Effect of nasal cannula oxygen administration on oxygen concentration at facial and adjacent landmarks


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Orhan-Sungur M. , Komatsu R., Sherman A., Jones L., Walsh D., Sessler D. I.

ANAESTHESIA, cilt.64, ss.521-526, 2009 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 64
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1111/j.1365-2044.2008.05820.x
  • Dergi Adı: ANAESTHESIA
  • Sayfa Sayıları: ss.521-526

Özet

An oxygen-enriched atmosphere enhances the potential for operating-room fires. We thus determined oxygen concentrations at various facial landmarks during oxygen administration via nasal cannulae. Thirteen supine volunteers were draped similarly to patients undergoing a cervical-node biopsy. Oxygen was delivered in random order through nasal cannulae at rates of 2, 4, and 6 l.min(-1). Oxygen concentration was measured at pre-determined facial landmarks and also distal to the drape at non-facial sites. At a flow of 2 l.min(-1), oxygen concentrations exceeded 23% only within a few centimetres of the nasal cannula. Concentration increased as a function of flow, but rarely exceeded 26%. At all flow rates, concentrations distal to the drape were < 24%. To reduce combustion risk, ignition sources should be kept at least 10 cm from the oxygen outlet when using nasal cannula at a flow rate >= 4 l.min(-1).