1案例　　某女， 48岁，农民。某日因故与他人发生口角扭打，扭打中被对方抓住左手指向手背部猛烈反折，双方同时倒地，某女立即感到左手环指剧烈疼痛、麻木，肿胀弯曲畸形。医院检查：左手环指第二指节肿胀畸形，压痛，有骨擦感，指端血循环好。立即在局部麻醉下行手法复位， 1 case a woman, 48 years old, farmer. One day due to an accidental twisting with others, twisting in the other hand to seize the left hand violently folded back, the two fell to the ground at the same time, a woman immediately felt the left wrist ring means severe pain, numbness, swelling and bending deformity. Hospital examination: the second ring refers to the second knuckle swelling swelling, tenderness, a sense of bone rub, finger blood circulation is good. Immediately under local anesthesia practices reset,