CN216394387U

CN216394387U - Thighbone condyle measurer

Info

Publication number: CN216394387U
Application number: CN202123015116.7U
Authority: CN
Inventors: 赵小涛; 董骧
Original assignee: Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-29
Anticipated expiration: 2031-12-02

Abstract

The utility model discloses a femoral condyle measuring device, which belongs to the technical field of medical instruments and comprises a first sliding piece, a second sliding piece and a locking piece, wherein the second sliding piece is assembled with the first sliding piece in a vertical sliding mode, the locking piece is used for locking the relative positions of the first sliding piece and the second sliding piece, a first measuring arm which extends forwards and is used for abutting against the joint surface of the posterior condyle of the femur of a patient is arranged at the lower end of the first sliding piece, and a second measuring arm which extends forwards and is used for abutting against the joint surface of the anterior condyle of the femur of the patient is arranged at the upper end of the second sliding piece. The femoral condyle measuring device can be accurately adjusted according to the size of the femoral condyle of each patient, so that a doctor can conveniently select a proper femoral condyle prosthesis, and the operation time is shortened.

Description

Thighbone condyle measurer

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a femoral condyle measuring device.

Background

Total knee arthroplasty is the final and best practice for treating severe knee osteoarthritis. In recent years, with the rapid growth of total knee replacement cases and the expansion of surgical indications, the amount of total knee replacement revision surgery has also shown a rapid growth trend. The artificial total knee joint prosthesis generally comprises a femur (condyle) prosthesis, a tibia prosthesis and a patella prosthesis, the replacement of the femur condyle prosthesis is one of important parts of the total knee joint replacement revision surgery, and since the sizes of the femur condyles of each patient are different, a doctor cannot quickly judge the size of the femur condyle prosthesis used in the replacement, so that the revision surgery time is prolonged.

In order to solve the problems, a condyle measuring instrument with a multi-specification integrated design is available on the market at present, and the purpose of the instrument is to quickly determine the size of the femoral condyle. Because the thighbone condyle of each person of clinical patients is different in size, although the multi-specification condyle measuring device has different models to adapt to the thighbone condyle size of each person, the condyle measuring device of the integrated design cannot be accurately adjusted according to the thighbone condyle size of each patient, data can only be roughly read, the condyle measuring device of different models needs to be selected ceaselessly to be confirmed, the operation is complex, and the operation time is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a femoral condyle measuring device which is simple and convenient in operation and can accurately measure the size of the femoral condyle of a patient.

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

a femoral condyle measuring device comprises a first sliding piece, a second sliding piece and a locking piece, wherein the second sliding piece is assembled with the first sliding piece in a vertical sliding mode, the locking piece is used for locking the relative positions of the first sliding piece and the second sliding piece, the lower end of the first sliding piece is provided with a first measuring arm which extends forwards and is used for abutting against the posterior femoral condyle articular surface of a patient, and the upper end of the second sliding piece is provided with a second measuring arm which extends forwards and is used for abutting against the anterior femoral condyle articular surface of the patient.

Further, the first sliding part is a sliding groove main body, and the second sliding part is a pulley assembled with the sliding groove main body in a sliding manner.

Furthermore, one side of the sliding groove main body, which is far away from the femoral condyle of the patient, is provided with a groove extending along the length direction of the sliding groove main body, the pulley is assembled in the groove in a sliding manner, scales are arranged on the pulley, and the side face of the sliding groove main body is provided with scribed lines for reading the scales.

Furthermore, the cross sections of the side walls on the two sides of the groove are both L-shaped, and the cross section of the pulley is T-shaped matched with the L-shaped.

Further, an included angle between the first measuring arm and a plane where the first sliding part is located is 90 degrees, and/or an included angle between the second measuring arm and a plane where the second sliding part is located is 85-110 degrees.

Further, the width of the first measuring arm and the width of the second measuring arm are both 5-20 mm.

Furthermore, the side of the sliding chute main body is provided with a transverse opening communicated with the groove, and the locking piece is a cam type knob which is hinged in the transverse opening and can extrude the side of the pulley after rotating.

