Huntleigh SonicaidTeam, Руководство оператора, Страница: 51 / 113

Sonicaid Team Operator’s Manual
51
In a study of 14 near-term normal fetuses with the threshold set at 40%, the sensi-
tivity and specificity of the Actogram function (compared with scanner-identified
breathing, limb movement and trunk movement) were 96% and 68% respectively.
This data is published with the kind permission of Professor David James of the
Department of Obstetrics and Gynaecology, Queens Medical Centre, Nottingham.
Actogram setup menu
1 Press [MENU] twice.
2 Select [ACTOGRAM].
3 To increase or decrease the sensitivity of Actogram’s detection of fetal movement,
use the [SENSITIVITY] button.
< < < U L T R A S O U N D A C T I V I T Y M A R K S A R E O F F
< < < U L T R A S O U N D A C T I V I T Y G R A P H I S O F F
<<<SET AC T O G R AM T H R ESH O L D 4 0
<<<SEN SIT I VIT Y EX IT >>>
Changing the Actogram display setting
From the Actogram setup menu:
1 Press [ACTOGRAM ACTIVITY MARKS] to turn event mark printing on and off.
2 Press [ULTRASOUND ACTIVITY GRAPH] to turn graph printing on and off.
Changing the Actogram threshold
From the Actogram setup menu:
1 Press [SET ACTOGRAM THRESHOLD].
2 Enter a new value.
The required threshold may depend on whether the trace is showing a high incid-
ence of artefact. It is recommended to set the threshold between 40 and 60%.
3 Observe the Actogram trace for a short period to see if the setting is satisfactory.