Masimo Radical Signal Extraction Návod k obsluze stáhnout pdf (Strana 9)

1-4 Radical-7 Color Display Signal Extraction Pulse Oximeter Operator’s Manual Radical-7 Color Display Signal Extraction Pulse 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) car-

boxyhemoglobin (blood with carbon monoxide content) and methemaglobin (blood

with oxidized hemoglobin) species 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. 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 information may be useful to clinicians. The maximum radiant power

of the strongest light is rated at 22mW. See ﬁ gure below. The Radical-7 utilizes a sensor

with various light-emitting diodes (LEDs) that pass light through the site to a photodiode

(photodetector). 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 satura-

tion, fractional concentration of carboxyhemoglobin, methemoglobin and pulse rate.

The SpCO and SpMet measurements rely on a multiwavelength calibration equation to

estimate the percentage of carbon monoxide and oxidized hemoglobin 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

procedures

1. Light Emitting Diodes (LEDs)

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 (PR)

3. 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 principles

of pulse oximetry to make its SpCO measurement. The measurement is taken by placing

a sensor on a patient, usually on the ﬁ ngertip for adults and the hand or foot for infants.

The sensor connects directly to the Pulse CO-Oximetry instrument or with a patient ca-

ble. The sensor collects signal data from the patient and sends it to the instrument. The

instrument displays the calculated data as percentage value for the SpCO. The Radical-7

can be conﬁ gured to be a combined SpO

monitor with other available parameters.

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 principles of

pulse oximetry to make its SpMet measurement. The measurement is taken by placing a

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

sensor connects directly to the Pulse CO-Oximetry instrument or with a patient cable.

The sensor collects signal data from the patient and sends it to the instrument. The in-

strument displays the calculated data as percentage value for the SpMet. The Radical-7

can be conﬁ gured to be a combined SpO

monitor with other available parameters.

asim

10/11/06 12:23:11am

1. Instrument

2. Patient Cable

3. Sensor

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