CN109009477B - Femur measuring device - Google Patents
Femur measuring device Download PDFInfo
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- CN109009477B CN109009477B CN201811018543.0A CN201811018543A CN109009477B CN 109009477 B CN109009477 B CN 109009477B CN 201811018543 A CN201811018543 A CN 201811018543A CN 109009477 B CN109009477 B CN 109009477B
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- 210000000689 upper leg Anatomy 0.000 title claims abstract description 70
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 239000000523 sample Substances 0.000 claims description 55
- 238000005259 measurement Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 230000009194 climbing Effects 0.000 claims description 10
- 230000001054 cortical effect Effects 0.000 claims description 9
- 238000004513 sizing Methods 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 4
- 210000000988 bone and bone Anatomy 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 210000000629 knee joint Anatomy 0.000 description 3
- 238000013150 knee replacement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011883 total knee arthroplasty Methods 0.000 description 3
- 210000002414 leg Anatomy 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000012659 Joint disease Diseases 0.000 description 1
- 206010060820 Joint injury Diseases 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000000501 femur body Anatomy 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1732—Guides or aligning means for drills, mills, pins or wires for bone breaking devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
-
- 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
- A61B90/10—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 for stereotaxic surgery, e.g. frame-based stereotaxis
- A61B90/11—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 for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints
-
- 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
- A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Pathology (AREA)
- Dentistry (AREA)
- Surgical Instruments (AREA)
Abstract
The present application relates to a femur measuring apparatus. The femur measuring device comprises a main body for measuring the femur size, a scale plate rotatably connected with the main body and a locking mechanism connected with the main body. The scale plate is provided with a rotation center, a first positioning hole and a second positioning hole are formed in the scale plate, and the relative distance between the first positioning hole and the second positioning hole and the rotation center is fixed. The locking mechanism can be clamped with the scale plate to fix the rotation angle of the scale plate. According to the femur measuring device, the distances from the rotation center to the first positioning hole and the second positioning hole are kept fixed, so that the positioning deviation of the positioning holes caused by the fact that the distances from the rotation center to the positioning holes are changed along with the change of the femur size in the prior art is eliminated, and bone cutting and false installation caused by the deviation of the positioning holes are avoided.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a femur measuring device.
Background
The total knee arthroplasty is one of effective treatment operations for treating knee joint injuries and diseases, and the operation is to perform corresponding osteotomies on affected parts of knee joint patients of patients and implant artificial joint prostheses to replace original knee joints, so that the aims of recovering joint functions and relieving pain are achieved. Thus, an accurate osteotomy is required during the performance of a total knee arthroplasty to accommodate the installation of the prosthesis. Specifically, the femoral prosthesis is provided in a series of standard sizes, the total knee arthroplasty determines the corresponding prosthesis size by measuring the distance from the posterior femoral condyle to the anterior femoral cortex through a femoral sizing guide, then determines an external rotation angle based on the anatomical features of the femur, and aligns the positioning holes by rotating the femoral sizing guide to determine the subsequent osteotomy position.
Proper selection of the size of the prosthesis and proper positioning of the prosthesis relative to the natural bone are of great significance to ensure natural movement of the assembled joint and balance of surrounding soft tissue. However, the bone size and shape of different patients are different, and the external rotation angle required for aligning the positioning holes is also different, so that the femur size measurement guide plate needs to ensure accurate measurement of femur size, and allows a doctor to select a proper rotation positioning angle according to the requirements of different patients, thereby cutting bones and placing femur prostheses more accurately.
Disclosure of Invention
In view of the above, it is necessary to provide a femur measuring apparatus.
A femoral measurement device comprising:
a body for determining a femur size;
the scale plate is provided with a rotation center, the scale plate is rotatably connected with the main body through the rotation center, a first positioning hole and a second positioning hole are formed in the scale plate, and the relative distance between the first positioning hole and the second positioning hole and the rotation center is fixed; the method comprises the steps of,
and the locking mechanism is connected with the main body and can be clamped with the scale plate so as to fix the rotation angle of the scale plate.
