Abstract: Objective To investigate the effect of modified Kessler suture,early rehabilitation combined with platelet rich plasma (PRP) on functional rehabilitation of patients with acute Achilles tendon rupture (AATR).Methods From April 2021 to July 2023,92 patients with AATR admitted to our hospital were gathered and using a random number table method,assigned into a control group (n=46) and an auxiliary PRP group (n=46).The efficacy,Achilles tendon healing,ankle-hindfoot condition,ankle mobility,and postoperative complications were compared between the two groups.Results The total effective rate and excellent rate of Achilles tendon healing in the auxiliary PRP group were 95.35% and 100%,respectively,which were higher than the control group's (79.55% and 88.64% )(P<0.05).One year after surgery,the AOFAS scores (93.47±3.19,90.45±5.16) of both groups were higher than that at 6 months after surgery (81.21±8.35,76.52±9.06) (P<0.05).The angles of dorsiflexion [(20.78±2.67) °,(18.26±2.33) °] and plantarflexion [(42.52±5.61) °,(38.73±4.24) °] of the affected ankle were greater than at 6 months after surgery [(13.03±2.15) °,(11.16±2.29) °,(32.56±3.35) °,(29.79±3.58) °] (P<0.05).Six months after the operation,the AOFAS scores of both groups were higher than those before the operation (44.45±6.79,44.21±8.36).The dorsiflexion of the affected ankle [(10.23±1.21)°,(10.20±1.08)°] and the plantar flexion Angle [(19.56±2.43)°,(20.03±2.58)°] were all greater than those before the operation (P<0.05).In addition,the AOFAS scores of the auxiliary PRP group were higher than those of the control group at 6 months and 1 year after surgery (P<0.05),and the angles of dorsiflexion and plantarflexion of the affected ankle were greater than those of the control group (P<0.05).The total incidence of postoperative complications was not greatly different between the auxiliary PRP group (4.65%) and the control group (11.36%) (P>0.05).Conclusion The application of modified Kessler suture and early rehabilitation combined with PRP treatment can greatly improve the efficacy of Achilles tendon and effectively promote the recovery of ankle-hind foot function in AATR patients.

Key words: early rehabilitation, platelet rich plasma, modified Kessler suture, acute Achilles tendon rupture