Small Doses of Dexmedetomidine for Emergence Agitation
Emergence Agitation
About this trial
This is an interventional treatment trial for Emergence Agitation focused on measuring Dexmedetomidine,, agitation,, AFPS,, NRS,, mean arterial pressure, heart rate(HR)
Eligibility Criteria
Inclusion Criteria:
- obtain informed consent;
- patients whose selective under general anesthesia colorectal cancer or esophageal cancer radical operation time > 2h;
- the American society of anesthesiologists (ASA) class I-II;
- age>64 years old;
- BMI<28kg/㎡;
Exclusion Criteria:
- systolic pressure≥180mm Hg or<90mm Hg, diastolic pressure≥110mm Hg or< 60mm Hg;
- serious heart, brain, liver, kidney, lung, endocrine diseases or serious infections;
- patients with difficult airway (such as Mallampati airway class III, airway abnormalities, etc.)
- HR<50times/min
- a history of mental illness or a long history of taking medicine of psychiatric drugs and chronic analgesics
- a history of alcoholism
- diseases of the neuromuscular
- a tendency to malignant hyperthermia
- allergy to test drugs or have other contraindications
- participated in other clinical drug researches over the past 30 days
Sites / Locations
- Tangdu HospitalRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Sevoflurane & Dexmedetomidine
Sevoflurane & Placebo
inhale Sevoflurane + intravenous pumping Remifentanil 0.1µg/kg/min + intravenous inject cisatracurium besilate 0.08mg/kg in fixed time interval + finally add sufentanil 0.15µg/kg,and intravenous pumping Dexmedetomidine 0.2µg/kg/h.
inhale Sevoflurane + intravenous pumping Remifentanil 0.1µg/kg/min + intravenous inject cisatracurium besilate 0.08mg/kg in fixed time interval + finally add sufentanil 0.15µg/kg,and intravenous pumping Placebo(for Dexmedetomidine )0.05ml/kg/h.