OBS & GYNAE - Ch. 16 Assess. of Foetal Age and Size in the Second and Third Trimester Flashcards
1
Q
AXIAL RESOLUTION
A
MINIMUM DISTANCE BETWEEN TWO BRIGHT ECHOES ALONG THE PATH OF THE ULTRASOUND BEAM, WHICH IS HALF THE SPATIAL PULSE LENGTH
2
Q
CEPHALIC INDEX (CI)
A
RATIO OF THE BPD (BIPARIETAL DIAMETER) TO THE OFD (OCCIPITO-FRONTAL DIAMETER)
3
Q
LATERAL RESOLUTION
A
MINIMUM DISTANCE BETWEEN TWO BRIGHT ECHOES AT RIGHT ANGLES (PERPENDICULAR) TO THE ULTRASOUND BEAM PATH DIRECTLY RELATED TO THE BEAM WIDTH AND FOCAL ZONE
4
Q
MARCROSOMIA
A
FOETUS OVER 4, 000 GRAMS (8 POUNDS, 13 OUNCES)
5
Q
OCCIPITO-FRONTAL DIAMETER (OFD)
A
MEASUREMENT FROM FRONTAL TO THE OCCIPITAL OBTAINED AT THE SAME LEVEL AS THE BPD
6
Q
PREDICTIVE VALUE
A
PRECISION RATE OR THE PROBABILITY OF DISEASE