Step 1 See whether the mouthpiece is fitted into the Peak Flow Master. If not, attach it.
	Step 2 Move the pointer along the slot towards the mouthpiece till it dose not move any further.
	Step 3 Hold the Peak Flow Master so that your fingers are away from the scale and the slot. Do not cover the holes at the end of the Peak Flow Master.
	Step 4 It is better to take your peak flow reading while standing up. Breathe in deeply. Place the mouthpiece of the Peak Flow Master in your mouth. Keep your lips closed firmly around the mouthpiece. Blow out just once as hard and as fast as you can. Do not put your tongue inside the mouthpiece, while blowing into the Peak Flow Master. If you cough or spit into the mouthpiece, just take your reading again.
	Step 5 Now, look at the scale. The pointer has moved up on the scale. Note where the pointer has stopped on the scale. That number is your peak flow reading.
Step 6 Repeat steps 2 to 5 and take two more readings. Now you have totally three readings in the Peak Flow Chart. You should take your readings twice a day, first thing in the morning, and then at bed time, or as directed by your doctor.

In case you get an unusually low reading
If you take your Peak Flow measurement and get an unusually low reading, it could mean that your asthma is getting worse. Or that your Peak Flow Master may be broken. Check to make sure that it is not broken. Slide the pointer along the slot to make sure that it moves freely. If you are sure that you are following the instructions correctly and that your meter is not broken, contact your doctor for advice.

No Matter what your peak flow readings are, if you are experiencing chest tightness, shortness, shortness of breath, coughing or wheezing, you should always follow your doctor’s advice.

How to clean your Peak Flow Master

The Peak Flow Master should be cleaned once a month.
Take the mouthpiece off, and put both parts in a mild detergent solution for 2-3 minutes as shown in the figure. Do not use hot water. Shake both parts inside the solution to ensure thorough cleaning. Do not insert a bottle brush or any other object. Rinse in clean water and shake the Peak Flow Master gently to remove water. Leave it to dry on its own. Do not insert a cloth or paper towel.

Storage and replacement of your Peak Flow Master

Keep the Peak Flow Master back in the box provided, after each use, to prevent exposure to dust and moisture. Clean your Peak Flow Master once every six months, if it has not been used for some time.

The Peak Flow Master should be replaced at the end of three years.

For Healthcare Professionals
For each new patient using Peak Flow Master in hospitals and clinics, one of the following should be provided:

•  A disposable mouthpiece or,

 
•  A sterilizable plastic mouthpiece

Reprocessing Sterilizable Plastic Mouthpiece
After every use, clean with 70% Isopropyl Alcohol (IPA) or autocave at 121 degree centigrade for 20 minutes.

Do not autoclave the Peak Flow Master
Autoclaving the Peak Flow Master will distort the instrument and its accuracy.

Performance Accuracy
The Peak Flow Master Conforms to EN 13826:2003. Peak flow meters that have been calibrated to the EN 13826:2003 standard, have an accuracy better than + or – L/min or 10% of the reading, whichever is greater.