Manufactured for Sherwood Medical (and later bought out by Cheeseborough-Ponds, or vice-versa?). Used a disposable cardboard tube with a mesh that acted as a pneumotach. Photo from an International Biomedical Engineering listing.
Manufactured for Sherwood Medical (and later bought out by Cheeseborough-Ponds, or vice-versa?). Used a disposable cardboard tube with a mesh that acted as a pneumotach. Photo from an International Biomedical Engineering listing.