 400 and the dial 500, so that the specific numerical indication of the intervertebral expanding force is realized, doctors can more intuitively judge the specific therapy required by patients, reliable basis is provided for formulating a unified operation strategy, different influences on the operation are avoided, and the technical problem that in the spinal fusion operation existing in the prior art, quantitative expanding data cannot be provided for doctors, and the operation failure is possibly caused because the fusion device is not fully expanded or excessively expanded is solved.
Further to the above embodiments, in the preferred embodiment of the present invention, the expanding mechanism 200 comprises an expanding rod 201 and an expanding housing 202; the opening shell 202 comprises a first end cover 212 and a second end cover 222 which are buckled in a sliding way, a containing space is formed between the first end cover 212 and the second end cover 222, one end of the opening rod 201 is of an elliptical structure 211, the elliptical structure 211 is located in the containing space, the opening rod 201 is connected with the driving mechanism 100, and the driving mechanism 100 is used for driving the elliptical structure 211 to rotate through the opening rod 201 so as to adjust the distance between the first end cover 212 and the second end cover 222 through the rotating position of the elliptical structure 211.
In this embodiment, the opening rod 201 is used as a driving transmission unit of the driving mechanism 100, the opening rod 201 can rotate relative to the opening housing 202 under the rotation acting force of the driving mechanism 100, meanwhile, the opening rod 201 is accommodated in the accommodating space of the opening housing 202 by using the elliptical structure 211, and when the elliptical structure 211 rotates, the first end cover 212 and the second end cover 222 can move in the direction of relatively separating and approaching, so that the adjustment of the space between the first end cover 212 and the second end cover 222 is ensured; the surfaces of the first end cover 212 and the second end cover 222 are identical to the shape of the test mold, that is, the first end cover 212 and the second end cover 222 can make simulated contact with two ends of the intervertebral space respectively.
In a preferred embodiment of the present invention, the elliptical structure 211 has a short axis spacing and a long axis spacing, the short axis spacing is the same as the inner wall spacing between the first end cap 212 and the second end cap 222 in the fastened state, and the long axis spacing is longer than the short axis spacing by a predetermined distance, wherein the first end cap 212 and the second end cap 222 are used for being placed at the intervertebral position, and the predetermined distance is a predetermined height of the first end cap 212 and the second end cap 222 for expanding the intervertebral space.
In this embodiment, the elliptical structures 211 are used as the rotating structures of the first end cover 212 and the second end cover 222 for expanding, the short axis distance H of the elliptical structures 211 can be selected for different test heights, that is, after the required implanted fusion device height is tested by driving the test die, the test die is pulled out, the elliptical structures 211 with matched heights are selected according to the heights, each elliptical structure 211 corresponds to the expanding shell 202 of one expanding mechanism 200, the long axis distance is h+h, the height H is the expanding height, and meanwhile, h+h is the test die height selected by doctors.
In the preferred embodiment of the present invention, the distraction mechanism 200 further includes a limiting mechanism 203; the limiting mechanism 203 is located between the first end cap 212 and the second end cap 222, and the limiting mechanism 203 is connected to the first end cap 212 and the second end cap 222, respectively, to limit the reciprocating movement of the first end cap 212 and the second end cap 222 in a relatively approaching or separating direction.
In this embodiment, the first end cover 212 and the second end cover 222 can only move linearly along the distance direction between the vertebrae during the opening process, in order to ensure the linear movement of the first end cover 212 and the second end cover 222, the limiting mechanism 203 is disposed between the first end cover 212 and the second end cover 222, so that the limiting mechanism 203 can limit five degrees of freedom of the first end cover 212 and the second end cover 222, and further limit the first end cover 212 and the second end cover 222 to move reciprocally only along the direction relatively approaching or separating.
