➤ How is the BUN-to-creatinine ratio used to identify dehydration?
A BUN-to-creatinine ratio helps distinguish prerenal causes like dehydration. A ratio greater than 20:1 suggests prerenal azotemia from hypovolemia. Creatinine may remain near baseline while BUN rises, so a high ratio plus clinical signs of volume depletion supports dehydration. Always correlate with urine studies and vitals for accurate diagnosis.
Leave a Reply