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Prevention of Rebound Pain After Orthopaedic Surgery With Peripheral Nerve Block (REBOUND)_part A (REBOUND)

2026년 6월 19일 업데이트: Eric Albrecht, Centre Hospitalier Universitaire Vaudois

Prevention of Rebound Pain After Orthopaedic Surgery With Peripheral Nerve Block: a Single-blinded Randomised Controlled Trial

Rebound pain after peripheral nerve blocks reduces the benefits of regional anesthesia and increases opioid consumption. This rebound pain most likely results from suboptimal pain management, as patients receiving a peripheral nerve block are typically not given scheduled opioid doses. Oral Patient Controlled Analgesia (PCA) consists of an oral morphine prescription that allows patients to self-administer doses based on their pain score.

This study will compare patients undergoing elective orthopaedic surgery under general anaesthesia or sedation with a peripheral nerve block, receiving oral morphine PCA either with or without additional scheduled oral morphine doses.

연구 개요

상태

아직 모집하지 않음

정황

개입 / 치료

상세 설명

This study contains two parts, one for the upper limb and one for the lower limb. Each part will be published independently.

This registration concerns the upper limb cohort.

Patients from each cohort (upper limb and lower limb) will be randomized into two groups of 25 patients each, for a total enrollment plan of 50 patients per cohort. After written informed consent, patients will be allocated to one of the two groups according to a computer-generated randomization list.

In the control group, morphine will be administered exclusively on demand via oral PCA,based on pain intensity assessed using a numeric rating scale (VAS > 4). For oral PCA, one10 mg morphine tablet is placed on the patient's bedside table by the nursing staff. When the patients experience pain, they may take the tablet autonomously and subsequently inform the nurse, who then prepares and places a new tablet at bedside for the next potential pain episode. No scheduled or prophylactic opioid administration will be provided in this group. The maximal allowed dose through oral PCA will be 6 tablets (10mg each) per 24-hour period.

In the intervention group, morphine will be administered at predefined regular intervals, starting immediately in the postoperative period in addition to the availability of oral PCA morphine as mentioned above. Scheduled doses of 20mg slow-release oral morphine will be given at fixed 12 hour intervals. Patients will therefore receive regular morphine to ensure continuous baseline analgesia while still having access to an additional tablet via oral PCA in case of breakthrough pain, following the same nursing procedure as in the control group.

In both groups, standardized multimodal analgesia will be provided

The primary objective of this study is to assess and compare the highest pain score within the first 24 postoperative hours between the two groups using the Visual Analog Scale (VAS). The secondary objective is to assess the effect of the intervention on postoperative pain and analgesic outcomes, including morphine consumption, pain scores, need for additional nerve blocks, incidence of chronic pain, duration of analgesia, postoperative side effects, complications, and hospital length of stay.

연구 유형

중재적

등록 (추정된)

100

단계

  • 해당 없음

연락처 및 위치

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연구 연락처

연구 연락처 백업

연구 장소

      • Lausanne, 스위스, 1000
        • CHUV, Centre Hospitalier Vaudois
        • 연락하다:
        • 연락하다:

참여기준

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자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • Patients scheduled for elective orthopaedic surgery on the upper limb
  • Patients scheduled for elective orthopaedic surgery on the lower limb.
  • Score ASA I-III; Patients aged over 18 years; Signed informed consent.
  • Surgery under general anaesthesia or under sedation

Exclusion Criteria:

  • Refusal or inability to understand the informed consent
  • Allergy to any of the following medications: ropivacaine, paracetamol, ibuprofen, ketorolac, morphine,sufentanil, ondansetron, or dexamethasone
  • Patients with long term opioid treatment
  • Bleeding diathesis
  • Neurological disorders of the operated limb
  • Known renal insufficiency (eGFR <30 mL/min)
  • Known hepatic insufficiency (Child-Pugh class B or C);
  • Pregnant or breastfeeding women;
  • Alcohol dependence syndrome;
  • Patients under spinal anaesthesia;
  • Patients undergoing amputation procedures

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 병렬 할당
  • 마스킹: 더블

무기와 개입

참가자 그룹 / 팔
개입 / 치료
실험적: Scheduled group
Oral morphine administered at predefined regular intervals starting immediately after surgery, with additional access to oral PCA.
morphine will be administered according to a scheduled regimen (20mg slow-release oral morphine at fixed 12-hour intervals), with additional oral PCA on demand for breakthrough pain (VAS > 4), following the same bedside tablet procedure as in the control group. The maximum allowed dose through oral PCA will be 6 tablets (10mg each) per 24-hour period.
다른 이름들:
  • Sevredol 10mg + slow-release oral morphine 20mg
활성 비교기: On-demand group
Oral morphine administered on demand via PCA.
Morphine will be administered according to a scheduled regimen (20mg slow release oral morphine at fixed 12-hour intervals), with additional oral PCA on demand for breakthrough pain (VAS > 4), following the same bedside tablet procedure as in the control group. The maximum allowed dose through oral PCA will be 6 tablets (10mg each) per 24-hour period.
다른 이름들:
  • Sevredol 10mg

