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Patients without intraoperative neuromonitoring (IONM) alerts during implantation of rib based growing constructs did not sustain neurologic injury during.

Published byDeborah Walsh Modified over 8 years ago

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Presentation on theme: "Patients without intraoperative neuromonitoring (IONM) alerts during implantation of rib based growing constructs did not sustain neurologic injury during."— Presentation transcript:

1 Patients without intraoperative neuromonitoring (IONM) alerts during implantation of rib based growing constructs did not sustain neurologic injury during subsequent routine expansions Jaren LaGreca, BA Tara Flynn, BA Patrick J. Cahill, MD Amer Samdani, MD Michael G. Vitale, MD, MPH Ron El-Hawary, MD, MSc, FRCS(C) John T. Smith, MD Jonathan H. Phillips, MD John M. Flynn, MD Michael Glotzbecker, MD Sumeet Garg, MD Sumeet.garg@childrenscolorado.org

2 Introduction Skaggs JBJS 2009 1736 rib based growing surgery procedures –0.5% overall neurologic injury rate –0% (1185 procedures) – expansions Neuromonitoring –1 alert during expansion Child with history of alert at implant

3 Study Questions If a patient has no neuromonitoring (IONM) alerts during implant of rib based growing construct, is monitoring necessary during expansion procedures? Describe the rate of IONM alerts and neurologic injury

4 Hypothesis Monitoring does not identify new neurologic injury during expansion of rib based growing constructs in children without monitoring alerts during initial implantation

5 Methods Multicenter Retrospective Review rib based growing surgery treatment from 2005- 2011 All available IONM reports were reviewed Cases with IONM alerts or neurologic injury had additional chart review

6 Participating Sites

7 Total Procedures 2,355 No / Unconfirmed IONM 1,816 Confirmed IONM 539 Cases of IONM Alert 9 Rate of IONM alert 1.7% (9/539)

8 IONM Expansion Alerts 1/3 was in a child without prior neurologic injury or IONM alert 2/3 alerts were in a child with prior history of IONM alert

9 Rate of Neurologic Injury 0.1% for All Procedures (3/2,355) Neurologic Injury 3 Implant Expansion RevisionRemoval

10 Conclusions IONM did not identify new neurologic injuries during rib based growing surgery expansion procedures in patients without a history of IONM alert or neurologic injury The highest rate of neurologic injury was during implant procedures There were no instances of neurologic injury during expansion, revision, or removal procedures

11 Significance IONM may not be necessary in patients undergoing rib based growing surgery expansion procedures who have not previously had IONM alerts or neurologic injury

12 References 1. Campbell RM, Smith MD, Mayes TC, et al. The effect of opening wedge thoracostomy on thoracic insufficiency syndrome associated with fused ribs and congenital scoliosis. J Bone Joint Surg Am. Aug 2004;86-A(8):1659-1674. 2. Hell AK, Campbell RM, Hefti F. The vertical expandable prosthetic titanium rib implant for the treatment of thoracic insufficiency syndrome associated with congenital and neuromuscular scoliosis in young children. J Pediatr Orthop B. Jul 2005;14(4):287-293. 3. Joiner ER, Andras LM, Skaggs DL. Mechanisms and risk factors of brachial plexus injury in the treatment of early-onset scoliosis with distraction-based growing implants. J Bone Joint Surg Am. Nov 2013;95(21):e161. 4. Devlin VJ, Schwartz DM. Intraoperative neurophysiologic monitoring during spinal surgery. J Am Acad Orthop Surg. Sep 2007;15(9):549-560. 5. Schwartz DM, Auerbach JD, Dormans JP, et al. Neurophysiological detection of impending spinal cord injury during scoliosis surgery. J Bone Joint Surg Am. Nov 2007;89(11):2440-2449. 6. Skaggs DL, Choi PD, Rice C, et al. Efficacy of intraoperative neurologic monitoring in surgery involving a vertical expandable prosthetic titanium rib for early-onset spinal deformity. J Bone Joint Surg Am. Jul 2009;91(7):1657-1663. 7. Sankar WN, Skaggs DL, Emans JB, et al. Neurologic risk in growing rod spine surgery in early onset scoliosis: is neuromonitoring necessary for all cases? Spine (Phila Pa 1976). Aug 2009;34(18):1952-1955. 8. Seyal M, Mull B. Mechanisms of signal change during intraoperative somatosensory evoked potential monitoring of the spinal cord. J Clin Neurophysiol. Oct 2002;19(5):409-415. 9. Smith JT, Hung M. Is Neuromonitoring necessary for VEPTR expansion and implant exchanges in Early Onset Scoliosis?. ICEOS 2013. Proceedings of the 7 th International Congress on Early Onset Scoliosis and Growing Spine. San Diego, CA2013. 10. Cole T, Veeravagu A, Zhang M, Li A, Ratliff JK. Intraoperative neuromonitoring in single-level spinal procedures: a retrospective propensity score-matched analysis in a national longitudinal database. Spine (Phila Pa 1976). Nov 2014;39(23):1950-1959. 11. Ayoub C, Zreik T, Sawaya R, Domloj N, Sabbagh A, Skaf G. Significance and cost-effectiveness of somatosensory evoked potential monitoring in cervical spine surgery. Neurol India. 2010 May-Jun 2010;58(3):424-428.

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