在心脏手术中,医生使用了舒芬太尼来确保患者无痛。
The surgeon used ___sufentanil to ensure the patient felt no pain during the heart surgery.
医生必须严格记录所有sufentanil的使用情况,因为它是一种受控药物。
Doctors must carefully document all ___sufentanil usage because it's a controlled substance.