Applications and examples

Capnographic recording offers two distinct advantages :

  1. cooperation-independency : the subject may be resting or even sleeping,
  2. non-invasiveness : recording may be performed for several hours.

These two features make it the best method for two kinds of applications :

  1. effort-independent bronchospasm measurements (especially in children and non-cooperative adults),
  2. continuous asthma monitoring.

"Effort-independent" bronchospasm evaluations

Bronchospasm monitoring under various conditions

Method limitations
Reliable capnographic recording has only two requirements : 1) the subject should be relaxed, 2) nasal airways should be permeable (at least on one side!). This excludes tests on very anxious or restless patients as well as on patients with untreated obstructive rhinitis.