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Tanigaki S, Batra A, Chan TF, Kang JHL, Lam SK, Lim TYK, Mayya R, Nur Azurah AG, Walker G. Adhesion barriers in gynecologic surgeries and cesarean section: An Asia-Pacific expert panel consensus recommendation. Int J Gynaecol Obstet 2024. [PMID: 39277817 DOI: 10.1002/ijgo.15903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 08/13/2024] [Accepted: 08/27/2024] [Indexed: 09/17/2024]
Abstract
Adhesions arising from gynecologic surgeries and cesarean sections pose substantial clinical, social, and economic challenges, leading to issues like pelvic pain, infertility, bowel obstruction, and recurring surgeries. Preventing adhesions is a pressing unmet need, hindered by difficulties in assessing postoperative adhesions and understanding barriers. To bridge adhesion prevention gaps, statements on clinical practices were synthesized to present Asia-Pacific expert perspectives on gynecologic surgery and cesarean section adhesion prevention. An expert panel of eight physicians from various healthcare settings in the Asia-Pacific region was convened and a comprehensive literature search on topics related to adhesion prevention in gynecologic surgeries and cesarean sections was performed. Information from full-text publications was used to develop draft consensus statements, with each statement assigned the highest available evidence level based on a systematic literature review and graded using the Oxford Center for Evidence-based Medicine criteria. A modified Delphi process, involving two rounds of online voting and discussions with an extended group of 109 experts, was employed to reach a consensus on six topics related to adhesion barriers. A set of 15 consensus statements were synthesized. Key topics include adhesion incidence in Asia, cesarean section complications, barrier application status, adhesion formation and prevention, absorbable barriers' effectiveness, recommendations, and future considerations. The statements provide guidance for healthcare professionals, especially in the Asia-Pacific region, to tackle the challenges posed by postoperative adhesions and improve patient outcomes. Further research is needed to enhance understanding and prevention of adhesions in this region.
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Affiliation(s)
- Shinji Tanigaki
- Department of Obstetrics and Gynecology, Kyorin University School of Medicine, Tokyo, Japan
| | - Achla Batra
- Department of Obstetrics and Gynecology, Safdarjung Hospital, New Delhi, India
| | - Te-Fu Chan
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung, Taiwan
| | - Julian Hean-Leng Kang
- Department of Obstetrics and Gynecology, KK Women's and Children's Hospital, Singapore, Singapore
| | | | - Timothy Yong-Kuei Lim
- Timothy Lim Clinic for Women & Cancer Surgery, Mount Alvernia Hospital, Singapore, Singapore
| | - Raghavendra Mayya
- Advanced Surgery Division, Baxter Worldwide Medical Affairs, Singapore, Singapore
| | - Abdul Ghani Nur Azurah
- Department of Obstetrics and Gynecology, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
| | - Graeme Walker
- Department of Obstetrics and Gynecology, Gold Coast Private Hospital, Gold Coast, Australia
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Schaefer SD, Alkatout I, Dornhoefer N, Herrmann J, Klapdor R, Meinhold-Heerlein I, Meszaros J, Mustea A, Oppelt P, Wallwiener M, Kraemer B. Prevention of peritoneal adhesions after gynecological surgery: a systematic review. Arch Gynecol Obstet 2024; 310:655-672. [PMID: 38878233 PMCID: PMC11258159 DOI: 10.1007/s00404-024-07584-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 06/03/2024] [Indexed: 07/19/2024]
Abstract
IMPORTANCE The formation of adhesions after gynecological surgery not only has detrimental impacts on those affected, including pain, obstruction, and infertility, but also imposes a high economic burden on healthcare systems worldwide. OBJECTIVE The aim of this review was to evaluate the adhesion prevention potential of all currently available adhesion barriers for gynecological surgery. EVIDENCE ACQUISITION We systematically searched MEDLINE and CENTRAL databases for randomized controlled trials (RCTs) on the use of adhesion barriers as compared with peritoneal irrigation or no treatment in gynecological surgery. Only RCTs with second-look surgery to evaluate adhesions in the pelvic/abdominal (but not intrauterine) cavity were included. RESULTS We included 45 RCTs with a total of 4,120 patients examining a total of 10 unique types of barriers in second-look gynecological surgery. While RCTs on oxidized regenerated cellulose (significant improvement in 6 of 14 trials), polyethylene glycol with/without other agents (4/10), hyaluronic acid and hyaluronate + carboxymethylcellulose (7/10), icodextrin (1/3), dextran (0/3), fibrin-containing agents (1/2), expanded polytetrafluoroethylene (1/1), N,O-carboxymethylchitosan (0/1), and modified starch (1/1) overall showed inconsistent findings, results for expanded polytetrafluoroethylene, hyaluronic acid, and modified starch yielded the greatest improvements regarding adhesion reduction at 75%, 0-67%, and 85%, respectively. CONCLUSIONS AND RELEVANCE Best results for adhesion prevention were reported after applying Gore-Tex Surgical Membrane, hyaluronic acid, and 4DryField®. As Gore-Tex Surgical Membrane is nonabsorbable, it is associated with a greater risk of new adhesion formation due to second-look surgery to remove the product. 4DryField® yielded the greatest improvement in adhesion score compared to all other barrier agents (85%). For better comparability, future studies should use standardized scores and put more emphasis on patient-reported outcome measures, such as pain and infertility.
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Affiliation(s)
- Sebastian D Schaefer
- Department of Gynecology and Obstetrics, Clemenshospital Muenster, Münster, Germany.
| | - Ibrahim Alkatout
- Department of Gynecology and Obstetrics, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - Nadja Dornhoefer
- Department of Gynecology, University Hospital Leipzig, Leipzig, Germany
| | - Joerg Herrmann
- Department of Gynecology and Obstetrics, Weimar Hospital, Weimar, Germany
| | - Ruediger Klapdor
- Department of Gynecology and Obstetrics, Albertinen Hospital Hamburg, Hamburg, Germany
| | - Ivo Meinhold-Heerlein
- Department of Gynecology and Obstetrics, University Hospital Giessen, Giessen, Germany
| | - Jozsef Meszaros
- Department of Gynecology, Obstetrics and Reproductive Medicine, University Hospital Magdeburg, Magdeburg, Germany
| | - Alexander Mustea
- Department of Gynecology and Gynecological Oncology, University Hospital Bonn, Bonn, Germany
| | - Peter Oppelt
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Johannes Kepler University, Kepler University Hospital Linz, Linz, Austria
| | - Markus Wallwiener
- Department of Gynecology and Obstetrics, University Hospital Halle, Halle, Germany
| | - Bernhard Kraemer
- Department of Women's Health, University Hospital Tuebingen, Tübingen, Germany
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Krämer B, Andress J, Neis F, Hoffmann S, Brucker S, Kommoss S, Höller A. Improvement in Fertility and Pain after Endometriosis Resection and Adhesion Prevention with 4DryField ® PH: Follow-up of a Randomized Controlled Clinical Trial. J Clin Med 2023; 12:jcm12103597. [PMID: 37240703 DOI: 10.3390/jcm12103597] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/06/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Adhesions after endometriosis resection are frequent and the most common causes for chronic pain and secondary infertility. Primary results of our randomized controlled trial (RCT) on adhesion prevention after deep infiltrating endometriosis (DIE) resection using the gel barrier 4DryField® PH showed 85% adhesion reduction in second-look surgeries. Secondary endpoint data on fertility and pain development were collected during 12-month follow-ups. METHODS This RCT comprised 50 patients. Preoperatively and after 1, 6 and 12 months, pain scores for cycle-independent pelvic pain, dysmenorrhea, dyspareunia, dyschezia, and dysuria, as well as the number of pregnancies, were recorded,. RESULTS The pregnancy rate in the intervention group was significantly higher (p < 0.05). Pain development was also improved: after 12 months, all 5 subscores were lower in the intervention group and improvements were more pronounced, most prominently concerning cycle-independent pelvic pain and dysmenorrhea, the two subcategories with the highest preoperative scores and, therefore, the highest relevance for the patients. Cycle-independent pelvic pain even recurred in the control group, while barrier application prevented this. CONCLUSIONS Considering the known causal link between adhesions and pain, it is apparent that the favourable outcomes in the intervention group are linked to effective adhesion prevention. The significant increase in pregnancies is remarkable.
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Affiliation(s)
- Bernhard Krämer
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Jürgen Andress
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Felix Neis
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Sascha Hoffmann
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Sara Brucker
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Stefan Kommoss
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
| | - Alice Höller
- Department for Women's Health, University Hospital Tübingen, Calwerstr. 7, 72076 Tübingen, Germany
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Li LP, Li ZM, Wang ZZ, Cheng YF, He DM, Chen G, Cao BN, Zou Y, Luo Y. A novel nude mouse model for studying the pathogenesis of endometriosis. Exp Ther Med 2022; 24:498. [PMID: 35837067 PMCID: PMC9257831 DOI: 10.3892/etm.2022.11425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/19/2022] [Indexed: 11/29/2022] Open
Abstract
Endometriosis is a common female gynecological disease that is characterized by the presence of functional endometrial tissue outside the uterine cavity. At present, many animal models have been established. However, previous studies consistently use human endometrial tissue implanted in the subcutaneous or abdominal cavity for modeling and rarely use endometrial cells. In the present study, we ascertained whether immortalized stromal and/or epithelial endometrial cells are able to induce subcutaneous endometriosis in nude mice. Mixed human immortalized endometriosis stromal and epithelial cells, but not the cells of Group 1 or Group 2, were successfully constructed and led to endometriotic-like lesions. The endometriosis-like lesions observed in nude mice consisted of endometriosis-like glands lined with columnar epithelial cells and surrounded by stromal cells in the fibrous fatty connective tissue. Immunofluorescence analysis showed that glandular epithelial cells were intensely stained for E-cadherin and cytokeratin 7, and surrounding stromal cells were mildly stained for neprilysin (CD10) and vimentin. Moreover, the cells present in the endometriosis-like lesions were of human origin. Our data indicate that the mixture of human immortalized endometriosis stromal cells and epithelial cells is able to establish subcutaneous endometriosis lesions in nude mice. This model could be used to understand the molecular mechanisms involved in the occurrence and development of endometriosis.
