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Erector Spinae Block Versus Paravertebral Block on Chronic Pain After Mastectomy

2026年6月1日 更新者：Nancy Abou Nafeh、American University of Beirut Medical Center

The Effect of Erector Spinae Block Versus Paravertebral Block on the Incidence of Chronic Pain After Mastectomy: A Randomized Controlled Trial

The goal of this clinical trial is to learn if the erector spinae block can reduce the incidence of chronic pain compared to the paravertebral block in adult patients undergoing total mastectomy. The study includes patients aged 18 to 80 years scheduled for mastectomy, with or without axillary dissection. The main questions it aims to answer are:

  • Does erector spinae block reduce the incidence of chronic pain at 3 months after mastectomy compared to paravertebral block?
  • Does erector spinae block affect postoperative outcomes such as opioid consumption at 48 hours, pain scores (in PACU, 24 and 48 hours), block performance time, and the incidence of complications, anxiety or depression, and pain intensity at 3 months?

Researchers will compare patients receiving erector spinae block to those receiving paravertebral block to determine if erector spinae block provides equivalent or improved outcomes in terms of chronic pain and perioperative measures.

Participants will:

  • Be randomly assigned to receive either erector spinae block or paravertebral block prior to surgery
  • Undergo total mastectomy (with or without axillary dissection)
  • Have their pain assessed in the PACU and at 24 and 48 hours postoperatively
  • Have opioid consumption measured during the first 48 hours after surgery
  • Be followed up at 3 months to assess chronic pain, pain intensity, and psychological outcomes (anxiety or depression)

調査の概要

状態

募集

条件

介入・治療

詳細な説明

Background: Acute post mastectomy pain is a strong predictor of the development of chronic pain. Paravertebral block (PVB) has been shown to reduce the incidence and severity of acute and chronic pain post mastectomy. Despite the use of ultrasound, the performance of this advanced block requires special skills and training due to the proximity of the injection site to the pleura and the spinal cord. Erector spinae block (ESB), a novel regional anesthesia technique, has been shown to be equivalent to PVB in reducing the incidence and severity of acute post-surgical pain.

Specific aims: The primary objective of this study is to compare the effect of ESB and PVB on the incidence of chronic pain measured 3 months after mastectomy. Secondary objectives include assessment of cumulative opioid consumption at 48 hours post operatively, pain scores in the PACU as well as at 24 and 48 hours, time needed for performing the block, as well as complications, anxiety or depression at 3 months, pain intensity at 3 months. Methods: This prospective randomized clinical trial will be conducted in the operating rooms at AUBMC. 132 (66 in each group) adult patients scheduled to total mastectomy, with or without axillary dissection, and aging between 18 and 80 will be randomly allocated to 2 groups: The erector spinae group or the paravertebral group. Significance: It has not been demonstrated yet that the ESB is equivalent to the more conventional PVB in reducing the incidence of chronic post mastectomy pain. This study will compare the effect of ESB to PVB in reducing the incidence of chronic pain, which will improve the quality of life of patients undergoing modified radical mastectomy

研究の種類

介入

入学 (推定)

132

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

  • 名前：Nancy Abou Nafeh, MD
  • 電話番号：6820 01350000
  • メール：na181@aub.edu.lb

研究連絡先のバックアップ

研究場所

  • レバノン
      • Beirut、レバノン
        • 募集
        • American University of Beirut Medical Center
        • コンタクト：
          • Nancy Abou Nafeh

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人
  • 高齢者

健康ボランティアの受け入れ

はい

説明

Inclusion Criteria:

  • Adult patients between 18 and 80 years old.
  • Scheduled to total mastectomy with or without axillary dissection
  • Willing to receive regional anesthesia in addition to GA
  • ASA classification 1-3

Exclusion Criteria:

  • Previous thoracic surgery with an incision of >2 cm
  • Patient's refusal
  • Allergy to local anesthetics
  • Pregnant women
  • Any contraindications to thoracic PVB, including intrathoracic infection, infection at the puncture site, cancer invasion of the puncture site, severe spinal deformity, history of spinal surgery, and severe coagulopathy; anticoagulants intake.
  • American Society of Anesthesiologists (ASA) classification of 4 or higher,
  • History of chronic pain or untreated clinical severe depression

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：処理
  • 割り当て：ランダム化
  • 介入モデル：並列代入
  • マスキング：ダブル

