Respiratory muscle strength (MIP, MEP and SNIP)
These tests measure the strength of the muscles you use to breathe. The scientist guides you through mouth-pressure tests and a short sniff manoeuvre.
MIP and MEP are the maximal inspiratory and expiratory pressures, and SNIP is the sniff nasal inspiratory pressure. For the mouth-pressure tests, you breathe out and then breathe in against the mouthpiece as strongly as you can. For SNIP, you make a short, sharp sniff through your nose while nasal pressure is measured.
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Before your test
Stop reliever puffers (Ventolin, Asmol, Bricanyl) 4–6 hours before, twice-daily combination inhalers 24 hours before, and once-daily inhalers, Spiriva-type inhalers and triple-therapy inhalers (Trimbow, Breztri, Trelegy) 36–48 hours before — longer for bronchial provocation testing. No smoking or vaping for 1 hour, no alcohol for 8 hours, no vigorous exercise for 1 hour and no large meal for 2 hours before the test. Bring all your inhalers and a list of your medicines. Do not stop a medicine you need to stay safe — if in doubt, take it and tell us. Full preparation guide and printable instructions →
After your test
Your tests are performed by a respiratory scientist and reported by one of our respiratory physicians. The report is sent to your referring doctor within two weeks. If your GP referred you for the tests only, your GP goes through the results with you and can ask us for a consultation if the report recommends one; if you are already seeing one of our physicians, the results are discussed at your next appointment. If you have not heard from your doctor three weeks after the test, call (03) 9422 0077.