Blood Loss and Transfusion
Bleeding and blood volume are two separate problems.
An active wound that is still bleeding lowers your circulating blood
over time. Stopping that bleeding -- through treatment, a tourniquet,
or the body's own natural clotting -- stops any further loss, but it
does not put back blood that is already gone.
Severe blood loss can leave someone unconscious even after the
bleeding itself has completely stopped. A wound can be closed and the
patient can still be in real danger from how much blood they already
lost getting there.
Transfusion
inject transfusion <target>
inject iv <target>
inject blood <target>
A transfusion restores circulating blood. It does not close wounds and
does not reduce how badly someone is bleeding -- if the patient is
still bleeding, blood you just restored can be lost again.
Transfusion also cannot undo some other independently fatal problem.
Restoring blood volume does not fix a ruined heart, a collapsed lung,
or anything else that is killing the patient on its own.
Treating someone else
Treating a conscious target who has not trusted you falls under the
same rules as other medical treatment -- they need to trust you to
heal them first, or be unconscious, dead, or restrained. See help
trust.
See also:
help medical system
help death and unconsciousness
help cpr