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Ruppelt A, Pijnenburg I, Pappers C, Samsom RA, Kock L, Grinwis GCM, Spee B, Rasponi M, Stijnen M. Are slaughterhouse-obtained livers suitable for use in ex vivo perfusion research? J Int Med Res 2023; 51:3000605231189651. [PMID: 37565647 PMCID: PMC10422909 DOI: 10.1177/03000605231189651] [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: 03/17/2023] [Accepted: 07/06/2023] [Indexed: 08/12/2023] Open
Abstract
OBJECTIVES The success of the ex vivo machine perfusion of pig livers used for preclinical research depends on organ quality and availability. In this study, we investigated whether livers obtained from slaughterhouses are suitable and equivalent to livers obtained from laboratory pigs. METHODS Livers were obtained from slaughterhouse pigs stunned by electrocution or CO2 inhalation and from laboratory pigs. For the latter group, 45 minutes of warm ischemia was mimicked for a subgroup, ensuring a valid comparison with slaughterhouse-derived livers. RESULTS Livers from CO2-stunned pigs showed lower indocyanine green clearance and bile production, higher blood lactate and potassium concentrations, and higher alanine aminotransferase activities than electrically stunned pigs. Furthermore, livers from electrically stunned pigs, and livers from laboratory pigs, subjected or not to warm ischemia, showed similar performance in terms of perfusion and metabolism. CONCLUSION For an ex vivo liver model generated using slaughterhouse pigs, electrical stunning is preferable to CO2 stunning. Livers from electrically stunned slaughterhouse pigs performed similarly to laboratory pig livers. These findings support the use of livers from electrically stunned slaughterhouse pigs, which may therefore provide an alternative to livers obtained from laboratory pigs, consistent with the principle of the 3Rs.
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Affiliation(s)
- Alicia Ruppelt
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
- LifeTec Group, Eindhoven, The Netherlands
| | | | | | - Roos-Anne Samsom
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Linda Kock
- LifeTec Group, Eindhoven, The Netherlands
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Guy C. M. Grinwis
- Veterinary Pathology Diagnostic Centre, Department of Biomedical Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Bart Spee
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Marco Rasponi
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
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Zhang L, Xue FS, Tian M, Zhu ZJ. Elevated effluent potassium concentrations predict the development of postreperfusion hyperkalemia in deceased liver transplantation: a retrospective cohort study. BMC Anesthesiol 2022; 22:161. [PMID: 35614393 PMCID: PMC9131582 DOI: 10.1186/s12871-022-01699-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/18/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Postreperfusion hyperkalemia (PRHK) has garnered increasing attention in regard to deceased liver transplantation (LT), especially for LT using the expanded criteria donor grafts. However, the impact of the effluent potassium (eK+) concentration on PRHK has been largely overlooked. We evaluated whether elevated eK+ concentrations are associated with PRHK in deceased LT. METHODS In this single-institution, retrospective cohort study, we included all adults who underwent deceased LT with intraoperative eK+ concentration monitoring between November 2016 and December 2018. The eK+ concentrations were obtained from the effluent samples collected following a standard portal vein flush. PRHK was defined as any serum potassium (sK+) level of > 5.5 mmol/L following reperfusion. Logistic regression was performed to identify predictors for PRHK, and linear regression was used to examine predictors of the maximum percentage increase in the sK+ level following reperfusion. RESULTS Of the 86 patients who met the inclusion criteria, 54 (62.8%) developed PRHK. Independent predictors for PRHK included greater graft weight (OR 1.283 [95% CI 1.029-1.599] per 100 g, P = 0.027), an elevated eK+ concentration (OR 1.291 [95% CI 1.068-1.561] per mol/L, P = 0.008), and a higher sK+ level before reperfusion (OR 4.459 [95% CI 1.543-12.884] per mol/L, P = 0.006). An eK+ concentration of more than 6.9 mmol/L had a sensitivity of 59.26% and a specificity of 78.12% for predicting PRHK (area under the receiver operating characteristic curve, 0.694). Multiple linear regression analyses indicated that the eK+ and sK+ levels before reperfusion were significant predictors of the maximum percentage increase in the sK+ level following reperfusion. In addition, PRHK was associated with an increased risk of postreperfusion significant arrhythmias, severe postreperfusion syndrome, and postoperative early allograft dysfunction. CONCLUSIONS This study shows that the eK+ concentration could predict the risk of PRHK in deceased LT. Further prospective studies are warranted to clarify these associations.
