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Carabotti M, Sgamato C, Amato A, Beltrame B, Binda GA, Germanà B, Leandro G, Pasquale L, Peralta S, Viggiani MT, Severi C, Annibale B, Cuomo R. Italian guidelines for the diagnosis and management of colonic diverticulosis and diverticular disease. Dig Liver Dis 2024:S1590-8658(24)00841-7. [PMID: 39004551 DOI: 10.1016/j.dld.2024.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 06/27/2024] [Accepted: 06/28/2024] [Indexed: 07/16/2024]
Abstract
Colonic diverticulosis and diverticular disease are among the most common gastrointestinal disorders encountered in clinical practice. These Italian guidelines focus on the diagnosis and management of diverticulosis and diverticular disease in the adult population, providing practical and evidence-based recommendations for clinicians. Experts from five Italian scientific societies, constituting a multidisciplinary panel, conducted a comprehensive review of meta-analyses, systematic reviews, randomised controlled trials, and observational studies to formulate 14 PICO questions. The assessment of the quality of the evidence and the formulation of the recommendations were carried out using an adaptation of the GRADE methodology. The guidelines covered the following topics: i) Management of diverticulosis; ii) Symptomatic uncomplicated diverticular disease: diagnosis and treatment; iii) Acute diverticulitis: diagnosis and treatment; iv) Management of diverticular disease complications; v) Prevention of recurrent acute diverticulitis; vi) Interventional management of diverticular disease.
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Affiliation(s)
- Marilia Carabotti
- Department of Medical-Surgical Sciences and Translational Medicine, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy.
| | - Costantino Sgamato
- Gastroenterology and Endoscopy Unit, "Sant'Anna e San Sebastiano" Hospital Caserta, 81100 Caserta, Italy
| | | | - Benedetta Beltrame
- Department of Technical-Health Care Professions Dietetics Unit- AUSL Toscana Centro Santa Maria Nuova Hospital, Italy
| | | | - Bastianello Germanà
- Gastroenterology and Digestive Endoscopy San Martino Hospital, Belluno, Italy
| | | | - Luigi Pasquale
- Gastroenterology and Digestive Endoscopy, Avellino, Italy
| | - Sergio Peralta
- UOS Diagnostic and Interventional Digestive Endoscopy AOU Policlinico P.Giaccone, Palermo, Italy
| | | | - Carola Severi
- Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Bruno Annibale
- Department of Medical-Surgical Sciences and Translational Medicine, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Rosario Cuomo
- Gastroenterology and Endoscopy Unit, "Sant'Anna e San Sebastiano" Hospital Caserta, 81100 Caserta, Italy
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Kollatos C, Sköldberg F, Graf W. Evaluation of laparoscopic peritoneal lavage for perforated diverticulitis: a national registry-based study. Br J Surg 2024; 111:znae109. [PMID: 38713610 PMCID: PMC11075766 DOI: 10.1093/bjs/znae109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 05/09/2024]
Abstract
BACKGROUND Laparoscopic lavage (LPL) has been suggested for treatment of non-feculent perforated diverticulitis. In this observational study, the surgical treatment of diverticular disease in Sweden outside prospective trials was investigated. METHODS This population-based study used the National Patient Register to identify all patients in Sweden with emergency admissions for diverticular disease, as defined by ICD codes from July 2014 to December 2020. Demographics, surgical procedures and outcomes were assessed. In addition, register data since 1997 were retrieved to assess co-morbidities, previous abdominal surgeries, and previous admissions for diverticular disease. RESULTS Among 47 294 patients with emergency hospital admission, 2035 underwent LPL (427 patients) or sigmoid resection (SR, 1608 patients) for diverticular disease. The mean follow-up was 30.8 months. Patients selected for LPL were younger, healthier and with less previous abdominal surgery for diverticular disease than those in the SR group (P < 0.01). LPL was associated with shorter postoperative hospital stay (mean 9.4 versus 14.9 days, P < 0.001) and lower 30-day mortality (3.5% versus 8.7%, P < 0.001). Diverticular disease-associated subsequent surgery was more common in the SR group than the LPL group except during the first year (P < 0.001). LPL had a lower mortality rate during the study period (stratified HR 0.70, 95% c.i. 0.53-0.92, P = 0.023). CONCLUSION Laparoscopic lavage constitutes a safe alternative to sigmoid resection for selected patients judged clinically to require surgery.
