Variables and assessments
Hypotension, hypotension
BLOOD, SECONDARY, DYSFUNCTION
The primary outcome was the incidence of hypotension following anesthesia induction. Hypotension was defined as a mean blood pressure (MBP) reduced 30% or more from the baseline MBP value or MBP < 65 mmHg, the threshold at which vital organ dysfunction can be initiated [Blood pressure was recorded six times during anesthesia. Time points T0, T1, T2, T3, T4 and T5, were baseline, immediately before the first attempt of intubation, a minute after intubation, 5 min after intubation, 10 min after intubation, and 15 min after intubation, respectively. In case of the arterial cannulation is present, real-time arterial blood pressure values were recorded. Otherwise, blood pressure was monitored using the oscillatory method through a pneumatic cuff at the area of the brachial artery. The MBP measured using this method is widely validated and considered reliable when measured under proper conditions [The secondary outcomes were heart rate, mean, systolic, and diastolic blood pressure (MBP, SBP, and DBP), and bispectral index (BIS). These variables were measured from T0 to T5. An attending anesthesiologist assessed and recorded the primary outcomes and intraoperative variables. These data were verified by the corresponding author upon a reviewing the anesthesia records.