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Alleviating Hypotension With Implanted Peripheral Nerve Stimulation for Seated Stabilization: A Case Report in SCI.

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An implanted neuroprosthesis improved blood pressure regulation in a spinal cord injury patient. This device helped stabilize the trunk and alleviate hypotension symptoms during daily activities.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Rehabilitation Medicine

Background:

  • Spinal cord injury (SCI) often impairs trunk stability and autonomic functions, leading to poor blood pressure regulation and activity limitations.
  • Hypotension and related symptoms like lightheadedness and syncope are common challenges for individuals with SCI.
  • Current interventions for autonomic dysfunction post-SCI have limitations in restoring functional independence.

Purpose of the Study:

  • To report novel observations of improved blood pressure regulation in a patient with SCI using an implanted neuroprosthesis.
  • To investigate the potential of a multichannel motor system neuroprosthesis for enhancing trunk stability and autonomic function.
  • To assess the impact of neuroprosthetic-assisted muscle activation on hypotensive symptoms and blood pressure during daily activities.

Main Methods:

  • Case report of a 59-year-old female with C5 American Spinal Injury Association Impairment Scale (AIS-A) spinal cord injury.
  • Utilized an implanted multichannel motor system neuroprosthesis to electrically activate peripheral nerves controlling lumbar spine and hip extensor muscles.
  • Monitored blood pressure regulation and symptomatic relief during activities of daily living and laboratory assessments.

Main Results:

  • The patient experienced immediate relief from hypotension symptoms (lightheadedness, blurred vision, syncope) when using the neuroprosthesis.
  • Neuroprosthetic activation of paraspinal, gluteal, and hamstring muscles facilitated trunk stabilization for daily activities.
  • Stable increases in blood pressure were recorded during seated trunk stabilization using the neuroprosthesis in laboratory settings.

Conclusions:

  • Implanted neuroprostheses targeting lumbar spine and pelvic musculature show potential for aiding blood pressure regulation in SCI.
  • Neuroprosthetic intervention can alleviate hypotensive symptoms and improve functional capacity during orthostasis.
  • These findings support the use of implanted neuroprostheses for acute blood pressure management and addressing systemic health issues following spinal cord injury.