Validation of noninvasive hemoglobin measurements using the Masimo Radical-7 SpHb Station

Abstract Background Hemoglobin levels must be obtained through blood draws, which are invasive, time-consuming, and provide only 1 data point at a time rather than continuous measurements. The Masimo Radical-7 SpHb Station (Masimo Corporation, Irvine, CA) has been shown by its manufacturers to provi...

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Bibliographic Details
Published in:The American journal of surgery 2011-05, Vol.201 (5), p.592-598
Main Authors: Causey, Marlin Wayne, M.D, Miller, Seth, M.D, Foster, Andrew, M.D, Beekley, Alec, M.D, Zenger, David, M.D, Martin, Matthew, M.D
Format: Article
Language:English
Subjects:
Adhesives
Adolescent
Adult
Aged
Aged, 80 and over
Biological and medical sciences
Blood
Catheters
Confidence intervals
Equipment Design
Female
Follow-Up Studies
General aspects
Hemoglobin
Hemoglobins - analysis
Hemorrhage
Hemorrhage - blood
Hemorrhage - diagnosis
Humans
Intensive Care Units
Laboratories
Male
Masimo Radical-7
Medical sciences
Middle Aged
Monitoring
Monitoring, Physiologic - instrumentation
New technology
Noninvasive monitor
Oximetry - instrumentation
Patients
Prospective Studies
Reproducibility of Results
Sensors
Spectrum analysis
Statistical analysis
Surgery
Time measurement
Universal Serial Bus
Vascular surgery
Veins & arteries
Young Adult
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Summary:Abstract Background Hemoglobin levels must be obtained through blood draws, which are invasive, time-consuming, and provide only 1 data point at a time rather than continuous measurements. The Masimo Radical-7 SpHb Station (Masimo Corporation, Irvine, CA) has been shown by its manufacturers to provide accurate noninvasive hemoglobin measurements in physiologically normal patients. The objective of this study was to validate noninvasive hemoglobin measurements using the Masimo Radical-7 device. Methods Data were prospectively collected in 2 cohorts of patients: major operations requiring hemodynamic monitoring (operating room [OR]) and critically ill patients (intensive care unit [ICU]). Noninvasive hemoglobin measurements (SpHb) were recorded and were then compared with laboratory hemoglobin measurements. Results Data were collected on 60 patients (OR = 25 and ICU = 45). The overall correlation of the Masimo SpHb and the laboratory Hb was .77 ( P < .001) in the OR group with a mean difference of .29 g/dL (95% confidence interval [CI], .08–.49). The overall correlation in the ICU group was .67 ( P < .001) with a mean difference of .05 g/dL (95% CI, −.22 to −.31). Conclusions Noninvasive hemoglobin monitoring is a new technology that correlated with laboratory values and supports the continued study of noninvasive hemoglobin monitoring.
ISSN:0002-9610
1879-1883
DOI:10.1016/j.amjsurg.2011.01.020