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Rockholt MM, Naddi L, Badri AM, Englund E, Kander T. Macro- and microscopic changes in veins with short-term central venous catheters: an observational autopsy study. BMC Anesthesiol 2024; 24:5. [PMID: 38166620 PMCID: PMC10759750 DOI: 10.1186/s12871-023-02380-x] [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: 07/16/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Centrally inserted central catheters (CICCs) are indispensable in modern healthcare, but unfortunately, come with complications. Catheter-related thrombosis is a well-known complication reported to occur in 5-30% of patients with CICC. There is a paucity of studies that report the incidence of catheter-related thrombosis after the introduction of real-time ultrasound insertion guidance as clinical practice. This study aimed to demonstrate any pathological macro- or microscopic changes in the vein wall associated with CICCs. METHODS The study was approved by the Swedish Ethical Review Authority and was conducted at a large university hospital. The study included 12 patients with a short-term CICC who were subject to autopsies. Vessels with inserted catheters were macroscopically and microscopically examined. RESULTS In total, seven female and five male patients with a median age of 70 (interquartile range 63-76) were included. With one exception, all patients received routine thromboprophylaxis throughout the period with CICC. Most inserted CICCs were 9.5 French (54%) and were inserted in the internal jugular vein (92%). The median time with CICC was seven days (interquartile range 1.8-20). At autopsy, thrombi were observed in all cases (100%), macroscopically and microscopically, attached to the distal portion of the CICC and/or the adjacent vessel wall. Inflammatory changes in the vessel walls were seen in all cases, and varying degrees of fibrosis were demonstrated in eight cases (67%). CONCLUSIONS This autopsy study demonstrated that catheter-related thrombus formation with adjacent inflammatory and fibrotic vessel wall thickening was very common, despite a limited period of catheter use. The consequences of these findings are important, as thrombi may cause pulmonary embolism and possibly lead to catheter-related infections, and since inflammatory and fibrotic vessel wall thickening may evolve into chronic venous stenosis. Furthermore, the findings are a cause of concern, as CICCs are indispensable in modern healthcare and complications may be masked by the general disease that was the indication for CICC insertion.
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Affiliation(s)
- Mika M Rockholt
- Department of Intensive and Perioperative Care, Skåne University Hospital, 221 85, Lund, Sweden
- Department of Anesthesiology, Perioperative Care and Pain Medicine, NYU Langone Health, NYC, NY, USA
- Department of Clinical Sciences, Lund University, Box 117, 221 00, Lund, Sweden
| | - Leila Naddi
- Department of Intensive and Perioperative Care, Skåne University Hospital, 221 85, Lund, Sweden
- Department of Clinical Sciences, Lund University, Box 117, 221 00, Lund, Sweden
| | - Ahmed M Badri
- Department of Intensive and Perioperative Care, Skåne University Hospital, 221 85, Lund, Sweden
- Department of Anaesthesiology and Critical Care, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Elisabet Englund
- Department of Clinical Sciences, Lund University, Box 117, 221 00, Lund, Sweden
- Department of Genetics, Pathology and Molecular Diagnostics, Region Skåne, Sweden
| | - Thomas Kander
- Department of Intensive and Perioperative Care, Skåne University Hospital, 221 85, Lund, Sweden.
- Department of Clinical Sciences, Lund University, Box 117, 221 00, Lund, Sweden.
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2
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Kim SY, Aryal S, Yun WS, Kim WC, Moon SB, Chae GB, Key J, Kim S. Histologic evaluation of a catheter coated with paclitaxel PLGA nanoparticles in the internal jugular veins of rats. Biomed Eng Lett 2023; 13:505-514. [PMID: 37519876 PMCID: PMC10382362 DOI: 10.1007/s13534-023-00282-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 03/27/2023] [Accepted: 04/13/2023] [Indexed: 08/01/2023] Open
Abstract
The aim of this study is to investigate the potential impact of catheterization on intimal hyperplasia and explore the efficacy of Paclitaxel loaded PLGA nanoparticles (PTX-NPs) in preventing stenosis at the site of venous injury. Under general anesthesia, Central Venous Catheters were inserted into the rat's right internal jugular veins (IJV) using the cut-down technique. Twenty bare catheters (C) and twenty PTX-NPs coated catheters (P) were assigned to one of four groups (C2, C4, P2, or P4) based on catheter type and expected survival time. 2 or 4 weeks after surgery, IJVs were completely harvested by formalin fixation and gelatin infusion and slides were stained with H&E (Haematoxylin and Eosin) and Masson's technique. The P2 (Paclitaxel coating, 2 weeks) group showed the most proliferation among the four groups and the P4 (Paclitaxel coating, 4 weeks) showed a tendency to decrease proliferation. Additionally, the lumen size in the P4 group was about 6% smaller than in the P2 group, and there was a lower prevalence of stenotic grade in the P4 group. Our study suggests that PTX-NPs coated catheters may be effective in preventing venous stenosis if the intended usage is prolonged, rather than for a short-term period. Graphical abstract Schematic representation of catheter functionalization and coating of PTX-NPs on Catheter. Supplementary Information The online version contains supplementary material available at 10.1007/s13534-023-00282-y.
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Affiliation(s)
- Song-Yi Kim
- Department of Surgery, Chungnam National University Sejong Hospital, Sejong, Korea
| | - Susmita Aryal
- Department of Biomedical Engineering, Yonsei University, Wonju, Korea
| | - Wan Su Yun
- Department of Biomedical Engineering, Yonsei University, Wonju, Korea
| | - Woo Cheol Kim
- Department of Biomedical Engineering, Yonsei University, Wonju, Korea
| | - Suk-bae Moon
- Department of Surgery, College of Medicine, Kangwon National University, Chun-Cheon, Korea
| | - Gi-bong Chae
- Department of Surgery, College of Medicine, Kangwon National University, Chun-Cheon, Korea
| | - Jaehong Key
- Department of Biomedical Engineering, Yonsei University, Wonju, Korea
| | - Seongyup Kim
- Department of Surgery, College of Medicine, Yonsei University, Wonju, Korea
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3
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Chen JW, Hsu CC, Su CC, Hsu RB, Chiu YL, Chia JS, Jung CJ. Transient bacteremia promotes catheter-related central venous thrombosis through neutrophil extracellular traps. Thromb Haemost 2021; 122:1198-1208. [PMID: 34768303 DOI: 10.1055/a-1695-8612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Formation of intravenous catheter-related thrombosis leads to central venous stenosis in patients requiring renal replacement therapy or chemotherapy infusion, yet the triggering or mechanisms remain unclear, especially in patients without symptoms of infection. In this study, we found that neutrophil extracellular traps (NETs) could be detected in the fibrin sheaths from dialysis patients without clinical manifestations of infection. Confocal microscopy revealed bacteria imbedded in NETs in the fibrin sheaths. Thirty-nine of 50 (78%) fibrin sheath specimens contained bacteria detectable by 16S ribosomal RNA genome typing with a predominance of Staphylococcus aureus (69%). In rat models, transient bacteremia of S. aureus induced NETs in enlarged fibrin sheaths, and treatment with DNase I alone significantly reduced both NET and fibrin sheath formation surrounding the catheter. Therefore, transient bacteremia could be a silent trigger that induces NET-related immunothrombosis enhancing catheter-related central venous stenosis.
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Affiliation(s)
- Jeng-Wei Chen
- National Taiwan University Hospital, Department of Surgery, National Taiwan University College of Medicine, Taipei, Taiwan.,Graduate institute of clinical medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chih-Chieh Hsu
- School of Dentistry, Graduate Institute of Oral Biology, National Taiwan University, Taipei, Taiwan
| | - Chien-Chia Su
- National Taiwan University Hospital, Department of ophthalmology, National Taiwan University College of Medicine, Taipei, Taiwan.,Graduate institute of clinical medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ron-Bin Hsu
- National Taiwan University Hospital, Department of Surgery, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yen-Ling Chiu
- Graduate institute of clinical medicine, National Taiwan University College of Medicine, Taipei, Taiwan.,Department of Medicine, Division of Nephrology, Far Eastern Memorial Hospital, New Taipei City, Taiwan.,College of Informatics, Department of Computer Science and Engineering, Graduate Program in Biomedical Informatics, Yuan Ze University, Chung-Li, Taiwan
| | - Jean-San Chia
- Graduate institute of clinical medicine, National Taiwan University College of Medicine, Taipei, Taiwan.,Graduate Institute of Microbiology, National Taiwan University College of Medicine, Taipei, Taiwan.,School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chiau-Jing Jung
- College of Medicine, School of Medicine, Department of Microbiology and Immunology, Taipei Medical University, Taipei, Taiwan
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4
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Cellini M, Bergadano A, Crocoli A, Badino C, Carraro F, Sidro L, Botta D, Pancaldi A, Rossetti F, Pitta F, Cesaro S. Guidelines of the Italian Association of Pediatric Hematology and Oncology for the management of the central venous access devices in pediatric patients with onco-hematological disease. J Vasc Access 2020; 23:3-17. [PMID: 33169648 DOI: 10.1177/1129729820969309] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
INTRODUCTION Central venous accesses devices (CVADs) have a fundamental importance for diagnostic and therapeutic purposes in pediatric onco-hematological patients. The treatment of pediatric onco-hematological diseases is complex and requires the use of integrated multimodal therapies. Long-lasting and safe central venous access is therefore a cornerstone for any successful treatment. METHODS The aim of this work is to define pediatric guidelines about the management of CVADs in onco-hematology. A panel of experts belonging to the working groups on Infections and Supportive Therapy, Surgery and Nursing of the Italian Pediatric Hematology Oncology Association (AIEOP) revised the scientific literature systematically, scored the level of evidence and prepared these guidelines. The content of the following guidelines was approved by the Scientific Board of AIEOP. RESULTS AND CONCLUSIONS Important innovations have been developed recently in the field of CVADs, leading to new insertion methods, new materials and new strategy in the overall management of the device, especially in the adult population. These guidelines recommend how to apply these innovations in the pediatric population, and are directed to all physicians, nurses and health personnel active in the daily management of CVADs. Their aim is to update the knowledge on CVAD and improve the standard of care in pediatric patients with malignancies.
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Affiliation(s)
- Monica Cellini
- Pediatric Hematology Oncology Unit, Azienda Ospedaliero Universitaria Policlinico di Modena, Modena, Emilia-Romagna, Italy
| | - Anna Bergadano
- Paediatric Onco-Haematology, Stem Cell Transplantation and Cellular Therapy Division, Regina Margherita Children's Hospital, Torino, Piemonte, Italy
| | - Alessandro Crocoli
- Surgical Oncology Unit, Department of Surgery, Bambino Gesù Children's Hospital, IRCSS, Rome, Italy
| | - Clara Badino
- Pediatric Hematology and Oncology Unit, Giannina Gaslini's Children Hospital, Genova, Liguria, Italy
| | - Francesca Carraro
- Paediatric Onco-Haematology, Stem Cell Transplantation and Cellular Therapy Division, Regina Margherita Children's Hospital, Torino, Piemonte, Italy
| | - Luca Sidro
- Anesthesiology and Intensive Care Unit, AORN Santobono Pausillipon, Napoli, Campania, Italy
| | - Debora Botta
- Pediatric Unit Ospedale Santissima Annunziata di Savigliano, Savigliano, Piemonte, Italy
| | - Alessia Pancaldi
- Post Graduate School of Pediatrics, Department of Medical and Surgical Sciences of the Mothers, Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesca Rossetti
- Anesthesiology and Intensive Care Unit, Azienda Ospedaliero Universitaria Meyer, Firenze, Italy
| | - Federica Pitta
- Pediatric Hematology and Oncology Unit AORN Santobono Pausillipon, Napoli, Campania, Italy
| | - Simone Cesaro
- Pediatric Hematology and Oncology, Department of Mother and Child, Azienda Ospedaliera Universitaria Integrata, Verona, Veneto, Italy
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5
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Singha P, Goudie MJ, Liu Q, Hopkins S, Brown N, Schmiedt CW, Locklin J, Handa H. Multipronged Approach to Combat Catheter-Associated Infections and Thrombosis by Combining Nitric Oxide and a Polyzwitterion: a 7 Day In Vivo Study in a Rabbit Model. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9070-9079. [PMID: 32009376 PMCID: PMC7946114 DOI: 10.1021/acsami.9b22442] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The development of nonfouling and antimicrobial materials has shown great promise for reducing thrombosis and infection associated with medical devices with aims of improving device safety and decreasing the frequency of antibiotic administration. Here, the design of an antimicrobial, anti-inflammatory, and antithrombotic vascular catheter is assessed in vivo over 7 d in a rabbit model. Antimicrobial and antithrombotic activity is achieved through the integration of a nitric oxide donor, while the nonfouling surface is achieved using a covalently bound phosphorylcholine-based polyzwitterionic copolymer topcoat. The effect of sterilization on the nonfouling nature and nitric oxide release is presented. The catheters reduced viability of Staphylococcus aureus in long-term studies (7 d in a CDC bioreactor) and inflammation in the 7 d rabbit model. Overall, this approach provides a robust method for decreasing thrombosis, inflammation, and infections associated with vascular catheters.
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Affiliation(s)
- Priyadarshini Singha
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
| | - Marcus J Goudie
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
| | - Qiaohong Liu
- Department of Chemistry , The University of Georgia , Athens , Georgia 30602 , United States
| | - Sean Hopkins
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
| | - Nettie Brown
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
| | - Chad W Schmiedt
- College of Veterinary Medicine , The University of Georgia , Athens , Georgia 30602 , United States
| | - Jason Locklin
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
- Department of Chemistry , The University of Georgia , Athens , Georgia 30602 , United States
| | - Hitesh Handa
- School of Chemical, Materials and Biomedical Engineering , The University of Georgia , Athens , Georgia 30602 , United States
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6
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Fraga MV, Stoller JZ, Glau CL, De Luca D, Rempell RG, Wenger JL, Yek Kee C, Muhly WT, Boretsky K, Conlon TW. Seeing Is Believing: Ultrasound in Pediatric Procedural Performance. Pediatrics 2019; 144:peds.2019-1401. [PMID: 31615954 DOI: 10.1542/peds.2019-1401] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/31/2019] [Indexed: 11/24/2022] Open
Abstract
Point-of-care ultrasound is currently widely used across the landscape of pediatric care. Ultrasound machines are now smaller, are easier to use, and have much improved image quality. They have become common in emergency departments, ICUs, inpatient wards, and outpatient clinics. Recent growth of supportive evidence makes a strong case for using point-of-care ultrasound for pediatric interventions such as vascular access (in particular, central-line placement), lumbar puncture, fluid drainage (paracentesis, thoracentesis, pericardiocentesis), suprapubic aspiration, and soft tissue incision and drainage. Our review of this evidence reveals that point-of-care ultrasound has become a powerful tool for improving procedural success and patient safety. Pediatric patients and clinicians performing procedures stand to benefit greatly from point-of-care ultrasound, because seeing is believing.
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Affiliation(s)
| | | | - Christie L Glau
- Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania and Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, "A. Béclère" Medical Center, South Paris University Hospitals, Assistance Publique-Hôpitaux de Paris, Paris, France.,Physiopathology and Therapeutic Innovation Unit, Institut National de la Santé et de la Recherche Médicale U999, South Paris-Saclay University, Paris, France
| | | | - Jesse L Wenger
- Division of Pediatric Critical Care Medicine, University of Washington and Seattle Children's Hospital, Seattle, Washington
| | - Chor Yek Kee
- Department of Pediatrics, Sarawak General Hospital, Sarawak, Malaysia; and
| | - Wallis T Muhly
- Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania and Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Karen Boretsky
- Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Harvard University and Boston Children's Hospital, Boston, Massachusetts
| | - Thomas W Conlon
- Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania and Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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7
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Kim D, Moon SB. Letter to the Editor. J Pediatr Surg 2019; 54:210. [PMID: 30449606 DOI: 10.1016/j.jpedsurg.2018.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 09/03/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Duhyeong Kim
- Department of Health Management and Policy, Kangwon National University School of Medicine, Chuncheon, South Korea
| | - Suk Bae Moon
- Department of Surgery, Kangwon National University School of Medicine, Chuncheon, South Korea.
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8
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Han SB, Kim D, Moon SB. Letter to the Editor. J Pediatr Surg 2018; 53:1080. [PMID: 29499846 DOI: 10.1016/j.jpedsurg.2018.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 01/07/2018] [Indexed: 10/18/2022]
Affiliation(s)
- Sang Beom Han
- Department of Ophthalmology, Kangwon National University School of Medicine, Chuncheon, South Korea
| | - Duhyeong Kim
- Department of Health Management and Policy, Kangwon National University School of Medicine, Chuncheon, South Korea
| | - Suk Bae Moon
- Department of Surgery, Kangwon National University School of Medicine, Chuncheon, 24341, South Korea.
