Evaluation of the Benefit and Safety of Localized Tissue Hydration in the Management of Chronic Low Back Pain

Inclusion Criteria:

• Patient 18 years of age or older ;

• Patient with chronic, non-operated low-back pain operated for more than 3 months (verbal numerical scale ≥ 5);

• Chronic common lumbago not requiring surgical management surgical ;

• Lumbar MRI performed as part of routine care and available available for theinclusion visit;

• For women of childbearing age, use of a highly effective contraceptive method;

• Patient affiliated to a French health insurance scheme;

• Patient has signed an informed consent form.

Exclusion Criteria:

• Pregnant or breast-feeding woman;

• Patient in accident at work ;

• Patient with radicular syndrome;

• Contraindication to magnetic resonance imaging or CT scan;

• Severe cases of hydric inflation and hydrosodic retention, particularly in cases of :

• Decompensated heart failure;

• Acute renal failure with oliguria or anuria;

• Decompensated liver failure;

• Pre-eclampsia/eclampsia.

• Hypochloremia ;

• Hypernatremia ;

• Patients of legal age subject to legal protection, guardianship, curatorship ordeprived of liberty by judicial or administrative decision;

• Patient hospitalized without consent;

• Patient unable to answer a questionnaire;

• Patients who do not understand or speak French.

Exclusion period for inclusion in another study :

Included patients will not be allowed to participate in another interventional study during the entire follow-up period. The exclusion period is 8.5 months.