Flow cytometry in diagnosis and management of large fetomaternal haemorrhage.

Abstract:

AIMS:To evaluate an indirect immunofluorescence flow cytometry technique in a series of patients with large fetomaternal haemorrhage (FMH). METHODS:Patient samples identified by Kleihauer testing in local laboratories as having FMH > 4 ml were sent for flow cytometric analysis. In a proportion of cases the mothers received anti-D immunoglobulin prophylaxis according to the flow cytometer estimate of FMH volume. RESULTS:Forty three cases of FMH were studied prospectively. The correlation between Kleihauer and flow cytometry results was poor. In 38 (88%) cases the size of FMH quantitated by flow cytometry was lower than that estimated using the Kleihauer technique. In 13 (30%) cases no Rh D immunoglobulin positive cells were detected by flow cytometry. Centralised review of the original Kleihauer films using a calibrated microscope resulted in improved, but still suboptimal correlation with flow cytometry results. In 15 cases anti-D immunoglobulin was given according to the flow cytometer estimation of FMH size, resulting in a 58% reduction in the amount of anti-D immunoglobulin given. None of the patients were immunised when tested six months later. CONCLUSIONS:Flow cytometry is helpful for the accurate quantitation and management of patients with large FMH and in cases where the presence of maternal haemoglobin F containing cells renders the Kleihauer technique inaccurate. Worthwhile reductions in the use of anti-D immunoglobulin can be achieved.

journal_name

J Clin Pathol

authors

Johnson PR,Tait RC,Austin EB,Shwe KH,Lee D

doi

10.1136/jcp.48.11.1005

subject

Has Abstract

pub_date

1995-11-01 00:00:00

pages

1005-8

issue

11

eissn

0021-9746

issn

1472-4146

journal_volume

48

pub_type

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