Intramedullary bone lengthening device using memory alloy spring electromagnetic heating

Abstract

The invention discloses an intramedullary bone lengthening device using memory alloy spring electromagnetic heating. The device comprises an intramedullary bone lengthening assembly and an electromagnetic heating temperature control assembly, wherein the intramedullary bone lengthening assembly comprises an upper intramedullary nail and a lower intramedullary nail, and a memory alloy spring is arranged between the upper intramedullary nail and the lower intramedullary nail; the electromagnetic heating temperature control assembly comprises a temperature sensing module, an in-vitro electromagnetic heating module and a temperature control module; the sensing end of the temperature sensing module is in contact with the memory alloy spring so that the accurate temperature of the in-vivo memoryalloy spring can be accurately acquired; meanwhile, the temperature sensing module converts acquired temperature signals into digital signals and sends the digital signals to the temperature controlmodule, and the temperature control module analyzes and compares the real-time temperature with a preset target temperature so that the temperature control module can accurately control the electromagnetic heating module according to a comparison result, then the deformation range of the memory alloy spring is accurately controlled, and the precision of a bone lengthening correction operation is guaranteed.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intramedullary bone prolongation device using memory alloy springs for electromagnetic heating. Background technique [0002] Bone lengthening surgery is an effective method to treat limbs with different lengths caused by various reasons. It cuts the bone, retains soft tissue and blood supply, uses a special traction device to fix both ends, and gradually applies tension to the bone. Stretch slowly, continuously stimulate the body tissue, stimulate the regeneration potential of human tissue, make the osteotomy gap form new bone, and achieve the purpose of bone regeneration. [0003] The most commonly used clinical external fixation extension frame is represented by the Ilizarov external fixation extension frame, which uses multi-planar fine Kirschner wires to penetrate the limbs and then connects to the ring fixator, and uses 3-4 screw rods to form a three-dimensional external f...

AI Technical Summary

Problems solved by technology

The most advanced system is the memory alloy spring bone extension intramedullary nail (SMALL) system similar to the fitbone system reported in the literature, which is observed by three thermometers respectively set under the receiving coil, bone and surrounding soft tissue. Therefore, The collected temperature is not the exact temperature of the body of the memory alloy spring material, and medical personnel need to manually observe the data of the thermometer to adjust the working mode of the heating module in real time, and the accuracy of manual operation is low, which further reduces the overall bone elongation. Precision in corrective surgery

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