1
|
Nurmykhametova Z, Lesbekov T, Kaliyev R, Bekishev B, Jabayeva N, Novikova S, Faizov L, Vakhrushev I, Pya Y. Preliminary report of extracorporeal blood purification therapy in patients receiving LVAD: Cytosorb or Jafron HA330. J Extra Corpor Technol 2024; 56:10-15. [PMID: 38488713 PMCID: PMC10941830 DOI: 10.1051/ject/2023048] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 12/09/2023] [Indexed: 03/17/2024]
Abstract
BACKGROUND Left ventricular assist device (LVAD) candidates are at increased risk of immune dysregulation and infectious complications. To attenuate the elevated proinflammatory cytokine levels and associated adverse clinical outcomes, it has been postulated that extracorporeal blood purification could improve the overall survival rate and morbidity of patients undergoing LVAD implantation. METHODS We retrospectively reviewed prospectively collected data of 15 patients who underwent LVAD implantation at our center between January 2021 and March 2022. Of these, 15 (100%) who received HeartMate 3™ (St. Jude Medical, Abbott, MN, USA) device were eligible. Intraoperatively, patients were single randomized 1:1:1 to three groups: group 1, patients who received Cytosorb therapy (n = 5; installed in the CPB circuit); group 2, patients who received Jafron HA330 (n = 5; installed in the CPB circuit); and control group 3, patients who did not receive filter (n = 5; usual care, neither Cytosorb nor Jafron during CPB). Baseline patient characteristics and intraoperative data were compared between the groups. Blood sample analyses were performed to assess the levels of inflammatory markers (IL-1, 6, 8; CRP, Leukocyte, Lactate, PCT, NT-proBNP, TNF-α) in both preoperative and postoperative data. RESULTS Baseline patient characteristics were similar in all three groups. We found that IL1α; IL 6; IL8; Lactatedehydrogenase, PCT, pro-BNP, CRP; Leukocyte, and TNFα levels significantly increased with LVAD implantation and that neither Cytosorb nor Jafron influenced this response. In-hospital mortality and overall survival during follow-up were similar among the groups. CONCLUSION Our preliminary results showed that hemoadsorption therapy using Cytosorb or Jafron hemoadsorption (HA) 330 may not be clinically beneficial for patients with advanced heart failure undergoing LVAD implantation. Large prospective studies are needed to evaluate the potential role of HA therapy in improving outcomes in patients undergoing LVAD implantation.
Collapse
Affiliation(s)
- Zhuldyz Nurmykhametova
-
Department of Perfusiology and Assisted Circulation Laboratory, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Timur Lesbekov
-
Department of Adult Cardiac Surgery, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Rymbay Kaliyev
-
Department of Perfusiology and Assisted Circulation Laboratory, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Bolat Bekishev
-
Department of Anesthesiology and Intensive Care, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Nilufar Jabayeva
-
Department of Anesthesiology and Intensive Care, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Svetlana Novikova
-
Department of Adult Cardiac Surgery, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Linar Faizov
-
Department of Perfusiology and Assisted Circulation Laboratory, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Ivan Vakhrushev
-
Department of Anesthesiology and Intensive Care, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| | - Yuriy Pya
-
Department of Adult Cardiac Surgery, National Research Cardiac Surgery Center Astana 010000 Kazakhstan
| |
Collapse
|
2
|
Schildboeck C, Harm S, Hartmann J. In vitro Removal of Protein-Bound Retention Solutes by Extracorporeal Blood Purification Procedures. Blood Purif 2024; 53:231-242. [PMID: 38262384 DOI: 10.1159/000534906] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 10/26/2023] [Indexed: 01/25/2024]
Abstract
INTRODUCTION When the kidneys or liver fail, toxic metabolites accumulate in the patient's blood, causing cardiovascular and neurotoxic complications and increased mortality. Conventional membrane-based extracorporeal blood purification procedures cannot remove these toxins efficiently. The aim of this in vitro study was to determine whether commercial hemoperfusion adsorbers are suitable for removing protein-bound retention solutes from human plasma and whole blood as well as to compare the removal to conventional hemodialysis. METHODS For in vitro testing of the removal of protein-bound substances, whole blood and plasma were spiked with uremic retention solutes (homocysteine, hippuric acid, indoxyl sulfate, 3-carboxy-4-methyl-5-propyl-2-furanpropionic acid) and the toxins of liver failure (bilirubin, cholic acid, tryptophan, phenol). Subsequently, the protein binding of each retention solute was determined. The adsorption characteristics of the hemoperfusion adsorbers, Jafron HA and Biosky MG, both approved for the adsorption of protein-bound uremic retention solutes and Cytosorb, an adsorber recommended for adsorption of cytokines, were tested by incubating them in spiked whole blood or plasma for 1 h. Subsequently, the adsorption characteristics of the adsorbers were tested in a dynamic system. For this purpose, a 6-h in vitro hemoperfusion treatment was compared with an equally long in vitro hemodialysis treatment. RESULTS Hippuric acid, homocysteine, indoxyl sulfate, and tryptophan were most effectively removed by hemodialysis. Bilirubin and cholic acid were removed best by hemoperfusion with Cytosorb. A treatment with Jafron HA and Biosky MG showed similar results for the adsorption of the tested retention solutes and were best for removing phenol. 3-Carboxy-4-methyl-5-propyl-2-furanpropionic acid could not be removed with any treatment method. DISCUSSION/CONCLUSION A combination of hemodialysis with hemoperfusion seems promising to improve the removal of some toxic metabolites in extracorporeal therapies. However, some very strongly protein-bound metabolites cannot be removed adequately with the adsorbers tested.
