Table 2 Clinical parameters before venipuncture
At randomization | Proximal group (n = 99) | Distal group (n = 99) | P value |
|---|---|---|---|
Heart rate (bpm) | 90 (84, 100) | 91 (84, 102) | 0.80 |
Mean arterial pressure (mmHg) | 75 (72, 79) | 76 (72, 83) | 0.47 |
Respiratory rate (cycle/min) | 15 (15,1 5) | 15 (15, 15) | 0.63 |
CVP (mm Hg) | 12 (10, 14) | 12 (10, 14) | 0.75 |
Need for mechanical ventilation (MV), n (%) | 89 (90.0) | 87 (87.9) | 0.82 |
Side of catheterization (right), n (%) | 83 (83.8) | 79 (79.8) | 0.58 |
Days after surgery, days | 6 (4, 8) | 6 (5, 8) | 0.60 |
Tidal volume (mL/kg of PBW) | 7.57 ± 1.32 | 7.73 ± 1.15 | 0.36 |
PEEP (cm H2O) | 5 (5, 5) | 5 (5, 5) | 0.34 |
Vasopressor administration, n (%) | 73 (73.7) | 66 (66.7) | 0.35 |
Inotropic administration, n (%) | 66 (66.7) | 63 (63.6) | 0.77 |
Axillary vein depth (cm) | 1.96 ± 0.51 | 2.45 ± 0.57 | < 0.001 |
Axillary vein diameter (cm) | 0.92 (0.77, 1.10) | 0.75 (0.65, 0.87) | < 0.001 |
PT (s) | 19.2 (14.5, 23.7) | 19.4 (15.2, 26.6) | 0.42 |
INR | 1.73 (1.38, 2.12) | 1.74 (1.39, 2.46) | 0.37 |
Platelets (× 109/L) | 118 (86, 175) | 128 (82, 184) | 0.97 |