Definitions for "Entonox"
Also known as gas and air. It's a mixture of 50% oxygen and 50% nitrous oxygen, breathed in through a mask during labour. It gives pain relief as contractions peak.
A gas, made up of 50% oxygen and 50% nitrous oxide. The vast majority of maternity hospitals pump gas and air to all of their delivery rooms from a central supply, so it's always available when you want it.
Also known as Nitronox. A mixture of gases: 50% oxygen, 50% nitrous oxide. An effective analgesia for pain relief.