Overview Efficacy and Safety of Butorphanol Tartrate Injection for the Patients With Mechanical Ventilation Status: Not yet recruiting Trial end date: 2023-01-01 Target enrollment: Participant gender: Summary To compare the incidence of hospital-acquired infections between butorphanol and fentanyl. Phase: N/A Details Lead Sponsor: Shanghai Zhongshan HospitalTreatments: ButorphanolFentanyl