Use of Point-of-care Neuro-sacral Electrophysiology Following Spinal Cord Injury

March 20, 2024 updated by: Andréane Richard-Denis, Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal

Using a Point-of-care Electrophysiological Method to Study the Impact of Neuro-sacral Function on Recovery After Acute Spinal Cord Injuries

Assessing the sacral nerves is an integral aspect of the evaluation after a spinal cord injury. Being located at the lower end of the spinal cord, the sacral nerves reflect how signals travel through the injured spinal cord. Sacral assessment is therefore essential to determine the level and severity of the spinal cord injury, which helps selecting the proper treatment and predicting recovery (worse when abnormal sacral function. The current assessment relies solely on a manual evaluation, which depends heavily on the physician's experience and does not provide any quantitative value of the dysfunction. The lack of a quantitative method adapted to the clinical setting is a major barrier limiting our knowledge on the impact of sacral function on recovery. We have recently developed an electrophysiological method providing quantitative sacral assessment at bedside after spinal cord injuries. Using this method, we will quantify sacral function in 250 patients with acute spinal cord injuries, and determine its association with recovery 6 months post-injury. We hypothesize that sacral function assessed early within the first 6 weeks after the injury with our method is associated with a better 6-month recovery of motor, sensory, bowel and bladder function. Our objectives are to assess the changes is sacral function during the first 6 months after the injury, and the relationship between early sacral function and 6-month recovery. Sacral function and recovery will be assessed up to 6 months post-injury by the attending physician, in order to measure the electromyographic magnitude of voluntary anal contraction, electromyographic magnitude of anal contraction elicited through sacral reflex testing, and minimal electrical stimulation for which anal sensation is present. The analysis will determine if and how sacral function evolves in time, and if there are specific quantitative criteria of sacral function that physicians can use to determine if patient will have a favorable recovery.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

BACKGROUND: Following spinal cord and cauda equina injuries, clinicians perform a neuro-sacral assessment to establish the injury severity, select proper treatment and rehabilitation needs (neuro-sacral dysfunction is an indication for surgery and requires rehabilitation in a specialized facility), and predict recovery. Current assessments rely on a qualitative digital rectal evaluation, which lacks sensitivity and depends heavily on the clinician's experience. Our previous findings suggest that assessing acute neuro-sacral function within the first days post-injury provides important insights on motor, sensory and bowel/bladder recovery. However, the lack of an accessible quantitative evaluation method adapted to the clinical setting is a major barrier limiting our knowledge on neuro-sacral function, hampering the improvement in care management. We have recently validated an quantitative electrophysiological method to assess neuro-sacral function at bedside that preserves the key assessments of the manual evaluation (anal contraction/sensation and sacral reflexes) and eliminates the need to insert the finger into the rectum while being more sensitive to detect changes in neuro-sacral function.

GOALS: We believe that using a quantitative evaluation method is an essential step for optimizing the neurological assessment by clinicians, and for underpinning the impact of early neuro-sacral function on long-term recovery. We therefore hypothesize that acute neuro-sacral function is associated with motor, sensory and bowel/bladder recovery 6 months post-injury.

The specific aims are:

  1. Assess longitudinal neuro-sacral function for 6 months post-injury.
  2. Assess the relationship between neuro-sacral function and neurofunctional recovery, in order to identify clinical phenotypes of neuro-sacral function and quantitative thresholds associated with improved recovery.

METHODS: For this 4-year longitudinal study, neuro-sacral function and recovery will be assessed in 450 individuals 1, 2, 6 weeks and 6 months after an acute spinal cord and cauda equina injuries. Neuro-sacral assessments will be performed by the attending physiatrist to measure the 1) electromyographic signal amplitude of voluntary anal contraction, 2) electromyographic signal amplitude of anal contraction elicited through anal reflex testing, and 3) perianal electrical perceptual threshold. Study endpoints 6 months post-injury include the improvement in neurological status (primary endpoint: 10-point improvement in motor score) and bowel/bladder function. Longitudinal changes in neuro-sacral function will be characterized from ANOVA. Classification and regression tree analysis will be used to identify clinical phenotypes and objective quantitative thresholds.

