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COMPARATIVE STUDY
ENGLISH ABSTRACT
JOURNAL ARTICLE
[Comparison of the Pressure on the Larynx and Tongue Using McGRATH® MAC Video Laryngoscope--Direct Vision versus Indirect Vision].
Masui. the Japanese Journal of Anesthesiology 2015 December
BACKGROUND: Studies show that McGRATH® MAC (McG) is useful during direct laryngoscopy. However, no study has examined whether McG re- duces pressure on the upper airway tract We compared direct vision with indirect vision concerning pressure on the larynx and tongue.
METHODS: Twenty two anesthesiologists and 16 junior residents attempted direct laryngoscopy of airway management simulator using McG with direct vision and indirect vision. Pressure was measured using pressure measurement film.
RESULTS: In anesthesiologists group, pressure on larynx was 14.8 ± 2.7 kgf · cm(-2) with direct vision and 12.7 ± 2.7 kgf · cm(-2) with indirect vision (P < 0.05). Pressure on the tongue was 8.8 ± 3.2 kgf cm(-2) with direct vision and 7.6 ± 2.8 kgf · cm(-2) with indirect vision (P = 0.18). In junior residents group, pressure on larynx was 19.0 ± 1.3 kgf · cm(-2) with direct vision and 14.1 ± 3.1 kgf · cm(-2) with indirect vision (P < 0.05). Pressure on the tongue was 15.4 ± 3.6 kgf · cm(-2) with direct vision and 11.2 ± 4.7 kgf · cm(-2) with indirect vision (P < 0.05).
CONCLUSIONS: McG with indirect vision can reduce pressure on the upper airway tract.
METHODS: Twenty two anesthesiologists and 16 junior residents attempted direct laryngoscopy of airway management simulator using McG with direct vision and indirect vision. Pressure was measured using pressure measurement film.
RESULTS: In anesthesiologists group, pressure on larynx was 14.8 ± 2.7 kgf · cm(-2) with direct vision and 12.7 ± 2.7 kgf · cm(-2) with indirect vision (P < 0.05). Pressure on the tongue was 8.8 ± 3.2 kgf cm(-2) with direct vision and 7.6 ± 2.8 kgf · cm(-2) with indirect vision (P = 0.18). In junior residents group, pressure on larynx was 19.0 ± 1.3 kgf · cm(-2) with direct vision and 14.1 ± 3.1 kgf · cm(-2) with indirect vision (P < 0.05). Pressure on the tongue was 15.4 ± 3.6 kgf · cm(-2) with direct vision and 11.2 ± 4.7 kgf · cm(-2) with indirect vision (P < 0.05).
CONCLUSIONS: McG with indirect vision can reduce pressure on the upper airway tract.
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