Collapse
Affiliation(s)
- Claudia Schildboeck
- Department for Biomedical Research, University for Continuing Education Krems, Krems, Austria
| | - Stephan Harm
- Department for Biomedical Research, University for Continuing Education Krems, Krems, Austria
| | - Jens Hartmann
- Department for Biomedical Research, University for Continuing Education Krems, Krems, Austria
| |
Collapse
|
3
|
Abdelaty M, Mohamed A, Saad MO, Mitwally H, Alkadi MM, Hashim A, Al Malki H, Ali HS, Mohamed AS, Mustafa E, Alalawi A, Elshafei M, Othman M, Khatib M, Ibrahim AS. Extracorporeal blood purification with Oxiris ® filter in critically ill patients with COVID-19 requiring continuous renal replacement therapy. Int J Artif Organs 2023; 46:629-635. [PMID: 37926985 DOI: 10.1177/03913988231207716] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
INTRODUCTION Severe COVID-19 is associated with a dysregulated immune response that usually leads to cytokine release syndrome. This study aimed to compare the use of extracorporeal blood purification therapy (Oxiris®) versus standard continuous renal replacement therapy (CRRT) in critically-ill patients with severe COVID-19. METHODS This was a national, multicenter, retrospective study of patients with COVID-19 admitted to the intensive care unit (ICU) between March and October 2020 who required CRRT. Patients were categorized into two groups: Oxiris® CRRT and standard CRRT. The primary outcome was the number of patients alive and ventilator-free at 30-days post-CRRT treatment. Key secondary endpoints included change in inflammatory markers, Sequential Organ Failure Assessment (SOFA) scores, and PaO2/FiO2 ratio at 24- and 72-h post Oxiris® initiation. RESULTS Thirty-five patients received Oxiris® CRRT and 23 patients received standard CRRT. The primary outcome was 31.4% in the Oxiris® group versus 4.3% in the standard CRRT group (adjusted odds ratio 5.97, 95% confidence interval [CI], 0.64-55.6; p = 0.117). In the Oxiris® group, interleukin-6 (IL-6) concentrations significantly decreased at 24 and 72-h (p = 0.033) and PaO2/FiO2 ratio significantly increased at 24 and 72 h after Oxiris® initiation (p = 0.001). There was no significant change in SOFA scores at 24- and 72-h after Oxiris® initiation. CONCLUSION The number of patients alive and ventilator-free at 30-days was higher in the Oxiris® group than that in the standard CRRT group; however, the difference did not reach statistical significance after adjusting for the baseline severity of illness. There was a significant reduction in IL-6 and significant improvement in PaO2/FiO2 ratio after Oxiris® CRRT initiation.
Collapse
Affiliation(s)
- Mohamed Abdelaty
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Ad Dawhah, Qatar
| | - Adham Mohamed
- Saint Luke's Hospital of Kansas City, Kansas City, MO, USA
| | - Mohamed O Saad
- Department of Pharmacy, Al Wakra Hospital, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Hassan Mitwally
- Department of Pharmacy, Al Wakra Hospital, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Mohamad M Alkadi
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Ad Dawhah, Qatar
- Division of Nephrology, Department of Internal Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Ahmed Hashim
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Hassan Al Malki
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Ad Dawhah, Qatar
- Division of Nephrology, Department of Internal Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Husain S Ali
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | | | - Emad Mustafa
- Department of Nursing, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Abdulaziz Alalawi
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Moustafa Elshafei
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Muftah Othman
- Division of Nephrology, Department of Internal Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Mohamad Khatib
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
| | - Abdul-Salam Ibrahim
- Department of Critical Care Medicine, Hamad Medical Corporation, Doha, Ad Dawhah, Qatar
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Ad Dawhah, Qatar
| |
Collapse
|
4
|
Ostermann M, Ankawi G, Cantaluppi V, Madarasu R, Dolan K, Husain-Syed F, Kashani K, Mehta R, Prowle J, Reis T, Rimmelé T, Zarbock A, Kellum JA, Ronco C. Nomenclature of Extracorporeal Blood Purification Therapies for Acute Indications: The Nomenclature Standardization Conference. Blood Purif 2023:1. [PMID: 38038238 DOI: 10.1159/000533468] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 07/28/2023] [Indexed: 12/02/2023]
Abstract
The development of new extracorporeal blood purification (EBP) techniques has led to increased application in clinical practice but also inconsistencies in nomenclature and misunderstanding. In November 2022, an international consensus conference was held to establish consensus on the terminology of EBP therapies. It was agreed to define EBP therapies as techniques that use an extracorporeal circuit to remove and/or modulate circulating substances to achieve physiological homeostasis, including support of the function of specific organs and/or detoxification. Specific acute EBP techniques include renal replacement therapy, isolated ultrafiltration, hemoadsorption, and plasma therapies, all of which can be applied in isolation and combination. This paper summarizes the proposed nomenclature of EBP therapies and serves as a framework for clinical practice and future research.
