8-12 CASE Revision C
2060290-201
Conducting Spirometry Tests
Bronchodilator Test
The bronchodilator test always consists of two measurements: one before
and one after medication. After medication, measure the dilatation as
follows:
1. Click Start Bronchodilator Test to start the measurement.
2. The system asks whether the previous measurement is to be the pre-
dilation test (Before Bronchodilation test); the question appears only
if a spirogram of this patient has been recorded earlier the same day.
3. Answer the question with OK.
4. Conduct the test as a normal flow-volume measurement.
When you select the Post Test Review, you have another opportunity to
select a pre-dilation test for comparison with the current test.
Spirometry Tests with the LF 501
The LF 501 also supports VC measurements. The ATS and Envelope
measurement modes are not available.
VC Measurement
1. Explain the test maneuver to the patient.
2. Attach nose clip to ensure that the entire respiratory volume passes
through the sensor.
3. Click Start Test and ask your patient to perform the following
maneuver when the orange indicator on the sensor lights up:
Inhale, exhale and inhale again completely through the sensor.
Then your patient may resume normal breathing.
Note
The maneuver must be concluded within 20 seconds of clicking
Start Test.
The program terminates the measurement when it does not
detect a flow reversal within 4 s of two identified inversion
points, or after 5 full breaths.
The curve window shows the volume-time curve (expiration only) and the
table indicates the measuring values and the percentage deviation from
the reference values.
Click Start Test to initiate additional measurements. The next curve is
represented with a different color and superimposed on the first one. The
best results for EVC and IVC, which are not necessarily taken from the
same test, give VCmax.
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