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Kashima Y, Koami H, Sakamoto Y. The Relationship Between Acute-Phase Circuit Occlusion and Blood Calcium Concentration in an Ex Vivo Continuous Renal Replacement Therapy Model. Cureus 2024; 16:e59330. [PMID: 38817525 PMCID: PMC11139355 DOI: 10.7759/cureus.59330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2024] [Indexed: 06/01/2024] Open
Abstract
Background and objective Continuous renal replacement therapy (CRRT) is a blood purification therapy modality for the treatment of renal failure in critically ill hospitalized patients with multiorgan dysfunction, effectively preventing uremia and multiple organ failure while improving renal function. However, the perfusion of patient blood through extracorporeal circulation often results in unexpected early occlusion of the CRRT circuit or hemofilter, leading to frequent interruptions in CRRT and wastage of medical resources. Moreover, clinical research on such circuit occlusions is limited. In Japan, CRRT circuits require long-term perfusion, often lasting 24 hours or more, indicating the need for a model capable of inducing occlusion at any arbitrary time; this model can evaluate various aspects, including causes and underlying mechanisms, and contribute to the development of an occlusion prediction method. Hence, we hypothesized the need for a model for inducing occlusion at arbitrary time points. Consequently, we strove to develop an ex vivo circuit occlusion model involving the injection of calcium into circulating citrated animal blood to evaluate the relationship between the amount of calcium chloride injected, circuit occlusion time, and changes in circuit pressure over time. Methods We developed a circuit occlusion model using a commercially available CRRT circuit, polysulfone membrane hemofilter, heating extension tube, and thermostatic water bath, along with commercially available citrated bovine whole blood. The circuit was filled with blood over a 10-min duration using a roller pump and was occluded after a specific period by varying the flow rate of calcium injected into bovine whole blood. Additionally, continuous injection of 1 mEq/mL calcium chloride into the circuit was maintained while bovine whole blood circulated. Measurements were performed at each calcium injection flow rate (2, 3, and 4 mL/h), with each measurement performed five times. The group that did not receive calcium injection was used as the control (0 mL/h: Con), and the experiment was performed three times. Groups were defined as "0, 2, 3, and 4" for each calcium injection flow rate. The relationship among the amount of calcium chloride injected, circuit occlusion time, and changes in circuit pressure over time was evaluated. Furthermore, blood tests and blood viscoelastic tests were performed at arbitrary times. Results The circuit occlusion time varied with each calcium injection flow rate, and a significant difference was observed between each group (p<0.05). Circuit pressure gradually changed at four min before occlusion when calcium was injected at 2, 3, and 4 mL/h, with a more rapid change at one min before occlusion. We measured circuit pressure at four and one min before occlusion (-4 min, and -1 min, respectively), and at the time of circuit occlusion (0 min) in the Con and 4 mL/h groups. Significant differences were observed in AP between -4 min and 0 min and -1 min and 0 min at a calcium flow rate of 4 mL/h. Additionally, significant differences were seen in prefilter and return pressures between -4 min and 0 min, -4 min and -1 min, and -1 min and 0 min at a calcium flow rate of 4 mL/h (p<0.05). Conclusions Our proposed model accurately estimated the occlusion time based on changes in circuit pressure. This model can be used to create various experimental systems depending on the desired occlusion time.
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Affiliation(s)
- Yu Kashima
- Medical Engineering, Junshin Gakuen University, Fukuoka, JPN
- Department of Emergency and Critical Care Medicine, Saga University, Saga, JPN
| | - Hiroyuki Koami
- Department of Emergency and Critical Care Medicine, Saga University, Saga, JPN
| | - Yuichiro Sakamoto
- Department of Emergency and Critical Care Medicine, Saga University, Saga, JPN
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Hong Q, Chen S, He Y, Chen J, Zhang P. Construction and validation of a prediction model for the risk of citrate accumulation in patients with hepatic insufficiency receiving continuous renal replacement therapy with citrate anticoagulation. BMC Nephrol 2024; 25:27. [PMID: 38254020 PMCID: PMC10804492 DOI: 10.1186/s12882-024-03462-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND To construct and validate a prediction model of the risk of citrate accumulation in patients with hepatic dysfunction receiving continuous renal replacement therapy with regional citrate anticoagulation (RCA-CRRT), which reduces the risk of citrate accumulation. METHODS All patients who received RCA-CRRT from 2021 to 2022 and were hospitalized in the First Affiliated Hospital of Zhejiang University were considered for study participation. Logistic regression analysis was used to identify the risk factors for citrate accumulation, based on which a nomogram model was constructed and validated in the validation group. RESULTS Six factors were finally identified, from which a nomogram was created to predict the risk of citrate accumulation. The area under the curve of the prediction model was 0.814 in the training group and 0.819 in the validation group, and the model showed acceptable agreement between the actual and predicted probabilities. Decision curve analysis also demonstrated that the model was clinically useful. CONCLUSIONS The model constructed from six factors reliably predicted the risk of citrate accumulation in patients with hepatic insufficiency who received RCA-CRRT.
