Liquid nitrogen refrigeration clamper and biomechanical measurement device

Abstract

The invention provides a liquid nitrogen refrigeration clamper and a biomechanical measurement device and relates to a biomechanical test instrument. The liquid nitrogen refrigeration clamper comprises a clamper main body and one end of the clamper main body is a tissue fixing surface. The clamper main body comprises a first half clamp member and a second half clamp member matching with the firsthalf clamp member. The outer walls of the first half clamp member and / or second half clamp member are provided with hollow cover-free liquid nitrogen tanks for storing liquid nitrogen. The side of theliquid nitrogen tank fits to the outer wall of the first half clamp member and / or second half clamp member. The liquid nitrogen refrigeration clamper utilizes the liquid nitrogen tank to store liquidnitrogen and utilizes a liquid nitrogen freezing method to fix two ends of a sample. The liquid nitrogen refrigeration clamper can transfer low temperature to harden the biological tissue in the clamper so that the sample sliding-off and fracture in advance are effectively prevented. The biomechanical measurement device comprises the liquid nitrogen refrigeration clamper, can effectively clamp and fix the biological tissue, can measure mechanical properties and can produce accurate test results.

Description

technical field [0001] The invention relates to a biomechanical testing instrument, in particular to a liquid nitrogen cooling fixture and biomechanical measuring equipment. Background technique [0002] The function of tendons and ligaments is to transmit force from muscles to bones, and to limit the range of motion of joints and increase the stability of joints. Trauma, excessive exercise, tumors, etc. can all cause damage to tendons and ligaments. In order to better preserve joint function and improve the quality of life of patients, it is necessary to reconstruct partially damaged or missing tendons and ligaments. When people use autologous, allogeneic or artificial tendon and ligament grafts to repair tissue defects, it is necessary to measure the biomechanical properties of the test materials. Due to the high maximum load value of collagen fibers rich in normal tendons and ligaments and their viscoelastic characteristics, traditional methods often use metal clamps to...

AI Technical Summary

Problems solved by technology

Due to the high maximum load value of collagen fibers rich in normal tendons and ligaments and their viscoelastic characteristics, traditional methods often use metal clamps to fix tendons and ligaments, or use edge sutures to fix biological samples, Practice has proved that the above method is very easy to cause slippage and deformation of the biological tissue at the clamp and suture site; and due to the stress concentration at the clamp fixing place, it is easy to cause premature fracture of the biological tissue, and it is impossible to accurately measure the biological tissue mechanics caused by experimental processing factors. Performance changes, seriously affecting the accuracy and stability of the measurement results

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