Masimo Pronto Pulse CO-Oximeter, Руководство оператора

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Pronto Chapter 1: Technology Overview
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rainbow Pulse CO-Oximetry Technology
rainbow Pulse CO-Oximetry technology is governed by the following principles:
1. Oxyhemoglobin (oxygenated blood), deoxyhemoglobin (non-oxygenated blood),
carboxyhemoglobin (blood with carbon monoxide content), methemoglobin
(blood with oxidized hemoglobin) and blood plasma constituents differ in their
absorption of visible and infrared light (using spectrophotometry).
2. The amount of arterial blood in tissue changes with pulse
(photoplethysmography). Therefore, the amount of light absorbed by the varying
quantities of arterial blood changes as well.
Pronto uses a multi-wavelength sensor to distinguish between oxygenated blood,
deoxygenated blood, blood with carbon monoxide, oxidized blood, and blood plasma.
Pronto utilizes a sensor with various light-emitting diodes (LEDs) that pass light through the
site to a diode (detector). Signal data is obtained by passing various visible and infrared
lights (LEDs, 500 to 1400nm) through a capillary bed (for example, a fingertip, 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 ≤ 25
mW. The detector receives the light, converts it into an electronic signal, and sends it to
Pronto for calculation.
1. Light Emitting Diodes (LEDs)
(7 + wavelengths)
2. Detector
Once the Pronto receives the signal from the sensor, it utilizes proprietary algorithms to
calculate the patient’s functional oxygen saturation (SpO2 [%]), total hemoglobin
concentration (SpHb [g/dL]), and pulse rate (PR). The SpHb measurement relies on a
multi-wavelength calibration equation to quantify the percentage of carbon monoxide and
methemoglobin and the concentration of total hemoglobin in arterial blood. Maximum
skin-sensor interface temperature was tested to be less than 41º C (106º F) in a minimum
ambient temperature of 35º C (95º F). The tests were conducted with sensors operating at
reasonable worst case power.