[Monitoring after total hip prosthesis. Value of semi-quantitative D-dimer assay].

1991 
: Criteria for positive assay of the D-dimer were defined in order to establish its diagnostic value for phlebitis in the post-operative period. A retrospective study was carried out on the files of 94 patients who had received a total hip prosthesis in 1990. A semi-quantitative assay technique was used to measure the D-dimer because it is the only method giving immediate results. Three criteria were used to classify the results: criterium A: D-dimer greater than or equal to 2 micrograms/ml; criterium B: D-dimer greater than or equal to 4 times the preceding test; absence of both of these criteria. The results were compared to echo-doppler results and confirmed by phlebography when necessary. The incidence of proximal phlebitis was low (2 percent); criterium B showed a 100 percent negative predictability and a 29 percent positive predictability. None of the cases of phlebitis diagnosed with this test had been suspected clinically. This test provides a means of patient screening and spares the need for other explorations.
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