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Clinical usefulness of adjusted D-dimer cut-off values to exclude pulmonary embolism in a community hospital emergency department patient population.
Acta Radiol. 2012 Sep 01; 53(7):765-8.AR

Abstract

BACKGROUND

Plasma D-dimer measurement is used in the assessment of the clinical probability of pulmonary embolism (PE), in order to minimize the requirement for pulmonary computed tomography angiography (CTA).

PURPOSE

To evaluate whether doubling the threshold value of serum D-dimer from 500 μg/L to 1000 μg/L could safely reduce utilization of pulmonary CTA to exclude PE in our emergency department patient population.

MATERIAL AND METHODS

Emergency department patients evaluated for PE with a quantitative D-dimer assay and pulmonary CTA were eligible for inclusion. D-dimer values were retrospectively collected in all included patients. Pulmonary CT angiograms were reviewed and scored as positive or negative for PE. Receiver-operating characteristic (ROC) analysis was used to determine the accuracy of quantitative D-dimer measurements in differentiating between positive and negative PE patients as per CTA.

RESULTS

A total of 237 consecutive patients underwent pulmonary CTA and had a D-dimer measurement performed. Median D-dimer level was 1007 μg/L and in 11 (5%) patients the pulmonary CT CTA was positive for PE. The ROC curve showed an area under the curve (AUC) of 0.91 (P < 0.0001). Increasing the D-dimer threshold value of 500 μg/L to 1000 μg/L increased the specificity from 8% to 52% without changing the sensitivity.

CONCLUSION

Adjusting the D-dimer cut-off value for the emergency department community population and patient age increases the yield and specificity of the ELISA D-dimer assay for the exclusion of PE without reducing sensitivity.

Authors+Show Affiliations

Department of Radiology, Bridgeport Hospital, Yale University School of Medicine, Bridgeport, CT, USA. jvossen1@jhmi.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22761348

Citation

Vossen, Josephina A., et al. "Clinical Usefulness of Adjusted D-dimer Cut-off Values to Exclude Pulmonary Embolism in a Community Hospital Emergency Department Patient Population." Acta Radiologica (Stockholm, Sweden : 1987), vol. 53, no. 7, 2012, pp. 765-8.
Vossen JA, Albrektson J, Sensarma A, et al. Clinical usefulness of adjusted D-dimer cut-off values to exclude pulmonary embolism in a community hospital emergency department patient population. Acta Radiol. 2012;53(7):765-8.
Vossen, J. A., Albrektson, J., Sensarma, A., & Williams, S. C. (2012). Clinical usefulness of adjusted D-dimer cut-off values to exclude pulmonary embolism in a community hospital emergency department patient population. Acta Radiologica (Stockholm, Sweden : 1987), 53(7), 765-8. https://doi.org/10.1258/ar.2012.120105
Vossen JA, et al. Clinical Usefulness of Adjusted D-dimer Cut-off Values to Exclude Pulmonary Embolism in a Community Hospital Emergency Department Patient Population. Acta Radiol. 2012 Sep 1;53(7):765-8. PubMed PMID: 22761348.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Clinical usefulness of adjusted D-dimer cut-off values to exclude pulmonary embolism in a community hospital emergency department patient population. AU - Vossen,Josephina A, AU - Albrektson,Joshua, AU - Sensarma,Anirban, AU - Williams,Scott C, Y1 - 2012/07/03/ PY - 2012/7/5/entrez PY - 2012/7/5/pubmed PY - 2012/12/10/medline SP - 765 EP - 8 JF - Acta radiologica (Stockholm, Sweden : 1987) JO - Acta Radiol VL - 53 IS - 7 N2 - BACKGROUND: Plasma D-dimer measurement is used in the assessment of the clinical probability of pulmonary embolism (PE), in order to minimize the requirement for pulmonary computed tomography angiography (CTA). PURPOSE: To evaluate whether doubling the threshold value of serum D-dimer from 500 μg/L to 1000 μg/L could safely reduce utilization of pulmonary CTA to exclude PE in our emergency department patient population. MATERIAL AND METHODS: Emergency department patients evaluated for PE with a quantitative D-dimer assay and pulmonary CTA were eligible for inclusion. D-dimer values were retrospectively collected in all included patients. Pulmonary CT angiograms were reviewed and scored as positive or negative for PE. Receiver-operating characteristic (ROC) analysis was used to determine the accuracy of quantitative D-dimer measurements in differentiating between positive and negative PE patients as per CTA. RESULTS: A total of 237 consecutive patients underwent pulmonary CTA and had a D-dimer measurement performed. Median D-dimer level was 1007 μg/L and in 11 (5%) patients the pulmonary CT CTA was positive for PE. The ROC curve showed an area under the curve (AUC) of 0.91 (P < 0.0001). Increasing the D-dimer threshold value of 500 μg/L to 1000 μg/L increased the specificity from 8% to 52% without changing the sensitivity. CONCLUSION: Adjusting the D-dimer cut-off value for the emergency department community population and patient age increases the yield and specificity of the ELISA D-dimer assay for the exclusion of PE without reducing sensitivity. SN - 1600-0455 UR - https://www.unboundmedicine.com/medline/citation/22761348/Clinical_usefulness_of_adjusted_D_dimer_cut_off_values_to_exclude_pulmonary_embolism_in_a_community_hospital_emergency_department_patient_population_ L2 - https://journals.sagepub.com/doi/10.1258/ar.2012.120105?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -