Masimo Radical Signal Extraction Manual do Operador descarregar pdf (Página 9)

1-4 Radical-7 Signal Extraction Pulse CO-Oximeter Operator’s Manual Radical-7 Signal Extraction Pulse CO-Oximeter Operator’s Manual 1-51-5

overview

PRINCIPLE OF OPERATION

Pulse CO-Oximetry is governed by the following principles:

1. Oxyhemoglobin (oxygenated blood), deoxyhemoglobin (non-oxygenated blood)

carboxyhemoglobin (blood with carbon monoxide content) and methemoglobin spe-

cies differ in their absorption of visible and infrared light (using spectrophotometry,

see ﬁ gure below).

2. The amount of arterial blood in tissue changes with your pulse (photoplethysogra-

phy). Therefore, the amount of light absorbed by the varying quantities of arterial

blood changes as well.

The Radical-7 Pulse CO-Oximeter uses a multi-wavelength sensor to distinguish

between oxygenated blood, deoxygenated blood, blood with carbon monoxide content

and blood with oxidized hemoglobin. The Radical-7 utilizes a sensor with various light-

emitting diodes (LEDs) that pass light through the site to a photodiode (photodetector).

See ﬁ gure below. Signal data is obtained by passing various visible and infrared lights

(LED’s, 500 to 1000nm) through a capillary bed (for example, a ﬁ ngertip, a hand, a foot)

and measuring changes in light absorption during the blood pulsatile cycle. This infor-

mation may be useful to clinicians. The maximum radiant power of the strongest light is

rated at 22mW. The photodetector receives the light, converts it into an electronic signal

and sends it to the Radical-7 for calculation.

Once the Radical-7 receives the signal from the sensor, it utilizes Masimo Rainbow SET

signal extraction technology to calculate the patient’s functional oxygen saturation, blood

levels of carboxyhemoglobin (SpCO), methemoglobin (SpMet) and pulse rate. The SpCO

and SpMet measurements rely on a multiwavelength calibration equation to quantify the

percentage of carbon monoxide and methemoglobin in arterial blood. The maximum of

the skin surface temperature is measured at an ambient temperature of less than 106º F

(41º C). This is veriﬁ ed by Masimo sensor skin temperature test p

rocedures

1. Light Emitting Diodes (LEDs)

(7 + wavelengths)

2. Recessed Photo Detector

600

650 700 750 800 850 900 950 1000

Wavelength (nm)

Absorption (mm-1)

Absorption Spectra

Carboxyhemoglobin

Oxyhemoglobin

Methemoglobin

Deoxyhemoglobin

overview

1-4

Pulse CO-Oximetry

SpO

GENERAL DESCRIPTION

Pulse CO-Oximetry is a continuous and non-invasive method of measuring the level of

arterial oxygen saturation in blood. The measurement is taken by placing a sensor on a

patient, usually on the ﬁ ngertip for adults and the hand or foot for neonates. The sensor is

connected to the Pulse CO-Oximetry instrument with a patient cable. The sensor collects

signal data from the patient and sends it to the instrument. The instrument displays the

calculated data in three ways:

1. As a percent value for arterial oxygen saturation (SpO

)

2. As a pulse rate (BPM)

As a plethysmographic waveform

The following ﬁ gure shows the general monitoring setup.

SpCO GENERAL DESCRIPTION

Pulse CO-Oximetry is a continuous and non-invasive method of measuring the levels

of carbon monoxide concentration (SpCO) in arterial blood. It relies on the same basic

principles of pulse oximetry (spectrophotometry) to make its SpCO measurement. The

measurement is obtained by placing a sensor on a patient, usually on the ﬁ ngertip for

adults and the hand or foot for infants. The sensor connects either directly to the Pulse

CO-Oximetry instrument or through an instrument patient cable. The sensor collects sig-

nal data from the patient and sends it to the instrument. The instrument displays the

calculated data as percentage value for the SpCO, which reﬂ ect blood levels of carbon

monoxide bound to hemoglobin.

SpMet GENERAL DESCRIPTION

Pulse CO-Oximetry is a continuous and non-invasive method of measuring the levels

of methemoglobin concentration (SpMet) in arterial blood. It relies on the same basic

principles of pulse oximetry (spectrophotometry) to make its SpMet measurement. The

measurement is obtained by placing a sensor on a patient, usually on the ﬁ ngertip for

adults and the hand or foot for infants. The sensor connects either directly to the Pulse

CO-Oximetry instrument or through an instrument patient cable. The sensor collects sig-

nal data from the patient and sends it to the instrument. The instrument displays the

calculated data as percentage value for the SpMet.

FastSat APOD

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1. Instrument

2. Patient Cable

3. Sensor

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