目的:呼吸机相关膈肌功能障碍在临床应用呼吸机患者中普遍存在,与ICU患者的脱机拔管及病死率密切相关,本研究通过对全麻术后转入ICU继续应用呼吸机患者应用体外膈肌起搏器刺激膈神经来间断锻炼膈肌功能,通过超声、呼吸肌力学指标来评估对膈肌功能的影响。方法:研究对象为全麻术后转入ICU继续呼吸机治疗的患者,试验组间断应用体外膈肌起搏器,对照组不予膈神经刺激,在0 h、5 h、10 h、15 h、20 h分别在PSV模式下测量膈肌增厚率、最大吸气负压来评估膈肌功能。结果:t0时对照组和试验组的膈肌增厚率:(15.47 ± 0.67)%、(15.48 ± 0.44)%和最大吸气负压:(−4.29 ± 0.61) cm H2O、(−4.30 ± 0.52) cm H2O,t检验,差异无统计学意义;在5 h、10 h、15 h、20 h时试验组TFdi依次为:(17.59 ± 0.50)%、(22.98 ± 0.83)%、(24.95 ± 0.63)%、(28.28 ± 0.58)%;对照组为:(17.36 ± 0.64)%、(22.55 ± 0.92)%、(24.69 ± 0.94)%、(28.04 ± 0.61)%;两组间进行独立样本t检验,差异有明显的统计学意义(P < 0.05)。结论:在完全性控制通气数小时后膈肌收缩功能即明显下降。完全性控制通气术后患者早期进行体外膈肌起搏治疗能改善呼吸机相关膈肌功能障碍的进展。 Ventilator-related diaphragmatic dysfunction is common in patients with clinical use of ventilators, and is closely related to the weaning and extubation of ICU patients and the mortality rate. This study used external diaphragm for patients who were transferred to ICU after general anesthesia and continued to use ventilators. The pacemaker stimulates the phrenic nerve to exercise the diaphragm function intermittently, and evaluates the impact on the diaphragm function through ultrasound and respiratory muscle mechanics. Method(s): The subjects of the study were patients who were transferred to ICU after general anesthesia to continue ventilator treatment. The test group was intermittently applied with external diaphragm pacemaker, and the control group was not given phrenic nerve stimulation. They were in PSV mode at 0 h, 5 h, 10 h, 15 h, and 20 h, respectively to measure the thickening rate of the diaphragm and the maximum negative inspiratory pressure to evaluate the function of the diaphragm. Result(s): Diaphragm thickening rate of control group and test group at t0 was: (15.47 ± 0.67)%, (15.48 ± 0.44)%, and maximum negative inspiratory pressure was: (−4.29 ± 0.61) cm H2O, (−4.30 ± 0.52) cm H2O, for independent samples t test between the two groups, the difference was not statistically significant; at 5 h, 10 h, 15 h, and 20 h, the TFdi of the test group was: (17.59 ± 0.50)%, (22.98 ± 0.83)%, (24.95 ± 0.63)%, (28.28 ± 0.58)%. The control group was: (17.36 ± 0.64)%, (22.55 ± 0.92)%, (24.69 ± 0.94)%, (28.04 ± 0.61)%; independent sample t test was performed between the two groups, and the difference was statistically significant (P < 0.05). Conclusion(s): After several hours of fully controlled ventilation, the contraction function of the diaphragm decreased significantly. Early external diaphragm pacing therapy in patients after complete controlled ventilation can improve the progression of ventilator-related diaphragm dysfunction.
