Design and development of measuring method for medical catheter distortion
Catheter distortion may occur during the extrusion process,but there is no test method for catheter distortion at present.To solve this problem,a method for measuring catheter distortion was proposed and a measuring system for catheter distor-tion was designed.The system includes a base plate,a conduit fixing module,a fixture adjusting module,a left measuring part and a right measuring part with the same structure and symmetrical distribution.The catheter holding module is used to hold the catheter in place to prevent movement during measurement.The clamp up and down adjustment module is used to adjust the position of the catheter holding module so that the center of the catheter is in the center of the measuring disc.The left measurement section includes a left measurement module for measuring the left catheter torsion angle and a left guide module for fine-tuning the left cath-eter fixing template.The structure and function of the measurement section on the right are the same as those on the left.The distor-tion degree of the catheter was obtained by comparing the distortion degree of both ends of the catheter.The multi-cavity tracheal intubation was tested,and the experiment verified that the test method could quantify the distortion degree of the catheter and objec-tively obtain the distortion degree of a batch of catheters,so as to establish qualified testing standards according to different prod-ucts,then to improve the product quality and meet the actual use needs.The test method can test the single cavity catheter with developing line,the multi-cavity catheter with developing line and the multi-cavity catheter without developing line,and has strong practical value and popularization value.
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