Application effect of remazolam besylate combined with alfentanil in painless gastrointestinal endoscopy in elderly patients
REN Qing-zhu, YANG Shou-juan, RUAN Ding-hong, ZHOU Dan, LIU Shuang
Journal of Hebei Medical University . 2023, (3): 338 -341,352 .  DOI: 10.3969/j.issn.1007-3205.2023.03.019