To observe the effect of supraorbital approach with intramedullary nailing on knee joint function and complications in patients with proximal humerus fracture.

Seventy-two patients with proximal humeral fractures admitted to our hospital were enrolled in the study. According to the principle of randomized control, they were divided into an observation group and a control group, with 36 cases in each group. The control group underwent open reduction and internal fixation, and the observation group intramedullary nailing. The clinical indicators, knee function, and postoperative complications were compared between these two groups.

The operation time, time for walking recovery, and intraoperative bleeding volume were lower and the Lysholm knee joint function score was higher in the observation group than in the control group (all P<0.05). There was no statistical difference in the incidence of postoperative complications between the two groups (P>0.05).

Intramedullary nailing for proximal humeral fracture has a significant effect, and is helpful to promote the recovery of knee joint function, with few complications and high safety.

Proximal humerus fracture; Supraorbital approach intramedullary nailing; Knee joint function; Complications