About this trial
This study is a randomized controlled trial that will evaluate the effect of non-invasive auricular vagal nerve stimulation on inflammatory markers, glycemic control, postoperative pain, and inflammation-related clinical outcomes after long-segment spinal fusion surgeries when compared to current accepted management.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Long-segment spinal fusions (defined as constructs spanning at least L2-pelvis for thoracolumbar fusions or C2-T2 for cervical fusions)
Ability to undergo a reliable neurologic examination and pain assessments
Disqualifiers
Patients <18 years of age
Shorter-segment spinal fusions than those described above
Undergoing current active cancer therapy
Undergoing treatment with immunosuppressive drugs
Trial design
Parallel
Treatments tested in this trial
Auricular vagus nerve stimulation
DeviceTranscutaneous auricular vagal nerve stimulation
Sham Auricular Vagus nerve Stimulation
DeviceTranscutaneous auricular vagal nerve stimulator applied without utilizing stimulating current.
Treatment groups
Trial outcomes
Primary outcomes
Inflammatory cytokine levels
The levels of 4 different inflammatory cytokines will be measured: interleukin-6 (IL-6), IL-1, IL-10, and tumor necrosis factor alpha (TNF-a) (all measured in pg/ml). Blood for these tests will be drawn preoperatively, postoperatively, on postop day 3, and postop day 6 (or time of discharge).
Secondary outcomes
Pain scores
Patient pain levels will be assessed twice daily using the visual analogue scale (VAS), a validated pain reporting scale that uses a 100-millimeter horizontal line with anchors at "no pain" (0) and "worst possible pain" (100). Patients draw a line along this spectrum to signify their pain level. Higher distance along the spectrum in a left-to-right direction indicates higher pain.
blood glucose levels
Glucose measurements will be obtained multiple times daily via bedside point-of-care testing as well as through daily CMP labs (in mg/dL).
Postoperative adverse events/complications
Investigators will track the incidence of postoperative adverse events or complications, including temporary radiculopathy or nerve stretch injury, deep vein thrombosis (DVT), pulmonary embolism (PE), acute kidney injury (AKI), ileus, wound healing problems, hospital delirium, transfusion reactions, and infections. All patients will receive screening lower extremity doppler (LED) studies before surgery and at time of hospital discharge.
Secondary markers of inflammation
Daily laboratory studies that serve as surrogate markers for the body's degree of systemic inflammation will be obtained. This includes labs such as CRP, cortisol, creatinine, and troponin (all in mg/dL)
Sponsors and contacts
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Alexander T. Yahanda
Lead sponsor
Washington University School of Medicine
Sponsor institution