From: Respiratory distress observation scales to predict weaning outcome
Variables of respiratory distress assessment | All patients (n = 58) | SBT success (n = 25) | SBT failure (n = 33) | P value |
---|---|---|---|---|
Before SBT (n = 58) | ||||
fR/VT, breaths/min/L | 47 (34–66) | 37 (29–54) | 56 (39–73) | 0.010 |
MV-RDOS ≥ 2.6, n (%) | 10 (17) | 0 (0) | 10 (24) | 0.008 |
MV-RDOS value | 2.2 (2.0–2.3) | 2.1 (2.0–2.2) | 2.3 (2.0–2.6) | 0.014 |
Heart rate, beats/min | 92 (84–100) | 91 (84–98) | 94 (84–101) | 0.410 |
Respiratory rate, cycles/min | 22 (17–27) | 19 (14–23) | 22 (18–28) | 0.027 |
Use of neck muscle during inspiration, n (%) | 5 (9) | 0 (0) | 5 (15) | 0.063 |
Abdominal paradox during inspiration, n (%) | 0 (0) | 0 (0) | 0 (0) | 1.000 |
Facial expression of fear, n (%) | 3 (5) | 0 (0) | 3 (9) | 0.251 |
At 2-min SBT (n = 58) | ||||
fR/VT, breaths/min/L | 64 (49–79) | 52 (41–72) | 68 (57–88) | 0.010 |
MV-RDOS ≥ 2.6, n (%) | 21 (38) | 3 (12) | 18 (55) | < 0.001 |
MV-RDOS value | 2.3 (2.2–4.2) | 2.2 (2.1–2.4) | 2.6 (2.2–4.5) | 0.003 |
Heart rate, beats/min | 96 (88–102) | 92 (86–102) | 99 (90–104) | 0.063 |
Respiratory rate, cycles/min | 25 (20–30) | 23 (20–26) | 28 (24–32) | 0.005 |
Use of neck muscle during inspiration, n (%) | 11 (19) | 1 (4) | 10 (30) | 0.016 |
Abdominal paradox during inspiration, n (%) | 3 (5) | 0 (0) | 3 (9) | 0.251 |
Facial expression of fear, n (%) | 10 (17) | 3 (12) | 7 (21) | 0.489 |
At 15-min SBT (n = 40) | n = 15 | |||
fR/VT, breaths/min/L | 67 (45–89) | 50 (40–72) | 93 (60–141) | 0.002 |
MV-RDOS ≥ 2.6, n (%) | 21 (53) | 8 (32) | 13 (87) | < 0.001 |
MV-RDOS value | 2.7 (2.2–4.3) | 2.3 (2.1–4.1) | 4.3 (2.8–5.3) | < 0.001 |
Heart rate, beats/min | 96 (86–102) | 92 (82–101) | 97 (88–109) | 0.492 |
Respiratory rate, cycles/min | 25 (21–31) | 22 (18–26) | 31 (27–34) | 0.004 |
Use of neck muscle during inspiration, n (%) | 12 (30) | 5 (20) | 7 (47) | 0.091 |
Abdominal paradox during inspiration, n (%) | 5 (13) | 1 (4) | 4 (27) | 0.056 |
Facial expression of fear, n (%) | 5 (13) | 2 (8) | 3 (20) | 0.345 |
At 30-min SBT (n = 39) | n = 14 | |||
fR/VT, breaths/min/L | 72 (49–107) | 56 (41–78) | 94 (60–141) | 0.006 |
MV-RDOS ≥ 2.6, n (%) | 22 (56) | 10 (40) | 12 (86) | < 0.001 |
MV-RDOS value | 3.9 (2.2–4.5) | 2.4 (2.1–4.2) | 4.8 (4.1–6.2) | < 0.001 |
Heart rate, beats/min | 98 (89–105) | 93 (87–103) | 101 (98–116) | 0.061 |
Respiratory rate, cycles/min | 27 (22–32) | 24 (21–28) | 33 (27–38) | 0.007 |
Use of neck muscle during inspiration, n (%) | 13 (33) | 6 (24) | 7 (50) | 0.157 |
Abdominal paradox during inspiration, n (%) | 6 (15) | 1 (4) | 5 (36) | 0.016 |
Facial expression of fear, n (%) | 8 (21) | 3 (12) | 5 (36) | 0.108 |