PFT are valuable investigation in the management of patients with
suspected or previously diagnosis respiratory disease
&
To help monitor response to further treatment
Including Patient historyo How far can patient walk etc
Physical examination
Chest x-ray examination
Arterial blood gas analysis
Other pulmonary test
• Spirometer
• Lung volume
• Peak flow
Co2 partial pressure high (hypercapnia)peripheral signs
• warm periphery
• Dilated veins
• Bounding pulse
• Flapping tremor
Central signs
• Drowsy
• Papilledema
• Small pupils
Check by arterial blood gases.
Bedside lung functional test(help to identify obstructive air way disease)
Match blowing test
Blowing out lighted match about 15cm from the mouth and with the mouth wide open is easy as long as peak flow. (flow is approximately 80 L/ min)
Breath holding test
Measure the length of time a person can hold breath. Its normally less than 20 seconds.
Single breath count test.
Like breath counting test see how long patient can hold breath, in this test ask to hold breath and count as he or she can maximum.
Chest expansion test
Locate 4th intercostal space , place tape there and get normal reading around the chest. Then ask to patient
breath as possible and take measurement.
(should be more than 5cm)
Expiratory time
Timing the period of full expiration through wide open mouth following a deep breath.(should be less than 2 second)
Peak flow meterA measure of air way obstruction is the peak rate of flow of air out of the lung.
Record is make using peak flow meter.
Normally 300-600 L/min
spirometer
Including test for pulmonary mechanics . Measurement FVC, FEV1,FEF value, FIFRs.
Can identify air way obstruction.
Device are help to make pneumotachograph that can be help to assess disease such as, asthma, pulmonary fibrosis, cystic fibrosis,COPD