|
Characteristics of the total study population |
||
| Characteristics |
Ultrasound group (n = 450) |
Landmark group (n = 450) |
|
|
||
| Age (years)a |
58.3 ± 10.3 |
59 ± 9.5 |
| Gender (male/female ratio)a |
0.56 ± 0.4 |
0.6 ± 0.4 |
| Side of catheterisation (left/right) |
222/228 |
218/232 |
| Body mass index (kg/m2)a |
24.1 ± 5.3 |
23.7 ± 5.9 |
| Prior catheterisation |
85 (18.8%) |
76 (16.8%) |
| Limited sites for access attempts |
51 (11.3%) |
55 (12.2%) |
| Previous difficulties during catheterisation |
44 (9.7%) |
40 (8.8%) |
| Previous mechanical complication |
18 (4%) |
20 (4.4%) |
| Known vascular abnormality |
4 (0.8%) |
3 (0.6%) |
| Untreated coagulopathy |
25 (5.5%) |
24 (5.3%) |
| Skeletal deformity |
15 (3.3%) |
13 (2.8%) |
| Cannulation during cardiac arrest |
31 (6.8%) |
35 (7.7%) |
|
aValues are presented as mean ± standard deviation. | ||
Karakitsos et al. Critical Care 2006 10:R162 doi:10.1186/cc5101 |
||