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Table 2 Time of insertion, attemps and ventilation quality (tidal volumes, estimated leakage).

From: Laypersons can successfully place supraglottic airways with 3 minutes of training. A comparison of four different devices in the manikin

 

LMA

Cobra

LT

FT

Time to insertion

23.8 ± 21.2 (17) [9-120]

31.9 ± 27.9 (19) [9-120]

21.9 ± 14.7 (15) [8-75]

17.9 ± 14.6 (15) [8-120]

Success, n

138 (97.1%)

105 (95.8%)

139 (98.6%)

141 (100%)

Leakage, tidal volumes

   

   no, > 800 ml

36 (25.5%)

96 (68.1%)

97 (68.8%)

107 (75.9%)

   minor, 500-800 ml

101(71.6%)

39 (27.7%)

42 (29.8%)

34 (24.1%)

   major, < 500 ml

4 (2.8%)

6 (4.3%)

2 (1.4%)

0

Attempts,%

    

   1st/2nd/3rd

80.9/14.9/4.3

66.7/22/11.3

71.6/21.3/7.1

92.9/7.1/0

  1. Tidal volumes > 500 ml were quoted sufficient according the ILCOR guidelines. With all devices a tidal volume greater than 150 ml (estimated dead space) could be applied. Data are presented as mean +/- standard deviation, (median), [range] and number.