CN-224220232-U - Femur reference frame

CN224220232UCN 224220232 UCN224220232 UCN 224220232UCN-224220232-U

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to a femur reference frame which is mainly used for being arranged on the femur of a patient in a robot-assisted artificial total knee arthroplasty, so that a robot can accurately identify and position the femur; the device mainly comprises a fixing part, a connecting rod, a reference frame and a reference frame, wherein the fixing part is provided with a first axis in the height direction, the connecting rod is provided with a first end and a second end, the first end is connected with the fixing part, the second end is positioned above the first end in the extending direction of the first axis, the distance between the second end and the first axis is larger than the distance between the first end and the first axis, the reference frame is arranged on one side of the connecting rod, the distance between the reference frame and the first end is larger than the distance between the reference frame and the second end, and the problems that when the reference frame is installed on a femur of a patient, an operation incision needs to be increased or prolonged and the movement of a mechanical arm of an operation robot is prevented are mainly solved.

Inventors

CHAI WEI
ZHANG HAOCHONG
An Haoming
TANG YUNHAO

Assignees

中国人民解放军总医院第四医学中心

Dates

Publication Date: 20260512
Application Date: 20241224

Claims (6)

1. A femoral reference frame, comprising: a fixing portion having a first axis in a height direction; The connecting rod is provided with a first end and a second end, the first end is connected with the fixed part, the second end is positioned above the first end in the extending direction of the first axis, and the distance between the second end and the first axis is larger than the distance between the first end and the first axis; The reference frame is arranged on one side of the connecting rod, and the distance between the reference frame and the first end is larger than the distance between the reference frame and the second end; the fixing part comprises a fixing piece and a connecting arm, wherein the first end of the connecting rod is rotatably connected with the connecting arm; The connecting rod is provided with a first side wall and a second side wall which are opposite to each other, wherein the first side wall is provided with a first connecting part, the second side wall is provided with a second connecting part, and the reference frame is detachably connected with the first connecting part and the second connecting part; The reference frame is provided with a bottom end face, wherein the bottom end face is provided with a connecting shaft, and the reference frame is connected with the first connecting part and the second connecting part through the connecting shaft; The first connection portion includes: The plurality of arc-shaped fixing pieces are arranged on the first side wall in a circumferential array, one end of each arc-shaped fixing piece far away from the first side wall is inclined towards the opposite arc-shaped fixing piece, and the connecting shaft can be inserted between the plurality of arc-shaped fixing pieces; And the restraining pieces are connected with the arc-shaped fixing pieces, and can be close to and far away from the first side wall in the height direction of the arc-shaped fixing pieces.
2. The femoral frame of claim 1, wherein the connecting arm is connected to an outer wall of the mount, wherein the connecting arm is angled from the first axis.
3. The femoral reference frame of claim 1, wherein the connecting arm is parallel to the first axis.
4. The femoral reference frame of claim 1, wherein the first and second connection portions are mirror images of each other.
5. The femoral frame of claim 1, wherein the constraint is cylindrical and the constraint has a height less than 1/2 of the arcuate anchor tab height.
6. The femoral frame of claim 5, wherein the outer wall of each arcuate anchor tab is provided with a first thread and the inner side of the constraint is provided with a second thread, wherein the first thread engages the second thread.

Description

Femur reference frame Technical Field The utility model belongs to the technical field of medical instruments, and particularly relates to a femur reference frame. Background In the robot-assisted artificial total knee arthroplasty, a femoral reference frame needs to be placed, so that the robot can accurately identify and position the femur. The existing reference frame connecting device is a straight rod type, and if the existing reference frame connecting device is placed in an incision, the incision can be prolonged, and the bleeding amount can be increased. Or additionally making an incision in the area distal to the femoral resection that increases the risk of infection, on the one hand, by increasing bleeding and on the other hand, by being closer to the perineum. The existing femur reference frame is mainly placed at two positions, namely, the position outside the incision is located at the position of 4 fingers and 10 mm inwards on the patella, under the installation mode, an additional incision is needed to be made on the thigh of a patient, and the other installation mode is installed in the incision and positioned at the upper anterior cortex of the femoral condyle, but in order to avoid the reference frame interfering with the mechanical arm and the incision needs to be prolonged under the installation mode, the two methods increase the risks of bleeding and infection, and the first method is easy to cause the displacement of the reference frame due to the traction of quadriceps when stretching the knee joint, so that the ideal installation mode is not to prolong and increase the incision and not interfere with the mechanical arm. The present utility model addresses the above-mentioned problems by providing a femoral reference frame. Disclosure of utility model In order to overcome the problems in the prior art, the utility model adopts the following technical scheme that the femur reference frame comprises a fixing part, a connecting rod, a reference frame and a reference frame, wherein the fixing part is provided with a first axis in the height direction, the connecting rod is provided with a first end and a second end, the first end is connected with the fixing part, the second end is positioned above the first end in the extending direction of the first axis, the distance between the second end and the first axis is larger than the distance between the first end and the first axis, and the reference frame is arranged on one side of the connecting rod, and the distance between the reference frame and the first end is larger than the distance between the reference frame and the second end. In some embodiments of the application, the fixing portion comprises a fixing piece and a connecting arm, wherein the connecting arm is connected with the outer wall of the fixing piece, and an included angle is formed between the connecting arm and the first axis. Further, the first end of the connecting rod is rotatably connected with the connecting arm. Further, the included angle ranges from 35 degrees to 75 degrees Further, the connecting arm is parallel to the first axis. In some embodiments of the present application, the connecting rod has a first side wall and a second side wall opposite to each other, wherein the first side wall is configured with a first connection portion, the second side wall is configured with a second connection portion, and the reference frame is detachably connected to the first connection portion and the second connection portion. Further, the first connecting portion and the second connecting portion are arranged in a mirror image mode. Further, the reference frame has a bottom end face, wherein the bottom end face is provided with a connecting shaft, and the reference frame is connected with the first connecting portion and the second connecting portion through the connecting shaft. The first connecting part comprises a plurality of arc-shaped fixing plates and a restraint piece, wherein the arc-shaped fixing plates are arranged on the first side wall in a circumferential array, one end of each arc-shaped fixing plate, which is far away from the first side wall, is inclined towards the opposite arc-shaped fixing plates, the connecting shaft can be inserted between the arc-shaped fixing plates, and the restraint piece is connected with the arc-shaped fixing plates, and can be close to and far away from the first side wall in the height direction of the arc-shaped fixing plates. Further, the restraining piece is cylindrical, and the height of the restraining piece is smaller than 1/2 of the height of the arc-shaped fixing piece. Further, the outer wall of each arc-shaped fixing piece is provided with a first thread, and the inner side of the constraint piece is provided with a second thread, wherein the first thread is meshed with the second thread. The utility model has the beneficial effects that 1, the connecting rod is deflected to the proximal end of the femur of a pa