Comparison of a Cortivazol (ALTIM®) Infiltration of Posterior Epidural Space at L3-L4 Stage Versus an Epidural Infiltration of Cortivazol (ALTIM®) on Contact With Disco Radicular Conflict in Discal Sciatica

Comparison of a Cortivazol (ALTIM®) Infiltration of Posterior Epidural Space at L3-L4 Stage Versus an Epidural Infiltration of Cortivazol (ALTIM®) on Contact With Disco Radicular Conflict in Discal Sciatica - Controlled Randomized Trial With Double Blind Evaluation

In discal sciatica, after failure of medical treatment, the investigators propose frequently a spinal infiltration of corticoids the most closer of disco-radicular conflict. Recently, some cases of paraplegia during lumbar foraminal infiltrations have induce a reduction of indications of this type of infiltration. An alternative would be to propose a lateral epidural infiltration on contact with conflict.The objective of this study is to compare, in 112 patients with a less than 6 months discal sciatica, the efficacy on pain of a non target posterior epidural space infiltration of corticoids done at L3-L4 stage on scan control versus an epidural infiltration of the same corticoid done in lateral on contact of disco radicular conflict on scan control.

Inclusion Criteria:

• Informed consent
• Aged from 18 to 65 years
• Affiliated or benefit from an insurance regimen
• Patient with a sciatic answering to the definition
• Discal sciatica more than 15 days and less than 6 months
• Discal hernia (scan or RMI)
• Negative BHCG and normal coagulation parameters

Exclusion Criteria:

• History of lumbar surgery
• Spinal infiltration of corticoids in 30 days before inclusion
• Iode allergy
• Anticoagulation therapy, unbalanced type 2 diabetes, instable HTA
• Motor loss < 4 (muscular testing)
• Sphincter disorder (cauda equida syndrome)