Safety of your nitrous oxide device

Safety of your nitrous oxide device

Safety and controls on nitrous oxide devices

The safety of your nitrous oxide device and the associated regular checks should be integrated into your everyday treatment. In our counselor find out at what intervals you should carry out the checks on your nitrous oxide device.

Weekly inspection of the nitrous oxide device

In order to check the intake of the ambient air, please breathe in through the spiral hose every week and set the flow controller to 0 l/min. When contracted breathing bag this opens Valve for sucking in the ambient air. Please check this after this test check valve, which the rebreathing of the patient in the breathing bag prevented. To do this, blow lightly into the spiral hose. The breathing bag must not fill with your exhaled air.

Monthly check: leak detection spray

A special leak detection spray can be used to easily determine whether there are any leaks. For this, all screw connections and connections on the mixer and Pressure reducer sprayed. The leak detection spray consists of soap and water. In the event of leaks, bubbles quickly form around the leak.

This test is carried out every time the cylinder is changed, at the latest monthly (also after sending it in for checking and before commissioning). Have any leaks repaired immediately. Additionally, you should gas cylinders Turn it off completely, the pressure must not drop noticeably for more than an hour.

Monthly check: 100% oxygen test

Open the bottles and set the concentration dial to 0% N2O. Now turn up the flow control. The Sphere in the Oxygenflow meter-Tube should move up. Please watch the nitrous oxide ball, it must not move or only move a little.

Safety of your nitrous oxide device

Monthly control: concentration regulator

Set the concentration control to 50% N2O and any flow. The balls in the flow tubes should now be about the same height. Now turn the concentration knob to 0% N2O. the Nitrous oxide-Flow should now drop to 0.

You can carry out the check for each treatment if you ventilate the patient with 100% O2 at the end.

MNational check: O2 flush

Press the O2 flush button. The gas bag should fill up within five seconds.

Nafter every treatment Nitrous oxide and oxygen: Bleed the nitrous oxide system

  1. The nitrous oxide and oxygen bottles are open after the treatment
  2. Turn the nitrous oxide cylinder to.
  3. Set the maximum N2O concentration and any total flow.
  4. The ball in the N2O tube falls. The nitrous oxide is now vented and there is no longer any nitrous oxide in the hose system.
  5. Now turn off the oxygen bottle.
  6. Leave the flow controller on flow until the ball in the right tube falls automatically.
  7. The system is bled. On both Pressure reducer is now 0 bar.
  8. If necessary, you can now loosen the pressure reducer and pressure hoses by hand.


Nitrous oxide workplace limit according to TRGS 900

German nitrous oxide occupational exposure limit: 100 ppm for nitrous oxide treatments lasting 30 minutes or more. With a treatment duration of z. B. 15 minutes, the occupational exposure limit may be exceeded by a factor of 2 (200 ppm).

Exposure time (min.)15202530
overshoot factor21,51,21

The occupational exposure limit indicates at which nitrous oxide concentration acute or chronic, harmful effects on health in general are not to be expected (§ 3 Para. 6 GefSto_V). Occupational exposure limits are average shift values for exposure, usually eight hours a day, five days a week during working life.

The limit values vary from country to country and are under discussion. The operator is responsible for complying with the room air concentration limits for nitrous oxide. To protect personnel, exposure to nitrous oxide should be kept as low as possible. To comply with the workplace limit values of TRGS 900, the following points should be observed:

Pay special attentioncountermeasures
Leaks on the maskAnnual maintenance and inspection

For each patient: check whether the mask is close to the skin, the right one
Choose the right size and model. Pay attention to open spots when putting on

Above all, use the study winner "double mask", the double mask
minimizes the indoor air contamination (see studies at the University of Bonn, etc.)

Set up suction in front of the nitrous oxide ow and use it
of the vacuum control block
Leaks at the pressure reducers
/ Pressure hoses
Annual maintenance and inspection

The pressure reducers and pressure hoses are sealed with O-rings. if on
If you notice hissing on the pressure reducer or hose, the O-rings must be replaced
checked and replaced if necessary.

Use leak detection spray on all screw connections and connections flow meter
and spray off the pressure reducer. The leak detection spray consists of soap and water,
in the event of leaks, bubbles quickly form around the leak. This test is mandatory for everyone
Bottle change, but no later than monthly.

Close the gas bottle completely, the pressure must not drop noticeably for more than 1 hour.

Always open the high-pressure valves of the gas cylinders slowly. Fast opening can to
cause the pressure reducer to malfunction.
Leak at bagAnnual maintenance and inspection

Weekly: Rapid test to check for leaks
Too much laughing gas
in the treatment room
Breathing bag overfilled. Reduce the total ow. Always on vertical folds
pay attention to the breathing bag.

Sedate with nitrous oxide in a room for no more than two hours without a break.

Ventilate the room after each patient (at least 5 minutes).

nitrous oxide dose for the patient as low as possible and necessary.

Switch on the air conditioning for the air turbulence in the room.
patient talks a lot/
breathes through the mouth
Advise the patient to breathe through their nose and to speak little.

In patients who cannot consciously breathe through their nose (small children, etc.),
Discontinue nitrous oxide treatment.

Leave a pool of saliva to force the patient into nasal breathing.

Each practice should prepare an individual risk analysis as shown in the table above.

You are also welcome to take a look at ours FAQ videos on the topic of nitrous oxide sedation. We are always at your disposal with our 360° Premium Service for all your questions. You can also find us on Instagram and Facebook. We look forward to you!

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