Decreased peak expiratory flow

What it means

A reduction in the maximum expiratory flow per minute, which can be used to measure how fast a subject can exhale as well as to judge the strength of the expiratory muscles and the condition of the large airways.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category