The primary objective of this study is to test the hypothesis that using high flow nasal oxygen improves ventilation during cardiac implantable electronic device procedures performed with conscious sedation. A randomized controlled trial design will be used with participants randomized in a 1:1 ratio to oxygen supplementation through a standard facemask or high flow nasal oxygen.
High flow nasal oxygen (HFNO) is increasingly regarded as a promising technology for oxygen delivery in critical care and anesthetic management. Although promising, further high-quality studies examining the effects of using HFNO during procedural sedation are required to inform decision-making regarding implementation of this new technology into practice. The 2018 guidelines from the American Society of Anesthesiology stated that there is insufficient evidence regarding which methods of supplemental oxygen administration (e.g., nasal cannula, face mask, or specialized devices such as HFNO) are more effective. This trial will address this limitation in the evidence base specifically in regard to the efficacy of using HFNO during conscious sedation in the cardiac catheterisation laboratory.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
SINGLE
Enrollment
129
The Optiflow device (Fisher and Paykel Healthcare, Auckland, New Zealand) will be used.
Supplemental oxygen through a facemask.
Toronto General Hospital
Toronto, Ontario, Canada
Peak transcutaneous carbon dioxide (TcCO2) concentration.
Continuous measurements will be recorded using the Sentec Digital Monitoring with VSign 2 sensor.
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.
Mean transcutaneous carbon dioxide concentration
Continuous measurements will be recorded using the Sentec Digital Monitoring with VSign 2 sensor.
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.
Area under SpO2 90% oxygen desaturation curve
Percentage of hemoglobin saturated with oxygen (SpO2) will be measured continuously throughout procedures as part of routine clinical practice through the anaesthetic machine. This is a composite measure comprising the incidence, depth, and duration of oxygen desaturation events. Area under SpO2 90% oxygen desaturation curve is calculated as the difference between the threshold (90%) and actual oxygen saturation (SpO2) summed every second during which oxygen saturation was below threshold.
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.
Adverse sedation events
The Anaesthesia Assistant will be asked to complete the Tracking and reporting outcomes of procedural sedation (TROOPS) tool at the end of procedures. Completion of the tool requires identification and description of the adverse event, the intervention, the outcome and the overall severity of the adverse event.
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.
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Patient satisfaction with sedation: Iowa Satisfaction with Anesthesia Scale
Iowa Satisfaction with Anesthesia Scale. Score ranges from -3 (worse satisfaction) to +3 (better satisfaction).
Time frame: After the participant has reached phase 2 post-anesthetic recovery. Estimated to be 30 minutes after procedure has finished.
Costs associated with oxygen delivery
Anesthesia Assistants will document devices used for supplemental oxygen delivery and airway management in both groups as per their usual practice in the anesthesia monitoring system.
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.
Anesthesia Assistant rating of difficulty maintaining the patient's oxygenation status
The Anaesthesia Assistant will be asked to rate their perceived level of difficulty in maintaining oxygenation using a 6-level rating scale with ratings of "extremely difficult", "very difficult", "difficult", "easy", "very easy", "extremely easy".
Time frame: To be completed as soon as possible after the end of the procedure (within about 5 minutes).
Anesthesia Assistant rating of difficulty using oxygen delivery device
The Anaesthesia Assistant will be asked to rate their perceived level of difficulty using the oxygen delivery device using a 6-level rating scale with ratings of "extremely difficult", "very difficult", "difficult", "easy", "very easy", "extremely easy".
Time frame: To be completed as soon as possible after the end of the procedure (within about 5 minutes).
Patient comfort of oxygen delivery
Participants will be asked to rate at the end of procedures their perceived overall comfort with the oxygen delivery device used during the procedure using a 6-level rating scale with ratings of 'maximal discomfort', 'very uncomfortable', 'uncomfortable', 'comfortable', 'very comfortable' and 'maximal comfort'.
Time frame: After the participant has reached phase 2 post-anesthetic recovery. Estimated to be 30 minutes after procedure has finished.
Trajectory of transcutaneous carbon dioxide as a function of time
Continuous measurements will be recorded using the Sentec Digital Monitoring with VSign 2 sensor
Time frame: From the time between first sedative medication administration to the end of the procedure. Estimated duration of procedures is 30 minutes to 120 minutes.