They can at least stop the bleeding, and the pain, I think. This's--a little past first-aid kit territory.

[She pulls tighter on the belt until it holds steady, digging into the sodden cloth and discolored skin and catching a bit at the open wound, since it's kind of difficult to avoid. She's finally able to force the buckle through the belt before getting a better look at his neck instead--has she clogged one leak only to expose another]