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Affiliation(s)
- Li-Ping Li
- Prenatal Diagnosis Center, Nanchang, Jiangxi 330006, P.R. China
| | - Zeng-Ming Li
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Zhao-Zhen Wang
- Department of Clinical Medicine, Jiangxi Health Vocational College, Nanchang, Jiangxi 330052, P.R. China
| | - Yu-Fen Cheng
- Department of Gynecology, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - De-Ming He
- Department of Pathology, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Ge Chen
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Bian-Na Cao
- Department of Gynecology, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Yang Zou
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Yong Luo
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, P.R. China
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Waldron MG, Judge C, Farina L, O’Shaughnessy A, O’Halloran M. Barrier materials for prevention of surgical adhesions: systematic review. BJS Open 2022; 6:6602139. [PMID: 35661871 PMCID: PMC9167938 DOI: 10.1093/bjsopen/zrac075] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/07/2022] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Postoperative surgical adhesions constitute a major health burden internationally. A wide range of materials have been evaluated, but despite constructive efforts and the obvious necessity, there remains no specific barrier widely utilized to prevent postoperative adhesion formation. The aim of this study was to highlight and characterize materials used for prevention of postoperative surgical adhesions in both animal and human studies. METHODS A systematic review was performed of all original research articles presenting data related to the prevention of postoperative adhesions using a barrier agent. All available observational studies and randomized trials using animal models or human participants were included, with no restrictions related to type of surgery. PubMed and Embase databases were searched using key terms from inception to August 2019. Standardized data collection forms were used to extract details for each study and assess desirable characteristics of each barrier and success in animal and/or human studies. RESULTS A total of 185 articles were identified for inclusion in the review, with a total of 67 unique adhesion barrier agents (37 natural and 30 synthetic materials). Desirable barrier characteristics of an ideal barrier were identified on review of the literature. Ten barriers achieved the primary outcome of reducing the incidence of postoperative adhesions in animal studies followed with positive outputs in human participants. A further 48 materials had successful results from animal studies, but with no human study performed to date. DISCUSSION Multiple barriers showed promise in animal studies, with several progressing to success, and fulfilment of desirable qualities, in human trials. No barrier is currently utilized commonly worldwide, but potential barriers have been identified to reduce the burden of postoperative adhesions and associated sequelae.
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Affiliation(s)
- Michael Gerard Waldron
- Correspondence to: Michael Gerard Waldron, Translational Medical Device Lab, Galway University Hospital, Newcastle Road, Galway, Ireland H91YR71 (e-mail: )
| | - Conor Judge
- Translational Medical Device Laboratory, National University of Ireland Galway, Galway, Ireland
| | - Laura Farina
- Translational Medical Device Laboratory, National University of Ireland Galway, Galway, Ireland
| | - Aoife O’Shaughnessy
- Translational Medical Device Laboratory, National University of Ireland Galway, Galway, Ireland
| | - Martin O’Halloran
- Translational Medical Device Laboratory, National University of Ireland Galway, Galway, Ireland
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Adhesion prevention after endometriosis surgery - results of a randomized, controlled clinical trial with second-look laparoscopy. Langenbecks Arch Surg 2021; 406:2133-2143. [PMID: 34036409 PMCID: PMC8481146 DOI: 10.1007/s00423-021-02193-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/10/2021] [Indexed: 12/02/2022]
Abstract
Purpose Adhesion formation after endometriosis surgery is a severe problem affecting up to 90% of patients. Possible complications include chronic pain, ileus, and secondary infertility. Therefore, effective adhesion prophylaxis is desirable, for which the adhesion barrier 4DryField® PH is evaluated in the present clinical study. It is a starch-based powder that forms a gel after irrigation with saline solution and thus separates surgical sites as physical barrier for adhesion prevention. Methods Fifty patients with extensive and deep infiltrating endometriosis were included in this prospective, randomized, controlled clinical trial with two-staged laparoscopic approach. The patients were randomized into two groups, one receiving 4DryField® PH and the other irrigation with saline solution for adhesion prevention. Adhesion formation was directly scored during second-look interventions considering incidence, extent, and severity. Adhesion prevention treatment in the second surgery was performed corresponding to the first intervention to evaluate the long-term outcome in the later course. Results Both groups were comparable with respect to relevant patient parameters. Severity and extent of adhesions were significantly reduced by 85% in the 4DryField® PH group compared to the control group (mean total adhesion score 2.2 vs. 14.2; p = 0.004). Incidence of adhesion formation based on the number of affected sites was significantly reduced by 53% in the intervention vs. control group (mean 1.1 vs. 2.3 sites; p = 0.004). Follow-up of secondary endpoints is not yet completed; results will become available at a later stage. Conclusion Adhesion formation could be reduced significantly by 85% by application of the adhesion barrier 4DryField® PH. Trial registration Trial registration main ID: DRKS00014720, secondary ID: U1111-1213-4142; date of registration 09th May 2018.
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Abstract
The development of adhesions after gynecologic surgery is a severe problem with ramifications that go beyond the medical complications patients suffer (which most often include pain, obstruction and infertility), since they also impose a huge financial burden on the health care system and increase the workload of surgeons and all personnel involved in surgical follow-up care. Surgical techniques to avoid adhesion formation have not proven to be sufficient and pharmaceutical approaches for their prevention are even less effective, which means that the use of adhesion prevention devices is essential for achieving decent prophylaxis. This review explores the wide range of adhesion prevention products currently available on the market. Particular emphasis is put on prospective randomized controlled clinical trials that include second-look interventions, as these offer the most solid evidence of efficacy. We focused on adhesion scores, which are the most common way to quantify adhesion formation. This enables a direct comparison of the efficacies of different devices. While the greatest amount of data are available for oxidized regenerated cellulose, the outcomes with this adhesion barrier are mediocre and several studies have shown little efficacy. The best results have been achieved using adhesion barriers based on either modified starch, i.e., 4DryField® PH (PlantTec Medical GmbH, Lüneburg, Germany), or expanded polytetrafluoroethylene, i.e., GoreTex (W.L. Gore & Associates, Inc., Medical Products Division, Flagstaff, AZ), albeit the latter, as a non-resorbable barrier, has a huge disadvantage of having to be surgically removed again. Therefore, 4DryField® PH currently appears to be a promising approach and further studies are recommended.
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Safety of Use of a Sheet-Type Adhesion Barrier (Interceed ®) During Liver Surgery. World J Surg 2020; 44:4214-4220. [PMID: 32808075 DOI: 10.1007/s00268-020-05743-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Adhesion barriers are increasingly used in hepatobiliary surgery. However, there has been no solid evidence yet in support of their safety. METHODS Incidences of global postoperative morbidities and major abdominal morbidities were compared between 101 consecutive patients who received a sheet-type adhesion barrier (Interceed®) and 134 patients who did not receive any adhesion barriers during hepatectomy. Propensity score (PS) adjustment was used to account for potential bias to receive Interceed. RESULTS In the PS-adjusted population, the incidences of both global postoperative morbidities and major abdominal morbidities showed no significant difference between the Interceed group and the control group (17.9% vs. 17.6%; P = 0.948 and 7.8% vs. 9.1%; P = 0.813, respectively). Multivariate analysis showed that age + 10 years (odds ratio [OR], 1.70; 95% CI, 1.15-2.50; P = 0.007), estimated blood loss + 100 mL (OR, 1.05; 95% CI, 1.01-1.09, P = 0.009), and laparoscopic approach (OR, 0.10; 95% CI, 0.01-0.75; P = 0.026) were independent predictors for global postoperative morbidities and operation time + 1 h (OR, 1.56; 95% CI, 1.23-1.96; P < 0.001) was a risk factor for major abdominal morbidity, while no specific association between the use of Interceed and the risk of postoperative morbidity was observed. CONCLUSIONS Use of Interceed does not increase the risk of postoperative morbidities after hepatectomy.
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Ahmad G, Kim K, Thompson M, Agarwal P, O'Flynn H, Hindocha A, Watson A. Barrier agents for adhesion prevention after gynaecological surgery. Cochrane Database Syst Rev 2020; 3:CD000475. [PMID: 32199406 PMCID: PMC7085418 DOI: 10.1002/14651858.cd000475.pub4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Pelvic adhesions can form secondary to inflammation, endometriosis, or surgical trauma. Strategies to reduce pelvic adhesion formation include placing barrier agents such as oxidised regenerated cellulose, polytetrafluoroethylene, and fibrin or collagen sheets between pelvic structures. OBJECTIVES To evaluate the effects of barrier agents used during pelvic surgery on rates of pain, live birth, and postoperative adhesions in women of reproductive age. SEARCH METHODS We searched the following databases in August 2019: the Cochrane Gynaecology and Fertility (CGF) Specialised Register of Controlled Trials, MEDLINE, Embase, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsycINFO, the Cochrane Central Register of Controlled Trials (CENTRAL), Epistemonikos, and trial registries. We searched reference lists of relevant papers, conference proceedings, and grey literature sources. We contacted pharmaceutical companies for information and handsearched relevant journals and conference abstracts. SELECTION CRITERIA Randomised controlled trials (RCTs) on the use of barrier agents compared with other barrier agents, placebo, or no treatment for prevention of adhesions in women undergoing gynaecological surgery. DATA COLLECTION AND ANALYSIS Three review authors independently assessed trials for eligibility and risk of bias and extracted data. We calculated odds ratios (ORs) or mean differences (MDs) with 95% confidence intervals (CIs) using a fixed-effect model. We assessed the overall quality of the evidence using GRADE (Grades of Recommendation, Assessment, Development and Evaluation) methods. MAIN RESULTS We included 19 RCTs (1316 women). Seven RCTs randomised women; the remainder randomised pelvic organs. Laparoscopy (eight RCTs) and laparotomy (11 RCTs) were the primary surgical techniques. Indications for surgery included myomectomy (seven RCTs), ovarian surgery (five RCTs), pelvic adhesions (five RCTs), endometriosis (one RCT), and mixed gynaecological surgery (one RCT). The sole indication for surgery in three of the RCTs was infertility. Thirteen RCTs reported commercial funding; the rest did not state their source of funding. No studies reported our primary outcomes of pelvic pain and live birth rate. Oxidised regenerated cellulose versus no treatment at laparoscopy or laparotomy (13 RCTs) At second-look laparoscopy, we are uncertain whether oxidised regenerated cellulose at laparoscopy reduced the incidence of de novo adhesions (OR 0.50, 95% CI 0.30 to 0.83, 3 RCTs, 360 participants; I² = 75%; very low-quality evidence) or of re-formed adhesions (OR 0.17, 95% CI 0.07 to 0.41, 3 RCTs, 100 participants; I² = 36%; very low-quality evidence). At second-look laparoscopy, we are uncertain whether oxidised regenerated cellulose affected the incidence of de novo adhesions after laparotomy (OR 0.72, 95% CI 0.42 to 1.25, 1 RCT, 271 participants; very low-quality evidence). However, the incidence of re-formed adhesions may have been reduced in the intervention group (OR 0.38, 95% CI 0.27 to 0.55, 6 RCTs, 554 participants; I² = 41%; low-quality evidence). No studies reported results on pelvic pain, live birth rate, adhesion score, or clinical pregnancy rate. Expanded polytetrafluoroethylene versus oxidised regenerated cellulose at gynaecological surgery (two RCTs) We are uncertain whether expanded polytetrafluoroethylene reduced the incidence of de novo adhesions at second-look laparoscopy (OR 0.93, 95% CI 0.26 to 3.41, 38 participants; very low-quality evidence). We are also uncertain whether expanded polytetrafluoroethylene resulted in a lower adhesion score (out of 11) (MD -3.79, 95% CI -5.12 to -2.46, 62 participants; very low-quality evidence) or a lower risk of re-formed adhesions (OR 0.13, 95% CI 0.02 to 0.80, 23 participants; very low-quality evidence) when compared with oxidised regenerated cellulose. No studies reported results regarding pelvic pain, live birth rate, or clinical pregnancy rate. Collagen membrane with polyethylene glycol and glycerol versus no treatment at gynaecological surgery (one RCT) Evidence suggests that collagen membrane with polyethylene glycol and glycerol may reduce the incidence of adhesions at second-look laparoscopy (OR 0.04, 95% CI 0.00 to 0.77, 47 participants; low-quality evidence). We are uncertain whether collagen membrane with polyethylene glycol and glycerol improved clinical pregnancy rate (OR 5.69, 95% CI 1.38 to 23.48, 39 participants; very low-quality evidence). One study reported adhesion scores but reported them as median scores rather than mean scores (median score 0.8 in the treatment group vs median score 1.2 in the control group) and therefore could not be included in the meta-analysis. The reported P value was 0.230, and no evidence suggests a difference between treatment and control groups. No studies reported results regarding pelvic pain or live birth rate. In total, 15 of the 19 RCTs included in this review reported adverse events. No events directly attributed to adhesion agents were reported. AUTHORS' CONCLUSIONS We found no evidence on the effects of barrier agents used during pelvic surgery on pelvic pain or live birth rate in women of reproductive age because no trial reported these outcomes. It is difficult to draw credible conclusions due to lack of evidence and the low quality of included studies. Given this caveat, low-quality evidence suggests that collagen membrane with polyethylene glycol plus glycerol may be more effective than no treatment in reducing the incidence of adhesion formation following pelvic surgery. Low-quality evidence also shows that oxidised regenerated cellulose may reduce the incidence of re-formation of adhesions when compared with no treatment at laparotomy. It is not possible to draw conclusions on the relative effectiveness of these interventions due to lack of evidence. No adverse events directly attributed to the adhesion agents were reported. The quality of the evidence ranged from very low to moderate. Common limitations were imprecision and poor reporting of study methods. Most studies were commercially funded, and publication bias could not be ruled out.
