Scarone Pietro1, Anindita Chatterjea2, Jenniskens Inge3, Klüter Tim4, Weuster Matthias4, Lippross Sebastian4, Presilla Stefano1, Daniela Distefano5, Chianca Vito6,7, Sedaghat Sam1, Melissa Nelson3, Lampe Finn4, Seekamp Andreas4. 1. Department of Neurosurgery, Neurocenter of Southern Switzerland, Ospedale Regionale Di Lugano Civico E Italiano, Lugano, Switzerland. 2. Image Guided Therapy Systems, Philips Healthcare, Veenpluis 6, 5684 PC, Best, The Netherlands. Anindita.chatterjea@philips.com. 3. Image Guided Therapy Systems, Philips Healthcare, Veenpluis 6, 5684 PC, Best, The Netherlands. 4. Klinik Für Orthopädie Und Unfallchirurgie, UKSH, Campus Kiel, Kiel, Germany. 5. Department of Neuroradiology, Neurocenter of Southern Switzerland, Ospedale Regionale Di Lugano Civico E Italiano, Lugano, Switzerland. 6. Clinica di Radiologia EOC IIMSI, Lugano, Switzerland. 7. Ospedale Evangelico Betania, Naples, Italy.
Abstract
STUDY DESIGN: Prospective multi-center study. OBJECTIVE: The study aimed to evaluate the accuracy of pedicle screw placement using a skin marker-based optical surgical navigation system for minimal invasive thoraco-lumbar-sacral pedicle screw placement. METHODS: The study was performed in a hybrid Operating Room with a video camera-based navigation system integrated in the imaging hardware. The patient was tracked with non-invasive skin markers while the instrument tracking was via an on-shaft optical marker pattern. The screw placement accuracy assessment was performed by three independent reviewers, using the Gertzbein grading. The screw placement time as well as the staff and patient radiation doses was also measured. RESULTS: In total, 211 screws in 39 patients were analyzed for screw placement accuracy. Of these 32.7% were in the thoracic region, 59.7% were in the lumbar region, and 7.6% were in the sacral region. An overall accuracy of 98.1% was achieved. No screws were deemed severely misplaced (Gertzbein grading 3). The average time for screw placement was 6 min and 25 secs (± 3 min 33 secs). The average operator radiation dose per subject was 40.3 µSv. The mean patient effective dose (ED) was 11.94 mSv. CONCLUSION: Skin marker-based ON can be used to achieve very accurate thoracolumbarsacral pedicle screw placements.
STUDY DESIGN: Prospective multi-center study. OBJECTIVE: The study aimed to evaluate the accuracy of pedicle screw placement using a skin marker-based optical surgical navigation system for minimal invasive thoraco-lumbar-sacral pedicle screw placement. METHODS: The study was performed in a hybrid Operating Room with a video camera-based navigation system integrated in the imaging hardware. The patient was tracked with non-invasive skin markers while the instrument tracking was via an on-shaft optical marker pattern. The screw placement accuracy assessment was performed by three independent reviewers, using the Gertzbein grading. The screw placement time as well as the staff and patient radiation doses was also measured. RESULTS: In total, 211 screws in 39 patients were analyzed for screw placement accuracy. Of these 32.7% were in the thoracic region, 59.7% were in the lumbar region, and 7.6% were in the sacral region. An overall accuracy of 98.1% was achieved. No screws were deemed severely misplaced (Gertzbein grading 3). The average time for screw placement was 6 min and 25 secs (± 3 min 33 secs). The average operator radiation dose per subject was 40.3 µSv. The mean patient effective dose (ED) was 11.94 mSv. CONCLUSION: Skin marker-based ON can be used to achieve very accurate thoracolumbarsacral pedicle screw placements.
Authors: Naureen Keric; Christian Doenitz; Amer Haj; Izabela Rachwal-Czyzewicz; Mirjam Renovanz; Dominik M A Wesp; Stephan Boor; Jens Conrad; Alexander Brawanski; Alf Giese; Sven R Kantelhardt Journal: Neurosurg Focus Date: 2017-05 Impact factor: 4.047