The number correction is to partially close the pop-off valve and squeeze the bag to deliver a breath. The idea is to temporarily take control of the patient’s breathing, give no more than 3 breaths per min.
You want to deliver oxygen and deliver some isoflurane so that you can ensure that the patient wills tay asleep once the induction drug has worn off.
A capnograph is handy as you want the CO2 to remain high enough so that the patient will start to breathe on his own. Just below 60 is a good number to aim for on the capnograph.
So, keep the breaths small so you don’t remove all the CO2; a small breath is about 10mm of water on the manometer of your anesthetic machine.