According to the femur measuring device, the distances from the rotation center to the first positioning hole and the second positioning hole are kept fixed, so that the positioning deviation of the positioning holes caused by the fact that the distances from the rotation center to the positioning holes are changed along with the change of the femur size in the prior art is eliminated, and bone cutting and false installation caused by the deviation of the positioning holes are avoided.
In one embodiment, the scale plate is provided with a first rotating shaft hole, the main body is provided with a second rotating shaft hole, the first rotating shaft hole is communicated with the second rotating shaft hole, a rotating shaft is arranged in the first rotating shaft hole and the second rotating shaft hole in a penetrating mode, and the rotating shaft is the rotating center.
In one embodiment, the scale plate is provided with a plurality of angle scales for measuring the rotation angle of the scale plate, the scale plate is also provided with a plurality of clamping grooves, each clamping groove corresponds to one angle scale, and the locking mechanism is provided with a clamping tooth which can be clamped with the clamping groove so as to fix the rotation angle of the scale plate.
In one embodiment, the locking mechanism comprises:
the locking key is provided with the latch at one end;
the elastic piece is arranged at the other end of the locking key, two ends of the elastic piece are respectively connected with the elastic piece and the main body,
the limiting pin is arranged between the latch and the elastic piece and is used for connecting the locking key to the main body, and the locking key can rotate around the limiting pin so as to enable the latch to be clamped with or separated from the clamping groove.
In one embodiment, the body comprises:
the guide plate is used for being abutted against the section of the distal end of the femur, and a guide chute is formed in the guide plate;
the probe assembly is arranged at one end of the guide plate and is used for abutting against a cortical climbing point at the front side of the femur;
the back condyle baffle, set up in the other end of baffle, the back condyle baffle includes stabilizer blade and the stand that sets up perpendicularly, the stabilizer blade is used for the butt femur back condyle high point, the stand with lead spout sliding fit, so that the back condyle baffle can be close to or keep away from the motion of probe subassembly, be provided with on the stand and be used for the measurement the multichannel scale mark of femur size, the femur size is the distance of femur front side cortex climbing point to femur back condyle high point.
In one embodiment, the guide plate is further provided with a first through groove penetrating through the guide groove, and a datum line matched with the scale mark is arranged beside the first through groove.
In one embodiment, the number of the guide grooves is two, the two guide grooves are respectively arranged on the left side and the right side of the guide plate, the number of the stand columns is also two, and the two stand columns are respectively arranged in the two guide grooves in a penetrating manner.
In one embodiment, the post is provided with a locking hole, and a fastener for locking the posterior condylar baffle to the guide plate is inserted into the locking hole.
In one embodiment, the probe assembly comprises a probe and a probe seat, a probe hole is formed in the probe seat, the probe penetrates through the probe hole, and the probe seat is rotatably connected with one end of the guide plate.
In one embodiment, a probe seat hole is formed in one end of the guide plate, the probe seat is arranged in the probe seat hole, an annular groove is formed in the probe seat, a pin hole is further formed in the guide plate, the pin hole is communicated with the probe seat hole, a limiting piece is arranged in the pin hole in a penetrating mode, and the limiting piece is clamped with the annular groove to limit the probe seat up and down.
The femur measuring device provided by the application gives more choices to doctors on the rotation positioning of the prosthesis, and allows the doctors to flexibly adjust the external rotation angle, so that the femur measuring device can more accurately cut bones and place femur prostheses. Furthermore, the femur measuring device provided by the application enables the distance between the rotation center and the first positioning hole and the distance between the rotation center and the second positioning hole to be kept relatively fixed, namely, when the main body of the femur measuring device is stretched or contracted, the rotation center moves along with the first positioning hole and the second positioning hole, so that the problem of osteotomy positioning deviation caused by the change of the distance between the first positioning hole and the second positioning hole to the rotation center is avoided, osteotomy and prosthesis installation errors caused by the positioning deviation are further avoided, and postoperative complications of total knee replacement surgery are reduced. Furthermore, the femur measuring device provided by the application has a simple structure, simplifies the design structure and the use mode of external rotation angle adjustment, and can solve the problem that a screw thread screwing structure or a small latch for fixing the external rotation angle in the traditional femur measuring device is easy to wear and lose efficacy in the long-term use process.
