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Schaaf S, Wöhler A, Gerlach P, Willms AG, Schwab R. [The use of botulinum toxin in hernia surgery: results of a survey in certified hernia centers]. CHIRURGIE (HEIDELBERG, GERMANY) 2024:10.1007/s00104-024-02121-x. [PMID: 38918261 DOI: 10.1007/s00104-024-02121-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/24/2024] [Indexed: 06/27/2024]
Abstract
BACKGROUND Botulinum toxin application into the abdominal wall prior to major hernia repair can reduce the complexity of surgery and has been increasingly used in recent years, even if it is an off-label use. OBJECTIVE To what extent is botulinum toxin used in hernia surgery in German-speaking countries and what is the current evidence in the literature? MATERIAL AND METHODS In a voluntary online survey of German Society for General and Visceral Surgery (DGAV)-certified competence centers and reference centers for hernia surgery, aspects of botulinum toxin application were surveyed and the results analyzed. RESULTS A total of 57 centers took part in the survey, of which 27 (47%) use botulinum toxin. The main reasons for not using it were lack of experience and reimbursement. Of the centers 85% have treated less than 50 patients with botulinum toxin. The main indications were midline hernias (M2-4 according to the EHS classification) with a hernia gap > 10 cm (W3 according to EHS classification) and loss of domain situations. The application was predominantly ultrasound-guided by designated hernia surgeons with 100-200 Allergan or 500 Speywood units 4-6 weeks preoperatively and without complications related to the botulinum toxin application. CONCLUSION Botulinum toxin injections in hernia surgery appear to be safe and effective. Ultrasound-guided preoperative bilateral administration is supported by the available data. Specific course and information formats should be offered by the hernia surgery institutions.
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Affiliation(s)
- Sebastian Schaaf
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Str. 170, 56072, Koblenz, Deutschland.
| | - Aliona Wöhler
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Str. 170, 56072, Koblenz, Deutschland
| | - Patricia Gerlach
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Str. 170, 56072, Koblenz, Deutschland
| | - Arnulf G Willms
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Str. 170, 56072, Koblenz, Deutschland
| | - Robert Schwab
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Str. 170, 56072, Koblenz, Deutschland
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Dries P, Verstraete B, Allaeys M, Van Hoef S, Eker H, Berrevoet F. Anterior versus posterior component separation technique for advanced abdominal wall reconstruction: a proposed algorithm. Hernia 2024:10.1007/s10029-024-03039-3. [PMID: 38652204 DOI: 10.1007/s10029-024-03039-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Abstract
OBJECTIVE The precise indications for employing the anterior component separation technique (ACST) and the Transversus Abdominis Release (TAR) in abdominal wall reconstruction (AWR) remain uncertain, despite the undeniable value of both techniques. The aim of this study was to analyze the anterior fascial closure rate, postoperative wound morbidity, and hernia recurrence rate for both procedures according to the algorithm used for complex AWR. METHODS A retrospective analysis of prospectively collected data was carried out. Patients undergoing AWR for midline incisional hernias using either open or endoscopic ACST (E-ACST) or TAR between March 2013 and August 2022 were included. Patients with lateral hernia components were excluded. The surgical technique was depending on the pre- and intraoperative findings regarding hernia width and on the estimated traction to achieve anterior fascial closure (see algorithm). Initially, intermediate hernia defects ranging from approximately 10-14 cm in width were repaired using E-ACST. However, as the study advanced, TAR became the preferred method for addressing these types of defects. Open ACST was consistently employed for defects wider than 14-15 cm throughout the entire study duration. Outcomes of interest were anterior fascial closure, surgical site occurrences, and hernia recurrence rate. Follow-up was performed at 1 month, 1 year, and 2 years. RESULTS A total of 119 patients underwent AWR with CST: 63 patients (52.9%) were included in the ACST group and 56 patients (47.1%) in the TAR group. No significant differences were observed in patient and hernia characteristics. The use of botulinum toxin A (BTA) injection and preoperative progressive pneumoperitoneum (PPP) was more frequently used in the ACST group (BTA 19.0%, PPP 15.9% versus BTA 5.4%, PPP 1.8% for TAR patients). Anterior fascial closure was achieved in 95.2% of the ACST group and 98.2% of the TAR group (p = 0.369). The TAR group demonstrated a significantly lower SSO rate at one month (44.3% versus 14.3%, p < 0.001) and required fewer procedural interventions (SSO-PI) (31.1% versus 8.9%, p = 0.003). The recurrence rate at one year was low and there was no statistically significant difference between the two groups (ACST 1.8% vs TAR 4.5%, p = 0.422). CONCLUSION Following a proposed algorithm, the anterior fascial closure rate was high and similar for both techniques. As postoperative wound morbidity is significantly increased after ACST, our findings support recommending TAR for defects up to 14 cm in width, while favoring open ACST for larger defects.