Collapse
Affiliation(s)
- Marlies Ostermann
- Department of Critical Care and Nephrology, Guy's and St Thomas' Hospital, London, UK
| | - Ghada Ankawi
- Department of Internal Medicine and Nephrology, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Vincenzo Cantaluppi
- Nephrology and Kidney Transplantation Unit, Department of Translational Medicine, University of Piemonte Orientale, "Maggiore della Carità" University Hospital, Novara, Italy
| | - Rajasekara Madarasu
- Department of Nephrology, Star Hospitals, Renown Clinical Services, Hyderabad, India
| | - Kristin Dolan
- Department of Paediatrics, Mercy Children's Hospital Kansas City, Kansas City, Kansas, USA
| | - Faeq Husain-Syed
- Department of Internal Medicine II, University Hospital Giessen and Marburg, Justus-Liebig-University Giessen, Giessen, Germany
| | - Kianoush Kashani
- Division of Nephrology and Hypertension, Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Ravindra Mehta
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - John Prowle
- Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Thiago Reis
- Department of Nephrology and Kidney Transplantation, Fenix Group, São Paulo, Brazil
- Laboratory of Molecular Pharmacology, University of Brasília, Brasília, Brazil
- Division of Nephrology, Syrian-Lebanese Hospital, São Paulo, Brazil
| | - Thomas Rimmelé
- Department of Anaesthesiology and Critical Care Medicine, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France
| | - Alexander Zarbock
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
| | - John A Kellum
- Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Claudio Ronco
- International Renal Research Institute of Vicenza (IRRIV), Vicenza, Italy
- Department of Nephrology, Dialysis and Kidney Transplantation, San Bortolo Hospital, Vicenza, Italy
- Department of Medicine (DIMED), Università degli Studi di Padova, Padua, Italy
| |
Collapse
|
5
|
Teixeira JP, Zeidman A, Beaubien-Souligny W, Cerdá J, Connor MJ, Eggleston K, Juncos LA, da Silva JR, Wells C, Yessayan L, Barker AB, McConville W, Speer R, Wille KM, Neyra JA, Tolwani A. Proceedings of the 2022 UAB CRRT Academy: Non-Invasive Hemodynamic Monitoring to Guide Fluid Removal with CRRT and Proliferation of Extracorporeal Blood Purification Devices. Blood Purif 2023; 52:857-879. [PMID: 37742622 DOI: 10.1159/000533573] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/29/2023] [Indexed: 09/26/2023]
Abstract
In 2022, we celebrated the 15th anniversary of the University of Alabama at Birmingham (UAB) Continuous Renal Replacement Therapy (CRRT) Academy, a 2-day conference attended yearly by an international audience of over 100 nephrology, critical care, and multidisciplinary trainees and practitioners. This year, we introduce the proceedings of the UAB CRRT Academy, a yearly review of select emerging topics in the field of critical care nephrology that feature prominently in the conference. First, we review the rapidly evolving field of non-invasive hemodynamic monitoring and its potential to guide fluid removal by renal replacement therapy (RRT). We begin by summarizing the accumulating data associating fluid overload with harm in critical illness and the potential for harm from end-organ hypoperfusion caused by excessive fluid removal with RRT, underscoring the importance of accurate, dynamic assessment of volume status. We describe four applications of point-of-care ultrasound used to identify patients in need of urgent fluid removal or likely to tolerate fluid removal: lung ultrasound, inferior vena cava ultrasound, venous excess ultrasonography, and Doppler of the left ventricular outflow track to estimate stroke volume. We briefly introduce other minimally invasive hemodynamic monitoring technologies before concluding that additional prospective data are urgently needed to adapt these technologies to the specific task of fluid removal by RRT and to learn how best to integrate them into practical fluid-management strategies. Second, we focus on the growth of novel extracorporeal blood purification devices, starting with brief reviews of the inflammatory underpinnings of multiorgan dysfunction and the specific applications of pathogen, endotoxin, and/or cytokine removal and immunomodulation. Finally, we review a series of specific adsorptive technologies, several of which have seen substantial clinical use during the COVID-19 pandemic, describing their mechanisms of target removal, the limited existing data supporting their efficacy, ongoing and future studies, and the need for additional prospective trials.
