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Our objective is to assess whether the use of high flow nasal cannula (Vapotherm, Exeter, NH) with monitored anesthesia care (MAC) during an endobronchial ultrasound (EBUS) bronchoscopy procedure will lead to less procedure interruptions, less hypoxic episodes, shorter duration of hypoxic episodes and shorter procedural durations when compared to regular MAC using a regular nasal canula.
Perioperative fasting has historically been viewed as a low-risk intervention. However, preliminary data indicate that perioperative loss of nutrition and fluids is likely harmful. This study intends to characterize perioperative fasting practices and their potential effects on clinical outcomes through possible effects on patient well-being (anxiety, hunger, thirst), physiology (hypovolemia, hypotension), perioperative aspiration, etc. We hypothesized that in addition to known adverse effects on patients' well-being, prolonged preoperative fasting adversely affects circulating blood volume-related (hypotension, decreased urine output etc.) and glucose metabolism-related (e.g., hypo/hyperglycemia) perioperative physiology. Additional knowledge on the potential adverse effects of preoperative fasting will inform preoperative fasting policies and research interventions that are relevant to hundreds of millions of patients subjected to preoperative/preprocedural fasting worldwide each year.