武器と介入

参加者グループ / アーム
介入・治療
アクティブコンパレータ：Paravertebral block
Thoracic paravertebral block is performed at the level of T4 or T5 if no axillary procedure is to be performed, and additionally at the level of T2 if axillary procedure is planned. A high-frequency transducer probe connected to an ultrasound (US) machine is positioned in a para-median sagittal plane, approximately 2-2.5 cm lateral to the spinous process at the ipsilateral side of surgery location to localize the transverse process and the paravertebral space. The skin is sterilized and the US probe covered with a sterile cap. A 22-gauge, 100 mm stimuplex nerve block needle is introduced in an in-plane direction. After perforating the costotransverse ligament and confirming negative aspiration of blood, 20ml of a mixture of ropivacaine 0.5% is injected. Anterior displacement of the pleura indicates appropriate spread of local anaesthesia (LA) in the paravertebral space.
薬：Paravertebral block
Thoracic paravertebral block is performed at the level of T4 or T5 if no axillary procedure is to be performed, and additionally at the level of T2 if axillary procedure is planned. A high-frequency transducer probe connected to an ultrasound (US) machine is positioned in a para-median sagittal plane, approximately 2-2.5 cm lateral to the spinous process at the ipsilateral side of surgery location to localize the transverse process and the paravertebral space. The skin is sterilized and the US probe covered with a sterile cap. A 22-gauge, 100 mm stimuplex nerve block needle is introduced in an in-plane direction. After perforating the costotransverse ligament and confirming negative aspiration of blood, 20ml of a mixture of ropivacaine 0.5% is injected. Anterior displacement of the pleura indicates appropriate spread of local anaesthesia (LA) in the paravertebral space.
他の名前：
  • TPVB
実験的：Erector Spinae block
The ESB is performed at the level of T4-T5 if no axillary procedure is to be performed, and additionally at the level of T2 (5ml) if axillary procedure is planned. A transducer probe is positioned in a para-median sagittal plane approximately 3 cm lateral to the spinous process at the ipsilateral side of surgery. Following the same sterilization procedure, the 10 cm stimuplex needle is introduced in an in-plane direction. The transverse process of the vertebrae, trapezius muscle, rhomboid major and erector spinae muscle are visualized, and 25 ml of ropivacaine 0.5% mixture is injected after confirming negative aspiration of blood (lower the concentration not to exceed 2 mg/kg ideal body weight). The LA spread lifts the erector spinae muscle off the bony shadow of the transverse process
薬：Erector Spinae block
The ESB is performed at the level of T4-T5 if no axillary procedure is to be performed, and additionally at the level of T2 (5ml) if axillary procedure is planned. A transducer probe is positioned in a para-median sagittal plane approximately 3 cm lateral to the spinous process at the ipsilateral side of surgery. Following the same sterilization procedure, the 10 cm stimuplex needle is introduced in an in-plane direction. The transverse process of the vertebrae, trapezius muscle, rhomboid major and erector spinae muscle are visualized, and 25 ml of ropivacaine 0.5% mixture is injected after confirming negative aspiration of blood (lower the concentration not to exceed 2 mg/kg ideal body weight). The LA spread lifts the erector spinae muscle off the bony shadow of the transverse process.
他の名前：
  • ESPB

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Chronic pain
時間枠：3 months after mastectomy
Chronic pain measured using NRS scale (0-10) 3 months after mastectomy
3 months after mastectomy

二次結果の測定

結果測定
メジャーの説明
時間枠
Cumulative opioid consumption
時間枠：Amount of opioids used by the patient 48 hours after the procedure
Cumulative opioid consumption
Amount of opioids used by the patient 48 hours after the procedure
Pain score
時間枠：Pain score measured using NRS scale (0-10) on arrival to the PACU,12 hour, 24 hour,and 48 hour after the procedure
Pain score measured using NRS scale (0-10)
Pain score measured using NRS scale (0-10) on arrival to the PACU,12 hour, 24 hour,and 48 hour after the procedure
Time needed for performing the block
時間枠：Time needed for performing the block (Perioperative)
Time needed for performing the block in minutes
Time needed for performing the block (Perioperative)
Complications
時間枠：Incidence of complications (Yes/No) (Perioperative)
Incidence of complications (Yes/No)
Incidence of complications (Yes/No) (Perioperative)
Anxiety or depression
時間枠：Anxiety or depression measured using the Hospital Anxiety and Depression Scale (HADS; range 0-42, with subscales 0-21 each), where higher scores indicate worse anxiety and depression, assessed 3 months after the procedure.
Anxiety or depression measured using HADS
Anxiety or depression measured using the Hospital Anxiety and Depression Scale (HADS; range 0-42, with subscales 0-21 each), where higher scores indicate worse anxiety and depression, assessed 3 months after the procedure.

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

American University of Beirut Medical Center

捜査官

  • 主任研究者：Nancy Abou Nafeh, MD、American University of Beirut Medical Center

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2026年5月19日

一次修了 (推定)

2028年5月1日

研究の完了 (推定)

2028年5月1日

試験登録日

最初に提出

2026年4月20日

QC基準を満たした最初の提出物

2026年4月28日

最初の投稿 (実際)

2026年5月1日

学習記録の更新

投稿された最後の更新 (実際)

2026年6月2日

QC基準を満たした最後の更新が送信されました

2026年6月1日

最終確認日

2026年6月1日

詳しくは

本研究に関する用語

追加の関連 MeSH 用語

その他の研究ID番号

  • BIO-2025-0326

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個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

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いいえ

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いいえ

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