Effect of BMI on the clinical outcome following microsurgical decompression in over-the-top technique: bi-centric study with an analysis of 744 patients.

Purpose: Decompression is one of the most common interventions in spinal surgery. Obesity has become an increasing issue in surgical patients. Therefore, the aim of this study was to analyze the clinical outcome following lumbar microsurgical decompression in correlation with the patient's body mass index (BMI).

Metrics Development for Minimal Invasive Unilateral Laminotomy for Bilateral Decompression of Lumbar Spinal Stenosis With and Without Spondylolisthesis by an International Expert Panel.

Study Design: Prospective study.

Objectives: To develop, operationally define, and seek consensus from procedure experts on the metrics that best characterize a reference approach to the performance of a minimally invasive unilateral laminotomy for bilateral decompression (ULBD) for lumbar spinal stenosis.

Methods: A Metrics Group consisting of 3 experienced spine surgeons (2 neurosurgeons, 1 orthopedic surgeon), each with over 25 years of clinical practice, and an educational expert formed the Metrics Group that characterized a lumbar decompression surgery for spinal stenosis as a "reference" procedure.

[The Facet Wedge: a minimally invasive technique for posterior segmental intra-articular fusion].

Objective: Minimally invasive posterior segmental instrumentation and intra-articular fusion with the Facet Wedge device.

Indications: All fusion indications in degenerative disc disease without significant translational instability, postnucleotomy syndrome, spondylarthrosis, discitis.

Contraindications: Translatory instabilities, status after decompression with partial facet joint resection, spondylolysis in the affected segment.

[The mono- and multisegmental ventral minimally invasive approach to the lumbar spine (OLIF) in lumbar deformities].

Objective: Minimally invasive anterolateral approach to the lumbar spine (oblique lateral interbody fusion, OLIF) to correct lumbar deformities.

Indications: Ventral release in degenerative lumbar scoliosis or segmental kyphosis and intervertebral spondylodesis.

Contraindications: No absolute contraindications.