Masimo Rad-8 User Manual

1-6 Rad-8 Signal Extraction Pulse Oximeter Operator’s Manual
1
overview
1
SIGNAL EXTRACTION TECHNOLOGY (SET) FOR SpO
2
MEASUREMENTS
Masimo Signal Extraction Technology’s signal processing differs from conventional pulse
oximeters. Conventional pulse oximeters assume that arterial blood is the only blood moving
(pulsating) in the measurement site. During patient motion, however, the
venous blood also
moves, causing conventional pulse oximeters to read low values, because they cannot distinguish
between the arterial and venous blood movement (sometimes referred to as noise). Masimo SET
pulse oximetry utilizes parallel engines and adaptive digital fi ltering. Adaptive fi lters are powerful
because they are able to adapt to the varying physiologic signals and/or noise and separate them
by looking at the whole signal and breaking it down to its fundamental components. The Masimo
SET signal processing algorithm, Discrete Saturation Transform
®
(DST
®
) reliably identifi es the
noise, isolates it and, using adaptive fi lters, cancels it. It then reports the true arterial oxygen
saturation for display on the monitor.
FASTSAT
FastSat enables rapid tracking of arterial oxygen saturation changes. Arterial oxygen
saturation data is averaged using pulse oximeter averaging algorithms to smooth the trend.
When the Rad-8 is set to FastSat “On”, the averaging algorithm evaluates all the saturation
values providing an averaged saturation value that is a better representation of the patient’s
current oxygenation status. With FastSat, the averaging time is dependent on the input
signal.
MASIMO SET PARALLEL ENGINES
Intermediate Calculations
Confidence
Intermediate Calculations
Confidence
Intermediate Calculations
Confidence
Intermediate Calculations
Confidence
Intermediate Calculations
Confidence
Intermediate Calculations
Confidence
Pre-Processing &
Data Reduction
Digitized, Filtered &
Normalized
LED
Wavelengths
R/IR
(Conventional
Pulse Oximetry)
DST
Adaptive
Filter
SST ™
®
FST:
Proprietary
Algorithm 3
FST:
Proprietary
Algorithm 4
Pulse
Rate
Algorithm
Confidence
Based
Arbitrator
Post
Processor
%SpO
2
PI
PR

Masimo Rad-8 Specifications

General

Display	LED
Pulse Rate Range	25-240 bpm
Pulse Rate Accuracy	±3 bpm
Trend Time	72 hours
SpO2 Range	0-100%
SpO2 Accuracy	± 2 digits (70-100% SpO2)
Power Supply	AC adapter or rechargeable battery
Perfusion Index (PI) Range	0.02% - 20%
PVI Range	0-100
Operating Temperature	5°C to 40°C (41°F to 104°F)
Storage Temperature	-4°F to 140°F (-20°C to 60°C)
Relative Humidity	10-95% non-condensing
Altitude	Up to 15, 000 ft (4, 572 m)