An Open Chest Wound (Sucking Chest Wound)
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.
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.
Coughing up blood, Sucking or hissing sound coming from the wound, frothy blood coming from the wound.
The sealing material should extend least 2 inches past the edge of the wound.
The scientific name for scab is "crust." It is a protective covering that forms over a wound or lesion during the healing process.
bandage
bandage
Dressing
Dressing!
Dressing!
usually called a "dressing".
It is called a scar or a scab.
Dressing
That would be called a bandage.
A scab forming over a wound is a physical change. It occurs due to the process of coagulation, where blood cells and proteins solidify to form a protective layer over the wound.
dressing