[Video] Anesthesia Machine Preoperative Check

1st Check:

• Wall Connections
• Pressure Gauge.
• Ports Fitness (Press & Twist).

Keep (After each test):

• The vaporizers closed.
• The Flow-meters closed.

1. Flow-meters:

   • Bobbins for stickiness (Open and Close).

2. Vaporizers:

   • Fixed in position.
   • Well locked (back locker).
   • Anesthetic tank cover is well closed.
   • Anesthetic tank fluid level.
   • Dial for stickiness.
   • Interlock if two vaporizers (open both alternatively).

3. Common Gas Outlet:

   • O₂ Flush Button:
     
     • Stickiness (Press and release).
     • Gas delivery at the common gas outlet.
   • Leak:
     
     1. Set the flow-meter at 5-6 L/Min.
     2. Keep the vaporizers closed.
     3. Press the flush button.
     4. Obstruct the common gas outlet.
     5. Watch the flow-meter bobbins for downward descent.
     6. Open the vaporizers & repeat.

4. Circuit (for leak):

   1. Turn on the ventilator on volume controlled mode.
   2. Watch the pressure curve on the screen for the peak pressure and plateau time.

5. Auto-PEEP:

   1. Set the flow-meters to 5-6 L/Min.
   2. Watch the pressure curve baseline on the ventilator screen.

6. Valves:

   • Pressure release valve.
   • Unidirectional valves.

7. Pillows:

   • Stickiness:
     Watch them expanding and collapsed freely while the ventilator is turned on.
   • Tidal Volume:
     
     1. Attach a bag at the end of the circuit.
     2. Set the flow-meter at 2-3 L/Min.
     3. Keep the ventilator on volume controlled mode.
     4. Compare the ventilator set tidal volume to the pillows delivered volume.

8. Alarms:

   • High pressure: Compress the bag.
   • Apnea: Disconnect the bag.
   • Low O₂: Decrease FiO₂ below the alarm limit.

9. Soda-lime.

10. Ambu Bag:

    Squeeze and release it while the valve is closed, no gas should be released, and then while it's opened, watch the free flow of gas across it.

11. Suction Apparatus:

    Turn on the device, obstruct its and and watch the pressure created.