Table 4 Physiological variables and diaphragm shear modulus according to the outcome of the spontaneous breathing trial

Clinical variables

Systolic AP, mmHg

140 (129–157)

126 (121–159)

0.109

136 (124–150)

158 (128–161)

0.045

Heat rate, min⁻¹

93 (84–99)

97 (81–103)

0.541

110 (90–118)

111 (95–121)

0.391

Breathing pattern

V_T, mL/kg

4.1 (3.2–5.6)

4.1 (3.4–5.4)

0.894

3.2 (2.9–3.3)

3.5 (2.9–4.9)

0.423

Respiratory rate, cycles/min

24 (18–34)

25 (19–26)

0.332

24 (20–29)

32 (27–34)

0.288

Diaphragm function

ΔPdi, cmH₂O

5.9 (4.1–17.4)

9.5 (5.2–12.0)

0.777

20.7 (12.5–29.1)

15.3 (8.8–27.5)

0.570

PTPdi, cmH₂O.s/breath

3.2 (1.9–10.3)

5.7 (3.2–11.9)

0.903

11.6 (9.3–15.0)

7.9 (5.0–10.7)

0.495

PTPdi, cmH₂O.s/min

70 (47–364)

138 (73–209)

0.853

239 (187–446)

263 (134–316)

0.602

ΔSMdi, kPa

9.8 (7.8–13.4)

7.4 (4.8–9.7)

0.323

13.5 (8.8–15.9)

7.6 (5.6–14.6)

0.879