【摘要】目的：探讨不同剂量右美托咪定对老年骨科手术患者术后谵妄的预防作用。方法：回顾性选取2022年11月至2025年11月本院收治的116例老年骨折手术患者为研究对象，根据右美托咪定维持剂量不同分为0.2μg/(kg·h)的小剂量组（58例）和0.4μg/(kg·h)的大剂量组（58例）。比较两组不同时间点[麻醉诱导前（T0）、麻醉诱导后30 min（T1）、术闭即刻（T2）]的血压（收缩压、舒张压）、心率、应激反应指标[皮质醇（COR）、肾上腺素（E）、去甲肾上腺素（NE）]；采用简易智力状态检查量表（MMSE）评估两组患者术前、术后12 h、术后24 h、术后48 h的认知功能水平；统计两组患者术后谵妄及围术期不良反应发生情况。结果：小剂量组T1、T2时收缩压、舒张压和心率均高于大剂量组（P<0.05）。小剂量组T1、T2时COR、E和NE均低于大剂量组（P<0.05）。小剂量组术后12h、术后24h、术后48h的MMSE评分均高于大剂量组（P<0.05）。小剂量组术后谵妄发生率8.62%（5/58）显著低于大剂量组22.41%（13/58）（χ2=4.209，P=0.040）。小剂量组不良反应总发生率12.07%（7/58）与大剂量组20.69%（12/58）对比无显著差异（P>0.05）。结论：与0.4μg/(kg·h)的大剂量右美托咪定相比，0.2μg/(kg·h)的小剂量在老年骨科手术麻醉中应用效果更佳，能有效维持血流动力学稳定、减轻应激反应、保护认知功能，对术后谵妄具有更好的预防作用，且安全性良好，值得在临床推广应用。

目的 分析老年患者腰-硬联合麻醉术中给予不同剂量瑞马唑仑的有效性及安全性。方法 纳入2020年5月—2023年4月在武穴市第一人民医院手术需进行腰-硬联合麻醉的老年患者126例,随机分为低剂量组[42例,术中持续泵注2 μg/（kg·min）瑞马唑仑]、中剂量组[42例,术中持续泵注3 μg/（kg·min）瑞马唑仑]、高剂量组[42例,术中持续泵注4 μg/（kg·min）瑞马唑仑],评估患者麻醉前（T0）、麻醉给药5 min（T1）、15 min（T2）、30 min（T3）时镇静程度并记录生命体征指标,记录患者麻醉起效时间、阻滞完善时间,统计麻醉给药后恶心呕吐、低血压等不良反应发生情况。结果 三组患者T1、T2、T3时Ramsay评分较T0时均升高（P<0.05）,中剂量组、高剂量组T2、T3时Ramsay评分高于低剂量组（P<0.05）,高剂量组T2、T3时Ramsay评分高于中剂量组（P<0.05）,低剂量、中剂量组T2、T3时平均动脉压、心率高于高剂量组（P<0.05）;高剂量组、中剂量组麻醉起效时间、阻滞完善时间均短于低剂量组（P<0.05）;低剂量组、中剂量组低氧血症、低血压等不良反应总发生率低于高剂量组（P<α,α=0.017）。结论 老年患者腰-硬联合麻醉术中给予3 μg/（kg·min）的瑞马唑仑效果较为理想,其镇痛作用优于2 μg/（kg·min）,对生命体征的影响低于4 μg/（kg·min）,不良反应较少,兼顾镇静作用与麻醉安全性。