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Affiliation(s)
- Christos Kollatos
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
- Department of Surgery, Uppsala University Hospital, Uppsala, Sweden
| | - Filip Sköldberg
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
- Department of Surgery, Uppsala University Hospital, Uppsala, Sweden
| | - Wilhelm Graf
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
- Department of Surgery, Uppsala University Hospital, Uppsala, Sweden
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Azhar N, Lambrichts D, Lange J, Yaqub S, Øresland T, Schultz J, Bemelman W, Buchwald P. Laparoscopic lavage for Hinchey III perforated diverticulitis: factors for treatment failure in two randomized clinical trials. Br J Surg 2023; 110:846-851. [PMID: 37202860 PMCID: PMC10364520 DOI: 10.1093/bjs/znad114] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/20/2023] [Accepted: 04/11/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND The Scandinavian Diverticulitis (SCANDIV) trial and the LOLA arm of the LADIES trial randomized patients with Hinchey III perforated diverticulitis to laparoscopic peritoneal lavage or sigmoid resection. The aim of this analysis was to identify risk factors for treatment failure in patients with Hinchey III perforated diverticulitis. METHODS This was a post hoc analysis of the SCANDIV trial and LOLA arm. Treatment failure was defined as morbidity requiring general anaesthesia (Clavien-Dindo grade IIIb or higher) within 90 days. Age, sex, BMI, ASA fitness grade, smoking status, previous episodes of diverticulitis, previous abdominal surgery, time to surgery, and surgical competence were all tested in univariable and multivariable logistic regression analyses using an interaction variable. RESULTS The pooled analysis included 222 patients randomized to laparoscopic lavage and primary resection (116 and 106 patients respectively). Univariable analysis found ASA grade to be associated with advanced morbidity in both groups, and the following factors in the laparoscopic lavage group: smoking, corticosteroid use, and BMI. Significant factors for laparoscopic lavage morbidity in multivariable analysis were smoking (OR 7.05, 95 per cent c.i. 2.07 to 23.98; P = 0.002) and corticosteroid use (OR 6.02, 1.54 to 23.51; P = 0.010). CONCLUSION Active smoking status and corticosteroid use were risk factors for laparoscopic lavage treatment failure (advanced morbidity) in patients with perforated diverticulitis.
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Affiliation(s)
- Najia Azhar
- Department of Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Daniël Lambrichts
- Department of Surgery, Erasmus University Medical Centre, Rotterdam, The Netherlands
- Department of Surgery, University Medical Centre Amsterdam, AMC, Amsterdam, The Netherlands
| | - Johan Lange
- Department of Surgery, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Sheraz Yaqub
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway
| | - Tom Øresland
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Johannes Schultz
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Digestive Surgery, Akershus University Hospital, Lørenskog, Norway
| | - Willem Bemelman
- Department of Surgery, University Medical Centre Amsterdam, AMC, Amsterdam, The Netherlands
| | - Pamela Buchwald
- Department of Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
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Tiong J, Chen R, Phakey S, Abraham N. A Meta-Analysis of Short-Term Outcomes After Laparoscopic Lavage Versus Colonic Resection in the Treatment of Perforated Diverticulitis. Cureus 2023; 15:e34953. [PMID: 36938197 PMCID: PMC10018325 DOI: 10.7759/cureus.34953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2023] [Indexed: 02/16/2023] Open
Abstract
