Tendons are connective tissue-rich, resistant units responsible for the stability of joints, which transmit the strength of muscles to the bones. The extensor and flexor tendons on the hands and fingers provide all the movement needed for the hand to function smoothly. Their injury can be open and covered, caused by a sharp object, or by a spontaneous rupture that occurs when the fingers are suddenly abnormally strained. Injury of the tendon is usually easily recognizable, as some activity of the fingers of the hand is missing and deformity (curvature) is usually observed. Torn tendons can be repaired with sutures, but even after the repairing operation, the injured finger can be moved indefinitely.
Vascular damage can occur during open puncture, incision, bruising, or under compression. Closed injuries are most often direct injuries, e.g. they occur in connection with bone fractures and sprains. The injury is indirect if e.g. it is an overstretched rupture. Sometimes only one layer of the vessel wall is damaged, but this can already be a source of problem. If there is no palpable pulse, and if the limb is pale and cool, these can be symptoms of vascular injury of the hand. If vascular injury is suspected, care should be given as soon as possible because the risk of blood clots and other complications increases over time.
Electrical and thermic injuries
By thermic injuries, we mean burn and frostbite injuries. In case of burns, first aid, cooling with cold running water is very important. First-degree burns associated with erythema do not require special intervention other than analgesia and bandage. In case of second-degree burns with blisters, it may be necessary to open the blisters. In case of third-degree burns, it is always necessary to remove the damaged tissues.