Fracture of the base of the first metacarpal
Introduction
Introduction to the first metacarpal base fracture Refers to the fracture of the first metacarpal at 1 cm, mostly transverse or comminuted fracture. The proximal end of the fracture was pulled by the thumb long abductor muscle and displaced to the dorsal side of the temporal side. The distal part of the fracture was pulled by the flexor hallucis longus and the adductor pollicis muscle, and was displaced to the ulnar side of the volar side. The temporal side is deformed into an angular shape. basic knowledge The proportion of illness: 0.02% Susceptible people: no specific people Mode of infection: non-infectious Complications: joint dislocation
Cause
The cause of the first metacarpal base fracture
Trauma, at the elbow, the ulnar nerve can be directly traumatized or fractured for fracture and dislocation. If you don't pay attention to the protection during general anesthesia, the arm will hang over the operating table, which may cause paralysis due to compression. In the cervical rib or anterior scalene muscle. Syndrome, with the most damage to the ulnar nerve.
Prevention
First metacarpal base fracture prevention
Try to avoid trauma.
Complication
First metacarpal base fracture complications Complications, joint dislocation
Will merge the dislocation of the wrist joint.
Symptom
The first metacarpal base fracture symptoms Common symptoms Joint swelling swelling of the wrist and palm flexion...
Local swelling and tenderness after injury, limited thumb and abduction movement, and metacarpophalangeal joints and knuckles are still active.
Examine
Examination of the first metacarpal base fracture
X-ray examination, physical examination, and electromyography if necessary.
Diagnosis
Diagnosis and diagnosis of the first metacarpal base fracture
Different from the fracture of the metacarpal neck and the fracture of the metacarpal shaft.
