Which of the following is a normal MAP range for renal disease patients?

• A. 50-60 mmHg
• B. 60-70 mmHg
• C. 70-80 mmHg
• D. 80-90 mmHg

Answer: (B)

MAP reflects the driving pressure for organ perfusion, including the kidneys. In patients with renal disease, preserving renal perfusion without pushing blood pressure too high is important, because the kidneys can be more vulnerable to fluctuations and autoregulation may be impaired. A target around 60–70 mmHg provides enough perfusion pressure to support renal blood flow while avoiding the risks of higher pressures that can worsen hypertension-related damage or precipitate bleeding during procedures. Fluctuations below about 60 mmHg raise the risk of renal ischemia and acute injury, while consistently higher pressures (like 80–90) aren’t required and can impose unnecessary cardiovascular strain. Therefore, 60–70 mmHg is the commonly cited target range for renal disease patients.