About the ssd protocol – Welch Allyn CP 200 Spirometry Option - User Manual User Manual
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Appendix B Spirometry Protocols
Welch Allyn CP 200 Spirometry Option
About the SSD Protocol
The SSD (Social Security Disability) protocol is for users who want to make sure that
testing associated with disability determinations meet the requirement of the Social
Security Administration. The device automatically performs as described here, regardless
of user-defined settings.
For details on SSD requirements, see the document noted in
When this protocol is selected, testing and reports are affected as follows:
•
Calibration Settings
Auto Calibration Report: Yes
(For details, see
“Reviewing the Calibration Settings”
•
Print Settings
Tests: Three Best Efforts
Scale: 20mm/s & 10mm/L
Curves: V/T & F/V
(For details, see
“Reviewing the Spirometry Print Settings”
•
Calibrations must be presented in a volume-time format at a speed of at least 20 mm/
sec and a volume excursion of at least 10 mm/L to permit independent evaluation.
•
Two of the satisfactory efforts should be reproducible for both pre-bronchodilator
tests and, if indicated, post-bronchodilator tests.
•
A test is considered reproducible if the two best efforts’ FVC and FEV1 do not differ
by more than 5 percent or 0.1 L, whichever is greater.
•
An effort is satisfactory for measurement of the FEV1 if the expiratory volume at the
back-extrapolated zero time is less than 5 percent of the FVC or 0.1 L, whichever is
greater.
•
An effort is satisfactory for measurement of the FVC if maximal expiratory effort
continues for at least 6 seconds.
•
The device should accurately measure time and volume, the latter to within +/- 1% of
a 3 L calibrating volume.
•
The testing device must have had a recorded calibration performed previously on the
day of the measurement.
•
The linearity of the device must be documented by recording volume calibrations at
three different flow rates of approximately 3 L/6 sec, 3 L/3 sec, and 3 L/sec.
•
These calibrations may be exhale-only since no inhale parameters are reported.
•
Whenever the test report is printed, the calibration report shall also be printed.
•
If the calibration accuracy is between 1% and 3%, the electrocardiograph applies
correction factors to the recorded FVC and FEV1.