Furthermore, the side surface of the pulley, which is far away from the transverse opening, is provided with a tooth surface extending along the length direction of the pulley, the side surface of the sliding chute main body is provided with a toothed bar meshed with the tooth surface in a rotating mode, and the toothed bar is provided with a driving knob.

Further, a handle is arranged on one side of the first sliding piece, which is far away from the distal joint surface of the patient femoral condyle.

Furthermore, a pair of insertion holes is arranged on the first sliding piece in parallel from left to right, and a pair of insertion columns matched with the pair of insertion holes is arranged at the front end of the handle.

The utility model has the following beneficial effects:

according to the thighbone condyle measurer, the lower end of the first sliding piece and the upper end of the second sliding piece are provided with the first measuring arm which extends forwards and is used for abutting against the joint surface of the rear thighbone condyle of a patient and the second measuring arm which is used for abutting against the joint surface of the front thighbone condyle of the patient respectively, compared with the prior art, the thighbone condyle measurer can accurately adjust according to the size of the thighbone condyle of each patient, a doctor can conveniently select a proper thighbone condyle prosthesis, and operation time is shortened; the lower surface of the second measuring arm on the upper surface of the first measuring arm is a plane, the size of the unilateral condyle of the femoral condyle of a patient can be measured, and a suitable femoral condyle prosthesis can be accurately and quickly selected according to the size of the unilateral condyle. The femoral condyle measuring device is simple and convenient to operate in operation, and can accurately measure the size of the femoral condyle of a patient.

Drawings

FIG. 1 is a schematic view of the overall structure of the femoral condyle measuring device of the present invention;

FIG. 2 is a rear view of the femoral condyle measurer of the present invention;

FIG. 3 is an exploded view of the femoral condyle measuring instrument of the present invention;

FIG. 4 is a schematic view of the assembly structure of the sliding groove main body and the pulley in the femoral condyle measuring device of the present invention, wherein (a) is a perspective view and (b) is a rear view;

FIG. 5 is a schematic view showing the usage of the femoral condyle measuring device of the present invention;

FIG. 6 is an enlarged view of the driving block moving mechanism in the improved embodiment of the femoral condyle measuring device of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The utility model provides a femoral condyle measuring device, which comprises a first sliding piece 1, a second sliding piece 2 assembled with the first sliding piece 1 in an up-and-down sliding way, and a locking piece 3 used for locking the relative positions of the first sliding piece 1 and the second sliding piece 2, wherein the lower end of the first sliding piece 1 is provided with a first measuring arm 11 extending forwards (in the arrow direction in fig. 1) and used for abutting against the articular surface of the posterior femoral condyle of a patient, and the upper end of the second sliding piece 2 is provided with a second measuring arm 21 extending forwards and used for abutting against the articular surface of the anterior femoral condyle of the patient.

When the femur condyle measuring device is used in an operation, the first measuring arm 11 at the lower end of the first sliding piece 1 is inserted into and abutted against the joint surface of the patient's femur posterior condyle (namely, the first measuring arm is in contact with the joint surface of the patient's femur posterior condyle), the second sliding piece 2 is driven to slide up and down relative to the first sliding piece 1 according to the size of the patient's femur condyle, when the second measuring arm 21 at the upper end of the second sliding piece 2 is abutted against the joint surface of the patient's femur anterior condyle (namely, the second measuring arm is in contact with the joint surface of the patient's femur anterior condyle), the size and the type of the patient's femur condyle can be obtained, then the locking piece 3 is used for locking the relative positions of the first sliding piece 1 and the second sliding piece 2, the locking of the size and the type of the femur condyle measuring device is taken out, and the suitable femur condyle prosthesis can be selected by comparing the size of the femur measuring device.

According to the thighbone condyle measurer, the lower end of the first sliding piece and the upper end of the second sliding piece are provided with the first measuring arm which extends forwards and is used for abutting against the joint surface of the rear thighbone condyle of a patient and the second measuring arm which is used for abutting against the joint surface of the front thighbone condyle of the patient respectively, compared with the prior art, the thighbone condyle measurer can accurately adjust according to the size of the thighbone condyle of each patient, a doctor can conveniently select a proper thighbone condyle prosthesis, and operation time is shortened; the upper surface of first measuring arm and the lower surface of second measuring arm are the plane, can measure the size of patient's thighbone condyle unilateral condyle, can select for use suitable thighbone condyle prosthesis for use accurately fast according to the size of unilateral condyle. The femoral condyle measuring device is simple and convenient to operate in operation, and can accurately measure the size of the femoral condyle of a patient. The utility model is mainly suitable for knee joint revision replacement surgery and is used for evaluating the size of the femoral condyle of a patient.

