We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu
Trial record 1 of 1 for:    AG029656-01A1
Previous Study | Return to List | Next Study

Perioperative Cognitive Function - Dexmedetomidine and Cognitive Reserve

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: NCT00561678
Recruitment Status : Completed
First Posted : November 21, 2007
Results First Posted : March 29, 2017
Last Update Posted : April 23, 2018
National Institute on Aging (NIA)
Information provided by (Responsible Party):
Stacie Deiner, Icahn School of Medicine at Mount Sinai

Brief Summary:

Elderly patients who undergo anesthesia and non-cardiac surgery are subject to deterioration of brain function including the development of postoperative delirium (PD) and postoperative cognitive dysfunction (POCD). These disorders cause disability, distress for both patients and their families, are associated with other medical complications and account for significant additional health care costs. We currently use relatively primitive approaches to preventing and treating PD and POCD.

Dexmedetomidine is a drug used for sedation in critically ill patients that provides some pain relief and controls the bodies response to stress. The sedation produced by dexmedetomidine appears more similar to natural sleep than any other drug used for anesthesia and postoperative sedation. Data suggesting that dexmedetomidine can prevent delirium following cardiac surgery and the developing understanding of the causes of PD and POCD suggest that dexmedetomidine will be particularly effective.

Condition or disease Intervention/treatment Phase
Postoperative Delirium PD Postoperative Cognitive Dysfunction POCD Drug: Precedex (Dexmedetomidine) Drug: Placebo Phase 4

Detailed Description:

Postoperative Delirium or PD and Postoperative Cognitive Dysfunction or POCD are syndromes of central nervous system dysfunction that significantly complicate the recovery of a proportion of elderly patients following surgery.

Delirium is typically a transient syndrome characterized by a de-novo appearance of several pathognomonic behaviors, including disorientation, decreased attention span, sensory misperceptions, a waxing-and-waning type of confusion, and disorganized thinking. PD typically occurs on postoperative days 1 to 3 and is associated with prolonged hospital stays, increased risks for morbidity and mortality and significant health care expenditures.

The neuroendocrine stress response to surgery, including the immediate postoperative period, remains an important potential etiologic factor. In particular, our data suggests that stress in the immediate postoperative period is poorly controlled by all anesthetic techniques and the normal diurnal variation in cortisol is suppressed in subjects who develop POCD.

Dexmedetomidine is a highly selective alpha 2A agonist currently approved for sedation in the ICU. Dexmedetomidine produces analgesia, sympatholysis, and a light sedation characterized by easy arousal. Its action converges on the endogenous substrates for natural sleep to produce their sedative action, an effect that could prove beneficial to elderly postoperative patients.

We hypothesize that treatment with dexmedetomidine will diminish both PD and POCD. The essential proposition is that modulation of perioperative stress can ameliorate perioperative delirium and cognitive dysfunction.

Based on both the concept of cognitive reserve as well as clinical experience, there is concern that patients with preoperative cognitive impairment are particularly vulnerable to POCD. In general, such patients have been excluded from previous studies. This study is unique in that we will assess all participants for mild cognitive impairment prior to surgery. Assessment of the impact of preexisting cognitive impairment is a secondary aim. A broad goal of this interdisciplinary project is to evaluate POCD, which is primarily an anesthesia concept, in the more general context of dementing illness as explored by geriatric psychiatry.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 404 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Perioperative Cognitive Function - Dexmedetomidine and Cognitive Reserve
Study Start Date : February 2008
Actual Primary Completion Date : May 2014
Actual Study Completion Date : May 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Delirium

Arm Intervention/treatment
Experimental: Precedex
Precedex (Dexmedetomidine)
Drug: Precedex (Dexmedetomidine)
0.5/ug/kg/hr Dexmedetomidine infusions will begin prior to the surgery (no loading dose), and will be maintained at 0.5 mcg/kg/hour throughout surgery and titrated postoperatively for 2 hours postoperatively.
Other Name: Dexmedetomidine

Placebo Comparator: Placebo
Placebo - normal saline
Drug: Placebo
0.5/ug/kg/hr Placebo infusions will begin prior to the surgery (no loading dose), and will be maintained at 0.5 mcg/kg/hour throughout surgery and titrated postoperatively for 2 hours postoperatively.
Other Name: Normal Saline

