Validity and reliability of a novel slow cuff-deflation system for noninvasive blood pressure monitoring in patients with continuous-flow left ventricular assist device

Gregg M. Lanier, Khristine Orlanes, Yacki Hayashi, Jennifer Murphy, Margaret Flannery, Rosie Te-Frey, Nir Uriel, Melana Yuzefpolskaya, Donna M. Mancini, Yoshifumi Naka, Hiroo Takayama, Ulrich P. Jorde, Ryan T. Demmer, Paolo C. Colombo

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

Background-Doppler ultrasound is the clinical gold standard for noninvasive blood pressure (BP) measurement among continuous-flow left ventricular assist device patients. The relationship of Doppler BP to systolic BP (SBP) and mean arterial pressure (MAP) is uncertain and Doppler measurements require a clinic visit. We studied the relationship between Doppler BP and both arterial-line (A-line) SBP and MAP. Validity and reliability of the Terumo Elemano BP Monitor, a novel slow cuff-deflation device that could potentially be used by patients at home, were assessed. Methods and Results-Doppler and Terumo BP measurements were made in triplicate among 60 axial continuousflow left ventricular assist device (HeartMate II) patients (30 inpatients and 30 outpatients) at 2 separate exams (360 possible measurements). A-line measures were also obtained among inpatients. Mean absolute differences (MADs) and correlations were used to determine within-device reliability (comparison of second and third BP measures) and betweendevice validity. Bland-Altman plots assessed BP agreement between A-line, Doppler BP, and Terumo Elemano. Success rates for Doppler and Terumo Elemano were 100% and 91%. Terumo Elemano MAD for repeat SBP and MAP were 4.6±0.6 and 4.2±0.6 mm Hg; repeat Doppler BP MAD was 2.9±0.2 mm Hg. Mean Doppler BP was lower than A-line SBP by 4.1 (MAD=6.4±1.4) mm Hg and higher than MAP by 9.5 (MAD=11.0±1.2) mm Hg; Terumo Elemano underestimated A-line SBP by 0.3 (MAD=5.6±0.9) mm Hg and MAP by 1.7 (MAD=6.0±1.0) mm Hg. Conclusions-Doppler BP more closely approximates SBP than MAP. Terumo Elemano was successful, reliable, and valid when compared with A-line and Doppler.

Original languageEnglish (US)
Pages (from-to)1005-1012
Number of pages8
JournalCirculation: Heart Failure
Volume6
Issue number5
DOIs
StatePublished - Sep 1 2013

Keywords

  • Blood pressure measurement/monitoring
  • Heart failure
  • Heart-assist devices
  • Terumo Elemano

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