Page 170 - Clinical Application of Mechanical Ventilation
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136 Chapter 5
TABLE 5-6 Selection of Laryngeal Mask Airway and Maximum Cuff Inflation Volume
Size Patient group Maximum Cuff Volume
1 Neonates and infants up to 5 kg 4 mL
1.5 Infants between 5 and 10 kg 7 mL
2 Infants and children between 10 and 20 kg 10 mL
2.5 Children between 20 and 30 kg 14 mL
3 Children between 30 to 50 kg and small adults 20 mL
4 Adults 50 to 70 kg 30 mL
5 Adults 70 to 100 kg 40 mL
6 Adults over 100 kg 50 mL
(Data from LMA North America, Inc., 2012.)
© Cengage Learning 2014
completely deflated or partially inflated (Dingley & Asai, 1996), the LMA is in-
serted blindly without a laryngoscope through the mouth and advanced along the
hard palate. It is then further advanced to the posterior pharynx and turned toward
the trachea and larynx. At this point, the LMA may be guided with fingers to as-
certain that it makes the proper turn (Watson et al., 1999). Figure 5-9(A)–(G) show
the standard insertion technique of the LMA.
Removal of LMA
The LMA may be
removed safely when the The LMA may be discontinued when an upper airway is no longer needed for venti-
patient is anesthetized or lation and oxygenation. Removal can be done safely when the patient is anesthetized
awake.
or awake. During removal of the LMA, the patient must be monitored carefully
Courtesy of LMA North America, Inc. Courtesy of LMA North America, Inc.
Figure 5-9(A) Method for holding the LMA Figure 5-9(B) With the head extended
for insertion. and the neck flexed, carefully flatten the LMA tip
against the hard palate.
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