Справочник Пользователя для Innokas Yhtyma Oy VC150

9-10

VC150 Vital Signs Monitor

KO00065K

: SpO

2

 on the screen

Perfusion index measurement

The perfusion index (PI) measurement is a clinical tool that provides a dynamic 
numeric reflection of perfusion at the sensor site. PI is a relative value that varies 
from patient to patient. The perfusion index value appears in its own field under 
the label PI. The user can use the PI value to compare the strength of the pulse 
signal at different sites on a patient in order to locate the best site for the sensor, 
i.e., the site with the strongest pulse signal.

Signal Strength values are mathematically calculated perfusion values 
represented by asterisks. The SpO

2

 signal strength should be adequate. This is 

indicated by the display of two or three asterisks or the absence of a Low Signal 
Quality message. The more asterisks there are the better the signal quality. The 
better the arterial blood flow is, the better signal quality is obtained. A strong 
pulse signal increases the validity of SpO

2

 and pulse rate data.

SpO

2

 alarm limit adjustments can be set either A) by entering upper and lower 

limit values directly in a limit box on the home screen as instructed in 

on page 3-12 or B) by adjusting limit values in the Alarm Setup 

screen as instructed in 

Pleth

The Plethysmographic waveform (Pleth) represents a real-time waveform for the 
relative SpO

2

 pulsatile amplitude. The Pleth waveform is always automatically 

scaled to fit the window for the best display quality. The waveform uses the 
same color as the SpO

2

 field.