#### Exam Quality Index

WPulsePen software provides real-time quality control of pulse waves recording and provides the following parameters during the exam:
S.I. [%], Superposition Index: during exam registration, S.I. shows how the last acquired pulse waveform superimposes on the previously recorded waves. S.I. is related only to the last recorded pulse wave, thus this parameter can have a great variability during the pulse wave recording.
p Q.I. [%], Partial Quality Index: indicates the partial value of the quality of the examination, considering the last 5 recorded curves..
Cpx indicates the number of the recorded cardiac cycles.
The blue line is the last recorded pulse wave.
The green line is the average of the previous 5 recorded pulse waves.
The Quality Index Q.I. which is calculated at the end of the registration and that is included in the report, refers to the set of ten recorded pressure curves.
Semaphore
Red light: less than 12 cardiac cycles were recorded or the superimposition index is poor.
It can rarely happen that WPulsePen software is not able to identify the QRs complex of the ECG, because of reduced amplitude, pathological situations, noise, etc... In any case, the operator can save the test: only the last 10 seconds are recorded, without analysis of the pulse waveforms (that must be carried out manually).
Yellow light: at least 12 cardiac cycles were recorded, but the Partial Quality Index "p.Q.I." is lower than 75%.
Sometimes it's not possible to obtain the green light, because of an irregular pulse waveform (such as during atrial fibrillation or ventricular extrasystolic arrhythmia, ...). Nevertheless, the operator can still save the exam.
Green light: at least 12 cardiac cycles were recorded and the Partial Quality Index "p.Q.I." is higher than or equal to 75%.
Warning! The green traffic light doesn't mean that a good recording has been acquired. It means only that 12 well-overlapped pulse waves were recorded. The operator must always verify the accuracy of the morphology of the recorded pulse waves.