CN212522098U

CN212522098U - Thighbone measuring device

Info

Publication number: CN212522098U
Application number: CN202020407433.XU
Authority: CN
Inventors: 李建东; 贾京亮; 王东林
Original assignee: Beijing Lidakang Technology Co Ltd
Current assignee: Beijing Lidakang Technology Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-02-12
Anticipated expiration: 2030-03-26

Abstract

The utility model provides a femur measuring device, which comprises a body, wherein a positioning plate is arranged at the bottom of the body, a slide bar which can move up and down and rotate left and right is inserted into the top of the body, a probe which can move along the top of the slide bar is inserted into the top of the slide bar, a first specification scale mark is arranged on the probe, and a second scale mark is arranged on the front side of the body; the rear side of the body is provided with an outward rotating plate, the front side of the body is provided with a knob which can drive the outward rotating plate to rotate, and the front side of the body is provided with R scales and L scales around the knob. The femur measuring device integrates the femur parameter measurement and internal and external rotation positioning functions of the left knee joint and the right knee joint, has continuous internal and external rotation angle selection and adjustment, is greatly convenient for a main doctor to measure the femur parameters, select the model of the femoral prosthesis and position the internal and external rotation angles of the osteotomy of the femur, and improves the operation efficiency.

Description

Thighbone measuring device

Technical Field

The utility model relates to the technical field of medical equipment, especially indicate a thighbone survey device.

Background

The knee joint is the largest and most complex joint in the human body, the knee replacement is to replace the whole or partially damaged natural knee joint of a patient with a knee prosthesis, and in the total knee replacement, multi-plane and multi-angle osteotomy is required to be performed on the femoral side in order to install the femoral side prosthesis. Generally, an osteotomy is firstly carried out at the far end of the femur, then the parameter of the femoral condyle is measured by taking the osteotomy surface as a reference surface, and the position of the osteotomy module is determined in the next step. The measurement of the femoral condyle parameters is mainly to determine the spacing between the femoral posterior condyle and the femoral anterior curved surface so as to select the femoral prosthesis with the proper specification. The determination of the position of the osteotomy module is generally based on the femoral posterior condyle to determine the internal and external rotation angle and the anterior-posterior position of the osteotomy module, or based on the femoral anterior curvature.

In the prior art, the femur parameter measurement and external rotation positioner is generally divided into a left positioner and a right positioner, the left positioner is used for the left knee joint, the right positioner is used for the right knee joint, the operation is complex, the instrument cost is higher, and generally only part of limited fixed external rotation angles are provided for selection, such as 3 degrees or 5 degrees, the fixed external rotation angles hardly meet the personalized selection of the existing population, and great operation limitation is caused to the operation. Still other positioners, while providing more options for the degree of external rotation, increase the cost of the instrument, increase the number of surgical procedures, extend the time of the procedure, and increase the risk of the procedure.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a thighbone survey device to solve current thighbone parameter measurement and the outward rotation locator outward rotation angle selection limitation, outward rotation angular adjustment complicacy and operate complicated problem.

In order to solve the technical problem, the utility model provides a following technical scheme:

a femur measuring device comprises a body, wherein a positioning plate is arranged at the bottom of the body, a slide bar capable of moving up and down and rotating left and right is inserted into the top of the body, a probe capable of moving along the top of the slide bar is inserted into the top of the slide bar, a first specification scale mark is arranged on the probe, and a second scale mark is arranged on the front side of the body; the rear side of the body is provided with an outward rotating plate, the front side of the body is provided with a knob which can drive the outward rotating plate to rotate, and the front side of the body is provided with R scales and L scales around the knob.

The knob is connected with the eccentric shaft, the eccentric shaft is provided with a groove, and the bottom of the external rotating plate is provided with a bulge matched with the groove.

The outer rotating plate is hinged to the body through a cylindrical pin, a clamping groove is formed in the rear side of the outer rotating plate, and a limiting structure matched with the clamping groove is arranged on the rear side of the body.

The top end of the sliding rod is provided with a head, the head is provided with a horizontal sliding groove, and the detection needle is arranged in the sliding groove.

