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Pulse Oximeter Derived Blood Pressure Measurement in Patients With a Continuous Flow Left Ventricular Assist Device
Author(s) -
Hellman Yaron,
Malik Adnan S.,
Lane Kathleen A.,
Shen Changyu,
Wang IWen,
Wozniak Thomas C.,
Hashmi Zubair A.,
Munson Sarah D.,
Pickrell Jeanette,
Caccamo Marco A.,
GradusPizlo Irmina,
Hadi Azam
Publication year - 2017
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/aor.12790
Subject(s) - medicine , cuff , blood pressure , photoplethysmogram , pulsatile flow , pulse (music) , doppler effect , blood flow , pulse pressure , cardiology , mean arterial pressure , radial artery , brachial artery , hemodynamics , artery , surgery , heart rate , physics , filter (signal processing) , astronomy , detector , computer science , electrical engineering , computer vision , engineering
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.