Efficacy of ARISTA-AH for Restoring Hemostasis Following Posterior Long-segment Spinal Fusion.

Inclusion Criteria:

1. Patient eligible to a posterior lumbar or thoraco-lumbar long-segment spinal fusion.

2. Surgery targeting at least 5 adjacent vertebra combined with one of the followingprocedure:

3. Intersomatic bone graft;

4. Pedicle substraction osteotomy;

5. Any other intervertebral osteotomy (e.g. Smith-Petersen osteotomy);

6. The use of a surgical drain inserted at the operative site is mandatory (suctiondrain and other drain are eligible);

Exclusion Criteria:

1. Subject under the age of 18 years old;

2. Subject with a known haemostatic disorder;

3. Subject with any infection or any immune system disorder;

4. Subject not eligible to a posterior spinal surgery;

5. Subject with a known allergy or any contraindication to the use of the study device;

6. Currently pregnant or planning pregnancy;

7. Prisoner or a ward of the state;

8. Subject no willing to participate in the study;

9. Subject not affiliated to a social security insurance.