Hey, that's the way the faith goes.
JWs have hospitals and doctors that will help them get the best blood-less treatments available to mankind. However, if it comes to blood or death, many will choose death rather than betray their faith.
Extremely seldom cases comes to that point, though. A concious, faithful JW takes the best care of him/herself possible and seeks the best medical treament in order to avoid reaching such point.
In the majority of cases, JWs or otherwise, even with the blood having been applied the person would've died anyway.
DY