Collapse
Affiliation(s)
- J Pedro Teixeira
- Division of Nephrology and Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico, USA
| | - Amanda Zeidman
- Division of Nephrology, Department of Medicine, Institute for Critical Care Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Jorge Cerdá
- Department of Medicine, Nephrology, Albany Medical College, Albany, New York, USA
| | - Michael J Connor
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine and Division of Renal Medicine, Department of Medicine, Emory University, Atlanta, Georgia, USA
| | | | - Luis A Juncos
- Division of Nephrology, Department of Internal Medicine, Central Arkansas Veterans' Healthcare System, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | | | - Catherine Wells
- Division of Nephrology, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Lenar Yessayan
- Division of Nephrology, Department of Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrew B Barker
- Division of Critical Care Medicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Wendy McConville
- School of Nursing, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Rajesh Speer
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Keith M Wille
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Javier A Neyra
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Ashita Tolwani
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| |
Collapse
|
6
|
Premuzic V, Situm I, Lovric D, Erceg A, Karmelic D, Mogus M, Jurjevic M, Nedeljkovic V, Mazar M, Mihaljevic S, Villa G, Ronco C. Sequential Extracorporeal Blood Purification Is Associated with Prolonged Survival among ICU Patients with COVID-19 and Confirmed Bacterial Superinfection. Blood Purif 2023; 52:642-651. [PMID: 37482053 DOI: 10.1159/000531356] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/30/2023] [Indexed: 07/25/2023]
Abstract
INTRODUCTION This study investigates the impact of sequential extracorporeal treatments with oXiris® or CytoSorb® plus Seraph-100® on the clinical and laboratory parameters of critically ill COVID-19 patients with bacterial superinfection. METHODS Patients admitted to the intensive care unit with COVID-19, bacterial superinfection, and undergoing blood purification (BP) were enrolled in this prospective, single-center, observational study. "standard BP" with oXiris® or CytoSorb® were used in 35 COVID-19 patients with bacterial infection. Seraph-100® was added in 33 patients when available serially in the same oXiris® circuit or as sequential treatment with CytoSorb® as a sequential BP. RESULTS A significant reduction in SOFA score 3 days after treatment was observed in patients undergoing sequential BP (11.3 vs. 8.17, p < 0.01) compared to those undergoing "standard BP" (11.0 vs. 10.3, p > 0.05). The difference between the observed and expected mortality rate based on APACHE IV was greater in the sequential BP group (42.4% vs. 81.7%, p < 0.001) than the "standard BP" (74.2% vs. 81.7%, p > 0.05). Patients treated with sequential BP had a longer survival than those treated with "standard BP" (22.4 vs. 18.7 months; p < 0.001). CONCLUSIONS The sequential approach may enhance the positive effect of BP on organ dysfunction among critically ill patients with COVID-19 and bacterial superinfection.
Collapse
Affiliation(s)
- Vedran Premuzic
- Department of Nephrology, Hypertension, Dialysis and Transplantation, University Hospital Center Zagreb, Zagreb, Croatia
| | - Ivan Situm
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Daniel Lovric
- Cardiology Clinic, University Hospital Center Zagreb, Zagreb, Croatia
| | - Ante Erceg
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Dora Karmelic
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Mate Mogus
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Matija Jurjevic
- Clinic of anesthesiology resuscitation and intensive care, General Hospital Josip Bencevic, Slavonski Brod, Croatia
| | - Vanja Nedeljkovic
- Department of Internal Medicine, Special Hospital for Lung Diseases, Zagreb, Croatia
| | - Mirabel Mazar
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Slobodan Mihaljevic
- Clinic of anesthesiology resuscitation and intensive care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Gianluca Villa
- Department of Health Sciences, Section of Anaesthesiology, Intensive Care and Pain Medicine, University of Florence, Florence, Italy
- Department of Anaesthesia and Intensive Care, Azienda Ospedaliero Universitaria Careggi, Florence, Italy
| | - Claudio Ronco
- Department of Medicine, Università di Padova, Padova, Italy
- Department of Nephrology, Dialysis and Kidney Transplantation, San Bortolo Hospital, Vicenza, Italy
| |
Collapse
|
7
|
Li Y, Chen Y, Yang T, Chang K, Deng N, Zhao W, Su B. Targeting circulating high mobility group box-1 and histones by extracorporeal blood purification as an immunomodulation strategy against critical illnesses. Crit Care 2023; 27:77. [PMID: 36855150 PMCID: PMC9972334 DOI: 10.1186/s13054-023-04382-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 02/23/2023] [Indexed: 03/02/2023] Open
Abstract
Both high mobility group box-1 (HMGB1) and histones are major damage-associated molecular patterns (DAPMs) that mediate lethal systemic inflammation, activation of the complement and coagulation system, endothelial injury and multiple organ dysfunction syndrome in critical illnesses. Although accumulating evidence collectively shows that targeting HMGB1 or histones by their specific antibodies or inhibitors could significantly mitigate aberrant immune responses in multiple critically ill animal models, routine clinical use of such agents is still not recommended by any guideline. In contrast, extracorporeal blood purification, which has been widely used to replace dysfunctional organs and remove exogenous or endogenous toxins in intensive care units, may also exert an immunomodulatory effect by eliminating inflammatory mediators such as cytokines, endotoxin, HMGB1 and histones in patients with critical illnesses. In this review, we summarize the multiple immunopathological roles of HMGB1 and histones in mediating inflammation, immune thrombosis and organ dysfunction and discuss the rationale for the removal of these DAMPs using various hemofilters. The latest preclinical and clinical evidence for the use of extracorporeal blood purification to improve the clinical outcome of critically ill patients by targeting circulating HMGB1 and histones is also gathered.
