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Chapter 8 Measurements and Calculations

OB Calculations

NOTE:

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Ductus Venosus and Fetal HR can only be measured in Doppler Mode.

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For information on basic measurement methods, refer to ‘Basic Measurements’ and ‘Common

Measurement Methods' in this chapter.

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For references on measurement items, see 'Reference Manual Part 1'.

 Before Taking OB Measurements

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OB Basic Information

Enter the information required for OB diagnosis in the Patient Information screen. The basic OB

information includes LMP (Last Menstrual Period) and Number of Fetuses.

Once LMP is entered, EDD (Estimated Delivery Date) and GA (Gestational Age) are calculated

automatically. LMP is required for the calculation of values such as EDD and SD in obstetrics

measurement.

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EDD (LMP) = LMP + 280 days

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GA (LMP) = Current System Date – LMP

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LMP = Ovul. Date –14

The physician may choose to override the LMP and manually enter the EDD into ‘EDD (LMP)'.

Once the expected delivery date is entered, GA (Gestational Age) is automatically calculated

and displayed. EDD (LMP) is renamed to EDD, while GA (LMP) is renamed to GA (EDD).

Once DOC is entered, EDD (Estimated Delivery Date) and GA (Gestational Age) are calculated

automatically. EDD (LMP) is renamed to EDD (DOC), while GA (LMP) is renamed to GA (DOC).

Once GA is entered, EDD (Estimated Delivery Date) is entered automatically. EDD (LMP) is

renamed to EDD (GA), while GA (LMP) is renamed to GA (Clin).

A maximum of four fetuses can be entered as Number of Fetuses. The default value is ‘1’. In the

case of twins, enter ‘2’.

For further information about patient information menus and how to input patient information,

refer to ‘Patient Information’ of ‘Chapter 6. Starting Diagnosis’.

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OSCAR 23 Apr 2025 | 08:21:36

Samsung HS50 Instrukcja Użytkownika Strona 181