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Efficacy of Botulinum Toxin Versus Placebo on Pain and Health Related Quality of Life of Patients With Piriformis Muscle Syndrome (PiriTox)

2026년 5월 29일 업데이트: Centre Hospitalier Universitaire de Nīmes

A Phase IIb, Randomized, Double-blind, Multicenter Study Evaluating the Efficacy of Botulinum Toxin Versus Placebo on Pain and Health Related Quality of Life of Patients With Piriformis Muscle Syndrome

Piriformis muscle syndrome (PMS) is characterized by symptoms caused by compression or irritation of the sciatic nerve by the piriformis muscle as it exits the sciatic notch. PMS commonly evokes the symptoms of sciatica and is likely underdisagnosed. Patients who experience pain related to piriformis syndrome will complain of aggravated pain after prolonged periods of sitting or upon rising from a seated position. Around 98% of patients evoke positional buttock pain, especially during prolonged sitting (car journeys, for example). This is less true for sciatic pain radiation, which is still found in 63% of cases, systematically associated with the notion of buttock pain. Treatments for PMS aim to reduce or eliminate sciatic pain and also control buttock pain. Reducing these pains can improve the physical condition and emotional state of the patient. Several approaches have been proposed including physical therapy (massage-physiotherapy, self-rehabilitation techniques) combined with the use of anti-inflammatory drugs, analgesics and muscle relaxants to reduce inflammation, spasm and pain. Many patients do not respond to conventional care. Surgery may be considered only in those cases who do not improve with conservative therapy or injections. However, decompressive surgery is an invasive treatment, indicated in case of complete failure of all medical strategies, with physical and functional consequences. In recent years, several published studies showed the use of botulinum toxin (BT) injection as a new therapeutic option to reduce buttock and sciatic pain induced by PMS. The study team previously observed the efficacy of BT/A1 administration into the piriformis muscle in patients who were previously treated with medication and rehabilitation protocols with no pain improvement. Pain relief was considered as "very good" or "good" for 77% of the patients, "average" for 7.4% and "poor" for 15.6%. No adverse events were reported. More recently, Fishman and colleagues reported the results of a randomized, double-blind, controlled study including 56 patients and comparing physical therapy, incobotulinum toxin A and placebo. Data are sparse concerning BT injection for PMS and no multicenter randomized clinical trial have been performed. Two out of three randomized trials (Fishman 2004, 2017) are based on highly selected patients (3 standard deviations or more beyond on the prolongation of the posterior tibial or fibular nerve H-reflex in FAIR test). Therefore, BT efficacy may be overestimated and remains to be evaluated among unselected PMS patients, regardless of analgesic treatments or physical therapy. Finally, no randomized studies have reported the heatlh-related quality of life of PMS patients.

연구 개요

상태

아직 모집하지 않음

정황

개입 / 치료

연구 유형

중재적

등록 (추정된)

108

단계

  • 2 단계

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 연락처

연구 장소

  • 프랑스
      • Besançon, 프랑스
      • Bordeaux, 프랑스
      • Nantes, 프랑스
      • Paris, 프랑스
        • Hôpital Universitaire Paris Cochin
        • 연락하다:
      • Strasbourg, 프랑스
        • Institut Universitaire de Réadaptation Clémenceau
        • 연락하다:
      • Toulouse, 프랑스
        • CHU de Toulouse
    • Gard
      • Nîmes, Gard, 프랑스, 30029
        • Centre Hospitalier Universitaire de Nîmes
        • 연락하다:

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • Objective clinical diagnosis of unilateral piriformis syndrome for at least 3 months (as assessed by Clinical Scoring System for the Diagnosis of Piriformis Muscle Syndrome: score of 8 or greater
  • Absence of herniated lumbar disc which can explain radiating pain (MRI or computed tomography (CT) of the lumbar spine)
  • Patients not responding to conventional care (physiotherapy, muscle relaxants, analgesics)
  • Baseline sciatic pain intensity of at least 4 points on visual analog scale
  • Provision of written informed consent
  • Patients affiliated to social security system (health insurance coverage).

