Cosmed Quark PFT, Руководство пользователя

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Chapter 7 - Lung volumes - 75
Option Description
End-of-test criterion FetN
2
value under which the wash-out test is concluded
automatically
FRC Extrapolating Enable the extrapolation of FetN
2
to the end-of-test
criterion
Vt stability threshold Recognition criterion of regular respiration
Breathing Depth Range of respiration control bar during FRC (tidal
volume)
Breathing Frequency Range of respiration control bar during FRC
(respiratory frequency).
Pressing the System… button, you can set the following options:
Option Description
System dead space Add the volume of the viral filter eventually used
O2 cylinder impurities Refer to the used O2 cylinder analysis certification
Perform the test
1. Select Multi-Breath N
2
wash-out from the Test menu and wait for the green led is
prompted on the right side of the screen.
2. Connect the patient to the breathing valve and invite him/her to breathe normally.
3. Wait for the message “carry out slow vital capacity” is prompted on the screen of
the PC and let the patient to perform a slow vital capacity.
4. Wait for a normal breathing pattern is again established and press Start (F2) to
begin the wash-out with oxygen.
5. Wait for the final Nitrogen concentration (FetN
2
) reaches a value lower than 2.5%
and press Stop (F3) to conclude the test.
6. In order to visualise the graph and the main parameters press the follow buttons:
view FRC graph
view Volume Time graph
view data of the test
view breath by breath data
At the end of the test, you can edit the test:
•
Display the test to be modified
•
Right click with the mouse and select Edit... to change the test properties (wash-out
volume, sample volume, effective breath hold time calculation...).