Table 1. Failure was defined as puncture requiring manipulation for 20 min or longer. There was statistical difference among the three methods (P = 0.007; χ2 test). The anterosuperior puncture technique (ASPT) produced a higher success rate than the lateral puncture technique (LPT) and the anteroinferior puncture technique (AIPT) (P = 0.003, 0.02; Fisher's exact test). There was no difference between the LPT and the AIPT (P = 0.83; Fisher's exact test).
| Success | Failure | Total | % success | |
| LPT | 5 | 6 | 11 | 45 |
| ASPT | 13 | 0 | 13 | 100 |
| AIPT | 3 | 3 | 6 | 50 |