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Affiliation(s)
- Liang Zhang
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Beijing, 100050, China.
| | - Fu-Shan Xue
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Beijing, 100050, China
| | - Ming Tian
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Beijing, 100050, China
| | - Zhi-Jun Zhu
- Division of Liver Transplantation, Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China. .,Clinical Center for Pediatric Liver Transplantation, Capital Medical University, Beijing, China. .,Liver Transplantation Center, National Clinical Research Center for Digestive Diseases, Beijing, China.
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Koshy AN, Enyati A, Weinberg L, Han HC, Horrigan M, Gow PJ, Ko J, Thijs V, Testro A, Lim HS, Farouque O, Teh AW. Postoperative Atrial Fibrillation and Long-Term Risk of Stroke in Patients Undergoing Liver Transplantation. Stroke 2020; 52:111-120. [PMID: 33349017 DOI: 10.1161/strokeaha.120.031454] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Postoperative atrial fibrillation (POAF) is the commonest cardiovascular complication following liver transplantation (LT). This study sought to assess a possible association of POAF with subsequent thromboembolic events in patients undergoing LT. METHODS A retrospective cohort study of consecutive adults undergoing LT between 2010 and 2018 was undertaken. Patients were classified as POAF if atrial fibrillation (AF) was documented within 30 days of LT without a prior history of AF. Cases of ischemic stroke or systemic embolism were adjudicated by a panel of 2 independent physicians. RESULTS Among the 461 patients included, POAF occurred in 47 (10.2%) a median of 3 days following transplantation. Independent predictors of POAF included advancing age, postoperative sepsis and left atrial enlargement. Over a median follow-up of 4.9 (interquartile range, 2.9-7.2) years, 21 cases of stroke and systemic embolism occurred. Rates of thromboembolic events were significantly higher in patients with POAF (17.0% versus 3.1%; P<0.001). After adjustment, POAF remained a strong independent predictor of thromboembolic events (hazard ratio, 8.36 [95% CI, 2.34-29.79]). Increasing CHA2DS2VASc score was also an independent predictor of thromboembolic events (hazard ratio, 1.58 [95% CI, 1.02-2.46]). A model using POAF and a CHA2DS2VASc score ≥2 alone yielded a C statistic of 0.77, with appropriate calibration for the prediction of thromboembolic events. However, POAF was not an independent predictor of long-term mortality. CONCLUSIONS POAF following LT is associated with an 8-fold increased risk of thromboembolic events and the use of the CHA2DS2VASc score may facilitate risk stratification of these patients. Prospective studies are warranted to assess whether the use of oral anticoagulants can reduce the risk of thromboembolism following LT.
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Affiliation(s)
- Anoop N Koshy
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.).,Victorian Liver Transplant Unit, Austin Hospital, Melbourne, Australia (A.N.K., L.W., P.J.G., A.T.)
| | - Anees Enyati
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia
| | - Laurence Weinberg
- Department of Anaesthesia (L.W.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.).,Victorian Liver Transplant Unit, Austin Hospital, Melbourne, Australia (A.N.K., L.W., P.J.G., A.T.)
| | - Hui-Chen Han
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.)
| | - Mark Horrigan
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.)
| | - Paul J Gow
- The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.).,Victorian Liver Transplant Unit, Austin Hospital, Melbourne, Australia (A.N.K., L.W., P.J.G., A.T.)
| | - Jefferson Ko
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia
| | - Vincent Thijs
- Stroke Division, Florey Institute of Neuroscience and Mental Health and Department of Neurology (V.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.)
| | - Adam Testro
- The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.).,Victorian Liver Transplant Unit, Austin Hospital, Melbourne, Australia (A.N.K., L.W., P.J.G., A.T.)
| | - Han S Lim
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.)
| | - Omar Farouque
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.)
| | - Andrew W Teh
- Department of Cardiology (A.N.K., A.E., H.-C.H., M.H., J.K., H.S.L., O.F., A.W.T.), Austin Health, Melbourne, Victoria, Australia.,The University of Melbourne, Parkville, Victoria, Australia (A.N.K., L.W., H.-C.H., M.H., P.J.G., V.T., A.T., H.S.L., O.F., A.W.T.).,Cardiology Department, Eastern Health Clinical School, Monash University, Melbourne, Victoria, Australia (A.W.T.)
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