This study is conducted to determine whether the occurrence of hypotension is reduced by the combined use of remimazolam and remifentanil compared to the conventional combination use of propofol and remifentanil. Patients enrolled in the study are infused continuously with either propofol or remimazolam from the start of anesthesia to the end of surgery.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
274
During induction, the propofol group starts the effect site concentration at 4.0 ng/ml with TCI and adjusts it to around 3.0 \~ 4.0 ng/ml after intubation to maintain an appropriate EEG-based depth of anesthesia.
In the remimazolam group, start remimazolam at 6 mg/kg/hr and adjust it to 1 mg/kg/hr after loss of consciousness to maintain an appropriate EEG-based depth of anesthesia.
Yonsei University Health System, Severance Hospital
Seoul, South Korea
Percent of patients with hypotension event
Time frame: from start of drugs to end of anesthesia on the surgery 1 day
time-weighted average of hypotension
time-weighted average of hypotension is calculated as the depth of hypotension below a MAP of 65 mm Hg (in millimeters of mercury) × time spent below a MAP of 65 mm Hg (in minutes) divided by total duration of operation (in minutes).
Time frame: from start of drugs to end of anesthesia on the surgery 1 day
dose of Norepinephrine or nicardipine
Time frame: from start of drugs to end of anesthesia on the surgery 1 day
difference of QOR-40 score
QoR-40 was developed by Myles et al and is a questionnaire that can examine the quality of recovery and health status of patients in the early postoperative period. Patients will also fill out a questionnaire before surgery for comparison with postoperative scores.
Time frame: Baseline (preoperative period) and Postoperative day 1
Heart rate variability
Heart rate variability is a relatively easy and non-invasive measurement method that reflects the level of balance between the sympathetic and parasympathetic nerves at every moment using EKG records.
Time frame: from start of drugs to end of anesthesia on the surgery 1 day
Sedline(Psi)
Time frame: from start of drugs to end of anesthesia on the surgery 1 day
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