Drawings
FIG. 1 is an exploded view of the structure of a femoral component measurement device of an embodiment;
FIG. 2 is a schematic illustration of the external rotation angle adjustment of the femoral measurement device shown in FIG. 1;
fig. 3 is a cross-sectional view of the femoral component shown in fig. 2, taken along section B-B.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the application, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-3, an embodiment of the present application provides a femoral sizing device 100 for sizing a femur and locating a pilot hole in a total knee replacement procedure. Specifically, the femoral measurement device 100 includes a main body 110, a scale plate 120, and a locking mechanism 130. The main body 110 is used for determining the size of the femur 200, that is, for measuring the distance AP from the anterior cortical climbing point 210 to the posterior condyle high point 220 of the femur, and further determining the size of the corresponding prosthesis.
The scale plate 120 is used to locate the locating hole to determine the subsequent osteotomy position and rotational positioning of the prosthesis relative to the natural bone. Specifically, the scale plate 120 has a rotation center 1201, and the scale plate 120 is rotatably connected to the main body 110 through the rotation center 1201. The scale plate 120 is provided with a first positioning hole 122 and a second positioning hole 123, so that a doctor can drive the first positioning hole 122 and the second positioning hole 123 to deflect by a certain external rotation angle through rotating the scale plate 120, the central connecting line of the first positioning hole 122 and the second positioning hole 123 is perpendicular to the Whiteside' line of the femur, namely the connecting line of the lowest point of the pulley and the highest point of the intercondylar fossa, and then the positions of the first positioning hole 122 and the second positioning hole 123 are determined. Further, the relative distances of the first positioning hole 122 and the second positioning hole 123 to the rotation center 1201 are fixed, that is, the relative distances of the first positioning hole 122 and the second positioning hole 123 to the rotation center 1201 remain unchanged regardless of the change in the size of the femur, thereby reducing positioning errors.
The locking mechanism 130 is connected with the main body 110, and the locking mechanism 130 can be clamped with the scale plate 120 to fix the rotation angle of the scale plate 120, so that a doctor can conveniently punch positioning nails in the first positioning hole 122 and the second positioning hole 123.
The above-mentioned femur measuring apparatus 100 is provided with a freely rotatable scale plate 120 on a main plate 110 for measuring the femur size, and the scale plate has a first positioning hole 122 and a second positioning hole 123. In the traditional femur measuring device, the adjustment of the external rotation angle is realized by providing a plurality of groups of positioning nail holes, namely, in the traditional scheme, by providing a plurality of groups of positioning nail holes with different angles, a doctor selects the most suitable positioning nail hole group from a plurality of groups of fixed positioning nail hole angles according to the requirement of a patient so as to determine the rotation positioning of the prosthesis, the adjustment range of the external rotation angle is smaller in such a scheme, the size of the nail hole is blocked, the angle of the interval of each group of positioning nail holes is larger, and the accurate adjustment and positioning are difficult to realize. The femoral component 100 according to the embodiment of the present application can freely adjust the external rotation angle by rotating the scale plate 120, so as to provide the doctor with more external rotation angle selections, thereby determining the most accurate positions of the first positioning hole 122 and the second positioning hole 123. Further, in some other conventional femoral measurement devices, the center of rotation is often fixed somewhere, but the distance from the pilot pin hole to the fixed center of rotation increases from small to large, so that in different femoral sizes, even if the pilot pin hole swings the same angle around the center of rotation, osteotomy positioning deviations are introduced. In the solution of the present application, the distance between the first positioning hole 122 and the second positioning hole 123 of the bone measuring device 100 and the rotation center is always fixed, so that the positioning deviation of the positioning holes during the external rotation angle adjustment caused by the change of the femur size is avoided, and the osteotomy and the prosthesis installation error caused by the positioning hole deviation are avoided.
