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Asthma exacerbation

Prevalence
Clinical features
Differential Diagnosis
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Clinical features

Pulsus paradoxus is not very helpful at diagnosing airflow limiation b

Why?

Pulsus paradoxus does not usefully help rule in or rule our airflow limitation.

Patient Target Disorder and
Reference Standard		 Diagnostic Test LR+
(95% CI)		 Post-test Probability LR-
(95% CI)		 Post-test Probability
suspected airflow limitation b
(pre-test probability: 33%)		 airflow limitation
(FEV1 and FVC by spirometry)		 pulsus paradoxus > 15 mmHg 3.7
65% 0.62
23%

 

Expiry date: November 2003
Levels of Evidence used in grading these guides

Authors   B   Wong , CM   Ball
Reviewer   B R   O'Driscoll
CAT Writers   B   Wong , CM   Ball