Anesthesia Leak Test and Repair
Model Range VMS, VMS Plus, and VMC
Do not activate the oxygen flush during any part of this leak test.
To perform leak test
1.Close APL (Scavenging /Adjustable Pressure Limiting) valve by turning knob clockwise.
2.Place thumb over patient connection of breathing circuit Y.
3.Remove breathing bag and cover bag port opening. Use the palm of the hand that is covering Y.
4.With oxygen 50-55 PSI (3.4-3.8 Bar) supplied to anesthesia machine, slowly open flowmeter to register 30cm H20 on anesthesia machine pressure gauge.
5.Turn off flowmeter when pressure reaches 30cm H20. If pressure holds steady, the system is leak free but if pressure drops, proceed to step 6.
6.Slowly open flowmeter until pressure stabilizes at 30cm. H20 setting. This determines the magnitude of the leak. If leak rate is greater than 300ml/min, proceed to step 7.
7.Refer to: What if machine leaks?
8.Replace reservoir bag. Repeat step 2 and steps 4 thru 6. This will determine the integrity of breathing bag.
9.Open APL Valve at end of Leak Test Procedure by turning knob counter clockwise.
What if Machine Leaks?
1.Breathing Bag - If leak occurs, replace.
2.Breathing Circuit - Install new breathing circuit or obstruct inhalation / exhalation openings to determine if leak originates from breathing circuit.
3.Vaporizer Fittings - Verify fittings and tubing are securely attached.
4.Canister Gaskets - Check for loose absorbent grains between canister housing gaskets.
5.Verify Canister is seated properly.
6.Safety Valves - Remove valve and obstruct opening to determine if leak originates from negative pressure relief valve. Check the o-ring under valve for damage.
7.APL Valve - Remove valve and obstruct opening to determine if leak originates from APL valve. Check the o-ring under valve for damage.
8.O-Rings under chrome retaining rings. Check the o-rings for damage.
Model Range VME and VME2
| Breathing Bag | |
|---|---|
| Patient Weight | Bag Size |
| 15 lbs or less (7kg) | 500 ml |
| 15-30 lbs (7-14 kg) | 1 liter |
| 30-60 lbs (14-27 kg) | 2 liter |
| 60-100 lbs (27-45 kg) | 3 liter |
| 100 + lbs (45 + kg) | 5 liter |
Do not activate the oxygen flush during any part of this leak test.
To perform leak test
1.Close APL (Scavenging /Adjustable Pressure Limiting) valve by turning knob clockwise.
2.Place thumb over patient connection of breathing circuit Y.
3.Remove breathing bag and cover bag port opening. Use the palm of the hand that is covering Y.
4.With oxygen 50-55 PSI (3.4-3.8 Bar) supplied to anesthesia machine, slowly open flowmeter to register 30cm H20 on anesthesia machine pressure gauge.
5.Turn off flowmeter when pressure reaches 30cm H2O. If pressure holds steady, the system is leak free but if pressure drops, proceed to step 6.
6.Slowly open flowmeter until pressure stabilizes at 30cm. H2O setting. This determines the magnitude of the leak. If leak rate is greater than 300ml/min, proceed to step 7.
7.Refer to: What if machine leaks?
8.Replace reservoir bag. Repeat step 2 and steps 4 thru 6. This will determine the integrity of breathing bag.
9.Open APL Valve at end of Leak Test Procedure by turning knob counter clockwise.
What if Machine Leaks?
1.Breathing Bag - If leak occurs, replace.
2.Breathing Circuit - Install new breathing circuit or obstruct inhalation / exhalation openings to determine if leak originates from breathing circuit.
3.Vaporizer Fittings - Verify fittings and tubing are securely attached.
4.Canister Gasket - Check for loose absorbent grains between canister housing gasket.
5.Verify Canister is seated properly.
6.APL Valve - Remove valve and obstruct opening to determine if leak originates from APL valve. Check the o-ring under valve for damage.
7.O-Rings under dome and clamp. Check the o-rings for damage.
