Vap Cholesterol Test Is an apoB test a better way to check your cholesterol? ERR: Diagnosing VAP is challenging due to inaccurate clinical signs and tests. This review highlights the lack of reliable biomarkers, although some show promise. As the reference standard is problematic, subphenotyping VAP Ventilator Associated Pneumonia (VAP): Stop ordering a culture and hoping for the best. The right respiratory sample, collected at the right time and reported with interpretation, changes treatment. Here's what matters : Researchers screen for ventilator associated pneumonia infection through breath test EurekAlert!