Huntleigh Sonicaid FM800 Series, Инструкция по эксплуатации, Страница: 99 / 130

Sonicaid FM800 Encore Series Instructions for Use
99
13.3
105B
The Dawes/Redman criteria
 An episode of high variation, above the first centile for gestational age.
 No decelerations > 20 lost beats (> 100 lost beats on records longer than 30 minutes).
 Basal heart rate between 116 and 160 bpm, though a slightly lower or higher rate
may be acceptable after 30 minutes, if all other parameters are normal. An asterisk
on the analysis results shows that the fetal heart rate is low or high, but that in the
context of the rest of the record, it is acceptable.
 At least one fetal movement or three accelerations.
 No evidence of a sinusoidal fetal heart rate rhythm.
 Short-term variation should be 3 ms or greater.
 Either an acceleration
Or variability in high episodes > the tenth centile and fetal movements > 20.
 No errors or decelerations at the end of the record.
13.4
106B
Sonicaid CARE analysis
Analysis is performed at 10 minutes, and every 2 minutes thereafter up to a maximum of 60
minutes. The analysis fits a baseline to the fetal heart rate data collected so far, and from
this measures accelerations and decelerations. Short-term variation is calculated, and
episodes of high and low variation looked for.
The system then compares the calculated results with the Dawes/Redman criteria. If the
record appears normal, the message CRITERIA MET appears, and FM800E gives a
single beep. Otherwise, CRITERIA NOT MET is shown.
The analysis can be stopped once the criteria have been met. FM800E produces a report
of the analysis results at the end of the trace. Abnormalities are highlighted. If the analysis
is not stopped, it is possible for the results to change to CRITERIA NOT MET. As more
data is received, a subsequent analysis may re-fit the baseline so that, for example, an
episode of high variation is no longer above the first centile.
If monitoring is stopped before 10 minutes, the first analysis is not performed. After 60
minutes, the analysis stops, even if monitoring is continued. The results printed will be
those from the final analysis at 60 minutes.