Watched an episode of Arctic Air, (season three episode six), where they are practicing and hoping to become a licensed search and rescue airline.
Anyhow; two hikers gets attacked by a grizzly bear and whilst one get killed the other manages to throw himself off a cliff and ending up with his leg pinched under a rock. He also has big lacerations on his chest from the grizzly. Finally he manages to send a distress signal.
Though not licensed a team travels out to asses the situation. As they find the wounded climber they start to help. First they clean the lacerations by pouring alcohol over them, and then lay some bandages on top. After a while the injured man complains he is thirsty, and they give him water.
TLDR;/Question If I recall correctly one should not give water to a trauma patient. They can have internal bleeding and/or, as in this case big external wounds which likely has caused quite some blood loss.
Liquid will, IIRC, cause some bad effect on the re-production on blood, and might also affect existing blood.
Am I correct in this? If so; what happens and why should one not give liquid to the patient?
Guess there could be some situations where liquid is proper. E.g. patient has been laying in exposure to sun for N hours and dehydration might also cause ill effects... ? (Kidneys, blood-pressure, plasma?) But that might be a negative in any case if one suspect internal bleeding?