Abstract:Objective To observe the effect of minimally invasive Kirschner wire tension band internal fixation assisted by arthroscopy on bone metabolism and humoral immune function in patients with patella fractures.Methods Sixty-one patients with patella fractures from March 2017 to August 2019 were selected and divided into arthroscopy group (n = 31) and traditional group (n = 30) by random number table method. The traditional group underwent traditional open reduction Kirschner wire tension band internal fixation, and the arthroscopic group underwent arthroscopic-assisted minimally invasive Kirschner wire tension band internal fixation. The operation conditions and complications, serum humoral immune function [immunoglobulin G (IgG), immunoglobulin A (IgA) and immunoglobulin M (IgM)] before operation, 1 day and 3 days after operation, bone metabolic indexes [tartrate-resistant acid phosphatase-5b (TRAP-5b), bone-specific alkaline phosphatase (BAP) and osteocalcin (OCN)] levels before operation, 2 weeks and 1 month after operation of the two groups were compared. After 6 months of follow-up, the knee function score (KSS), visual analogue scale (VAS) and knee range of motion of the two groups before operation, 3 months and 6 months after operation and the excellent and good rate of knee joint range of motion after 6 months were counted.Results The intraoperative blood loss was lower in the arthroscopy group than that in the traditional group, and the hospitalization time and fracture healing time were shorter (P < 0.05); the levels of serum IgG, IgM and IgA decreased in the two groups on the 1st and 3rd day after operation, but the arthroscopy group was higher than the traditional group (P < 0.05); The levels of serum TRAP-5b in the two groups after 2 weeks and 1 month after operation were lower than those before the operation, and the arthroscopy group was lower than the traditional group, serum BAP and OCN levels were higher than before surgery, and the arthroscopy group was higher than the traditional group (P < 0.05); After 6 months of follow-up, no cases were lost to follow-up, and the KSS scores of the two groups at 3 and 6 months after operation were higher than those before the operation, and the arthroscopy group was higher than the traditional group, the VAS score was lower than before surgery, and the arthroscopy group was lower than the traditional group (P < 0.05). The excellent and good rate of range of motion of the knee joint in the arthroscopy group was 90.32% higher than that in the traditional group was 70.00% (P < 0.05).Conclusion The treatment of patella fractures with minimally invasive Kirschner wire tension band internal fixation assisted by arthroscopy can effectively reduce intraoperative blood loss, reduce the damage of humoral immune function, shorten the length of hospital stay, promote fracture healing, reduce the degree of pain, and improve knee function and range of motion.