Specifically, in one of the embodiments, the scale plate 120 is provided with a first rotation shaft hole 121, the body 110 is provided with a second rotation shaft hole 1111, and the first rotation shaft hole 121 communicates with the second rotation shaft hole 1111. The rotation shaft 124 is inserted into the first rotation shaft hole 121 and the second rotation shaft hole 1111, and the scale plate 120 is rotatable with respect to the main body 110 about the rotation shaft 124. Further, the rotation shaft 124 is fixedly coupled to the body 110 by screw threads, welding, or other means.
Further, the first positioning hole 122 and the second positioning hole 123 are symmetrically disposed at the left and right sides of the first rotation shaft hole 121. Specifically, in one of the embodiments, the centers of the first positioning hole 122, the second positioning hole 123, and the first rotation shaft hole 121 are located on the same straight line. Further, the scale plate 120 is further provided with a reference line 128, and the reference line 128 is overlapped with the central line of the first positioning hole 122 and the second positioning hole 123, so that a doctor can conveniently observe whether the central line of the first positioning hole 122 and the second positioning hole 123 is perpendicular to the Whiteside's line of the femur 200 after the scale plate 120 rotates by a certain external rotation angle. Specifically, the reference line 128 may be engraved or printed on the scale plate 120.
Further, the scale plate 120 is provided with a first hollow window 125, the main body 110 is provided with a second hollow window 1112, and the first hollow window 125 is communicated with the second hollow window 1112, so that a Whiteside's line of the femur 200 can be directly observed through the first hollow window 125 and the second hollow window 1112.
Specifically, in one embodiment, the scale plate 120 is further provided with a first protrusion 1261 and a second protrusion 1262, and after the scale plate 120 is connected to the main body 110, the main body 110 is located between the first protrusion 1261 and the second protrusion 1262, so as to play a role in limiting the scale plate 120 left and right, and prevent the rotation amplitude of the scale plate 120 from being too large. Further, the first positioning hole 122 penetrates the first protrusion 1261, and the second positioning hole 123 penetrates the second protrusion 1262. The first protrusion 1262 can lengthen the first positioning hole 122 and the second protrusion 1262 can lengthen the second positioning hole 123. Thus, when the positioning nail is punched to the femur 200 through the first positioning hole 122 and the second positioning hole 123, the first positioning hole 122 and the second positioning hole 123 play a guiding role, and the lengthened first positioning hole 122 and the second positioning hole 123 can effectively prevent the positioning nail from deviating from the track.
Specifically, the scale plate 120 is further provided with a plurality of angle scales 1272, and the angle scales 1272 are used for measuring the rotation angle of the scale plate 120, that is, the external rotation angle rotated by the central connecting line of the first positioning hole 122 and the second positioning hole 123. Further, each rotation has an angle scale 1272 corresponding to the rotation angle, so that the doctor can record conveniently. Furthermore, before the total knee replacement operation, a doctor can pre-determine the external rotation angle required to rotate the positioning hole of the patient through the medical image and based on the anatomical feature of the femur, during the operation, the scale plate 120 is directly rotated to the preset external rotation angle through the angle scale 1272, and fine adjustment is performed on the basis of the external rotation angle, so that the doctor is prevented from judging whether the first positioning hole 122 and the second positioning hole 123 are positioned only by observing the Whiteside's line of the femur 200, the positioning reliability is improved, and the operation difficulty is reduced.
Further, the scale plate 120 is further provided with a plurality of slots 1271, and each slot 1271 corresponds to an angle scale 1272. Specifically, the locking mechanism 130 is provided with a latch 1311, and the latch 1311 can be engaged with the latch 1271, so as to fix the rotation angle of the scale plate 120. Further, the straight line of the extending direction of the plurality of slots 1271 converges at the rotation center 1201 of the scale plate 120.
Specifically, in one embodiment, the locking mechanism 130 includes a locking key 131, an elastic member 132, and a limiting pin 133. The latch 1311 is disposed at one end of the locking key 131, the elastic member 132 is disposed at the other end of the locking key, and two ends of the elastic member 132 are respectively connected to the locking key 131 and the main body 110. Specifically, the locking key 131 is provided with a first counter bore 1312, the main body 110 is provided with a second counter bore 1113, and the first counter bore 1312 and the second counter bore 1312 are disposed opposite to each other, so that the first counter bore 1312 and the second counter bore 1312 can together form a cavity, and the elastic member 132 is disposed in the cavity. Further, the elastic member 132 is a spring.
