Assessment of Preload Dependency Via Measurement of Peripheral Venous Pressure During an Alveolar Recruitment Manoeuvre

Inclusion Criteria: * Patients aged 18 years or older, for whom the trusted person designated by the patient or, failing that, a relative has read and signed the consent form for participation in the study * Patient hospitalised in intensive care, under sedation and controlled mechanical ventilation * Equipped with a central venous line in the superior vena cava territory and an arterial catheter. * Whose state of health justifies vascular filling Exclusion Criteria: * Patient under legal protection, guardianship or curatorship * Pregnant or breastfeeding woman * Patient not affiliated to the French social security system * Contraindication to the realization of an alveolar recruitment maneuver