Group | ESPB (n = 93) | CRI (n = 39) | ESPB vs CRI p value | OR (95% CI) | |
---|---|---|---|---|---|
Information | |||||
Age (months) | 70 ± 34 | 71 ± 29 | 0.92 |  | |
Sex (n. of dogs) | 10 F (10.7%) 33 FS (35.5%) 18 M (19.4%) 32 MN (34.4%) | 2 F (5.1%) 11 FS (28.2%) 8 M (20.5%) 18 MN (46.2%) | 0.18 |  | |
Body weight (kg) | 10 (3.1–38.3) | 8.6 (3.9–41) | 0.29 |  | |
MFS status (n. of dogs) | 35 MFS-1 or 2 (37.6%) 53 MFS-3 (57%) 5 MFS-4 (5.4%) | 31 MFS-1 or 2 (79.5%) 8 MFS-3 (20.5%) 0 MFS-4 (0%) | < 0.0001 | 5.87 (2.39–13.70) * | |
Pre-anaesthetic medication | Methadone (n. of dogs) | 93 (100%) | 39 (100%) | 1 | Â |
Methadone dose (mg/kg) | 0.2 (0.1–0.3) | 0.25 |  |  | |
Acepromazine (n. of dogs) | 1 (1.1%) | 0 | 1 | Â | |
Acepromazine (mg/kg) | 0.01 | Â | Â | Â | |
Dexmedetomidine (n. of dogs) | 89 (95.7%) | 0 | < 0.0001 |  | |
 | Dexmedetomidine (μg/kg) | 1 (0.5–2) |  |  |  |
Time from premedication to start of surgery (min) | 85 (35–240) | 90 (60–150) | 0.18 |  | |
Induction agent | Propofol (n. of dogs) | 85 (91.4%) | 39 (100%) | 0.10 | Â |
Propofol (mg/kg) | 2.4 (0.9–5.4) | 4.2 (2.4–7.8) | < 0.0001 |  | |
Alfaxalone (n. of dogs) | 8 (8.6%) | 0 | 0.10 | Â | |
Alfaxalone (mg/kg) | 0.9 (0.7–1.8) |  |  |  | |
Maintenance of anaesthesia (n. of dogs) | 90 Isoflurane (96.8%) 3 Sevoflurane (3.2%) | 39 Isoflurane (100%) 0 Sevoflurane (0%) | 0.55 | Â | |
MAC multiple IAA | 0.94 (0.86–1.1) | 1.08 (0.91–1.19) | < 0.0001 |  | |
Type of disc herniation (n.) | 91 extrusions (97.8%) 2 protrusions (2.2%) | 39 extrusions (100%) 0 protrusions (0%) | 1 | Â | |
Lateralisation of herniated disc (n.) | 51 left (54.8%) 42 right (45.2%) | 23 left (59%) 16 right (41%) | 0.70 | Â | |
Herniated intervertebral disc space (n.) | 80 1-disc space (86%) 10 2-disc spaces (10.8%) 3 3-disc spaces (3.2%) | 39 1-disc space (100%) 0 2-disc spaces (0%) 0 3-disc spaces (0%) | 0.01 | Â | |
Type of surgery | Thoracolumbar (n. of dogs) | 62 (66.7%) | 21 (53.8%) | 0.17 | Â |
Lumbar (n. of dogs) | 31 (33.3%) | 18 (46.1%) | Â | ||
Disc fenestration (n.) | 91 (97.8%) | 36 (92.3%) | 0.15 | Â | |
Number of discs fenestrated | 3 (1–5) | 4 (1–6) | < 0.0001 |  | |
Surgical time (min) | 70 (30–150) | 65 (40–110) | 0.17 |  | |
Anaesthesia time (min) | 161 ± 43 | 140 ± 31 | 0.01 |  |