Table 2. Comparison of haemodynamic variables (median and range) in dogs before and after a mini-fluid bolus (MFB) with 4 ml/kg Hartmann’s solution administered intravenously in 22 dogs.
| Group | Before fluid challenge |
After fluid challenge |
||||
|---|---|---|---|---|---|---|
| R | NR | P-valuea) | R | NR | P-valuea) | |
| Dogs (No.) | 10 | 12 | 10 | 12 | ||
| HR (beats/min) | 135 (110–180) | 108 (59–190) | 0.03 | 127 (83–182) | 98 (57–151) | 0.05 |
| SAP (mmHg) | 141 (85–175) | 152 (70–163) | 0.563 | 140 (117–170) | 148 (102–206) | 0.88 |
| MAP (mmHg) | 103 (70–159) | 110 (74–132) | 0.315 | 105 (75–113) | 110 (77–145) | 0.575 |
| VTI (cm) | 8.5 (3.4–12.7) | 12.1 (8–16.3) | 0.005 | 11.8 (6–18) | 12.3 (9–17) | 0.878 |
| CVC/Ao | 0.59 (0.38–0.83) | 0.90 (0.5–1.46) | 0.001 | 0.83 (0.46–1.24) | 0.97 (0.51–1.7) | 0.044 |
| cCVC | 33 (11–57) | 33 (10–71) | 0.771 | 32 (18–37) | 30 (6–77) | 0.871 |
Data are presented as median (range). a) Two Tailed probability Mann–Whitney U test. Responders (R), Non-responders (NR). Heart rate (HR), systolic arterial pressure (SAP), mean arterial pressure (MAP), velocity time integral (VTI), caudal vena cava diameter to abdominal aortic diameter ratio (CVC/Ao), collapsibility of the caudal vena cava (cCVC).