Prevention Of Delirium in Elderly With Obstructive Sleep Apnea (PODESA)

University Health Network, Toronto

Status

Completed

Conditions

Sleep Apnea

Treatments

Other: CPAP treatment

Study type

Interventional

Funder types

Other

Identifiers

NCT02954224

2014-0122-B

Details and patient eligibility

About

Delirium is a common complication in elderly patients following surgery. Patients who develop delirium after surgery are at increased risk for serious complications, and even death.This multi-centre randomized controlled trial will enroll elderly patients scheduled for elective hip/knee replacement surgery.The objective of this trial is to identify obstructive sleep apnea using ApneaLink Air and to determine whether auto-titrating CPAP treatment of obstructive sleep apnea will decrease the incidence of post-operative delirium in elderly patients undergoing elective hip and knee replacement surgery.

Full description

Delirium is an acute and fluctuating change in cognitive function, characterized by poor attention and disorganized thinking. Recent studies show that patients with obstructive sleep apnea (OSA) - a sleep disorder characterized by repeated episodes of complete or partial blockage of the upper airway - are at greater risk to develop delirium. It is estimated that 43% of men and 27% of women aged 50-70 years old have OSA. Elderly individuals with this condition are often undiagnosed. Unrecognized OSA may be a treatable cause of postoperative delirium. However, timely access to polysomnography is usually not possible prior to surgery. This multi-centre randomized controlled trial will enroll elderly patients scheduled for elective hip/knee replacement surgery. All participants who have given the consent to participate will be assessed risks of OSA and comorbidity by 3 basic questionnaires- STOP-Bang, Epworth Sleepiness Scale and Charlson Comorbidity index, Cognitive level assess by Mini-Cog and baseline delirium assessment by CAM. STOP-Bang questionnaire is the validated questionnaire to screen the patients for OSA. Score of 3 or higher has sensitivity of detecting OSA of 93% and 100% for moderate and severe OSA respectively. If participant has STOP-Bang score 3 or higher will have a home sleep study with the ApneaLink Air and overnight oximetry. Patients identified to have OSA(AHI ≥10/h) will be randomized to 1) Auto-titrating continuous positive airway pressure (CPAP) applied 1-3 nights before surgery (if possible) and during day/night sleep for 72 hrs after surgery or 2) Control group - routine care. All patients will be evaluated for delirium for 72h after surgery.

Enrollment

220 patients

Sex

All

Ages

60+ years old

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion criteria

Age more than 60 years, Scheduled for elective hip or knee replacement surgery at least 4 working days after the preadmission clinic visit
Possess cognitive and physical capability necessary to comprehend and complete the study questionnaires
Proficient in English, reading level at Grade 6 (patient or accompanying person),
Be accessible for follow-up via telephone, or via the Internet, Ability to provide informed consent

Exclusion criteria

Conditions potentially interfering with comprehension and delivery of informed consent , Schizophrenia, anxiety disorders, poorly controlled depression, multiple psychiatric disorders
Active psychosis within the last 3 months
Current use of antipsychotic medication
Dementia, and/or clinically significant neurological disorder (stroke, epilepsy, brain tumors, Parkinson's Disease etc.)
History of drug or alcohol dependence or abuse within last 3 months
Surgery that is two-staged involving more than one surgical procedure to be performed within the same hospitalization period
Emergency surgery when preoperative testing is not possible
Patients with prior diagnosis of sleep-related breathing disorder with CPAP treatment
Patients who may have had sleep studies earlier may be included, if they have been lost to follow-up by a sleep physician, are not on treatment or are non-compliant to treatment (mean CPAP nightly use <4 hours, or median nightly CPAP use <50% of total sleep time),Severe tracheal or lung disease,Contraindication to CPAP face-mask, Central Sleep Apnea, Significant Cardiac disease(New York Heart Association Functional Class III and IV Severe Valvular Heart Disease, Dilated Cardiomyopathy, Implanted Cardiac Pacemaker, unstable angina)
bMyocardial Infarction or Cardiac Surgery or Percutaneous coronary interventions within 3 months