Systolic Search - GE Dash 2500 Operator's Manual

NIBP: Principles of SuperSTAT Noninvasive Blood Pressure Determination

Systolic Search

2042480-001 C
cuff pressure falls below 8 mmHg. The parameter then deflates the cuff (to zero
detected pressure), analyzes the stored data, and updates the screen.
The operating cycle is composed of four parts: inflation time, deflation time,
evaluation time, and wait time. Wait time, which varies from mode to mode, is
affected by the cycle time (auto mode) or operator intervention (manual mode).
The figure shows the basic operating cycle for an NIBP determination.
If systolic pressure is not found, the NIBP parameter can search at cuff pressures
higher than the initial target pressure. The parameter will inflate the cuff above
the initial target pressure to get better data in the systolic region. The maximum
pressure allowed in systolic search is limited by the normal range for cuff
pressures.
In any operating mode, if a patient's systolic pressure exceeds the inflation
pressure, the parameter will begin normal deflation sequence, detect the
absence of a systolic value, stop deflation, reinflate to a higher (than initial)
inflation pressure (290 mmHg maximum in adult mode; 145mmHg in neonatal
mode), and resume the normal deflation sequence.
If it has been 16 minutes or less since the last determination and the current
blood pressure is similar to the previous reading, the monitor will try to make an
accelerated determination of blood pressure. During irregular rhythms, only
pulses from the current determination are used in calculating the blood pressure
values. In order to ensure adequate artifact rejection capability and optimal
SuperSTAT NIBP performance, several criteria used to match and qualify the
oscillometric pulses at each pressure step are relaxed while supplementing the
criteria with additional information from ECG.
Dash 2500 Patient Monitor
NIBP - Auto Mode
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