Aperius® interspinous spacer vs open surgery in degenerative lumbar spinal stenosis
P Menchetti, F Postachini
P Menchetti, F Postachini. Aperius® interspinous spacer vs open surgery in degenerative lumbar spinal stenosis. The Internet Journal of Minimally Invasive Spinal Technology. 2008 Volume 3 Number 4.
In the latest years several Interspinous spacers have been created and employed in degenerative lumbar spinal stenosis (DLSS) treatment, both percutaneously (Aperius, Superion, In-Space) and via mini open (X-Stop). At the moment the real efficacy of these devices, particularly about the percutanously ones, it is not completely clear and has not been fully investigated regarding indications, anatomic and biomechanical effects and results. From the above considerations, the purpose of our study is to evaluate the results of the Aperius™ PercLID™ (Medtronic) interspinous spacer versus open surgery in DLSS treatment, and to define the surgical indications and biomechanical/anatomic effect related.MATHERIALS AND METHODS: Two different groups of patients affected by DLSS have been analyzed: in Group I of 30 patient the Aperius™ PercLID™ has been implanted; in Group II open surgery (with or without the use of microscope) open surgery has been performed. In Group I there were 14 males and 14 females, the average age was 72 years and in 2 patients a spondilolysthesis < 25% was present. In 20 cases the interspinous spacer have been implanted on L4-L5, in 3 cases on both L3-L4, L4-L5, and in the other ones on L3-L4. No preoperative motor deficit was present. In most of cases a 12mm diameter has been implanted. The average follow-up was of 8.2 months (6-14).