CHEST:雾化吸入伊洛前列素可改善ARDS患者的气体交换

2013-03-07 sd3212 DXY

据推测雾化吸入伊洛前列素能改善肺动脉高血压和急性呼吸窘迫综合征(ARDS)患者的肺通气/灌注匹配程度;吸入伊洛前列素不会对肺的机械力学或全身血流动力学造成不良影响,而且其治疗效果可以通过患者的PaO2/FiO2比值及其动脉血氧分压的改善而得到体现。为了验证这一猜想,来自美国俄克拉荷马州俄克拉何马大学健康科学中心肺病和危重医学科的Eva Sawheny博士及其同事进行了一项研究,研究结果在线发表于2

据推测雾化吸入伊洛前列素能改善肺动脉高血压和急性呼吸窘迫综合征(ARDS)患者的肺通气/灌注匹配程度;吸入伊洛前列素不会对肺的机械力学或全身血流动力学造成不良影响,而且其治疗效果可以通过患者的PaO2/FiO2比值及其动脉血氧分压的改善而得到体现。为了验证这一猜想,来自美国俄克拉荷马州俄克拉何马大学健康科学中心肺病和危重医学科的Eva Sawheny博士及其同事进行了一项研究,研究结果在线发表于2013年1月31日的《CHEST》杂志上。研究显示:雾化吸入伊洛前列素可改善ARDS患者的气体交换,且不会对其肺部机械力学或全身血流动力学造成不良影响。
该研究的主要研究对象是一些患有肺动脉高压的ARDS患者。这些研究对象先后被给予了10微克、和20微克2个剂量的伊洛前列素雾化吸入治疗,其中,第二剂的用药时间为首次用药后30分钟。在恒定的呼吸机设置条件下,研究人员测量了患者基线时的血流动力学、气道压力、以及气体交换指标,并将这些指标与患者在以下时间点的相关测定值进行了比较。这些时间点分别为:吸入首剂伊洛前列素后30分钟、吸入第二剂伊洛前列素后30分钟、及吸入第二剂后2小时。研究的主要结果变量是动脉血氧分压,次要结果变量是PaO2/FiO2比值、平均动脉压、和肺顺应性、以及患者的氧气和二氧化碳通气当量。
该研究的主要结果为:在获得了知情同意后,研究共入选了20例ARDS患者,其中,男性9例,女性11例,患者平均年龄为59岁(44~66岁)。患者在基线时、吸入第一剂、和第二剂伊洛前列素后的血氧分压值分别为:82(±13)毫米汞柱、100(±25)毫米汞柱、和100(±25)毫米汞柱。而其PaO2/FiO2比值则分别为177(±60)、213(±67)、和212(±70)(均P<0.01)。此外,患者的动脉血二氧化碳分压、气道峰值压力和平台压力、以及其血压和心率等,在吸入伊洛前列素后均无显著改变。
该研究结果显示:雾化吸入伊洛前列素可改善ARDS患者的气体交换,且不会对其肺部机械力学或全身血流动力学造成不良影响。这提示吸入伊洛前列素是改善此类患者氧合作用的一个有效疗法。

AIMS AND OBJECTIVES:  We hypothesized that nebulized iloprost would improve ventilation perfusion matching in patients with pulmonary hypertension and acute respiratory distress syndrome (ARDS) as reflected by an improved PaO2/FIO2 ratio and PaO2 without adversely affecting lung mechanics or systemic hemodynamics.
METHODS:  ARDS patients with pulmonary hypertension were enrolled. With constant ventilator settings, hemodynamics, airway pressures and gas exchange measured at baseline were compared to values 30 min after 10 mcg nebulized Iloprost, and again 30 min after a second dose of 20 mcg of iloprost and finally 2 h after the second dose. The primary outcome variable was PaO2 while secondary outcomes were PaO2/FIO2 ratio, mean arterial BP, and lung compliance ventilatory equivalents for O2 and CO2.
RESULTS:  After informed consent was obtained 20 patients (9 male and 11 female, median age 59 ((IQR 44 to 66)) years, with ARDS were enrolled. Baseline PaO2 improved from 82(±13) mmHg to 100(±25) and 100(±25) mmHg after the 1st and 2nd doses of iloprost respectively, while, PaO2/FIO2 ratio of 177(±60) improved to 213(±67) and 212(±70) (all p<0.01). PaCO2, peak and plateau airway pressures, systemic blood pressure and heart rate were not significantly changed after iloprost.
CONCLUSIONS:  The improvement in gas exchange without any detrimental effects on pulmonary mechanics or systemic hemodynamics suggests nebulized iloprost may be a useful therapeutic agent to improve oxygenation in patients with ARDS.

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    2013-10-19 drwjr
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    2013-07-01 Smile2680
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