Comparison of Pressure Changes by Head and Neck Position between High-Volume Low-Pressure and Taper-Shaped Cuffs: A Randomized Controlled Trial

Table 2

Cuff pressure changes by head and neck position with HVLP and taper-shaped cuffs. HVLP group: trachea was secured using a tracheal tube with a high-volume low-pressure cuff; Taper group: trachea was secured using a tracheal tube with a taper-shaped cuff. Data are presented as median [interquartile range]. .

(a) Initial cuff pressure 15 cmH₂O

	Flexion	Extension	Rotation
HVLP	5.3 [3.9–7.7]	3.4 [2.4–4.2]	0.3 [−0.8–1.1]
Taper	2.6 [1.5–3.5]	0.2 [−0.2–0.4]	0.1 [−0.7–0.6]
value	<0.001	<0.001	0.41

(b) Initial cuff pressure 20 cmH₂O

	Flexion	Extension	Rotation
HVLP	8.4 [7.6–9.4]	4.7 [3.9–5.4]	0.4 [−0.4–1.2]
Taper	5.4 [4.0–6.5]	0.9 [0.4–1.8]	−0.6 [−1.5–0.4]
value	<0.001	<0.001	0.12

(c) Initial cuff pressure 25 cmH₂O

	Flexion	Extension	Rotation
HVLP	10.3 [8.5–13.1]	5.0 [2.7–7.0]	−0.1 [−0.4–0.5]
Taper	4 [2.6–5.3]	0.5 [−0.4–1.4]	0.1 [−1.0–0.9]
value	<0.001	<0.001	0.91