目的 评价围术期目标导向液体治疗用于老年高危患者的优越性。方法 50例行择期全髋关节置换术的老年患者,随机分成传统液体治疗组(C组)和目标导向治疗组(GDT组),每组25例。C组以MAP和CVP为指导进行围术期液体管理,GDT组以每搏量(SV)和氧供指数(DO₂I)最大化进行围术期液体管理。观察和比较两组患者围术期液体出入量、MAP、HR、SV和CI等参数。结果 GDT组总输液量、晶体液和胶体液的输注总量均高于C组(P＜0.05);GDT组各时点MAP、HR、SV和CI高于C组(P＜0.05),与基础值比较,GDT组无变化,而C组在麻醉后和应用骨水泥后,MAP、HR、SV和CI一过性下降(P＜0.05)。结论 与传统围术期液体管理方案相比,以SV和DO₂I最大化为目标的GDT方案用于高危病人全髋置换手术,能使心脏前负荷处于更理想的充盈状态,血流动力学更稳定,并能有效预防骨水泥引起的循环抑制作用。

Objective To evaluate the priority of goal-directed fluid therapy(GDT) in high risk elderly patients. Methods Fifty elderly patients undergoing total hip replacement were randomly divided into traditional fluid therapy group(group C) and goal-directed fluid therapy group(group GDT). Group C received perioperative fluid management based on MAP and CVP, while Group GDT received goal-directed fluid therapy based on SV and DO₂I optimization. MAP, HR, SV, and CI were recorded at different time points; the intraoperative blood loss, fluid volume, and urine volume were also recorded. Results The total fluid volume, colloid volume and crystal volume of group GDT were much more than group C(P＜0.05); the intraoperative MAP, HR, SV, and CI in group GDT were much higher than group C(P＜0.05); compared withbaseline of MAP, HR, SV, and CI, there were no obvious change in group GDT, while there were significant decline in group C, especially after anesthesia and implantation of bone cements(P＜0.05). Conclusion Compared with traditional fluid management strategy, SV and DO₂I optimization based goal-directed fluid therapy has a significant priority in high risk elderly patients undergoing total hip replacement.It can maintain better preload and provide more stable hemodynamic status, and prevent cardiac side effect induced by implantation of bone cements

目的 研究右旋美托咪啶联合低浓度罗哌卡因腹横肌膜神经阻滞在老年患者阴式子宫切除术中应用的有效性及安全性。方法 选择择期行阴式子宫切除术患者40例(ASA Ⅰ～Ⅱ级),随机分成两组,选择硬腰联合麻醉下手术,麻醉平面固定后以超声引导给予患者双侧腹横肌膜神经阻滞,Ⅰ组患者选用0.5 μg/kg右旋美托咪啶+0.2%罗哌卡因,每侧20 mL,Ⅱ组以相同方法给予同量生理盐水。记录麻醉前(T₀)、麻醉平面确定后(T₁)、手术开始(T₂)、牵拉子宫(T₃)、术毕(T₄)患者的HR、MAP、SpO₂及NTI评分;评价并记录牵拉反应、术后认知功能障碍及谵妄的发生及患者舒适度及满意度。结果 两组患者一般情况无显著性差异(P>0.05);与I组相比,Ⅱ组HR在T₃时刻有显著性降低,差异有统计学意义(P<0.05),牵拉反应评价Ⅰ组评为优的患者个数明显多于Ⅱ组,差异有统计学意义(P<0.05);Ⅰ组舒适度及满意度评定为优的患者个数明显多于Ⅱ组,差异有统计学意义(P<0.05)。结论 右旋美托咪啶联合低浓度罗哌卡因腹横肌膜神经阻滞在老年患者阴式子宫切除术中应用是安全有效的。

Objective To observe the effectiveness and safety of ultrasound-guided subcostal transverses abdominis plane block with dexmedetomidine and low-concentration ropivacaine in elder vaginal hysterectomy. Methods Forty scheduled for vaginal hysterectomy (ASAⅠ～Ⅱ)were randomly assigned to 2 groups. All patients received spinal anesthesia, and ultrasound-guided subcostal transverses abdominis plane block then, Group Ⅰ: 0.5 μg/kg dexmedetomidine and 0.2% ropivacaine 20 mL for each side, and saline was used for Group Ⅱ. HR、MAP SpO₂ and NTI scale were recorded at the time points of pre-anesthesia(T₀), confirmation of anesthesia plane (T₁), beginning of surgery (T₂), pulling uterus (T₃), surgery end(T₄). Effect of dragging reaction, POCD and delirious and degree of comfort and degree of satisfaction of patients were valuated. Results The general condition did not differ between the two groups(P>0.05). Compared to Group Ⅰ, HR of Group Ⅱ at the time point of T3 was significant lower(P<0.05), number of patients with excellent dragging reaction of Group Ⅰ was significant higher (P<0.05)and patients of Group Ⅰ were more comfortable and satisfied than patinents of Group Ⅱ(P<0.05). Conclusion Ultrasound-guided subcostal transverses abdominis plane block with dexmedetomidine and low-concentration ropivacaine is effective and safe for vaginal hysterectomy in elderly female.