LOINC display name : Trisomy 13, trisomy 18 or triploidy risk Calc Ql (Plasma cell-free WBC DNA) [Interp];
LOINC long common name : Trisomy 13, trisomy 18 or triploidy risk [Interpretation] in Plasma cell-free WBC
DNA Qualitative by calculation;
LOINC short name : T13 T18 Trip risk WBC.DNA cfDNA Calc-Imp;
LOINC description : The ordinal interpretation for the combined fetal trisomy 13 trisomy 18 triploidy
risk is determined in cases where the SNP-based noninvasive prenatal test did not
return a result due to low fetal fraction (FF) or the inability to make a high-confidence
call. FF is known to be lower in cases of trisomy 13, trisomy 18 and digynic (maternal)
triploidy, but not all cases of low FF is due to aneuploidy. Combined risk calculations
may include the FF value, gestational age (GA), maternal weight (MW) and prior risk
data to determine the overall risk.[PMID: 30014528];