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Affiliation(s)
- Gaity Ahmad
- Pennine Acute Hospitals NHS TrustDepartment of Obstetrics and GynaecologyManchesterUK
| | - Kyungmin Kim
- Pennine Acute Hospitals NHS TrustManchesterUKM8 5RB
| | | | | | - Helena O'Flynn
- Pennine Acute Hospitals NHS TrustDepartment of Obstetrics and GynaecologyManchesterUK
| | - Akshay Hindocha
- Pennine Acute Hospitals NHS TrustDepartment of Obstetrics and GynaecologyManchesterUK
| | - Andrew Watson
- Tameside & Glossop Acute Services NHS TrustDepartment of Obstetrics and GynaecologyFountain StreetAshton‐Under‐LyneLancashireUKOL6 9RW
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Berkesoglu M, Karabulut YY, Yildirim DD, Turkmenoglu OM, Dirlik MM. Topical Application of High-Dose Mesna Prevents Adhesion Formation: An Experimental Animal Study. J Surg Res 2020; 251:152-158. [PMID: 32145558 DOI: 10.1016/j.jss.2020.01.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 12/29/2019] [Accepted: 01/25/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Adhesion formation is a common complication of abdominal surgeries. Mesna is a drug with fibrinolytic properties which has been used in surgical field to facilitate tissue dissection. The aim of this experimental animal study was to investigate the effect of mesna on prevention of intra-abdominal adhesion in rats. MATERIALS AND METHODS Twenty-eight Wistar albino rats were used in the study. To create abdominal adhesion, cecum was abraded in all rats. No additional surgical procedure was performed other than adhesion in group 1 (only adhesion). In the other groups, rats were treated topically by administering 0.9% saline (group 2), 40 mg/kg mesna (group 3), and 400 mg/kg mesna (group 4). All rats were sacrificed on postoperative 21st day. Histopathological and macroscopic evaluations of adhesion formation were performed. RESULTS Quantity of adhesion scores (P = 0.022), severity of adhesion scores (P = 0.041), total adhesion scores (P = 0.023), and histopathological adhesion grading scores (P < 0.001) were reduced by 400 mg/kg mesna. CONCLUSIONS This is the first study for mesna on prevention of abdominal adhesion formation in rats. We concluded that dose-dependent reduction of adhesion was achieved by mesna. With future studies, topical administration of mesna during open abdominal surgeries may be used to prevent adhesion formation.
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Affiliation(s)
- Mustafa Berkesoglu
- Department of General Surgery, Faculty of Medicine, Mersin University, Mersin, Turkey.
| | | | - Didem Derici Yildirim
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, Mersin University, Mersin, Turkey
| | - Ozgur M Turkmenoglu
- Department of General Surgery, Faculty of Medicine, Mersin University, Mersin, Turkey
| | - Musa M Dirlik
- Department of General Surgery, Faculty of Medicine, Mersin University, Mersin, Turkey
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A prospective multi-center registry concerning the clinical performance of laparoscopic colorectal surgery using an absorbable adhesion barrier (INTERCEED ®) made of oxidized regenerated cellulose. Surg Today 2019; 49:877-884. [PMID: 31037393 PMCID: PMC6754356 DOI: 10.1007/s00595-019-01816-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 01/12/2023]
Abstract
Purpose The aim of this prospective multi-center registry was to evaluate the safety and clinical performance of INTERCEED® in laparoscopic colorectal surgery. Methods This study was a prospective, multi-center, single-arm registry wherein patients who received INTERCEED® in laparoscopic colorectal surgery were registered consecutively (UMIN-CTR 00001872). The primary outcome was the incidence rate of postoperative adhesive small intestinal obstruction within 6 months. The secondary outcomes were reoperation related to postoperative bleeding and anastomotic leak, surgical site infection (SSI) and anastomotic leak. Results Between March 2012 and March 2015, a total of 202 patients were enrolled from six institutions. INTERCEED® was not applied in two patients, so 200 patients were analyzed using the full analysis set population. The incidence rate of postoperative adhesive intestinal obstruction was 1.0% (2/200). The total SSI rate was 3.5% (7/200), the deep incisional SSI rate was 0.0% (0/200), and the organ SSI rate was 0.0% (0/200). The incidence of anastomotic leak was 1.0% (2/200). Reoperation was performed in two cases: one for anastomotic leak and the other as cardiac surgery due to heart disease. Conclusions Using INTERCEED® in laparoscopic colorectal surgery is safe and may be useful for preventing postoperative adhesive small intestinal obstruction.
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Farag S, Padilla PF, Smith KA, Sprague ML, Zimberg SE. Management, Prevention, and Sequelae of Adhesions in Women Undergoing Laparoscopic Gynecologic Surgery: A Systematic Review. J Minim Invasive Gynecol 2018; 25:1194-1216. [DOI: 10.1016/j.jmig.2017.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 12/11/2017] [Accepted: 12/17/2017] [Indexed: 01/09/2023]
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Acidic organelles mediate TGF-β1-induced cellular fibrosis via (pro)renin receptor and vacuolar ATPase trafficking in human peritoneal mesothelial cells. Sci Rep 2018; 8:2648. [PMID: 29422602 PMCID: PMC5805675 DOI: 10.1038/s41598-018-20940-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/26/2018] [Indexed: 01/30/2023] Open
Abstract
TGF-β1, which can cause renal tubular injury through a vacuolar-type H+-ATPase (V-ATPase)-mediated pathway, is induced by the glucose degradation product methylglyoxal to yield peritoneal injury and fibrosis. The present study investigated the roles of V-ATPase and its accessory protein, the (pro)renin receptor, in peritoneal fibrosis during peritoneal dialysis. Rats daily administered 20 mM methylglyoxal intraperitoneally developed significant peritoneal fibrosis after 7 days with increased expression of TGF-β and V-ATPase, which was reduced by the inhibition of V-ATPase with co-administration of 100 mM bafilomycin A1. The (pro)renin receptor and V-ATPase were expressed in acidic organelles and cell membranes of human peritoneal mesothelial cells. TGF-β1 upregulated the expression of collagens, α-SMA, and EDA-fibronectin, together with ERK1/2 phosphorylation, which was reduced by inhibition of V-ATPase, (pro)renin receptor, or the MAPK pathway. Fibronectin and the soluble (pro)renin receptor were excreted from cells by acidic organelle trafficking in response to TGF-β1; this excretion was also suppressed by inhibition of V-ATPase. Soluble (pro)renin receptor concentrations in effluents of patients undergoing peritoneal dialysis were associated with the dialysate-to-plasma ratio of creatinine. Together, these results demonstrate a novel fibrosis mechanism through the (pro)renin receptor and V-ATPase in the acidic organelles of peritoneal mesothelial cells.
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Schmitt VH, Mamilos A, Schmitt C, Neitzer-Planck CNE, Rajab TK, Hollemann D, Wagner W, Krämer B, Hierlemann H, James Kirkpatrick C, Brochhausen C. Tissue response to five commercially available peritoneal adhesion barriers-A systematic histological evaluation. J Biomed Mater Res B Appl Biomater 2017; 106:598-609. [DOI: 10.1002/jbm.b.33835] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/23/2016] [Accepted: 12/05/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Volker H. Schmitt
- Cardiology I, Centre for Cardiology; University Medical Centre, Johannes Gutenberg University of Mainz; Mainz Germany
| | - Andreas Mamilos
- REPAIR-lab, European Institute of Excellence on Tissue Engineering and Regenerative Medicine; Institute of Pathology, University of Regensburg; Regensburg Germany
| | - Christine Schmitt
- Department of Internal Medicine; St. Vincenz and Elisabeth Hospital of Mainz (KKM); Mainz Germany
| | - Constanze N. E. Neitzer-Planck
- Department of Gynaecology and Obstetrics; University of Tuebingen; Tuebingen Germany
- German Centre of Biomaterials and Artificial Organs e.V. Denkendorf; Germany
| | | | - David Hollemann
- Department of Internal Medicine; St. Vincenz and Elisabeth Hospital of Mainz (KKM); Mainz Germany
| | - Willi Wagner
- Diagnostic and Interventional Radiology; University Medical Center Heidelberg; Heidelberg Germany
| | - Bernhard Krämer
- Department of Gynaecology and Obstetrics; University of Tuebingen; Tuebingen Germany
| | - Helmut Hierlemann
- German Centre of Biomaterials and Artificial Organs e.V. Denkendorf; Germany
- Institute of Textile Technology and Process Engineering; Denkendorf Germany
| | - C. James Kirkpatrick
- Department of Biomaterials; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
| | - Christoph Brochhausen
- Department of Internal Medicine; St. Vincenz and Elisabeth Hospital of Mainz (KKM); Mainz Germany
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Atta HM, Al-Hendy AA, Abdel Raheim SR, Abdel-Ghany H, Nasif KA, Abdellah AM, Zenhom NM, Kamel HS. Modified Adenovirus Reduces De Novo Peritoneal Adhesions in Rats and Limits Off-Target Transfection. Role of EZH2 in Adhesion Formation. J INVEST SURG 2016; 30:78-87. [PMID: 27690696 DOI: 10.1080/08941939.2016.1229366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AIM OF THE STUDY Adenovector encoding tissue plasminogen activator (tPA) was shown to reduce experimental peritoneal adhesion. We investigated the targeting potential of our modified adenovector, its ability to reduce adhesions and the epigenetic role of histone methyltransferase EZH2 in adhesion formation. MATERIALS AND METHODS Control lacZ, nonmodified tPA or modified tPA vectors were instilled in the peritoneal cavity after injury in de novo adhesions or after lysis of adhesions in recurrent adhesions. Adhesion severity was scored and adhesions and liver tissues were examined for adenovirus E4 gene and tPA mRNA expression. Levels of tPA, plasminogen activator inhibitor-1 (PAI-1), transforming growth factor-β1 (TGF-β1), and EZH2 expression were measured. RESULTS E4 transcripts were detected in adhesions of nonmodified and modified and in livers of nonmodified but not in livers of modified de novo adhesions. Both nonmodified (p = 0.021) and modified vectors (p = 0.036) reduced the severity of de novo adhesions compared to lacZ vector. Levels of tPA in nonmodified (p = 0.021) and modified adhesions (p = 0.001) were elevated while PAI-1 (p = 0.013 and p = 0.001, respectively) and TGF-β1 levels (p = 0.002 and p = 0.016, respectively) were reduced compared with lacZ group. All vectors were not expressed in recurrent adhesions and severity score were not different among groups. EZH2 levels were elevated in de novo nontreated (p = 0.001) and was further increased in recurrent (p = 0.001) nontreated adhesions compared with noninjured peritoneum. CONCLUSION Modified adenovirus successfully targeted de novo adhesions but not liver tissues and reduced the severity of de novo adhesions. EZH2 is involved in the development and progression of peritoneal adhesions.
