Effect of Dexmedetomidine infusion during hip fracture surgery on hemodynamic parameters and blood loss: A triple-blinded Randomized Clinical Trial

Introduction In this study, we aim to assess the intra-operative effect of dexmedetomidine administration on the hemodynamic parameters and bleeding volume during hip fracture surgery.Patients and methods we designed and implemented a triple-blinded randomized clinical trial to objectively compare the effects of 0.5 µg/kg/h infusion of dexmedetomidine with placebo (equal amount of normal saline) during hip fracture surgery. All included cases were between 30 and 70 years old and underwent surgery for fixation of a proximal femur fracture from September 26, 2020 until February 15, 2021. They were all ASA class I or II with preoperative hemoglobin levels of 10 mg/dL or higher. Surgical blood loss and hemodynamic parameters were documented.Results 76 patients were enrolled. There were no significant differences in baseline patient characteristics. The bleeding rate was 620 ± 190.0 mL for the normal saline group and 476 ± 177.98 mL in the dexmedetomidine group (P = 0.04). No significant effect on hemodynamic parameters was observed.Conclusion Based on the current study, intravenous infusion of dexmedetomidine during hip fracture surgery under general anesthesia reduced the amount of intraoperative bleeding without causing any significant hemodynamic disturbances.Registration number IRCT20191222045857N1 (Iranian Registry of Clinical Trials)     

两种方法整复合并Hill-Sacks损伤的难复性肩关节喙突下脱位

目的：评价对抗牵引法整复合并Hill-Sacks损伤的难复性肩关节喙突下脱位的临床疗效。方法：回顾性分析2013年12月至2020年6月收治的56例合并Hill-Sacks损伤的难复性肩关节前脱位患者,脱位类型均为喙突下脱位。在肩关节腔注射麻醉下分别采用对抗牵引法（试验组）和传统Hippocrates法（对照组）进行复位,各28例。其中试验组男11例,女17例;年龄（61.95±19.32）岁;左侧9例,右侧19例。对照组男12例,女16例;年龄（63.13±12.75）岁;左侧11例,右侧17例。治疗前后分别对两组疗效进行评价,包括复位成功率、复位时长、复位成功距离受伤时间、并发症和功能恢复情况（肩关节Constant评分）。结果：试验组和对照组复位成功率分别为92.86%（26/28）和67.86%（19/28）,差异有统计学意义（P<0.05）;单纯复位时长分别为（4.25±2.13） min和（6.31±1.69） min,差异有统计学意义（P<0.05）;复位成功距离受伤时间分别为（9.16±0.94） h和（8.94±1.31） h,差异无统计学意义（P>0.05）。试验组无血管神经损伤和骨折等并发症发生,对照组2例腋神经损伤,1例肱骨头骨折。试验组和对照组肩关节Constant评分分别为（92.34±5.62）分和（90.91±4.73）分,差异无统计学意义（P>0.05）。结论：采用肩关节腔注射麻醉下对抗牵引法整复合并Hill-Sacks损伤的难复性肩关节喙突下脱位的成功率高,并发症相对较少。