TABLE 1.
Characteristics of patients and ultrasound measurements
| Factor | Central venous pressure ≤ 8 mmHg (n = 29) | Central venous pressure > 8 mmHg (n = 12) | P-value* | |
|---|---|---|---|---|
| Demographic characteristics | ||||
| Age (years) | 75 70–83) | 75 (70–84) | 0.45 | |
| Male, n (%) | 16 (56) | 7 (58) | 0.78 | |
| Body mass index, kg m–2 | 28 (24–31) | 27 (24–30) | 0.56 | |
| Clinical data | ||||
| SAPS II score | 36 (28–44) | 38 (29–46) | 0.10 | |
| MAP, mmHg | 78 (70–87) | 81 (71–90) | 0.18 | |
| LVEF, % | 53 (50–60) | 51 (45–55) | 0.009 | |
| TAPSE, mm | 25 (23–27) | 25 (25–26) | 0.29 | |
| IAP, mmHg | 13 (12–14) | 13 (12–14) | 0.71 | |
| IJV (right), % | 13 (45) | 7 (58) | 0.51 | |
| IJV (left), % | 18 (62) | 5 (42) | 0.31 | |
| Ultrasound measurements | ||||
| IVCD-max, cm | 2 (1.7–2.4) | 2.1 (1.8–2.4) | 0.12 | |
| AP-IJV diameter, mm | 7.6 (5.8–9.5) | 8.8 (6.5–10) | 0.001 | |
| IJV aspect ratio | 0.59 (0.41–0.73) | 0.65 (0.47–0.76) | 0.007 | |
| IVC collapsibility index | 32 (20–42) | 30 (19–38) | 0.30 | |
SAPS – Simplified Acute Physiology Score, MAP – mean arterial pressure, LVEF – left ventricular ejection fraction,
TAPSE – tricuspid annular plane systolic excursion, IAP – intra-abdominal pressure, IVCD-max – maximum anteriorposterior dimension at the end-expiration, AP-IJV diameter – internal jugular vein antero-posterior diameter,
T-IJV – internal jugular vein transverse diameter P* was calculated using the Mann-Whitney test. For all data, we considered the median and the interquartile range (25th percentile – 75th percentile).