In order to realize the up-and-down sliding assembly of the second sliding part 2 and the first sliding part 1, various structural forms can be adopted, which are easily conceived by those skilled in the art, and for the convenience of implementation, in the present invention, the first sliding part 1 can be a chute main body shown in the figure, and the second sliding part 2 is a pulley which is shown in the figure and is slidably assembled with the chute main body. It is conceivable that the second slider is a chute body, and the first slider is a pulley slidably fitted to the chute body.

As shown in fig. 2, in order to facilitate reading of femoral condyles of different patients, a side of the chute body (i.e., the first sliding part 1) away from the femoral condyles of the patients (i.e., the rear side of the chute body) may be provided with a slot 12 extending along the length direction of the chute body 1, the pulley (i.e., the second sliding part 2) is slidably assembled in the slot 12, the pulley 2 is provided with a scale 22, and the chute body 1 is provided with a scale 13 on the side of the slot 12 for reading the scale 22. In use, the pulley 2 is driven to slide up and down along the slot 12 on the main body 1, and when the second measuring arm 21 at the upper end of the pulley 2 abuts against the anterior condyle of the femur of the patient, the scale 22 indicated by the scale 13 on the side surface of the slot 12 (i.e. the line 13 coincides with the patient femur size scale 22 on the pulley 2) is the size of the patient's femur condyle. In the embodiment shown in the figures, the pulley 2 has different femur size scales and model marks: 1-1.5mm, 1.5mm-2mm, 2mm-2.5mm, 2.5mm-3mm, 3mm-3.5mm, 3.5mm-4mm, 4mm-4.5mm, 4.5mm-5mm, 5mm-5.5mm, 5.5mm-6mm, 6mm-6.5mm, 6.5mm-7mm, 7mm-7.5mm, 7.5mm-8mm, one specification per 0.5 mm.

As shown in fig. 2 and 3, in order to prevent the pulley 2 from falling off the slot 12 of the chute body 1, the cross section (i.e., horizontal plane) of the side walls on both sides of the slot 12 is preferably L-shaped, and the cross section of the pulley 2 is T-shaped to match the L-shape.

The included angle between the first measuring arm 11 and the plane of the first sliding piece 1 is preferably 90 degrees, and the included angle between the second measuring arm 21 and the plane of the second sliding piece 2 is preferably 85-110 degrees, so that the shape of the femur after osteotomy can be better matched, and the size of the femoral condyle of the patient can be measured more accurately. The first measuring arm 11 and the second measuring arm 12 are each one and preferably each 5-20mm wide, e.g. 10mm, 15mm, etc., to accommodate the size of the femoral condyle unilateral condyle.

For locking the relative position of the first slider 1 and the second slider 2, the locking member 3 can adopt various structural forms which are easily thought by those skilled in the art, for example, the locking member is a bolt which is in snap fit with the first slider and the second slider; however, for the convenience of implementation, the locking member 3 of the present invention preferably takes the following structural form:

as shown in fig. 1-3, the side surface (right side surface in the figure) of the chute body 1 is provided with a transverse opening communicated with the slot, and the locking member 3 is a cam type knob hinged in the transverse opening and capable of pressing the side surface (right side surface in the figure) of the pulley 2 after rotating. At this time, the plane where the knob is parallel to the chute body 1 is the locking state (the top end of the cam knob presses the right side surface of the pulley 2), and the plane where the knob is perpendicular to the chute body 1 is the unlocking state (fig. 1).

In the modified embodiment shown in fig. 6, for precise adjustment of the relative position of the carriage 2 and the chute body 1, the side (left side in the drawing) of the carriage 2 remote from the transverse opening may be provided with a toothed surface 23 extending in the longitudinal direction of the carriage 2, the side (left side in the drawing) of the chute body 1 is rotatably fitted in situ with a toothed bar 14 engaging with the toothed surface 23, and the toothed bar 14 is provided with a drive knob (not shown). During the use, utilize drive knob drive ratch 14 to rotate, ratch 14 meshes with the flank of tooth 23 of coaster 2 side mutually to accurate drive coaster 2 is in the fluting 12 of spout main part 1 gliding distance from top to bottom, and then accurate measurement patient's thighbone condyle size model.

