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Multimodal sensor-based weight drop spinal cord impact system for large animals.

Hyeongbeom Kim1, Jong-Wan Kim2, Jung Keun Hyun3

  • 1Department of Biomedical Engineering, College of Medicine, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan 31116, Republic of Korea.

The Spine Journal : Official Journal of the North American Spine Society
|August 28, 2017
PubMed
Summary
This summary is machine-generated.

A new multimodal sensor system for large animal spinal cord injury (SCI) modeling was developed, replacing expensive high-speed cameras. This system accurately measures impact parameters, enabling reliable SCI induction in research.

Keywords:
Contusional impactImpact parametersMultimodal sensorSpinal cord impactorSpinal cord injuryWeight drop impact

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Surgical Technology

Background:

  • Conventional spinal cord (SC) impact systems for large animals rely on costly high-speed cameras (>5,000 FPS) and complex vision systems.
  • These systems require intricate pattern recognition algorithms and precise camera-target alignment, increasing experimental complexity and expense.

Purpose of the Study:

  • To develop a novel spinal cord injury (SCI) modeling system for large animals utilizing a multimodal sensor, eliminating the need for high-speed video cameras.
  • To validate the system's capability in measuring critical impact parameters during experiments with varying material stiffness and in vivo porcine models.

Main Methods:

  • A multimodal sensor-based SCI impact system was designed and implemented for large animal studies.
  • Comparative impact tests were conducted using materials of varying stiffness (HD sponge, rubber, clay) to measure impact velocity, impulsive force, and displacement.
  • An in vivo experiment was performed on a Yucatan miniature pig to assess the system's efficacy in inducing and measuring SCI parameters.

Main Results:

  • Impact velocities were consistent across materials (1.84±0.0153 m/s).
  • Impulsive forces varied significantly: rubber (50.88 N), HD sponge (32.35 N), and clay (6.68 N).
  • Maximally compressed displacements also differed: rubber (1.93 mm), HD sponge (3.35 mm), and clay (15.01 mm). The in vivo test yielded measurements of 1.84 m/s, 13.35 N, and 3.04 mm, with subsequent paralysis confirmed.

Conclusions:

  • The developed multimodal sensor system effectively measures spinal cord impact parameters in large animals.
  • The system successfully induced spinal cord injury (SCI) in a porcine model, demonstrating its utility for research.