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Non-invasive blood pressure
The first determination initially pumps up to a target cuff pressure of 160 mmHg for
adult, 140 mmHg for child, or 110 mmHg for infant. The initial target pressure preset
can be adjusted to a lower (or higher) initial target pressure.l
PDM modules’ NIBP technology
PDM modules use the DINAMAP SuperSTAT technology. This technology measures
the mean arterial pressure and then determines the systolic and diastolic values.
However, this technology also incorporates the EK-Pro algorithm.
(Adult/child only) When ECG is monitored, SuperSTAT NIBP is able to determine blood
pressure in the presence of irregular heart rhythms. At the beginning of a SuperSTAT
NIBP determination, the coefficient of variation from the previous 120 ECG RR intervals
is used to determine if an irregular rhythm is present.
The first determination initially pumps up to a default target cuff pressure of about
135 mmHg for adults, 125 mmHg for child, or 100 mmHg for infant. The initial target
pressure preset can be adjusted if you desire a lower (or higher) initial target pressure.
To allow for rapid setting of cuff pressure, the monitor will momentarily inflate to a
higher pressure, then immediately deflate to the target pressure.
As a determination is taken, the pattern of the patient's oscillation size is stored as a
function of pressure. In any subsequent determination, as few as four pressure steps
may be necessary to complete the process. When employing fewer pressure steps, the
system uses the stored information from the previous blood pressure determination to
decide the best pressure steps to take. The consistency of pulse sizes are measured to
tell if the oscillations taken at a step are good and if more steps are needed.
If the current blood pressure reading is similar to the previous reading, some
information from the previous blood pressure may be used in the current
determination. The data is constantly evaluated during a measurement to try to
perform a blood pressure determination in the shortest possible time, providing
greater comfort to the patient.
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.
PSM modules’ NIBP technology
PSM use a technology similar to DINAMAP Classic, with the exception of cuff deflation.
In this algorithm the cuff pressure is deflated continuously (linear bleed), as opposed
to step deflation.
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