First aid measures
The aim is to terminate exposure and support vital functions whilst medical help is being sought:
- protective clothing and breathing apparatus should be worn if hydrogen cyanide or liquid cyanide are involved
- if the patient is unconscious, establish an airway and give 100 % oxygen - if this is unavailable, employ expired air resuscitation; use of a Laerdal pocket mask is preferred to mouth to mouth contact if cyanide salts have been ingested
- remove all contaminated clothing
- wash skin thoroughly with soap and water
- give amyl nitrite by inhalation:
- preferably, give 0.2 - 0.4 ml amyl nitrite via an Ambu bag; alternatively,
- break one ampoule of amyl nitrite onto a cloth and hold under the patient's nose for 30 seconds in every minute - use a new ampoule every 3 minutes to a maximum of 6
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