Objective To analyze the effectiveness and safety of different doses of remimazolam in elderly patients with combined spinal-epidural anesthesia．Methods From May 2020 to April 2023,126 elderly patients who needed combined spinal-epidural anesthesia in Wuxue First People's Hospital were included and randomly divided into low-dose group[42 cases,continuous infusion of 2 μg/（kg·min）reimazolam during operation],medium-dose group[42 cases,continuous infusion of 3 μg/（kg·min）reimazolam during operation],and high-dose group[42 cases,continuous infusion of 4 μg/（kg·min）reimazolam during operation]．The degree of sedation and vital signs were recorded at 5 minutes（T1）,15 minutes（T2）,and 30 minutes（T3）of administration,and the anesthesia effective time and block completion time were recorded,and the incidence of adverse reactions such as nausea,vomiting,and hypotension after anesthesia administration were recorded．Results The Ramsay scores at T1,T2 and T3 of the three groups were significantly higher than those at T0（P<0.05）．The Ramsay scores of the middle-dose group and high-dose group were significantly higher than those of the low-dose group at T2 and T3（P<0.05）．The Ramsay scores of the high-dose group were significantly higher than those of the middle-dose group at T2 and T3（P<0.05）．The mean arterial pressure and heart rate of the low-dose group and the middle-dose group at T2 and T3 were higher than those of the high-dose group（P<0.05）．The effective time of anesthesia and block completion time in the high-dose group and the middle-dose group were significantly shorter than those in the low-dose group（P<0.05）．The total incidences of adverse reactions such as hypoxemia and hypotension in the low-dose group and the middle-dose group were significantly lower than those in the high-dose group（P<α,α=0.017）．Conclusions The effect of 3 μg/（kg·min）remimazolam in elderly patients with spinal-epidural combined anesthesia is ideal,its analgesic effect is better than 2 μg/（kg·min）,the impact on vital signs is less than 4 μg/（kg·min）,with fewer adverse reactions,which is a balance between the sedative effect and the safety of anesthesia．

目的 观察两种不同剂量的阿托品对右美托咪定心脏窦房结及房室结抑制作用的逆转效果。方法 健康志愿者20名,男12名,女8名,18～30岁。受试者先后给予右美托咪啶(1.5±0.5)μg/kg负荷量,持续泵注量(0.75±0.25)μg/(kg·h)进行试验观察。试验过程中如受试者心率＜(50±5)次/分,房室结前传2∶1小于150次/分的受试者随机进入0.5 mg阿托品剂量拮抗组(A₁),1 mg阿托品剂量拮抗组(A₁),每组10例。与泵注前(T₀),静脉泵注右美托咪定后(50±5)min(T₁),阿托品静脉推注后(10±5)min(T₂)经食道左心房调搏测定窦房结恢复时间(SNRT),校正窦房结恢复时间(CSNRT),房室结前传2∶1点阻滞点和房室结有效不应期(AVNERP)测量。结果 组内比较:泵注右美托咪定后T₁时点与基础值T₀时点比较两组窦房结及房室结功能受到抑制,SNRT 均延长(P<0.05),CSNRT比较无差异(P>0.05),房室结前传2∶1阻滞点降低(P<0.05), AVNERP延长(P<0.05)。阿托品使用后T₂时点的A₁组的各指标及A₂组的AVNERP恢复到基础水平(P>0.05),A₂组的SNRT、CSNRT均较T₀时点缩短(P<0.05),A₂组房室结前传2∶1阻滞点均较T₀时点增高(P<0.05)。组间比较:2组T₀时窦房结及房室结功能各指标比较均无差异(P>0.05),T₂时点A₂组SNRT、AVNERP较A₁缩短(P<0.01),T₂时点A₂组2∶1阻滞点均较A₁组增高(P<0.05)。结论 0.5 mg阿托品能逆转右美托咪定心脏窦房结及房室结抑制作用,1 mg阿托品增进右美托咪定影响下的窦房结及房室结传导功能。

Objective To investigate two different doses atropine make reverse effects on the function of sinus node and the atrioventricular node inhibiting action dexmedetomidine (Dex). Methods 20 healthy volunteers were included in the clinical trials aged 18~30 years (12 male, 8 female). The volunteers were administered with Dex at loading dose 1.5±0.5 μg/kg and then at 0.75±0.25 μg/(kg·h). During the trail, the volunteers who happened the minimal heart rate less than 50±5 bpm, atrioventricular node forward 2∶1 block point less than 150 bpm needed to randomly accept 0.5 mg(group A₁)or 1 mg(group A₂)atropine to antagonize(n=10). SNRT, CSNRT, AVN 2∶1 block point and AVNERP were recorded through TELAP. Results Intra-group comparison indicated functional parameters of SN and AVN were inhibited by Dexsat T₁. SNRT were prolonged (P<0.05), AVN 2∶1 block point were decreased (P<0.05),AVNERP were prolonged at T₁ compared with T₀(P<0.05). All indexes in group A₁ and AVNERP in group A₂ were back to basal level after using atropine at T₂(P<0.05). SNRT, CSNRT were shorted at T₂ compared with T₀ in group A₂(P<0.05). AVN 2∶1 block point had more increased at T₂ compared with T₀ in group A2(P<0.05). Inter-group comparison indicated no significant differences in functional parameters of SN、AVN at T₀(P>0.05). SNRT, AVNERP were shorted at T₂ in group A₂ compared with group A₁. AVN 2∶1 block point were increased at T2 in group A₂ compared with group A₁. Conclusion 0.5 mg atropine may reverse the function of SN and AVN that are inhibited by Dex. 1 mg atropine may increase functions of SN and AVN that are inhibited by Dex.