A damping device is arranged between the body and the knob, and a damping device is arranged between the sliding rod and the probe needle.

Preferably, the damping device is a spring and a ball.

The ball plunger is arranged in the mounting hole.

The two sides of the outward rotating plate are provided with positioning lugs, and positioning holes are formed in the positioning lugs respectively.

Preferably, the end of the probe needle is provided with a silica gel handle.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

in the scheme, the femur measuring device integrates the femur parameter measurement and internal and external rotation positioning functions of the left knee joint and the right knee joint, and has continuous internal and external rotation angle selection and adjustment, so that great convenience is brought to an attending doctor to measure the femur parameter, select the model of the femoral prosthesis and position the internal and external rotation angles of the osteotomy of the femur, and the operation efficiency is improved.

Drawings

FIG. 1 is an exploded view of the femoral measurement device of the present invention;

FIG. 2 is a schematic structural view of the femur measuring apparatus of the present invention;

FIG. 3 is a front view of the femoral measurement device of the present invention;

FIG. 4 is a top view of the femoral measurement device of the present invention;

fig. 5 is a side view of the femoral measurement device of the present invention.

[ reference numerals ]

1. A silica gel handle;

2. a probe pin;

3. a ball bearing;

4. a spring;

5. a slide bar;

6. a body;

7. a knob;

8. an eccentric shaft;

9. a cylindrical pin;

10. an outward rotating plate;

11. a ball plunger;

12. a sleeve;

13. and (7) a gasket.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 5, an embodiment of the present invention provides a femur measuring apparatus, including a body 6, a sliding rod 5, a probe 2 and an external rotation plate 10, wherein a positioning plate protruding rearward is disposed at the bottom of the body 6, the positioning plate is in the shape of a sole, disposed at two sides of the body 6, and used for supporting a posterior femoral condyle, and performing measurement of femoral condyle parameters and positioning of internal and external rotation angles based on the posterior femoral condyle, a downwardly extending jack is disposed at the top end of the body 6, an observation hole communicating with the jack is disposed at the front side, and two sides of the observation hole are marked with a second scale line; the sliding rod 5 is inserted into the jack and can slide and rotate up and down in the jack, and the sliding rod 5 is provided with an identification line matched with the scale line so as to measure the front and back diameters of the femur and detect the position of a concave point of a curved surface at the front side of the femur; the detection needle 2 is horizontally connected to the top end of the sliding rod 5 in a sliding mode, and a first scale mark corresponding to the femoral prosthesis with the corresponding specification and model is marked on the detection needle 2; the center of the outward rotating plate 10 is hinged to the back of the body 6 through a cylindrical pin 9, a knob 7 used for controlling the outward rotating plate 10 to rotate is arranged on the front of the body 6, an R scale and an L scale are arranged around the knob 7, and a mark line matched with the knob 7 is arranged on the knob 7.

As shown in fig. 1, the knob 7 and the gasket 13 are connected to an eccentric shaft 8, a groove is formed on the eccentric shaft 8, a protrusion matched with the groove is formed at the bottom of the outward turning plate 10, and the outward turning plate 10 can be pulled when the eccentric shaft 8 rotates, so that the outward turning positioning angle can be adjusted. The specific external rotation angle value can be read out through the angle scales on the body 6, if the external rotation angle value is the left knee, the L scale is read, and if the external rotation angle value is the right knee, the R scale is read.

Wherein, the draw-in groove has been seted up to the intermediate position of outer board 10 rear side of spiraling, 6 rear sides of body be equipped with draw-in groove complex limit structure restricts outer board 10 pivoted extreme position revolves, and is concrete, respectively has 0 to 7 continuous inside and outside angle of spiraling to select the adjustment about.

As shown in fig. 2, the top end of the sliding rod 5 is provided with a head, the head is provided with a sliding groove in the horizontal direction, and the detection needle 2 is arranged in the sliding groove and can slide in the sliding groove, so that the position of a concave point of a curved surface on the front side of a femur can be conveniently detected.

As shown in fig. 1, a damping device is arranged between the body 6 and the knob 7 to provide proper damping and locking for the knob 7, specifically, the body 6 is provided with a blind hole above the knob 7, a spring 4 and a ball 3 are installed in the blind hole, and a concave pit matched with the blind hole is arranged on the periphery of the knob. The slide bar 5 with be equipped with damping device between the probe needle 2, it is specific, the blind hole has been seted up to the spout bottom, installs spring 4 and ball 3 in, for the probe needle 2 provides suitable damping when sliding in the spout for it is more smooth to slide.

Wherein, a side of the body 6 is provided with a mounting hole communicated with the jack, and a ball plunger 11 is arranged in the mounting hole to provide proper damping for the sliding and the rotation of the sliding rod 5.

As shown in fig. 3, two sides of the outward rotating plate 10 are provided with positioning lugs, the positioning lugs are respectively provided with positioning holes, the positioning holes are provided with sleeves 12, and the thighbone can be drilled and positioned through the positioning holes.

Wherein, the tip of probe 2 is equipped with silica gel handle 1, silica gel handle 1 adopts medical silica gel material and has the bead, has increased frictional force, and the doctor of being convenient for is handheld.

The utility model provides a thighbone survey device use as follows:

after the distal femur osteotomy is completed, the back surface of the femur measuring device is attached to the distal femur osteotomy surface, the two side positioning plates at the lower end of the body 6 are respectively attached to the inner side and the outer side of the posterior femur, then an operator can insert into the inner hexagonal groove of the knob 7 by means of a corresponding hexagonal screwdriver, and the knob 7 is selected and rotated to a required angle by observing the R scale or the L scale around the knob 7. After confirmation, the operator can drill a hole in the distal end of the femur by using a tool such as a fine drill through the positioning holes on both sides of the outward rotating plate 10.

An operator can vertically slide, rotate the sliding rod 5 and stretch the probe 2 forwards and backwards, the contact at the front end of the probe 2 can be used for detecting the proper position of the front side of the femur, and the parameters of the femur condyle can be determined through the second scale marks on the two sides of the observation hole and the identification lines on the sliding rod 5.

In the scheme, the femur measuring device integrates the femur parameter measurement and internal and external rotation positioning functions of the left knee joint and the right knee joint, and has the continuous internal and external rotation angles from 0 degree to 7 degrees for selection and adjustment, so that great convenience is brought to an attending doctor for measuring the femur parameters, selecting the model of the femoral prosthesis and positioning the internal and external rotation angles of the osteotomy of the femur, and the operation efficiency is improved.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A femur measuring device is characterized by comprising a body, wherein a positioning plate is arranged at the bottom of the body, a slide bar capable of moving up and down and rotating left and right is inserted into the top of the body, a probe capable of moving along the top of the slide bar is inserted into the top of the slide bar, a first specification scale mark is arranged on the probe, and a second scale mark is arranged on the front side of the body;

the rear side of the body is provided with an outward rotating plate, the front side of the body is provided with a knob which can drive the outward rotating plate to rotate, and the front side of the body is provided with R scales and L scales around the knob.

2. The femoral measurement device of claim 1, wherein the knob is connected to an eccentric shaft, the eccentric shaft is provided with a groove, and the bottom of the external rotation plate is provided with a protrusion matching with the groove.

3. The femoral measurement device of claim 1, wherein the external rotation plate is hinged to the body through a cylindrical pin, a slot is formed in a rear side of the external rotation plate, and a limiting structure matched with the slot is formed in a rear side of the body.

4. The femoral measurement device of claim 1, wherein the sliding rod has a head at a top end thereof, the head having a horizontal sliding slot, and the probe is disposed in the sliding slot.

5. The femoral measurement device of claim 1, wherein a damping device is disposed between the body and the knob, and a damping device is disposed between the sliding bar and the probe.

6. The femoral sizing device of claim 5, wherein the dampening device is a spring and a ball.

7. The femoral measurement device of claim 1, wherein the body defines a mounting hole on a side thereof in communication with the receptacle, the mounting hole defining a ball plunger therein.

8. The femoral measurement device of claim 1, wherein the external rotation plate has positioning lugs on both sides thereof, and the positioning lugs have positioning holes formed thereon.

9. The femoral measurement device of claim 1, wherein the probe needle is provided with a silicone handle at its end.