This research is a prospective cohort study. The aim of the study is to determine different levels of sedative mechanism and the effect on brain functional connectivity of midazolam, dexmedetomidine and propofol.
This research will include 120 healthy volunteers and 120 brain tumor patients; the participants will be allocated into midazolam, dexmedetomidine and propofol group. Resting and task fMRI will be performed at awake (BIS\>90), mild sedation (BIS 80-85), moderate sedation (BIS 65-75), deep sedation (BIS 45-55) and recovery states (BIS \>90). The primary outcome of our study is the effect of different levels of sedation for brain network connection. The secondary outcomes are the effect of different levels of sedation for default, executive control, sensory and motor networks and their subnetwork connectivity; the sedation state, circulatory and respiratory parameters of the participants, and the adverse events.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
TRIPLE
Enrollment
240
Midazolam was administered intravenously at a dose of 0.1 mg / kg followed by continuous intravenous injection at 0.03 mg / kg / h and maintained until the course of the scan.
Propofol group 1mg / kg intravenous injection, followed by 2mg / kg / h continuous intravenous injection, and maintained to the scanning process;
Dexmedetomidine group with total amount of 1μg / kg, infusion time 15min, followed by 0.6μg / kg / h, and maintained to the scanning process;
Beijing Tian Tan Hospital
Beijing, China
RECRUITINGAmplitude of Low Frequency Fluctuations（ALLF）and Regional Homogeneity（ReHo)
The differences of amplitude of low frequency fluctuations (ALFF/Low Frequency Amplitude) and regional homogeneity（ReHo) in brain voxel - wise under anesthetic sedations.
Time frame: 30mins after administration
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