In a preferred embodiment of the present invention, the limiting mechanism 203 includes a limiting post 213, a first limiting groove 223, a limiting clip groove 233, a limiting plate 243, and a second limiting groove 253; the limiting clamping groove 233 and the limiting column 213 are both arranged on the first end cover 212, the limiting clamping groove 233 is positioned on the inner wall of the first end cover 212, the supporting rod 201 is provided with an annular groove 221 corresponding to the limiting clamping groove 233, and the limiting clamping groove 233 can be clamped in the annular groove 221 so as to limit the supporting rod 201 in the axial direction; the first limiting groove 223 is arranged on the second end cover 222, the limiting column 213 and the first limiting groove 223 are both positioned in the accommodating space, and the limiting column 213 and the first limiting groove 223 are in plug-in fit; the limiting plates 243 are provided with a plurality of limiting plates 243 which are circumferentially spaced along the side wall of the first end cover 212, the second end cover 222 is provided with a plurality of second limiting grooves 253 corresponding to the limiting plates 243 at intervals, each limiting plate 243 can be matched with a corresponding one of the second limiting grooves 253, the limiting plates 243 are matched with the second limiting grooves 253 in a limiting manner, and the limiting columns 213 are matched with the first limiting grooves 223 in a limiting manner so as to jointly limit the first end cover 212 and the second end cover 222 to perform linear motion in a relatively approaching or separating direction.
In this embodiment, the annular groove 221 is formed between the limiting clamping groove 233 and the side wall of the opening shaft, the limiting clamping groove 233 and the annular groove 221 can keep the relative position between the opening housing 202 and the opening rod 201 unchanged, the first end cover 212 and the second end cover 222 are inserted into the first limiting post 213 and the first limiting groove 223, the limiting post 213 and the first limiting groove 223 can only make the first end cover 212 and the second end cover 222 move relatively in the axial direction of the limiting post 213 or swing relatively with the limiting post 213 as the shaft, on the basis, the limiting plate 243 and the second limiting groove 253 can limit the swinging movement direction, and further, as the limiting post 213, the first limiting groove 223, the limiting clamping groove 233, the limiting plate 243 and the second limiting groove 253 are respectively matched for use, five degrees of freedom are limited, and the degrees of freedom of the first end cover 212 and the second end cover 222 can only make the first end cover 212 and the second end cover 222 move linearly in the relatively approaching or separating direction, that is, the first end cover 212 and the second end cover 222 can only swing relatively in parallel, and the front and back are not staggered or swing.
In the preferred embodiment of the present invention, the expanding mechanism 200 further comprises a spring plate 204; the elastic piece 204 is fixedly connected with the inner walls of the first end cover 212 and the second end cover 222, respectively, and the elastic piece 204 has an elastic tendency to make the first end cover 212 and the second end cover 222 relatively close.
In this embodiment, the elastic sheet 204 is welded and fixed with the first end cover 212 and the second end cover 222 respectively, that is, the elastic sheet 204 is an opening force of the first end cover 212 and the second end cover 222 in a free state, and because the first end cover 212 and the second end cover 222 are welded with the two elastic sheets 204 respectively, the first end cover 212 and the second end cover 222 are pulled by the elastic sheet 204 after being spread, and are pulled back to a closed state by the two elastic sheets 204 after the spreading rod 201 rotates 90 degrees; the first end cap 212 and the second end cap 222 are contoured to conform to the contours of the test mold so as not to disrupt the original procedure.
In a preferred embodiment of the present invention, the drive mechanism 100 includes a force handle 101 and a drive sleeve 102; the force application handle 101 is connected with one end of the transmission sleeve 102, and the force application handle 101 can drive the transmission sleeve 102 to rotate; the transmission sleeve 102 is provided with a connecting channel, the expanding rod 201 stretches into the connecting channel, the expanding rod 201 is in threaded connection with the transmission sleeve 102, and the threaded connection force of the expanding rod 201 and the transmission sleeve 102 is matched with the acting force of the elastic sheet 204.
In this embodiment, the force application handle 101 may be a T-shaped handle, the force application handle 101 may drive the transmission sleeve 102 to axially rotate, the transmission sleeve 102 may be used as a penetrating space of the elastic portion 300 and the opening rod 201, one end of the elastic portion 300 is connected with the transmission sleeve 102, the other end of the elastic portion 300 is connected with the dial 500, the opening rod 201 may be connected with the transmission sleeve 102 in a threaded manner, the transmission sleeve 102 may be in a free state, and the force of the threaded connection is utilized to adapt to the deformation force of the elastic sheet 204, so that the transmission sleeve 102 and the dial 500 may not rotate in the free state of the opening rod 201.
In a preferred embodiment of the present invention, the expanding mechanism 200 further includes a first limiting pin 205, the expanding rod 201 penetrates through the dial 500, and the expanding rod 201 is in limiting connection with the dial 500 in the circumferential direction through the first limiting pin 205; the drive sleeve 102 includes a first sleeve 112, a second sleeve 122, a second stop pin, and a third stop pin 132; the first sleeve 112 is in butt joint with the second sleeve 122, the first sleeve 112 is in circumferential limit connection with the second sleeve 122 through a second limit pin, and one end, far away from the second sleeve 122, of the first sleeve 112 is in circumferential limit connection with the force application handle 101 through a third limit pin 132; the elastic part 300 comprises a torsion spring, the dial 500 and one end of the second sleeve 122 far away from the first sleeve 112 are correspondingly arranged, the pointer 400 is connected with the side wall of the second sleeve 122, the expanding rod 201 penetrates through the second sleeve 122 and is in threaded connection with the first sleeve 112, the torsion spring is sleeved outside the expanding rod 201, two ends of the torsion spring are respectively connected with the second sleeve 122 and the dial 500, the torsion spring can transmit acting force applied to the expanding rod 201 by the second sleeve 122 through the dial 500, and the range of expanding force applied to the vertebrae by the force application handle 101 is fed back through angular deflection of the torsion spring.
In this embodiment, since the expanding rod 201 penetrates through the dial 500, the dial 500 may be provided with a shaft sleeve corresponding to the expanding rod 201, and a first limiting pin 205 is provided along the sidewall of the shaft sleeve of the expanding rod 201 in a penetrating manner, that is, the expanding rod 201 and the dial 500 form a circumferential limiting fixation through the first limiting pin 205; the first sleeve 112 is in butt joint with the second sleeve 122, the first sleeve 112 can serve as a connecting structure of the second sleeve 122 and the force application handle 101, the first sleeve 112 can be in circumferential limit connection with the second sleeve 122 through the second limit pin, meanwhile, the expanding rod 201 can be in threaded connection with the position, close to the second sleeve 122, of the first sleeve 112 through threads, the second sleeve 122 serves as a containing structure of the torsion spring, one end of the torsion spring is fixedly inserted into the end portion of the second sleeve 122, the other end of the torsion spring is fixedly inserted into the dial 500, namely, when the force application handle 101 applies rotating acting force through the first sleeve 112, the expanding shell 202 is enabled to rotate relatively under the action of intervertebral pressure through threaded rotation, the second sleeve 122 can drive the torsion spring to rotate relative to the dial 500, and because the pointer 400 is connected with the outer side wall of the second sleeve 122, namely, the pointer 400 can rotate along the surface of the dial 500.
In the preferred embodiment of the present invention, there is also included a stationary handle 600 and an outer sleeve 700; the outer sleeve 700 is sleeved outside the opening rod 201, and the fixed handle 600 is fixedly connected with the outer sleeve 700.
In a preferred embodiment of the present invention, fluid passing holes 701 are formed through the outer sleeve 700 at intervals along the sidewall thereof.
