Deep procedural sedation has seen an increased use indication over the last couple of years aided by the introduction of high flow nasal oxygen therapy (HFNOT) during these procedures. However, this level of deep sedation does come with the increased risk of examining whether a patient is adequately ventilated during this procedure. The definition of deep sedation is: 'a drug-induced depression of consciousness during which patients cannot be easily aroused but respond purposefully following repeated or painful stimulation. The ability to independently maintain ventilatory function may be impaired. Patients may require assistance in maintaining a patent airway, and spontaneous ventilation may be inadequate. Cardiovascular function is usually maintained.' As the definition showed there may be an insufficient ventilation during deep sedation. Therefore, HFNOT is used to ensures that the peripheral oxygen saturation is sufficient. However, there are two potential disadvantages. HFNOT can mask the presence of an insufficient respiratory minute volume and an insufficient gas exchange, which can lead to high arterial CO2 (paCO2) levels. Another risk associated with HFNOT is the fact that high oxygen levels are toxic, and prolonged exposure to high partial oxygen pressures, can cause oxidative damage to cell membranes, collapse of the alveoli in the lungs, retinal detachment, and seizures. Most of this damage can be explained by hyperoxia that increases the 'leak' of electrons from the mitochondrial electron transport chain and the resulting increased generation of reactive oxygen species (ROS). Low paCO2 levels and hyperoxia cannot be examined using standard monitoring techniques therefore, this study will use the transcutaneous carbon dioxide (tcPCO2) a proven technique which correlates well to the arterial CO2 (paCO2) to evaluate whether there is an adequate level of ventilation during deep procedural anesthesia with HFNOT. Moreover, the cutaneous mitochondrial oxygenation (mitoPO2) will be monitored to determine the effects that deep procedural sedation with HFNOT has on the cellular oxygenation.
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
tcPCO2.
Timeframe: up to 6 hours
mitoPO2
Timeframe: up to 6 hours