The answer is half an hour in winter and half a minute every hour in summer before tying up again.
It should be noted that if a patient suffers from severe bleeding, he must be sent to the hospital for treatment while applying a tourniquet.
(1) The tourniquet should be applied at the proximal end of the wound, as close to the wound as possible. The forearm and calf are not suitable for applying a tourniquet, so there are two bones juxtaposed, and the blood flow can pass through the bone gap, so the hemostatic effect is not good. To stop bleeding, do not stick in the middle 1/3 of the upper arm. To prevent strangulation of nerves.
(2) Before applying a tourniquet, a triangle or towel should be placed on it to prevent the tourniquet from directly contacting the skin and causing damage to the skin.
(3) When tying a tourniquet, the rubber tube should be stretched appropriately, wrapped around the limb 2-3 times, and then fixed. The elastic retraction of the rubber should be used to compress the arteries and veins. The bandage should not be too tight or too loose until the distal artery pulse disappears.
(4) Try to shorten the time of applying the tourniquet as much as possible, preferably about 1 hour, and the longest should not exceed 4 hours.
(5) During the period of using the tourniquet, the tourniquet should be loosened every half hour to one hour. When relaxing, finger pressure can be used to temporarily stop bleeding to relieve ischemia of local limbs. After 1-2 minutes of loosening, immediately tie the tourniquet on a slightly higher surface. Do not tie the tourniquet repeatedly on the same site.
(6) When loosening the tourniquet, the movement should be slow to prevent a sudden increase in blood flow in the affected limb, which may easily damage peripheral blood vessels, affect the redistribution of blood throughout the body, and reduce blood pressure.
(7) During the escort process, the patient with a tourniquet should clearly mark the injury and indicate the specific time when the blood flow was blocked, so that others can loosen the tourniquet on time and prevent the limb from blocking the blood flow for a long time, causing serious tissue damage. Avascular necrosis.
(8) When using a tourniquet, pay attention to keeping the limbs warm. Because the blood circulation of the injured limb is blocked, the cold resistance is low and frostbite is prone to occur.