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Affiliation(s)
- P Dries
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium.
| | - B Verstraete
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium
| | - M Allaeys
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium
| | - S Van Hoef
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium
| | - H Eker
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium
| | - F Berrevoet
- Department for General and HPB Surgery and Liver Transplantation, Ghent University Hospital, Ghent, Belgium
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Cai X, Wang F, Zhu Y, Shen Y, Peng P, Cui Y, Di Z, Chen J. Application of bridging mesh repair in giant ventral incisional hernia. Updates Surg 2024:10.1007/s13304-024-01825-3. [PMID: 38555536 DOI: 10.1007/s13304-024-01825-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/06/2024] [Indexed: 04/02/2024]
Abstract
Achieving ideal abdominal wall reconstruction in giant ventral incisional hernia has been a challenging for surgeons. This study aimed to verify the safety and efficacy of bridging repair by comparing it with primary fascial closure (PFC) repair in the treatment of giant ventral incisional hernia. We retrospectively analyzed the clinical data of 92 patients with giant ventral incisional hernia who underwent mesh repair at our medical institution from January 1, 2014 to December 31, 2020. Patients were divided into 2 groups: the bridging repair group with 40 patients in whom repair was completed using the bridging technique and the PFC group with 52 patients in whom primary fascial closure was achieved and all patients underwent mesh reinforcement during the operation. The main outcome measures were recurrence rate and morbidity, especially intra-abdominal hypertension (IAH). Follow-up time of both groups lasted at least 24 months after surgery. After a median of 46 months and 65 months of follow-up, respectively, in the two groups, bridging repair did not increase the long-term recurrence rate (2.56%) in the larger defect area group compared to the PFC group (1.96%). There were no significant differences in perioperative morbidity, IAH, incidence of postoperative chronic pain, and sensory impairment of the abdominal wall between both groups. The application of bridging surgery in the treatment of complex giant ventral incisional hernias is safe and effective and does not significantly increase the postoperative recurrence rate.
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Affiliation(s)
- Xuan Cai
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Fan Wang
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Yilin Zhu
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Yingmo Shen
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Peng Peng
- Department of Hernia and Abdominal Wall Surgery, Peking University People's Hospital, No.11 Xizhimennan Str., Xicheng District, Beijing, 100044, China
| | - Yan Cui
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Zhishan Di
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Jie Chen
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China.
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Huerta S, Raj R, Chang J. Botulinum Toxin A as an Adjunct for the Repair Giant Inguinal Hernias: Case Reports and a Review of the Literature. J Clin Med 2024; 13:1879. [PMID: 38610644 PMCID: PMC11012701 DOI: 10.3390/jcm13071879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/17/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
The management of giant inguinoscrotal hernias remains a challenge as a result of the loss of the intra-abdominal domain from long-standing hernia contents within the scrotum. Multiple techniques have been described for abdominal wall relaxation and augmentation to allow the safe return of viscera from the scrotum to the intraperitoneal cavity without adversely affecting cardiorespiratory physiology. Preoperative progressive pneumoperitoneum, phrenectomy, and component separation are but a few common techniques previously described as adjuncts to the management of these massively large hernias. However, these strategies require an additional invasive stage, and reproducibility remains challenging. Botulinum toxin A (BTA) has been successfully used for the management of complex ventral hernias. Its use for these hernias has shown reproducibility and a low side effect profile. In the present report, we describe our institutional experience with BTA for giant inguinal hernias in two patients and present a review of the literature. In one case, a 77-year-old man with a substantial cardiac history presented with a giant left inguinal hernia that was interfering with his activities of daily living. He had BTA six weeks prior to inguinal hernia repair. Repair was performed via an inguinal incision with a favorable return of the viscera into the peritoneum. He was discharged on the same day of the operation. A second patient, 78 years of age, had a giant right inguinoscrotal hernia. He had a significant cardiac history and was treated with BTA six weeks prior to inguinal hernia repair via a groin incision. Neither patient had complaints nor recurrence at 7- and 3-month follow-ups. While the literature on this topic is scarce, we found 13 cases of inguinal hernias treated with BTA as an adjunct. BTA might be a promising adjunct for the management of giant inguinoscrotal hernias in addition to or in place of current strategies.
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Affiliation(s)
- Sergio Huerta
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA;
| | - Roma Raj
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA;
| | - Jonathan Chang
- Department of Anesthesia and Pain Management, VA North Texas Health Care System, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA;
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Pous-Serrano S, Bueno-Lledó J, García-Pastor P, Carreño-Sáenz O, Pareja-Ibars V, Bonafé-Diana S, Gea-Moreno AM, Martínez-Hoed J. Use of botulinum toxin type A in the prehabilitation of abdominal wall musculature for hernia repair: a consensus proposal. Cir Esp 2024:S2173-5077(24)00046-2. [PMID: 38342140 DOI: 10.1016/j.cireng.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 12/03/2023] [Indexed: 02/13/2024]
Abstract
The prehabilitation of the abdominal wall through the infiltration of botulinum toxin type A, which induces temporary chemical denervation ("chemical component separation") in the lateral abdominal musculature, is a common practice in units specialized in abdominal wall surgery. However, its use for this indication is currently off-label. The main objective of this article is to describe a consensus proposal regarding indications, contraindications, dosages employed, potential side effects, administration method, and measurement of possible outcomes. Additionally, a proposal for an informed consent document endorsed by the Abdominal Wall Section of the Spanish Association of Surgeons is attached.
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Affiliation(s)
- Salvador Pous-Serrano
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España.
| | - José Bueno-Lledó
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Providencia García-Pastor
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Omar Carreño-Sáenz
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Victoria Pareja-Ibars
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Santiago Bonafé-Diana
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Alba Maria Gea-Moreno
- Unidad de Cirugía de Pared y Corta Estancia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Jesús Martínez-Hoed
- Grupo Integrado de Trabajo en Hernia Compleja, Servicio de Cirugía General, Hospital R. A. Calderón Guardia, San José, Costa Rica
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Serafio-Gómez JL, Aragón-Quintana C, Bustillos-Ponce M, Varela-Barraza O, Silva B. Effective Management of Giant Ventral Hernias: A Comprehensive Approach Combining Preoperative Botulinum Toxin Application, Modified Ramírez's Component Separation, and Rives-Stoppa Hernioplasty. Cureus 2023; 15:e48967. [PMID: 38024062 PMCID: PMC10659588 DOI: 10.7759/cureus.48967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Giant ventral hernias are a surgical challenge due to their size and the need for a specialized approach during repair. Over the decades, abdominal wall surgery has evolved into a sophisticated field with a wide range of techniques aimed at improving patient outcomes. However, there is no universally accepted method suitable for repairing all giant ventral hernias. Surgeons must rely on a combination of techniques, choosing the approach that best matches their expertise, available resources, and the individual patient's specific needs. This article explores the effective use of a combination of techniques, including preoperative botulinum toxin application, modified Ramírez's component separation, and Rives-Stoppa hernioplasty, yielding excellent results and minimizing recurrences. Objective This study aims to provide a comprehensive literature review of giant ventral hernias. Additionally, we aim to share our experience in managing and repairing giant ventral hernias using a multi-modal approach, combining various surgical techniques with a focus on patient safety, reduced recurrence rates, and improved quality of life. Methods Between October 1, 2019, and October 1, 2021, six patients with giant ventral hernias were enrolled at our department of surgery. They received preoperative botulinum toxin A (BT) application, underwent corrective surgery involving modified component separation following the Ramírez method, and received Rives-Stoppa hernioplasty. Follow-up was conducted for at least six months. Results Six patients were included in the study: three women and three men. They had an average age of 53.6 years and an average body mass index of 31.8 kg/m2. The most common location of the hernia defect was supra and infraumbilical, among 66% of cases. The primary adverse effect associated with BT application was abdominal distension, reported in 33% of patients. No postoperative complications, such as abscesses or seromas, were observed. After the surgical procedure, the average hospital stay was 2.6 days, and no recurrences were noted within six months post-surgery. Conclusion The proposed method, which involves a combination of techniques, has demonstrated promising results based on our experience. However, to solidify these findings and better understand the full scope of this approach, further comprehensive statistical studies involving larger populations are essential. These studies will not only validate our results but also provide valuable insights for optimizing the management of giant ventral hernias.
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Affiliation(s)
- José Luis Serafio-Gómez
- General Surgery, Chihuahua City General Hospital "Dr. Salvador Zubirán Anchondo", Chihuahua, MEX
| | - César Aragón-Quintana
- General Surgery, Chihuahua City General Hospital "Dr. Salvador Zubirán Anchondo", Chihuahua, MEX
| | - Melanie Bustillos-Ponce
- General Medicine, Chihuahua City General Hospital "Dr. Salvador Zubirán Anchondo", Chihuahua, MEX
| | - Omar Varela-Barraza
- General Surgery, Hospital Regional de Alta Especialidad del Bajío, León, MEX
| | - Beatriz Silva
- General Medicine, Chihuahua City General Hospital "Dr. Salvador Zubirán Anchondo", Chihuahua, MEX
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Barretto VRD, de Oliveira JGR, Brim ACS, Araújo RBS, Barros RA, Romeo ALB. Botulinum toxin A in complex incisional hernia repair: a systematic review. Hernia 2023:10.1007/s10029-023-02892-y. [PMID: 37801164 DOI: 10.1007/s10029-023-02892-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 09/13/2023] [Indexed: 10/07/2023]
Abstract
PURPOSE To evaluate the safety, efficacy, and short and long-term postoperative results of using BTA. METHODS We conducted a systematic review following the recommendations of the PRISMA method. We systematically reviewed the MEDLINE/PubMed and SCOPUS electronic databases for studies published between January 2010 and September 2021. This systematic review was registered in PROSPERO, with registration number CRD42021252445. RESULTS After applying the selection criteria, 11 relevant articles were selected. The total sample size was 1058 patients. Most studies aimed to assess the rate of fascial closure, followed by the rate of recurrence and reporting of postoperative complications, as well as the need for the components separation technique (CST). None of the studies reported serious complications from using BTA. Regarding fascial closure, all articles had rates above 75%, except for one. Surgical site events ranged between 19% and 29.4%. No recurrence in the group that used BTA was recorded in five studies. The other articles reported recurrence rates ranging from 6.4 to 11.4% in the groups that received BTA. The studies had varying follow-up times ranging from 1 to 49 months, with a mean of 18.6 months (± 11.2). CONCLUSION This review described most of the key points about the preoperative use of BTA in hernia repair. It can be concluded that the use of BTA is a safe and effective practice that promotes good short and long-term results. However, the limitations of the current literature prevent more accurate conclusions on the subject.
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Affiliation(s)
- V R D Barretto
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Bahia, Brazil.
| | | | - A C S Brim
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Bahia, Brazil
| | - R B S Araújo
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Bahia, Brazil
| | - R A Barros
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Bahia, Brazil
| | - A L B Romeo
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Bahia, Brazil
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Petro CC, Melland-Smith M. Open Complex Abdominal Wall Reconstruction. Surg Clin North Am 2023; 103:961-976. [PMID: 37709399 DOI: 10.1016/j.suc.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
This article provides an approach to open complex abdominal wall reconstruction. Herein, the authors discuss the purpose of component separation as well as its relevant indications. The techniques and anatomical considerations of both anterior and posterior component separation are described. In addition, patient selection criteria, preoperative adjuncts that may assist with fascial or soft tissue closure, and complications of component separation will be discussed.
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Affiliation(s)
- Clayton C Petro
- Lerner College of Medicine, Cleveland Clinic Center for Abdominal Core Health, 9500 Euclid Avenue A-100, Cleveland, OH 44195, USA.
| | - Megan Melland-Smith
- Lerner College of Medicine, Cleveland Clinic Center for Abdominal Core Health, 9500 Euclid Avenue A-100, Cleveland, OH 44195, USA
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Ramaswamy A. Preoperative Optimization for Abdominal Wall Reconstruction. Surg Clin North Am 2023; 103:917-933. [PMID: 37709396 DOI: 10.1016/j.suc.2023.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Patients requiring abdominal wall reconstruction may have medical comorbidities and/or complex defects. Comorbidities such as smoking, diabetes, obesity, cirrhosis, and frailty have been associated with an increased risk of postoperative complications. Prehabilitation strategies are variably associated with improved outcomes. Large hernia defects and loss of domain may present challenges in achieving fascial closure, an important part of restoring abdominal wall function. Prehabilitation of the abdominal wall can be achieved with the use of botulinum toxin A, and preoperative progressive pneumoperitoneum.
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Whitehead-Clarke T, Windsor A. The Use of Botulinum Toxin in Complex Hernia Surgery: Achieving a Sense of Closure. Front Surg 2021; 8:753889. [PMID: 34660688 PMCID: PMC8517326 DOI: 10.3389/fsurg.2021.753889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/07/2021] [Indexed: 01/10/2023] Open
Abstract
Abdominal wall surgeons have developed a host of tools to help facilitate fascial closure. Botulinum toxin A is one of the most recently identified treatments and has grown in popularity over recent years; showing great promise in a number of case series and cohort studies. The toxin paralyses lateral abdominal wall muscles in order to increase laxity of the tissues—facilitating medialisation of the rectus muscles. Several research groups around the world are developing expertise with its use-uncovering its potential. We present a review of the relevant literature over the last two decades, summarising the key evidence behind its indications, dosing and effects.
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Affiliation(s)
- Thomas Whitehead-Clarke
- Centre for 3D Models of Health and Disease, Division of Surgery and Interventional Science, University College London, London, United Kingdom
| | - Alastair Windsor
- Alastair Windsor, Princess Grace Hospital, HCA Healthcare, London, United Kingdom
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