Turbine calibration is performed with a calibration syringe to simulate a FVC test
for the expired parameters and a FIVC test for the inspired parameters.
To enter the calibration function, select the "Turbine Calibration" option from the
Service Menu (as explained in paragraph 2.7).
To enter the new calibration values choose the item "Modify" in the submenu, enter the password and insert the new calibration values
Before inserting the new calibration values be sure to check that the syringe volume corresponds to the value on the top right side of
the screen. To change the syringe volume touch the
being used for the calibration test.
In the FVC and FIVC fields insert the FVC and FIVC parameters measured in the calibration test with the calibration syringe, by using
the numbers visualized on the bottom of the screen. Once the data for each parameter has been inserted touch the OK icon.
Insert both the FVC and the FIVC values. If the calculated correction factors are acceptable (<10%), these are displayed next to the
New FVC and New FIVC parameters. The message ENTER OK TO CONFIRM will appear.
By touching the
icon the device returns to the previous step.
If the FVC and FIVC correction factors are > 10% theFVC and FIVC values will not be accepted. This means that the device is not
capable of correcting such a large calibration error In this case:
- Check the correct functioning of the Spirodoc with a new turbine and/or
- Clean the turbine.
To erase the calibration in use and to reset the original factory calibration, use the item "Factory defaults" from the Calibration menu
WARNING
In line with the publication "Standardised Lung Function Testing" of the European Respiratory Society (Vol 6, Supplement
16, March 1993), the air expired from the mouth is at a temperature of circa 33/34 °C.
The expired flow and volume, to be converted to BTPS conditions (37 °C) must be increased by 2.6% - this is derived from
the BTPS factor of 1.026 at a temperature of 33°C, which represents a correction of 2.6%. In practice the BTPS factor for the
expired flow and volumes is therefore constant and equal to 1.026.
For the inspired volumes and flows, the BTPS factor depends upon the ambient temperature as the air inspired is at ambient
temperature.
For instance at an ambient temperature of 20°C with relative humidity at 50%, the BTPS factor is 1.102, a correction of +10.2%.
The correction of the inspired volumes and flows is made automatically as the machine has an internal temperature sensor;
the BTPS values are thus calculated.
If a 3L syringe is used to make the calibration and if the Spirodoc is calibrated correctly then the FVC (syringe) value will be:
3.00 (FVC) x 1.026 (BTPS) = 3.08 L (FVC at BTPS).
If the ambient temperature is 20°C, the FIVC (syringe) value will be:
3.00 (FIVC) x 1.102 (BTPS) = 3.31 L (FIVC at BTPS).
The user must be aware that the volume of the syringe shown by the machine is converted to BTPS conditions, so that the
"increase" of the results with respect to the expected values does not constitute an error.
For instance, if the calibration procedure is carried out with measured data:
FVC = 3.08 L and FIVC = 3.31 L at an ambient temperature of 20°C the resulting correction factor becomes:
This does not represent an error but is a logical consequence of the above detailed explanation.
NOTE
A calibration may also be performed with the MIR Spiro software included with the device. For more information concerning
the on line calibration procedure using MIR Spiro please read the on line MIR Spiro manual
2.8
Patient Data
From the main screen the user can access the patient data management by using the icon
Modify current patient data *
Insert a new patient
*this function is visualized only if a patient file was previously inserted in the database
If the database is empty the device will automatically direct the user to insert the name of the patient.
2.8.1
Inserting data of a new patient
Touch the icon
and insert the patient information in the required sequence.
SPIRODOC
icon, this way the cursor allows to insert the correct volume of the syringe
EXPIRATION
.00%
INSPIRATION
.00%
cod. 980156
Rev 4.2.1
spirodoc
. By entering this menu it is possible to:
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User manual