Effects of head-neck extension on abnormality of laryngeal mask airway function resulting from opening the mouth
| Autor: | Junichiro Kotani, Rumiko Uda, Takuro Sanuki, Shingo Sugioka, Masafumi Akatsuka, Hiroki Son |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Larynx
Adult Male medicine.medical_specialty Leak Time Factors Adolescent Oral surgery Oral Surgical Procedures Posture Oropharynx Laryngeal Masks Patient Positioning Mouth closed Young Adult Laryngeal mask airway Capnography medicine Pressure Tidal Volume Humans Airway Management Aged Aged 80 and over Mouth business.industry Respiration Head neck Intracuff pressure Middle Aged Surgery medicine.anatomical_structure Otorhinolaryngology Elective Surgical Procedures Anesthesia Female Oral Surgery business Airway Head Neck |
| Zdroj: | Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons. 69(5) |
| ISSN: | 1531-5053 |
| Popis: | This study investigated the effects of head-neck extension on abnormalities of laryngeal mask airway (LMA) function resulting from opening the mouth.A single, experienced LMA user inserted the LMA in 15 patients scheduled for elective oral surgery. Oropharyngeal leak pressure and intracuff pressure were sequentially documented in 5 mouth conditions in order (0 minutes, mouth closed plus 0° extension; 3 minutes, mouth open plus 0° extension; 6 minutes, mouth open plus 15° extension; 9 minutes, mouth open plus 30° extension; and 12 minutes, mouth open plus 45° extension).Oropharyngeal leak pressures with the mouth open plus 0° extension (30.7 ± 5.6 cm H(2)O, P.001), mouth open plus 15° extension (29.1 ± 6.8 cm H(2)O, P.001), and mouth open plus 30° extension (25.7 ± 6.1 cm H(2)O, P.001) were significantly higher than with the mouth closed plus 0° extension (19.7 ± 2.8 cm H(2)O). Compared with the position with the mouth closed plus 0° extension (60.0 ± 0 cm H(2)O), intracuff pressures were also higher with the mouth open plus 0° extension (84.5 ± 14.1 cm H(2)O, P.001), mouth open plus 15° extension (77.4 ± 11.0 cm H(2)O, P.001), and mouth open plus 30° extension (73.6 ± 9.6 cm H(2)O, P.001). Both measurement values returned to control levels when the position with the mouth open plus 45° extension was assumed (oropharyngeal leak pressure, 64.5 ± 6.5 cm H(2)O [P = .212]; intracuff pressure, 20.2 ± 4.9 cm H(2)O [P = .969]).In procedures requiring the patient to have an open mouth under general anesthesia using LMA, 45° head-neck extension achieves acceptable airway conditions. |
| Databáze: | OpenAIRE |
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