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Prajapati M, Trivedi V, Prajapati D, Bhosale G, Nayak J, Panchal H. Is Inferior vena cava diameter, a reliable indicator for fluid status in end-stage renal disease patients? - A prospective observational study. INDIAN JOURNAL OF TRANSPLANTATION 2022. [DOI: 10.4103/ijot.ijot_32_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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2
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Akinjero A, Chulani S, Ahmad S. Utilizing a novel point of care ultrasound (POCUS) protocol to guide diuresis – A case series. Respir Med Case Rep 2022; 38:101695. [PMID: 35799865 PMCID: PMC9253641 DOI: 10.1016/j.rmcr.2022.101695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/21/2022] [Indexed: 11/11/2022] Open
Abstract
Volume assessment is an important, but challenging but crucial aspect of patient care. Fluid balance is affected by volume expansion, sepsis/shock states, cardiac and kidney failure and is present in the majority of patients. Similarly, in critically ill patients on diuretics, both excessive and inadequate diuresis can worsen outcomes. Chest X-ray (CXR) and auscultation are poorly predictive of volume status, while bioimpedance and blood volume monitoring have limitations at the bedside [4]. Inferior vena cava (IVC) diameter as measured by POCUS is a marker of intravascular volume that can provide a real-time assessment to guide diuresis. The Reverse Falls Protocol combines lung and IVC US to enable the clinician to visualize, in real-time, the patient's intravascular and extravascular volume and to set diuresis goals. We present a series of cases where euvolemia was achieved using the principles described by O'Hara, Chabra & Ahmad's Reverse Falls Protocol.
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3
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Elhassan MG, Chao PW, Curiel A. The Conundrum of Volume Status Assessment: Revisiting Current and Future Tools Available for Physicians at the Bedside. Cureus 2021; 13:e15253. [PMID: 34188992 PMCID: PMC8231469 DOI: 10.7759/cureus.15253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Assessment of patients’ volume status at the bedside is a very important clinical skill that physicians need in many clinical scenarios. Hypovolemia with hypotension and tissue under-perfusion are usually more alarming to physicians, but hypervolemia is also associated with poor outcomes, making euvolemia a crucial goal in clinical practice. Nevertheless, the assessment of volume status can be challenging, especially in the absence of a gold standard test that is reliable and easily accessible to assist with clinical decision-making. Physicians need to have a broad knowledge of the individual non-invasive clinical tools available for them at the bedside to evaluate volume status. In this review, we will discuss the strengths and limitations of the traditional tools, which include careful history taking, physical examination, and basic laboratory tests, and also include the relatively new tool of point-of-care ultrasound.
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Affiliation(s)
| | - Peter W Chao
- Internal Medicine, Saint Agnes Medical Center, Fresno, USA
| | - Argenis Curiel
- Internal Medicine, Saint Agnes Medical Center, Fresno, USA
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4
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Suarez J, Niyyar VD. Lung Ultrasound: A "Biomarker" for Fluid Overload? Adv Chronic Kidney Dis 2021; 28:200-207. [PMID: 34906304 DOI: 10.1053/j.ackd.2021.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/18/2021] [Accepted: 03/09/2021] [Indexed: 11/11/2022]
Abstract
Fluid overload is associated with poor outcomes in patients with acute kidney injury as well as end-stage kidney disease. Lung ultrasound (LUS) has been used in many different settings and specialties including the emergency department, intensive care unit, trauma, cardiology, and nephrology. Although LUS has been a valuable tool in assessing pulmonary congestion, LUS findings may not always be pathognomonic for pulmonary congestion. Furthermore, the feasibility of doing an extensive LUS examination as has been done in research studies may be hard to implement within the clinical setting. This review will go over the use of LUS to evaluate for fluid overload, compare LUS with other markers of fluid overload, review limitations of LUS, and suggest potential future directions in the use of LUS in nephrology.