In this embodiment, in the actual measurement process, one hand holds the fixed handle 600 to keep the outer sleeve 700 still, and the other hand rotates the force application handle 101, and torque is transmitted to the opening rod 201 through the torsion spring, and through the uniformly distributed waist holes on the outer sleeve 700, the liquid can flow to the opening rod 201 and the intervertebral space conveniently, and is sterilized and cleaned.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A device for measuring intervertebral distraction force, comprising: a driving mechanism (100), a spreading mechanism (200), an elastic part (300), a pointer (400) and a dial (500);
the driving mechanism (100) is rotationally connected with the opening mechanism (200), the driving mechanism (100) is connected with the dial (500) through the elastic part (300), the dial (500) is connected with the opening mechanism (200), the dial (500) and the opening mechanism (200) synchronously move, the pointer (400) is connected with the driving mechanism (100), and the pointer (400) and the driving mechanism (100) synchronously move;
the expanding mechanism (200) has a free state and a detection state, the driving mechanism (100) and the expanding mechanism (200) synchronously move in the free state of the expanding mechanism (200) so that the elastic part (300) is in an unstressed state, and the pointer (400) can be positioned at the initial position of the dial (500); under the detection state, one end of the expanding mechanism (200) away from the dial (500) is used for being placed at an intervertebral position, the expanding mechanism (200) is under the action of intervertebral pressure, the driving mechanism (100) and the expanding mechanism (200) have relative motions, the elastic part (300) is in a stressed state under the relative operation of the dial (500) and the driving mechanism (100), and the pointer (400) can rotate relative to the dial (500) so as to feed back the numerical value of the intervertebral expanding force applied by the driving mechanism (100).
2. The device for measuring intervertebral distraction force according to claim 1, wherein said distraction mechanism (200) comprises a distraction rod (201) and a distraction housing (202);
the utility model provides a strut casing (202) is including first end cover (212) and second end cover (222) of relative slip lock, first end cover (212) with have accommodation space between second end cover (222), the one end of strut pole (201) is oval structure (211), oval structure (211) are located in the accommodation space, strut pole (201) with actuating mechanism (100) are connected, actuating mechanism (100) are used for through strut pole (201) drive oval structure (211) rotate, in order to pass through the rotation position of oval structure (211) is adjusted interval between first end cover (212) and second end cover (222).
3. The device for measuring intervertebral distraction force according to claim 2, wherein said oval structure (211) has a short axis spacing identical to an inner wall spacing of a snap-fit condition between said first end cap (212) and said second end cap (222) and a long axis spacing elongated by a preset distance from said short axis spacing, wherein said first end cap (212) and said second end cap (222) are adapted to be placed at an intervertebral position, said preset distance being a preset height of said first end cap (212) and said second end cap (222) for intervertebral distraction.
4. The device for measuring intervertebral distraction force according to claim 3, wherein said distraction mechanism (200) further comprises a limiting mechanism (203);
the limiting mechanism (203) is located between the first end cover (212) and the second end cover (222), and the limiting mechanism (203) is connected with the first end cover (212) and the second end cover (222) respectively so as to limit the first end cover (212) and the second end cover (222) to reciprocate along a relatively approaching or separating direction.
5. The device for measuring intervertebral distraction force according to claim 4, wherein said limiting mechanism (203) comprises a limiting post (213), a first limiting groove (223), a limiting clip groove (233), a limiting plate (243) and a second limiting groove (253);
the limiting clamp groove (233) and the limiting column (213) are both arranged on the first end cover (212), the limiting clamp groove (233) is positioned on the inner wall of the first end cover (212), the supporting rod (201) is provided with an annular groove (221) corresponding to the limiting clamp groove (233), and the limiting clamp groove (233) can be clamped in the annular groove (221) so as to limit the supporting rod (201) in the axial direction;
the first limit groove (223) is arranged on the second end cover (222), the limit column (213) and the first limit groove (223) are both positioned in the accommodating space, and the limit column (213) and the first limit groove (223) are in plug-in fit;
the limiting plates (243) are arranged in a plurality, the limiting plates (243) are circumferentially arranged at intervals along the side wall of the first end cover (212), the second end cover (222) is correspondingly provided with a plurality of second limiting grooves (253) at intervals, each limiting plate (243) can be matched with a corresponding second limiting groove (253), the limiting plates (243) are matched with the second limiting grooves (253) in a limiting mode, and the limiting columns (213) are matched with the first limiting grooves (223) in a limiting mode to jointly limit the first end cover (212) and the second end cover (222) to conduct linear motion in a relatively approaching or separating direction.