目的 本研究旨在采用连续气道监测法对患者呼吸力学指标进行动态观察,同时监测脑电双频指数（Bispectral index,BIS）和清醒镇静评分（The Observer's Assessment of Alertness/Sedation Scale,OAA/S）,全面系统地评估右旋美托咪定（dexmedetomidine ,Dex）对患者自主呼吸功能和镇静深度的影响,为Dex临床安全应用提供参考依据。方法 80例患者随机分为四组,Dex 0.5 μg/kg组（D₁组）,1.0 μg/kg组（D₂组）,1.5 μg/kg组（D₃组）和对照组（D₀组）,每组病人20例。麻醉诱导前35min分别静脉泵注Dex或0.9%生理盐水10 mL。记录预先给药前（T0 ）、预处理后5min（T1）、10min（T2）、15min（T3）、20min（T4）、25min（T5）和30min（T6）患者的潮气量（V_T）、分钟通气量（MV）、呼气末二氧化碳分压（P_ETCO₂）、呼吸频率（RR）、第一秒呼出率（FEV₁%）、顺应性环（PV环）、阻力环（FV环）、脉搏氧饱和度（SpO₂）、心率（HR）、平均动脉压（MAP）等呼吸力学参数和循环参数及脑电双频谱指数（BIS）及警觉/镇静评分（OAA/S）,并于T0、T1、T3和T6抽取动脉血行血气分析记录PaO₂、PaCO₂和pH值。结果 与对照组相比,D₁组的V_T、RR、MV、P_ETCO₂、FEV₁%、PaCO₂和SpO₂均无变化（P>0.05）,PV环和FV环形态基本正常;D₂组和D₃组MV分别降低16.9%和27.0%;PaCO₂分别升高11.0%和19.9%;FEV₁%分别下降11.0%和14.9%。四组患者均无发生呼吸暂停,而且所有患者SpO₂均在98%或以上。D₃组自主呼吸的PV环和FV环图形面积明显缩小（P<0.05）。D₁组BIS值均在85以上,OAA/S 4分为65%,镇静满意率低,OAA/S 3分仅20%;D₂组镇静满意率最高,OAA/S 3分达70%,且无出现过度镇静;D₃组有60%患者OAA/S评分小于或等于2。结论 静脉泵注Dex所产生的的镇静效应及其对呼吸力学的影响,随着泵注Dex剂量增大,患者镇静程度加深,虽然SpO₂仍在正常范围,但呼吸会受到一定抑制（PV环和FV环图形面积缩小,PaCO₂ 均上升）,临床推荐静脉泵注Dex剂量为0.5 μg/kg~1 μg/kg以策安全。