The limiting pin 133 is disposed between the latch 1311 and the elastic member 132 for connecting the locking key 131 to the main body 110. Specifically, a first pin hole 1331 is provided in the middle of the locking key 131, second pin holes 1114 are provided on two side walls of the second hollow window 1112 of the main body 110, the limiting pin 133 is inserted into the first pin hole 1331, and two ends of the limiting pin 133 are fixedly arranged in the second pin holes 1114 through interference fit, welding or other manners, so that the locking key 131 can rotate around the limiting pin 133. Further, the locking key 131 has a pressing surface 1313, the pressing surface 1313 corresponds to the elastic member 132, and pressing the pressing surface 1313 on the locking key 131 can compress the elastic member 132, and the latch 1311 is separated from the slot 1271 by the leverage of the limiting pin 133, so as to unlock the locking function. The pressing surface 1313 is released, the elastic member 132 returns due to elastic force, and the latch 1311 is again engaged with the slot 1271 by leverage.
It should be noted that, the scale plate 120 may be locked by other manners, for example, in another embodiment, a first through hole is formed in the scale plate 120, a plurality of second through holes corresponding to the rotation angle of the scale plate 120 are formed in the main body 110, and the rotation angle of the scale plate 120 is fixed by penetrating a connecting piece, such as a pin, into the first through hole and a certain second through hole.
Specifically, in one embodiment, the measurement of the size of the femur uses an anterior reference approach, i.e., the distance H from the first positioning hole 122 or the second positioning hole 123 to the anterior cortical climbing point 210 of the femur is the same for different sized femurs. Specifically, the body 110 includes a guide plate 111, a posterior condylar baffle 112, and a probe assembly 113. Wherein the guide 111 is adapted to abut against a cut surface of the distal femur, i.e. the end of the femur 200 remote from the heart. The scale plate 120 is rotatably provided on the guide plate 111 by a rotation shaft 124. The probe assembly 113 is disposed at one end of the guide plate 111 for abutting against the anterior cortical climbing point 210 of the femur. The vertical distance from the anterior cortical rim point 210 to the axis of rotation 124 remains constant throughout. The posterior condylar baffle 112 is disposed at the other end of the guide plate 111, and the posterior condylar baffle 112 includes a post 1121 and a foot 1122, the foot 1122 for abutment against the femoral posterior condylar high point 220. Specifically, the guide plate 111 is provided with a guide chute 1115, and the upright post 1121 is inserted into the guide chute 1115, so that the upright post 1121 is slidably matched with the guide chute 1115, and further, the posterior condylar baffle 112 can move close to or far away from the probe assembly 1113, so as to measure the size of the femur 200, that is, the distance AP from the anterior cortical climbing point 210 of the femur to the posterior condylar high point 220 of the femur.
Further, a plurality of graduation marks 1124 are provided on post 1121 for measuring femur size. Furthermore, the guide plate 111 is further provided with a first through groove 1116 penetrating the guide groove 1115, and the graduation marks 1124 on the upright 1121 can be directly observed through the first through groove 1116. And a reference line 1119 matched with the graduation line 1124 is arranged beside the first through groove 1116, so that the corresponding numerical value of the graduation line 1124 is read through the relative position of the reference line 1119 and the graduation line 1124, and the size of the femur 200 is obtained.
Specifically, in one embodiment, two guide grooves 1115 are provided, two guide grooves 1115 are respectively disposed on the left side and the right side of the guide plate 111, two upright posts 1121 are also provided, and two upright posts 1121 are respectively inserted into the two guide grooves 1115, so that the back condyle baffle 112 is prevented from shaking left and right in the sliding process, and the stability in the measuring process is improved. Correspondingly, the number of the two legs 1122 of the posterior condylar baffle 112 is also two, and the two legs 1122 respectively abut against the two femoral posterior condylar high points 220.
