Final answer:
Systemic blood pressure should indeed be above 60 for proper filtration, and this is true. If red blood cells burst after an injection labeled as isotonic solution, the solution was actually hypotonic, not isotonic. In emergencies with severe bleeding and no time for blood typing, O negative blood, the universal donor, is transfused.
Step-by-step explanation:
At the same time that Amy should scan the body for life-threatening bleeding, it is indeed true that systemic blood pressure must stay above 60 to ensure proper filtration.
If a doctor injected a patient with what was labeled as isotonic saline solution and the autopsy showed red blood cells had burst, it indicates that the solution was likely hypotonic, not isotonic, as pure water or hypotonic solutions can cause red blood cells to burst due to osmotic pressure.
Following a severe motor vehicle accident where a patient has critical injuries and severe bleeding, universal donor blood, O negative, is typically transfused because it is the most likely to be compatible with any blood type in emergency situations where there is no time to determine blood type.