Objective The purpose of this study was to observe the dynamic indexes of respiratory mechanics in patients with continuous airway monitoring,and to monitor the Bispectral index （BIS） and the Observer's Assessment of Alertness/Sedation Scale （OAA/S）. We evaluated the effect of dexmedetomidine （Dex） on the autonomic respiratory function and the sedative depth of the patients in a comprehensive and systematic way,so as to provide reference for the clinical safety of Dex. Methods In the study,we randomly divided 80 patients into four groups,Dex 0.5,group g/kg （group D₁）,1 group g/kg （group D₂）,1.5 g/kg group （D₃ group） and control group （D₀ group）. There were 20 cases in each group. At about 35min before anesthesia induction,Dex or 0.9% saline 10 mL was injected intravenously. The following time points were selected： pre- administration （T0）,pre-treated 5min （T1）,pre-treated 10min （T2）,pre-processed 15min （T3）,pre-processed 20min （T4）,pre -treated 25min （T5） and pre-treated 30min. The following experimental parameters were recorded at the above time point： tidal volume （VT）,minute ventilation （MV）,end expiratory carbon dioxide partial pressure （P_ETCO₂）,respiratory frequency （RR）,first second exhalation rate （FEV1%）,compliance ring （PV ring）,resistance ring （FV ring）,pulse oxygen saturation （SpO₂）,heart rate （HR）,and respiratory mechanics parameters and circulatory parameters such as mean arterial pressure （MAP）,bispectral index （BIS） and vigilance / sedation score （OAA/S）. At the same time at T0,T1,T3 and T6,arterial blood gas was extracted,and PaO₂,PaCO₂ and pH values were recorded. Results Compared with the control group,the value of VT,RR,MV,PETCO₂,FEV1%,PaCO₂ and SpO₂ in group D₁ did not change significantly （P>0.05）,and the morphology of PV ring and FV ring were basically normal. In group D₂ and group D₃,MV decreased by 16.9% and 27% respectively;PaCO₂ increased by 11% and 19.9% respectively;FEV1% decreased by 11% and 14.9% respectively. No apnea occurred in the four groups,and all patients had SpO₂ at 98% or above. The area of PV rings and FV rings of spontaneous breathing in group D₃ was reduced （P<0.05）. The BIS values in group D₁ were above 85,OAA/S 4 was 65%,sedative satisfaction rate was low,20% patients had a score of 3 in OAA/S;group D₂ had the highest sedative satisfaction rate,70% of patients had a score of 3 in OAA/S,and no excessive sedation;60% of patients in group D₃ with an OAA/S score that was less than or equal to 2. Conclusion The sedation effect that was caused by intravenous infusion of Dex and its effect on respiratory mechanics are as follows： with the increase of Dex's dose,the degree of sedation is deepened. Although SpO₂ is still in the normal range,the respiration will be restrained （the area of PV ring and FV ring is narrowed,the value of PaCO₂ is increased）,and the clinical recommendation of intravenous infusion Dex is at a dose of 0.5µg /kg~1µg /kg for safety reasons. .

目的 探讨不同剂量右美托咪定(Dex)对腰硬联合麻醉下经皮肾镜碎石术患者的镇静效应和安全性。方法 腰硬联合麻醉下行俯卧位经皮肾镜碎石术患者80例,随机分成4组。D1组、D2组、D3组俯卧位后静脉泵注负荷剂量DEX 0.5 μg/kg,输注的时间为10min,随后分别静脉泵注DEX 0.3 μg/(kg·h)、0.5 μg/(kg·h)、 0.7 μg/(kg·h)至术毕;C组俯卧位后静脉泵注生理盐水10 mL/h至术毕。记录T0～T6共7个时点的HR、MAP、p(O₂)和BIS值;在T0、T3～T6等时点对患者静息Ramesay镇静评分;观察患者不良反应发生情况;询问综合满意度。结果 D2组和D3组的HR、MAP、BIS、Ramesay镇静评分在T3~T6等时点明显慢于C组(P＜0.05);D3组心动过缓和头晕等不良反应的发生率明显高于D1组、D2组和C组(P＜0.05),D2组和D3组术中躁动的发生率明显低于D1组和C组(P＜0.05),D1组、D2组和D3组高血压、寒战和恶心呕吐的发生率明显低于C组(P＜0.05),且综合满意度明显高于C组。结论 DEX本药物用于该类手术的镇静疗效及安全性均优于对比的药物。建议临床使用剂量为DEX负荷剂量0.5 μg/kg,随后以0.5 μg/(kg·h)维持。

目的 研究不同剂量重组人干扰素α1b雾化吸入治疗毛细支气管炎的疗效及安全性。方法 选取2016年1月—2016年9月期间我院儿科收治的年龄≤2 a的毛细支气管炎患儿86例,均符合毛细支气管炎诊断标准,随机分为观察一组(29例)、观察二组(29例)和对照组(28例)。所有患儿均给予综合常规治疗,观察一组患儿雾化吸入生理盐水+质量浓度为0.2 g/L的沙丁胺醇+1 μg/(kg·次)重组人干扰素α1b,观察二组患儿雾化吸入生理盐水+质量浓度为0.2 g/L的沙丁胺醇+2 μg/(kg·次)重组人干扰素α1b。比较三组患儿治疗有效率、临床症状改善和不良反应发生情况。结果 观察一组与观察二组在治愈率和总有效率两个方面均显著高于对照组(P<0.05),但观察一组与观察二组治愈率和总有效率比较差异不显著(P>0.05);观察一组和观察二组患儿临床症状和体征持续时间明显少于对照组(P<0.05),但观察一组和观察二组患儿临床症状和体征持续时间无显著差异(P>0.05);三组患儿不良反应发生率差异不显著(P>0.05)。结论 低剂量与高剂量雾化吸入重组干扰素α1b对于小儿毛细支气管炎临床疗效接近,且均无严重不良反应,综合经济效益和社会效益考虑,在临床上推广低剂量雾化吸入重组干扰素α1b治疗小儿毛细支气管炎更具价值。

