In order to improve the wearing comfort and bearing effectiveness of the exoskeleton, based on the prototype and working mechanism analysis of a relaxation wearable system for knee exoskeleton robot, the static optimization synthesis and its method are studied. Firstly, based on the construction of the virtual prototype model of the system, a comprehensive wearable comfort evaluation index considering the factors such as stress, deformation and the proportion of stress nodes was constructed. Secondly, based on the static simulation and evaluation index of system virtual prototype, multi-objective genetic optimization and local optimization synthesis of armor layer topology were carried out. Finally, the model reconstruction simulation data confirmed that the system had good wearing comfort. Our study provides a theoretical basis for the bearing performance and prototype construction of the subsequent wearable system.
ObjectiveTo evaluate the effect of postoperative no indwelling urethral catheters in lung operation. MethodsIn this prospective cohort study, we recruited 100 patients who were scheduled for pulmonary lobectomy under general anesthesia in a single institution of Thoracic Surgery Department in West China Hospital between April and December 2014. These patients were divided into two groups including a no indwelled urethral catheter group (NIUC, 50 patients) and an indwelled urethral catheter group (IUC, 50 patients). The clinical effect was compared between the two groups. ResultsThere was no statistical difference in incidence of postoperative urinary retention or urinary tract infection between the two groups (P=0.433, 0.050). However, the comfort degrees(0 degree) of patients in the NICU group was significantly higher than that of the ICU group with a statistical difference (P=0.002). While postoperative hospitalization time in the NICU group (P=0.023) was shorter than that in the ICU group (P=0.004). Prostatic hyperplasia was the high risk factor for the lung postoperative urinary retention (P=0.056). ConclusionPostoperative no indwelling urethral catheters in lung operation has the benefit of improving the comfort degrees of inpatients and increasing the postoperation urinary retention.
Objective To investigate the comfort status of patients undergoing video electroencephalogram (VEEG) examination and explore its influencing factors. Method A total of 177 patients who underwent VEEG examination in the Second Affiliated Hospital of Guangzhou Medical University from March 2023 to February 2024 were selected as the research subjects, and their comfort status and influencing factors during the examination period were analyzed. Result The comfort level of patients undergoing VEEG examination was at a moderate to high level (68.9% and 31.1%, respectively); complete mastery of VEEG health knowledge accounted for 49.2% and 65.5% in the moderate and high comfort groups, respectively. Logistic regression analysis results showed that head discomfort and lack of knowledge of VEEG health were independent influencing factors on the comfort of VEEG examination (P<0.05). Conclusions The comfort level of patients undergoing VEEG examination is at a moderate to high level of comfort; the overall mastery of knowledge related to video electroencephalography is insufficient and still needs further improvement; medical staff should pay attention to the comfort of patients and their mastery of relevant knowledge in examinations. They should take targeted intervention measures in a timely manner based on influencing factors, improve their knowledge level and cooperation with VEEG examinations, reduce the occurrence of discomfort during examinations, and improve the overall comfort level of VEEG examinations.
This paper aims to explore the thermal feelings of different cover materials effect on wheelchair cushion comfortableness, and to build a mathematical model for motorized wheelchair cushion comfortableness. By measuring temperature and humidity between the contact face of motorized wheelchair cushion and human body as well as the setting posture adjustment time while cushion cover materials are nylon cloth, leather, fishnets cloth. At the same time, each volunteer took a questionnaire about the comfort of different cushion cover materials. Results showed that fishnets cloth was most comfortable, leather was worst, while nylon cloth was in between the two. The experimental objective data were consistent with the subjective data. We built a back propagation (BP) neural network mathematical model for motorized wheelchair cushion comfortableness. This study will provide objective reference to motorized wheelchair for the designers and users.
Objective To investigate the effectiveness of the reverse traction device in the preoperative treatment of high-energy tibial plateau fractures. Methods A retrospective study was conducted to analyze the clinical data of 33 patients with high-energy tibial plateau fractures who met the selection criteria between December 2020 and December 2023. All patients were treated by open reduction and internal fixation. According to the preoperative traction method, they were divided into the observation group (16 cases, treated with a reverse traction device on the day of admission) and the control group (17 cases, treated with heel traction on the day of admission). There was no significant difference in baseline data such as gender, age, body mass index, affected side, cause of injury, fracture Schatzker classification between the two groups (P>0.05). Preoperative waiting time, preoperative related complications (nail channel loosening, nail channel oozing, nail channel infection, soft tissue necrosis, soft tissue infection, deep vein thrombosis of the lower extremity, etc.), operation time, and total hospitalization time were recorded and compared between the two groups. On the 4th day after traction, visual analogue scale (VAS) score was used to evaluate the pain relief of the patients, the swelling value of the affected limb was measured, and the Immobilization Comfort Questionnaire (ICQ) score was used to evaluate the perioperative hospital comfort of the patients. Results Both groups of patients completed the operation successfully, and the operation time, total hospitalization time, and preoperative waiting time of the observation group were significantly less than those of the control group (P<0.05). There was no preoperative related complications in the observation group; in the control group, 3 patients had nail channel loosening and oozing, and 2 cases had the deep vein thrombosis of the lower extremity; the difference in the incidence of complication between the two groups was significant (P<0.05). On the 4th day after traction, the ICQ score, VAS score, and limb swelling value of the observation group were significantly better than those of the control group (P<0.05). X-ray films showed that the tibial plateau fracture separation and lower limb alignment recovered after calcaneal traction in the control group, but not as obvious as in the observation group. The fracture gap in the observation group significantly reduced, the tibial plateau alignment was good, and the lateral angulation deformity was corrected. Conclusion The use of reverse traction treatment in patients with high-energy tibial plateau fractures on admission can accelerate the swelling around the soft tissues to subside, reduce patients’ pain, shorten the preoperative waiting time, improve the patients’ preoperative quality of life, and contribute to the shortening of the operation time, with a good effectiveness.