Table 1.

Average pressures in cmH₂O, recorded immediately after insertion (Init‐P) and after flushing and some filling (Flush‐P)

N = 136	Init‐P mean; SD (range)	Flush‐P mean; SD (range)	Difference (Init‐P − Flush‐P) mean; SD (range)	t‐Test
p ves	27.4; 12.7 (−4 to 60)	37.3; 5.9 (22–51)	−9.9; 12.4 (−13 to 41)	0.000
p abd	34.7; 8.7 (0–54)	36.8; 6.5 (23–55)	2.2; 6.1 (−15 to 25)	0.000
p det	−7.2; 13.8 (−41 to 24)	0.5; 2.8 (−7 to 12)	−7.7; 13.4 (−41 to 18)	0.000

Abbreviations: Flush‐P, flushed pressure; Init‐P, initial pressure.