Respiratory Function Laboratory

The Laboratory, situated within Dr Churton’s Consulting rooms, utilizes state of the art Carfusion Body Plethysmography to deliver comprehensive lung function testing. Measuring Lung function is vital for diagnosis of breathing disorders, ongoing surveillance of these disorders and for screening of people at high risk for lung diseases such as smokers. Your GP can refer you for these tests.

Types of tests available:

  • Spirometry: the most common test performed. It measures the volume and flow of air both in and out of the lungs. Often this test is performed before and after an inhaler to aid in diagnosis.
  • Lung Volume measurement: this involves siting in a large glass enclosure and the pressure and volume of the lungs is measured.
  • Gas Diffusion: A small amount of gas in inhaled to measure how well the lungs can absorb oxygen into the blood.
  • Respiratory Muscle Strength: Measures the strength of the muscles that control breathing. These may be weak in certain neurological disorders.
  • Bronchoprovocation testing: a test to determin the reactivity of the airways. This can be helpful in the diagnosis of asthma. (This test can only be performed following consultation with Dr Churton).

How do I prepare for my lung function test?

No Caffiene – Tea, coffee, cola and chocolate should be avoided the day of the test.

Smoking and vigorous exercise should be avoided the day of the test.


Tests Time to withhold medication (before) Medication
Spirometry before and after bronchodilator 4 hours Asmol, Atrovent, Bricanyl, Ventolin
12 hours Foradile, Oxis, Seretide, Serevent, Symbicort
Bronchial Provocation testing 8 hours Atrovent, Airomir, Asmol, Bricanyl, Ventolin
24 hours Foradile, Oxis, Seretide, Serevent, Symbicort
72 hours Claratyne, Telfast, Zyrtec