What are the symptoms of thumb ligament injury?

summary

The most common ligament injury of the hand is the ulnar collateral ligament injury of the metacarpophalangeal joint of the thumb, which often leads to the loss of thumb opposition force and fine pinch ability. Also known as ski thumb. The metacarpophalangeal joint of the thumb is a single hinged joint with an average flexion and extension activity of 10 °～ sixty °。 The rotation axis of the joint is eccentric, and there are two strong collateral ligaments on both sides of the joint capsule, namely the proper collateral ligament and the collateral ligament, to maintain the passive stability of the joint. The proper collateral ligament runs from the dorsolateral side of the first metacarpal head to the far volar side and ends at the lateral tubercle at the base of the proximal phalanx. It is 4-8 mm wide and 12-14 mm long. It can bear an external force of 30-40 kg. From the volar side of the proper collateral ligament above the first metacarpal condyle, the proper collateral ligament partially crosses the volar sesamoid bone and becomes tense when the volar fibrocartilage is in the joint extension position. Now let's talk about the symptoms of thumb ligament injury?

What are the symptoms of thumb ligament injury?

1. There is a typical history of trauma, pain and swelling of the injured side of the thumb metacarpophalangeal joint, most of which are accompanied by local subcutaneous cyanosis, and the movement is obviously limited. Local obvious tenderness, especially the lateral movement of metacarpophalangeal joint can cause severe pain.

2. Generally, the metacarpophalangeal joint of the thumb turns outward about 25 °， It is a reliable sign of collateral ligament rupture. If the joint can roll over in the extension position, the metacarpal plate and collateral ligament have been broken; For example, slight flexion of the joint valgus about 20 °， Only the collateral ligament was injured. In patients with old ligament injury, the skin nerves walking in the scar area often cause radiation pain.

3. The size and position of the bone can be determined by taking the anteroposterior and lateral X-ray film of the metacarpophalangeal joint of the thumb with avulsion of the bone ligament, which is the choice of clinical treatment.

matters needing attention

When there is no excessive eversion or instability of the metacarpophalangeal joint of the thumb due to simple contusion, sprain or partial ligament rupture, the whole thumb and the interphalangeal joint can be fixed with plaster support for 3 weeks. In fact, ligament strain is different from fracture, it doesn't need too much dietary supplement. Because most of the injuries are sports injuries, so the most important is rest, braking