Collapse
Affiliation(s)
- Yupei Li
- grid.13291.380000 0001 0807 1581Department of Nephrology, West China Hospital, Sichuan University, Chengdu, China
| | - Yu Chen
- grid.13291.380000 0001 0807 1581State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, China
| | - Tinghang Yang
- grid.13291.380000 0001 0807 1581Department of Nephrology, West China Hospital, Sichuan University, Chengdu, China
| | - Kaixi Chang
- grid.13291.380000 0001 0807 1581Department of Nephrology, West China Hospital, Sichuan University, Chengdu, China
| | - Ningyue Deng
- grid.13291.380000 0001 0807 1581Department of Nephrology, West China Hospital, Sichuan University, Chengdu, China
| | - Weifeng Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, China. .,Med-X Center for Materials, Sichuan University, Chengdu, China.
| | - Baihai Su
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, China. .,Med-X Center for Materials, Sichuan University, Chengdu, China. .,Med+ Biomaterial Institute of West China Hospital, Sichuan University, Chengdu, 610041, China.
| |
Collapse
|
8
|
Monard C, Bianchi N, Poli E, Altarelli M, Debonneville A, Oddo M, Liaudet L, Schneider A. Cytokine hemoadsorption with CytoSorb ® in post-cardiac arrest syndrome, a pilot randomized controlled trial. Crit Care 2023; 27:36. [PMID: 36691082 PMCID: PMC9869834 DOI: 10.1186/s13054-023-04323-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 01/14/2023] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Hemoadsorption (HA) might mitigate the systemic inflammatory response associated with post-cardiac arrest syndrome (PCAS) and improve outcomes. Here, we investigated the feasibility, safety and efficacy of HA with CytoSorb® in cardiac arrest (CA) survivors at risk of PCAS. METHODS In this pilot randomized controlled trial, we included patients admitted to our intensive care unit following CA and likely to develop PCAS: required norepinephrine (> 0.2 µg/kg/min), and/or had serum lactate > 6 mmol/l and/or a time-to-return of spontaneous circulation (ROSC) > 25 min. Those requiring ECMO or renal replacement therapy were excluded. Eligible patients were randomly allocated to either receive standard of care (SOC) or SOC plus HA. Hemoadsorption was performed as stand-alone therapy for 24 h, using CytoSorb® and regional heparin-protamine anticoagulation. We collected feasibility, safety and clinical data as well as serial plasma cytokines levels within 72 h of randomization. RESULTS We enrolled 21 patients, of whom 16 (76%) had out-of-hospital CA. Median (IQR) time-to-ROSC was 30 (20, 45) minutes. Ten were assigned to the HA group and 11 to the SOC group. Hemoadsorption was initiated in all patients allocated to the HA group within 18 (11, 23) h of ICU admission and conducted for a median duration of 21 (14, 24) h. The intervention was well tolerated except for a trend for a higher rate of aPTT elevation (5 (50%) vs 2 (18%) p = 0.18) and mild (100-150 G/L) thrombocytopenia at day 1 (5 (50%) vs 2 (18%) p = 0.18). Interleukin (IL)-6 plasma levels at randomization were low (< 100 pg/mL) in 10 (48%) patients and elevated (> 1000 pg/mL) in 6 (29%). The median relative reduction in IL-6 at 48 h was 75% (60, 94) in the HA group versus 5% (- 47, 70) in the SOC group (p = 0.06). CONCLUSIONS In CA survivors at risk of PCAS, HA was feasible, safe and was associated with a nonsignificant reduction in cytokine plasma levels. Future trials are needed to further define the role of HA after CA. Those studies should include cytokine assessment to enrich the study population. TRIAL REGISTRATION NCT03523039, registered 14 May 2018.
Collapse
Affiliation(s)
- Céline Monard
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Nathan Bianchi
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Elettra Poli
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Marco Altarelli
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Anne Debonneville
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
- Thoracic Surgery Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Mauro Oddo
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
- Faculty of Biology and Medicine (FBM), University of Lausanne (UNIL), Lausanne, Switzerland
- Medical Directorate, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Lucas Liaudet
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
- Faculty of Biology and Medicine (FBM), University of Lausanne (UNIL), Lausanne, Switzerland
| | - Antoine Schneider
- Adult Intensive Care Unit, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.
- Faculty of Biology and Medicine (FBM), University of Lausanne (UNIL), Lausanne, Switzerland.
| |
Collapse
|
9
|
Abraham P, Monard C, Schneider A, Rimmelé T. Extracorporeal Blood Purification in Burns: For Whom, Why, and How? Blood Purif 2023; 52:17-24. [PMID: 35738240 PMCID: PMC9909620 DOI: 10.1159/000525085] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 05/03/2022] [Indexed: 02/03/2023]
Abstract
Patients with serious thermal burn injuries require immediate and specialized care in order to minimize morbidity and mortality. Optimal fluid resuscitation, nutritional support, pulmonary care, burn wound care, and infection control practices represent key aspects of patient care in burn centers. When severely burned, the patient usually presents a systemic inflammatory response syndrome, soon balanced by a counter anti-inflammatory response syndrome. These may lead to immune dysregulation/exhaustion favoring infectious complications that dramatically impair the prognosis of burn patients. This narrative review provides an overview of the main concepts, current understanding, and potential applications of extracorporeal blood purification techniques for burn patient management. Current understanding of burn patients' immune responses is reported. Hypotheses and data on the potential value of immunoregulation are reviewed. Finally, how extracorporeal blood purification may be of interest in this specific population is discussed.
Collapse
Affiliation(s)
- Paul Abraham
- Adult Intensive Care Unit and Burn Center, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland,*Paul Abraham,
| | - Céline Monard
- Anesthesiology and Intensive Care Medicine, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France,EA 7426, Pathophysiology of Injury-Induced Immunosuppression (P13), Claude Bernard University Lyon 1-Biomérieux-Hospices Civils de Lyon, Lyon, France
| | - Antoine Schneider
- Adult Intensive Care Unit and Burn Center, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Thomas Rimmelé
- Anesthesiology and Intensive Care Medicine, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France,EA 7426, Pathophysiology of Injury-Induced Immunosuppression (P13), Claude Bernard University Lyon 1-Biomérieux-Hospices Civils de Lyon, Lyon, France
| |
Collapse
|
10
|
Lumlertgul N, Hall A, Camporota L, Crichton S, Ostermann M. Clearance of inflammatory cytokines in patients with septic acute kidney injury during renal replacement therapy using the EMiC2 filter (Clic-AKI study). Crit Care 2021; 25:39. [PMID: 33509215 PMCID: PMC7845048 DOI: 10.1186/s13054-021-03476-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/20/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND The EMiC2 membrane is a medium cut-off haemofilter (45 kiloDalton). Little is known regarding its efficacy in eliminating medium-sized cytokines in sepsis. This study aimed to explore the effects of continuous veno-venous haemodialysis (CVVHD) using the EMiC2 filter on cytokine clearance. METHODS This was a prospective observational study conducted in critically ill patients with sepsis and acute kidney injury requiring kidney replacement therapy. We measured concentrations of 12 cytokines [Interleukin (IL) IL-1β, IL-1α, IL-2, IL-4, IL-6, IL-8, IL-10, interferon (IFN)-γ, tumour necrosis factor (TNF)-α, vascular endothelial growth factor, monocyte chemoattractant protein (MCP)-1, epidermal growth factor (EGF)] in plasma at baseline (T0) and pre- and post-dialyzer at 1, 6, 24, and 48 h after CVVHD initiation and in the effluent fluid at corresponding time points. Outcomes were the effluent and adsorptive clearance rates, mass balances, and changes in serial serum concentrations. RESULTS Twelve patients were included in the final analysis. All cytokines except EGF concentrations declined over 48 h (p < 0.001). The effluent clearance rates were variable and ranged from negligible values for IL-2, IFN-γ, IL-1α, IL-1β, and EGF, to 19.0 ml/min for TNF-α. Negative or minimal adsorption was observed. The effluent and adsorptive clearance rates remained steady over time. The percentage of cytokine removal was low for most cytokines throughout the 48-h period. CONCLUSION EMiC2-CVVHD achieved modest removal of most cytokines and demonstrated small to no adsorptive capacity despite a decline in plasma cytokine concentrations. This suggests that changes in plasma cytokine concentrations may not be solely influenced by extracorporeal removal. TRIAL REGISTRATION NCT03231748, registered on 27th July 2017.