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Keiler J, Schulze M, Sombetzki M, Heller T, Tischer T, Grabow N, Wree A, Bänsch D. Neointimal fibrotic lead encapsulation - Clinical challenges and demands for implantable cardiac electronic devices. J Cardiol 2017; 70:7-17. [PMID: 28583688 DOI: 10.1016/j.jjcc.2017.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 01/16/2017] [Indexed: 01/09/2023]
Abstract
Every tenth patient with a cardiac pacemaker or implantable cardioverter-defibrillator implanted is expected to have at least one lead problem in his lifetime. However, transvenous leads are often difficult to remove due to thrombotic obstruction or extensive neointimal fibrotic ingrowth. Despite its clinical significance, knowledge on lead-induced vascular fibrosis and neointimal lead encapsulation is sparse. Although leadless pacemakers are already available, their clinical operating range is limited. Therefore, lead/tissue interactions must be further improved in order to improve lead removals in particular. The published data on the coherences and issues related to lead associated vascular fibrosis and neointimal lead encapsulation are reviewed and discussed in this paper.
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Affiliation(s)
- Jonas Keiler
- Department of Anatomy, Rostock University Medical Center, Rostock, Germany.
| | - Marko Schulze
- Department of Anatomy, Rostock University Medical Center, Rostock, Germany
| | - Martina Sombetzki
- Department for Tropical Medicine and Infectious Diseases, Rostock University Medical Center, Rostock, Germany
| | - Thomas Heller
- Institute of Diagnostic and Interventional Radiology, Rostock University Medical Center, Rostock, Germany
| | - Tina Tischer
- Heart Center Rostock, Department of Internal Medicine, Divisions of Cardiology, Rostock University Medical Center, Rostock, Germany
| | - Niels Grabow
- Institute for Biomedical Engineering, Rostock University Medical Center, Rostock, Germany
| | - Andreas Wree
- Department of Anatomy, Rostock University Medical Center, Rostock, Germany
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Kim S, Kim Y, Hwang JW, Moon SB. Inhibitory effect of sustained perivascular delivery of paclitaxel on neointimal hyperplasia in the jugular vein after open cutdown central venous catheter placement in rats. Ann Surg Treat Res 2017; 92:97-104. [PMID: 28203557 PMCID: PMC5309183 DOI: 10.4174/astr.2017.92.2.97] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 11/30/2022] Open
Abstract
PURPOSE Inhibitory effect of paclitaxel on neointimal hyperplasia after open cutdown has not been elucidated. METHODS For the control group (n = 16), silicone 2.7-Fr catheters were placed via the right external jugular vein with the cutdown method. For the treatment group (n = 16), a mixture of 0.65 mg of paclitaxel and 1 mL of fibrin glue was infiltrated around the exposed vein after cutdown. After scheduled intervals (1, 2, 4, and 8 weeks), the vein segment was harvested and morphometric analysis was performed on cross-sections. RESULTS Proliferation of smooth muscle cell (SMC) was strongly suppressed in the treatment group, and the ratio of neointima to vein wall was significantly reduced in the treatment group (8 weeks; 0.63 ± 0.08 vs. 0.2 ± 0.08, P < 0.05). Luminal patency was significantly more preserved in the treatment group, and the luminal area was significantly wider in the paclitaxel-treated group compared to the control group (8 weeks; 1.91 ± 0.43 mm2 vs. 5.1 ± 0.43 mm2, P < 0.05). Mean SMC counts measured at 1 and 2 weeks after cutdown were significantly lower in the treatment group (2 weeks; 115 ± 22 vs. 62 ± 22). Paclitaxel was undetectable in systemic circulation (<10 ng/mL). CONCLUSION Sustained perivascular delivery of paclitaxel with fibrin glue was effective in inhibiting neointimal hyperplasia in rat jugular vein after open cutdown.
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Affiliation(s)
- Seongyup Kim
- Department of General Surgery, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Younglim Kim
- Department of Surgery, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Ji Woong Hwang
- Department of Surgery, Eulji University Hospital, Daejeon, Korea
| | - Suk-Bae Moon
- Department of Surgery, Kangwon National University School of Medicine, Chuncheon, Korea
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