2042480-001 C Dash 2500 Patient Monitor 8-3
Heart Rate/Pulse: Description
Description
Heart rate/pulse (HR/Pulse) in the Dash 2500 Patient Monitor can be derived
from one of several sources. In descending order of priority, they are ECG, pulse
oximetry (SpO
2
), and noninvasive blood pressure (NIBP). Instead of choosing a
single source of HR/Pulse, you can activate the auto feature to choose the best
available source.
A label designating the source of the HR/Pulse data appears in the HR field of the
screen. The color of this value changes based on the current source (optional).
Beats are indicated in the HR field by a blinking heart symbol that is
synchronized with an optional audible QRS (pulse) tone.
When ECG is the source, HR/Pulse values are calculated over the previous 8
beats. The HR field is labeled with ECG.
When SpO
2
is the source, HR/Pulse values are derived from the pulse oximetry
signal, and the HR field is labeled SpO
2
. When SpO
2
is the source for HR/Pulse,
pulse rate (derived from SpO
2
) appears only in the HR field (dashes appear for PR
in the SpO
2
field when the View SpO2 PR? option is set to yes). In addition, if the
QRS volume is on, the pitch of the pulse tone increases with oxygen saturation
value.
The HR/Pulse parameter has audible and visible alarms to let you know when
the HR/Pulse is outside the high or low limit. When the source of HR/Pulse
indicates a zero rate (e.g., detection of ECG ASYSTOLE, SpO2 LOST PULSE), the
HR/Pulse value is forced to zero, resulting in a low limit alarm.
NIBP cannot be chosen as a source for HR/Pulse, it only becomes the current
source of HR/Pulse when no other rate source parameters are available. When
NIBP is the current source, another rate source parameter takes over as the
source when it becomes available.
Indications and Contraindications
The Dash 2500 Patient Monitor is indicated for monitoring heart rate/pulse. This
device is not designed, sold, or intended for use except as indicated.
General Notes
Because the various sources measure or derive HR/Pulse differently from
each other, changing from one source to another may change the value in
the HR field.
Because it is not a continuously monitored parameter, NIBP cannot be
chosen as a source for HR/Pulse. NIBP will become the source only if no
other source is available.
A patient’s vital signs may vary dramatically during the use of
cardiovascular agents such as those that raise or lower blood pressure or
those that increase or decrease heart rate.
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