Question

why is it important to know a persons rhesus factor before a blood transfusion? a patient who is rh+ can receive only rh+ blood. a patient who is rh+ can receive only rh- blood. a patient who is rh- can receive only rh+ blood. a patient who is rh- can receive only rh- blood.

Explanation:

The Rh - factor is an important blood - group antigen. A person with Rh - negative blood has antibodies against Rh - positive blood if exposed to it. So, an Rh - negative patient can only receive Rh - negative blood to avoid an immune reaction. An Rh - positive patient can receive both Rh - positive and Rh - negative blood. Knowing the Rh - factor before a blood transfusion is crucial to prevent transfusion reactions, which can be life - threatening.

Answer:

A patient who is Rh− can receive only Rh− blood.