#### Carrying out Measurement

ECG + Tonometer Mode
Once the patient's data has been entered and the Artery to be evaluated has been selected, the exam acquisition screen will be shown.
Place the probe on the patient's skin, at the Artery, and begin the examination.
The presence or absence of a signal on the Tonometric probe Sensor 2, determines the automatic start or stop of the acquisition (AutoFreeze).
Initially, the red light indicates that 12 complexes have not yet been registered or that the recording quality is poor.
The yellow light indicates that the quality of the recording is not yet optimal.
When the light is green it means that good recording quality was achieved and it can be stopped by removing the probe from the patient.
In order to save the exam, the diskette icon on the upper right corner, or the Enter key, or the Space bar must be pressed.
Warning! It is suggested to save the exam immediately after completing the registration because in the case the tonometric probe detects a signal, for example, if the pressure sensor is inadvertently touched, the recording restarts deleting the previous one.
The last 12 cardiac cycles are automatically recorded: of these, the last 2 are eliminated to exclude any artifacts related to movements during the interruption of the exam.
In the case of the Carotid Artery, the operator must insert the values of systolic blood pressure (bSBP) and diastolic blood pressure (bDBP) measured at the Brachial Artery level during the pulse wave recording, by means of a validated sphygmomanometer.
Save the blood pressure values, selecting "OK".
After peripheral pulse wave recording (Femoral Artery, Radial Artery, Brachial Artery, etc.), in addition to the values of Systolic and Diastolic pressure, the insertion of distances is required:
a) CAR-PER, Carotid-to-peripheral Artery (Femoral, Radial, Brachial, etc.) direct distance
b) CAR-sSN, Carotid-to-suprasternal notch distance
c) sSN-PER, Suprasternal notch-to-peripheral Artery (Femoral, Radial, Brachial, etc.) distance
Warning! Insert distance values in mm.
Save the blood pressure and distance values, selecting "OK".
Select the icon "Measurement" to begin another exam.
The Pressure curves can also be displayed in 3D mode.
Select the "3D" icon in the upper right corner of the screen.
Select the "2D" icon in the upper right corner of the screen to go back to the traditional visualization.
2 Tonometers Mode (WPP001-ETT only)
In this mode, the Tonometer-Sensor 1 (red o-ring, 1 beep at power on) should be placed on the Carotid Artery while the Tonometer-Sensor 2 (black o-ring, 2 beeps at power on) should be placed on the peripheral Artery.
The presence or absence of a signal on the Tonometric probe Sensor 2, determines the automatic start or stop of the acquisition (AutoFreeze).
Long-term Recording
Press CTRL + S to start a long-term recording that will be saved in text format (ASCII) to be displayed later with the WPulsePenLP software or third-party software. In the case of long-term recording, the software WPulsePen will analyze only the last 12 captured complexes.