Silhouette Inventor Dr. Robert Guyette
The following videos were shot with a special infra-red camera designed for thermal imaging. In the videos you will notice trace amounts of nitrous oxide that escape from various types of nasal masks. As you can see the Porter Silhouette is by far the best option for scavenging efficiency.
Video of Porter’s SILHOUETTE Nitrous Hood
At 13 seconds the patient opens her mouth to demonstrate that N2O is actually flowing.