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Affiliation(s)
- Quxia Hong
- Kidney Disease Center, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China
- Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, Zhejiang, China
- Department of Nephrology, Tiantai People's Hospital, Taizhou, Zhejiang, China
| | - Siyu Chen
- Kidney Disease Center, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China
- Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, Zhejiang, China
| | - Yongchun He
- Kidney Disease Center, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China
- Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, Zhejiang, China
| | - Jianghua Chen
- Kidney Disease Center, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China
- Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, Zhejiang, China
| | - Ping Zhang
- Kidney Disease Center, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
- Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China.
- Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang, China.
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, Zhejiang, China.
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Köstekci YE, Kendirli T, Gün E, Uçmak H, Demirtaş F, Havan M, Köse E, Okulu E, Eminoğlu FT, Erdeve Ö, Atasay B, Arsan S. Evaluation of the efficacy and associated complications of regional citrate anticoagulation in neonates: experience from a fourth level neonatal intensive care unit. Eur J Pediatr 2023; 182:4897-4908. [PMID: 37597047 DOI: 10.1007/s00431-023-05162-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
Continuous kidney replacement therapy (CKRT) use has increased in recent years, but anticoagulation is a challenge for neonates. Regional citrate anticoagulation (RCA) is rarely preferred in neonates because of citrate accumulation (CA) and metabolic complications. We aimed to demonstrate the efficacy and safety of RCA in neonates. We retrospectively analyzed the medical records of 11 neonates treated with RCA-CKRT between 2018 and 2023. The initial dose of RCA was 2.1-3 mmol/l, and then, its dose was increased according to the level of ionized calcium (iCa+2) in the circuit and patients. The total/iCa+2 ratio after-treatment > 2.5 was indicated as CA. We evaluated to citrate dose, CA, circuit lifespan, and dialysis effectivity. The median gestational age was 39 (36.4-41.5) weeks, the median body weight (BW) was 3200 (2400-4000) grams, and the mean postnatal age was 4 (2-24) days. The most common indication for CKRT was hyperammonemia (73%). All neonates had metabolic acidosis and hypocalcemia during CKRT. Other common metabolic complications were hypophosphatemia (90%), hypokalemia (81%), and hypomagnesemia (63%). High dialysate rates with a median of 5765 ml/h/1.73 m2 allowed for a rapid decrease in ammonia levels to normal. Four patients (36.3%) had CA, and seven (63.7%) did not (non-citrate accumulation, NCA). Mean BW, median postnatal age, biochemical parameters, coagulation tests, and ammonia levels were similar between the CA and NCA groups. Low pH, low HCO3, high lactate, and SNAPPE-II scores could be associated with a higher T/iCa ratio. CONCLUSION RCA was an efficient and safe anticoagulation for neonates requiring CKRT. Metabolic complications may occur, but they could be managed with adequate supplementation. WHAT IS KNOWN • Continuous kidney replacement therapy (CKRT) has become popular in recent years due to its successful treatment of fluid overload, electrolyte imbalance, metabolic acidosis, multi-organ failure, and hyperleucinemia/hyperammonemia associated with inborn errors of metabolism. • The need for anticoagulation is the major difficulty in neonatal CKRT. In adult and pediatric patients, regional citrate anticoagulation has been shown to be effective. WHAT IS NEW • RCA is an effective and safe anticoagulation method for neonates who require CKRT. • Electrolyte imbalances and metabolic acidosis could be managed with adequate supplementation and appropriate treatment parameters such as citrate dose, blood flow rate, and dialysate flow rate.
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Affiliation(s)
- Yasemin Ezgi Köstekci
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey.
| | - Tanıl Kendirli
- Division of Pediatric Intensive Care, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Emrah Gün
- Division of Pediatric Intensive Care, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Hacer Uçmak
- Division of Pediatric Intensive Care, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Ferhan Demirtaş
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey
| | - Merve Havan
- Division of Pediatric Intensive Care, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Engin Köse
- Division of Pediatric Metabolism, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Emel Okulu
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey
| | - Fatma Tuba Eminoğlu
- Division of Pediatric Metabolism, Department of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Ömer Erdeve
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey
| | - Begüm Atasay
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey
| | - Saadet Arsan
- Division of Neonatology, Department of Pediatrics, Ankara University Faculty of Medicine, 06590, Mamak, Ankara, Turkey
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Boer W, Verbrugghe W, Hoste E, Jacobs R, Jorens PG. Unapparent systemic effects of regional anticoagulation with citrate in continuous renal replacement therapy: a narrative review. Ann Intensive Care 2023; 13:16. [PMID: 36899104 PMCID: PMC10006386 DOI: 10.1186/s13613-023-01113-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/20/2023] [Indexed: 03/12/2023] Open
Abstract
The use of citrate, through reversible binding of calcium, has become the preferred choice for anticoagulation in continuous renal replacement therapy in the critically ill patient. Though generally considered as very efficacious in acute kidney injury, this type of anticoagulation can cause acid-base disorders as well as citrate accumulation and overload, phenomena which have been well described. The purpose of this narrative review is to provide an overview of some other, non-anticoagulation effects of citrate chelation during its use as anticoagulant. We highlight the effects seen on the calcium balance and hormonal status, phosphate and magnesium balance, as well as oxidative stress resulting from these unapparent effects. As most of these data on these non-anticoagulation effects have been obtained in small observational studies, new and larger studies documenting both short- and long-term effects should be undertaken. Subsequent future guidelines for citrate-based continuous renal replacement therapy should take not only the metabolic but also these unapparent effects into account.
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Affiliation(s)
- Willem Boer
- Department of Anaesthesiology, Intensive Care Medicine, Emergency Medicine & Pain Medicine, Ziekenhuis Oost Limburg ZOL, Genk, Belgium.
| | - Walter Verbrugghe
- Department of Critical Care Medicine, Antwerp University Hospital, University of Antwerp, Edegem, Belgium
| | - Eric Hoste
- Intensive Care Unit, Department of Internal Medicine and Paediatrics, Ghent University Hospital, Ghent, and Research Foundation Flanders (FWO), Ghent University, Brussels, Belgium
| | - Rita Jacobs
- Department of Critical Care Medicine, Antwerp University Hospital, University of Antwerp, Edegem, Belgium
| | - Philippe G Jorens
- Department of Critical Care Medicine, Antwerp University Hospital, LEMP, University of Antwerp, Edegem, Belgium
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Wang H, Zhu J, Xia Y, Li Y, Fu C. Application of platelet-rich plasma in spinal surgery. Front Endocrinol (Lausanne) 2023; 14:1138255. [PMID: 37008931 PMCID: PMC10057539 DOI: 10.3389/fendo.2023.1138255] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/27/2023] [Indexed: 03/17/2023] Open
Abstract
With the aging of the population and changes in lifestyle, the incidence of spine-related diseases is increasing, which has become a major global public health problem; this results in a huge economic burden on the family and society. Spinal diseases and complications can lead to loss of motor, sensory, and autonomic functions. Therefore, it is necessary to identify effective treatment strategies. Currently, the treatment of spine-related diseases includes conservative, surgical, and minimally invasive interventional therapies. However, these treatment methods have several drawbacks such as drug tolerance and dependence, adjacent spondylosis, secondary surgery, infection, nerve injury, dural rupture, nonunion, and pseudoarthrosis. Further, it is more challenging to promote the regeneration of the interstitial disc and restore its biomechanical properties. Therefore, clinicians urgently need to identify methods that can limit disease progression or cure diseases at the etiological level. Platelet-rich plasma (PRP), a platelet-rich form of plasma extracted from venous blood, is a blood-derived product. Alpha granules contain a large number of cytokines, such as platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), epidermal growth factor, platelet factor 4 (PF-4), insulin-like growth factor-1 (IGF-1), and transforming growth factor-β (TGF-β). These growth factors allow stem cell proliferation and angiogenesis, promote bone regeneration, improve the local microenvironment, and enhance tissue regeneration capacity and functional recovery. This review describes the application of PRP in the treatment of spine-related diseases and discusses the clinical application of PRP in spinal surgery.
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Anstey CM, Venkatesh B. A Comparison of the Commonly Used Surrogate Markers for Citrate Accumulation and Toxicity during Continuous Renal Replacement Therapy with Regional Citrate Anticoagulation. Blood Purif 2022; 51:997-1005. [PMID: 35443247 DOI: 10.1159/000524129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 03/16/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Continuous renal replacement therapy using regional citrate anticoagulation is commonly used as a modality of organ support in the critically ill population. Currently, citrate accumulation or toxicity is assessed using surrogate markers, notably the uncorrected total-to-ionized calcium ration. The accuracy and utility of this method have been questioned. OBJECTIVES/AIMS The aim of this study was to compare the surrogate markers used for assessing citrate accumulation or toxicity using the measurement of plasma citrate as the gold standard. METHODS Blood was sampled from 20 patients before, during, and after episodes of filtration with citrate concentration measured using spectrophotometry. Demographic and other clinical and biochemical data were also collected. According to protocol, a 15 mmol/L solution of trisodium citrate was used as the prefilter anticoagulant. Results were analyzed using STATA (v16.0) and presented as mean (SD), median (IQR), or simple proportion. Univariate linear regression using citrate concentration as the dependent variable was performed with all surrogate markers. RESULTS Twenty patients (17 males) were enrolled in the study with a mean (SD) age of 62.7 (9.9) years. The uncorrected calcium ratio had the best fit to the citrate data with an R2 value of 0.39. The albumin-corrected calcium ratio, pH, anion gap (AG), albumin-corrected AG, standard base excess, and strong ion gap all had R2 values less than 0.05. CONCLUSION(S) In the absence of direct measurement of citrate concentration, uncorrected total-to-ionized calcium ratio is superior to other surrogate markers, though not ideal, in assessing citrate accumulation or toxicity.
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Affiliation(s)
- Chris M Anstey
- School of Medicine, Sunshine Coast Campus, Griffith University, Birtinya, Queensland, Australia
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Xin X, Tang J, Jia HM, Zhang TE, Zheng Y, Huang LF, Ding Q, Li JC, Guo SY, Li WX. Development of a Multivariable Prediction Model for Citrate Accumulation in Liver Transplant Patients Undergoing Continuous Renal Replacement Therapy with Regional Citrate Anticoagulation. Blood Purif 2021; 51:111-121. [PMID: 33951630 DOI: 10.1159/000513947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 12/16/2020] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Patients with impaired citrate metabolism may experience citrate accumulation (CA), which causes life-threatening metabolic acidosis and hypocalcemia. CA poses a challenge for clinicians when deciding on the use of regional citrate anticoagulation (RCA) for patients with liver dysfunction. This study aimed to develop a prediction model integrating multiple clinical variables to assess the risk of CA in liver transplant patients. METHODS This single-center prospective cohort study included postoperative liver transplant patients who underwent continuous renal replacement therapy (CRRT) with RCA. The study end point was CA. A prediction model was developed using a generalized linear mixed-effect model based on the Akaike information criterion. The predictive values were assessed using the receiver operating characteristic curve and bootstrap resampling (times = 500) to estimate the area under the curve (AUC) and the corresponding 95% confidence interval (CI). A nomogram was used to visualize the model. RESULTS This study included 32 patients who underwent 133 CRRT sessions with RCA. CA occurred in 46 CRRT sessions. The model included lactate, norepinephrine >0.1 μg/kg/min, alanine aminotransferase, total bilirubin, and standard bicarbonate, which were tested before starting each CRRT session and body mass index, diabetes mellitus, and chronic kidney disease as predictors. The AUC of the model was 0.867 (95% CI 0.786-0.921), which was significantly higher than that of the single predictor (p < 0.05). A nomogram visualized the prediction model. CONCLUSIONS The prediction model integrating multiple clinical variables showed a good predictive value for CA. A nomogram visualized the model for easy application in clinical practice.
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Affiliation(s)
- Xin Xin
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Jing Tang
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Hui-Miao Jia
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Tian-En Zhang
- Department of Health Science, Gettysburg College, Gettysburg, Pennsylvania, USA
| | - Yue Zheng
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Li-Feng Huang
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Qi Ding
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Jun-Cong Li
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Shu-Yan Guo
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Wen-Xiong Li
- Surgical Intensive Care Unit, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
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Honore PM, Rimmelé T. Total-to-ionized calcium ratio, taken alone, is no longer valid to diagnose citrate accumulation! What additional parameters should we consider to strengthen the utility of this ratio? J Crit Care 2020; 59:172-175. [PMID: 32679468 DOI: 10.1016/j.jcrc.2020.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/14/2020] [Accepted: 06/16/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick M Honore
- Professor of Medicine, ICU Department, Centre Hospitalier Universitaire Brugmann, Brussels, Belgium.
| | - Thomas Rimmelé
- Professor of Medicine, Head of Anesthesiology and Criticial Care Medicine Department, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France.
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