Research On Design Of Stretch Indicator Icon Based On Bandage Strain Prediction

Compression therapy is often used in the intervention and treatment of venous and lymphatic diseases,scar softening,postoperative care of joint replacement,etc.,playing an important role in medical rehabilitation and postoperative care.However,clinical practice has problems with poor consistency of pressure at the interface under the bandage and high costs of care.It is predicted that Home Health Care will become the future development direction.Therefore,Effective prediction of the compression capacity of bandage products,and the formation of optimal design methods and application operation guidance of products are urgent problems to improve the efficacy of medical bandages.This project predicted the bandage strain under the target pressure based on the Laplace equation and the bandage load-strain relationship.By exploring the correlation between the accuracy of strain prediction and the choice of tensile conditions in bandage mechanical property testing,the optimal load-strain fitting curve was screened for icon design.And the influence of icon design elements on interface pressure and user bandaging experience was further explored.On this basis,in order to guide the design and help users achieve self-compression care with scientific means,the design and application system of bandage stretching indicator icon was developed.The main research contents and related conclusions are as follows:（1）The effect of different stretching conditions on the distribution of load-strain curves was investigated by means of bandage stretching and recovery experiments.It was found that under the same load,the load-strain distribution satisfied the strain of the primary stretching curve<the strain of the five tensile curves<the strain of the secondary recovery curve.The strain was also significantly influenced by the stretching speed（p<0.05）,with the smallest strain measured at 100 mm/min and the largest strain measured at 500 mm/min for the same number of stretching replies and the same load.（2）Based on Laplace’s equation and the load-strain fitting curve for strain prediction at the bandage,the results of the instrumental simulation showed that the fitting curve and the target pressure had a significant effect on the pressure error（p<0.05）.By comparing the deviation percentage between the target pressure and the measured interfacial pressure under different fitting curves,the load-strain curve fitted under five stretches of 100 mm/min was selected as the best fitting curve.（3）The icon size design was based on the best fitting curve,and the L₁₆(4×2¹²)orthogonal table was used to design experiments to investigate the effects of five visual variables-icon color,icon shape,icon height,icon density and icon composition form-on the functionality of icons under different target pressures.The results showed that the uniformity and consistency of interface pressure and operational confidence were improved by the visual aid of the stretch indicator icons.Combined with subjective evaluation and for the purpose of reducing energy consumption and improving efficiency,recommendations for icon design under different target pressures were made through a comprehensive balancing method.（4）Based on the results of the study on the prediction of strain in bandages and the influence of the icon design elements,MATLAB was used to develop the bandage stretch indication icon design and application.The program provides the appropriate functional modules according to the requirements of the target application.In product development,based on the bandage performance parameters and the number of overlapping layers input by the manufacturer,it outputs recommendations for the design of the stretch indication icon to standardize the icon design;in product use,based on the relevant parameters input by the user,it helps the user to identify the appropriate bandage type and output the operation icon style to standardize the user’s operation and improve the quality of bandaging.The value of this project is to reveal the relationship between tensile load and bandage elongation strain,to investigate the influence of the number of tensile replies and tensile speed on the mechanical property curve of bandages,and to improve the accuracy of bandage strain prediction.Secondly,the influence of the design elements of the bandage stretch indication icon on the functionality of the icon is investigated to fill the gap of existing studies.Finally,the experimental results are integrated to develop a bandage stretch indication icon design and application.The research methods used and the conclusions obtained have implications for the functional design and practical application of bandages.