Question

Haemodialysis is advised immediately when renal function falls below ________ %.

• A. \(5-7\)
• B. \(8-9\)
• C. \(10-12\)
• D. \(15-20\)

Hint:

Haemodialysis starts when the kidneys have almost completely failed.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Normal glomerular filtration rate is about \(125\ \text{mL/min}\).

Step 2: Recall the cut-off
When the function falls to roughly \(10\)-\(12\) percent of normal, the kidneys can no longer remove urea, excess water and ions. This is end-stage renal failure with uraemia.

Step 3: Conclusion
At this stage haemodialysis with an artificial kidney is started immediately.

Final Answer:
Haemodialysis is advised when renal function falls below 10 to 12 percent. \[ \boxed{\text{(C) }10-12} \]