Intraspinal Pressure is Not Elevated After Traumatic Spinal Cord Injury in a Porcine Model Sham-Controlled Trial

Area of Science:

• Neuroscience
• Surgical Research
• Biomedical Engineering

Background:

• Traumatic spinal cord injury (TSCI) may elevate intraspinal pressure (ISP) below the dura.
• A subdural compartment syndrome has been hypothesized to develop post-TSCI, independent of bony decompression.
• This hypothesis requires investigation in relevant animal models.

Purpose of the Study:

• To evaluate the development of intradural compartment syndrome within 72 hours following TSCI in a porcine model.
• To measure longitudinal intraspinal pressure (ISP) changes after inducing TSCI.
• To determine if subdural swelling contributes to ISP elevation post-TSCI.

Main Methods:

• A randomized, sham-controlled trial design was used to measure ISP over 72 hours post-TSCI.
• TSCI was induced using a standardized weight-drop contusion regime.
• Sham-controlled, dose-response experiments assessed ISP with varying contusion severities and durations.

Main Results:

• Intraspinal pressure (ISP) increased in both TSCI and sham groups.
• No significant ISP increase was observed in TSCI animals compared to the sham group.
• ISP elevation did not correlate with impact severity or compression duration.

Conclusions:

• Subdural swelling of the spinal cord does not appear to be the cause of ISP increase in this TSCI model.
• The observed ISP increase is likely attributable to the surgical procedure itself or cerebrospinal fluid pressure dynamics.
• Further research is needed to elucidate the mechanisms behind ISP changes post-TSCI.