The nurse instructs the client with asthma to perform which action and to repeat the method if coughing occurs while performing it.
Patients with severe asthma exacerbations frequently sit forward, activate accessory respiratory muscles, breathe more than 30 times per minute, have a resting pulse greater than 120 beats per minute, oxygen saturation less than 90%, and PEF less than 50% expected.
To use the peak flow metre properly, first move the indicator to the bottom of the numbered scale, then stand up, take a deep breath, completely fill your lungs, place the mouthpiece in your mouth, close your lips around it, and blow out quickly and forcefully with one blow, recording the result on the indicator. If the customer coughs or if you made a mistake the first time, repeat the procedure. Peak flow values should be taken during an asthma attack.
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