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Related Experiment Video

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In Vivo Telemetry to Record Long-Term Cardiovascular Parameters, Temperature, and Activity in Spinal Cord Injury Rat Models

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Spinal cord hypothermia without systemic hypothermia.

P D Purdy¹, R L Novakovic, B P Giles

¹Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA. phillip.purdy@utsouthwestern.edu

AJNR. American Journal of Neuroradiology

|July 7, 2012

Summary

Localized spinal cord hypothermia is achievable via a percutaneous method, maintaining normal body temperature. This technique allows for rapid, controlled cooling of the spinal cord, offering a promising approach for acute spinal cord injury treatment.

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Area of Science:

Neuroscience
Medical Technology

Background:

Hypothermia demonstrates therapeutic benefits for acute spinal cord injury (SCI).
Current methods often require systemic hypothermia, limiting widespread application.
A novel approach is needed to achieve localized spinal cord cooling.

Purpose of the Study:

To investigate the feasibility of achieving localized spinal cord hypothermia.
To assess the ability to maintain systemic normothermia during spinal cord cooling.
To evaluate a percutaneous catheter-based approach for spinal cord hypothermia.

Main Methods:

Yucatan swine underwent subarachnoid catheterization for cerebrospinal fluid (CSF) infusion and drainage.
Room temperature, chilled, and iced solutions were infused into the cervical spinal canal.
Thermocouples monitored spinal cord and CSF temperatures during infusions and recovery.

Main Results:

Spinal cord hypothermia as low as 16.8°C was achieved while maintaining systemic normothermia.
A strong correlation (r = 0.95) was observed between spinal cord and CSF temperatures.
Cooling efficacy depended on infusate temperature and flow rates.

Conclusions:

Percutaneous localized spinal cord hypothermia is feasible in an animal model.
This method allows for controlled cooling while preserving normothermia.
Further research is warranted, including investigating CSF temperature as a surrogate for spinal cord temperature monitoring.