Gap measuring block

Abstract

The invention discloses a gap measuring block. The gap measuring block comprises a measuring block body, wherein an adjusting block is arranged at the upper end of the interior of the measuring blockbody, a height adjusting mechanism is arranged between the measuring block body and the adjusting block, a kidney-shaped hole is formed in the height adjusting mechanism, a force line rod is insertedinto the kidney-shaped hole, and a lock catch is connected to the force line rod in a sleeving mode; the height adjusting mechanism comprises a rotary drum, a fixing drum, an annular groove, a spiralgroove, a fixing pin and a guide pin, wherein the rotary drum is located between the measuring block body and the adjusting block, the fixing drum is located in the rotary drum, the annular groove isformed in the contact position of the lower portion of the rotary drum and the measuring block body, and the spiral groove is formed in the contact position of the middle of the rotary drum and the adjusting block; and the fixing pin is arranged in the spiral groove in a penetrating mode, and the guide pin is arranged in the spiral groove. The height of the gap measuring block can be convenientlyadjusted, the steps of repeatedly taking down the gap measuring block, mounting a supplementary block and performing measuring again are not needed during measurement, and satisfactory measurement canbe achieved at a time through adjustment.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a gap measuring block. Background technique [0002] Knee replacement surgery is a surgery that uses prostheses to replace human joints. During the operation, it is necessary to measure the gap between the femur and tibia to select a suitable prosthesis, that is, to measure the extension gap and flexion gap. There are many kinds of gaps on the market Measuring blocks, the usual gap measuring blocks are used to measure the height of the posterior femoral condyle after osteotomy. With the improvement of the current concept and the accuracy of surgical requirements, it is necessary to measure the gap for the first time before the posterior condyle osteotomy. The traditional gap measurement The block cannot meet the requirements, and there are some defects in the traditional gap measuring block: [0003] 1. When using the gap measuring block to measure the flexion gap, it needs to b...

AI Technical Summary

Problems solved by technology

[0002]Knee replacement surgery is a surgery that uses prostheses to replace human joints. During the operation, it is necessary to measure the gap between the femur and the tibia to select a suitable prosthesis, namely To measure the extension gap and flexion gap, there are many kinds of gap measuring blocks on the market. The usual gap measuring blocks are used to measure the height of the posterior femoral condyle after osteotomy. With the improvement of the current concept and the accuracy of surgical requirements, it is necessary to The gap is measured for the first time before the osteotomy of the posterior condyle. The traditional gap measuring block cannot meet the requirements, and there are some defects in the traditional gap measuring block:

[0003] 1. When using the gap measuring block to measure the buckling gap, it needs to be used in conjunction with the 4-in-1 osteotomy module. Currently, there are 4-in-1 osteotomy modules with different designs on the market , the middle part of these four-in-one osteotomy modules has a raised part at the contact position of the gap measuring block, which cannot be used universally with the traditional gap measuring block;

[0004]Second, during the operation, if the gap measuring block measured for the first time is inaccurate, it is necessary to remove the gap measuring block, and then add a supplement to the gap measuring block. The most accurate gap size can be obtained repeatedly in this way, which makes the operation cumbersome and prolongs the time;

[0005]Third, the straightening gap and the buckling gap are both small, in millimeters, so the gap between the measuring block and the patch must be closely matched and cannot be shaken to measure accurately. However, the existing gap measuring block and the patch are clamped to each other through grooves and pins, and the clamping is relatively tight, which is difficult to disassemble, which will cause delays in surgery or inconvenience in cleaning;

[0006] 4. When measuring the gap measuring block, it needs to be used in conjunction with the force line rod. After the force line rod is adjusted properly, it needs to be fixed with the force line rod to guide the gap measuring block and The mechanical axis is vertical to ensure that there is no deviation in the measurement. The fixation of the force wire rod in the traditional device is more complicated and difficult to operate. If it is loose, the measurement result will be inaccurate, which will reduce the service life of the prosthesis or even fail the operation;

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