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J Korean Soc Emerg Med > Volume 28(1); 2017 > Article
Journal of The Korean Society of Emergency Medicine 2017;28(1): 17-25.
A Single-center, Prospective, Cross-over Study to Compare the Efficiency of Oxygen Supply between the OxyMaskTM and Non-rebreather Mask in Healthy Adults
Hwan Jae Shin1, Jae Hyung Choi1, Jung Won Lee1, Hyung Jun Moon1, Sae Hoon Park1, Dong Kil Jeong1, Dong Wook Lee1, Jun Hwan Song2, Bo Ra Lee3
1Department of Emergency Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
2Department of Pediatrics, Soonchunhyang University College of Medicine, Cheonan, Korea
3Biostatistical Consulting Unit, Soonchunhyang University College of Medicine, Bucheon, Korea
Correspondence  Jae Hyung Choi ,Tel: 041-570-3860, Fax: 041-592-3806, Email: emracoon@gmail.com ,
Received: September 29, 2016; Revised: September 30, 2016   Accepted: October 20, 2016.  Published online: February 28, 2017.
In this single-center, prospective, randomized, cross-over study, we compared the efficiency of oxygen supply between OxyMask and non-rebreather mask (NRM), depending on the position of the mask.
Either OxyMask or NRM was applied to 33 healthy volunteers, in a random manner, on the upper (that 1 cm upper to it), lower (that 1 cm inferior to it) and lateral malposition (that 1 cm lateral to it). After a 3-minute oxygenation, at a flow rate of 15 L/min, we measured the fractional expired oxygen concentration (FEO2), fractional expired carbon dioxide concentration (FECO2), and visual analogue scale (VAS) scores for the degree-of-wearing sensation.
OxyMask showed a lower level of FEO2 as compared with NRM in all positions. Moreover, OxyMask showed no significant difference between FEO2 and the position of the mask. However, NRM showed a significantly lower FEO2 in the upper and lateral malposition. FECO2 had no significant difference with the types and position of the mask. The mean VAS scores for the degree-of-wearing sensation were 2.2±1.5 in the OxyMask and 4.3±1.5 in the NRM (p<0.001).
OxyMask may offer greater benefit in maintaining the concentration of supplied oxygen and provide greater comfort than NRM in patients with difficulty applying the mask on an adequate location and maintaining the seal.
Key words: Oxygenation, Carbon dioxide, Mask, Visual analogue scale
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