What is the critical blood pressure for patients with chronic kidney disease?

No one value : There is no one "critical" #. BP control in renal disease is critically important however. Talk to your physician for better understanding of this important issue & what the treatment goals are.

Best blood pressure: It depends on what is causing your ckd. Patients without diabetes should have their systolic BP < 140 mm hg. Those with diabetes should try to have a systolic of 130 mm hg. The lower your blood pressure, without symptoms of dizziness or weakness, the fewer complications one can expect to have. Discuss your particular case with your physician or have have him refer you to a nephrologist.