Objective To compare the screening ability of the Timed Up and Go Test (TUG),Berg Balance Scale (BBS),Single Leg Stance (SLS) and Brief-Balance Evaluation Systems Test (Brief-BESTest) for fall risk in people with chronic obstructive pulmonary disease (COPD),and to provide references for clinical selection of appropriate screening tools for balance function. Methods From February 2020 to February 2021,a total of 86 COPD patients hospitalized in the department of respiratory and critical care medicine of a tertiary hospital in Guangdong were selected by convenience sampling method. Their balance abilities were assessed using the TUG,BBS,SLS and Brief-BESTest. Taking 3-month history of falls as the diagnostic standard,the identification ability of the 4 scales for falls was compared by Bayes discriminant analysis and the area under the receiver operating characteristic curve (AUC). Results The cross-validation accuracy of TUG,BBS,SLS and Brief-BESTest were 60.47%,68.60%,51.16% and 72.09%. The Brief-BESTest showed the biggest area under ROC curve (0.818),compared with BBS (0.758),TUG (0.686) and SLS (0.568). At the cutoff score of 14,the Brief-BESTest demonstrated a positive test accuracy of 0.786 with the sensitivity of 0.739,the specificity of 0.825. Conclusion Among the 4 balance function tests,brief-BESTest was the best at screening a history of falls in COPD patients. Brief-BESTest was recommended for clinical staff to assess balance and predict fall risk in patients with COPD.

Objective To investigate the effects of intelligent grip strength system on PICC function exercise,so as to prevent catheter-related thrombosis in patients. Methods By convenience sampling,100 tumor patients with PICC who met the inclusion and exclusion criteria were divided into an experimental group and a control group by a random number table method. The patients in the control group used the traditional grip strength ball,while the patients in the experimental group used the intelligent grip strength system with the intelligent grip ball as the carrier for functional exercise. 28 days after catheterization,the scores of functional exercise compliance and the incidence of catheter-related thrombosis were compared between the 2 groups. The time average velocity of the axillary vein was compared 14 and 28 days after PICC catheterization,respectively. Results The total score of functional exercise compliance in the experimental group was higher than that in the control group,and the incidence of catheter-related thrombosis in the experimental group was significantly lower than that in the control group,and the differences were both statistically significant（P<0.05）. The time average velocity of the axillary vein in the experimental group was significantly higher than that in the control group 14 and 28 days after catheterization（both P<0.05）. Conclusion The intelligent grip strength system can significantly improve the compliance of PICC functional exercise in patients,effectively improve the upper limb venous blood circulation,and reduce the incidence of catheter-related thrombosis.