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	How to perform FVC+FIVC maneuver?

Solution Select 'FVC' button. The measurement is started while breathing with tidal volume and followed by one or several maximal expiratory and inspiratory manoeuvres.

For quality reasons the results are calculated from whole breaths. This means that each inspiration and expiration is processed separately to calculate the results.

The forced expiratory breath must start with inspiration changing to forced expiration and ending to inspiration again (or visa versa). The software wants to find the inspiration before the forced expiration and also after it. This guarantees that the measurement procedure is made properly and that the measurement is not stopped too early. To get the results calculated for the forced inspiratory breath the software wants to find the expiration before and after forced inspiration.

After the successful measurement of maximal expiratory and inspiratory flow and volume the numerical results are written to the table in the upper right side of the window.

The measurement is automatically stopped at 60 s or can be interrupted, when pressing 'STOP' button.

After stopping or interrupting a measurement the envelope curve is automatically calculated and displayed on the window. The following parameters are calculated from the envelope curve data:

FVC = Forced Vital Capacity.
FEV0.5 = Forced expiratory volume at 0.5s.
FEV1 = Forced expiratory volume at 1.0s.
FEV6 = Forced expiratory volume at 6.0s.
FEV0.5%(FVC) = Ratio between FEV0.5 and FVC.
FEV0.5%(VC) = Ratio between FEV0.5 and VC.
FEV0.5%(VCFVC) = Ratio between FEV0.5 and VC or FVC witch is larger.
FEV0.5%(FEV6) = Ratio between FEV0.5 and FEV6.
FEV1%(VC) = Ratio between FEV1 and VC.
FEV1%(FVC) = Ratio between FEV1 and FVC.
FEV1%(VCFVC) = Ratio between FEV1 and VC or FVC witch is larger.
FEV1%(FEV6) = Ratio between FEV1 and FEV6.
PEF = Peak Expiratory Flow l/s.
PEF = Peak Expiratory Flow l/min.
FEF25 = Forced expiratory flow 25% VC [MEF75].
FEF50 = Forced expiratory flow 50% VC [MEF50].
FEF75 = Forced expiratory flow 75% VC [MEF25].
FEF25-75% = Forced expiratory flow 25-75% [MMEF].
METT = Mean transit time.
AEFV = Area of expiratory FV curve.
FET = Forced Expiratory Time.
EV = Extrapolated volume.
LAge = Lung Age.
FIVC = Forced inspiratory vital capacity.
FIV0.5 = Forced inspiratory volume at 0.5s
FIV1 = Forced inspiratory volume at 1.0s
FIV6 = Forced inspiratory volume at 6.0s
FIV0.5%(FVC) = Ratio between FIV0.5 and FVC.
FIV0.5%(VC) = Ratio between FIV0.5 and VC.
FIV0.5%(VCFVC) = Ratio between FIV0.5 and VC or FVC witch is larger.
FIV0.5%(FIV6) = Ratio between FIV0.5 and FIV6.
FIV1%(VC) = Ratio between FIV1 and VC.
FIV1%(FVC) = Ratio between FIV1 and FVC.
FIV1%(VCFVC) = Ratio between FIV1 and VC or FVC witch is larger.
FIV1%(FIV6) = Ratio between FIV1 and FIV6.
PIF = Peak Inspiratory Flow l/s.
PIF = Peak Inspiratory Flow l/min.
FIF25 = Forced inspiratory flow 25% VC [MIF75].
FIF50 = Forced inspiratory flow 50% VC [MIF50].
FIF75 = Forced inspiratory flow 75% VC [MIF25].
FIF25-75% = Forced inspiratory flow 25-75% [MMIF].
MITT = Mean inspiratory transit time.
AIFV = Area of inspiratory FV curve.
FIT = Forced inspiratory time.
IEV = Extrapolated inspiratory volume.

After the measurement a question is displayed in the window.

'Do you accept this measurement?'

Only either 'Yes' (accepted) or 'No' (not accepted) is valid as a response to the question.

If the answer is 'Yes' for acceptance of the measurement the corresponding test is saved as one of the eight measurements of the patient in either phase (either Pre phase or Post phase). The software returns back to the measurement window, where selection for e.g. a new measurement can be activated. In case, where the answer is 'No' for not accepting the measurement, the software returns back to the measurement window without saving the measurement.

1. Place flow transducer in patient's mouth. Patient should breathe in a relaxed/normal rate and frequency through the flow transducer.
2. Start the measurement by selecting FVC button.
3. Patient expires slowly until the indicator changes to green.
4. Patient inspires fast and strongly.
5. Patient expires fast and strongly, minimum until indicator changes to green.
6. Patient returns to normal, relaxed breathing.
7. Finish measurement by selecting STOP button.
8. Remove flow transducer from patient's mouth.

or

1. Place flow transducer in patient's mouth. Patient should breathe in a relaxed/normal rate and frequency through the flow transducer.
2. Start the measurement by selecting FVC button.
3. Patient inspires fully.
4. Patient expires fast and strongly, minimum until indicator changes to green.
5. Patient inspires fast and strongly.
6. Patient returns to normal, relaxed breathing.
7. Finish measurement by selecting STOP button.
8. Remove flow transducer from patient's mouth.

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28 Dec 2007 08:31 AM

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