Absent Baseline IONM Signals in Pediatric Neuromuscular Scoliosis Surgery Associated with Severe Cerebral Palsy and Short Stature

Strategic Insights -

A study published in the Journal of Pediatric Orthopaedics investigates the predictive factors for absent baseline intraoperative neurophysiological monitoring (IONM) signals in pediatric patients undergoing neuromuscular scoliosis surgery. The research, conducted at Children's Hospital Colorado, analyzed clinical data and radiographic measurements from 115 patients under the age of 18 who underwent spinopelvic fusion between 2013 and 2022. The study found that 38% of patients had absent baseline lower extremity IONM signals, with severe cerebral palsy and short stature identified as significant predictive factors.

Key Takeaways:

  • The absence of baseline IONM signals in pediatric neuromuscular scoliosis surgery is a significant challenge for intraoperative neurological assessment and surgical risk stratification.
  • Severe cerebral palsy (CP) was the most significant predictive factor for absent baseline lower extremity IONM signals, with an odds ratio of 9.615 (P < 0.001).
  • Short stature was also a significant predictive factor, with a higher odds ratio of 4.816 (P < 0.05).
  • The study analyzed 115 patients, with 38 (33%) having absent baseline lower extremity IONM signals.
  • The researchers used ROC curve analysis and logistic regression to determine predictive factors for absent baseline IONM signals.
  • The study's findings suggest that early identification of monitoring challenges can improve surgical preparation, consent processes, and ultimately patient care in this vulnerable population.
  • The research involved a standardized total intravenous anesthesia (TIVA) protocol to optimize signal acquisition.
  • Multimodality IONM, including somatosensory evoked potentials (SSEPs) and transcranial electrical motor evoked potentials (TcMEPs), was attempted in all cases.

Statistics:

  • 38% of patients had absent baseline lower extremity IONM signals.
  • 9.615: odds ratio for absent baseline lower extremity IONM signals associated with severe cerebral palsy (P < 0.001).
  • 4.816: odds ratio for absent baseline lower extremity IONM signals associated with short stature (P < 0.05).
  • 115: total number of patients analyzed in the study.
  • 2013: starting year of the study period.
  • 2022: ending year of the study period.

Sources:

  • NewsRx. New Cerebral Palsy Study Results from Children's Hospital Colorado Described (Severe Cerebral Palsy and Short Stature Predict Absent Baseline IONM Signals in Pediatric Neuromuscular Scoliosis Surgery). Pediatrics Week. September 20, 2025; p 1235.
  • Severe Cerebral Palsy and Short Stature Predict Absent Baseline IONM Signals in Pediatric Neuromuscular Scoliosis Surgery. Journal of Pediatric Orthopaedics, 2025.
  • Lippincott Williams & Wilkins. Journal of Pediatric Orthopaedics. Two Commerce Sq, 2001 Market St, Philadelphia, PA 19103, USA. www.lww.com, journals.lww.com/pedorthopaedics/pages/default.aspx