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5
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Kammar-García A, Castillo-Martínez L, Villanueva-Juárez JL, Pérez-Pérez A, Rocha-González HI, Arrieta-Valencia J, Remolina-Schlig M, Hernández-Gilsoul T. Comparison of Bioelectrical Impedance Analysis Parameters for the Detection of Fluid Overload in the Prediction of Mortality in Patients Admitted at the Emergency Department. JPEN J Parenter Enteral Nutr 2020; 45:414-422. [PMID: 32441793 DOI: 10.1002/jpen.1848] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 04/03/2020] [Accepted: 04/08/2020] [Indexed: 01/29/2023]
Abstract
BACKGROUND Fluid overload (FO) in critically ill patients is associated with increased adverse events. This study aims to compare different bioelectrical impedance analysis (BIA) parameters that demonstrate FO and their association with 30-day mortality in critical patients admitted to the emergency department (ED). METHODS Five components of the BIA were obtained by multifrequency device-total body water (TBW), extracellular water (ECW), intracellular water (ICW), resistance (R), and reactance (Xc)-to calculate parameters (impedance vectors, impedance ratio, and the ratios of ECW to TBW, ECW to ICW, ECW to body surface area, TBW to height2 , ICW to height2 , Xc to height, and R to height) that have been used for the detection of FO. A concordance analysis (κ) was performed comparing every parameter with each other. Furthermore, different regression models (Cox regression) were created associating the FO for each parameter with 30-day mortality, adjusted for age, body mass index, sex, Sequential Organ Failure Assessment score, and serum albumin level. RESULTS A total of 142 patients were included in the study. Only FO by impedance vector analysis (relative risk [RR] = 6.4; 95% CI, 1.5-27.9; P = .01), impedance ratio (RR = 2.7; 95% CI, 1.1-7.1; P = .04), and R (RR = 2.6; 95% CI, 1.2-5.5; P = .02) increased the probability of 30-day mortality. CONCLUSIONS Different parameters that determine FO by BIA were associated with the mortality of patients admitted to the ED, but the impedance vector analysis was superior to any other parameter of the BIA.
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Affiliation(s)
- Ashuin Kammar-García
- Emergency Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México.,Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Lilia Castillo-Martínez
- Department of Clinical Nutrition, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - José Luis Villanueva-Juárez
- Department of Clinical Nutrition, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Anayeli Pérez-Pérez
- Emergency Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Héctor Isaac Rocha-González
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Jesús Arrieta-Valencia
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Miguel Remolina-Schlig
- Emergency Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Thierry Hernández-Gilsoul
- Emergency Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
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6
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Canaud B, Chazot C, Koomans J, Collins A. Fluid and hemodynamic management in hemodialysis patients: challenges and opportunities. ACTA ACUST UNITED AC 2020; 41:550-559. [PMID: 31661543 PMCID: PMC6979572 DOI: 10.1590/2175-8239-jbn-2019-0135] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 07/08/2019] [Indexed: 02/07/2023]
Abstract
Fluid volume and hemodynamic management in hemodialysis patients is an essential component of dialysis adequacy. Restoring salt and water homeostasis in hemodialysis patients has been a permanent quest by nephrologists summarized by the ‘dry weight’ probing approach. Although this clinical approach has been associated with benefits on cardiovascular outcome, it is now challenged by recent studies showing that intensity or aggressiveness to remove fluid during intermittent dialysis is associated with cardiovascular stress and potential organ damage. A more precise approach is required to improve cardiovascular outcome in this high-risk population. Fluid status assessment and monitoring rely on four components: clinical assessment, non-invasive instrumental tools (e.g., US, bioimpedance, blood volume monitoring), cardiac biomarkers (e.g. natriuretic peptides), and algorithm and sodium modeling to estimate mass transfer. Optimal management of fluid and sodium imbalance in dialysis patients consist in adjusting salt and fluid removal by dialysis (ultrafiltration, dialysate sodium) and by restricting salt intake and fluid gain between dialysis sessions. Modern technology using biosensors and feedback control tools embarked on dialysis machine, with sophisticated analytics will provide direct handling of sodium and water in a more precise and personalized way. It is envisaged in the near future that these tools will support physician decision making with high potential of improving cardiovascular outcome.
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Affiliation(s)
- Bernard Canaud
- Montpellier University, Montpellier, France.,Senior Medical Scientist, Global Medical Office, FMC Deutschland, Bad Homburg, Germany
| | - Charles Chazot
- Head of Clinical Governance, NephroCare France, Fresnes, France
| | - Jeroen Koomans
- Maastricht University Medical Center, Department of Internal Medicine, Division of Nephrology, Netherlands
| | - Allan Collins
- University of Minnesota, Minneapolis Minnesota, USA.,Senior Medical Scientist, Global Medical Office, FMC North America, Waltham, MA, USA
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7
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Doulton TWR, Swift PA, Murtaza A, Dasgupta I. Uncertainties in BP management in dialysis patients. Semin Dial 2020; 33:223-235. [PMID: 32285984 DOI: 10.1111/sdi.12880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 03/12/2020] [Indexed: 12/21/2022]
Abstract
Hypertension in dialysis patients is extremely common. In this article, we review the current evidence for blood pressure (BP) goals in hemodialysis patients, and consider the effectiveness of interventions by which BP may be lowered, including manipulation of dietary and dialysate sodium; optimization of extracellular water; prolongation of dialysis time; and antihypertensive medication. Although two meta-analyses suggest lowering BP using antihypertensive drugs might be beneficial in reducing cardiovascular events and mortality, there are insufficient rigorously designed trials in hypertensive hemodialysis populations to determine preferred antihypertensive drug classes. We suggest aiming for predialysis systolic BP between 130 and 159 mm Hg, while at the same time acknowledge the significant limitations of the data upon which it is based. We conclude by summarizing current knowledge as regards management of hypertension in the peritoneal dialysis population and make recommendations for future research in this field.
