35RC17_8826_NEPHROPAIN Phase APRES : Interest of the Equimolar Oxygen Nitride Mixture (MEOPA) in the Treatment of Pain in Patients Presenting to the Emergency Department for Suspected Renal Colic: a Study BEFORE AFTER

Exclusion Criteria

• •Patient in shock of all types, defined here as an acute cardio-circulatory failure with mean arterial pressure less than 65 mm Hg.
• •Oxygen saturation below 93% in ambient air,
• •With suspicion of pneumothorax,
• •Having a history of emphysema and / or COPD (chronic obstructive pulmonary disease),
• •Contraindications to the administration of MEOPA: Patients requiring ventilation in pure oxygen; Intracranial hypertension (headache associated with jet vomiting); Any alteration of the state of consciousness, preventing the cooperation of the patient (Glasgow score less than 15); Head trauma; Pneumothorax; Emphysema bubbles; Gas embolism; Diving accident; Abdominal gas distension; Patient who has recently received an ophthalmic gas (SF6, C3F8, C2F6) used in ocular surgery as long as a gas bubble persists inside the eye and at least for a period of 3 months; Known and unsubstituted deficiency of vitamin B12 or folic acid; Neurological abnormalities of recent appearance and unexplained)
• •Contraindication to NSAIDs,
• •Patient treated in the long course by analgesic stage 3,
• •Pregnant or lactating woman,
• •Concomitant participation in another research involving the interventional or minimal risk and minimal human person,
• •Major persons subject to legal protection (legal safeguards, guardianship, tutorship) and persons deprived of their liberty.