Table 2 Visual analogue scale (VAS) scores and postoperative adverse reactions

Implantation of balloon catheter into uterine cavity

1.89 ± 0.86

1.99 ± 1.11

0.161

Tubal injection of Microbubble contrast agent

2.27 ± 1.10

2.85 ± 1.12

0.485

Half an hour after operation

0.17 ± 0.44

0.21 ± 0.55

0.248

Mild vaso-vagal reactions (pallor, nausea, sudation, hypotension, bradycardia)

1/82 (1.23%)

5/111 (4.50%)

0.194

Implantation of balloon catheter into uterine cavity

0/82 (0%)

3/111 (2.70%)

0.134

Tubal injection of Microbubble contrast agent

1/82 (1.23%)

0/111 (0%)

0.243

Half an hour after operation

0/82 (0%)

2/111 (1.80%)

0.222

Severe vaso-vagal reactions (vomiting,confusion, syncope)

1/82 (1.23%)

2/111 (1.80%)

0.747

Implantation of balloon catheter into uterine cavity

0/82 (0%)

1/111 (0.90%)

0.389

postoperative hemorrhage

50/82 (60.98%)

58/111 (52.25%)

0.228