No marker for making sure that the patient has VAP

Unfortunately there is no marker for making sure that the patient has VAP.

One of the marker which is coming up now a days is CPIS scoring. But this too has less sensitivity and specificity issues. A good surrogate marker for VAP , will be need of the hour in upcoming research topics. Why do we need a marker? Only when we can say for sure that the patient has VAP,then only we can treat him fully. Otherwise we may end up treating patients, who do not require the treatment.