Question: how and when to apply a tourniquet?
Answer: Step 1: Make sure your surroundings are safe, and keep yourself safe by wearing gloves. ... 
Step 2: Expose the open wound. ... 
Step 3: Apply firm, direct pressure to the wound site. ... 
Step 4: Choose a tourniquet. ... 
Step 5: Apply the tourniquet. ... 
Step 6: Assess for shock.