Determination of Predictive Clinical Signs of Effective Rhizolysis Using the DFL Questionnaire.
Determination of Predictive Clinical Signs of Effective Rhizolysis Using the DFL Questionnaire.
Rhizolysis or lumbar thermocoagulation is a therapeutic proposal for certain types of chronic
 lower back pain that is resistant to medical treatment and outside the field of surgical
 indications.

 A previous study has selected functional and physical signs selected by analysts and a group
 of experts from the modified "Delphi" prediction method. This study resulted in the creation
 of a questionnaire (DFL questionnaire) with 16 symptoms: 7 functional and 9 physical.

 The aim of this new study is to select the symptoms that have the best positive predictive
 value among the 16 symptoms, to predict a good result of rhizolysis, on the criterion of
 their mitigation or disappearance in case of effective rhizolysis.
The frequency of chronic lower back pain is a major economic and social problem. Indeed,
 there are numerous solutions that can be offered to patients, but sometimes they are
 unsatisfactory as medical treatments are often insufficiently effective, surgical techniques
 are often invasive and indications can be limited.

 Rhizolysis or lumbar thermocoagulation is a therapeutic proposal for certain types of chronic
 lower back pain that is resistant to medical treatment and outside the field of surgical
 indications. This technique, which is minimally invasive, is low-risk for patients and is
 widely used. However, few studies have shown its effectiveness, so the level of evidence is
 not enough to make this technique accepted as a standard.

 A previous study has selected functional and physical signs for joint involvement in lower
 back pain. This selection was made by analysts and a group of experts from the modified
 "Delphi" prediction method. This study resulted in the creation of a questionnaire (DFL
 questionnaire) with 16 symptoms: 7 functional and 9 physical.

 The aim of this new study is to select the symptoms that have the best positive predictive
 value among the 16 symptoms, to predict a good result of rhizolysis, on the criterion of
 their mitigation or disappearance in case of effective rhizolysis.
Inclusion Criteria:

 -  Patient suffering from chronic lower back pain developing for more than 6 months and
 resistant to the medical treatments.

 -  Patients with an indication of lumbar rhizolysis for their chronic lower back pain
 with a facet component, the starting point of which corresponds to the L4L5 and/or
 L5S1 stages.

 -  Patient not objecting to their participation in the study.

 -  Subject registered with a social security scheme

 Exclusion Criteria:

 -  Adults under judicial protection

 -  Adult under guardianship or trusteeship

 -  Pregnant women

 -  Minors