The optical density of amniotic fluid is measured between 28 and 34 weeks of gestation. The ? OD450 peak is measured and placed in one of 4 classes.
Class
? OD450
Interpretation
A
0.00-0.025
safely deliverable at term
B
0.026-0.10
repeat amniocentesis in 2 weeks. If the ? OD then decreases, then delivery is at 37-40 weeks
C
0.11-0.23
amniocentesis in 1 week. If ? OD then is decreased, delivery could be at 34-36 weeks
D
> 0.25
these infants required immediate intervention
Limitation:
• The week of pregnancy during which delivery should be performed is not specified.
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Specialty: Obstetrics & Gynecology, Clinical Laboratory
ICD-10: ,