Objective To study the effects of different doses of recombinant human interferon α1b inhalation efficacy and safety in the treatment of bronchiolitis. Methods 86 cases of children, who were less than 2 years old were selected in department of pediatrics from January 2016 to September 2016. They were randomly divided into for observation group Ⅰ (29 cases), observation group Ⅱ(29 cases) and control group (28 cases). All the patients were treated with conventional therapy. Group Ⅰ with atomization inhalation of salbutamol and 0.02% with saline+1 μg /kg times of recombinant human interferon α1b were observed and the same as in the two groups Ⅱ with atomization inhalation of salbutamol and 0.02% with saline+2 μg /kg recombinant human interferon α1b. The treatment efficiency, the improvement of clinical symptoms and adverse reactions were compared. Results The cure rate and total effective rate of observation group Ⅰand Ⅱ were significantly higher than those in the control group (P<0.05), there were no significant differences in the cure rate and total effective rate between observation group Ⅰand Ⅱ(P>0.05). The clinical symptoms and signs of the patients of observation group Ⅰand Ⅱ were significantly higher than those in the control group (P<0.05), there were no significant differences in the clinical symptoms and signs of the patients between observation group Ⅰand Ⅱ(P>0.05). There was no significant difference in the incidence of adverse reactions between the three groups (P>0.05). Conclusion There were no serious adverse reactions in low dose and high dose of atomization inhalation of recombinant interferon α1b for close to the clinical curative effect of children with bronchiolitis. Considering comprehensively economic benefits and social benefits, it is worth of promotion low dose of atomization inhalation of recombinant interferon 1b in the treatment of children with bronchiolitis.

目的 观察分析急性左心衰竭患者应用不同剂量硝酸甘油对血浆中氨基末端B型脑钠肽(NT-proBNP)的影响。方法 选取我院120例急性左心衰竭患者作为研究对象,采用随机数字表法进行分组,其中对照组给予小剂量硝酸甘油,观察组患者采取大剂量硝酸甘油,观察并比较两组患者用药后NT-proBNP的变化情况及临床疗效。结果 经不同剂量药物治疗后,观察组总有效率(96.67%)明显高于对照组(68.33%),差异有统计学意义( χ²=16.681,P＜0.05);用药前,两组患者NT-proBNP水平相近,差异无统计学意义(t=0.384,P＞0.05);用药后6 h、12 h及24 h,观察组患者NT-proBNP指标水平有明显降低,较对照组改善明显,差异有统计学意义(t=17.470、13.988、13.900,P＜0.05)。结论 在常规治疗基础上,应用硝酸甘油微泵注入,采用大剂量硝酸甘油给药治疗急性左心衰竭,可在短时间内降低患者NT-proBNP指标水平,缓解患者症状,临床效果显著。

Objective To observe and analyze the influence and significance of different doses of nitroglycerin on plasma amino-terminal pro-B-type natriuretic peptide (NT-proBNP) in patients with acute left ventricular failure. Methods One hundred and twenty patients with acute left heart failure were randomly assigned into control group and observation group. Patients in the control group were treated with low dose of nitroglycerin, while patients in the observation group were given high dose of nitroglycerin. NT-proBNP and clinical efficacy in the two groups were observed and compared after treatment. Results After different doses of drug treatment, the overall response rate in the observation group (96.67%) was significantly higher than that in the control group (68.33%), with statistically significant difference (χ²=16.68, P<0.05). Before treatment, NT-proBNP levels were similar, without statistically significant difference (t=0.384, P>0.05). At 6, 12 and 24 hours after treatment, NT-proBNP level was obviously decreased, which was improved than the control group, there were statistically significant differences (t=17.470, 13.988, 13.900, P<0.05). Conclusion Conventional treatment combined high-dose nitroglycerin micro-injection may reduce NT-proBNP indicator levels, relieve symptoms, and have significant clinical effect in patients with acute left heart failure.

