Nitrous Oxide-Oxygen Analgesia: The Performance of the MC Mask Delivery System | Zendy

R. Ooi | Zendy; Pragnesh Joshi | Zendy; N. Soni | Zendy

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Nitrous Oxide-Oxygen Analgesia: The Performance of the MC Mask Delivery System

Author(s) -

R. Ooi,

Pragnesh Joshi,

N. Soni

Publication year - 1992

Publication title -

journal of the royal society of medicine

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.38

H-Index - 81

eISSN - 1758-1095

pISSN - 0141-0768

DOI - 10.1177/014107689208500908

Subject(s) - nitrous oxide , oxygen delivery , oxygen , anesthesia , medicine , chemistry , organic chemistry

Nitrous oxide administration via an oxygen facemask such as the Mary Catterall (MC) is an accepted technique for supplementing regional anaesthesia. This study assessed the range of nitrous oxide and oxygen concentrations delivered to the trachea using a mechanical lung model. The inspired concentrations of these two gases were determined by the total fresh gas inflow rates, their concentrations in the fresh gas mixture and the peak inspiratory flow rate of the analogue lung. A 1:1 nitrous oxide-oxygen mixture in the fresh gas with an inflow rate of 4-6 l/min is recommended to ensure adequate oxygen delivery into the trachea as well as achieving the therapeutic concentrations of nitrous oxide (20-30%).

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