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Thighbone length measurement device

A technology of length measurement and femur, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problems of lengthening of side legs, falling off of fixed bone nails, dislocation of femoral head, etc., to avoid excessive contact and facilitate promotion Easy to apply and operate

Active Publication Date: 2014-10-01
BONAWEIKE TIANJIN MEDICAL SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

Changes in the length of the legs often occur after femoral head replacement, mainly manifested as elongation of the side legs. According to statistics, about 60% of patients have elongated lengths of more than 1 cm, resulting in abnormal walking gait and inconvenience to patients in daily activities.
What is more serious is that if the position of the femoral head prosthesis is deviated, it will cause soft tissue damage in the posterior channel and weak soft tissue strength around the joint in the early stage, which will further lead to serious consequences such as the loss of fixed bone screws and dislocation of the femoral head.

Method used

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Embodiment 1

[0031] see figure 1 , this embodiment provides a femoral length measuring device, which is mainly used for real-time measurement of femoral length during femoral head replacement surgery, so as to ensure that the length of both legs after femoral head replacement is consistent and improve the success rate of surgery .

[0032] see figure 1 , the device mainly includes a target mechanism 100 , a binocular camera 200 , a visual measurement mechanism 300 and a display 400 . The target mechanism 100 is used to be fixed on the femur; the position of the binocular camera 200 relative to the hip joint is fixed; the visual measurement mechanism 300 is connected to the binocular camera 200, and the display 400 is connected to the Vision measurement mechanism 300 .

[0033] The binocular camera 200 periodically collects images of the target mechanism 100; the visual measurement mechanism 300 receives the image information of the binocular camera 200, and judges whether the visual mea...

Embodiment 2

[0036] see figure 2 , this embodiment also provides a femur length measuring device, this embodiment is a further improvement on the basis of embodiment one, the technical solution described in embodiment one also belongs to this embodiment, the technology described in embodiment one The scheme will not be described repeatedly. in particular:

[0037] During femoral head replacement, the position of the femur is constantly adjusted and moved. In order to ensure that the target mechanism 100 does not fall off during the adjustment and movement, in this embodiment, the target mechanism 100 is fixed on the femur by bone nails. That is, the targeting mechanism 100 includes a positioning ball 110 and a bone screw 120, the positioning ball 110 is mounted on the end of the bone screw 120, and the bone screw 120 is used to be fixedly connected to the femur. Adopting the positioning ball 110 can make the images of the positioning ball 110 collected by the left and right eye lenses o...

Embodiment 3

[0042] This embodiment also provides a femur length measuring device, which is a further improvement on the basis of embodiment two, and the technical solution described in embodiment two also belongs to this embodiment, and the technical solution described in embodiment two The description will not be repeated. in particular:

[0043] This embodiment mainly improves the structure and function of the binocular camera 200, so that it can be effectively used for the measurement of femur length, and it can be integrated with the visual measurement mechanism 300 into an integrated structure, so that the device is compact in structure. Spend.

[0044] In this embodiment, the binocular camera 200 is provided with two COMS modules (COMS is an image sensor) and two lens modules, and the two COMS modules are respectively used to collect images of the two lens modules, that is, to use for collecting left and right eye images.

[0045] The visual measurement mechanism 300 includes an em...

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Abstract

The invention relates to the technical field of orthopaedic medical apparatuses, in particular to a thighbone length measurement device. The thighbone length measurement device comprises a fixed support device, detection devices and an analysis device, wherein the detection devices are two binocular industrial cameras with two parallel optical axes; the analysis device comprises a display, a main machine and a measurement analysis system. The thighbone length measurement device disclosed by the invention has the following beneficial effects that: a simple and effective thighbone length measurement device used during a thighbone head replacement operation is put forward, and an effective technical means is provided for improving the quality of the thighbone head replacement operation; the device adequately considers the technical characteristics of the thighbone head replacement operation and a vision measurement, the wound surface of a patient cannot be contacted during the measurement process, and the measurement is non-contact measurement; meanwhile, the measurement result is displayed in real time, and assists a doctor to carry out the operation; the device is constructed on the basis of an embedded system, high in integration level, small in size, low in cost, and convenient to popularize and use.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical instruments, in particular to a femur length measuring device. Background technique [0002] Femoral head necrosis is a pathological process that initially occurs in the load-bearing area of ​​the femoral head. Under stress, the trabecular structure of the necrotic bone is damaged, resulting in changes in the structure of the femoral head, collapse and deformation of the femoral head, joint inflammation, joint activity and weight-bearing walking. disfunction. Femoral head replacement surgery is an effective medical method to solve femoral head necrosis. [0003] In femoral head replacement surgery, doctors currently rely mainly on the naked eye and feel to determine whether the length and position of the artificial joint after replacement is correct. The length of the replacement joint mainly depends on the doctor's experience and judgment. It is common for patients to have unequal len...

Claims

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Application Information

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IPC IPC(8): A61B5/107
Inventor 吴浩胡瑞
Owner BONAWEIKE TIANJIN MEDICAL SCI & TECH CO LTD
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