目的:呼吸机相关膈肌功能障碍在临床应用呼吸机患者中普遍存在,与ICU患者的脱机拔管及病死率密切相关,本研究通过对全麻术后转入ICU继续应用呼吸机患者应用体外膈肌起搏器刺激膈神经来间断锻炼膈肌功能,通过超声、呼吸肌力学指标来评估对膈肌功能的影响。方法:研究对象为全麻术后转入ICU继续呼吸机治疗的患者,试验组间断应用体外膈肌起搏器,对照组不予膈神经刺激,在0 h、5 h、10 h、15 h、20 h分别在PSV模式下测量膈肌增厚率、最大吸气负压来评估膈肌功能。结果:t0时对照组和试验组的膈肌增厚率:(15.47 ± 0.67)%、(15.48 ± 0.44)%和最大吸气负压:(−4.29 ± 0.61) cm H2O、(−4.30 ± 0.52) cm H2O,t检验,差异无统计学意义;在5 h、10 h、15 h、20 h时试验组TFdi依次为:(17.59 ± 0.50)%、(22.98 ± 0.83)%、(24.95 ± 0.63)%、(28.28 ± 0.58)%;对照组为:(17.36 ± 0.64)%、(22.55 ± 0.92)%、(24.69 ± 0.94)%、(28.04 ± 0.61)%;两组间进行独立样本t检验,差异有明显的统计学意义(P < 0.05)。结论:在完全性控制通气数小时后膈肌收缩功能即明显下降。完全性控制通气术后患者早期进行体外膈肌起搏治疗能改善呼吸机相关膈肌功能障碍的进展。
呼吸机相关膈肌功能障碍,膈神经刺激,膈肌增厚率,机械通气
Xiaohong Wang1*, Liang Shan1, Xiangmei Xu2, Chaofan Zhang1, Xin Liu1, Liandi Li1
1Department of Critical Care, The Affiliated Hospital of Qingdao University, Qingdao Shandong
2Department of Hepatology Center, The Affiliated Hospital of Qingdao University, Qingdao Shandong
Received: Mar. 22nd, 2021; accepted: Apr. 20th, 2021; published: Apr. 27th, 2021
Ventilator-related diaphragmatic dysfunction is common in patients with clinical use of ventilators, and is closely related to the weaning and extubation of ICU patients and the mortality rate. This study used external diaphragm for patients who were transferred to ICU after general anesthesia and continued to use ventilators. The pacemaker stimulates the phrenic nerve to exercise the diaphragm function intermittently, and evaluates the impact on the diaphragm function through ultrasound and respiratory muscle mechanics. Method(s): The subjects of the study were patients who were transferred to ICU after general anesthesia to continue ventilator treatment. The test group was intermittently applied with external diaphragm pacemaker, and the control group was not given phrenic nerve stimulation. They were in PSV mode at 0 h, 5 h, 10 h, 15 h, and 20 h, respectively to measure the thickening rate of the diaphragm and the maximum negative inspiratory pressure to evaluate the function of the diaphragm. Result(s): Diaphragm thickening rate of control group and test group at t0 was: (15.47 ± 0.67)%, (15.48 ± 0.44)%, and maximum negative inspiratory pressure was: (−4.29 ± 0.61) cm H2O, (−4.30 ± 0.52) cm H2O, for independent samples t test between the two groups, the difference was not statistically significant; at 5 h, 10 h, 15 h, and 20 h, the TFdi of the test group was: (17.59 ± 0.50)%, (22.98 ± 0.83)%, (24.95 ± 0.63)%, (28.28 ± 0.58)%. The control group was: (17.36 ± 0.64)%, (22.55 ± 0.92)%, (24.69 ± 0.94)%, (28.04 ± 0.61)%; independent sample t test was performed between the two groups, and the difference was statistically significant (P < 0.05). Conclusion(s): After several hours of fully controlled ventilation, the contraction function of the diaphragm decreased significantly. Early external diaphragm pacing therapy in patients after complete controlled ventilation can improve the progression of ventilator-related diaphragm dysfunction.