目的 观察手术前静滴不同剂量复方麝香注射液对老年患者全麻术后早期轻度认知障碍(MCI)发生的影响。方法 选择下肢与下腹部手术全麻患者120例(ASA Ⅰ-Ⅱ级),将其随机分为4组,组Ⅰ(n=30,对照),采用质量浓度为9 g/L的生理盐水100 mL静脉滴注;组II(n=30):应用低剂量复方麝香注射液(0.1 mL/kg,加入质量浓度为9 g/L的生理盐水100 mL)手术开始前0.5 h静脉滴注,其速率为200 mL/h;组Ⅲ(n=30): 应用中剂量复方麝香注射液(0.2 mL/kg), 药物配伍、治疗时间和注射速度与组Ⅱ相同;组Ⅳ(n=30):高剂量复方麝香注射液(0.3 mL/kg),用药方法同组Ⅱ。各组术前用药、麻醉诱导、术中麻醉深度、麻醉苏醒等用药与方法相同;观察各组患者术前、术后第1天、3天、7天的CCSE、FAQ、MMSE评分等。结果 4组患者手术时间、麻醉时间、术中出血量、苏醒时间基本相同(P>0.05),4组手术后第1天、3天及7天CCSE、FAQ、MMSE认知功能评分均减少, 组Ⅱ、组Ⅲ、组Ⅳ下降的变化幅度较小,得分高于组Ⅰ(P<0.05),组Ⅱ、组Ⅲ、组Ⅳ组间比较差异无统计学意义(P﹥0.05);术后第1天、3天、7天MCI发生率,组Ⅰ分别为66.7%、33.3%和16.7%;组Ⅱ为50.0%、16.7%和6.7%;组Ⅲ为50.0%、16.7%和6.7%。组Ⅳ为46.7%、20.0%和10.0%,用药组比组Ⅰ降低(P<0.05),但组Ⅱ、组Ⅲ、组Ⅳ之间无明显差异(P﹥0.05);4组术后不良反应组间比较差异无统计学意义。结论 术前静脉滴注复方麝香注射液0.1 mL/kg可有效降低老年患者全麻术后MCI的发生,增加麝香注射液剂量(0.2 mL/kg、0.3 mL/kg)对于老年手术患者MCI未见增效作用,临床选用静滴的剂量0.1 mL/kg即可。

Objective To observe the effect of different doses of compound musk injection before operation on early mild cognitive impairment (MCI) in elderly patients after general anesthesia. Methods We selected 120 cases of lower limb and lower abdominal surgery general anesthesia (ASA level Ⅰ-Ⅱ),and divided them randomly into 4 groups: Group Ⅰ (n=30,control): 0.9% saline 100mL intravenous infusion; Group Ⅱ (n=30): low dose compound musk injection (0.1 mL/kg,add 0.9% saline 100 mL), 0.5h before the start of surgery, intravenous drip, the rate was 200 mL/h; Group Ⅲ (n=30): medium dose compound musk injection (0.2 mL/kg), the same as group Ⅱ in drug compatibility,treatment time and injection rate; Group Ⅳ (n=30): high dose compound musk injection (0.3 mL/kg), the same as group Ⅱ in drug compatibility, treatment time and injection rate. Each premedication, induction of anesthesia, anesthesia depth,intraoperative awake and anesthesia medication were the same. And we observed each group about preoperative and postoperative CCSE,FAQ and MMSE(mini-mental state examination) score of the 1st days,3rd days and 7th days. Results In the 4 groups of patients,the operation time,anesthesia time,intraoperative blood loss,recovery time were basically the same (P>0.05); CCSE,FAQ,MMSE cognitive function scores of 4 groups were reduced after operation on the first day,the third day and the seventh day; group Ⅱ,group Ⅲ,group Ⅳ decreased slightly.The scores were higher than group Ⅰ (P<0.05),and there were no significant differences between group Ⅱ,group Ⅲ and group Ⅳ (P>0.05); The incidence of MCI in first days, third day and seventh day after operation respectively was: group Ⅰ 66.7%,33.3% and 16.7%; group Ⅱ 50%,16.7% and 6.7%; group Ⅲ 50%,16.7% and 6.7%; group Ⅳ 46.7%,20% and 10%.Those of the drug groups were lower than group Ⅰ (P<0.05), but there was no significant difference between group Ⅱ, group Ⅲ and group Ⅳ (P>0.05).There were no significant differences in the 4 groups in postoperative adverse reactions. Conclusion Preoperative intravenous infusion of compound musk injection 0.1 ml/kg, may effectively reduce the incidence of MCI in elderly patients after general anesthesia. Increasing musk injection dose (0.2 ml/kg,0.3 ml/kg and 0.4 mg/kg) was no synergistic effect on MCI in elderly patients,0.1ml/kg is enough.