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Affiliation(s)
- Timothy W R Doulton
- Department of Renal Medicine, East Kent Hospitals University NHS Foundation Trust, Canterbury, Kent, UK
| | - Pauline A Swift
- Department of Nephrology, Epsom and St Helier University Hospitals NHS Trust, Carshalton, Surrey, UK
| | - Asam Murtaza
- Renal Unit, University Hospitals Birmingham NHS Trust, Birmingham, UK
| | - Indranil Dasgupta
- Renal Unit, University Hospitals Birmingham NHS Trust, Birmingham, UK.,Warwick Medical School, University of Warwick, Warwick, UK
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8
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Menon LP, Balakrishnan JM, Wilson W, Thomas MK. Caval Aortic Index: A Novel Tool for Fluid Assessment in Obstetric Emergencies. J Emerg Trauma Shock 2020; 13:50-53. [PMID: 32395050 PMCID: PMC7204966 DOI: 10.4103/jets.jets_136_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 05/31/2019] [Indexed: 11/25/2022] Open
Abstract
Background: Uncorrected maternal hypotension occurring during obstetric emergencies may result in maternal and fetal morbidity. Fluid status of the pregnant mother is a major variable which affects the maternal hemodynamics during patient management, and there is no objective assessment tool for the same. A relatively new sonographic parameter, the inferior vena cava aorta (IVC/Ao) diameter index or caval aortic index, showed promise in this regard, and its application was studied in obstetric patients. Methodology: A prospective analytical study was conducted involving 50 pregnant and 50 nonpregnant women of reproductive age group. Using both subxiphoid and transhepatic views, their normal fasting caval aortic indices were determined from the ratio of mean IVC diameter to the mean aortic diameter. Descriptive and inferential statistical analyses were carried out accordingly. Results: Normal IVC/Ao diameter index for nonpregnant healthy women of reproductive age was 1.11 ± 0.29 in the subxiphoid view and 1.21 ± 0.33 in the transhepatic view. The difference between the two views was not statistically significant. IVC/Ao diameter index for a normal term pregnant woman was 1.03 ± 0.26, and term pregnancy does not significantly cause variation in the index. Conclusions: Caval aortic index is a useful noninvasive tool to assess volume status and guide fluid management in pregnant women presenting to the emergency department, and the transhepatic view is comparable to the traditional subxiphoid view for the measurement of the same.
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Affiliation(s)
- Lakshmi Priya Menon
- Department of Anaesthesiology and Critical Care, Aster Medcity, Cochin, Kerala, India
| | - Jayaraj Mymbilly Balakrishnan
- Department of Emergency Medicine, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - William Wilson
- Department of Emergency Medicine, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Mariam Koshi Thomas
- Department of Anesthesiology, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
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9
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Colucci LA, Corapi KM, Li M, Parada XV, Allegretti AS, Lin HY, Ausiello DA, Rosen MS, Cima MJ. Fluid assessment in dialysis patients by point-of-care magnetic relaxometry. Sci Transl Med 2019; 11:eaau1749. [PMID: 31341060 PMCID: PMC8129985 DOI: 10.1126/scitranslmed.aau1749] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/12/2019] [Accepted: 05/23/2019] [Indexed: 01/12/2023]
Abstract
Magnetic resonance imaging (MRI) is a powerful diagnostic tool, but its use is restricted to the scanner suite. Here, we demonstrate that a bedside nuclear magnetic resonance (NMR) sensor can assess fluid status changes in individuals at a fraction of the time and cost compared to MRI. Our study recruited patients with end-stage renal disease (ESRD) who were regularly receiving hemodialysis treatments with intradialytic fluid removal as a model of volume overload and healthy controls as a model of euvolemia. Quantitative T 2 measurements of the lower leg of patients with ESRD immediately before and after dialysis were compared to those of euvolemic healthy controls using both a 0.28-T bedside single-voxel NMR sensor and a 1.5-T clinical MRI scanner. In the MRI data, we found that the first sign of fluid overload was an expanded muscle extracellular fluid (ECF) space, a finding undetectable at this stage using physical exam. A decrease in muscle ECF upon fluid removal was similarly detectable with both the bedside sensor and MRI. Bioimpedance measurements performed comparably to the bedside NMR sensor but were generally worse than MRI. These findings suggest that bedside NMR may be a useful method to identify fluid overload early in patients with ESRD and potentially other hypervolemic patient populations.
