title: Pulse Oximeter Derived Blood Pressure Measurement in Patients With a Continuous Flow Left Ventricular Assist Device.
abstract: 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.
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Yaron
authors: Y
authors: Hellman
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Adnan S
authors: AS
authors: Malik
authors: Department of Biostatistics, IU School of Medicine, Indianapolis IN, USA.
authors: Kathleen A
authors: KA
authors: Lane
authors: Department of Biostatistics, IU School of Medicine, Indianapolis IN, USA.
authors: Changyu
authors: C
authors: Shen
authors: IU Health Cardiovascular Surgeons, Indianapolis, IN, USA.
authors: I-Wen
authors: IW
authors: Wang
authors: IU Health Cardiovascular Surgeons, Indianapolis, IN, USA.
authors: Thomas C
authors: TC
authors: Wozniak
authors: IU Health Cardiovascular Surgeons, Indianapolis, IN, USA.
authors: Zubair A
authors: ZA
authors: Hashmi
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Sarah D
authors: SD
authors: Munson
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Jeanette
authors: J
authors: Pickrell
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Marco A
authors: MA
authors: Caccamo
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Irmina
authors: I
authors: Gradus-Pizlo
authors: IU School of Medicine, Krannert Institute of Cardiology, Indianapolis IN, USA.
authors: Azam
authors: A
authors: Hadi
mesh_terms: D000328:Adult; D062186:Arterial Pressure; D001795:Blood Pressure Determination / Q000379:methods*; D005260:Female; D006353:Heart-Assist Devices; D006801:Humans; D008297:Male; D008875:Middle Aged; D010092:Oximetry / Q000379:methods*; D011446:Prospective Studies; D018608:Ultrasonography, Doppler / Q000379:methods
keywords: -Left ventricular assist device; -Pulse oximeter; Blood pressure