TruVent : improvement

-Add a flow/pressure curve (very common on resuscitation and anesthesia ventilators)

-Add anaesthetic gases (in France : Sevoflurane and Suprane) : measurement in percentage or MAC (MAC more complicated because the machine needs to calculate several factors) but a wheel with a percentage inside would be good enought (Sevoflurane or Suprane option, the learner can choose one or the other or both).

-Fresh gas measurement : 02 gauge in L/minute