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Worst pain score during the first 24 hours after surgery
기간: 24 hours postoperatively
Highest postoperative pain score during the first 24 hours after surgery, measured using a 0-10 Visual Analog Scale (VAS), where 0 indicates no pain and 10 indicates the worst pain imaginable
24 hours postoperatively

2차 결과 측정

결과 측정
측정값 설명
기간
Minimal pain score during the first 12 hours after surgery
기간: 12 hours postoperatively
Lowest postoperative pain score during the first 12 hours after surgery, measured using a 0-10 Visual Analog Scale (VAS), where 0 indicates no pain and 10 indicates the worst pain imaginable
12 hours postoperatively
Rebound pain score measured using the Visual Analog Scale (VAS)
기간: From surgery until 24 hours postoperatively
Rebound pain score calculated as the difference between the highest postoperative pain score within the first 24 hours after surgery and the lowest postoperative pain score within the first 12 hours after surgery. Pain intensity is assessed using a Visual Analog Scale (VAS) ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst pain imaginable. Higher rebound pain scores indicate greater pain rebound.
From surgery until 24 hours postoperatively
Rest and dynamic pain scores
기간: At 2, 12, 24, 36, 48, 60, and 72 hours after surgery
Rest and dynamic pain scores, measured using a 0-10 Visual Analogue Scale (VAS), where 0 indicates no pain and 10 indicates the worst pain imaginable.
At 2, 12, 24, 36, 48, 60, and 72 hours after surgery
Incidence of severe pain
기간: From surgery through 3 months after surgery
Pain evaluated at >7/10 (VAS), measured using a 0-10 Visual Analogue Scale (VAS), where 0 indicates no pain and 10 indicates the worst pain imaginable.
From surgery through 3 months after surgery
Persistence of pain
기간: During the follow-up period from discharge till 4 weeks and 3 months
Incidence of persistent pain at 4 weeks and chronic pain at 3 months
During the follow-up period from discharge till 4 weeks and 3 months
Morphine consumption in the recovery room
기간: from admission until discharge from the recovery room, up to 2 hours
consumption in mg
from admission until discharge from the recovery room, up to 2 hours
PCA administered morphine consumption at day 1, 2 and 3
기간: Day 1, 2 and 3 postoperatively
Consumption in mg administered by PCA
Day 1, 2 and 3 postoperatively
Total administered morphine consumption at day 1, 2, and 3
기간: Day 1, 2 and 3 postoperatively
Total consumption in mg
Day 1, 2 and 3 postoperatively
Incidence of postoperative nausea and vomiting
기간: At 2 hours, day 1, day 2 and day 3 postoperatively
Presence of nausea or vomiting in the postoperative period
At 2 hours, day 1, day 2 and day 3 postoperatively
Incidence of pruritus
기간: At 2 hours, day 1, day 2 and day 3 postoperatively
Presence of pruritus in the postoperative period
At 2 hours, day 1, day 2 and day 3 postoperatively
Incidence of urinary retention requiring bladder catheterisation
기간: At 2 hours, day 1, day 2 and day 3 postoperatively
Urinary retention requiring catheterisation
At 2 hours, day 1, day 2 and day 3 postoperatively
Hospital length of stay
기간: At the time of hospital discharge (typically within 5 days, according to our hospital standard practice)
Duration of hospitalization, measured as the number of days from surgery to hospital discharge. Higher values indicate longer hospital stays.
At the time of hospital discharge (typically within 5 days, according to our hospital standard practice)
Requirement for a new peripheral nerve block
기간: On postoperative day 1, 2 and 3
Requirement for a new peripheral nerve block
On postoperative day 1, 2 and 3
Duration of analgesia
기간: From the time the block is performed up to 36 hours after surgery
Time between block performance and the first dose of morphine
From the time the block is performed up to 36 hours after surgery

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일반 간행물

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (추정된)

2026년 6월 1일

기본 완료 (추정된)

2027년 9월 1일

연구 완료 (추정된)

2027년 9월 1일

연구 등록 날짜

최초 제출

2026년 6월 3일

QC 기준을 충족하는 최초 제출

2026년 6월 19일

처음 게시됨 (실제)

2026년 6월 24일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 6월 24일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 6월 19일

마지막으로 확인됨

2026년 6월 1일

추가 정보

이 연구와 관련된 용어

기타 연구 ID 번호

  • 2026-00307_a

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