What are N2O flowmeters?   Nitrous oxide (N2O) flowmeters or sensors are instruments used to monitor, measure, or record the rate of flow, pressure, or discharge of nitrous oxide in an anaesthesia system.   History and evolution of N2O flowmeters   Until the late 19th centu...

What are porter nasal masks?   Porter nasal mask, or Porter SILHOUETTE Nasal Masks, are single-patient nasal masks and breathing circuits designed with lightweight tubing and comfortable and conforming masks. The design of these masks provides maximum comfort for the patient and allows a de...