spirometers

see also:

medical devices including spirometers MUST have TGA approval for legal use on patients
- there are many online devices available which do not have TGA approval which presumably could only be used for personal use at own risk
- for example, Contec SP70B:
  - only costs about $160 but the syringe to calibrate it costs about $800 which consumers will not be buying
  - gives a major error with PEFR% in the summary but the actual data appears reasonably correct within the limitations of the device
  - the volume vs time chart shows incorrect volumes on teh display but correct ones on pdf output
  - only uses outdated prediction equations (USA (NHANES), SBPT, ECSC, Knudson) and not the current GLI standard
  - but it can Bluetooth output to smartphone app for saving the PDFs and also for entering your personal data such as height, age
  - hence would not be approved by TGA as does not comply with their essential principles in particular accuracy

TGA approved spirometers

amongst the least expensive are the very light, compact PC-based spirometers such as:
- MIR MiniSpir 2 at $AU999 excl. gst but includes 60 free turbine mouthpieces