Clinical Evaluation of the Effects of Signal Integrity and Saturation on Data Availability and Accuracy of Masimo SET?? and Nellcor N-395 Oximeters in Children

Abstract

We compared new pulse oximeters from Nellcor and Masimo and found that, with good signal conditions, both new devices performed similarly to older technology. Overall, Masimo reported less data as questionable than Nellcor. With poor signal conditions or during hypoxemia, the new devices are not clinically equivalent to each other or to the older technology.

Can we reduce episodes of haemoglobin desaturation in full‐term babies restrained in car seats?

“…Figure 3 strongly suggests that airway obstruction occurred during this episode, with paradoxical movements of the chest and abdominal tracing coincident with the sudden fall in SpO2. The accuracy of pulse oximeters is poor at low SpO2's (26); nevertheless, this infant was considered by two experienced physicians to be deeply cyanosed during the episode.…”

Variability in time delay between two models of pulse oximeters for deriving the photoplethysmographic signals

“…In particular, the newer generation of oximeters like those incorporated with the signal extraction technology (SET R ) from the Masimo Corporation (Irvine, California, USA) shows promising results (Salyer 2003, Trivedi et al 1997. However, conflicting reports on their performance do exist (Robertson andHoffman 2004, Bohnhorst et al 2000). Although an accurate SaO 2 measure from modern oximeters may be achieved, the characteristics of its other serial output signals like the photoplethysmography (PPG) have yet to be examined.…”

Clinical practices in neonatal oxygenation: where have we failed? What can we do?

“…The advantages of SpO 2 monitors with signal extraction technology (Masimo SET) during situations of low perfusion and motion have been previously described. [7][8][9][10][11] SpO 2 monitoring is based on the relation between hemoglobin (Hb) and oxygen. Bohr showed that the dissociation curve was sigmoid shaped, with an initial relative horizontal portion, followed by a vertical one, ending again with a horizontal shape.…”

“…Since some monitors are better than others, a similar or even larger disparity in SpO 2 simultaneous readings between different SpO 2 monitors exists. [7][8][9][10][11]16 When SpO 2 is 97% in one monitor, the true SaO 2 and the SpO 2 in another monitor could be 100%. Therefore, accepting the imprecision of the real world, the one SpO 2 value cannot be the sole focus.…”