Table 2.
Electrical impedance tomography variables (mean and 95% confidence interval) of the coelom in isoflurane-anaesthetised chickens in dorsal, ventral, right, and left lateral recumbencies.
| Recumbency position | ||||
|---|---|---|---|---|
| Variable | Dorsal | Ventral | Right lateral | Left lateral |
| CoVRL (%) | 48.8 (47.6–50.1)a, b | 48.4 (47.2–49.7)c | 51.9 (50.7–53.1)a, c, d | 46.9 (45.6–48.2)b, d |
| CoVVD (%) | 52.3 (51.1–53.5)a, b | 55.0 (53.8–56.2)a, c | 53.1 (51.9–54.3)c | 54.2 (53.0–55.5)b |
| R:L ratio | 1.20 (0.96–1.44)a, b | 1.27 (1.03–1.51)c, d | 0.83 (0.59–1.07)a, c, e | 1.61 (1.36–1.86)b, d, e |
| ΔZRV (%) | 0.31 (0.20–0.42)a | 0.18 (0.08–0.29)a, b | 0.35 (0.24–0.45)b | 0.31 (0.20–0.42) |
| ΔZRCV (%) | 21.3 (16.4–26.2)a, b | 16.1 (11.2–21.0)a, c | 16.5 (11.6–21.4)b, d | 22.5 (17.5–27.4)c, d |
| ΔZRCD (%) | 31.3 (27.5–35.0)a, b | 37.5 (33.7–41.2)a, c | 24.2 (20.5–27.9)b, c, d | 36.0 (32.1–39.9)d |
| ΔZRD (%) | 1.03 (0.37–1.68)a | 1.26 (0.60–1.91)b | 2.18 (1.52–2.84)a, b | 1.85 (1.16–2.54) |
| ΔZLV (%) | 0.79 (0.5–1.08)a, b | 0.31 (0.02–0.60)a, c, d | 0.62 (0.33–0.91)c | 0.53 (0.24–0.83)b, d |
| ΔZLCV (%) | 24.4 (20.9–27.9)a, b | 19.6 (16.1–23.1)c | 30.1 (26.6–33.6)a, c, d | 16.5 (12.8–20.1)b, d |
| ΔZLCD (%) | 19.6 (16.9–22.2)a, b | 23.9 (21.3–26.6)a, c | 23.5 (20.8–26.2)b, d | 20.0 (17.3–22.8)c, d |
| ΔZLD (%) | 1.33 (0.72–1.94)a, b | 1.15 (0.54–1.76)c, d | 2.53 (1.92–3.14)a, c | 2.24 (1.60–2.88)b, d |
| TIV (AU) | 6.65 (5.30–8.00) | 5.62 (4.27–6.96) | 6.38 (5.03–7.72) | 6.37 (4.98–7.76) |
| Inspiratory time (s) | 2.31 (1.82–2.80)a | 2.57 (2.08–3.05) | 2.70 (2.21–3.19)a | 2.50 (2.00–2.99) |
EIT, electrical impedance tomography; CoVRL and CoVVD, centre of ventilation right to left and ventral to dorsal, respectively; R,L ratio, right to left ratio; ΔZR and ΔZL, impedance change within the right and left regions, respectively, in percentage of total impedance change; ΔZRD, ΔZRCD, ΔZRCV, ΔZRV, ΔZLD, ΔZLCD, ΔZLCV, ΔZLV, impedance change within right and left (dorsal, central-dorsal, central-ventral, ventral) regions, respectively, in percentage of total impedance change; TIV, tidal impedance variation; AU, arbitrary units. Means sharing the same superscript (a, b, c, d, e) within a row indicates statistically significant differences (P < 0.05).