What happens if you remove the needle before the tourniquet?
And the sooner you release the tourniquet, the better. If you can release the tourniquet after blood flow is established without compromising the draw, you reduce pressure to the vein and the risk of hematoma formation. 7. Why should the tourniquet be removed first before the needle? To prevent a hematoma:Remove the tourniquet before removing the needle. Use the major superficial veins. Make sure the needle fully penetrates the upper most wall of the vein.