Exclusion Criteria:

  • Bilateral piriformis muscle syndrome.
  • History of piriformis syndrome surgery.
  • History of botulinum toxin administration.
  • Any treatment (general or local) likely to interfere with botulinum toxin or evaluation of the primary endpoint (Corticosteroids, aminoglycosides).
  • Corticosteroids in the past 3 weeks.
  • Signs of severe fibrosis (on MRI or CT) of the piriformis muscle.
  • Other causes of sciatic pain (lumbar root compression, inflammatory, infectious or neoplasic pelvic disease, particularly for inflammatory sacroiliac pain).
  • Hip prosthesis on the same side as piriformis syndrome; knee prosthesis is tolerated.
  • Contraindication to BT injection:
  • History of intolerance, hypersensitivity or known allergy to any botulinum toxin product or excipients;
  • Patients with myasthenia gravis or other diseases of the neuromuscular junction;
  • Patients with Lambert-Eaton Syndrome;
  • Patients with neurological disorders such as dysphagia, swallowing disorders or aspiration pneumonia;
  • Current infection at the proposed injection site;
  • Long-term anticoagulant therapy ;
  • Antibiotics and vaccination are prohibited for 15 days before and after BT injection
  • Pregnant or breastfeeding women. Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant must use an effective method of contraception (oral contraceptives, contraceptive injections, intrauterine devices, method of double-barrier contraceptive patches). The contraception should be maintained throughout the study.
  • Patients unable to complete the patient diary.
  • Inability to understand the reasons for the study; psychiatric disorders judged by the investigator to be incompatible with inclusion in the study.
  • Patients with legal disability or limited legal capacity.
  • Patients judged as noncompliant.

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: 삼루타

무기와 개입

참가자 그룹 / 팔
개입 / 치료
실험적: 보툴리눔 독소 주사
의약품: Botulinum Toxin - A injections
Incobotulinumtoxin type A (200 U in 2 mL of preservative-free normal saline) will be injected in equally divided doses (1mL; 100 U for incobotulinumtoxin A) into 2 locations in the affected buttock region
위약 비교기: 플라시보 주사
의약품: Placebo
Placebo (normal saline solution and excipients described in Xeomin) will be injected in equally divided doses (1mL) into 2 locations in the affected buttock region

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Change in sciatic pain
기간: From baseline to Week 6
Measured on a 0 (no pain) to 10 (worst pain) visual analog scale
From baseline to Week 6

