Non-Invasive Blood Pressure Monitor Accuracy in Neonatal Subjects

Patient inclusion criteria Before proceeding with the blood pressure non-invasive measurements detection, patients shall be examined and met the following stated criteria: * Patients shall have already an invasive blood pressure monitoring (with catheter), this criteria applies only for Method 1. * It shall be possible to perform multiple measurements of Non Invasive Blood pressure on one or more limbs with inflatable cuff. * Patient with weight and age range according to the protocol requirements previously defined. * Once the patient is identify a pre-screening activities is performed in order to assess any differences in the blood pressure. If the differences are minimal, according to the criteria described in the next section "Exclusion criteria", the patient can be included in the study group. Exclusion criteria * Patients with unstable clinical or cardiovascular conditions; * Patients with circulatory problems which can results in different blood pressure values in the limbs; * patients with heart disease which can results in blood pressure wave morphology abnormalities; * patients where the difference of systolic blood pressure between two limbs is greater than 15 mm Hg or the difference of lateral diastolic blood pressure is greater than 10mmHg; * Patients with arrhythmias.