The three most important are: 1  SaO2. Itâs a percentage that shows how saturated your arterial blood is with oxygen. 2  PaO2. Itâs the partial pressure of arterial oxygen. . 3  Itâs the same as SaO2, although itâs estimated by pulse oximetry. A normal value is 95-98%, although 90% or better is usually considered acceptable.
A peak flow meter is a portable, inexpensive, hand-held device used to measure how air flows from your lungs in one âfast blast.â In other words, the meter measures your ability to push air out of your lungs.
Many peak flow meters are colour-coded or come with a chart so that you can easily compare the readings. The peak flow meter is very dependent on your child's effort. To use a peak flow meter effectively, your child must be old enough to follow instructions and to make a consistent effort even when she is sick.any peak flow meters are colour-coded or come with a chart so that you can easily compare the readings. The peak flow meter is very dependent on your child's effort. To use a peak flow meter effectively, your child must be old enough to follow instructions and to make a consistent effort even when she is sick.