Table 1.

Cuff pressures observed after inflating the pilot balloon in Phase 1 of the study

	Syringe 1	Syringe 2	Syringe 3	Syringe 4	Syringe 5	p value
P10	45.2±7.5	54.8±10.1	48.2±4.3	47±6.1	59.6±9.2	p=0.043*
P20	84±16.5	53.2±5	48.8±4.6	51.6±14.5	35±2.4	p<0.001**

Values are expressed as the mean±standard deviation of the five measurements performed with each syringe. P10 - maneuver performed with a 10mL syringe; P20 - maneuver performed with a 20mL syringe.

^*comparisons between 10mL syringes;

^**comparisons between 20mL syringes.