The management of perforated non-faeculent diverticulitis has traditionally involved performing a colonic resection (CR). Laparoscopic lavage (LL) has emerged as a less invasive alternative in recent years. The aim of this meta-analysis was to assess the role of LL in the surgical treatment of perforated non-faeculent diverticulitis. To that end, we conducted a search on Embase, Medline, and Cochrane databases for comparative studies in the English language published till June 2021 [PROSPERO (CRD42021269410)]. The risk of bias was assessed using the revised Cochrane risk-of-bias tool for randomised trials (RoB 2) and the methodological index for non-randomised studies (MINORS). Data were analysed using Cochrane RevMan. Pooled odds ratio (POR) and cumulative weighted ratios (CWR) were calculated. A total of 13 studies involving 1061 patients were found eligible, including seven studies based on three randomised control trials (RCTs). LL was associated with a reduced risk of wound infection, stoma formation, and need for further surgery by 77% [POR: 0.23, 95% confidence interval (CI): 0.07-0.74], 83% (POR: 0.17, 95% CI: 0.05-0.56), and 53% (POR: 0.47, 95% CI: 0.23-0.97) respectively. Duration of surgery and hospitalisation was reduced by 54% and 43% respectively. However, LL was associated with higher rates of unplanned reoperations (POR: 2.05, 95% CI: 1.22-3.42), recurrence (POR: 9.47, 95% CI: 3.24-27.67), and peritonitis (POR: 8.92, 95% CI: 2.71-29.33). No differences in mortality or readmission rates were observed. LL in Hinchey III diverticulitis lowers the incidence of stoma formation and overall reoperations without an increase in mortality but at the cost of higher recurrence rates and peritonitis. A limitation of this study was the inclusion of non-RCTs. An elective resection should be considered after LL. Guidelines for surgical techniques in LL need to be standardised.
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Affiliation(s)
| | - Rufi Chen
- General Surgery, Royal Melbourne Hospital, Melbourne, AUS
| | - Sachin Phakey
- General Surgery, Royal Melbourne Hospital, Melbourne, AUS
| | - Ned Abraham
- Faculty of Medicine, University of New South Wales Australia, Coffs Harbour, AUS
- Department of Colorectal Surgery, Baringa Private Hospital, Coffs Harbour, AUS
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Campana JP, Mentz RE, González Salazar E, González M, Moya Rocabado G, Vaccaro CA, Rossi GL. Long-term outcomes and risk factors for diverticulitis recurrence after a successful laparoscopic peritoneal lavage in Hinchey III peritonitis. Int J Colorectal Dis 2023; 38:18. [PMID: 36658230 DOI: 10.1007/s00384-023-04314-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/08/2023] [Indexed: 01/21/2023]
Abstract
PURPOSE Recently, treatment of Hinchey III diverticulitis by laparoscopic peritoneal lavage has been questioned. Moreover, long-term outcomes have been scarcely reported. Primary outcome was to determine the recurrence rate of diverticulitis after a successful laparoscopic peritoneal lavage in Hinchey III diverticulitis. Secondary outcomes were identification of associated risk factors for recurrence and elective sigmoidectomy rate. METHODS A retrospective cohort study in a tertiary referral center was performed. Patients with Hinchey III diverticulitis who underwent a successful laparoscopic peritoneal lavage between June 2006 and December 2019 were eligible. Diverticulitis recurrence was analyzed according to the Kaplan-Meier and log-rank test, censoring for death, loss of follow-up, or elective sigmoid resection in the absence of recurrence. Risk factors for recurrence were identified using Cox regression analysis. RESULTS Sixty-nine patients had a successful laparoscopic peritoneal lavage (mean age: 63 years; 53.6% women). Four patients had an elective sigmoid resection without recurrences. Recurrence rate was 42% (n = 29) after a median follow-up of 63 months. The cumulative global recurrence at 1, 3, and 5 years was 30% (95% CI, 20-43%), 37.5% (95% CI, 27-51%), and 48.9% (95% CI, 36-64%), respectively. Smoking (HR, 2.87; 95% CI, 1.22-6.5; p = 0.016) and episodes of diverticulitis prior to laparoscopic peritoneal lavage (HR, 5.2; 95% CI, 2.11-12.81; p < 0.001) were independently associated with an increased risk of recurrence. CONCLUSIONS Diverticulitis recurrence after a successful laparoscopic peritoneal lavage is high, decreasing after the first year of follow-up. Smoking and previous episodes of acute diverticulitis independently increase the risk of new episodes of diverticulitis.