In the present invention, the upper surface of the second measuring arm 21 at the upper end of the trolley 2 may be provided with an anti-slip structure for easy holding.

In the present invention, as shown in fig. 1 and 3, in order to facilitate holding of the femoral condyle measuring instrument, a handle 4 may be provided on a side (i.e., a posterior side) of the first slider 1 remote from the distal articular surface of the femoral condyle of the patient.

The fixing manner between the handle 4 and the first sliding member 1 can adopt various structural forms, such as welding, bonding, screw connection, etc., which are easily thought by those skilled in the art, however, for the convenience of disassembly, a pair of insertion holes 15 are arranged on the left and right of the first sliding member 1 of the present invention, and a pair of insertion posts 41 matched with the pair of insertion holes 15 are arranged at the front end of the handle 4. When the femoral condyle measuring device is used, the pair of inserting columns 41 at the front end of the handle 4 are inserted into the pair of inserting holes 15 on the first sliding piece 1, and then the femoral condyle measuring device can be held.

In conclusion, the femoral condyle measuring device can accurately measure the sizes of the femurs of different patients, the sizes of the femoral condyles of the patients can be obtained by observing scales on the pulley through the scribed lines on the sliding groove main body, and the sizes of the femoral condyles of the different patients can be measured by driving the cam type knob to be locked after the sizes of the femoral condyles are confirmed.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The femoral condyle measuring device is characterized by comprising a first sliding piece, a second sliding piece and a locking piece, wherein the second sliding piece is assembled with the first sliding piece in a vertical sliding mode, the locking piece is used for locking the relative positions of the first sliding piece and the second sliding piece, the lower end of the first sliding piece is provided with a first measuring arm which extends forwards and is used for abutting against the posterior femoral condyle articular surface of a patient, and the upper end of the second sliding piece is provided with a second measuring arm which extends forwards and is used for abutting against the anterior femoral condyle articular surface of the patient.

2. The femoral condyle measurer according to claim 1, wherein the first sliding member is a sliding groove main body, and the second sliding member is a pulley slidably fitted to the sliding groove main body.

3. The femoral condyle measurer according to claim 2, wherein a slot extending along a length direction of the sliding chute body is formed on a side of the sliding chute body away from the femoral condyle of the patient, the pulley is slidably mounted in the slot, the pulley is provided with a scale, and the sliding chute body is provided with a scale line on a side surface of the slot for reading the scale.

4. The femoral condyle measurer according to claim 3, wherein the lateral walls of the slot have an L-shaped cross section, and the pulley has a T-shaped cross section matching the L-shaped cross section.

5. The femoral condyle measurer according to claim 1, wherein the angle between the first measuring arm and the plane of the first slider is 90 degrees, and/or the angle between the second measuring arm and the plane of the second slider is 85 to 110 degrees.

6. The femoral condylometer of claim 1, wherein the first and second measuring arms are each 5-20mm wide.

7. The femoral condyle measurer according to claim 3, wherein the side surface of the sliding chute main body is provided with a transverse opening communicated with the groove, and the locking member is a cam type knob hinged in the transverse opening and capable of pressing the side surface of the pulley after rotating.

8. The femoral condyle measurer according to claim 7, wherein the lateral surface of the pulley away from the transverse opening is provided with a tooth surface extending along the length direction of the pulley, the lateral surface of the chute body is rotatably assembled with a toothed rod engaged with the tooth surface in situ, and the toothed rod is provided with a driving knob.

9. The femoral condyle measurer according to any one of claims 1 to 8, wherein the first slide is provided with a handle on a side thereof facing away from the patient's distal articular surface of the femoral condyle.

10. The femoral condyle measuring device as claimed in claim 9, wherein the first sliding member is provided with a pair of insertion holes in parallel at left and right sides, and the front end of the handle is provided with a pair of insertion posts matching with the pair of insertion holes.