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The pressure is on! The danger of a broken blow off valve on a bag valve mask
  1. S B Ainsworth,
  2. R Humphreys,
  3. L Stewart
  1. Neonatal Unit, Directorate of Women & Children’s Health, Forth Park Hospital, Kirkcaldy KY2 5AH, Scotland, UK
  1. Correspondence to:
    Dr Ainsworth
    sean.ainsworth{at}faht.scot.nhs.uk

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We would like to draw the reader’s attention to a potentially dangerous occurrence with bag valve mask systems when repair and reassembly is carried out incorrectly. Bag valve masks are in common use in neonatal and paediatric resuscitations1,2 and incorporate a pressure relief valve to prevent excessive pressures being delivered.

In this case, checking of a Laerdal paediatric (500 ml) resuscitator (catalogue number 86005033) before use revealed that the …

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