Skip to main content

Table 1 Effects of extension tube, cuff shape and tube size of endotracheal tubes on cuff pressure drop during measurement procedure

From: Decrease in cuff pressure during the measurement procedure: an experimental study

  With an extension tube Without an extension tube
7 mm 8 mm 9 mm 7 mm 8 mm 9 mm
Pyriform shape 8.9 ± 0.7 9.4 ± 0.5 9.2 ± 0.6 6.5 ± 1.1 6.6 ± 1.1 6.5 ± 0.6
Spherical shape 6.2 ± 1.0 5.9 ± 1.5 5.6 ± 0.8 5.4 ± 1.2 4.4 ± 0.6 4.1 ± 1.0
  1. Mean ± SD (cmH2O). The cuff pressure drops are shown for three sizes of endotracheal tubes (internal diameter, 7, 8, and 9 mm), with or without an extension tube, and two kinds of cuff shapes (pyriform and spherical).