Objective In order to address the issues of inconvenience,high medical costs,and lack of universality associated with traditional knee rehabilitation equipment,a portable intelligent wheelchair for knee rehabilitation was designed in this study.Methods Based on the analysis of the knee joint's structure and rehabilitation mechanisms,an electric pushrod-driven rehabilitation institution was developed.A multi-functional module was designed with a modular approach,and the control of the wheelchair body and each functional module was implemented using an STM32 single-chip microcomputer.A three-dimensional model was established using SolidWorks software.In conjunction with Adams and Ansys simulation software,kinematic and static analyses were conducted on the knee joint rehabilitation institution and its core components.A prototype was constructed to verify the equipment's actual performance.Results According to the prototype testing,the actual range of motion for the knee joint swing rod is 15.1°～88.9°,the angular speed of the swing rod ranges from-7.9 to 8.1°/s,the angular acceleration of the swing rod varies from-4.2 to 1.6°/s2,the thrust range of the electric pushrod is-82.6 to 153.1 N,and the maximum displacement of the load pedal is approximately 1.7 mm,with the leg support exhibiting a maximum deformation of about 1.5 mm.Conclusion The intelligent knee joint rehabilitation wheelchair meets the designed functions and its actual performance aligns with the design criteria,thus validating the rationality and feasibility of the structural design.

Objective:To explore the influence of cognitive behavioral intervention on self-perceived burden and coping style of patients with cubital tunnel syndrome (CuTS) , so as to provide theoretical basis and practical guidance for the psychological care of patients with cubital tunnel syndrome.Methods:Using the convenient sampling method, a total of 84 patients with cubital tunnel syndrome who were admitted to the Department of Hand and Foot Surgery of the First Hospital of Jilin University from July 2018 to August 2019 were selected as the research objects. According to the random number table method, they were divided into the intervention group (43 cases) and the control group (41 cases) . The control group was given routine nursing care, while the intervention group was given cognitive behavioral intervention on the basis of the control group. The general situation and injury characteristics questionnaire, Self-Perceived Burden Scale (SPBS) and Medical Coping Modes Questionnaire (MCMQ) were used to compare self-perceived burden and medical response methods of patients in the two groups before and after the intervention.Results:In the end, 42 patients in the intervention group and 40 patients in the control group completed the study. Before the intervention, there was no statistically significant difference in scores of SPBS and MCMQ of patients between the two groups ( P>0.05) . After the intervention, the total score of SPBS and the scores of all dimensions of the intervention group were lower than those of the control group, and the differences were statistically significant ( P<0.05) . After the intervention, the score of MCMQ face style dimension of the intervention group was higher than that of the control group, the score of yielding method dimension was lower than that of the control group, and the differences were statistically significant ( P<0.05) . There was no statistically significant difference in the avoidance style dimension scores between the two groups after the intervention ( P>0.05) . Conclusions:Cognitive behavior intervention can effectively reduce self-perceived burden level of the patients and enable them to adopt a positive coping style during the treatment process, which can help recovery of them.