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Affiliation(s)
- Hussein M Atta
- a Department of Surgery , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Ayman A Al-Hendy
- b Department of Obstetrics and Gynecology , Georgia Regents University , Augusta , Georgia , USA
| | - Salama R Abdel Raheim
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Hend Abdel-Ghany
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Khalid A Nasif
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Ahlam M Abdellah
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Nagwa M Zenhom
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
| | - Heba S Kamel
- c Department of Biochemistry , Faculty of Medicine, Minia University , El-Minia , Egypt
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Atta H, El-Rehany M, Roeb E, Abdel-Ghany H, Ramzy M, Gaber S. Mutant matrix metalloproteinase-9 reduces postoperative peritoneal adhesions in rats. Int J Surg 2016; 26:58-63. [PMID: 26790972 DOI: 10.1016/j.ijsu.2015.12.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/24/2015] [Accepted: 12/07/2015] [Indexed: 01/27/2023]
Abstract
INTRODUCTION Postoperative peritoneal adhesions continue to be a major source of morbidity and occasional mortality. Studies have shown that matrix metalloproteinase-9 (MMP-9) levels are decreased postoperatively which may limits matrix degradation and participate in the development of peritoneal adhesions. In this proof-of-principle study, we evaluated the effect of gene therapy with catalytically inactive mutant MMP-9 on postoperative peritoneal adhesions in rats. METHODS Adenovirus encoding mutant MMP-9 (Ad-mMMP-9) or saline was instilled in the peritoneal cavity after cecal and parietal peritoneal injury in rats. Expression of mutant MMP-9 transcript was verified by sequencing. Adenovirus E4 gene expression, adhesion scores, MMP-9, tissue plasminogen activator (tPA), plasminogen activator inhibitor-1 (PAI-1) and transforming growth factor-β1 (TGF-β1) expression were evaluated at sacrifice one week after treatment. RESULTS Both mutant MMP-9 transcripts and adenovirus E4 gene were expressed in Ad-mMMP-9 treated adhesions. Adhesions severity decreased significantly (p = 0.036) in the Ad-mMMP-9-treated compared with saline-treated adhesions. Expression of MMP-9 mRNA and protein were elevated (p = 0.001 and p = 0.029, respectively) in the Ad-mMMP-9-treated adhesions compared with saline-treated adhesions. While tPA levels were increased (p = 0.02) in Ad-mMMP-9 treated adhesions compared with saline-treated adhesions, TGF-β1 and PAI-1 levels were decreased (p = 0.017 and p = 0.042, respectively). No difference in mortality were found between groups (p = 0.64). CONCLUSIONS Mutant MMP-9 gene therapy effectively transduced peritoneal adhesions resulting in reduction of severity of primary peritoneal adhesions.
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Affiliation(s)
- Hussein Atta
- Department of Surgery, Faculty of Medicine, Minia University, Misr-Aswan Road, El-Minia 61519, Egypt.
| | - Mahmoud El-Rehany
- Department of Biochemistry, Faculty of Medicine, Minia University, Misr-Aswan Road, El-Minia 61519, Egypt.
| | - Elke Roeb
- Department of Gastroenterology, Justus-Liebig University Giessen, Germany.
| | - Hend Abdel-Ghany
- Department of Biochemistry, Faculty of Medicine, Minia University, Misr-Aswan Road, El-Minia 61519, Egypt.
| | - Maggie Ramzy
- Department of Biochemistry, Faculty of Medicine, Minia University, Misr-Aswan Road, El-Minia 61519, Egypt.
| | - Shereen Gaber
- Department of Biochemistry, Faculty of Medicine, Minia University, Misr-Aswan Road, El-Minia 61519, Egypt.
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Montalvo-Javé EE, Mendoza-Barrera GE, García-Pineda MA, Jaime Limón ÁR, Montalvo-Arenas C, Castell Rodríguez AE, Tapia Jurado J. Histological Analysis of Intra-Abdominal Adhesions Treated with Sodium Hyaluronate and Carboxymethylcellulose Gel. J INVEST SURG 2015; 29:80-7. [DOI: 10.3109/08941939.2015.1076911] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Beyene RT, Kavalukas SL, Barbul A. Intra-abdominal adhesions: Anatomy, physiology, pathophysiology, and treatment. Curr Probl Surg 2015; 52:271-319. [PMID: 26258583 DOI: 10.1067/j.cpsurg.2015.05.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 05/12/2015] [Indexed: 12/18/2022]
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Ahmad G, O'Flynn H, Hindocha A, Watson A. Barrier agents for adhesion prevention after gynaecological surgery. Cochrane Database Syst Rev 2015; 2015:CD000475. [PMID: 25924805 PMCID: PMC7043269 DOI: 10.1002/14651858.cd000475.pub3] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Pelvic adhesions can form as a result of inflammation, endometriosis or surgical trauma. During pelvic surgery, strategies to reduce pelvic adhesion formation include placing barrier agents such as oxidised regenerated cellulose, polytetrafluoroethylene or fibrin sheets between the pelvic structures. OBJECTIVES To evaluate the effects of barrier agents used during pelvic surgery on rates of pain, live birth and postoperative adhesions in women of reproductive age. SEARCH METHODS We searched the following databases in February 2015: the Menstrual Disorders and Subfertility Group (MDSG) Specialised Register of Controlled Trials, MEDLINE, EMBASE, CINAHL, PsycINFO, the Cochrane Central Register of Controlled Trials (CENTRAL) and trial registries. We handsearched relevant journals, conference proceedings and grey literature sources and we contacted pharmaceutical companies for information. SELECTION CRITERIA Randomised controlled trials (RCTs) of the use of barrier agents compared with other barrier agents, placebo or no treatment for the prevention of adhesions in women undergoing gynaecological surgery. DATA COLLECTION AND ANALYSIS Two review authors independently assessed trials for eligibility and risk of bias and extracted the data. We calculated odds ratios (ORs) or mean differences (MD) with 95% confidence intervals (CIs) using a fixed effect model. The overall quality of the evidence was assessed using GRADE (Grades of Recommendation, Assessment, Development and Evaluation) methods. MAIN RESULTS Eighteen RCTs (1262 women) were included. Six RCTs randomised women; the remainder randomised pelvic organs. Laparoscopy (eight RCTs) and laparotomy (10 RCTs) were the primary surgical techniques. Indications for surgery included myomectomy (six RCTs), ovarian surgery (five RCTs), pelvic adhesions (five RCTs), endometriosis (one RCT) and mixed (one RCT). The sole indication for surgery in three of the RCTs was infertility. Twelve RCTs reported commercial funding; the rest did not state their source of funding.No studies reported either of our primary outcomes of pelvic pain and live birth. Oxidised regenerated cellulose (Interceed) versus no treatment at laparoscopy or laparotomy (13 RCTs)At second-look laparoscopy oxidised regenerated cellulose at laparoscopy was associated with reduced incidence of de novo adhesions (OR 0.50, 95% CI 0.30 to 0.83, three RCTs, 360 participants, I(2) = 75%, very low-quality evidence) and of re-formed adhesions (OR 0.17, 95% CI 0.07 to 0.41, three RCTs, 100 participants, I(2) = 36%, low quality evidence).At second-look laparoscopy no evidence was found of any difference between the groups in the incidence of de novo adhesions after laparotomy (OR 0.72, 95% CI 0.42 to 1.25, one RCT, 271 participants, I(2) = 41%, low-quality evidence). However, the incidence of re-formed adhesions was lower in the intervention group (OR 0.38, 95% CI 0.27 to 0.55, six RCTs, 554 participants, moderate-quality evidence). Expanded polytetrafluoroethylene (Gore-Tex) versus no treatment at gynaecological surgery (one RCT) The evidence suggested that at second-look laparoscopy expanded polytetrafluoroethylene was associated with a reduction in new adhesion formation (OR 0.17, 95% CI 0.03 to 0.94, one RCT, 42 participants, low-quality evidence). Expanded polytetrafluoroethylene (Gore-Tex) versus oxidised regenerated cellulose (Interceed) at gynaecological surgery (two RCTs)One RCT found no difference between the groups at second-look laparoscopy in the incidence of de novo adhesions (OR 0.93, 95% CI 0.26 to 3.41, 38 participants, very low-quality evidence). A second RCT suggested that the expanded polytetrafluoroethylene group had a lower adhesion score (out of 11) (MD -3.79, 95% CI -5.12 to -2.46, 62 participants, very low-quality evidence) and a lower risk of re-formed adhesions (OR 0.13, 95% CI 0.02 to 0.80, 23 participants, very low-quality evidence). This last finding was sensitive to choice of effect estimate and no longer suggested a difference between the groups when a risk ratio was calculated (RR 0.36, 95% CI 0.13 to 1.01). Sodium hyaluronate and carboxymethylcellulose (Seprafilm) versus no treatment at gynaecological surgery (one RCT)Sodium hyaluronate and carboxymethylcellulose was associated with a lower adhesion score (out of 4) at second-look laparoscopy (MD 0.49, 95% CI 0.53 to 0.45, one RCT, 127 participants, moderate-quality evidence). Fibrin sheet versus no treatment at laparoscopic myomectomy (one RCT)There was no evidence of a difference between the groups in the incidence of de novo adhesions at second-look laparoscopy (OR 1.20, 95% CI 0.42 to 3.41, one RCT, 62 participants) or in adhesion score (out of 4) (MD 0.14, 95% CI -0.67 to 0.39, one RCT, 48 participants, low-quality evidence).Fourteen of the 18 RCTs reported adverse events. No events directly attributed to adhesion agents were reported. AUTHORS' CONCLUSIONS We found no evidence on the effects of barrier agents used during pelvic surgery on either pain or fertility outcomes in women of reproductive age.Low quality evidence suggests that oxidised regenerated cellulose (Interceed), expanded polytetrafluoroethylene (Gore-Tex) and sodium hyaluronate with carboxymethylcellulose (Seprafilm) may all be more effective than no treatment in reducing the incidence of adhesion formation following pelvic surgery. There is no conclusive evidence on the relative effectiveness of these interventions. There is no evidence to suggest that fibrin sheet is more effective than no treatment. No adverse events directly attributed to the adhesion agents were reported. The quality of the evidence ranged from very low to moderate. The most common limitations were imprecision and poor reporting of study methods. Most studies were commercially funded, and publication bias could not be ruled out.
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Affiliation(s)
- Gaity Ahmad
- Pennine Acute NHS TrustObstetrics & GynaecologyManchesterUK
| | - Helena O'Flynn
- Pennine Acute Hospitals NHS TrustDepartment of Obstetrics and GynaecologyDelaunays RoadCrumpsallManchesterUKM8 5RB
| | - Akshay Hindocha
- Pennine Acute Hospitals NHS TrustDelaunays RoadCrumpsallManchesterUKM8 5RB
| | - Andrew Watson
- Tameside General HospitalTameside & Glossop Acute Services NHS TrustFountain StreetAshton‐Under‐LyneLancashireUKOL6 9RW
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Oner G, Ulug P. A systemic review of randomized controlled studies about prevention with pharmacologic agents of adhesion formation in the rat uterine horn model. Arch Med Sci 2015; 11:274-81. [PMID: 25995741 PMCID: PMC4424244 DOI: 10.5114/aoms.2014.47875] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/28/2014] [Accepted: 05/09/2014] [Indexed: 12/30/2022] Open
Abstract
INTRODUCTION Evaluation of treatment attempts in postoperative adhesion formation is pivotal for the prevention of several morbidities including infertility, pelvic pain, bowel obstruction, and subsequent intraoperative complications. The purpose of this systemic review was to assess the literature on the rat uterine horn model for adhesion formation and treatment modalities to prevent adhesion in the most frequently used experimental animal model. MATERIAL AND METHODS We performed a systemic review of publications from January 1(st) 2000 to December 31(st) 2013 via a PubMed search. A high number of agents were evaluated for the prevention of postoperative adhesion formation in the rat uterine horn model. RESULTS According to most of the studies, adjuvants such as antiinflamatuars, antiestrogens, antioxidants were effective to prevent adhesion formation. CONCLUSIONS Prevention of adhesion formation is pivotal and numerous types of agents were described in the literature were summarized in this review.
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Affiliation(s)
- Gokalp Oner
- Department of Obstetric and Gynecology, Mugla Sitki Kocman University, Mugla, Turkey
| | - Pasa Ulug
- Department of Obstetric and Gynecology, Erzincan University, Erzincan, Turkey
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Coelho Junior ER, Costa LOBF, Alencar AV, Barbosa APG, Pinto FCM, Aguiar JLDA. Prevention of peritoneal adhesion using a bacterial cellulose hydrogel, in experimental study. Acta Cir Bras 2015; 30:194-8. [DOI: 10.1590/s0102-865020150030000005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 02/16/2015] [Indexed: 11/21/2022] Open
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Correia AR. Adhesion Prevention in Laparoscopic Surgery. J Gynecol Surg 2014. [DOI: 10.1089/gyn.2013.0079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- André Reis Correia
- Department of Gynaecology/Obstetrics–Hospital D. Estefânia, Centro Hospitalar de Lisboa Central, Lisbon, Portugal
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Standardised models for inducing experimental peritoneal adhesions in female rats. BIOMED RESEARCH INTERNATIONAL 2014; 2014:435056. [PMID: 24809049 PMCID: PMC3997962 DOI: 10.1155/2014/435056] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 03/19/2014] [Indexed: 11/17/2022]
Abstract
Animal models for adhesion induction are heterogeneous and often poorly described. We compare and discuss different models to induce peritoneal adhesions in a randomized, experimental in vivo animal study with 72 female Wistar rats. Six different standardized techniques for peritoneal trauma were used: brushing of peritoneal sidewall and uterine horns (group 1), brushing of parietal peritoneum only (group 2), sharp excision of parietal peritoneum closed with interrupted sutures (group 3), ischemic buttons by grasping the parietal peritoneum and ligating the base with Vicryl suture (group 4), bipolar electrocoagulation of the peritoneum (group 5), and traumatisation by electrocoagulation followed by closure of the resulting peritoneal defect using Vicryl sutures (group 6). Upon second look, there were significant differences in the adhesion incidence between the groups (P < 0.01). Analysis of the fraction of adhesions showed that groups 2 (0%) and 5 (4%) were significantly less than the other groups (P < 0.01). Furthermore, group 6 (69%) was significantly higher than group 1 (48%) (P < 0.05) and group 4 (47%) (P < 0.05). There was no difference between group 3 (60%) and group 6 (P = 0.2). From a clinical viewpoint, comparison of different electrocoagulation modes and pharmaceutical adhesion barriers is possible with standardised models.
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Razmaria AA, Marchetti PE, Prasad SM, Shalhav AL, Gundeti MS. Does robot-assisted laparoscopic ileocystoplasty (RALI) reduce peritoneal adhesions compared with open surgery? BJU Int 2013; 113:468-75. [DOI: 10.1111/bju.12284] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aria A. Razmaria
- Pediatric Urology; Section of Urology; Department of Surgery; The University of Chicago Medicine and Biological Sciences Division; Comer Children's Hospital; Chicago IL USA
| | - Pablo E. Marchetti
- Pediatric Urology; Section of Urology; Department of Surgery; The University of Chicago Medicine and Biological Sciences Division; Comer Children's Hospital; Chicago IL USA
| | - Sandip M. Prasad
- Pediatric Urology; Section of Urology; Department of Surgery; The University of Chicago Medicine and Biological Sciences Division; Comer Children's Hospital; Chicago IL USA
| | - Arieh L. Shalhav
- Pediatric Urology; Section of Urology; Department of Surgery; The University of Chicago Medicine and Biological Sciences Division; Comer Children's Hospital; Chicago IL USA
| | - Mohan S. Gundeti
- Pediatric Urology; Section of Urology; Department of Surgery; The University of Chicago Medicine and Biological Sciences Division; Comer Children's Hospital; Chicago IL USA
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Esser E, Tessmar JKV. Preparation of well-defined calcium cross-linked alginate films for the prevention of surgical adhesions. J Biomed Mater Res B Appl Biomater 2013; 101:826-39. [DOI: 10.1002/jbm.b.32886] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 11/14/2012] [Accepted: 11/29/2012] [Indexed: 11/10/2022]
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Behçet AL, Kılıç H, Zengin S, Güler M, Taysi S, Yıldırım C, Sarı İ. Efficiency of Ankaferd Blood Stopper used in bleeding control on intraabdominal adhesions formed postoperatively. Clin Appl Thromb Hemost 2013; 20:524-9. [PMID: 23288869 DOI: 10.1177/1076029612471710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
PURPOSE The purpose of this study is to investigate the hispathological, biochemical, and clinical efficiency of Ankaferd Blood Stopper (ABS) in preventing postoperative intraabdominal adhesions. METHOD A total of 40 Wistar albino species female rats were randomly separated into 4 groups. For the control group, 1 mL normal saline was administered; and for the second, third, and fourth groups 0.5, 1, and 2 mL, respectively, ABS was administered. Statistical analyses were evaluated with Tukey and analysis of variance test. FINDINGS Significant increase was observed in fibroblast and vascularization microscopically with increasing amount of ABS used. Degree of adhesion in the group administered with normal saline was lower compared to the other groups. Adhesion thickness and prevalence macroscopically increased with the increasing amount of ABS used in groups. CONCLUSION It was determined in our study that ABS is not efficient in preventing intraabdominal adhesions; on the contrary, adhesions were increased with the increased amount of ABS used.
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Affiliation(s)
- A L Behçet
- Emergency Department of Medicine Faculty, Gaziantep University, Gaziantep, Turkey
| | - Hasan Kılıç
- Emergency Department of Malatya State Hospital, Malatya, Turkey
| | - Suat Zengin
- Emergency Department of Medicine Faculty, Gaziantep University, Gaziantep, Turkey
| | - Mehmet Güler
- General Surgery Department of Medicine Faculty, Gaziantep University, Gaziantep, Turkey
| | - Seyithan Taysi
- Biochemistry Department of Medicine Faculty, Gaziantep University, Gaziantep, Turkey
| | - Cuma Yıldırım
- Emergency Department of Medicine Faculty, Gaziantep University, Gaziantep, Turkey
| | - İbrahim Sarı
- Pathology Department of Medicine Faculty, Gaziantep, Turkey
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Atta HM. Prevention of peritoneal adhesions: a promising role for gene therapy. World J Gastroenterol 2011; 17:5049-58. [PMID: 22171139 PMCID: PMC3235588 DOI: 10.3748/wjg.v17.i46.5049] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Revised: 07/14/2011] [Accepted: 07/21/2011] [Indexed: 02/06/2023] Open
Abstract
Adhesions are the most frequent complication of abdominopelvic surgery, yet the extent of the problem, and its serious consequences, has not been adequately recognized. Adhesions evolved as a life-saving mechanism to limit the spread of intraperitoneal inflammatory conditions. Three different pathophysiological mechanisms can independently trigger adhesion formation. Mesothelial cell injury and loss during operations, tissue hypoxia and inflammation each promotes adhesion formation separately, and potentiate the effect of each other. Studies have repeatedly demonstrated that interruption of a single pathway does not completely prevent adhesion formation. This review summarizes the pathogenesis of adhesion formation and the results of single gene therapy interventions. It explores the promising role of combinatorial gene therapy and vector modifications for the prevention of adhesion formation in order to stimulate new ideas and encourage rapid advancements in this field.
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Hirschelmann A, Tchartchian G, Wallwiener M, Hackethal A, De Wilde RL. A review of the problematic adhesion prophylaxis in gynaecological surgery. Arch Gynecol Obstet 2011; 285:1089-97. [PMID: 22037682 PMCID: PMC3303068 DOI: 10.1007/s00404-011-2097-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 09/21/2011] [Indexed: 01/15/2023]
Abstract
Background Adhesions lead to considerable patient morbidity and are a mounting burden on surgeons and the health care system alike. Although adhesion formation is the most frequent complication in abdominal and pelvic surgery, many surgeons are still not aware of the extent of the problem. To provide the best care for their patients, surgeons should consistently inform themselves of anti-adhesion strategies and include these methods in their daily routine. Methods Searches were conducted in PubMed and The Cochrane Library to identify relevant literature. Findings Various complications are associated with adhesion formation, including small bowel obstruction, infertility and chronic pelvic pain. Increasingly, an understanding of adhesion formation as a complex process influenced by many different factors has led to various conceivable anti-adhesion strategies. At present, a number of different anti-adhesion agents are available. Although some agents have proved effective in reducing adhesion formation in randomised controlled trials, none of them can completely prevent adhesion formation. Conclusion To fulfil our duty to provide best possible care for our patients, it is now time to regard adhesions as the most common complication in surgery. Further research is needed to fully understand adhesion formation and to develop new strategies for adhesion prevention. Large clinical efficacy trials of anti-adhesion agents will make it easier for surgeons to decide which agent to use in daily routine.
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Affiliation(s)
- Anja Hirschelmann
- Pius-Hospital, Klinik für Frauenheilkunde und Geburtshilfe, Georgstraße 12, 26121 Oldenburg, Germany
| | - Garri Tchartchian
- Klinik für Minimal Invasive Chirurgie, Kurstraße 11, 14129 Berlin-Zehlendorf, Germany
| | - Markus Wallwiener
- Department of Obstetrics and Gynaecology, Heidelberg University Hospital, Voßstraße 9, 69115 Heidelberg, Germany
| | - Andreas Hackethal
- Giessen School of Endoscopic Surgery, Klinikstraße 32, 35392 Giessen, Germany
| | - Rudy Leon De Wilde
- Pius-Hospital, Klinik für Frauenheilkunde und Geburtshilfe, Georgstraße 12, 26121 Oldenburg, Germany
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Barrier methods used to prevent pelvic adhesions in videolaparoscopy: experimental study in female rabbits. Surg Endosc 2011; 25:2637-42. [DOI: 10.1007/s00464-011-1617-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Accepted: 02/06/2011] [Indexed: 11/27/2022]
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Schnüriger B, Barmparas G, Branco BC, Lustenberger T, Inaba K, Demetriades D. Prevention of postoperative peritoneal adhesions: a review of the literature. Am J Surg 2011; 201:111-21. [PMID: 20817145 DOI: 10.1016/j.amjsurg.2010.02.008] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 02/16/2010] [Accepted: 02/16/2010] [Indexed: 12/24/2022]
Abstract
BACKGROUND postoperative adhesions are a significant health problem with major implications on quality of life and health care expenses. The purpose of this review was to investigate the efficacy of preventative techniques and adhesion barriers and identify those patients who are most likely to benefit from these strategies. METHODS the National Library of Medicine, Medline, Embase, and Cochrane databases were used to identify articles related to postoperative adhesions. RESULTS ileal pouch-anal anastomosis, open colectomy, and open gynecologic procedures are associated with the highest risk of adhesive small-bowel obstruction (class I evidence). Based on expert opinion (class III evidence) intraoperative preventative principles, such as meticulous hemostasis, avoiding excessive tissue dissection and ischemia, and reducing remaining surgical material have been published. Laparoscopic techniques, with the exception of appendicitis, result in fewer adhesions than open techniques (class I evidence). Available bioabsorbable barriers, such as hyaluronic acid/carboxymethylcellulose and icodextrin 4% solution, have been shown to reduce adhesions (class I evidence). CONCLUSIONS postoperative adhesions are a significant health problem with major implications on quality of life and health care. General intraoperative preventative techniques, laparoscopic techniques, and the use of bioabsorbable mechanical barriers in the appropriate cases reduce the incidence and severity of peritoneal adhesions.
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Affiliation(s)
- Beat Schnüriger
- Los Angeles County Medical Center, University of Southern California, Department of Surgery, Division of Acute Care Surgery, Trauma, Emergency Surgery and Surgical Critical Care, LAC + USC Medical Center, Room 1105, 1200 North State St, Los Angeles, CA, USA
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Shi Z, Ma L, Yang Y, Wang H, Schreiber A, Li X, Tai S, Zhao X, Teng J, Zhang L, Lu W, An Y, Alla NR, Cui T. Adhesion formation after previous caesarean section-a meta-analysis and systematic review. BJOG 2010; 118:410-22. [DOI: 10.1111/j.1471-0528.2010.02808.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pérez-Medina T, Álvarez J, Degollada M, de Santiago J, Lara A, Pascual A, Pérez Milán F, Crowe AM. Documento de consenso del Grupo de Trabajo sobre las Adherencias de la sección de endoscopia de la SEGO. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.pog.2010.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Silva MSDBE, Melo RMD, Menezes LBD, Malmonge SM, Franco LG, Paulo NM. 2-hydroxyethyl methacrylate composite - polypropylene mesh for preventing peritoneal adhesions in female dogs. Acta Cir Bras 2010; 25:342-6. [PMID: 20676492 DOI: 10.1590/s0102-86502010000400008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Accepted: 04/19/2010] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate whether the lining facing the visceral side of polypropylene mesh made with 2-hydroxyethyl methacrylate (p(HEMA)) hydrogel could avoid peritoneal adhesion in female dogs. METHODS Eight animals (group PP) had a polypropylene mesh implanted to correct a defect in the rectal abdominal muscle, whereas in the other group (group PH) the polypropylene mesh was coated with p(HEMA) composite on the surface facing the peritoneal area. RESULTS Adhesions were observed on the mesh in 62.5% of the PP group. In the PH group adhesions were present only on the suture lines. CONCLUSION p(HEMA) hydrogel was well tolerated and effective in avoiding visceral and omental adhesions on the surface of the polypropylene mesh.
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Peritoneal damage: the inflammatory response and clinical implications of the neuro-immuno-humoral axis. World J Surg 2010; 34:704-20. [PMID: 20049432 DOI: 10.1007/s00268-009-0382-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND The peritoneum is a bilayer serous membrane that lines the abdominal cavity. We present a review of peritoneal structure and physiology, with a focus on the peritoneal inflammatory response to surgical injury and its clinical implications. METHODS We conducted a nonsystematic clinical review. A search of the Ovid MEDLINE database from 1950 through January 2009 was performed using the following search terms: peritoneum, adhesions, cytokine, inflammation, and surgery. RESULTS The peritoneum is a metabolically active organ, responding to insult through a complex array of immunologic and inflammatory cascades. This response increases with the duration and extent of injury and is central to the concept of surgical stress, manifesting via a combination of systemic effects, and local neural pathways via the neuro-immuno-humoral axis. There may be a decreased systemic inflammatory response after minimally invasive surgery; however, it is unclear whether this is due to a reduced local peritoneal reaction. CONCLUSIONS Interventions that dampen the peritoneal response and/or block the neuro-immuno-humoral pathway should be further investigated as possible avenues of enhancing recovery after surgery, and reducing postoperative complications.
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Prevention of intra-peritoneal adhesions in gynaecological surgery: theory and evidence. Reprod Biomed Online 2010; 21:290-303. [PMID: 20688570 DOI: 10.1016/j.rbmo.2010.04.021] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 03/15/2010] [Accepted: 04/13/2010] [Indexed: 11/21/2022]
Abstract
Post-operative adhesions are a significant complication of all abdominal surgical procedures. The major strategies for adhesion prevention in gynaecological surgery are focused on the optimization of surgical technique and use of anti-adhesive agents, which fall into two main categories: pharmacological agents and barriers. Surgical technique that minimizes peritoneal trauma can reduce, but cannot prevent post-operative adhesion formation. Various local and systemic drugs that can alter the local inflammatory response, inhibit the coagulation cascade and promote fibrinolysis have been evaluated. Limited data support the administration of post-operative corticosteroids in addition to systemic intra-operative corticosteroids for the prevention of adhesions after gynaecological surgery. None of the remaining pharmacological agents have been found effective for the reduction of post-operative adhesions. Barriers are currently considered the most useful adjuncts, which may reduce adhesion formation. They act by separating the traumatized peritoneal surfaces during the healing period. The separation can be achieved by solid barriers or fluids. There is limited evidence from randomized clinical trials that support the beneficial effect of most of these barrier agents in the prevention of intra-peritoneal adhesions after gynaecological surgery. However, the evidence is not adequate for definite conclusions to be drawn and further research in this field is warranted.
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Kamel RM. Prevention of postoperative peritoneal adhesions. Eur J Obstet Gynecol Reprod Biol 2010; 150:111-8. [PMID: 20382467 DOI: 10.1016/j.ejogrb.2010.02.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 12/15/2009] [Accepted: 02/01/2010] [Indexed: 11/17/2022]
Abstract
Adhesions are bands of tissue that connect organs together. It is frequently reported after surgery and remains a major problem for health and society. Efforts to prevent or reduce peritoneal adhesions mostly have been unsuccessful, hindered by their empirical basis, lack of good predictive animal models and complexity of adhesion pathogenesis. Although a good surgical technique is a crucial part of adhesion prevention, the technique alone cannot effectively eliminate the adhesions. Thus, there remains a room for further research. A comprehensive literature review of published experimental and clinical studies of adhesion prevention was carried out at the University of Bristol electronic library (MetaLib) with cross-search of seven different medical databases (AMED-Allied and Complementary Medicine Database, BIOSIS Previews on Web of Knowledge, Cochrane Library, Embase and Medline on Web of Knowledge, OvidSP and PubMed) by using key words (peritoneal adhesions, postoperative adhesions, prevention) to explore the progress in different surgical strategies and adjuvant materials used to prevent adhesions formation and reformation. By the end of the study, recommendations formulated for surgeons to be followed during the operations to prevent, as much as possible, the postoperative adhesions.
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Affiliation(s)
- Remah M Kamel
- European University Diploma of Operative Endoscopy, France.
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A novel polypeptide derived from human lactoferrin in sodium hyaluronate prevents postsurgical adhesion formation in the rat. Ann Surg 2010; 250:1021-8. [PMID: 19953722 DOI: 10.1097/sla.0b013e3181b246a7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The objective of the study was to evaluate whether a peptide derived from human lactoferrin, PXL01 could act safely to reduce the formation of peritoneal adhesions in the rat model and to map the molecular mechanisms of its action. SUMMARY BACKGROUND DATA Adhesion formation is a significant problem within every surgical discipline causing suffering for the patients and major cost for the society. For many decades, attempts have been made to reduce postsurgical adhesions by reducing surgical trauma. It is now believed that major improvements in adhesion prevention will only be reached by developing dedicated antiscarring products, which are administrated in connection to the surgical intervention. METHODS Anti-inflammatory as well as fibrinolytic activities of PXL01 were studied in relevant human cell lines. Using the sidewall defect-cecum abrasion model in the rat, the adhesion prevention properties of PXL01 formulated in sodium hyaluronate were evaluated. Large bowel anastomosis healing model in the rat was applied to study if PXL01 would have any negative effects on intestine healing. RESULTS PXL01 exhibits an inhibitory effect on the most important hallmarks of scar formation by reducing infections, prohibiting inflammation, and promoting fibrinolysis. PXL01 formulated in sodium hyaluronate markedly reduced formation of peritoneal adhesions in rat without any adverse effects on wound healing. CONCLUSIONS A new class of synthetically derived water soluble low molecular weight peptide compound, PXL01 showed marked reduction of peritoneal adhesion formation in an animal model without any negative effects on healing. On the basis of these data, a comprehensive adhesion prevention regimen in clinical situation is expected.
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Ahn HS, Lee HJ, Yoo MW, Jeong SH, Han TS, Kim WH, Song SC, Yang HK. Efficacy of an Injectable Thermosensitive Gel on Postoperative Adhesion in Rat Model. JOURNAL OF THE KOREAN SURGICAL SOCIETY 2010. [DOI: 10.4174/jkss.2010.79.4.239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hye Seong Ahn
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Hyuk-Joon Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Moon-Won Yoo
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Sang-Ho Jeong
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Tae-Su Han
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Woo-Ho Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Soo-Chang Song
- Division of Life Science, Korea Institute of Science and Technology, Seoul, Korea
| | - Han-Kwang Yang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Guo H, Leung JCK, Cheung JS, Chan LYY, Wu EX, Lai KN. Non-viral Smad7 gene delivery and attenuation of postoperative peritoneal adhesion in an experimental model. Br J Surg 2009; 96:1323-35. [PMID: 19847872 DOI: 10.1002/bjs.6722] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Postoperative intra-abdominal adhesion is associated with high morbidity and mortality. Smad7, a protein that occupies a strategic position in fibrogenesis, inhibits the transforming growth factor (TGF) beta/Smad signalling pathway. In this study the therapeutic potential of exogenous Smad7 in preventing fibrogenesis in postoperative intra-abdominal adhesion was investigated. METHODS Intra-abdominal adhesion was induced in a rodent model by peritoneal abrasion. Smad7 was delivered into the peritoneal cavity by a non-viral ultrasound-microbubble-mediated naked gene transfection system. The effect of Smad7 transgene on adhesion formation was studied by measuring changes in TGF-beta, fibrogenic factors, alpha-SMA and Smad2/3 activation in the anterior abdominal wall. RESULTS Four weeks after surgical abrasion, all rats developed significant peritoneal adhesion with enhanced TGF-beta expression, increased levels of extracellular matrix components and activated myofibroblasts, accompanied by decreased Smad7 expression and increased Smad2/3 activation. In rats treated with the Smad7 transgene, the incidence and severity of peritoneal adhesion were significantly reduced, with biochemical downregulation of fibrogenic factors and inhibition of Smad2/3 activation. Serial quantitation using magnetic resonance imaging revealed a significant reduction in adhesion areas from day 14 onwards. CONCLUSION Ultrasound-microbubble-mediated gene transfection provides timely targeted gene delivery for the treatment of postoperative peritoneal adhesions.
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Affiliation(s)
- H Guo
- Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong
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A randomised controlled trial on melatonin and rosiglitazone for prevention of adhesion formation in a rat uterine horn model. Arch Gynecol Obstet 2009; 282:55-61. [PMID: 19834723 DOI: 10.1007/s00404-009-1240-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2009] [Accepted: 09/25/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE To investigate the effectiveness of melatonin and rosiglitazone in reducing postoperative adhesion formation in a rat uterine horn model. METHODS Thirty non-pregnant female Wistar albino rats, weighing 180-220 g, were used as a model for postoperative adhesion formation. The rats were randomised into three groups after seven standard lesions were inflicted in a 2-cm segment of each uterine horn and lower abdominal sidewall using bipolar cauterisation. The rats were treated with 10 mg/kg, intraperitoneal melatonin, and 1 mg/kg per day peroral rosiglitazone. No medication was given to the control group. As much as 20 uterine horns of 10 rats were evaluated in each group. Extent, severity, and degree of the adhesions to the uterine horns and, inflammation and fibrosis scores (histopathologically) were evaluated after 2 weeks of the treatment. RESULTS There was no mortality in the groups and all of the rats recovered without incident after operation. Rosiglitazone group had lower adhesion scores [median (min-max ranges)] regarding extent, severity, and degree of the adhesions [0 (0-3), 0 (0-3) and 0 (0-3), respectively], which were significantly different (P < 0.001, P < 0.05 and P < 0.01, respectively) from those of the controls [1 (0-3), 2 (0-2) and 2 (0-3), respectively]; however, there were no statistically significant differences between rosiglitazone versus melatonin groups [1 (0-4), 2 (0-3) and 1 (0-3), respectively] and melatonin versus control groups. Moreover, no significant differences were determined between groups regarding histopathologic findings. CONCLUSION Rosiglitazone, but not melatonin, is effective in prevention of adhesion formation in a rat uterine horn model.
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Atta HM, Al-Hendy A, El-Rehany MA, Dewerchin M, Abdel Raheim SR, Abdel Ghany H, Fouad R. Adenovirus-mediated overexpression of human tissue plasminogen activator prevents peritoneal adhesion formation/reformation in rats. Surgery 2009; 146:12-7. [PMID: 19541005 DOI: 10.1016/j.surg.2009.02.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Accepted: 02/20/2009] [Indexed: 12/16/2022]
Abstract
BACKGROUND Tissue-plasminogen activator (tPA) demonstrated beneficial effects on peritoneal adhesion formation; however, its short half-life limits its continual fibrinolytic effect. Therefore, we delivered adenovirus encoding tPA to prevent adhesions. METHODS Rats were subjected to peritoneal injury and assigned to two protocols. In de novo adhesion protocol, adenovirus encoding human tPA gene (Ad-htPA) was instilled after peritoneal injury in group 1 (n = 22), whereas group 2 received phosphate-buffered saline (PBS) (n = 24). In recurrent adhesion protocol, group 1 (n = 15) received the same Ad-htPA dose after adhesiolysis and group 2 (n = 13) received PBS. Adhesion severity was scored 1 week after ad-htPA instillation. Adhesions were analyzed for htPA mRNA by reverse transcription-polymerase chain reaction and levels of htPA, and fibrinolytic inhibitors PAI-1, TIMP-1, and TGF-beta1 were measured using enzyme-linked immunosorbent assay. RESULTS htPA mRNA and protein were only expressed in adhesions from treated groups. A reduction in adhesion scores (P < .01) and in fibrinolytic inhibitors (P < .001) occurred in the treatment groups. Also, negative correlation was found (r = -.69, P < .01) between adhesion scores and htPA protein, but a positive correlation was found (r = .90, P < .01) between adhesion score and fibrinolytic inhibitors. No bleeding or wound complications were encountered. CONCLUSION Administration of adenovector encoding htPA is safe and decreased de novo and recurrent peritoneal adhesions.
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Affiliation(s)
- Hussein M Atta
- Department of Surgery, Faculty of Medicine, Minia University, El-Minia, Egypt.
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Jaenigen BM, Weis C, Odermatt EK, Hopt UT, Obermaier R. The new adhesion prophylaxis membrane A-part--from in vitro testing to first in vivo results. J Biomed Mater Res B Appl Biomater 2009; 89:293-299. [PMID: 18837454 DOI: 10.1002/jbm.b.31215] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
INTRODUCTION Formation of postoperative intra-abdominal adhesions is a severe problem in surgery. Apart from standard surgical procedures, a variety of different substances is available to prevent adhesions, but no universal method has been developed so far. A membrane consisting of polyvinyl alcohol (PVA) and carboxymethylcellulose (CMC) has been demonstrated to be antiadhesive. Here, the in vitro testing and first in vivo results in a rabbit sidewall model are reported. MATERIALS AND METHODS A-part membrane contains a PVA/CMC mixture in a thickness of 40 microm. The composition, dissolution, tensile strength, and elasticity were examined to characterize the membrane in vitro. Experiments in vivo were carried out using a 'rabbit sidewall model' in which a standardized peritoneal trauma was covered with a 5 x 6 cm A-part membrane. Adhesion formation in A-part-treated animals was compared with that in Adept (15 mL/kg body weight) and untreated controls. RESULTS An 80/20 PVA/CMC mixture forms a stable, elastic, transparent membrane, which can easily be placed intraoperatively. The dissolution shows a half-life of about 2 weeks [day 15: (45.1 +/- 4.9)% SD], which affords good adhesion protection during the initial critical phase of adhesion formation. In wet conditions, the membrane follows abdominal movements without tearing (tensile strength 5.0 +/- 4.2 N/cm SD; elasticity 29.5%). In a rabbit sidewall model, A-part membrane significantly reduced adhesion development by (83.1 +/- 31.5)% SD compared with the control and the Adept group (p < 0.001). CONCLUSION The properties of the A-part membrane suggest that it may be useful as an antiadhesive in surgery. A-part is effective in in vivo testing as determined in a rabbit sidewall model.
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Affiliation(s)
- Bernd Martin Jaenigen
- Department of General and Visceral Surgery, Albert-Ludwigs University of Freiburg, Freiburg, Germany
| | | | | | - Ulrich Theodor Hopt
- Department of General and Visceral Surgery, Albert-Ludwigs University of Freiburg, Freiburg, Germany
| | - Robert Obermaier
- Department of General and Visceral Surgery, Albert-Ludwigs University of Freiburg, Freiburg, Germany
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Ahmad G, Duffy JMN, Farquhar C, Vail A, Vandekerckhove P, Watson A, Wiseman D. Barrier agents for adhesion prevention after gynaecological surgery. Cochrane Database Syst Rev 2008:CD000475. [PMID: 18425865 DOI: 10.1002/14651858.cd000475.pub2] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Pelvic adhesion can form as a result of inflammation, endometriosis or surgical trauma. During pelvic surgery, strategies to reduce pelvic adhesion formation may include placing synthetic barrier agents such as oxidised regenerated cellulose, polytetrafluoroethylene or Fibrin sheets between the pelvic structures. OBJECTIVES To assess the effect of physical barriers used during pelvic surgery in women of reproductive age on pregnancy rates, pelvic pain, or postoperative adhesion reformation. SEARCH STRATEGY We searched the Cochrane Menstrual Disorders and Subfertility Group Trials Register (searched September 2007) which is based on regular searches of MEDLINE, EMBASE, CINAHL, PsycINFO and CENTRAL, plus handsearching of 20 relevant journals and conference proceedings, and searches of several key grey literature sources. In addition, companies were contacted for unpublished trials. SELECTION CRITERIA Any randomised controlled trials (RCTs) comparing the use of physical barriers versus no treatment or other physical barriers in the prevention of adhesions in women undergoing gynaecological surgery. DATA COLLECTION AND ANALYSIS Review authors assessed trial eligibility and quality. MAIN RESULTS Sixteen RCTs were included. Five trials randomised patients while the remainder randomised pelvic organs. Laparoscopy (six trials) and laparotomy (10 trials) were the primary surgical techniques. Indications for surgery included myomectomy (five trials), ovarian surgery (five trials), pelvic adhesions (four trials), endometriosis (one trial), and mixed (one trial). Eleven trials assessed Interceed versus no treatment, two assessed Interceed versus Gore-Tex, one trial assessed Gore-Tex versus no treatment, and one trial assessed Seprafilm versus no treatment. A single trial assessed Fibrin sheet versus no treatment. No studies reported pregnancy or reduction in pain as outcomes. The use of Interceed was associated with reduced incidence of pelvic adhesion formation, both new formation and reformation following laparoscopic surgery or laparotomy. However, this result should be interpreted with caution. Gore-Tex was more effective than no barrier or Interceed in preventing adhesion formation. There was only limited evidence that Seprafilm was effective in preventing adhesion formation following myomectomy and no evidence to support Fibrin sheet. AUTHORS' CONCLUSIONS The absorbable adhesion barrier Interceed reduces the incidence of adhesion formation following laparoscopy and laparotomy, but there are insufficient data to support its use to improve pregnancy rates. Gore-Tex may be superior to Interceed in preventing adhesion formation but its usefulness is limited by the need for suturing and later removal. There was no evidence of effectiveness of Seprafilm and Fibrin sheet in preventing adhesion formation.
