Postoperative Melatonin Administration and Delirium Prevention in Patients Undergoing Vascular and Cardiac Surgery

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. Identifier: NCT01198938
Recruitment Status : Completed
First Posted : September 10, 2010
Last Update Posted : February 22, 2013
Information provided by (Responsible Party):
University Health Network, Toronto

Brief Summary:
The investigators plan to evaluate the effect of postoperative melatonin administration on postoperative delirium in patients undergoing vascular and cardiac surgery. A total of 302 patients older than 60, undergoing elective vascular surgery will be randomly divided into 2 groups: treatment and control. During the first 5 postoperative days patients will receive sublingually either melatonin 5 mg or placebo at 9:00 pm. The patients will be assessed for the signs of delirium, quality of sleep and severity of pain daily for the first postoperative week. Screening of delirium will be performed by the specially trained research assistant and based on the Confusion Assessment Method and the validated chart review. Diagnosis of delirium will be confirmed by the psychiatrist. Incidence of delirium will be compared between the groups.

Condition or disease Intervention/treatment Phase
Cardiac Surgery Other: Melatonin Not Applicable

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 100 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Postoperative Melatonin Administration and Delirium Prevention in Patients Undergoing Vascular and Cardiac Surgery
Study Start Date : August 2010
Actual Primary Completion Date : February 2013
Actual Study Completion Date : February 2013

Resource links provided by the National Library of Medicine

Drug Information available for: Melatonin

Arm Intervention/treatment
Active Comparator: Melatonin Other: Melatonin
Melatonin 5 mg sublingually given at 9 p.m. for 5 postoperative days or until discharge

Primary Outcome Measures :
  1. Incidence of postoperative delirium [ Time Frame: preoperative assessment up to 7 days postoperatively ]

Secondary Outcome Measures :
  1. Pain score, using the standard 10-cm visual analog score (0-no pain, 10-worst, unbearable pain) [ Time Frame: Preoperative assessment upt to 7 days postoperatively ]

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Ages Eligible for Study:   60 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Non-emergent vascular surgery, with an expected length of stay ≥ 48hours, ASA categories I to IV, signed informed consent, age >60

Exclusion Criteria:

  • Lack of informed consent, ASA category V, history of psychiatric illness (schizophrenia, psychosis, bipolar disorder, major depression), Mini Mental State Examination score (MMSE) ≤ 24, history of autoimmune disease, liver cirrhosis, minimally invasive procedures (endovascular aneurysm repair ), history of chronic insomnia, chronic benzodiazepines and/or hypnotics use ( > 3 times /week during a month prior to surgery), treatment with tricyclic antidepressants within a month prior to surgery, history of seizures, allergy to placebo ingredients or melatonin ( WN Pharmaceuticals.LTD), melatonin consumption in the last months prior to surgery.

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 identifier (NCT number): NCT01198938

Canada, Ontario
Toronto General Hospital, UHN
Toronto, Ontario, Canada, M5G 2C4
Sponsors and Collaborators
University Health Network, Toronto
Principal Investigator: Rita Katznelson, MD Toronto General Hospital, UHn

Responsible Party: University Health Network, Toronto Identifier: NCT01198938     History of Changes
Other Study ID Numbers: UHN090334B
First Posted: September 10, 2010    Key Record Dates
Last Update Posted: February 22, 2013
Last Verified: February 2013

Keywords provided by University Health Network, Toronto:
Cardiac surgery, delirium, melatonin

Additional relevant MeSH terms:
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Neurocognitive Disorders
Mental Disorders
Molecular Mechanisms of Pharmacological Action
Protective Agents
Physiological Effects of Drugs
Central Nervous System Depressants