Anaesthesia All of the following are used to maintain proper oxygen flow to the patient except: A Placement of nitrogen flowmeter downstream of the oxygen flowmeter B A propoionater between N2 and 02 control valve C Different pin index for nitrogen and oxygen D Calibrated oxygen concentration analyses 💡 Explanation All of the following are used to maintain proper oxygen flow to the patient except: ✓ Correct Answer: A. Placement of nitrogen flowmeter downstream of the oxygen flowmeter