Innovative Technologies

What is Audible Cue?

Improve manual ventilation and CPR with ETCO2 Audible Cue

ETCO2 audible Cue helps the caregiver to manage ETCO2 during manual ventilation and CPR by delivering five different, easily recognizable sounds to indicate five ranges from high to low ETCO2. Audible Cue provides the caregiver with instant feedback about ETCO2 level changes without needing to look at the monitor.

delivering 5 different easily recognizable sounds

The following figure shows the results of a study comparing manual ventilation with no capnometric monitoring and with capnometric monitoring with and without Audible Cue1.

1 Miyasaka K et al. Audible capnometric cues facilitate targeted control of end-tidal carbon dioxide during manual ventilation. Annual meeting of American Society of Anesthesiologists. 2013; A1185. Audible cue delivers 5 different, easily recognizable sounds to indicate ETCO2 range.

The audible cue sounds by 5 different patterns. TRY ! Listen to the sound: Click 

Primarily designed for ETCO2 range* [mmHg]

Audible Cue sound type

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Audible Cue sound design

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Example of situation                             
Manual ventilation and ROSC confirmation 45≤
High.png High_A.png
  • Hypoventilation is caused by insufficient manualventilation during transport
  • ROSC is achieved*

35 - 44
Normal.png Normal_A.png
  • Ventilation is sufficient

20 - 34
(Low 1)



  • Hyperventilation is caused by over aggressive manual ventilation during transport

CPR (chest compression) 10 - 19
(Low 2)
Low2.png Low2_A.png
  • High quality chest compressions are achieved

(Low 3)
Low3.png Low3_A.png
  • Quality of effectiveness of chest compression may need improvement

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