神经电活动辅助通气对急性呼吸窘迫综合征患者人机同步性的影响  被引量:8

Effects of neurally adjusted ventilatory assist on patient-ventilator synchrony in patients with acute respiratory distress syndrome

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作  者:吴晓燕[1] 黄英姿[1] 杨毅[1] 刘松桥[1] 刘火根[1] 邱海波[1] 

机构地区:[1]东南大学附属中大医院ICU东南大学急诊与危重病医学研究所,南京210009

出  处:《中华结核和呼吸杂志》2009年第7期508-512,共5页Chinese Journal of Tuberculosis and Respiratory Diseases

基  金:基金项目:江苏省自然科学基金资助项目(BK2008298);江苏省医学领军人才基金资助项目(2006);江苏省135重点人才基金资助项目(2007);江苏省科技发展计划基金资助项目(BS2007045)

摘  要:目的观察神经电活动辅助通气(NAVA)对急性呼吸窘迫综合征(ARDS)患者人机同步性的影响。方法以2008年1月至6月入住东南大学附属中大医院ICU18例ARDS机械通气患者为研究对象,按随机数字表法选择NAVA或压力支持通气(PSV)模式进行通气,通气支持水平分4步递增。PSV压力支持水平从5(31/1H2O(1cmH2O=0.098kPa)开始,每5min增加5cmH2O,分别为5、10、15、20cmH2O。NAVA支持水平每5min增加0.2—1.00cmH2O/μV,使NAVA中通气支持水平分别与PSV4个压力支持水平相当,观察不同支持条件下(PSV1~PSV4及NAVA1—NAVA4)人机同步性、呼吸肌负荷、血流动力学以及呼吸力学等指标。结果(1)吸气触发:①触发延迟时间:随着支持水平增加,PSV中触发延迟时间明显延长(P〈0.05),而应用NAVA通气时触发延迟时间无明显延长。与相同支持水平的PSV比较,应用NAVA的触发延迟时间均明显缩短(P〈0.05)。②无效触发:随着PSV支持水平增加,无效触发明显增加,PSV1时无效触发2.3%,PSV4时无效触发为22%(P〈0.05)。应用NAVA时,不同支持水平下,均未见无效触发。(2)吸/呼气转换:随着支持水平增加,PSV中吸/呼气转换延迟时间明显延长(P〈0.05),而应用NAVA通气时吸/呼气转换延迟时间无明显延长。与相同支持水平的PSV比较,应用NAVA时l骖}/呼气转换延迟时间均明显缩短(P〈0.05)。(3)通气支持幅度(潮气量):PSVl和NAVA1的潮气量分别为(361±121)ml和(361±69)ml,差异无统计学意义。但NAVA3和NAVA4时的潮气量分别为(417±71)m1和(427±80)ml,明显低于PsV3和PSV4时的潮气量[分别为(604±141)ml和(675±108)ml,均P〈0.05]。(4)呼吸肌负荷:随着支持水平增加,应用NAVA和PSV通气的膈肌电活动幅度、食管压力时间乘积均逐渐降低(P〈0.05)。在相同支持Objective To observe the effect of neurally adjusted ventilatory assist (NAVA on patient-ventilator synchrony in patients with acute respiratory distress syndrome (ARDS). Methods Eighteen patients with ARDS were enrolled in the study. Each patient underwent both an incremental pressure support ventilation (PSV) and NAVA run randomly in 4 steps. The PSV level was gradually increased 5 cm H20( 1 cm H20 =0. 098 kPa) every 5 min from 5 cm H20 until to 20 cm H20. Incremental NAVA was individually set in steps of 0. 2 - 1.0 cm H2O/μV every 5 min to determine the NAVA level predicted to give an airway pressure in each step equivalent to that of PSV. Parameters in patient-ventilator synchrony such as ventilation trigger, ventilation switching and ventilation maintenance were observed at the same time during PSV ( PSVI - PSV4 ) and NAVA ( NAVAl - NAVA4 ). Results ( I ) Ventilation trigger: (1) trigger delay : with progressive increases in PSV, the trigger delays increased significantly ( P 〈 0.05 ). With increasing NAVA, the trigger delay did not increase significantly ( P 〉 0. 05 ) and each of them was shorter than that of PSV in each corresponding step ( P 〈 0. 05 ). (2)Ineffective trigger: At PSV1, the ineffective triggers accounted for 2. 3% of the neural respiratory rate(NRR), but the ineffective triggers added up to 22% in PSV4 significantly (P 〈 0. 05 ). All neural efforts were triggered and there were not ineffective triggers at all level in NAVA. (2) Off cycle delay: the off cycle delays in PSV2 - PSV4 increased significantly when compared with PSV1 (P 〈 0. 05 ). With increasing NAVA, the off cycle delays did not increase significantly ( P 〉 0. 05 ) and each of them was shorter than that of PSV in each corresponding step (P 〈 0. 05). (3) Magnitude of assist [ tidal volume (VT) ] : The VTE (361 ± 69) mlJ in NAVAl was equivalent to the VT [ ( 361± 121 ) ml ] in PSV1 ( P 〉 0. 05 ). The VT [ ( 417

关 键 词:呼吸窘迫综合征 成人 呼吸 人工 膈肌电活动 人机同步性 

分 类 号:R686[医药卫生—骨科学]

 

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