|
Nellcor 404/506 (N-395/N-595)
Nellcor uses less sophisticated adaptive filter, not effective
under
many conditions, including persistent motion
conditions.
|
|
Philips/HP Rev. B.0 and C.0
Philips uses only a single frequency domain algorithm that is
vulnerable
to random and jerky motions and other patient
conditions.
|
Masimo SET uses Adaptive Filter, DST, FST and SST, in
parallel processing
mode (all patented by Masimo). Masimo SET's four unique
algorithms, along
with conventional red over infrared algorithm allows for
unprecedented fidelity,
sensitivity and specificity. Patient data is
presented to the set of algorithms.
Each algorithm's unique strengths are
leveraged to ensure accurate readings
through all patient conditions.
Masimo SET’s most powerful algorithm is DST. All
algorithms depend upon
assumptions. The more assumptions, the weaker the
algorithm. DST makes
only one assumption – that arterial blood has a higher
oxygenation than venous
– making it the most powerful pulse oximetry
algorithm.
|
Clinical Study (NICU)
Independent Clinical studies show Masimo SET is the
leading SpO2 technology. It outperforms other conventional pulse oximeters on
patients with motion or movement, patients with low perfusion and under
difficult conditions.
| |
Masimo SET
|
Philips/HP Viridia 24 C.0
|
Nellcor N-395
|
Novametrix MARS
|
| "False" Hypoxemia |
1
|
10
|
42
|
33
|
"False" Bradycardia
|
1
|
2
|
1
|
61
|
Frozen pulse rate (PR)
|
0
|
11
|
6
|
46
|
| Missed desaturations |
1
|
6
|
4
|
12
|
| Data drop-outs |
1
|
21
|
10
|
93
|
William W. Hay, Jr. MD, et al, Reliability of Conventional and
New Pulse Oximetry in Neonatal Patients, Neonatal Clinical Research Center,
Department of Pediatrics, University of Colorado Health Sciences Center, Denver,
Colorado (December 2001)
Motion and Low Perfusion Study
|
Oximeter
|
% of detecting
true alarms
(SpO2 Sensitivity)
|
% of not false alarming
(SpO2 Specificity)
|
SpO2 Performance
index
|
Drop Out
|
| Masimo SET |
99%
|
97%
|
93%
|
0.0%
|
| Philips/HP CMS B.0 |
70% |
83% |
80% |
3.7% |
Nellcor N-395
|
70%
|
73%
|
73%
|
4.0%
|
Novametrix MARS
|
40%
|
42%
|
58%
|
2.4%
|
Steve J. Barker, PhD, MD, Chairman of Department of Anesthesia,
University of Arizona
|
