先天性远端尺桡关节半脱位

　　先天性远端尺桡关节半脱位是由桡骨远端骨骺生长紊乱所致，主要是内侧1/3骨骺，因生长减慢、过早闭合而致桡骨缩短，使下尺桡关节渐向掌侧脱位，手向掌侧和尺侧偏斜。因尺骨仍为直线方向生长，尺骨下端顶出于皮下，而桡骨下端相对缩短。

　　先天性远端尺桡关节半脱位儿童患者应加强功能锻炼或用支具保护以免畸形进一步发展。对畸形较轻，疼痛及功能影响不重者，不必处理。本病一般不会并发严重疾病和症状。

　　先天性远端尺桡关节半脱位多见于女性。患者于发育期间显现症状，随着年龄增大畸形越来越重，局部疼痛也将加剧。典型的畸形是尺骨茎突突起于腕背侧及尺侧，与桡骨茎突处于同一平面或更长一些。腕关节向掌侧、桡侧移位，活动受限，尤以背屈和尺偏为甚。前臂的旋转功能可不同程度受限，但以旋后功能受限较严重。

　　Congenital proximal radioulnar joint subluxation belongs to congenital malformation. The prevention of congenital malformation is divided into the following aspects:

　　1、The pregnant woman should avoid fever and colds in the early stages of pregnancy. High fever can cause fetal deformity and is related to the sensitivity of pregnant women to high fever and other factors.

　　2、The pregnant woman should avoid close contact with cats and dogs. Bacteria-carrying cats are also a significant source of infectious diseases that threaten fetal deformity.

　　3、The pregnant woman should avoid heavy makeup every day. Toxic substances such as arsenic, lead, and mercury in cosmetics can affect the normal development of the fetus.

　　4、The pregnant woman should avoid emotional stress during pregnancy. When the pregnant woman is emotionally stressed, adrenal cortical hormones may hinder the integration of embryonic tissues. If it occurs during the early stages of pregnancy...3months, it can cause fetal deformity.

　　5、The pregnant woman should avoid drinking. Alcohol can enter the developing embryo through the placenta and cause serious harm to the fetus.

　　In the X-ray of patients with congenital proximal radioulnar joint subluxation, the styloid process of the ulna is lower than that of the radius, and the entire carpal bone moves towards the ulnar side. The rounded top is in the shape of a peak, with the top being the lunate bone. The entire row of carpal bones moves towards the ulnar side.

　　Patients with congenital proximal radioulnar joint subluxation should improve their nutrition, eat more protein-rich foods such as fish, eggs, and dairy products. Drink plenty of water, eat more vegetables and fruits. In addition, patients should avoid spicy and irritating foods, smoking, and alcohol.

　　For congenital proximal radioulnar joint subluxation, in cases where the deformity is mild, pain and functional impairment are not severe, no treatment is necessary. Children with growth periods should strengthen functional exercises or use supports to protect them from further deformation. Orthopedic surgery should be performed after the growth of the epiphysis stops and the deformity takes shape.