Lower limbs isometric measuring device used for all-hip joint displacement operation

A technology of total hip replacement and measuring device, applied in the field of medical devices, can solve the problems of affecting the measurement results, difficulty, limited accuracy, etc., and achieve the effect of accurate measurement values

CN101125085AInactive Publication Date: 2008-02-20SHAOXING PEOPLES HOSPITAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-02-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a lower extremities isometric measuring device used for total hip replacement and pertains to the technical field of medical equipments, including a connecting rod, two sleeves which are arranged on the connecting rod and are movably connected with the connecting rod, and four positioning pins which are detachably arranged on the two sleeves; when in total hip replacement, the lower extremities isometric measuring device is arranged at the femur side and acetabulum side, so as to respectively read the scale values at the junctions of the positioning pins which are positioned below the connecting sleeves and calculate the difference of the two values, then the connecting rod, the connecting sleeves and the positioning pins at the femur side are removed, after the installation of the hip prosthesis for standard trying mold, the hip joint is arranged at the first measuring position for measurement, the measurement value is compared with the measurement value before the dislocation, furthermore the present invention can reduce the degree and the incidence of the non-isometric low extremities to the greatest extent under the premise of not affecting the balance of the surrounding soft tissues of the hip joint by the adjustment of the insertion depth of the femoral prosthesis, the adjustment of the neck length and the usage of the prosthesis with the eccentric distance.
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Description

technical field

[0001] The invention relates to a measuring device for surgery, in particular to a lower limb isometric measuring device for total hip replacement, belonging to the technical field of medical devices. Background technique

[0002] After hip replacement surgery, claudication is one of the most common symptoms and an important cause of patient dissatisfaction. There are many reasons for claudication after total hip arthroplasty, such as prosthesis loosening, infection, abnormal structural reconstruction, unequal length of the lower limbs, soft tissue imbalance around the hip joint, heterotopic ossification, neuromuscular imbalance, and other factors outside the hip joint. Factors such as degenerative diseases of the spine, knee and ankle joints, etc., and the most common reason is the unequal length of the lower limbs after surgery. Domestic Jishuitan Hospital Zhang Hong and others reported that after total hip replacement, the incidence of unequal length of l...

Examples

Embodiment Construction

[0015] As shown in FIG. 2 , the present invention includes a connecting rod 1 , a sleeve 2 movably connected with the connecting rod 1 , and a positioning pin 3 detachably mounted on the sleeve 2 .

[0016] The connecting rod 1 is designed as a straight bar, with a scale 11 marked on it. In the present embodiment, the connecting rod 1 is preferably made of 316L stainless steel. Accurately measure the change in the length of the lower limbs before and after total hip replacement, and accurately adjust the length of the lower limbs during the operation according to the preoperative measurement of the patient's lower limbs and the measurement of the standard template, so as to reduce the occurrence of unequal lengths of the lower limbs.

[0017] The sleeve 2 is also made of 316L stainless steel, and there are two. A chute 21 is arranged horizontally on the sleeve 2. The chute 21 is preferably arranged at the rear of the sleeve 2. The size of the chute 21 is the same as that of the...