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Affiliation(s)
- Juan P Campana
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Ricardo E Mentz
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Esteban González Salazar
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Marcos González
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Gabriel Moya Rocabado
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Carlos A Vaccaro
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina
| | - Gustavo L Rossi
- Section of Colorectal Surgery, Department of General Surgery, Hospital Italiano de Buenos Aires, Tte. Gral. Juan Domingo Perón 4190 St, Buenos Aires, C1199ABB, Argentina.
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Pavlidis ET, Pavlidis TE. Current Aspects on the Management of Perforated Acute Diverticulitis: A Narrative Review. Cureus 2022; 14:e28446. [PMID: 36176861 PMCID: PMC9509703 DOI: 10.7759/cureus.28446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2022] [Indexed: 02/05/2023] Open
Abstract
Unhealthy nutritional habits and the current western lifestyle have led to an increased incidence of acute diverticulitis, which mainly affects older patients. However, the disease course in younger patients might be more severe. It has a continued increase in surgical practice, as it is the most common clinical condition encountered in the emergencies. Diagnosis and management have changed over the past decade. C-reactive protein > 170 mg/L represents the cut-off point between moderate and severe diverticulitis, and a CT scan is mandatory. It demands urgent surgical management and has high morbidity and mortality rate, especially in immunosuppressed patients, reaching up to 25%. According to the contemporary guidelines, there have been certain indications for conservative management and re-evaluation (administration of antibiotics, CT-guided drainage of the abscess, when it is > 4 cm). They include pericolic air bubbles or a small amount of fluid, absence of abscess within a distance of 5 cm from the affected bowel or abscess ≤4 cm. In other cases, Hartmann's sigmoidectomy is the procedure of choice. An alternative choice, nowadays, is resection and primary anastomosis with or without diverting stoma, especially in younger patients. Laparoscopic lavage only versus primary resection has been performed in severe cases of Hinchey III or IV. Damage control surgery, possible open abdomen, and reoperation are recommended in severe sepsis. Hinchey's classification may not be absolutely adequate, and several modifications have been proposed. Current classification criteria (CRP, qSOFA score) are more appropriate. The decision-making must be individualized depending on the hemodynamic status (septic shock), age, comorbidity, immune status, intraoperative findings, and MPI (Mannheim peritonitis index).
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Affiliation(s)
- Efstathios T Pavlidis
- 2nd Surgical Propedeutic Department, Hippocration Hospital, Aristotle University of Thessaloniki, School of Medicine, Thessaloniki, GRC
| | - Theodoros E Pavlidis
- 2nd Surgical Propedeutic Department, Hippocration Hospital, Aristotle University of Thessaloniki, School of Medicine, Thessaloniki, GRC
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Di Fratta E, Mari G, Crippa J, Siracusa C, Costanzi A, Sassun R, Maggioni D, Fingerhut A. Distant free air is not a contraindication for definitive laparoscopic treatment of acute perforated diverticulitis: a multi-center experience. Updates Surg 2022; 74:1665-1673. [PMID: 35804223 DOI: 10.1007/s13304-022-01324-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 06/20/2022] [Indexed: 10/17/2022]
Abstract
The paradigm of emergency laparotomy with sigmoid resection and protective stoma has been challenged for perforated diverticular disease (PDD) with free extraluminal air. Early clinical stabilization could lead to interval laparoscopic resection without stoma within 2 weeks from perforation. Patients admitted for acute diverticulitis underwent abdominal computed tomography (CT) scan. When free air was seen, endoluminal enema was administred. All patients underwent assessement of clinical stability. In unstable patients, upfront emergency surgery was performed. Stable patients underwent a conservative management consisting in fasting, central line intravenous fluids, antibiotic therapy, pain management, O2 therapy and percutaneous radiological drainage when indicated. In successful conservative management early interval surgery was planned within 15 days. Early delayed definitive laparoscopic treatment (EDDLT) was defined as laparoscopic resection of the affected colon without ostomy. A total of 235 patients were admitted to the emergency department for PDD. Among these, 142 had pericolic free air and were excluded from the study. Ninety-three had distant free air. Thirty-seven were hemodynamically unstable and underwent upfront surgery. Fifty-six patients showed a clinical stability and started on EDDLT. EDDLT was successfully performed in 36 patients (64.3%). In 20 patients (35.7%) EDDLT was unsuccessful. At multivariate analysis, distant CT extravasation of endoluminal contrast was independently associated with unsuccessful EDDLT (OR 2.1, CI 0.94-5.32). Patients with distant extraluminal free air after PDD may be treated with early delayed surgery after intensive medical therapy. Distant spread of endoluminal contrast at CT was a risk factor for unsuccessful EDDLT often indicating fecal peritonitis.
