# Pulmonary Embolism Rule out Criteria – PERC Score

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[html]This tool can be used to rule out pulmonary embolism if the pre-test probability of PE is low. A Wells PE Score of 1 or 0 is one way to meet this requirement (1.3% probability). <a href="../../blood-lymph/wells-pe/" target="_blank">Wells PE Score calculator</a>
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Findings: (All answers must be 'True' to Rule out PE)
[select name="age" value="false=0|true=1"] <-- Age < 50?
[select name="HR" value="false=0|true=1"] <-- HR < 100?
[select name="O2" value="false=0|true=1"] <-- O2 Sat on Room Air >94%?
[select name="prior" value="false=0|true=1"] <-- No Prior History of DVT/PE?
[select name="trauma" value="false=0|true=1"] <-- No Recent Trauma or Surgery?
[select name="hemoptysis" value="false=0|true=1"] <-- No Hemoptysis?
[select name="estrogen" value="false=0|true=1"] <-- No Exogenous Estrogen?
[select name="dvt" value="false=0|true=1"] <-- No Clinical Signs Suggesting DVT?
Score --> [calc value="score=(age)+(HR)+(O2)+(prior)+(trauma)+(hemoptysis)+(estrogen)+(dvt)" memo="score"]
Interpretation: [calc value="score=(age)+(HR)+(O2)+(prior)+(trauma)+(hemoptysis)+(estrogen)+(dvt);score>7?'1.8% chance of pulmonary embolism *if* pretest probability was low (Wells PE score of 1 or less)':'Pulmonary embolism is not ruled out'" memo="Interpretation"]
[html]<hr>[/html][checkbox memo="display/hide references" name="footnotes" value=""][conditional field="footnotes" condition="(footnotes).is('')"][html]
reference: <a href="http://www.ncbi.nlm.nih.gov/pubmed/15304025" target="_blank">Kline (2004) J Thromb Haemost. 2:1247-55.</a>
posted by: Mark Morgan, M.D.
post/review dates: July 10, 2012; August 21, 2015
revision history: <a href="https://github.com/soapnote/SOAPnote-site/tree/master/generator/txt/blood-lymph/perc.txt" target="_blank">www.github.com/soapnote/SOAPnote-site/tree/master/generator/txt/blood-lymph/perc.txt</a>
This tool can be used to rule out pulmonary embolism if the pre-test probability of PE is low. A Wells PE Score of 1 or 0 is one way to meet this requirement (1.3% probability). Wells PE Score calculator

Findings: (All answers must be 'True' to Rule out PE)
<-- Age < 50?
<-- HR < 100?
<-- O2 Sat on Room Air >94%?
<-- No Prior History of DVT/PE?
<-- No Recent Trauma or Surgery?
<-- No Hemoptysis?
<-- No Exogenous Estrogen?
<-- No Clinical Signs Suggesting DVT?
Score --> scorescore=(age)+(HR)+(O2)+(prior)+(trauma)+(hemoptysis)+(estrogen)+(dvt)
Interpretation: Interpretationscore=(age)+(HR)+(O2)+(prior)+(trauma)+(hemoptysis)+(estrogen)+(dvt);score>7?'1.8% chance of pulmonary embolism *if* pretest probability was low (Wells PE score of 1 or less)':'Pulmonary embolism is not ruled out'

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Result - Copy and paste this output: