1
|
Fan S, Chen G, Zhang K, Zhao L, Yuan H, Wu J, Gao W, Wei J, Xi C, Guo F, Chen J, Lu Z, Jiang K, Miao Y, Xiao B. The incidence and risk factors of marginal ulcers in the short and medium term in symptomatic post-pancreaticoduodenectomy patients ---- single-center experience. Am J Surg 2024:S0002-9610(24)00114-4. [PMID: 38369416 DOI: 10.1016/j.amjsurg.2024.02.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/04/2024] [Accepted: 02/12/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Marginal ulcer (MU) is one of the postoperative complications of pancreaticoduodenectomy (PD), which needs particular attention in postoperative treatments. METHODS The data of 190 patients who underwent PD and follow-up gastroscopic review due to upper GI symptoms within two years were retrospectively analyzed. The incidence of MU and risk factors were analyzed based on personal history, surgical procedure, past medical history, postoperative complications, and other relevant indicators. RESULTS The proportion of MU in patients who underwent endoscopic follow-up for upper gastrointestinal symptoms in the postoperative period in this cohort was 10.5% (20/190). Advanced age (69y vs. 59y, P = 0.012), alcohol consumption (20% vs. 8.2%, P = 0.03), and cigarette smoking (35% vs. 14.7%, P = 0.022) were associated with an increased incidence of MU. Longer surgery time (276.5min vs. 240min, P = 0.049), postoperative bleeding (10% vs. 1.8%, P = 0.030), and failure to take antacid regularly postoperatively (75% vs. 97.1%, P = 0.000) would increase the risk of MU; taking antacid regularly was an independent protective factor for postoperative anastomotic ulceration (OR: 0.091, CI: 0.022-0.383, P = 0.001). CONCLUSION Advanced age, alcohol consumption, smoking, longer operation time, or postoperative extraluminal hemorrhage are associated with MU. Regular use of antacids is an independent protective factor against the development of MU.
Collapse
Affiliation(s)
- Shaoqin Fan
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Guosheng Chen
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Kai Zhang
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Li Zhao
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Hao Yuan
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Junli Wu
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Wentao Gao
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Jishu Wei
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Chunhua Xi
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Feng Guo
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Jianmin Chen
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Zipeng Lu
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Kuirong Jiang
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yi Miao
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Bin Xiao
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| |
Collapse
|
2
|
Boyev A, Prakash LR, Chiang YJ, Childers CP, Jain AJ, Newhook TE, Bruno ML, Arvide EM, Dewhurst WL, Kim MP, Ikoma N, Lee JE, Snyder RA, Katz MHG, Tzeng CWD, Maxwell JE. Postoperative Opioid Use Is Associated with Increased Rates of Grade B/C Pancreatic Fistula After Distal Pancreatectomy. J Gastrointest Surg 2023; 27:2135-2144. [PMID: 37468733 DOI: 10.1007/s11605-023-05751-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/03/2023] [Indexed: 07/21/2023]
Abstract
BACKGROUND Clinically relevant postoperative pancreatic fistula (CR-POPF) is a major source of morbidity after distal pancreatectomy. This study examined the association between postoperative opioid use and CR-POPF in the context of opioid-sparing postoperative care. METHODS A case-control study was performed on consecutive patients who underwent distal pancreatectomy between October 2016 and April 2022 at a single institution. Patients who developed CR-POPF were compared to controls. Multivariable regression modeling was used to identify factors associated with CR-POPF. RESULTS A total of 281 patients underwent 187 open, 20 laparoscopic, and 74 robotic-assisted operations. The rate of CR-POPF was 21% (n = 58). CR-POPF rate declined from 32 to 8% over the study period (p < 0.001). Median oral morphine equivalents (OME) administered on POD 0-1 and 0-3 were 94 and 129 mg, respectively, in patients who did not develop a fistula versus 130 and 180 mg in those who did (both p ≤ 0.001). POD 0-3 OME (OR 1.11, p = 0.044) was independently associated with increased odds of CR-POPF, with each additional 50 mg (equivalent to 10 tramadol pills) increasing the relative risk by 11% and absolute risk by 2%. CONCLUSION Early postoperative opioid use after distal pancreatectomy was associated with increased odds of CR-POPF. Decreasing perioperative opioid use through enhanced postoperative management is a low-cost and generalizable approach that may reduce rates of CR-POPF after distal pancreatectomy.
