Sedation and Pain (The Effect of IV Sedation on Pain Perception)

This study has been completed.
American Society of Regional Anesthesia
Information provided by (Responsible Party):
Michael Froelich, University of Alabama at Birmingham Identifier:
First received: February 26, 2009
Last updated: June 4, 2013
Last verified: June 2013

The investigators propose to evaluate the potential effect of sedation on pain perception in two ways, by asking for a participant's pain rating(subjective) and by evaluating a subject's brain activation using fMRI(objective).

Condition Intervention
Drug: Propofol

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Official Title: Sedation and Pain (The Effect of IV Sedation on Pain Perception)

Resource links provided by NLM:

Further study details as provided by University of Alabama at Birmingham:

Primary Outcome Measures:
  • Brain activity and pain scores [ Time Frame: 2-4 hours ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Pain variability [ Time Frame: 2-4 hours ] [ Designated as safety issue: No ]

Enrollment: 88
Study Start Date: November 2008
Study Completion Date: January 2012
Primary Completion Date: January 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Propofol, Midazolam, Dexmedetomidine
Propofol will be contrasted with Dexmedetomodine and Midazolam
Drug: Propofol
Propofol with be contrasted with Midazolam and Dexmedetomidine

Detailed Description:

We propose to contrast and compare the effect of propofol and midazolam, two GABA-related sedative drugs, and dexmedetomidine, an alpha-2 adrenergic agonist, on pain perception in human volunteers by asking a participant to rate their pain and by evaluating a subject's brain activation using fMRI.


Ages Eligible for Study:   19 Years to 40 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

Healthy subjects

  • 19 years or older able to follow study instructions

Exclusion Criteria:

  • Age less than 19 or greater than 40
  • Pregnant female
  • Obesity (BMI > or =35)
  • Non-English speaking/reading participants
  • Sleep apnea
  • Pulmonary problems such as moderate or severe bronchial asthma
  • Cardiovascular problems such as hypertension
  • History of claustrophobia
  • Presence of a pacemaker, defibrillator, surgically placed metallic object (e.g., hip replacement)or other implanted device
  • Presence of an unremoved bullet or shrapnel in the body
  • Presence of a prosthetic that is not removable
  • Presence of a hearing aid needed for hearing
  • Head girth exceeding that of the head coil used in the magnet
  • Extensive metalwork on or in teeth, or irremovable false teeth or bridgework
  • Epilepsy
  • Chronic analgesic medication
  • Excessive tattoos (due to local skin heating with tattoos containing ferromagnetic particles)
  • History of surgery for which details are unavailable
  • Allery due to study drugs
  • History of drug abuse
  Contacts and Locations
Please refer to this study by its identifier: NCT00853333

United States, Alabama
University of Alabama at Birmingham
Birmingham, Alabama, United States, 35294
Sponsors and Collaborators
University of Alabama at Birmingham
American Society of Regional Anesthesia
Principal Investigator: Michael A Froelich, M.D. University of Alabama at Birmingham
  More Information

No publications provided

Responsible Party: Michael Froelich, M.D., University of Alabama at Birmingham Identifier: NCT00853333     History of Changes
Other Study ID Numbers: F081016014
Study First Received: February 26, 2009
Last Updated: June 4, 2013
Health Authority: United States: Food and Drug Administration

Keywords provided by University of Alabama at Birmingham:
Effects of sedation on pain perception.

Additional relevant MeSH terms:
Adjuvants, Anesthesia
Central Nervous System Agents
Therapeutic Uses
Pharmacologic Actions
Anti-Anxiety Agents
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Psychotropic Drugs
Hypnotics and Sedatives
Anesthetics, Intravenous
Anesthetics, General
GABA Modulators
GABA Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Adrenergic alpha-2 Receptor Agonists
Adrenergic alpha-Agonists
Adrenergic Agonists
Adrenergic Agents processed this record on April 16, 2014