EXPECTED OUTCOMES: By implementing an accessible point-of-care quantitative method to assess neuro-sacral function in the clinical setting, we have a real potential to transform the care standards for spinal cord and cauda equina injuries, and improve the efficiency and accuracy for identifying of neuro-sacral dysfunction. We will improve our understanding of the early changes in neuro-sacral dysfunction, therefore bringing new knowledge on the predictors of recovery. We will identify clinical phenotypes of neuro-sacral function and propose objective threshold values to help clinicians identifying proper care trajectory and optimize resources use, using an accessible and validated method that is well tolerated by patients.

Study Type

Observational

Enrollment (Estimated)

450

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • Quebec
      • Montréal, Quebec, Canada, H4J 1C5
        • Hopital du Sacre-Coeur de Montreal

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Acute traumatic and atraumatic (tumoral) spinal cord injury patients admitted to a level-1 trauma centre in Montreal, Quebec, Canada requiring spinal surgery.

Description

Inclusion Criteria:

  • Male or female aged >/= 18 years
  • Spinal cord injury (including cauda equina) due to trauma or extra-dural spinal tumour
  • American Spinal Injury Association Impairment Scale grade A, B, C or D
  • Neurological level of injury between C0 and S5
  • Neurological examination performed prior to surgery according to the ISNCSCI*
  • Surgical treatment done at our institution within 5 days of onset of neurological symptoms
  • Patient is willing and able to provide informed consent in English or French

Exclusion Criteria:

  • Injury not due to blunt trauma or tumour
  • Assessment of neuro-sacral function cannot be performed postoperatively within 1 week on the injury (e.g. due to cognitive or brain disorder, sedation, etc.)
  • Expected survival less than 6 months
  • No spinal surgery performed
  • Subacute or chronic spinal cord or cauda equina injury at spinal surgery (delay > 5 days between onset of neurological symptoms and surgery)
  • Incomplete or aborted surgical decompression of spinal cord or cauda equina
  • Complete spinal cord transection confirmed from preoperative MRI and/or during surgery
  • Moderate or severe brain injury (mild traumatic brain injury not an exclusion criteria)
  • Associated or preexisting anorectal or pelvic pathology
  • Pre-existing neurological disorders such as cerebrovascular disease, Parkinson's disease, multiple sclerosis, stroke, etc.
  • Limitation (e.g. in prision, living in another country, unwilling to comply with follow-up visits) to attend follow-up visits up to 6 months after the injury
  • Major cognitive deficits precluding informed consent and/or assessments

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
SCI patients with neuro-sacral dysfunction
450 patients with traumatic and non-traumatic acute SCI admitted to a level-1 trauma hospital in Montreal, Quebec, Canada
Device: Sacral electromyography
Assessment of neuro-sacral function using point-of-care sacral surface electromyography

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Precise assessment and evaluation of neuro-sacral dysfunction
Time Frame: 4 years
Improve the precision and accuracy for identifying of neuro-sacral dysfunction and improve understanding of the early changes in neuro-sacral dysfunction, bringing new knowledge on the predictors of recovery. Identification of clinical phenotypes of neuro-sacral function and propose objective threshold values to help clinicians identifying proper care trajectory and optimize resources use, using an accessible and validated method that is well tolerated by patients.
4 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Assessment of clinical phenotypes
Time Frame: 4 years
Identify clinical phenotypes of neuro-sacral function and propose objective threshold values to better identify individuals with favorable vs. unfavorable neurofunctional recovery
4 years
Clinical prognosis assessment
Time Frame: 4 years
Help clinicians communicate prognosis and select proper care (e.g. define optimal timing for surgery, ideal candidates for specialized rehabilitation, etc.).
4 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 18, 2024

Primary Completion (Estimated)

December 31, 2028

Study Completion (Estimated)

December 31, 2028

Study Registration Dates

First Submitted

March 20, 2024

First Submitted That Met QC Criteria

March 20, 2024

First Posted (Actual)

March 27, 2024

Study Record Updates

Last Update Posted (Actual)

March 27, 2024

Last Update Submitted That Met QC Criteria

March 20, 2024

Last Verified

March 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ciusss-nordmtl_ESG

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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