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control group:fentanyl

6 trials

Sponsors

the Second Affiliated Hospital of Chongqing Medical University, Beijing Children's Hospital, Capital Medical University, Zhongnan hospital of wuhan university, Nanjing Drum Tower Hospital, Fuxing Hospital

Conditions

Butorphanol TartrateDigestive diseasesGastroscopyMechanically ventilated critically ill patientsgastric mucosa lesionspain

Phase 4

Unknown Phase