In combat. You first have to make sure the scene is safe. Move the wounded only if a life threatening situation exist. Once the person is secure and you have assessed the person needs help, and doesn't have a broken neck or some more serious affliction. Cover the chest wound with some sterile non porous material to act as a barrier to stop the flow of blood exiting the wound. Use a dressing to help control the bleeding. And use a bandage or dressing to hold it in place. Then go find professional medical help. If there are no proper medical or sanitary supplies near you. Improvise. Use your ID to seal the wound and strips of your shirt to make a bandage or a dressing.
If you are not sure if a chest wound has penetrated the chest wall completely, treat the wound as though it were an open chest wound.
An Open Chest Wound (Sucking Chest Wound)
the edges of the sealing material for an open chest wound should extend how far past the edge of the wound?
Umm, well if it was an open chest wound..there would be an obvious HOLE/CUT in your chest. you would be able to see it.
pain, blood coming from the chest,
To treat sucking chest wounds, you should use an occlusive dressing to prevent air from entering the wound.
allow the victim to assume the position easiest for breathing, and observe/treat for shock.
Coughing up blood, sucking or hissing sounds coming from a chest wound, frothy blood appearing from air bubbles coming from the wound
There shouldn't be a knot to tie. The treatment for an open chest wound is to put a piece of plastic over it and tape it down on the sides so that air cannot get in or out of the wound. There's nothing to tie down anywhere in that. You could be thinking of flail chest which has more to do with broken bones then an open chest wound. As an army medic I find your question soul crushingly confusing.
just sew it
Um, a gaping hole in your chest Blood is a good indicator. A gaping hole in the chest.
All of the above sabc