Carpal shotgun deformity is a deformity specific to Coles fractures, which occur in the cancellous part of the bone within 2 to 3 cm of the lower radius. It is one of the most frequent fractures in the human body, accounting for 10% of all fractures, with the elderly and adults accounting for the majority of fractures. In young adults, the same violence can cause separation of the lower radial epiphysis. If the patient falls in the dorsal wrist extension position and lands on the palm of the hand, he feels severe pain in the wrist and does not dare to move, swelling is especially obvious with local swelling, sometimes subcutaneous bruising is visible, the fingers are in a semi-flexed resting position and does not dare to make a fist, and requires the healthy hand to support the affected hand to alleviate some pain, if the proximal end of the fracture presses the median nerve, there is numbness of the fingers and other manifestations of median nerve dysfunction, and the typical signs of a Colley fracture are as follows. 1. silver fork deformity The distal end of the fracture is displaced dorsally along with the hand, and there is a depression on its proximal side. The distal end of the fracture together with the hand is displaced to the radial side, and the axis of the middle finger is not in the same plane with the axis of the radius. 3.Straight ruler test When normal, put the straight ruler on the ulnar side of the wrist, the ulnar styloid process is more than 1cm from the straight ruler, and when the lower end of the radius is fractured, the ulnar styloid process can be in contact with the straight ruler. 4, ulnar styloid process and radial styloid process linear relationship After the fracture of the lower radius, the ulnar styloid process and the radial styloid process are several in the same line, normally the radial styloid process is more than the ulnar styloid process to the distal side by 1 to 1,5 cm. X-ray photography, the radius is transected at about 3,0 cm from the articular surface, the distal fracture segment is displaced to the radial side on the orthopantomograph, there can be insertion with the proximal fracture segment, and the distance of the lower ulnar radial joint increases (separation). The lower radial articular surface tilt is reduced to the ulnar side, normally 20° to 25°, and may decrease to 5° to 15° or even disappear after fracture; on the lateral view, the distal radius is displaced to the dorsal side, and the articular surface palmar tilt angle is reduced or disappears, normally 10° to 15°. In the elderly, the distal fracture segment may be comminuted.