Table 2 Comparison of the tip position of the catheter in the superior vena cava length, the catheter measured length and the actual catheter placement length between the two groups (x ± s, cm)
Group | n | Superior vena cava length | Catheter measured length | Actual catheter placement length |
|---|---|---|---|---|
ECG group | 218 | 7.48 ± 1.02 | 32.12 ± 3.28 | 32.59 ± 3.18 |
Chest CT group | 218 | 7.59 ± 0.99 | 32.01 ± 2.98 | 32.31 ± 0.76 |
t | − 1.143 | 0.366 | 1.137 | |
P | 0.254 | 0.715 | 0.256 |