DSI Buxco FinePointe - FRC (Functional Residual Capacity) Test; Occlude at FRC

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Pulmonary Function Test • Publication 014181-001 Rev 02 • www.datasci.com ©2023 Data Sciences International
FRC (Functional Residual Capacity) Test
For the FRC test to successfully return good data, FinePointe must occlude the subject at the end of expiration (at
FRC). In addition, the subject must attempt to breathe while its airway is occluded. Finally, there can be no leaks
in the manifold. Leaks in the manifold with violate a basic assumption which is made in this test that the volume is
constant.
Occlude at FRC
One of the most challenging objectives to meet with this test is to ensure that when the occlusion takes place, the
animal is at FRC.
In the figure above, you can decide if FinePointe occluded the subject appropriately at FRC.
If it does not look correct, right click on the line corresponding to the test and select Reject Data.
Rejected data will be excluded from reports.
Occlusion appears to
occur at the bottom of
the breath
Occlusion occurs at zero pressure,
and pressure returns to zero
between efforts