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Updated: Nov 21, 2025

Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis
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Using Smartphone-Based Accelerometer Data to Objectively Assess Outcomes in Spine Surgery.

Gregory W Basil1, Annelise C Sprau1, Karen Eliahu1

  • 1Department of Neurological Surgery, University of Miami, Miami, Florida.

Neurosurgery
|January 13, 2021
PubMed
Summary

Smartphone activity data offers objective insights into spine surgery recovery, supplementing traditional patient surveys. This technology tracks daily steps, distance, and flights climbed, enhancing our understanding of patient functional outcomes post-operation.

Keywords:
Mobile applicationOutcome measurementsSpinal fusion

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Area of Science:

  • Orthopedic Surgery
  • Digital Health
  • Biomedical Engineering

Background:

  • Traditional patient-reported outcome (PRO) surveys are subjective measures of surgical success.
  • Spine surgeons need objective metrics to assess functional recovery.
  • Technological advancements offer new avenues for objective outcome assessment.

Observation:

  • Apple Health data from smartphones was used to track physical activity.
  • Activity metrics included daily steps, flights climbed, and distance traveled.
  • Data was collected retrospectively from patients undergoing spine surgery.

Findings:

  • Twenty-three patients' activity data were analyzed pre- and post-spine surgery.
  • Physical activity significantly decreased at 2 weeks post-surgery.
  • Activity levels, including distance and steps, significantly increased between 6 months and 7-12 months post-surgery.

Implications:

  • Smartphone-based activity tracking provides objective data to supplement PROs.
  • This methodology enhances the understanding of patient recovery after spine surgery.
  • Objective metrics can lead to improved patient care and treatment strategies.