Trimester Obstetric Scanning

These flashcards cover key terminology and concepts from the lecture on trimester obstetric scanning.

Sonography

The primary tool for confirmation of pregnancy.

Panniculus

An apron of excess skin and fat hanging from the abdomen below the waistline.

Polyhydramnios

An excessive amount of amniotic fluid.

Oligohydramnios

A deficiency of amniotic fluid.

Gestational age

The age of the fetus calculated from the first day of the last menstrual period.

Fetal presentation

The position of the fetus in relation to the birth canal, such as vertex or breech.

Biometry

The measurement of the fetus's size and growth parameters.

Amniotic fluid index (AFI)

A quantitative measure of amniotic fluid to assess fetal well-being.

Fetal lie

The direction the fetus is positioned in the uterus, such as longitudinal or transverse.

Bradycardia

A slow heart rate, specifically <120 beats per minute in a fetus.

Tachycardia

A rapid heart rate, specifically >160 beats per minute in a fetus.

Chorionic membranes

Membranes that form around the fetus, which can be either fused or separate in multiple pregnancies.

Biparietal diameter (BPD)

A measurement of the fetal head from one parietal bone to the other.

Placenta previa

A condition where the placenta is located near or over the cervix.

Placental abruption

A condition where the placenta detaches from the uterus before delivery.

Fetal anomalies

Abnormalities in the fetus that can be detected through imaging.

Situs

The arrangement of internal organs in the fetus.