Interest of Urinary Oxygen Partial Pressure (PO2u) in Predicting the Onset or Recovery of Acute Renal Failure During Shock States - OXYpi Study

Inclusion Criteria : Group A: \- Patient admitted to Intensive Care Unit with a shock state defined by arterial hypotension requiring vascular filling and/or introduction of catecholamines - Age ≥ 18 years - Affiliated or benificiary of a social security scheme - Consent of the patient or a relative, or inclusion as part of an emergency inclusion procedure Group B: * Patient admitted to Intensive Care Unit without shock * Requiring urinary catheterization as part of routine care * Age ≥ 18 years * Affiliated or benificiary of a social security scheme * Consent of the patient or a relative, or inclusion as part of an emergency inclusion procedure Exclusion Criteria: \- Preexisting chronic kidney disease (CKD) (GFR \< 60 mL/min/1,73 m2 according to MDRD) - Chronic dialysis and/or kidney transplant - Anuria - Indication for renal replacement therapy (life-threatening hyperkaliemia, severe metabolic acidosis pH \< 7,15, uremia \> 40 mmol/L, pulmonary edema resistant to diuretics) - Patient requiring an extracorporeal life support (ECLS) - Pregnant, breastfeeding or parturient woman - Patient deprived of liberty by judicial or administrative decision - Patient under psychiatric care - Patient under legal protection measures