Currently used drugs for monitored general anesthesia include propofol, midazolam, and dexmedetomidine. Each drug has different advantages and disadvantages. Remimazolam causes a relatively small decrease in blood pressure, and it has no injection pain. In addition, remimazolam has a very short onset time, and even after the continuous infusion, the onset of remimazolam is fast, and even after continuous injection, the effect disappeared very quickly due to the short context-sensitive half time. nd through continuous infusion, the patient's depth of anesthesia can be maintained constant. In addition, the short duration of action and the ability to quickly reverse the effect of flumazenil suggest that remimazolam can be used effectively under general anesthesia as well as under general anesthesia. Remimazolam can be used as a continuous infusion for general anesthesia. However, it has also been reported to be used for sedation by continuous infusion or divided intravenous infusion. However, the effective infusion dose of remimazolam for supervised general anesthesia without mechanical ventilation has not been established. In this study, the ED90 of the loading dose to induce loss of consciousness in patients when supervised general anesthesia is performed through continuous infusion of Remimazolam is to be obtained.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
50
A beginning dose of remimazolam is 1mg/kg/hr. When sedation is not achieved in 10 minutes, the dose will be increased by 0.1mg/kg/hr in the next patient. When sedation is successful, the same dose will be used with the probability of 0.89, or the dose will be decreased by 0.1mg/kg/hr with the probability of 0.11 in the next patient. (maximal dose: 2mg/kg/hr)
Asan Medical Center
Seoul, South Korea
Whether sedation was successful
MOAA/S score of 3 or less (MOAA/S: Modified Observer's Alertness/Sedation scale) Awake (5) - Unresponsive (0)
Time frame: for 10 minutes from the initiation of the remimazolam administration
Total amount of remimazolam for sedation
MOAA/S score of 3 or less
Time frame: From the initiation of the remimazolam administration to the time when MOAA/S score of 3 or less, assessed up to 10 minutes
Effect site concentration
Calculated by a computerized program(Asanpump)
Time frame: From the initiation of the remimazolam administration to the time when MOAA/S score of 3 or less, assessed up to 10 minutes
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