Abstract: Objective To analyze the influence of blood flow restriction training on postoperative muscle strength and joint function in patients with distal radius fractures.Methods This study was a prospective one,taking 60 postoperative patients with distal radius fractures as the research subjects.All of them received rehabilitation treatment in our hospital from October 2021 to October 2024.The research subjects were divided into the control group and the observation group according to the simple randomization method,with 30 cases in each group.The former was given conventional rehabilitation treatment,while the latter was given blood flow restriction training on the basis of the control group.Both groups were treated continuously for 4 weeks,and both were followed up for 3 months after the treatment.The Visual Analogue Scale (VAS),the circumference of the forearm and wrist joint,muscle strength,the score of the Patient Assessment Scale for Wrist Function (PRWE),the score of the Disability Assessment Scale for Arm,Shoulder and Hand (DASH),serum D-dimer,Fracture Healing Imaging (RUSS) score and safety assessment were compared between the two groups of patients.Results At both 2 weeks and the end of treatment,the VAS scores in the observation group were 1 (0,2) and 0 (0,1),respectively,significantly lower than those in the control group [3 (1,4) and 1 (0,2)] (all P<0.05).Three-point pinch strength,grip strength,wrist palmar flexion,and wrist dorsal extension in the observation group were (0.46±0.11) and (0.70±0.13),(0.40±0.12) and (0.72±0.14),(0.52±0.13) and (0.71±0.15),and (0.51±0.14) and (0.73±0.15),respectively,all significantly higher than those in the control group [(0.40±0.09) and (0.63±0.12),(0.34±0.10) and (0.64±0.13),(0.39±0.11) and (0.53±0.14),(0.36±0.12) and (0.53±0.13)] (all P<0.05).Serum D-dimer levels in the observation group were at the two time points,which did not differ significantly from those in the control group (both P>0.05).At the end of treatment,the differences in wrist joint and forearm circumference in the observation group were (0.58±0.15) cm and (0.21±0.06) cm respectively,which were lower than those in the control group [(1.45±0.42) cm and (0.48±0.14) cm] (P<0.05).At the end of treatment and at the final follow-up,the PRWE scores in the observation group were (7.85±2.54) and (2.14±0.68),and the DASH scores were (11.35±4.08) and (3.45±1.02),all significantly lower than those in the control group [(14.45±3.25) and (4.18±1.05) for PRWE;(19.65±4.12) and (7.36±2.43) for DASH] (all P<0.05).No significant between-group difference was observed in RUSS scores at either time point (P>0.05).Conclusion For patients with distal radius fractures,the application of blood flow restriction training combined with traditional rehabilitation training after surgery is more conducive to improving their muscle strength and joint function,reducing the degree of pain and limb swelling,and the fracture healing is good.

Key words: blood flow restriction training, fracture of distal radius, surgical internal fixation treatment, muscle strength, joint function