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Noninvasive fetal RHD genotyping to guide targeted anti-D prophylaxis-an external quality assessment workshop
Copenhagen Univ Hosp, Denmark; Natl Univ Singapore, Singapore.
Copenhagen Univ Hosp, Denmark; Natl Univ Singapore, Singapore.
Oslo Univ Hosp, Norway.
Scottish Natl Blood Transfus Serv, Scotland.
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2019 (Engelska)Ingår i: Vox Sanguinis, ISSN 0042-9007, E-ISSN 1423-0410, Vol. 114, nr 4, s. 386-393Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background and Objectives Fetal RHD genotyping of cell-free fetal DNA from RhD-negative pregnant women can be used to guide targeted antenatal and postnatal anti-D prophylaxis for the prevention of RhD immunization. To assure the quality of clinical testing, we conducted an external quality assessment workshop with the participation of 28 laboratories. Materials and Methods Aliquots of pooled maternal plasma were sent to each laboratory. One sample was positive, and the second sample was negative for fetal RHD, verified by pre-workshop testing using quantitative real-time PCR (qPCR) analysis of RHD exons 4, 5, 7 and 10. Plasma samples were shipped at room temperature. A reporting scheme was supplied for data collection, including questions regarding the methodological setup, results and clinical recommendations. Different methodological approaches were used, all employing qPCR with a total of eight different combinations of RHD exon targets. The samples were tested blindly. Results Fetal RHD genotyping was performed with no false-negative and no false-positive results. One inconclusive result was reported for the RHD-positive sample, and four inconclusive results were reported for the RHD-negative sample. All clinical conclusions were satisfactory. Conclusion This external quality assessment workshop demonstrates that despite the different approaches taken to perform the clinical assays, fetal RHD genotyping is a reliable laboratory assay to guide targeted use of Rh prophylaxis in a clinical setting.

Ort, förlag, år, upplaga, sidor
WILEY , 2019. Vol. 114, nr 4, s. 386-393
Nyckelord [en]
fetal RHD genotyping; cell-free fetal DNA; external quality assessment; Rh prophylaxis
Nationell ämneskategori
Hematologi
Identifikatorer
URN: urn:nbn:se:liu:diva-158851DOI: 10.1111/vox.12768ISI: 000470935800012PubMedID: 30834546OAI: oai:DiVA.org:liu-158851DiVA, id: diva2:1337645
Tillgänglig från: 2019-07-16 Skapad: 2019-07-16 Senast uppdaterad: 2019-07-16

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Holmertz, CamillaNyström, Sofia
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Institutionen för klinisk och experimentell medicinMedicinska fakultetenKlinisk immunologi och transfusionsmedicinAvdelningen för hematopoes och utvecklingsbiologi
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