Specifically, a locking hole 1125 is provided on the upright 1121 of the back condyle baffle 112, and a fastener 140 is provided in the locking hole 1125 in a penetrating manner, so that after the back condyle baffle 112 is adjusted, the back condyle baffle 112 is locked on the guide plate, so as to conveniently read the numerical value on the scale line 1124. Specifically, the locking hole 1125 is a threaded hole, and the fastener 140 includes a fastening bolt and a knob, and by rotating the knob, the fastening bolt can be made to press against the guide plate 111, thereby locking the posterior condylar-baffle 112.
Further, the posterior condylar baffle 112 is further provided with a handle hole 1123, specifically, threads are provided in the handle hole 1123, so as to cooperate with various threaded handles to facilitate grasping or assisting in fixing the femoral measurement device 100 by a doctor.
Specifically, in one embodiment, the probe assembly 113 includes a probe 1131 and a probe mount 1132. Wherein, one end of probe 1131 is used to abut on anterior cortical climbing point 210 of femur. The probe seat 1132 is provided with a probe hole 1133, and the probe 1131 is penetrated in the probe hole 1133, so that the probe 1131 can move back and forth. Further, the probe seat 1132 is rotatably connected with one end of the guide plate 111, so that the probe 1131 can rotate circumferentially, and further, for the femur of different patients, the anterior cortical climbing point 210 of the femur can be accurately found by adjusting the anterior-posterior and circumferential positions of the probe 1131.
Specifically, one end of the guide plate 111 is provided with a probe seat hole 1117, and the probe seat 1132 is disposed in the probe seat hole 1117, so that the probe seat 1132 can drive the probe 1131 to rotate circumferentially. Further, the probe seat 1132 is provided with a ring groove 1134, the guide plate 1111 is provided with a pin hole 1118, the pin hole 1118 is communicated with the probe seat hole 1117, a limiting piece (not shown) is arranged in the pin hole 1118 in a penetrating manner, and the limiting piece penetrates the pin hole 1118 and is clamped with the ring groove 1134, so that the probe seat 1132 is limited up and down.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A femoral measurement device comprising:
a body for determining a femur size;
the scale plate is provided with a rotation center, the scale plate is rotatably connected with the main body through the rotation center, a first positioning hole and a second positioning hole are formed in the scale plate, the relative distance between the first positioning hole and the second positioning hole and the rotation center is fixed, the first positioning hole and the second positioning hole are symmetrically arranged on two sides of the rotation center, and the centers of the first positioning hole, the second positioning hole and the rotation center are positioned on the same straight line;
the locking mechanism is connected with the main body and can be clamped with the scale plate so as to fix the rotation angle of the scale plate.
2. The femur measuring apparatus according to claim 1, wherein the scale plate is provided with a first rotation shaft hole, the main body is provided with a second rotation shaft hole, the first rotation shaft hole is communicated with the second rotation shaft hole, and a rotation shaft is inserted into the first rotation shaft hole and the second rotation shaft hole, and the rotation shaft is the rotation center.
3. The femur measuring device according to claim 1, wherein a plurality of angle scales for measuring the rotation angle of the scale plate are provided on the scale plate, a plurality of clamping grooves are further provided on the scale plate, each clamping groove corresponds to one of the angle scales, and a latch is provided on the locking mechanism, and the latch can be clamped with the clamping groove to fix the rotation angle of the scale plate.
4. The femoral measurement device of claim 3, wherein the locking mechanism comprises:
the locking key is provided with the latch at one end;
the elastic piece is arranged at the other end of the locking key, and two ends of the elastic piece are respectively connected with the elastic piece and the main body;
the limiting pin is arranged between the latch and the elastic piece and is used for connecting the locking key to the main body, and the locking key can rotate around the limiting pin so as to enable the latch to be clamped with or separated from the clamping groove.
