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Full Pulmonary Function Test
Our Pulmonary Function Test is the combination of the following individual tests:
- Spirometry, Flow volume Loop. This test measures your lung capacity and strength of inhalation and exhalation.
- Slow Vital Capacity. This test measures the maximum volume of air slowly exhaled from the point of maximum inspiration.
- Single Breath Diffusion. This test measures all the factors that affect the diffusion of a gas across the alveolo-capillary membrane.
- Functional residual capacity. We use a helium dilution method for measuring functional residual capacity, which is the volume of gas remaining in the lungs at the end-expiratory level.
- Oximetry. This test allows for the noninvasive estimation of blood oxygenation.
The patient must refrain from all inhalers for 6 hours prior to the test. The patient should also not smoke for 24 hours prior to the test.
All of these components, except #5 Oximetry are performed with the patient breathing into a special breathing valve (right) which is attached to a computer. The oximetry test is performed by placing a clip on the patient's finger or ear lobe for a few seconds. The patient's readings are compared with predicted normal subjects of the same sex,age, height and weight.