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Affiliation(s)
- G Ahmad
- Stepping Hill Hospital, Obstetric & Gynaecology, 30 Badger Road, Altrincham, Cheshire, UK, WA14 5UZ.
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Abstract
Consequences and complications of postsurgical intra-abdominal adhesion formation not including small bowel obstruction and secondary infertility are substantial but are under-exposed in the literature. Inadvertent enterotomy during reopening of the abdomen or subsequent adhesion dissection is a feared complication of surgery after previous laparotomy. The incidence can be as high as 20% in open surgery and between 1% and 100% in laparoscopy depending on the underlying disease. Delayed postoperative detection of enterotomy is a particular feature of laparoscopy associated with significant morbidity and mortality. Adhesions to the ventral abdominal wall are responsible for the majority of trocar injuries. Both trocar injuries and inadvertent enterotomies result in conversion from laparoscopy to laparotomy in almost 100% of cases. There is a paucity of data on other organ injury, such as liver laceration or bladder perforation. Dissecting adhesions before executing the planned operation takes on average 20 min, being one-fifth of the total operating time in patients having had previous open colorectal surgery. There is some evidence that postoperative morbidity and mortality of patients who need adhesiolysis is higher than that of patients with a virgin abdomen. The necessity to dissect adhesions is associated with increased hospital stay. Postsurgical adhesions are considered a main reason for conversion from laparoscopy to laparotomy in many types of procedures including laparoscopic colonic resection. Adhesion formation is part of the innate peritoneal defence mechanism in peritonitis. Abscess formation and bleeding, organ injury and fistula formation at 'on demand' relaparotomies are well-known complications after surgery for intra-abdominal sepsis associated with fibrinous adhesions. The clinical magnitude hereof is poorly researched. Postsurgical adhesions may cause pain as evidenced by pain mapping clinical experiments. Filmy adhesions between movable organs and the peritoneum appear to be worse in terms of generating pain. The high caseload of gynaecological and some colorectal practices suggest an enormous impact of adhesion-related chronic abdominal and pelvic pain on patient's wellbeing and socio-economic costs. The significant risk of inadvertent enterotomy, conversion to laparotomy and trocar injury, and the associated postoperative morbidity and mortality and increased length of hospital stay warrant routine informed consent of adhesiolysis related complications in patients scheduled for abdominal or pelvic reoperation.
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Affiliation(s)
- H van Goor
- Department of Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Abstract
The extent of the problem of adhesions is considerable and poses a significant burden on healthcare systems, the workload of surgeons and the lives of patients. This paper reviews the work undertaken and the associated evidence for the impact of adhesions. It considers the various options and strategies to reduce adhesions alongside the fundamental necessity for good surgical technique.
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Affiliation(s)
- R Bhardwaj
- Department of Surgery, Darent Valley Hospital, Kent, UK
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Postoperative abdominal adhesions and their prevention in gynaecological surgery. Expert consensus position. Part 2—steps to reduce adhesions. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s10397-007-0333-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ergul E, Korukluoglu B. Peritoneal adhesions: facing the enemy. Int J Surg 2007; 6:253-60. [PMID: 17617231 DOI: 10.1016/j.ijsu.2007.05.010] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 05/10/2007] [Accepted: 05/24/2007] [Indexed: 11/21/2022]
Abstract
BACKGROUND Postsurgical adhesions severely affect the quality of life of millions of people worldwide. Numerous attempts have been made to prevent or reduce the incidence of peritoneal adhesions, but with limited success. DATA SOURCES An extensive Medline search, textbooks, scientific reports and scientific journals are the data sources. We also reviewed reference lists in all articles retrieved in the search as well as those of major texts regarding postsurgical intraperitoneal adhesion formation. CONCLUSIONS A multifactorial approach including minimizing tissue injury, prophylactic antibiotic usage to reduce infectious morbidity, and biochemical agents with or without biomechanical barriers will reduce the amount and severity of adhesions. However, further research is needed to establish the safety, effectiveness and also the cost/benefit ratio of these substances in human subjects.
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Affiliation(s)
- Emre Ergul
- Ankara Ataturk Teaching and Research Hospital, Bilkent, 06800 Ankara, Turkey.
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Wallwiener M, Brucker S, Hierlemann H, Brochhausen C, Solomayer E, Wallwiener C. Innovative barriers for peritoneal adhesion prevention: liquid or solid? A rat uterine horn model. Fertil Steril 2006; 86:1266-76. [PMID: 17008150 DOI: 10.1016/j.fertnstert.2006.05.023] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2005] [Revised: 05/29/2006] [Accepted: 05/29/2006] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To compare the effects of solid barriers (PDLA membrane and foil, Interceed), innovative barrier solutions (Adept and Hyalobarrier Gel, phospholipid emulsion), and Ringer's lactate solution in preventing postsurgical peritoneal adhesions in the rat. DESIGN Prospective, randomized experimental study. SETTING Rat model in an academic research environment. ANIMAL(S) Female, nonpregnant Wistar rats. INTERVENTION(S) Standardized surgical injuries were applied to the parietal and visceral peritoneum and the uterine horns. The barrier agents were applied and the wound was closed. A second-look laparoscopy was performed 31 days after surgery to assess adhesion formation. MAIN OUTCOME MEASURE(S) Severity and extent of adhesion formation assessed using a multidimensional adhesion scoring system. RESULT(S) Significantly fewer postsurgical adhesions were seen after treatment with Adept, Hyalobarrier Gel, Interceed, PDLA membrane, and phospholipid emulsion than after Ringer's lactate solution. Severe, clinically relevant adhesions were not observed after Hyalobarrier Gel and in only one animal after Adept. CONCLUSION(S) Both solid and liquid barriers can prevent adhesions. Hydroflotation formulas, such as Adept and Hyalobarrier Gel, avoid suture-induced adhesions, are easy to use, and their protective effects are evenly distributed. They are suitable for adhesion prevention after multifocal trauma in rats, and require further testing in the everyday clinical situation.
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Affiliation(s)
- Markus Wallwiener
- Department of Obstetrics and Gynaecology, University of Tuebingen, Tuebingen, Germany.
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Greene AK, Alwayn IPJ, Nose V, Flynn E, Sampson D, Zurakowski D, Folkman J, Puder M. Prevention of intra-abdominal adhesions using the antiangiogenic COX-2 inhibitor celecoxib. Ann Surg 2005; 242:140-6. [PMID: 15973112 PMCID: PMC1357715 DOI: 10.1097/01.sla.0000167847.53159.c1] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To determine the effects of COX-2 specific inhibitors on postoperative adhesion formation. SUMMARY AND BACKGROUND DATA Intra-abdominal adhesions are the major cause of intestinal obstruction and secondary infertility after surgical procedures. Because adhesion synthesis requires angiogenesis, and cyclooxygenase-2 enzyme (COX-2) inhibitors have antiendothelial activity, we tested COX-2 inhibitors in a murine model of intra-abdominal adhesion formation. METHODS A silicone patch was secured to the lateral abdominal wall of groups of C57BL/6 mice, followed by cecal abrasion to promote adhesion formation. Beginning on the day of surgery, mice were treated with the selective COX-2 agents, celecoxib or rofecoxib, and the nonspecific COX inhibitors, aspirin, naproxen, ibuprofen, or indomethacin. Animals were treated for 10 days and killed. A second group (celecoxib, rofecoxib, aspirin) was treated for 10 days and observed for an additional 25 days. After treatment, intra-abdominal adhesions were scored using a standard method. The patch was subjected to immunohistochemistry with the endothelial-specific marker, CD31. RESULTS Animals treated with selective and nonselective COX-2 inhibitors, except aspirin, had significantly fewer adhesions than control animals. Celecoxib produced a maximal reduction in adhesion formation compared with rofecoxib and the nonselective COX-2 inhibitors at 10 days. After 25 days, celecoxib and rofecoxib, but not aspirin, had fewer adhesions than control mice. Adhesions from mice treated with celecoxib had reduced microvessel density compared with rofecoxib, the nonselective COX inhibitors, and control animals. CONCLUSIONS Selective COX-2 inhibitors, in particular celecoxib, provide durable inhibition of intra-abdominal adhesions through an antiangiogenic mechanism.
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Affiliation(s)
- Arin K Greene
- Department of Surgery, Children's Hospital and Harvard Medical School, Boston, MA, USA
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Yin WY. Free peritoneal graft for repair of severe seromuscular defect of bowel: from experiment to clinical practice. J Surg Res 2005; 125:3-8. [PMID: 15836843 DOI: 10.1016/j.jss.2004.11.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2004] [Revised: 10/21/2004] [Accepted: 11/21/2004] [Indexed: 11/28/2022]
Abstract
BACKGROUND Severe seromuscular tear of the bowel with impending perforation following enterolysis or trauma is not uncommon in gastrointestinal surgery. It is sometimes complicated with enterocutaneous fistula, intra-abdominal abscess or free perforation, especially of the ileus. In addition, direct serosal repair is often impossible, or complicated by lumen compromise. Serosal patch repair also reportedly is also associated with complications such as dislodgement of the sutured bowel loop, fistula formation, adhesion ileus, or volvulus. Free peritoneal graft (FPG), as in split-thickness skin graft (STSG), can be taken by underlying healthy tissue within 24 to 48 h and used for repair of such defect. PATIENTS AND METHODS In this study, FPG was used as an alternative to serosal patch repair or resection to cover severe defects of the colon, rectum, duodenum, or small bowel in 30 consecutive patients. All defects were over 8 x 4 cm in size and involved 30 to 80% of the circumference of the bowel wall. Each defect was deep enough to expose the thin mucosal layer, with the intestinal content visible through it. These defects could have been successfully treated by resection or repair using a serosal or mucosal patch instead of FPG. After making sure that the mucosa associated with the defect was alive and not perforated, a patch of intact peritoneum with pre-peritoneal tissue from the lateral abdominal wall (slightly smaller than the defect) was superimposed, with the edges simply sewn to the margin of the defect. RESULTS All patients recovered uneventfully, with no untoward effects determined, even after long-term follow-up. CONCLUSION We believe that FPG provides a feasible, simple, effective, economic, and safe alternative for repair of severe seromuscular defects; potentially making it widely applicable in clinical practice.
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Affiliation(s)
- Wen-Yao Yin
- Department of Surgery, Tzu Chi University, Buddhist Dalin Tzu Chi General Hospital, Chia Yi, Taiwan.
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