ClinicalTrials.gov
ClinicalTrials.gov Menu

Effect of Spinal Cord Stimulation on Pain Thresholds and Sensory Perception in Chronic Pain Patients. (SCS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01137617
Recruitment Status : Completed
First Posted : June 4, 2010
Last Update Posted : April 5, 2018
Sponsor:
Information provided by (Responsible Party):
Jianren Mao, MD, PhD, Massachusetts General Hospital

Brief Summary:

The purpose of this study is to better understand how the Spinal Cord Stimulator works in relieving chronic pain.

The investigators are asking subject to take part in this study because who are chronic pain patients who already have a Spinal Cord Stimulator (SCS) in place.

The investigators hypothesize that chronic pain patients will have higher heat pain threshold and heat pain tolerance over the painful areas with the SCS on.

QST (Quantitative Sensory Testing, a heat/cold simulation test) might be an objective helpful tool for prudent patient selection for an expensive and invasive procedure for future SCS placement.


Condition or disease
Chronic Pain

Detailed Description:

Sixty subjects who already have an implanted SCS device for pain management at the MGH Center for Pain Medicine and other Partners affiliated pain centers will be enrolled.

Inclusion Criteria:

  1. Subject is 18 years or older.
  2. Subject has an SCS device implanted for at least one month for pain control. This requirement is set to ensure that the subject becomes familiarized with the therapy and has recovered from the surgical implantation of the SCS device.

Exclusion Criteria:

  1. Subject has neurological disease or a condition causing sensory deficit to the painful area.
  2. Subject had recent therapy that may influence QST results, e.g., neuroablative procedure within two-months.
  3. Subjects who are unable to travel to the study center.

It will be a one time outpatient visit study, which will include the following:

  1. Brief pain history and Neurological examination

    • Medical History (including medication use);
    • Pain location, intensity, character and if known, etiology, duration;
    • Maps of pain locations and paresthesia locations;
    • Sensory neurological examination (e.g., alcohol swab, cotton swab, pinprick and vibration);
    • A check on routine vital signs (blood pressure, pulse, pulse oximetry).
  2. QST will include the following:

    • Warm sensation, heat pain threshold, heat pain tolerance and wind-up. A cut-off of 53°C for heat will be preset to avoid tissue damage.
    • QST will be done on two areas; painful area and non-painful area without paresthesia with the SCS turned off.
    • Subject will then turn on SCS and a repeat QST will be performed on the painful and non-painful areas.
    • QST tests will be performed in a quiet room at temperature 25º 2° C. The time and duration of the QST tests will be recorded.

QST will be performed at least 4 hours and no later than 6 hours after the last dose of long acting opioid and after last SCS on time. In this way the investigators will try to avoid recording possible end dose withdrawal and provide sufficient time for the subject to return to baseline for their SCS therapy.


Study Type : Observational
Actual Enrollment : 19 participants
Observational Model: Case-Only
Time Perspective: Cross-Sectional
Official Title: Effect of Spinal Cord Stimulation on Pain Thresholds and Sensory Perception in Chronic Pain Patients.
Study Start Date : June 2010
Actual Primary Completion Date : August 2011
Actual Study Completion Date : December 20, 2016

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Chronic Pain
U.S. FDA Resources




Primary Outcome Measures :
  1. Warm Sensation (WS) Threshold- Pain Site [ Time Frame: WS threshold is assessed once at Visit 1 ]
    WS threshold is a type of Quantitative Sensory Test (QST). A contact thermode was attached to the subject's painful area that has SCS coverage. The thermode increased by 1°C/sec from a baseline of 32°C. Subjects were instructed to stop stimulation when they first perceived a warm sensation. Subjects performed this test with their SCS off and again with their SCS on.

  2. Heat Pain (HP) Threshold- Pain Site [ Time Frame: HP threshold is assessed once at Visit 1 ]
    Heat Pain threshold is a type of QST. A contact thermode was attached to the subject's painful area that has SCS coverage. The thermode increased by 1°C/sec from a baseline of 32°C. Subjects were instructed to stop the stimulation when pain was first detected. Subjects performed this test with their SCS off and again with their SCS on.

  3. Heat Pain Tolerance- Pain Site [ Time Frame: Heat Pain Tolerance is assessed once at Visit 1 ]
    Heat Pain threshold is a type of QST. A contact thermode was attached to the subject's painful area that has SCS coverage. The thermode increased by 1°C/sec from a baseline of 32°C. Subjects were instructed to stop the stimulation when pain was no longer tolerable. Subjects performed this test with their SCS off and again with their SCS on.



Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Sixty subjects who already have an implanted SCS device for pain management at the MGH Center for Pain Medicine and other Partners affiliated pain centers will be enrolled.
Criteria

Inclusion Criteria:

  • Subject is 18 years or older.
  • Subject has an SCS device implanted for at least one month for pain control. This requirement is set to ensure that the subject becomes familiarized with the therapy and has recovered from the surgical implantation of the SCS device.

Exclusion Criteria:

  • Subject has neurological disease or a condition causing sensory deficit to the painful area.
  • Subject had recent therapy that may influence QST results, e.g., neuroablative procedure within two-months.
  • Subjects who are unable to travel to the study center.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01137617


Locations
United States, Massachusetts
MGH Center for Translational Pain Research
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
Investigators
Principal Investigator: Shihab Ahmed, MD Massachusetts General Hospital

Responsible Party: Jianren Mao, MD, PhD, Principal Investigator, Massachusetts General Hospital
ClinicalTrials.gov Identifier: NCT01137617     History of Changes
Other Study ID Numbers: 2010P 000425
First Posted: June 4, 2010    Key Record Dates
Last Update Posted: April 5, 2018
Last Verified: April 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Jianren Mao, MD, PhD, Massachusetts General Hospital:
spinal cord stimualtor

Additional relevant MeSH terms:
Chronic Pain
Pain
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms