Preoperative Botulinum Toxin A to Facilitate Midline Closure in Large Chronic Ventral Hernias (Probhe)
Prehabilitation With Botulinum Toxin A in Complex Hernia: an Italian Prospective Study on Predictive Scores of Myofascial Release.
In patients with large hernias, chronic retraction of the lateral abdominal wall muscles, and visceral contents that are irreducible within the hernia sac, closure of the midline can be difficult or even impossible. Component separation techniques (CST), in combination with transversus abdominis release (TAR), increase the flexibility of the abdominal wall and facilitate fascial medialization. However, these techniques alter the anatomy of the abdominal wall and are associated with higher risks of wound complications, abdominal wall disruption, and abdominal compartment syndrome (ACS).
Recently, the preoperative injection of Botulinum Toxin A (BTA) has been proposed as an effective form of chemical component separation of the muscles, or more precisely, chemical relaxation. It has been hypothesized that preoperative chemical paralysis of the lateral abdominal wall muscles through BTA increases abdominal wall compliance and facilitates fascial medialization, thereby reducing the need to resort to CST.
However, the current literature still lacks studies evaluating the impact of BTA on predictive scores for myofascial release and the correlation with intraoperative strategies.
연구 개요
연구 유형
등록 (추정된)
단계
- 2 단계
연락처 및 위치
연구 장소
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Milano
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Legnano, Milano, 이탈리아, 20025
- Asst Ovest Milanese
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참여기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
설명
Inclusion Criteria:
- Participant is willing and able to give informed consent for participation in the trial
- Compliance to follow-up
- Male and female
- Written informed consent to preoperative BTA injection and/or surgery
- Age 18 years old
- Primary ventral hernia
- Incisional ventral hernia
- RDR < 2
- Defect width 10 cm
- Loss of domain (LoD) 20%
Exclusion Criteria:
- Medical or psychiatric conditions that compromises the patient's ability to give informed
- consent or comply with the study protocol
- Personal reasons
- Age < 18 years old
- RDR ≥ 2
- Defect width < 10 cm
- LoD < 20%
- Pregnancy and breastfeeding
- Allergy/Intolerance to BTA
- Neuromuscular disorders and diseases
- Refuse to give informed consent to preoperative BTA injection and/or surgery
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위화되지 않음
- 중재 모델: 병렬 할당
- 마스킹: 없음(오픈 라벨)
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
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실험적: Posterior Component Separation (PCS) with TAR after BTA injection.
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Posterior Component Separation (PCS) with Transversus Abdominis Release (TAR) is an intraoperative surgical technique performed by the surgeon when a standard retromuscular repair, such as the Rives-Stoppa technique, does not allow for tension-free midline closure.
In such cases, additional myofascial release is required, and PCS with TAR is subsequently performed to achieve adequate medial advancement of the abdominal wall components and enable secure, tension-free closure of the midline defect.
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실험적: Rives-Stoppa surgery after BTA injection
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Rives-Stoppa repair is a retromuscular abdominal wall reconstruction technique used when primary fascial closure can be achieved without the need for additional myofascial release.
It represents a less invasive approach compared to component separation techniques, such as Posterior Component Separation with Transversus Abdominis Release (PCS with TAR), and is performed in cases where tension-free midline closure is feasible using a standard retromuscular plane dissection.
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Improvement in Preoperative Indices Following Botulinum Toxin A Injection
기간: Enrollment, 4 weeks after BTA injection, and 12 months after surgery
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Changes in preoperative radiological indices following Botulinum Toxin A (BTA) injection will be assessed using abdominal computed tomography (CT) scans.
The Rectus-to-Defect Ratio (RDR) will be calculated on pre- and post-injection CT imaging; each 0.5-point increase in RDR is associated with an approximate 20% linear reduction in the need for anterior myofascial release (AMR).
The Component Separation Index (CSI) will be determined on axial CT images using the aorta as a fixed reference point and the medial borders of the rectus abdominis muscles.
Abdominal cavity volume will be estimated using the ellipsoid volume formula based on craniocaudal, transverse, and anteroposterior diameters measured on CT imaging.
Pre- and post-BTA values will be compared to evaluate improvement in abdominal wall compliance and anatomical reconstruction parameters.
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Enrollment, 4 weeks after BTA injection, and 12 months after surgery
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Association Between Changes in Preoperative Indices After Botulinum Toxin A Injection and Surgical Strategy Selection.
기간: until the end of the study
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Two surgical strategies will be considered based on abdominal wall reconstruction requirements: (A) Posterior Component Separation (PCS) with Transversus Abdominis Release (TAR), and (B) Rives-Stoppa repair, performed when no myofascial release is required.
For PCS with TAR procedures, the Posterior Bridging Ratio (PBR) and Anterior Bridging Ratio (ABR) will be assessed as the proportion of the peritoneal sac used as a bridge to achieve tension-free closure of the posterior and anterior fascial layers, respectively.
The extent of ABR and PBR will be analyzed in relation to the preoperative effect of Botulinum Toxin A (BTA) injection.
In particular, higher percentages (>50%) of PBR and ABR will be considered indicative of poor BTA efficacy, intermediate values (25-50%) of partial efficacy, and low values (0-25%) of good to very good BTA efficacy.
The relationship between changes in preoperative indices after BTA administration and the selected surgical approach will be evaluated.
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until the end of the study
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공동 작업자 및 조사자
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
기본 완료 (추정된)
연구 완료 (추정된)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- 57-2024
- 2025-522451-25-00 (씨티스)
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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Posterior Component Separation (PCS) with TAR에 대한 임상 시험
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