Collapse
Affiliation(s)
- Artem Boyev
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Laura R Prakash
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Yi-Ju Chiang
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Christopher P Childers
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Anish J Jain
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Timothy E Newhook
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Morgan L Bruno
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Elsa M Arvide
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Whitney L Dewhurst
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Michael P Kim
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Naruhiko Ikoma
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Jeffrey E Lee
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Rebecca A Snyder
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Matthew H G Katz
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Ching-Wei D Tzeng
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Jessica E Maxwell
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA.
| |
Collapse
|
3
|
Abstract
BACKGROUND Postoperative pancreatic fistula (POPF) is one of the most frequent and potentially life-threatening complications following pancreatic surgery. Fibrin sealants have been used in some centres to reduce POPF rate. However, the use of fibrin sealant during pancreatic surgery is controversial. This is an update of a Cochrane Review last published in 2020. OBJECTIVES To evaluate the benefits and harms of fibrin sealant use for the prevention of POPF (grade B or C) in people undergoing pancreatic surgery compared to no fibrin sealant use. SEARCH METHODS We searched CENTRAL, MEDLINE, Embase, two other databases, and five trials registers on 09 March 2023, together with reference checking, citation searching, and contacting study authors to identify additional studies. SELECTION CRITERIA We included all randomised controlled trials (RCTs) that compared fibrin sealant (fibrin glue or fibrin sealant patch) versus control (no fibrin sealant or placebo) in people undergoing pancreatic surgery. DATA COLLECTION AND ANALYSIS We used standard methodological procedures expected by Cochrane. MAIN RESULTS We included 14 RCTs, randomising 1989 participants, comparing fibrin sealant use versus no fibrin sealant use for different locations: stump closure reinforcement (eight trials), pancreatic anastomosis reinforcement (five trials), or main pancreatic duct occlusion (two trials). Six RCTs were carried out in single centres; two in dual centres; and six in multiple centres. One RCT was conducted in Australia; one in Austria; two in France; three in Italy; one in Japan; two in the Netherlands; two in South Korea; and two in the USA. The mean age of the participants ranged from 50.0 years to 66.5 years. All RCTs were at high risk of bias. Application of fibrin sealants to pancreatic stump closure reinforcement after distal pancreatectomy We included eight RCTs involving 1119 participants: 559 were randomised to the fibrin sealant group and 560 to the control group after distal pancreatectomy. Fibrin sealant use may result in little to no difference in the rate of POPF (risk ratio (RR) 0.94, 95% confidence interval (CI) 0.73 to 1.21; 5 studies, 1002 participants; low-certainty evidence) and overall postoperative morbidity (RR 1.20, 95% CI 0.98 to 1.48; 4 studies, 893 participants; low-certainty evidence). After fibrin sealant use, approximately 199 people (155 to 256 people) out of 1000 developed POPF compared with 212 people out of 1000 when no fibrin sealant was used. The evidence is very uncertain about the effect of fibrin sealant use on postoperative mortality (Peto odds ratio (OR) 0.39, 95% CI 0.12 to 1.29; 7 studies, 1051 participants; very low-certainty evidence) and total length of hospital stay (mean difference (MD) 0.99 days, 95% CI -1.83 to 3.82; 2 studies, 371 participants; very low-certainty evidence). Fibrin sealant use may reduce the reoperation rate slightly (RR 0.40, 95% CI 0.18 to 0.90; 3 studies, 623 participants; low-certainty evidence). Serious adverse events were reported in five studies (732 participants), and there were no serious adverse events related to fibrin sealant use (low-certainty evidence). The studies did not report quality of life or cost-effectiveness. Application of fibrin sealants to pancreatic anastomosis reinforcement after pancreaticoduodenectomy We included five RCTs involving 519 participants: 248 were randomised to the fibrin sealant group and 271 to the control group after pancreaticoduodenectomy. The evidence is very uncertain about the effect of fibrin sealant use on the rate of POPF (RR 1.34, 95% CI 0.72 to 2.48; 3 studies, 323 participants; very low-certainty evidence), postoperative mortality (Peto OR 0.24, 95% CI 0.05 to 1.06; 5 studies, 517 participants; very low-certainty evidence), reoperation rate (RR 0.74, 95% CI 0.33 to 1.66; 3 studies, 323 participants; very low-certainty evidence), and total hospital cost (MD -1489.00 US dollars, 95% CI -3256.08 to 278.08; 1 study, 124 participants; very low-certainty evidence). After fibrin sealant use, approximately 130 people (70 to 240 people) out of 1000 developed POPF compared with 97 people out of 1000 when no fibrin sealant was used. Fibrin sealant use may result in little to no difference both in overall postoperative morbidity (RR 1.02, 95% CI 0.87 to 1.19; 4 studies, 447 participants; low-certainty evidence) and in total length of hospital stay (MD -0.33 days, 95% CI -2.30 to 1.63; 4 studies, 447 participants; low-certainty evidence). Serious adverse events were reported in two studies (194 participants), and there were no serious adverse events related to fibrin sealant use (very low-certainty evidence). The studies did not report quality of life. Application of fibrin sealants to pancreatic duct occlusion after pancreaticoduodenectomy We included two RCTs involving 351 participants: 188 were randomised to the fibrin sealant group and 163 to the control group after pancreaticoduodenectomy. The evidence is very uncertain about the effect of fibrin sealant use on postoperative mortality (Peto OR 1.41, 95% CI 0.63 to 3.13; 2 studies, 351 participants; very low-certainty evidence), overall postoperative morbidity (RR 1.16, 95% CI 0.67 to 2.02; 2 studies, 351 participants; very low-certainty evidence), and reoperation rate (RR 0.85, 95% CI 0.52 to 1.41; 2 studies, 351 participants; very low-certainty evidence). Fibrin sealant use may result in little to no difference in the total length of hospital stay (median 16 to 17 days versus 17 days; 2 studies, 351 participants; low-certainty evidence). Serious adverse events were reported in one study (169 participants; low-certainty evidence): more participants developed diabetes mellitus when fibrin sealants were applied to pancreatic duct occlusion, both at three months' follow-up (33.7% fibrin sealant group versus 10.8% control group; 29 participants versus 9 participants) and 12 months' follow-up (33.7% fibrin sealant group versus 14.5% control group; 29 participants versus 12 participants). The studies did not report POPF, quality of life, or cost-effectiveness. AUTHORS' CONCLUSIONS Based on the current available evidence, fibrin sealant use may result in little to no difference in the rate of POPF in people undergoing distal pancreatectomy. The evidence is very uncertain about the effect of fibrin sealant use on the rate of POPF in people undergoing pancreaticoduodenectomy. The effect of fibrin sealant use on postoperative mortality is uncertain in people undergoing either distal pancreatectomy or pancreaticoduodenectomy.
Collapse
Affiliation(s)
- Mingliang Lai
- Department of Clinical Laboratory, Chongqing University Jiangjin Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Shiyi Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Sirong He
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Yao Cheng
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Nansheng Cheng
- Department of Bile Duct Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Yilei Deng
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiong Ding
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| |
Collapse
|
4
|
Jarząbek R, Greberski K, Bugajski P. Autologous fibrin sealant application in cardiac surgery - a single-centre observational study. Kardiochir Torakochirurgia Pol 2021; 18:75-9. [PMID: 34386047 DOI: 10.5114/kitp.2021.107467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/11/2021] [Indexed: 11/17/2022]
Abstract
Introduction To minimize the risk of blood loss and post-transfusion complications in patients undergoing cardiovascular surgery, different strategies are used. Aim To analyse the efficacy of the intraoperative use of autologous fibrin glue to seal suture lines of cardiac and vascular structures. Material and methods The early results of 62 patients who underwent complex cardiac operations in extracorporeal circulation were analysed. In a half of them Vivostat autologous fibrin sealant in addition to the routine haemostatic agents was applied (study group), whereas in the second group (matched-pair control group) only standard haemostatics were used. Among many other factors, special attention was paid to postoperative drainage and blood products used. Results The mean age of the patients and prevalence of comorbidities did not differ between groups. Generally, in the study group fewer haemostatic agents were used. For example, Preveleak tissue glue was applied in 3.2% of studied cases compared to one third of control patients (p = 0.008). The thoracic drainage on either day 0 or day 1 was also similar. The number of patients who received blood products did not differ between groups. More importantly, there were no significant differences in in-hospital mortality and prevalence of other postoperative complications. Conclusions In this study it was found that application of autologous fibrin glue was safe and might limit use of standard haemostatic agents. Taking into account the lack of potential threats related to the transmission of infections and immune responses, it may be an interesting alternative to the previously used local haemostatics.
