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Pulse Oximeter Derived Blood Pressure Measurement in Patients With a Continuous Flow Left Ventricular Assist Device

机译：脉冲血氧仪衍生连续流动左心室辅助装置的患者血压测量

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Currently, blood pressure (BP) measurement is obtained noninvasively in patients with continuous flow left ventricular assist device (LVAD) by placing a Doppler probe over the brachial or radial artery with inflation and deflation of a manual BP cuff. We hypothesized that replacing the Doppler probe with a finger-based pulse oximeter can yield BP measurements similar to the Doppler derived mean arterial pressure (MAP). We conducted a prospective study consisting of patients with contemporary continuous flow LVADs. In a small pilot phase I inpatient study, we compared direct arterial line measurements with an automated blood pressure (ABP) cuff, Doppler and pulse oximeter derived MAP. Our main phase II study included LVAD outpatients with a comparison between Doppler, ABP, and pulse oximeter derived MAP. A total of five phase I and 36 phase II patients were recruited during February-June 2014. In phase I, the average MAP measured by pulse oximeter was closer to arterial line MAP rather than Doppler (P = 0.06) or ABP (P < 0.01). In phase II, pulse oximeter MAP (96.6 mm Hg) was significantly closer to Doppler MAP (96.5 mm Hg) when compared to ABP (82.1 mm Hg) (P = 0.0001). Pulse oximeter derived blood pressure measurement may be as reliable as Doppler in patients with continuous flow LVADs.
机译：目前，通过将多普勒探针放置在肱骨或桡动脉上与手动BP袖口的通胀和放气，在连续流动左心室辅助装置（LVAD）患者中血压（BP）测量。我们假设用基于手指的脉搏血氧计替换多普勒探针可以产生类似于多普勒衍生平均动脉压（MAP）的BP测量。我们进行了一项前瞻性研究，由现代连续流动LVAD组成。在一项小型飞行期I住院性研究中，我们将直流动脉线测量与自动血压（ABP）袖带，多普勒和脉冲血氧计衍生图进行了比较。我们的主要II期研究包括多普勒，ABP和脉搏血氧仪衍生图之间的LVAD门诊患者。在2014年2月 - 6月期间共招募了五阶段I和36阶段II患者。在I阶段I中，脉冲血氧计测量的平均地图更接近动脉线图而不是多普勒（P = 0.06）或ABP（P <0.01 ）。与ABP（82.1mm Hg）相比脉冲血氧仪衍生的血压测量可以是连续流动LVAD患者中的多普勒的可靠性。

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