Keywords:Ventilator-Related Diaphragm Dysfunction, Phrenic Nerve Stimulation, Diaphragm Thickening Rate, Mechanical Ventilation
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膈肌功能障碍是一种尚未被广泛意识到的导致呼吸衰竭以及机械通气时间延长的原因,影响膈肌功能的因素很多,近年来,很多动物实验、临床研究表明,机械通气可作为一种独立因素对膈肌收缩功能产生影响,尤其是在完全控制通气下,膈肌受损、肌肉萎缩、功能障碍进展迅速。因此对机械通气患者早期干预至关重要。临床上目前只能尽早将完全控制通气降为控制/辅助机械通气并早期脱机拔管来减轻呼吸机相关膈肌功能障碍(Ventilator-induced diaphragmatic dysfunction, VIDD)发展。本研究就临床术后转入ICU继续机械通气患者通过体外膈肌起搏器间断刺激膈神经通过超声、呼吸肌力学等手段来评估对VIDD的影响。
试验对象为在医院住院,所有患者术中均给与全麻+神经肌肉阻滞剂、有创气管插管 + 完全控制机械通气,术后转入ICU;本研究方案获得青岛大学附属医院伦理委员会同意批准,所有研究对象均签署知情同意书。体外膈肌起搏器(广州雪利昂生物科技有限公司,HLO-GJ13A);床旁超声机(日立,日本,HITACHI ALOKA NOBLUS)。
本试验采用前瞻性随机对照临床研究,纳入标准:1) 手术时间为4~8小时;2) 年龄大于18岁小于80岁;3) 中枢呼吸驱动功能正常;4) 胸锁乳突肌区域皮肤完整暴露。排除标准:1) 存在膈神经刺激禁忌症;2) 怀疑有单侧膈肌麻痹、萎缩,既往患有神经肌肉相关疾病或已知的膈肌解剖学异常;3) 既往存在心肺疾病、怀孕、腹水。该试验取得病人家属的知情同意。
采用随机数字表法分为试验组和对照组,常规镇静镇痛,RASS评分控制在−2到−3分,机械通气模式为V/C模式,试验组在0 h、4 h、8 h、12 h、16 h、20 h通过体外膈肌起搏器刺激双侧膈神经15分钟,对照组不予膈神经刺激。
1) 患者一般情况及可能影响膈肌功能的因素:年龄、性别、体重指数(体重、身高)、SPECH II评分、完全控制通气时间、心率(HR)、呼吸(RR)、平均动脉压(MAP)、体温(T)、氧合指数(PO2/FiO2)、血气分析(PH、PaO2、PaCO2、SpO2)、白蛋白、血红蛋白等。2) 在0 h、5 h、10 h、15 h、20 h分别PSV (参数设定为PEEP在0 cm H2O左右,PS的设定以保证VT在6~8 ml/kg为准)模式下测定TFdi、MIP,TFdi操作流程:两名经过专门超声操作规范化培训的重症医学科医师分别测量,在半卧位45˚PS模式下,PEEP在0 cm H2O左右,VT在6~8 ml/kg,至少3次自然呼吸,选择7~13 MHZ线阵传感器,在B超及M超模式下探测膈肌增厚比率(DIF = (吸气末厚度 − 呼气末厚度)/呼气末厚度 × 100%),膈肌点的位置采用超声定位法确定 [
SPSS 19.0软件,采用Kolmogorov-Smirnov test对计量资料进行正态性评估。呈正态性计量资料的分析以平均值 ± 标准偏差(SD)表示,两组间的差异性采用独立样本t检验,组内的差异性比较采用配对t检验;非呈正态性计量资料的分析以中位数(四分位间距(IQR)表示,两组间的差异性采用Mann-Whitney U检验,组内的差异性比较采用配对t检验。计数资料以率或例数表示,对计数资料的分析采用χ2检验。TFdi与浅快呼吸指数的相关性采用Pearson相关性分析。P < 0.05表示差异有统计学意义。