Collapse
|
5
|
Serra F, Bonaduce I, Rossi EG, De Ruvo N, Cautero N, Gelmini R. The using of sealants in pancreatic surgery: A Systematic Review. Ann Med Surg (Lond) 2021; 64:102244. [PMID: 33898024 PMCID: PMC8053887 DOI: 10.1016/j.amsu.2021.102244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/15/2021] [Accepted: 03/18/2021] [Indexed: 12/03/2022] Open
Abstract
Background POPF derives from the pancreatic stump, which follows pancreatic resection and the pancreatoenteric anastomosis following pancreaticoduodenectomy. Since 1978 sealants have been used in pancreatic surgery to prevent pancreatic fistula after resection of the pancreatic head and tail or for the management of trauma and the treatment of low-output pancreatic fistula. Different types of fibrin sealants have been evaluated for their potential to reduce the occurrence of POPF. Methods A systematic search of the electronic literature was performed using PubMed, Cochrane Library, and Scopus databases to obtain access to all publications, especially clinical trials, randomised controlled trials, and systematic reviews concerning fibrin sealants pancreatic surgery. Searching for “fibrin sealants pancreas,” we found a total of 73 results on Pubmed, 61 on Scopus, and 14 on Cochrane Library (148 total results). Results Eighteen studies were found on literature, following the criteria already described, concerning the use of fibrin sealants in pancreatic surgery. All articles described were published in the period between 1989 and 2019. Most of these were single centre studies. A total of 1032 patients were enrolled in this review. In the studies, sealants were used to reinforce pancreatic anastomoses and for the occlusion of the main pancreatic duct. Conclusion CR-POPF is a fearful complication of pancreatic surgery; among the possible solutions to reduce the risk of onset, sealants were used on the pancreatic stump; today the sealants should be considered such as an option to reduce the CR-POPF, but the routine use in clinical practice has to be validated. Discuss the use of sealants in pancreatic surgery. Compare the application of sealants on pancreatic stump and the effect on p-popf Describe the previous experiences reported in literature.
Collapse
Affiliation(s)
- Francesco Serra
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| | - Isabella Bonaduce
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| | - Elena Giulia Rossi
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| | - Nicola De Ruvo
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| | - Nicola Cautero
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| | - Roberta Gelmini
- Department of Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Via del Pozzo, 71 41100, Modena, Italy
| |
Collapse
|
6
|
Luu AM, Vogel SR, Braumann C, Praktiknjo M, Höhn P, Förster S, Janot M, Uhl W, Belyaev O. Risk factors for perforated marginal ulcers following pancreaticoduodenectomy and prospective analysis of marginal ulcer development. Gland Surg 2021; 10:739-750. [PMID: 33708556 DOI: 10.21037/gs-20-763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Perforated marginal ulcers (PMUs) are a feared long-term complication following pancreaticoduodenectomy (PD), which always require relaparotomy compared to marginal ulcers. Methods First, we performed a retrospective chart review for all patients who underwent PD from 2007-2016 to identify incidence and risk factors associated with PMUs. Second, we analyzed follow up gastroscopies in all patients undergoing PD from 2007-2011 to identify the overall incidence of marginal ulcers. Results A total of 725 patients underwent PD in the retrospective study period. 17 patients (2.3%) suffered from PMU at a median postoperative time of 13 months. These patients were significantly younger (median age: 49 vs. 62 years; P=0.02) and suffered most often from chronic pancreatitis (P<0.001). Smoking and alcohol consumption were significantly more common (P=0.01 and P=0.023). An elevated level of carcinoembryonic antigen and chronic pancreatitis were identified as independent risk factors. Overall, 373 patients were enrolled for prospective analysis. Marginal ulcers occurred in 5-5.9% over a postoperative period of 5 years. Conclusions Continuous treatment with proton-pump inhibitors for at least 5 years, immediate smoking cessation and follow-up gastroscopies are obligate for patients undergoing PD to avoid marginal ulcers and PMUs.
Collapse
Affiliation(s)
- Andreas Minh Luu
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Sina Rabea Vogel
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Chris Braumann
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Michael Praktiknjo
- Department of Internal Medicine, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - Philipp Höhn
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Sarah Förster
- Department of Pathology, University-Hospital Bergmannsheil, Bürkle de la Camp Platz 1, 44789 Bochum, Germany
| | - Monika Janot
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Waldemar Uhl
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Orlin Belyaev
- Department of General and Visceral Surgery, St. Josef Hospital, Ruhr-University Bochum, Gudrunstrasse 56, 44791 Bochum, Germany
| |
Collapse
|