Ender Needle Fixation

Femoral neck fractures are usually fixed by triangular nails, but there are certain deficiencies, which are simple and not pressurized. When slamming the needle, the femoral head may be pushed open or rotated. Switching to a compression screw can be improved, but it is still not suitable for comminuted fractures. To this end, Ender (1969) created a flexible curved steel needle for intramedullary fixation for the treatment of intertrochanteric fractures, the expansion of the application of femoral neck, femoral shaft and tibia fractures, have achieved good results. The advantages are: the method is simple, the fixation is reliable, the stability is good, no external fixation is needed, and the joint activity is less affected. The curvature of the needle can be adjusted, the curved structure can control the rotation and prevent shortening, the damage is small, and it can also be used for open fracture, without peeling the periosteum and expanding the medullary cavity, and the blood is not damaged, and the bone healing is beneficial. The needle has an arc shape with a diameter of 3 to 4 mm. The length and the curvature have different specifications. The needle end is inwardly blunt-shaped, the needle tail is flat, and the tail end has a hole for removal. Also made into a length of 40cm, too long to be cut off. Treatment of diseases: femoral neck fracture Indication Ender needle fixation is suitable for: 1. Femoral neck fractures, including crushed, under-head and open. 2. Femoral intertrochanteric fracture, femoral shaft, humeral shaft and other fractures. Contraindications 1. Severely comminuted femoral neck fracture with more bone loss. 2. Severe osteoporosis. 3. There is an infection at the entrance of the needle. Preoperative preparation 1. First bone traction to restore the length of the injured limb. 2. Prepare various specifications of the Ender needle. Surgical procedure 1. The longitudinal incision is made 5cm on the femoral condyle and the length is 5cm. The skin is cut. Make a 1.5cm × 1cm bone groove on the inside of the lower end of the femur, deep into the medullary cavity, and insert the Ender needle. After entering the base of the femoral neck, adjust the position of the needle tip and tap a few centimeters to make the needle tip 1 to 2 mm below the cartilage surface. 2. Generally, 3 pieces are scored, which are respectively inserted into the inner rotation position, the outer rotation position and the neutral position to ensure that they are fan-shaped in the femoral head.

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