First, what is limb lengthening? Limb lengthening is based on the principle of cell regeneration under stress stimulation, and the application of osteotomy to form a “second growth line” in the femur or tibia. Next, who is limb lengthening suitable for? Limb lengthening indications: congenital deformity, trauma, tumor, infection and other causes of bone loss or limb inequality, as well as limb deformity caused by disease. Figure 1 shows the frame configuration of the limb lengthener of Wuyan Medical. Fig. 1 Limb (bone) lengthener frame Next, let’s look at the collected cases. The patient, a female, had a shortened limb deformity and was admitted to the second department of orthopedics at the National Rehabilitation Hospital. The director formulated a surgical plan based on relevant examinations and performed limb lengthening using an external fixator. Figure 2 shows the patient’s preoperative appearance. Figure 2 shows the patient’s pre-operative appearance. Limb lengthening can generally be accomplished with 2-500px of bone lengthening. Figure 3 shows the patient’s appearance one month after surgery. Figure 3 shows the patient’s appearance one month after surgery Figure 4 shows the patient’s appearance one month after surgery Postoperative care: 1.Prevent needle tract sensation, keep the skin around the needle hole clean and dry. 2.Check the tightness of the steel needle regularly. 3.Postoperatively, put the affected limb slightly too high and put a thin pillow on it. 4.Closely observe the blood flow of the distal end of the affected limb and the sensation and movement of the toes. 5.Start 7 days after surgery, twist the scale on the lengthening rod every day, each lengthening should not exceed 1.0mm, the speed of lengthening depends on the patient’s tolerance. 6, massage, functional exercise, gradual, 3-4 times daily activities, not fast and violent.