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Chest. 1999 Apr;115(4):980-2.

Frequency of pulmonary embolism in patients with low-probability lung scan and negative lower extremity venous ultrasound.

Author information

1
Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.

Abstract

STUDY OBJECTIVES:

To define the prevalence of pulmonary embolism (PE) in patients who are undergoing pulmonary arteriography because of a high clinical suspicion for PE but who have had a low-probability lung scan and a negative lower extremity venous ultrasound examination.

DESIGN:

A retrospective review of the medical records of 365 consecutive patients who underwent pulmonary arteriograms for suspected PE was undertaken.

RESULTS:

Of the 365 pulmonary arteriograms, 62 were performed in patients with suspected PEs despite a low-probability lung scan and a negative lower extremity venous ultrasound examination. In the latter group, five patients (8%; 95% confidence interval, 2.7% to 18%) had PEs revealed on the arteriogram.

CONCLUSIONS:

In patients whose presentation provokes a high clinical suspicion for PE despite having had a low-probability lung scan, a negative lower extremity venous ultrasound examination is insufficient to preclude proceeding to pulmonary angiography.

PMID:
10208195
DOI:
10.1378/chest.115.4.980
[Indexed for MEDLINE]

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