Anesthetic Block of the Erector Muscles of the Lumbar Spine to Relieve Acute Lumbar Pain: Pilot Study

Inclusion criteria

• Patient with lumbago lasting less than 7 days despite analgesic / NSAID treatment.
• Patient with NS pain > 6
• Patient with Oswestry score > or equal to 30
• Patient informed of the trial and having signed the informed consent form prior to any trial-specific procedure,
• Patient willing and able to undergo all planned examinations and procedures in compliance with the clinical trial protocol,
• Patient affiliated to a social security or any health insurance.

Exclusion criteria

• Presence of "red flag" (non-disc lumbago):

• Motor deficit or signs of horsetail irritation
• Inflammatory pain waking up in the 2nd half of the night
• Tumoral context
• Infectious context or fever
• Altered general condition
• Traumatic context
• Osteoporotic context
• Risk of infection
• Patient with poor local skin condition
• Patient on AVK or anti-Xa anticoagulation, or bleeding disorder (antiaggregants authorized)
• Patients with hypersensitivity to Ropivacaine or any of its excipients: Sodium chloride, hydrochloric acid sodium hydroxide
• Patient with sciatica
• Patient with chronic respiratory insufficiency
• Patient with cardiac rhythm disorders
• Pregnant or breastfeeding woman or woman refusing effective contraception
• Patient deprived of liberty or under legal protection (guardianship or curator)
• Patient participating in another clinical research protocol involving a drug or medical device
• Patient unable to follow the protocol, as judged by the investigator
• Patient refusing to participate in the study