The Science Journal of the American Association for Respiratory Care

1999 OPEN FORUM Abstracts

ANALYSIS OF PULSE OXIMETERS FOR DETECTION OF SPO2 AND PULSE RATE VARIATION DURING MOTION ARTIFACT.

G.B. Russell, MD, H. G. Schuler, CCRC, J.M. Graybeal, CRT*, Penn State University Dept of Anesthesia, Hershey Pa, and * Masimo Corp, Irvine Ca.

BACKGROUND: Pulse oximeters (PO) have frequent SpO2 and pulse rate (PR) false alarms due to artifact conditions. New generation PO incorporate various technologies to minimize false alarms. Simulators, such as the Biotek Index 2p, have been developed which produce standardized PO artifact signals. We tested the hypothesis: POs will accurately report SpO2 and PR during simulated motion artifact.

Methods: Using this simulator, set for no-motion (n) and 2 different motion artifacts (low frequency (lf) and high frequency (hf)), 11 POs were tested from SpO2 70-98% and PR 45-180 bpm. POs tested included Nellcor Puritan Bennett N200 and NPB 295, Datex Ohmeda 3700, 3900, and AS/3, Hewlett-Packard model 66, Criticare Poni, Novametrix Oxypleth, Nonin 8600, BCI 3304 and Masimo SET. Results are presented as the bias +/- precision and number of failures to report.

Results: Agreement varied considerably between PO models. For SpO2 the 3700 and AS/3 had bias >5% at n. All POs, except the Masimo SET, had bias >9% at lf and hf. For PR, at n, all POs were accurate within 1+/- 1 bpm. All POs, except the AS/3 and Masimo SET, had bias > 50 bpm (PR > 50 bpm higher than set simulator PR) at both lf and hf. 6 POs, including the N200, N295, AS/3, Poni, Oxypleth, BCI 3304 and Nonin 8600 had multiple SpO2 and PR failures during lf and hf.

Conclusions: The Masimo SET was the only pulse oximeter able to accurately report both SpO2 and PR during motion artifact.

Table

SpO2 bias and precision (Prec) for all oximeters tested at no motion (n) and both low frequency (lf) and high frequency (hf) motion artifacts.

No Motion Motion lf Motion hf
OXIMETER Bias Prec Fails Bias Prec Fails Bias Prec Fails
N200 -1 1 0 -24 5 0 -28 6 1
N295 -1 1 0 -18 6 1 -22 4 2
3700 -6 3 0 -29 4 0 -31 5 0
3900 0 1 0 -17 5 0 -17 4 0
AS-3 -8 5 0 -23 6 0 -18 6 1
HP-66 -1 1 0 -27 7 0 - - 10
PONI -3 1 0 -25 3 0 -12 14 1
Oxypleth -1 1 0 -9 9 2 - - 10
BCI 3304 -1 1 0 -21 4 0 - - 10
Nonin 8600 0 2 0 -15 7 0 - - 10
Masimo SET 0 1 0 1 1 0 0 1 0

OF-99-171

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