Some observational studies demonstrated that hypotension was associated with post-operative morbidity. During neuroradiological procedures, cerebral perfusion pressure should be cautiously maintained and hypertension should also be avoided. So, a precise arterial pressure measurement is needed during this procedures. A continuous monitoring of arterial pressure needed the placement of an arterial catheter in radial artery. The placement of this catheter might be long, difficult and incompatible with emergency neuroradiological procedure (such as thrombectomy). Then, this invasive technique is associated with several minor and major side effects such as: pain, infection, thrombosis, hematoma.

The Clearsight®, commercialized by Edwards Life Science Company®, is a non invasive device which mesure continuously arterial pressure with Volume-Clamp method. In operating room, some studies found a good accuracy between Clearsight® and other invasive monitoring system. There is no description of the use of Clearsight® during neuroradiological procedures.

The investigators hypothesized that Clearsight® measurement of arterial pressure are concordant with arterial pressure measure with the placement of an arterial catheter. The investigators also plan to evaluate accuracy of intermittent non invasive pressure measurement with traditional cuff.

Inclusion Criteria:

• Adult patients (Age > 18 years old)
• Elective or emergent neuroradiological procedure under general or local anesthesia for : Endovascular treatment of cerebral aneurysms / arteriovenous malformation, Thrombectomy, Arteriography, transluminal balloon angioplasty for vasospasm
• Placement of arterial catheter for the measurement of continuous arterial pressure

Exclusion Criteria:

• Contraindication of placement of arterial catheter or digital cuff (Clearsight) such as: Reynaud syndrome, Buerger syndrome
• Pregnant women
• Refusal

Adult patients, admitted in operating room elective or emergent neuroradiological procedure

All collected data that underlie results in a publication

Data will be available beginning one year and ending five years following the publication

Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement.