Optical Blood Pressure Monitoring Via Mobile Application, 3 Arms Swiss Clinical Study

Arm 1, Inclusion Criteria: * Informed Consent as documented by signature * Men or women older than 18 years old * Good understanding of written and oral speaking used at the centre where the study will be carried out * American Society of Anesthesiology clinical classification Risk (ASA) Class 1-3 * Scheduled for a general anesthesia * Necessitating an arterial catheters for the anesthesia and surgery. Arm 1, Exclusion Criteria: * Patients that cannot sign informed consent * Patients in emergency situation, are not legally competent, cannot understand the situation * ASA Risk class 4 * Dyshythmia like bigeminy, trigeminy, isolated Ventricular Premature Beats (VPB), atrial fibrillation * Lesion or deficiency on hand, preventing index obstruction of smartphone's camera * Known contact dermatitis to nickel/chromium Arm 2, Inclusion Criteria: * Informed Consent as documented by signature * Men or women older than 18 years old * Good understanding of written and oral speaking used at the centre where the study will be carried out Arm 2,Exclusion Criteria: * Patients that cannot sign informed consent * Patients in emergency situation, are not legally competent, cannot understand the situation * Known or suspected non-compliance (e.g. drug or alcohol abuse, language problems, psychological disorders, dementia) * Known pregnancy * Systolic blood pressure difference between two arms \>15mmHg or, diastolic blood pressure difference between two arms \>10mmHg * Unstable cardiac condition (myocardial infarction \< 1 week, pulmonary embolism, ventricular arrhythmia, decompensated heart failure) * Dysrhythmia like bigeminy, trigeminy, isolated Ventricular Premature Beats (VPB), atrial fibrillation * Lesion or deficiency on hand, preventing index obstruction of smartphone's camera * Known contact dermatitis to nickel/chromium. Arm 3, Inclusion Criteria: * Informed Consent as documented by signature * Pregnant women older than 18 years old * Good understanding of written and oral speaking used at the centre where the study will be carried out * Scheduled for a prepartum anesthesia consultation at the hospital maternity unit Arm 3,Exclusion Criteria: * Patients that cannot sign informed consent * Patients in emergency situation, are not legally competent, cannot understand the situation * Known or suspected non-compliance (e.g. drug or alcohol abuse, language problems, psychological disorders, dementia) * Systolic blood pressure difference between two arms \>15mmHg or, diastolic blood pressure difference between two arms \>10mmHg * Unstable cardiac condition (myocardial infarction \< 1 week, pulmonary embolism, ventricular arrhythmia, decompensated heart failure) * Dysrhythmia like bigeminy, trigeminy, isolated Ventricular Premature Beats (VPB), atrial fibrillation * Lesion or deficiency on hand, preventing index obstruction of smartphone's camera * Known contact dermatitis to nickel/chromium.