t0时(15.47 ± 0.67)%、(15.48 ± 0.44)%和最大吸气负压:(−4.29 ± 0.61) cm H2O、(−4.30 ± 0.52) cm H2O,两组间进行独立样本t检验,差异无统计学意义。而在膈神经刺激后试验组各个阶段所测得的TFdi依次为:(17.59 ± 0.50)%、(22.98 ± 0.83)%、(24.95 ± 0.63)%、(28.28 ± 0.58)%;对照组各个阶段所测得的TFdi依次为:(17.36 ± 0.64)%、(22.55 ± 0.92)%、(24.69 ± 0.94)%、(28.04 ± 0.61)%;两组间进行独立样本t检验,试验组在膈神经刺激后的各个阶段所测得的膈肌增厚率均高于对照组,差异有明显的统计学意义。在膈神经刺激后试验组各个阶段所测得的MIP依次为:(−6.54 ± 0.32) cm H2O、(−7.11 ± 0.41) cm H2O、(−14.47 ± 0.47) cm H2O、(−26.01 ± 0.44) cm H2O;对照组:(−6.38 ± 0.62) cm H2O、(−6.89 ± 0.71) cm H2O、(−14.20 ± 0.84) cm H2O、(−25.50 ± 1.43) cm H2O;两组间进行独立样本t检验,试验组在膈神经刺激后的各个阶段所测得的最大吸气负压均高于对照组,差异有明显的统计学意义(P < 0.05) (详见表1)。
组别 | DIF | MIP |
---|---|---|
对照组 | 28.04 ± 0.61 | −25.50 ± 1.43 |
试验组 | 28.28 ± 0.58 | −26.01 ± 0.44 |
P | 0.017 | 0.005 |
表1. t20时试验组和对照组DIF、MIP值比较
备注:资料以均数 ± 标准差(x ± s)表示,统计分析方法采用独立样本t检验。
脱机过程中测得的浅快呼吸指数与脱机前测得的膈肌增厚率两者之间的Pearson相关性系数为1,详见表2和表3,说明两者具有明显的相关性。
均值 | 标准差 | N | |
---|---|---|---|
膈肌增厚率 | 32.8217 | 2.03785 | 141 |
浅快呼吸指数 | 41.2766 | 12.37169 | 141 |
表2. 描述性统计量
膈肌增厚率 | 浅快呼吸指数 | ||
---|---|---|---|
膈肌增厚率 | Pearson相关性 | 1 | −0.434 |
显著性(双侧) | 0.000 | ||
N | 141 | 141 | |
浅快呼吸指数 | Pearson相关性 | −0.434 | 1 |
显著性(双侧) | 0.000 | ||
N | 141 | 141 |
表3. 相关性
**.在.01水平(双侧)上显著相关。
膈肌是最主要的呼吸肌,正常人在平静呼吸时,膈肌收缩承载着70%的潮气量,正常生理学上一次自主呼吸为膈肌主动收缩、膈肌朝向腹部下移进而产生胸腔内负压使得肺泡张开完成一次吸气过程,而呼吸机控制通气模式下,为呼吸机向肺泡产生一个正压通气使得肺泡张开进而膈肌被动下移。呼吸机相关膈肌功能障碍(Ventilator-induced diaphragmatic dysfunction, VIDD)最早由Vassilakopoulos和Petrof提出 [
膈肌功能障碍在危重病人中发病率很高,危重患者不能转出ICU的众多因素中脱机困难占据了很大的比例,尤其是脊髓损伤导致长期依赖呼吸机的患者体现明显,“小潮气量肺保护性通气”很早之前就被提出并广泛应用于临床ARDS患者,而膈肌保护性通气策略近年来逐渐映入大家眼帘 [
通过膈肌增厚率和浅快呼吸指数的相关性研究,本文可以发现两者之间存在明显的相关性,这为在评估进行自主呼吸试验、脱机拔管指征提供了一个操作简单无创、可重复性高的指标,有相关研究表明,在膈肌增厚率大于30%~36%对指导脱机有较好的评估作用,本研究亦发现,脱机成功的患者其膈肌增厚率在(32.82 ± 2.04)%,这为以后临床进行脱机患者前的评估又增加了一条有较好可信度的评估指标。
综上所述:在完全性控制通气数小时后膈肌收缩功能即明显下降。完全性控制通气术后患者早期进行体外膈肌起搏治疗能改善呼吸机相关膈肌功能障碍的进展。同时超声测定膈肌增厚率对机械通气患者的自主呼吸试验、脱机拔管具有良好的指导作用。
王晓红,单 亮,徐祥美,张超凡,刘 鑫,李连弟. 体外膈肌起搏对呼吸机相关膈肌功能障碍的有效性研究Effectiveness of External Diaphragm Pacing on Ventilator-Related Diaphragm Dysfunction[J]. 临床医学进展, 2021, 11(04): 1259-1264. https://doi.org/10.12677/ACM.2021.114272
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