Which of the following is not an isotonic fluid? mcq given below:
Q. Which of the following is not an isotonic fluid?(a) 0.9% NS / |
| Do you Agree with Answer comment below |
💧 IV Fluids – Isotonic (Exam Focus)
Let’s understand this in a very simple way.
What are isotonic fluids?
These are IV fluids that have the same osmotic pressure as blood plasma.
👉 They do not cause major water movement into or out of cells.
Which among the following is NOT isotonic?
❌ Correct Answer: (d) Dextrose 5% in Normal Saline (D5NS)
Why D5NS is NOT considered isotonic in exams?
Although it acts close to isotonic initially, the presence of dextrose changes its behavior after metabolism.
👉 Therefore, many exam keys classify it as not truly isotonic.
Why other options are correct isotonic fluids?
- (a) 0.9% NS → ✔ Isotonic
- (b) RL → ✔ Isotonic
- (c) D5W → ✔ Often considered isotonic in bag (before metabolism)
Simple Exam Trick:
Dextrose + saline → changes fluid behavior → NOT pure isotonic (D5NS)
📌 Disclaimer: Classification may vary slightly across textbooks and exam keys.
💚 Exam Objective Nursing – Asha D
Concept clarity • Easy recall • Nursing success