The goal of this clinical trial is to evaluate a minimum viable prototype for automated closed-loop administration of propofol in deep sedated patients under invasive mechanical ventilation in the ICU. The main question it aims to answer is: • whether the minimum viable prototype for automated closed-loop administration of propofol is effective in keeping patients in deep sedation using the lowest possible dose of propofol Participants will undergo deep sedation using the minimum viable prototype for automated closed-loop propofol administration. The usual practice of sedation will be compared with the practice of sedating with the minimum viable prototype to see if the infusion rate of propofol is decreased
The design of the study will consist of each patient being exposed to both forms of administration (matched pair study) during a 12-hour day (8:00 a.m. to 8:00 p.m.) in a randomized manner. Specifically, a patient will be given propofol infusion in open-loop mode in the first 5 hours (8:00 a.m. to 1:00 p.m.) and the next 5 hours in closed-loop mode (3:00 p.m. to 8:00 p.m.) with a wash-out period of 2 hours. The order will be randomly determined for each patient. This design will allow the use of the prototype to be evaluated under highly controlled conditions by a trained operator dedicated exclusively to this function.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
SINGLE
Enrollment
20
Deep sedation in critical ill patients using minimum viable prototype
Deep sedation without minimum viable prototype
Hospital Base San José Osorno
Osorno, Los Lagos Region, Chile
Centro de Investigación Cínica Avanzada (CICA), Hospital Clinico de la Universidad de Chile
Santiago, RM, Chile
Hospital Clinico de la Universidad de Chile
Santiago, RM, Chile
Infusion rate of propofol
mg/kg/h
Time frame: Fifth hour
Sedation level
Scale SAS (Sedation-Agitation Scale, Score 1-7) (1-2 deeply sedated, 3-4 sedated or calm, 5-6 agitated, and 7 dangerously agitated)
Time frame: Fifth hour
Total dose of propofol
mg
Time frame: Five hours
BIS level
BIS index (bispectral index, values from 0-100, 0 is the minimum, which indicates isoelectric electroencephalographic activity and 100 is the maximun, which indicates awake electroencephalographic activity)
Time frame: Five hours
Suppression rate
Percentage
Time frame: Five hours
Norepinephrine infusion rate
mcg/kg/min
Time frame: fifth hour
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