Diaphragmatic ultrasonography-based rapid shallow breathing index for predicting weaning outcome during a pressure support ventilation spontaneous breathing trial

Table 2 Comparison of weaning parameters between patients with weaning success vs failure

Variables	All (n = 110)	Weaning success (n = 73)	Weaning failure (n = 37)	P value
RR at the end of SBT, breaths/min	22 ± 4.3	21.2 ± 3.7	23.5 ± 4.9	0.005
VT, ml	446 ± 107.1	456.1 ± 109.7	426 ± 101.9	0.167
PaO₂/FiO₂ (mmHg)	271.1 [216.7–332.7]	277.5 [222.5–321.3]	248.6 [206.6–345.2]	0.371
RSBI, breaths/min/L	48.5 [37.7–59.8]	46.2 [37.5–55.6]	53.6 [39.9–70.6]	0.018
DE, mm	16 [13–19]	17 [14.5–19.5]	12 [10–15.5]	< 0.001
DT at end inspiration, mm	2.1 [1.8–2.4]	2.1 [1.8–2.4]	2.1 [1.8–2.4]	0.493
DT at end expiration, mm	1.5 [1.4–1.8]	1.5 [1.3–1.8]	1.6 [1.4–2]	0.27
DTF, %	33.3 [26.3–40]	37.5 [33.3–41.9]	23.1 [19.5–29.4]	< 0.001
DE-RSBI, breaths/min/mm	1.4 [1.2–1.8]	1.3 [1–1.5]	1.9 [1.5–2.4]	< 0.001
DTF-RSBI, breaths/min/%	61.9 [53.1–82.9]	57.2 [47.8–63.5]	97.8 [68.2–135.6]	< 0.001

RR respiratory rate, SBT spontaneous breathing trial, VT tidal volume, PaO₂/FiO₂ arterial oxygen partial pressure to inspired oxygen fraction, RSBI rapid shallow breathing index, DE diaphragmatic excursion, DT diaphragm thickness, DTF diaphragm thickening fraction, DE-RSBI diaphragmatic excursion rapid shallow breathing index, DTF-RSBI diaphragm thickening fraction rapid shallow breathing index

ISSN: 1471-2466