Comparison of Axillary Versus Subclavian Vein Strategies for Central Venous Catheterization Under Continuous Ultrasound Guidance

Inclusion Criteria: * The patient must have given his/her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * The patient is available for 24 hours of follow-up * Patient requiring the establishment of a central venous catheter Exclusion Criteria: * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection, under tutorship or curatorship * The patient refuses to sign the consent * It is impossible to correctly inform the patient * The patient is pregnant, parturient, or breastfeeding * Patient has a body mass index \< 15 or \> 40 * Congenital or acquired anatomical deformity (radiation therapy, trauma, surgery) of the axillary and/or subclavian regions * Bleeding disorder (platelets \< 50,000, prothrombine \< 50%, activated cephaline time \> 2 times the control value) * Severe hypoxemia defined by a ratio PaO2 / FIO2 \< 100 * Infection of the puncture area * Known thrombosis of the subclavian or axillary veins * Scheduled length of hospitalization less than 24 hours * Agitated or non-cooperative patient * The patient has already been included in this study * subclavian and axillary veins are not simultaneously echogenic on one or both sides (left and right).