2차 결과 측정

결과 측정
측정값 설명
기간
Change in buttock pain intensity
기간: From baseline to Week 6
Measured on a 0 (no pain) to 10 (worst pain) visual analog scale
From baseline to Week 6
Health-related quality of life
기간: Baseline
EuroQol-5 Dimension questionnaire measuring five items representing the five dimensions, and a visual analog scale graduated from 0 to 100 (100 referring to the "best possible state of health"). For each dimension, patients indicate their current state of health to generated a 5-digit number describing the health status (e.g., health status "11111" indicates the absence of problems in each dimension)
Baseline
Health-related quality of life
기간: Week 6
EuroQol-5 Dimension questionnaire measuring five items representing the five dimensions, and a visual analog scale graduated from 0 to 100 (100 referring to the "best possible state of health"). For each dimension, patients indicate their current state of health to generated a 5-digit number describing the health status (e.g., health status "11111" indicates the absence of problems in each dimension)
Week 6
Health-related quality of life
기간: Week 12
EuroQol-5 Dimension questionnaire measuring five items representing the five dimensions, and a visual analog scale graduated from 0 to 100 (100 referring to the "best possible state of health"). For each dimension, patients indicate their current state of health to generated a 5-digit number describing the health status (e.g., health status "11111" indicates the absence of problems in each dimension)
Week 12
Health-related quality of life
기간: Week 18
EuroQol-5 Dimension questionnaire measuring five items representing the five dimensions, and a visual analog scale graduated from 0 to 100 (100 referring to the "best possible state of health"). For each dimension, patients indicate their current state of health to generated a 5-digit number describing the health status (e.g., health status "11111" indicates the absence of problems in each dimension)
Week 18
Health-related quality of life
기간: Week 24
EuroQol-5 Dimension questionnaire measuring five items representing the five dimensions, and a visual analog scale graduated from 0 to 100 (100 referring to the "best possible state of health"). For each dimension, patients indicate their current state of health to generated a 5-digit number describing the health status (e.g., health status "11111" indicates the absence of problems in each dimension)
Week 24
Sciatic pain intensity
기간: Baseline
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Baseline
Sciatic pain intensity
기간: Week 3
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 3
Sciatic pain intensity
기간: Week 6
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 6
Sciatic pain intensity
기간: Week 9
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 9
Sciatic pain intensity
기간: Week 12
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 12
Sciatic pain intensity
기간: Week 15
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 15
Sciatic pain intensity
기간: Week 18
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 18
Sciatic pain intensity
기간: Week 21
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 21
Sciatic pain intensity
기간: Week 24
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 24
Buttock pain intensity
기간: Baseline
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Baseline
Buttock pain intensity
기간: Week 3
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 3
Buttock pain intensity
기간: Week 6
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 6
Buttock pain intensity
기간: Week 9
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 9
Buttock pain intensity
기간: Week 12
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 12
Buttock pain intensity
기간: Week 15
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 15
Buttock pain intensity
기간: Week 18
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 18
Buttock pain intensity
기간: Week 21
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 21
Buttock pain intensity
기간: Week 24
Assessed on Visual Analog Scale value (0 = no pain, 10 = worst pain)
Week 24
Physical functioning
기간: Baseline
Brief Pain Inventory Short Form; 9-item questionnaire, where Worst Pain Score: 1 - 4 = Mild Pain; Worst Pain Score: 5 - 6 = Moderate Pain; Worst Pain Score: 7 - 10 = Severe Pain
Baseline
Physical functioning
기간: Week 6
Brief Pain Inventory Short Form; 9-item questionnaire, where Worst Pain Score: 1 - 4 = Mild Pain; Worst Pain Score: 5 - 6 = Moderate Pain; Worst Pain Score: 7 - 10 = Severe Pain
Week 6
Physical functioning
기간: Week 12
Brief Pain Inventory Short Form; 9-item questionnaire, where Worst Pain Score: 1 - 4 = Mild Pain; Worst Pain Score: 5 - 6 = Moderate Pain; Worst Pain Score: 7 - 10 = Severe Pain
Week 12
Physical functioning
기간: Week 18
Brief Pain Inventory Short Form; 9-item questionnaire, where Worst Pain Score: 1 - 4 = Mild Pain; Worst Pain Score: 5 - 6 = Moderate Pain; Worst Pain Score: 7 - 10 = Severe Pain
Week 18