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Affiliation(s)
| | - Giulio Mari
- General Surgery Unit, Hospital of Desio, ASST Brianza, Desio, MB, Italy
| | - Jacopo Crippa
- IRCCS Humanitas Research Hospital, ASST Melegnano-Martesana, Rozzano, Milan, Italy
| | - Claudia Siracusa
- Laboratory of Clinical Chemistry, Hospital of Desio, ASST-Brianza, Desio, MB, Italy
| | - Andrea Costanzi
- General Surgery Unit, Merate Hospital, ASST Lecco, Merate, LC, Italy
| | - Richard Sassun
- General Surgery Unit, Hospital of Desio, ASST Brianza, Desio, MB, Italy.
| | - Dario Maggioni
- General Surgery Unit, Hospital of Desio, ASST Brianza, Desio, MB, Italy
| | - Abe Fingerhut
- AIMS Academy Clinical Research Network, ASST Grande Ospedale Metropolitano Niguarda, Milan, MI, Italy
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Reinke CE, Lim RB. Minimally Invasive Acute Care Surgery. Curr Probl Surg 2021. [DOI: 10.1016/j.cpsurg.2021.101033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Reinke CE, Lim RB. Minimally invasive acute care surgery. Curr Probl Surg 2021; 59:101031. [DOI: 10.1016/j.cpsurg.2021.101031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 05/16/2021] [Indexed: 12/07/2022]
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Trejo-Avila M, Vergara-Fernández O. Open versus laparoscopic surgery for the treatment of diverticular colovesical fistulas: A systematic review and meta-analysis. ANZ J Surg 2021; 91:E570-E577. [PMID: 34056819 DOI: 10.1111/ans.16985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 05/12/2021] [Accepted: 05/15/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND The aim of this study was to analyze the evidence regarding open versus laparoscopic surgery for the treatment of diverticular colovesical fistula (CVF) in terms of perioperative outcomes. METHODS A systematic review was performed using PubMed, Cochrane, Google Scholar, and Web of Science databases for studies comparing laparoscopic versus open surgery for CVF. We pooled odds ratios (OR) and mean differences (MD) using random or fixed effects models. RESULTS Five non-randomized studies with 227 patients met the inclusion criteria. All were retrospective studies, published between 2014 and 2020. For laparoscopic surgery, the pooled rate for conversion to laparotomy was 36%. Laparoscopic and open procedures required similar operative time (MD: -11.62; 95% confidence interval [CI]: -51.41 to 28.16). No difference was found in terms of stoma rates between laparoscopic and open surgery (OR: 1.12; 95% CI 0.44-2.86). Overall, the rate of total postoperative complications was lower in the laparoscopic group (OR: 0.55; 95% CI: 0.30-0.99). The pooled analysis showed equivalent rates of anastomotic leaks (OR: 0.61; 95% CI 0.15-2.45), surgical site infections (OR: 0.44; 95% CI 0.19-1.01), and mortality (OR: 0.18; 95% CI 0.03-1.15). The length of stay was significantly reduced with laparoscopic surgery (MD: -2.89; 95% CI -4.20 to -1.58). CONCLUSION Among patients with CVF, the laparoscopic approach appears to have shorter hospital length of stay, with no differences in anastomotic leaks, surgical site infections, stoma rates, and mortality, when compared with open surgery.
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Affiliation(s)
- Mario Trejo-Avila
- Department of Colon and Rectal Surgery, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Omar Vergara-Fernández
- Department of Colon and Rectal Surgery, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
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