You need some type of volume measuring device Wright
Respirometer is a hand held device for this Measure exhaled tidal
volume for one minute, it will accumulate and give you a minute
ventilation
Slide 5
Take the minute ventilation value and divide by the RR. This
gives you the average Vt Coach the patient to do a Vital Capacity
Take the largest volume you obtain With another device, a
manometer, measure the amount of negative force a patient can
generate Do this by attaching the manometer and occluding all air
and watch the manometer
Slide 6
You should have four values Respiratory rate Minute ventilation
Vital capacity Negative inspiratory force From these you can
calculate Tidal volume RSBI
Slide 7
Normal 12-20 bpm Minimal values Less than 25 bpm More than 10
bpm
Slide 8
The average size tidal volume Measure the Minute Ventilation
and divide by the rate
Slide 9
Normal about 5ml/kg Minimal values More than 250ml Minute
ventilation and RSBI are more important
Slide 10
Normal 5-10 lpm Minimal Values Less than 10 More than 5
Slide 11
The maximum amount of air you can breathe out after inhaling as
much as possible. take a big breath in and blow it all out FVC is
the basic test done in a PFT The patient is not to use force for
this test, we are measuring just the volume
Slide 12
Normal Minimal values 10 ml/kg 1 liter (1000ml)
Slide 13
Negative Inspiratory Force Maximum Inspiratory Pressure (MIP)
Maximum Inspiratory Force (MIF) The maximum amount of force a
patient can generate while breathing in with a closed circuit.
Slide 14
Normal values >100 cmH2O Minimal Values Greater than 20
cmH2O
Slide 15
Rapid Shallow Breathing Index The more rapid and shallow the
breathing the less effective it is Respiratory rate(f) divided by
tidal volume(Vt) Single best indicator of post extubation
success