i-gel®
(n=47)


LMA ProSeal®  (n=51)


P value


Insertion
Extra propofol
Insertion attempts; 1:2:3
Success: failure
Ease of insertion; 1:2:3
Time for insertion; seconds
Total manipulations needed (patients)
Complications of insertion (patients)


Initial airway
Quality of airway
(Good: poor: inadequate)
Fibreoptic laryngeal view; 1:2:3:4
Fibreoptic drain tube view; mucosa: other


Ventilation
Chest movement; yes: no
Vt>7 ml.kg-1 ; yes: no
Stable oxygenation; yes: no
Normal capnography; yes: no
All measures of ventilation good; yes:no
Leak pressure, cm.H2O


Maintenance
Manipulations required (patients)
Quality of airway; patent; intermittent obstruction; obstructed
Lowest oxygen saturation
Complications (patients)
Failure (patients)
Overall failures


Emergence and removal
Not tolerated during emergence; yes: no
Problems with secretions; yes: no
Blood on the airway:
Complications at removal (patients)


6
37:8:2
43:4
42:1:4
17 (10-39)
[4-240]
22 (16)
0 (0)


43:0:0

40:2:0:1
43:0



42:1
41:2
43:0
43:0
41:2
22 (17-24) [6-37]


 
1 (1)
43:0:0
98 (97-98)
[90-99]
1 (1)**
1 (1)
5


 
1
1
1
1 (1)


  8
43:4:4
50:1
48:1:2
12 (8-23.5)
[5-120]
24 (21)
0 (0)


 
50:0:0

40:5:1:0
46:0



47:0
47:0
47:0
47:0
47:0
28 (22-32) [11-40]


 
1 (1)
47:0:0
98 (97-99)
[94-100]
0 (0)
0 (0)
1


 
0
2
2
0 (0)


 
0.9
0.31
0.31
0.64
0.057
0.97
1.0


 
1.0

0.36
1.0



0.96
0.45
1.0
1.0
0.45
0.002*


 
1.0
1.0
0.75
0.96
0.96
0.17


 

0.91
1.0
1.0
0.91

*Mean difference 6 cm.H2O (95% confidence interval 3.0-9.0 cmH2O)
**patient intubated because of laryngospasm
***analysed by number of patients experiencing complication
Table 2: Device performances