what are the indications for PFT?
- to identify and quantify changes in pulmonary function
- to evaluate the need and quantify therapeutic effectiveness
- to screen for pulmonary diseases
- to assess patients for risk of post-op pulmonary complications
- to determine pulmonary disability
- differentiate between restrictive and obstructive
what are the contraindications for PFT?
hemoptysis pneumothorax MI PE Nausea recent cataract surgery patients with dementia
what must all measurements be set to?
BTPS
how do you calibrate for volume?
3 L super syringe
+/- 3 % (2.91-3.09)
what do you use to calibrate for flow?
rotameter (pneumotachometer)
+/- 5%
what do soda lime crystal abosrob?
carbon
what do drierite crystals absorb?
MOISTURE
what values can be obtained at bedside?
VT RR VE VC NIF PEFR
what are used to obtain beside values?
wrights respirometer
pressure manometer
PF meter
how do you measure a VC?
70( pts weight)
what is normal PEFR?
400-600
simple bedside spirometry will not measure?
RV
FRC
TLC
what is the MVV test?
Maximum Voluntary Ventilation
-effort dependent patient cooperation test for which the patient is asked to breath as deeply as possible and as rapidly as possible for at least 12 seconds
