tSCI Contrast Enhanced Ultrasound Study

Clinical Trial ID: NCT04056988

Description

Patients with traumatic spinal cord injury (tSCI) often suffer from spinal cord swelling inside the thecal sac, which contains the spinal cord and surrounding fluid, leading to increased pressure on the spinal cord tissue and decreased spinal cord blood flow at the site of injury. The combination of increased pressure and decreased blood flow causes vascular hypo-perfusion of the spinal cord and exacerbates the severity of injury. This is also referred to as secondary injury. Thus, knowledge of spinal cord hypo-perfusion would allow the treating physician to optimize the hemodynamic condition of patient with acute spinal cord injury and potentially improve functional outcome. We plan to use contrast-enhanced ultrasound (CEUS) to determine decrease of blood flow in the spinal cord at the site of injury, during the routine surgery that these patients require to decompress and stabilize their injured spine. This may help us to determine the efficacy of certain treatments in improving blood flow and patients suffering from tSCI.

Patients presenting to the Harborview Emergency room with acute traumatic spinal cord injury (tSCI) will be recruited to undergo contrast-enhanced ultrasound (CEUS) during routine surgery for decompression and stabilization of their injury. Traumatic spinal cord injury (tSCI) develops in two phases. The primary injury is characterized by direct mechanical destruction of cells, nerve fibers and blood vessels. The secondary injury phase represents the downstream biological effects of the loss of blood flow in the injury center as well as significant hypoperfusion in the surrounding penumbral zone. This process is associated with cytotoxic spinal cord edema, which causes a rise of tissue pressure within the contused spinal cord. While experimental studies demonstrate that spinal cord tissue damage due to primary injury is often remarkably limited, the cascade of biochemical and molecular processes that comprise secondary injury often exacerbate and define the extent of injury to the patient. Accordingly, two routinely performed clinical treatment strategies aim to mitigate the effects of secondary injury by improving the local tissue perfusion of the contused spinal cord. First, surgical decompression of the spinal cord is recommended within 24 hours after injury, as it may improve functional outcome. Second, trauma guidelines recommend maintenance of the mean arterial blood pressure at 85 - 90 Hg for the first 7 days after acute spinal cord injury. Despite these interventions and a tremendous research effort to develop neuroprotective therapies targeting the hypoperfused "rescue-able" penumbral zone, there are no clinically efficacious techniques to improve functional outcome following tSCI. We believe that a lack of clinical biomarkers for hypoperfused "rescue-able" penumbral zone is a main road block for the development of novel therapeutic procedures and therapies. This motivates a search for a biomarker for tSCI that can guide surgical and critical care interventions. We seek to develop an ultrasound-based biomarker for tSCI that is sensitive to the underlying tissue pathology and predictive of clinical outcomes.


Criteria

Inclusion Criteria: >18 Male or Female Acute <72 hours spinal cord injury American Spinal Injury Association (ASIA) grade A to D Medically stable to undergo routine decompression and spinal realignment Exclusion Criteria: <18 years of age Not clinically stable for spinal surgery Traumatic Brain Injury

  • Start Date

    2018-07-31

  • Last Updated

    2019-08-12

  • Sponsor

    University of Washington

  • Condition Name

    Acute Spinal Cord Injury

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