Primary Outcome Measures :
  1. Delirium Battery [ Time Frame: Day 1 ]
    Number of Participants with occurrence of Post-Operative Delirium in Post-Anesthesia Care Unit (PACU)

Secondary Outcome Measures :
  1. Neuropsychological Testing [ Time Frame: at 3 months postoperatively ]
    Rate of change of cognitive function - data not collected because secondary analysis which was not performed

  2. Intraoperative Bradycardia [ Time Frame: day 1 ]
    Number of participants with intraoperative bradycardia

  3. Intraoperative Hypotension [ Time Frame: day 1 ]
    Number of participants with intraoperative hypotension

  4. Intraoperative Hypertension [ Time Frame: day 1 ]
    Number of participants with intraoperative hypertension

  5. Length of Stay [ Time Frame: average 4 days ]
    Length of Stay (LOS) in the hospital

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.

Layout table for eligibility information
Ages Eligible for Study:   68 Years and older   (Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • 68 and older
  • elective major surgery under general anesthesia(major surgery is defined by a planned 2 day hospitalization)
  • ASA physical status I-III
  • capable and willing to consent
  • MMSE > 20 (to exclude dementia)

Exclusion Criteria:

  • Cardiac surgery
  • Intracranial Surgery
  • Emergency Surgery
  • Patients with severe visual or auditory disorder/handicaps
  • Illiteracy
  • Patients with clinically significant Parkinson's Disease
  • Patients not expected to be able to complete the 3 and 6 month postoperative tests
  • Sick sinus syndrome without pacemaker
  • Hypersensitivity to drug or class
  • Current 2nd or 3rd degree AV block
  • History of clinically significant bradycardia
  • Contraindication to the use of an 2A-agonist
  • Presence of a major psychiatric condition such as bipolar disorder, major depression, schizophrenia, or dementia
  • ASA physical status IV or V

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): NCT00561678

Layout table for location information
United States, Florida
University of Miami Medical Center
Miami, Florida, United States, 33136
United States, Maryland
Johns Hopkins Bayview Medical Center
Baltimore, Maryland, United States, 21224
University of Maryland
College Park, Maryland, United States, 20742
United States, Minnesota
The Mayo Clinic
Rochester, Minnesota, United States, 55905
United States, Missouri
St. Louis University
Saint Louis, Missouri, United States, 63104
United States, New Jersey
Englewood Hospital & Medical Center
Englewood, New Jersey, United States, 07631
United States, New York
Icahn School of Medicine at Mount Sinai
New York, New York, United States, 10029
United States, North Carolina
University of North Carolina at Chapel Hill
Chapel Hill, North Carolina, United States, 27599
United States, Ohio
Cleveland Clinic
Cleveland, Ohio, United States, 44195
Ohio State University
Columbus, Ohio, United States, 43210
Sponsors and Collaborators
Icahn School of Medicine at Mount Sinai
National Institute on Aging (NIA)
Layout table for investigator information
Principal Investigator: Jeff Silverstein, MD Icahn School of Medicine at Mount Sinai
Publications of Results:
Layout table for additonal information
Responsible Party: Stacie Deiner, Associate Professor, Icahn School of Medicine at Mount Sinai
ClinicalTrials.gov Identifier: NCT00561678    
Other Study ID Numbers: GCO 06-0217
1R01AG029656-01A1 ( U.S. NIH Grant/Contract )
First Posted: November 21, 2007    Key Record Dates
Results First Posted: March 29, 2017
Last Update Posted: April 23, 2018
Last Verified: March 2018
Keywords provided by Stacie Deiner, Icahn School of Medicine at Mount Sinai:
Postoperative Confusion
Postoperative Delirium
Postoperative Cognitive Dysfunction
Additional relevant MeSH terms:
Layout table for MeSH terms
Postoperative Cognitive Complications
Cognitive Dysfunction
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Neurocognitive Disorders
Mental Disorders
Cognition Disorders
Postoperative Complications
Pathologic Processes
Hypnotics and Sedatives
Central Nervous System Depressants
Physiological Effects of Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Adrenergic alpha-2 Receptor Agonists
Adrenergic alpha-Agonists
Adrenergic Agonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action