nuchal translucency screening
Post on 01-Nov-2014
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NUCHAL TRANSLUCENCY SCREENING
Provided byAtlanta Perinatal Associates
RISK FOR DOWN SYNDROME (AND OTHER CHROMOSOMAL ABNORMALITIES)
BASED ON MOTHER'S AGE
1/7
1/9
1/50
1/40
1/30
1/24
1/20
1/15
1/12
1/270
1/200
1/340
1/320
1/385
1/370
1/500
1/450
1/65
1/80
1/100
1/130
1/170
0.0%
4.0%
8.0%
12.0%
16.0%
15-24
25-29
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
“Low Risk”
“High Risk”
WHAT IS AN NT?
NORMAL NT
ABNORMAL NT
NT Measurement Allows Adjustment in Age-Related Risk
Free Beta and PAPP-A Allow Further Adjustment in Risk
1/7
1/9
1/50 1/40 1/30 1/24
1/20
1/15
1/12
1/270
1/200
1/340
1/320
1/385
1/370
1/500
1/450
1/65
1/80
1/100
1/130
1/170
0.0%
4.0%
8.0%
12.0%
16.0%
15-
24
25-
29
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
PAPP-A FREE BETA
RISK FOR DOWN SYNDROME (Adjusted following NT Measurement)
1/7
1/9
1/50
1/40
1/30
1/24
1/20
1/15
1/12
1/270
1/200
1/340
1/320
1/385
1/370
1/500
1/450
1/65
1/80
1/100
1/130
1/170
0.0%
4.0%
8.0%
12.0%
16.0%
15-24
25-29
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
“Low Risk”
“High Risk”
NT Measurement Allows Adjustment in Age-Related Risk
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