Collapse
Affiliation(s)
- Nuttha Lumlertgul
- Department of Critical Care, Guy's and St Thomas' Hospital, King's College London, NHS Foundation Trust, 249 Westminster Bridge Road, London, SE1 7EH, UK. .,Division of Nephrology and Excellence Centre for Critical Care Nephrology, King Chulalongkorn Memorial Hospital, Bangkok, Thailand. .,Critical Care Nephrology Research Unit, Chulalongkorn University, Bangkok, Thailand.
| | - Anna Hall
- Department of Critical Care, Guy's and St Thomas' Hospital, King's College London, NHS Foundation Trust, 249 Westminster Bridge Road, London, SE1 7EH, UK.,Zorgsaam Terneuzen, Rotterdam, The Netherlands
| | - Luigi Camporota
- Department of Critical Care, Guy's and St Thomas' Hospital, King's College London, NHS Foundation Trust, 249 Westminster Bridge Road, London, SE1 7EH, UK
| | - Siobhan Crichton
- Medical Research Council Clinical Trials Unit, University College London, London, UK
| | - Marlies Ostermann
- Department of Critical Care, Guy's and St Thomas' Hospital, King's College London, NHS Foundation Trust, 249 Westminster Bridge Road, London, SE1 7EH, UK
| |
Collapse
|
11
|
Abstract
Das akute Nierenversagen („acute kidney injury“, AKI) ist eine häufige Komplikation bei COVID-19 („coronavirus disease 2019“). Es geht häufig mit der progredienten respiratorischen Verschlechterung einher und ist mit einer erhöhten Morbidität und Mortalität assoziiert. Das AKI ist vermutlich multifaktorieller Genese, wobei auch ein direkter Virusbefall der Niere eine Rolle zu spielen scheint. Spezifische Behandlungsverfahren für das COVID-19-assoziierte Nierenversagen existieren aktuell nicht. Auch die Rolle extrakorporaler Verfahren in der COVID-19-Behandlung konnte bislang nicht geklärt werden. Aktuelle Daten deuten auf eine anhaltende Nierenfunktionseinschränkung nach COVID-19-assoziiertem AKI hin, sodass eine Reevaluation der Nierenfunktion nach stattgehabter Erkrankung empfohlen werden sollte.
Collapse
Affiliation(s)
- A Gäckler
- Klink für Nephrologie, Universitätsmedizin Essen, Universität Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Deutschland
| | - H Rohn
- Klinik für Infektiologie, Westdeutsches Zentrum für Infektiologie, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Deutschland
| | - O Witzke
- Klinik für Infektiologie, Westdeutsches Zentrum für Infektiologie, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Deutschland
| |
Collapse
|
12
|
Wang Q, Hu Z. Successful recovery of severe COVID-19 with cytokine storm treating with extracorporeal blood purification. Int J Infect Dis 2020; 96:618-620. [PMID: 32470601 PMCID: PMC7255259 DOI: 10.1016/j.ijid.2020.05.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/07/2020] [Accepted: 05/20/2020] [Indexed: 01/08/2023] Open
Abstract
The prognosis of critical cases of COVID-19 might be changed if a timely intervention of EBP was performed. EBP may help to attenuate the progression of ARDS. Evaluating FDPs as a sensitive marker of injury and prognosis of COVID-19 is warranted.
COVID-19 associated cytokine storm could rapidly induce ARDS, and the patients would require mechanical ventilation. However, the prognosis was not that optimistic. The outcome might be changed if the timely intervention of EBP was performed. We present a case of severe SARS-CoV-2 infection who recovered from a cytokine storm.
Collapse
Affiliation(s)
- Qiang Wang
- Department of Nephrology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Zhao Hu
- Department of Nephrology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan 250012, China.
| |
Collapse
|
13
|
Hsiao CY, Gresham C, Marshall MR. Treatment of lead and arsenic poisoning in anuric patients - a case report and narrative review of the literature. BMC Nephrol 2019; 20:374. [PMID: 31623560 PMCID: PMC6796459 DOI: 10.1186/s12882-019-1561-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 07/18/2018] [Accepted: 09/20/2019] [Indexed: 12/04/2022] Open
Abstract
Background Heavy metal poisoning can cause debilitating illness if left untreated, and its management in anuric patients poses challenges. Literature with which to guide clinical practice in this area is rather scattered. Case presentation We present a case of symptomatic lead and arsenic poisoning from use of Ayurvedic medicine in a 28-year-old man with end-stage kidney disease on chronic hemodialysis. We describe his treatment course with chelating agents and extracorporeal blood purification, and review the relevant literature to provide general guidance. Conclusion Cumulative clinical experience assists in identifying preferred chelators and modalities of extracorporeal blood purification when managing such patients. However, a larger body of real-world or clinical trial evidence is necessary to inform evidence-based guidelines for the management of heavy metal poisoning in anuric patients.
Collapse
Affiliation(s)
- Chun-Yuan Hsiao
- Department of Renal Medicine, Middlemore Hospital, Counties Manukau Health, Private Bag 93311, Otahuhu, Auckland, 1640, New Zealand
| | - Chip Gresham
- Department of Emergency Medicine, Middlemore Hospital, Auckland, 1640, New Zealand.,National Poisons Centre, Dunedin, 9054, New Zealand
| | - Mark R Marshall
- Department of Renal Medicine, Middlemore Hospital, Counties Manukau Health, Private Bag 93311, Otahuhu, Auckland, 1640, New Zealand. .,Faculty of Medical and Health Sciences, University of Auckland, Auckland, 1142, New Zealand. .,Baxter Healthcare (Asia Pacific) Pte Ltd, Singapore, 189673, Singapore.