Physical functioning
기간: Week 24
Brief Pain Inventory Short Form; 9-item questionnaire, where Worst Pain Score: 1 - 4 = Mild Pain; Worst Pain Score: 5 - 6 = Moderate Pain; Worst Pain Score: 7 - 10 = Severe Pain
Week 24
Perceived change in condition in response to therapy
기간: Baseline
Patient Global Impression of Improvement (PGI-I)
Baseline
Perceived change in condition in response to therapy
기간: Week 6
Patient Global Impression of Improvement (PGI-I)
Week 6
Perceived change in condition in response to therapy
기간: Week 12
Patient Global Impression of Improvement (PGI-I)
Week 12
Perceived change in condition in response to therapy
기간: Week 18
Patient Global Impression of Improvement (PGI-I)
Week 18
Perceived change in condition in response to therapy
기간: Week 24
Patient Global Impression of Improvement (PGI-I)
Week 24
Emotional distress
기간: Baseline
Hospital Anxiety and Depression Scale (HADS); 14 items, with responses scored on a scale of 0-3 (3 indicates higher symptom frequencies). Subscales (anxiety and depression) range from 0 to 21 whereby: normal 0-7, mild 8-10, moderate 11-14, and severe 15-21.
Baseline
Emotional distress
기간: Week 6
Hospital Anxiety and Depression Scale (HADS); 14 items, with responses scored on a scale of 0-3 (3 indicates higher symptom frequencies). Subscales (anxiety and depression) range from 0 to 21 whereby: normal 0-7, mild 8-10, moderate 11-14, and severe 15-21.
Week 6
Emotional distress
기간: Week 12
Hospital Anxiety and Depression Scale (HADS); 14 items, with responses scored on a scale of 0-3 (3 indicates higher symptom frequencies). Subscales (anxiety and depression) range from 0 to 21 whereby: normal 0-7, mild 8-10, moderate 11-14, and severe 15-21.
Week 12
Emotional distress
기간: Week 18
Hospital Anxiety and Depression Scale (HADS); 14 items, with responses scored on a scale of 0-3 (3 indicates higher symptom frequencies). Subscales (anxiety and depression) range from 0 to 21 whereby: normal 0-7, mild 8-10, moderate 11-14, and severe 15-21.
Week 18
Emotional distress
기간: Week 24
Hospital Anxiety and Depression Scale (HADS); 14 items, with responses scored on a scale of 0-3 (3 indicates higher symptom frequencies). Subscales (anxiety and depression) range from 0 to 21 whereby: normal 0-7, mild 8-10, moderate 11-14, and severe 15-21.
Week 24
Disability for low back pain
기간: Baseline
Oswestry Disability Index (ODI): range 0 to 100. Zero is equated with no disability and 100 is the maximum disability possible.
Baseline
Disability for low back pain
기간: Week 6
Oswestry Disability Index (ODI): range 0 to 100. Zero is equated with no disability and 100 is the maximum disability possible.
Week 6
Disability for low back pain
기간: Week 12
Oswestry Disability Index (ODI): range 0 to 100. Zero is equated with no disability and 100 is the maximum disability possible.
Week 12
Disability for low back pain
기간: Week 18
Oswestry Disability Index (ODI): range 0 to 100. Zero is equated with no disability and 100 is the maximum disability possible.
Week 18
Disability for low back pain
기간: Week 24
Oswestry Disability Index (ODI): range 0 to 100. Zero is equated with no disability and 100 is the maximum disability possible.
Week 24
Tolerance of the sitting position
기간: Baseline
Time between the beginning of the sitting position and the onset or worsening of the pain
Baseline
Tolerance of the sitting position
기간: Week 6
Time between the beginning of the sitting position and the onset or worsening of the pain
Week 6
Tolerance of the sitting position
기간: Week 12
Time between the beginning of the sitting position and the onset or worsening of the pain
Week 12
Tolerance of the sitting position
기간: Week 18
Time between the beginning of the sitting position and the onset or worsening of the pain
Week 18
Tolerance of the sitting position
기간: Week 24
Time between the beginning of the sitting position and the onset or worsening of the pain
Week 24
Consumption of painkillers
기간: Week 24
Number of level 1 to 3 analgesics, non-steroidal anti-inflammatory drugs and muscle relaxants
Week 24
Number of patients requiring a second injection botulinum toxin in each arm
기간: Week 12
Number
Week 12
Side effects of injection
기간: Week 24
Side effects of the injection or attributable to the study drug
Week 24

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Centre Hospitalier Universitaire de Nīmes

수사관

  • 수석 연구원: Arnaud Dupeyron, CHU Nîmes

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 7월 1일

기본 완료 (추정된)

2029년 1월 1일

연구 완료 (추정된)

2029년 1월 1일

연구 등록 날짜

최초 제출

2026년 5월 29일

QC 기준을 충족하는 최초 제출

2026년 5월 29일

처음 게시됨 (실제)

2026년 6월 3일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 6월 3일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 5월 29일

마지막으로 확인됨

2026년 5월 1일

추가 정보

이 연구와 관련된 용어

추가 관련 MeSH 약관

기타 연구 ID 번호

  • PHRCN/2019/AD-1
  • 2024-517948-66-00 (씨티스)

약물 및 장치 정보, 연구 문서

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아니

미국 FDA 규제 기기 제품 연구

아니

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