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| No. | Article Type | Article Title | Article Page |
|---|---|---|---|
| 1 | Clinical Research | Recommendation for Clinical T Staging in Patients with Non-Small Cell Lung Cancer: Volumetric Measurement: A Retrospective Study from Turkey | 51 - 57 |
| 2 | Commentary | Commentary: Volumetry for Lung Nodule Assessment | 58 - 59 |
| 3 | Case Report | Sternal Reconstruction with Titanium Prosthesis for Complicated Sternal Dehiscence with Right Ventricle Herniation after Cardiac Surgery: A Case Report | 60 - 64 |
| 4 | How-to-do-it | Balloon and Glue Technique: A Modification of Distal Reinforcement to Prevent Anastomotic New Entry, Reducing Replacement Range in Acute Type A Aortic Dissection | 65 - 69 |
| 5 | Commentary | Commentary: The Balloon and Glue Technique in Acute Type A Aortic Dissection: Considerations for Optimization and Clinical Application | 70 - 72 |
| 6 | Historical Note | Historical Perspectives of the Korean Society for Thoracic and Cardiovascular Surgery: Sung Nok Hong (1927–2017) Who Performed the First Coronary Artery Bypass Graft in Korea | 73 - 76 |
| 7 | Correction | Correction: Commentary: Is the Data Strong Enough to Prorocolize the Approach in Diaphragmatic Hernia Repair? Aspects of Technique and the Sample Size of a Longitudinal Single-Center Study | 77 - 77 |
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Korean J Thorac Cardiovasc Surg 2009; 42(5): 566-575
Published online October 5, 2009
Copyright © Journal of Chest Surgery.
Sungkyu Cho, M.D.*, Yong-Jin Kim, M.D.*, Soo Hwan Kim, B.S.**, Seung Hwa Choi, B.S.**
Departement of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul National University Hospital Clinical Research Institute, Xenotransplantation Research Center
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Background: The function of a bioprosthetic heart valve is determined largely by the material properties of the valve cusps. The uniaxial tensile test has been studied extensively. This type of testing, however, does not replicate the natural biaxial loading condition. The objective of the present study was to investigate the regional variability of the biaxial strain versus pressure relationship based on the types of fixation liquid models. Material and Method: Porcine aortic valves and pulmonary valves were assigned to three groups: the untreated fresh group, the fixed with glutaraldehyde (GA) group, and the glutaraldehyde with solvent (e.g., ethanol) group. For each group we measured the radial and circumferential stretch characteristics of the valve as a function of pressure change. Result: Radial direction elasticity of porcine aortic and pulmonary valves were better than circumferential direction elasticity in fresh, GA fixed, and GA＋solvent fixed groups (p=0.00). Radial and circumferential direction elasticity of pulmonary valves were better than aortic valves in GA fixed and GA+solvent fixed groups (p=0.00). Radial and circumferential direction elasticity of aortic valves were decreased after GA and GA＋solvent fixation (p=0.00), except for circumferential elasticity of GA＋solvent fixed valves (p=0.785). The radial (p=0.137) and circumferential (p=0.785) direction of elasticity of aortic valves were not significantly different between GA fixed and GA＋solvent fixed groups. Radial (p=0.910) and circumferential (p=0.718) direction of elasticity of pulmonary valve also showed no significant difference between GA fixed and GA＋solvent fixed groups. Conclusion: When fixing porcine valves with GA, adding a solvent does not cause a loss of mechanical properties, but, does not improve elasticity either. Radial direction elasticity of porcine aortic and pulmonary valves was better than circumferential direction elasticity. (Korean J Thorac Cardiovasc Surg 2009;42:566-575)
Keywords: 1. Xenograft, 2. Glutaraldehyde, 3. Heart valve prosthesis
Korean J Thorac Cardiovasc Surg 2009; 42(5): 566-575
Published online October 5, 2009
Copyright © Journal of Chest Surgery.
Sungkyu Cho, M.D.*, Yong-Jin Kim, M.D.*, Soo Hwan Kim, B.S.**, Seung Hwa Choi, B.S.**
Departement of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul National University Hospital Clinical Research Institute, Xenotransplantation Research Center
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Background: The function of a bioprosthetic heart valve is determined largely by the material properties of the valve cusps. The uniaxial tensile test has been studied extensively. This type of testing, however, does not replicate the natural biaxial loading condition. The objective of the present study was to investigate the regional variability of the biaxial strain versus pressure relationship based on the types of fixation liquid models. Material and Method: Porcine aortic valves and pulmonary valves were assigned to three groups: the untreated fresh group, the fixed with glutaraldehyde (GA) group, and the glutaraldehyde with solvent (e.g., ethanol) group. For each group we measured the radial and circumferential stretch characteristics of the valve as a function of pressure change. Result: Radial direction elasticity of porcine aortic and pulmonary valves were better than circumferential direction elasticity in fresh, GA fixed, and GA＋solvent fixed groups (p=0.00). Radial and circumferential direction elasticity of pulmonary valves were better than aortic valves in GA fixed and GA+solvent fixed groups (p=0.00). Radial and circumferential direction elasticity of aortic valves were decreased after GA and GA＋solvent fixation (p=0.00), except for circumferential elasticity of GA＋solvent fixed valves (p=0.785). The radial (p=0.137) and circumferential (p=0.785) direction of elasticity of aortic valves were not significantly different between GA fixed and GA＋solvent fixed groups. Radial (p=0.910) and circumferential (p=0.718) direction of elasticity of pulmonary valve also showed no significant difference between GA fixed and GA＋solvent fixed groups. Conclusion: When fixing porcine valves with GA, adding a solvent does not cause a loss of mechanical properties, but, does not improve elasticity either. Radial direction elasticity of porcine aortic and pulmonary valves was better than circumferential direction elasticity. (Korean J Thorac Cardiovasc Surg 2009;42:566-575)
Keywords: 1. Xenograft, 2. Glutaraldehyde, 3. Heart valve prosthesis
2010; 43(6): 627-634
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