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Flashcards in Entonox Deck (10)
1

Composition and Properties

Entonox is an analgesic gas.

It is a 50:50 mix of Nitrous Oxide (N2O) & Oxygen (O2)

It is stored under pressure in cylinders.

2

Entonox Cylinders

CD Cylinders.
White with blue and white shoulders = 440 litres.
Marked Entonox.

3

Component Parts

Mouthpiece or mask.
Filter.
Demand valve.
High pressure hose.
Schrader connector.

4

Advantages

Pain relief is rapid.
Minimal side effects.
No cardiac or respiratory depression.
Analgesic effect rapidly reverses.
50% oxygen content is valuable in many medical or trauma conditions.

5

Indications for use

Any patient who is complaining of pain where Entonox is not contra-indicated.

Examples of when use is beneficial include Fractures/Sprains/Dislocations/Chest pain.

6

Contra-indications for use

Severe head injuries with impaired levels of consciousness.

Decompression sickness/Caisson's disease (the bends).

Violently disturbed psychiatric patients.

7

Cautions for use

Chest injuries and other conditions where a pneumothorax is suspected.

8

Cautions

Nitrous oxide begins to separate from oxygen when the temperature falls below about -6C.

Before use cylinders should be stored horizontally for 24 hours at a temperature above 10C.

If this is not practicable the cylinders must either:
a) be maintained at a temperature above 10C for at least 2 hours.
b) placed in warm water for 5 minutes and then completely inverted 3 times.

9

Documentation

Entonox is a drug.

All use of entonox must be documented on PRF.

Ensure that the hospital staff know the patient has had Entonox.

10

Entonox

NOO