6. The device for measuring intervertebral distraction force according to claim 2, wherein said distraction mechanism (200) further comprises a shrapnel (204);
the elastic piece (204) is fixedly connected with the inner walls of the first end cover (212) and the second end cover (222) respectively, and the elastic piece (204) has an elastic trend that the first end cover (212) and the second end cover (222) are relatively close.
7. The device for measuring intervertebral distraction force according to claim 6, wherein said driving mechanism (100) comprises a force application handle (101) and a transmission sleeve (102);
the force application handle (101) is connected with one end of the transmission sleeve (102), and the force application handle (101) can drive the transmission sleeve (102) to rotate;
the transmission sleeve (102) is provided with a connecting channel, the opening rod (201) extends into the connecting channel, the opening rod (201) is in threaded connection with the transmission sleeve (102), and the threaded connection force of the opening rod (201) and the transmission sleeve (102) is matched with the acting force of the elastic sheet (204).
8. The device for measuring intervertebral distraction force according to claim 7, wherein said distraction mechanism (200) further comprises a first limiting pin (205), said distraction rod (201) extending through said dial (500), and said distraction rod (201) being in a circumferential limiting connection with said dial (500) by means of said first limiting pin (205);
the transmission sleeve (102) comprises a first sleeve (112), a second sleeve (122), a second limiting pin and a third limiting pin (132); the first sleeve (112) is in butt joint with the second sleeve (122), the first sleeve (112) is in circumferential limit connection with the second sleeve (122) through the second limiting pin, and one end, far away from the second sleeve (122), of the first sleeve (112) is in circumferential limit connection with the force application handle (101) through the third limiting pin (132);
the elastic part (300) comprises a torsion spring, the dial (500) is correspondingly arranged with one end of the second sleeve (122) away from the first sleeve (112), the pointer (400) is connected with the side wall of the second sleeve (122), the expanding rod (201) penetrates through the second sleeve (122) and is in threaded connection with the first sleeve (112), the torsion spring is sleeved outside the expanding rod (201), two ends of the torsion spring are respectively connected with the second sleeve (122) and the dial (500), the torsion spring can transmit acting force applied by the second sleeve (122) to the expanding rod (201) through the dial (500), and the range of the expanding force applied by the force applying handle (101) to the intervertebral is deflected through the angle of the torsion spring.
9. The device for measuring intervertebral distraction force according to any one of claims 2-8, further comprising a fixed handle (600) and an outer sleeve (700);
the outer sleeve (700) is sleeved outside the opening rod (201), and the fixed handle (600) is fixedly connected with the outer sleeve (700).
10. The device for measuring intervertebral distraction force according to claim 9, wherein fluid passing holes (701) are provided through the outer sleeve (700) at intervals along the side wall thereof.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311047931.2A CN117064600B (en) | 2023-08-18 | 2023-08-18 | Device for measuring intervertebral distraction force |
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| CN202311047931.2A CN117064600B (en) | 2023-08-18 | 2023-08-18 | Device for measuring intervertebral distraction force |
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| CN118557341A (en) * | 2024-05-28 | 2024-08-30 | 上海三友医疗器械股份有限公司 | Pull-out force testing device for intervertebral fusion devices |
| CN119837572A (en) * | 2025-03-07 | 2025-04-18 | 上海锐植医疗器械有限公司 | Medical counter device and method of use |
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| CN117064600B (en) | 2024-05-07 |
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