Effect of Liposomal Bupivacaine on Rebound Pain After Peripheral Nerve Block in Orthopedic Surgery.
Ориентир для пациента и семьи
Простыми словами
Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.
- Что изучают
- В протоколе указаны: liposomal bupivacaine, Normal Saline.
- Кому может быть актуально
- Состояния в реестре: Acute Pain, Orthopaedic Surgery. Базовые параметры: 18 лет — 65 лет · Все.
- Что важно проверить
- Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
- Где проводится
- Китай
- Следующий шаг
- Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →
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Официальное название
Liposomal Bupivacaine Combined With Plain Bupivacaine for Peripheral Nerve Block to Reduce Rebound Pain After Orthopedic Extremity Surgery: A Multicenter Randomized Controlled Trial
Обзор
This study will prospectively compare the preventive effect of liposomal bupivacaine combined with plain bupivacaine versus plain bupivacaine alone on rebound pain after nerve block in patients undergoing orthopedic extremity surgery. The primary aim is to assess whether the combination reduces the incidence or severity of rebound pain (i.e., more effectively covers the postoperative inflammatory peak on days 2-3 and provides a smoother regression curve of sensory blockade). Secondary aims include evaluation of upper limb functional scores, occurrence of chronic pain, and health-related quality of life. All aims will be assessed over 72 hours or the duration of hospitalization if shorter.
Подробное описание
Rebound pain (RP) after nerve block occurs in up to 50% of patients, presenting as acute severe pain that impairs recovery and is associated with chronic pain. Risk factors include female sex, younger age, orthopedic surgery, and lack of perioperative dexamethasone use. Even with dexamethasone, approximately one-third of patients show a poor response, suggesting the limitations of a single-agent anti-inflammatory strategy.
RP is associated with an imbalance in perioperative inflammation management. The postoperative inflammatory peak occurs on days 2-3 and is accompanied by central sensitization, with pain rebounding after block resolution. Prolonged sensory blockade may reduce RP; however, continuous nerve block techniques are complex and associated with higher complication rates, which limits their clinical application.
Liposomal bupivacaine provides up to 72 hours of analgesia with a single injection, prolongs sensory blockade, and may theoretically reduce RP. Nevertheless, existing evidence is inconsistent: some studies support its efficacy, whereas others fail to demonstrate clinically important differences. Moreover, one animal study suggests that it may only delay, rather than eliminate, RP, albeit with limited evidence quality. This study aims to evaluate the preventive effect of liposomal bupivacaine combined with plain bupivacaine on RP after nerve block in orthopedic extremity surgery, thereby providing evidence to inform clinical strategies.
Вмешательства
- Препарат liposomal bupivacaine
Prepare a local anesthetic by combining liposomal bupivacaine (133 mg/10 mL) and bupivacaine hydrochloride (75 mg/10 mL) in a 2:1 volume ratio. - Препарат Normal Saline
Prepare a local anesthetic by combining normal saline (10 mL) and bupivacaine hydrochloride (75 mg/10 mL) in a 2:1 volume ratio.
Первичные конечные точки
- incidence of rebound pain [Срок оценки: the first 24 hours after surgery]
Вторичные конечные точки (2)
- Area under the pain intensity-time curve [Срок оценки: up to 72 hours]
- Total postoperative opioid consumption [Срок оценки: 24, 48, 72 hours]
Критерии участия
Критерии включения
- 18-65 years old;
- ASA Physical Status 1-3;
- Scheduled for elective unilateral orthopedic surgery of the upper or lower extremity.
Критерии исключения
- Women who are pregnant or breastfeeding;
- Bupivacaine sensitivity or known allergy;
- Contraindication for nerve blocks;
- Enrollment in another clinical trial that could confound pain evaluation;
- Other conditions that preclude study participation.
Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.
Здоровые добровольцы: Нет
Дизайн исследования
- Распределение
- Рандомизированное
- Модель
- Параллельные группы
- Маскирование
- Тройное слепое
- Основная цель
- Профилактика
Центры проведения
Китай · 1 центр
- Shanghai sixth people's hospital — Шанхай
Идентификаторы
NCT: NCT07606911 · BLOC trial · Grant No. 20240814 · Grant No. 82525022