| |
Collapse
|
14
|
Hawchar F, László I, Öveges N, Trásy D, Ondrik Z, Molnar Z. Extracorporeal cytokine adsorption in septic shock: A proof of concept randomized, controlled pilot study. J Crit Care 2019; 49:172-8. [PMID: 30448517 DOI: 10.1016/j.jcrc.2018.11.003] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/27/2018] [Accepted: 11/08/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND The aim of this proof of concept, prospective, randomized pilot trial was to investigate the effects of extracorporeal cytokine removal (CytoSorb®) applied as a standalone treatment in patients with septic shock. METHODS 20 patients with early (<24 h) onset of septic shock of medical origin, on mechanical ventilation, norepinephrine>10 μg/min, procalcitonin (PCT) > 3 ng/mL without the need for renal replacement therapy were randomized into CytoSorb (n = 10) and Control groups (n = 10). CytoSorb therapy lasted for 24 h. Clinical and laboratory data were recorded at baseline (T0), T12, T24, and T48 hours. RESULTS Overall SOFA scores did not differ between the groups. In the CytoSorb-group norepinephrine requirements and PCT concentration decreased significantly (norepinephrine: CytoSorb: T0 = 0.54[IQR:0.20-1.22], T48 = 0.16[IQR:0.07-0.48], p = .016; Controls: T0 = 0.43[IQR:0.19-0.64], T48 = 0.25[IQR:0.08-0.65] μg/kg/min; PCT: CytoSorb: T0 median = 20.6[IQR: 6.5-144.5], T48 = 5.6[1.9-54.4], p = .004; Control: T0 = 13.2[7.6-47.8], T48 = 9.2[3.8-44.2]ng/mL). Big-endothelin-1 concentrations were also significantly lower in the CytoSorb group (CytoSorb: T0 = 1.3 ± 0.6, *T24 = 1.0 ± 0.4, T48 = 1.4 ± 0.8, *p = .003; Control: T0 = 1.1 ± 0.7, T24 = 1.1 ± 0.6, T48 = 1.2 ± 0.6 pmol/L, p = .115). There were no CytoSorb therapy-related adverse events. CONCLUSIONS This is the first trial to investigate the effects of early extracorporeal cytokine adsorption treatment in septic shock applied without renal replacement therapy. It was found to be safe with significant effects on norepinephrine requirements, PCT and Big-endothelin-1 concentrations compared to controls. TRIAL REGISTRATION The study has been registered on ClinicalTrials.gov, under the registration number of NCT02288975, registered 13 November 2014.
Collapse
|
15
|
Francey T, Schweighauser A. Regional Citrate Anticoagulation for Intermittent Hemodialysis in Dogs. J Vet Intern Med 2017; 32:147-156. [PMID: 29171099 PMCID: PMC5787180 DOI: 10.1111/jvim.14867] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 07/15/2017] [Revised: 08/17/2017] [Accepted: 10/11/2017] [Indexed: 12/05/2022] Open
Abstract
Background The traditional systemic heparinization used for anticoagulation in extracorporeal therapies may cause fatal complications in animals at risk of bleeding. Hypothesis/Objectives To develop and validate a protocol of regional citrate anticoagulation (RCA) for intermittent hemodialysis in dogs. Animals A total of 172 dogs treated with hemodialysis for acute kidney injury. Methods In vitro titration was performed, adding trisodium citrate and calcium chloride to heparinized canine blood. A tentative protocol was used first in 66 treatments with additional heparinization and subsequently in 518 heparin‐free treatments. Safety and adequacy of RCA were assessed based on clinical and laboratory monitoring, dialyzer pressure gradient, treatment completion, and visual scoring of the extracorporeal circuit. Results Addition of 1 mmol/L citrate to heparinized blood decreased the ionized calcium concentration by 0.23 mmol/L (95% confidence interval [CI], 0.16–0.30) and 1 mmol/L calcium increased it by 0.62 mmol/L (95% CI, 0.45–0.79). Heparin‐free treatments were initiated with infusion of trisodium citrate (102 mmol/L) at 2.55 mmol/L blood and calcium chloride (340 mmol/L) at 0.85 mmol/L. Citrate and calcium administrations were adjusted in 27 and 34% of the treatments, respectively. Overall, anticoagulation was satisfactory in 92% of the treatments, with expected azotemia reduction in 95% (urea) and 86% (creatinine), stable dialyzer pressure gradient in 82%, and clean extracorporeal circuits in 92% of the treatments. Eighteen treatments (3.5%) were discontinued prematurely, 9 because of clotting and 9 for reasons unrelated to the RCA procedure. Conclusions and Clinical Importance Regional citrate anticoagulation allows safe and efficient heparin‐free hemodialysis in dogs at risk of bleeding.
Collapse
Affiliation(s)
- T Francey
- Division of Small Animal Internal Medicine, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - A Schweighauser
- Division of Small Animal Internal Medicine, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| |
Collapse
|