7
Press the Select Function
key and the unit will start ‘breath
hold’ countdown timer of 15 seconds (CO Check+) and 10
seconds (CO Check + Baby). Encourage the subject to hold the
breath until the unit beeps to start the test. The display will show
the blow icon.
The subject should place their lips around the cardboard
mouthpiece and blow gently and continue blowing until their lungs
are completely empty. CO is collected in the last portion of the
breath (alveolar breath).
Results Display
The CO Check+/CO Check+ Baby will beep and show the final
reading in PPM (parts per million).
By pressing the Select Function
key
the reading changes to
%COHb (carboxyhemoglobin).
and then press Select Function key
to display % FCOHb (fetal
carboxyhemoglobin) - (CO Check Baby only)
