A client was severely injured in a motor vehicle accident and lost a lot of blood. When the emergency personnel extracted the client from the wreckage, the blood pressure was 40/undetectable. Now the client is in the hospital with acute kidney injury as well as multiple broken bones and lacerations. "What is this 'prerenal' business that I keep hearing about?

profuse loss of blood. if an individual loses a certain amount of blood they can die (bleed to death). head injuries tend to bleed a lot; sometimes blunt force trauma to the head can result in internal hemorrhaging and swelling of the brain. In this case not knowing the condition of his brain with the information given the profuse loss of blood is the most likely answer.