If a patient has a kidney injury, but might also be hypovolemic, don't use these.
Karol Mathews, DVM, DVSc, DACVECC, professor emeritus of clinical studies at Ontario Veterinary College at the University of Guelph, says that if a patient has a kidney injury, but might also be hypovolemic, you should not use synthetic colloids. Just go with fluid therapy, she advises.
Dr. Mathews also explains when blood transfusions or vasopressors might become necessary.