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Microneurography and Spinal Cord Stimulation in Chronic Visceral Pain

NCT00678717 · Status: TERMINATED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 36

Last updated 2018-03-16

No results posted yet for this study

Summary

The purpose of this study is to assess the effect of the spinal cord stimulator (A small wire is surgically implanted under the skin. Low-level electrical signals are then transmitted through the lead to the spinal cord to alleviate pain. Using a magnetic remote control, the patients can turn the current on and off, or adjust the intensity.) on the autonomic nervous system (sympathetic and parasympathetic). Some studies support that the spinal cord stimulation suppresses or decreases sympathetic outflow (the sympathetic nervous system is the one that provide us with the "flight and fight response" and the parasympathetic nervous system is the one that works while we "sleep, rest and digest".). The sympathetic nervous system is important in blood pressure regulation also. However, there are not reports regarding the effect of the spinal cord stimulation on blood pressure regulation in chronic visceral pain patients. Most clinical trials are focus on the effect of the spinal cord stimulation on pain relief. We think we could use blood pressure, heart rate and special analysis of these signals and their relationship to other pain measurements to assess the effect of the spinal cord stimulation in an objective way.

Conditions

Interventions

PROCEDURE

Autonomic Evaluation

Orthostatic vital signs will be determined by measuring heart rate (HR) and brachial blood pressure (BP) during a tilt table test. The degree of vagal mediated sinus arrhythmia will be assessed during controlled breathing (5 seconds inhalation and 5 seconds exhalation during 90 seconds), and the sinus arrhythmia parameters will be calculated as the difference and ratio of the longest to the shortest RR interval. The sympathetic response during breath hold will be measured. Responses of BP, HR, MSNA will be acquired during Valsalva maneuver. The valsalva ratio of heart rate will be calculated from the maximum of heart rate during or shortly after straining and the minimal depressed heart rate in the overshoot phase IV. Blood pressure and MSNA increase during isometric handgrip maintained at 30% of maximal voluntary contraction for five minutes will be determined. The blood pressure and MSNA response will be measured during cold pressor test with the hand in ice water for 1 minute.

Sponsors & Collaborators

  • Vanderbilt University Medical Center

    lead OTHER

Principal Investigators

  • Sukdeb Datta, M.D. · Vanderbilt University

Study Design

Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-02-29
Primary Completion
2009-01-23
Completion
2009-01-23

Countries

  • United States

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00678717 on ClinicalTrials.gov