title: Lumbar spinal stenosis minimally invasive treatment with bilateral transpedicular facet augmentation system.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the effectiveness of a new pedicle screw-based posterior dynamic stabilization device PDS Percudyn System™ Anchor and Stabilizer (Interventional Spine Inc., Irvine, CA) as alternative minimally invasive treatment for patients with lumbar spine stenosis.
  
  
  METHODS
  Twenty-four consecutive patients (8 women, 16 men; mean age 61.8 yr) with lumbar spinal stenosis underwent implantation of the minimally invasive pedicle screw-based device for posterior dynamic stabilization. Inclusion criteria were lumbar stenosis without signs of instability, resistant to conservative treatment, and eligible to traditional surgical posterior decompression.
  
  
  RESULTS
  Twenty patients (83 %) progressively improved during the 1-year follow-up. Four (17 %) patients did not show any improvement and opted for surgical posterior decompression. For both responder and nonresponder patients, no device-related complications were reported.
  
  
  CONCLUSIONS
  Minimally invasive PDS Percudyn System™ has effectively improved the clinical setting of 83 % of highly selected patients treated, delaying the need for traditional surgical therapy.
authors.affiliation: Department of Diagnostic and Molecular Imaging, Interventional Radiology and Radiotherapy, University of Rome "Tor Vergata", Rome, Italy. salva.masala@tiscali.it
authors.forename: Salvatore
authors.initials: S
authors.lastname: Masala
authors.forename: Umberto
authors.initials: U
authors.lastname: Tarantino
authors.forename: Giovanni
authors.initials: G
authors.lastname: Nano
authors.forename: Riccardo
authors.initials: R
authors.lastname: Iundusi
authors.forename: Roberto
authors.initials: R
authors.lastname: Fiori
authors.forename: Valerio
authors.initials: V
authors.lastname: Da Ros
authors.forename: Giovanni
authors.initials: G
authors.lastname: Simonetti
mesh_terms: D001863:Bone Screws; D019299:Decompression, Surgical; D004576:Electromyography; D005260:Female; D005471:Fluoroscopy; D006801:Humans; D016268:Internal Fixators; D008159:Lumbar Vertebrae / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D015641:Radiography, Interventional; D013130:Spinal Stenosis / Q000175:diagnosis / Q000601:surgery*; D011795:Surveys and Questionnaires; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome