TPVB | ESPB | P value*† | |

Sample size, n | 40 | 41 | |

Median amount of postoperative rescue fentanyl uses (IQR) in μg/kg | |||

0–24 hours | 6 (3–7.8) | 6 (4.5–8.6) | 0.33 |

24–48 hours | 1 (0–2.5) | 1.5 (0–3.1) | 0.43 |

Mean number of anesthetized dermatomes (SD) after initiating the infusion | |||

Paraspinal | 0.87 | ||

6 hours | 3.8 (1.5) | 4.1 (1.5) | |

20 hours | 4.1 (1.4) | 3.8 (1.5) | |

Anterior axillary | 0.79 | ||

6 hours | 4.4 (1.3) | 3.9 (1.6) | |

20 hours | 4.1 (1.1) | 3.3 (1.2) | |

Midclavicular | 0.06 | ||

6 hours | 4.2 (1.1) | 3.3 (1.2) | |

20 hours | 4.2 (1.2) | 3.4 (1.1) | |

Parasternal | <0.0001 | ||

6 hours | 3.1 (1.3) | 0.3 (0.4) | |

20 hours | 3.2 (1.4) | 0.6 (0.6) | |

PONV scores, n (%) | 0.08 | ||

0 | 32 (80) | 25 (61) | |

1 | 4 (10) | 11 (26.8) | |

2 | 3 (7.5) | 2 (4.9) | |

3 | 1 (2.5) | 3 (7.3) | |

4 | 0 (0) | 0 (0) | |

Number of additional analgesics use, n (%) | 0.008 | ||

0 time | 27 (57.5) | 15 (36.6) | |

1 time | 9 (22.5) | 18 (43.9) | |

2 times | 4 (10) | 8 (19.5) |

PONV was assessed using a five-point numerical scale (0=no symptom, 1=scarcely, 2=usually, 3=most of the time, 4=all the time).

*P value compares the TPVB group and the ESPB group.

†Amount of rescue fentanyl, PONV scores and additional analgesics use were analyzed using Wilcoxon rank-sum test, and number of anesthetized dermatomes was analyzed using repeated-measures two-factor ANOVA.

ANOVA, analysis of variance; ESPB, erector spinae plane block; PONV, postoperative nausea and vomiting; TPVB, thoracic paravertebral block.