After the developmental hip dislocation (DDH) closed reset plaster pants are fixed, related instructions and precautions: 1, pay attention to keep the child in a dry and cool environment to avoid excessive sweating, especially in hot and humid areas; 2, the outer layer of plaster is polymer resin material can be waterproof, but the inner layer of socks and cotton lining of plaster pants is not waterproof, if not properly managed, the child urinates when wetting the plaster The inner liner can easily lead to skin eczema. Therefore, the diaper must be stuffed into the plaster pants, supine in front (perineum), prone in the back (buttocks), choose a narrow diaper or pad, you can use an elastic soft ruler to help stuff it; 3, supine padding double calves to let the trunk flat, to avoid the child’s lumbosacral discomfort due to the natural sagging of the lower limbs after the fixation of the plaster pants; 4, for the hip joint, the hip joint needs to be flexed enough after reset (flexion of the hip Therefore, after the plaster pants are fixed, the child’s body is upright and the hip is sunken to help maintain the hip flexion angle; similarly, when holding the child, let the child stand upright and avoid reaching under the plaster pants to hold the child’s buttocks to avoid reducing the hip flexion angle; 5. Therefore, mild “micro-movement” of the hip joint is acceptable after resetting, so don’t be too nervous, but try to avoid letting the child stand; 6, the cast often shows “asymmetry on both sides”, mainly because the child The need for stability of the hip joint after resetting. In order to maintain the stability of the hip joint after reset and to avoid the head of the femur from coming out of the acetabular fossa again, the cast will be fixed asymmetrically, and the original dislocated side of the hip joint will be especially strengthened (more inward and rearward to hold the greater trochanter). 7, the edge of the plaster or the surface of the rough places that may lead to the child’s skin abrasion can be pasted with medical rubber plaster; 8, pay attention to avoid the child put toys and other foreign objects into the plaster pants.