II. Indications
-
Obstructive Sleep Apnea evaluation
- Identify areas of Bronchial tree collapse (examiner observes with scope inserted during maneuver)
- May determine whether patient will benefit from Uvulopalatopharyngoplasty (UPPP)
- However, non-specific and questionable utility
- Soares (2009) Braz J Otorhinolaryngol 75(3):463-6 +PMID:19649500 [PubMed]
- Explains mechanism of inhalational injury (e.g. inhalational drug use)
- Inhalation Drug Users may perform similar maneuver when Huffing, resulting in Pneumomediastinum
III. Technique
- Patient first performs forceful expiration
- Patient attempts full inspiration against a closed mouth and nose
- Creates a negative pressure within the chest and lungs
- Opposite the Valsalva Maneuver (which is instead, forced expiration against closed nose and mouth)