5. The femoral measurement device of claim 1, wherein the body comprises:
the guide plate is used for being abutted against the section of the distal end of the femur, and a guide chute is formed in the guide plate;
the probe assembly is arranged at one end of the guide plate and is used for being abutted on a cortical climbing point at the front side of the femur;
the back condyle baffle, set up in the other end of baffle, back condyle baffle includes stabilizer blade and the stand that sets up perpendicularly, the stabilizer blade is used for the butt on the high point of femur back condyle, the stand with lead spout sliding fit, so that back condyle baffle can be close to or keep away from probe assembly's motion, be provided with on the stand and be used for the measurement the multichannel scale mark of femur size, the femur size is the distance of femur front side cortex climbing point to the high point of femur back condyle.
6. The femur measuring apparatus according to claim 5, wherein the guide plate is further provided with a first through groove penetrating the guide groove, and a reference line matching with the scale line is provided beside the first through groove.
7. The femur measuring device according to claim 5, wherein the number of the guide grooves is two, the two guide grooves are respectively arranged on the left side and the right side of the guide plate, the number of the upright posts is also two, and the two upright posts are respectively arranged in the two guide grooves in a penetrating manner.
8. The femoral sizing device of claim 5 or 7, wherein the post is provided with a locking hole, the locking hole being internally threaded with a fastener for locking the posterior condylar baffle to the guide plate.
9. The femoral measurement device of claim 5, wherein the probe assembly comprises a probe and a probe holder, the probe holder having a probe aperture therein, the probe being disposed through the probe aperture, the probe holder being rotatably coupled to one end of the guide plate.
10. The femur measuring device according to claim 9, wherein a probe seat hole is formed in one end of the guide plate, the probe seat is disposed in the probe seat hole, a ring groove is formed in the probe seat, a pin hole is further formed in the guide plate, the pin hole is communicated with the probe seat hole, a limiting piece is arranged in the pin hole in a penetrating manner, and the limiting piece is clamped with the ring groove to limit the probe seat up and down.
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| CN201811018543.0A CN109009477B (en) | 2018-09-03 | 2018-09-03 | Femur measuring device |
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| CN201811018543.0A CN109009477B (en) | 2018-09-03 | 2018-09-03 | Femur measuring device |
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| CN109009477B true CN109009477B (en) | 2023-10-31 |
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| CN109846557B (en) * | 2019-01-24 | 2021-05-04 | 北京积水潭医院 | Be arranged in distal bone of thighbone tumour art to cut bone length measuring tool |
| CN109700498B (en) * | 2019-01-31 | 2024-03-26 | 中南大学湘雅医院 | Tibia proximal osteotomy device |
| CN111407471A (en) * | 2020-03-26 | 2020-07-14 | 北京力达康科技有限公司 | Thighbone measuring device |
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| CN101884560A (en) * | 2010-06-04 | 2010-11-17 | 王岩 | Universal-type femur external rotation osteotomy guider |
| CN103002817A (en) * | 2010-05-11 | 2013-03-27 | 德普伊(爱尔兰)有限公司 | A femoral sizing guide |
| WO2013068720A1 (en) * | 2011-11-11 | 2013-05-16 | Depuy (Ireland) | A bone sizing guide |
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| CN108403120A (en) * | 2017-02-10 | 2018-08-17 | 北京纳通医学科技研究院有限公司 | Femur outward turning locator |
| CN209236393U (en) * | 2018-09-03 | 2019-08-13 | 苏州微创关节医疗科技有限公司 | Femur measurement device |
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|---|---|---|---|---|
| TWM495826U (en) * | 2014-09-25 | 2015-02-21 | United Orthopedic Corp | Femur resection gauge |
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| CN103002817A (en) * | 2010-05-11 | 2013-03-27 | 德普伊(爱尔兰)有限公司 | A femoral sizing guide |
| CN101884560A (en) * | 2010-06-04 | 2010-11-17 | 王岩 | Universal-type femur external rotation osteotomy guider |
| WO2013068720A1 (en) * | 2011-11-11 | 2013-05-16 | Depuy (Ireland) | A bone sizing guide |
| CN204410819U (en) * | 2015-01-04 | 2015-06-24 | 北京纳通科技集团有限公司 | Femoral sizing guiding device |
| CN108403120A (en) * | 2017-02-10 | 2018-08-17 | 北京纳通医学科技研究院有限公司 | Femur outward turning locator |
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