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Affiliation(s)
- Lina A Colucci
- Harvard-MIT Division of Health Sciences and Technology (HST), Cambridge, MA 02139, USA
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kristin M Corapi
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Matthew Li
- Harvard-MIT Division of Health Sciences and Technology (HST), Cambridge, MA 02139, USA
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xavier Vela Parada
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Andrew S Allegretti
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Herbert Y Lin
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Dennis A Ausiello
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Matthew S Rosen
- A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA 02129, USA
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Michael J Cima
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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10
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Lucas BP, D'Addio A, Block C, Manning H, Remillard B, Leiter JC. Limited agreement between two noninvasive measurements of blood volume during fluid removal: ultrasound of inferior vena cava and finger-clip spectrophotometry of hemoglobin concentration. Physiol Meas 2019; 40:065003. [PMID: 31091520 DOI: 10.1088/1361-6579/ab21af] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Plots of blood volume measurements over time (profiles) may identify euvolemia during fluid removal for acute heart failure. We assessed agreement between two noninvasive measurements of blood volume profiles during mechanical fluid removal, which exemplifies the interstitial fluid shifts that occur during diuretic-induced fluid removal. APPROACH During hemodialysis we compared change in maximum diameter of the inferior vena cava by ultrasound ([Formula: see text]) to change in relative blood volume derived from capillary hemoglobin concentration from finger-clip spectrophotometry (RBVSpHb). We grouped profiles of these measurements into three distinct shapes using an unbiased, data-driven modeling technique. METHODS Fifty patients who were not in acute heart failure underwent a mean of five paired measurements while an average of 1.3 liters of fluid was removed over 2 h during single hemodialysis sessions. [Formula: see text] changed -1.0 mm (95% CI -1.9 to -0.2 mm) and the RBVSpHb changed -1.1% (95% CI -2.7 to +0.5%), but these changes were not correlated (r -0.04, 95% CI -0.32 to +0.24). Nor was there agreement between categorization of profiles of change in the two measurements (kappa -0.1, 95% CI -0.3 to +0.1). SIGNIFICANCE [Formula: see text] and RBVSpHb estimates of blood volume do not agree during mechanical fluid removal, likely because regional changes in blood flow and pressure modify IVC dimensions as well as changes total blood volume.
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Affiliation(s)
- Brian P Lucas
- Medicine Service, White River Junction VA Medical Center, White River Junction, VT, United States of America. Geisel School of Medicine at Dartmouth College, Hanover, NH, United States of America. Author to whom any correspondence should be addressed. White River Junction VA Medical Center, 215 N Main Street, White River Junction, VT, United States of America
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11
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Hocking KM, Alvis BD, Baudenbacher F, Boyer R, Brophy CM, Beer I, Eagle S. Peripheral i.v. analysis (PIVA) of venous waveforms for volume assessment in patients undergoing haemodialysis. Br J Anaesth 2019; 119:1135-1140. [PMID: 29028929 DOI: 10.1093/bja/aex271] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2017] [Indexed: 11/13/2022] Open
Abstract
Background The assessment of intravascular volume status remains a challenge for clinicians. Peripheral i.v. analysis (PIVA) is a method for analysing the peripheral venous waveform that has been used to monitor volume status. We present a proof-of-concept study for evaluating the efficacy of PIVA in detecting changes in fluid volume. Methods We enrolled 37 hospitalized patients undergoing haemodialysis (HD) as a controlled model for intravascular volume loss. Respiratory rate (F0) and pulse rate (F1) frequencies were measured. PIVA signal was obtained by fast Fourier analysis of the venous waveform followed by weighing the magnitude of the amplitude of the pulse rate frequency. PIVA was compared with peripheral venous pressure and standard monitoring of vital signs. Results Regression analysis showed a linear correlation between volume loss and change in the PIVA signal (R2=0.77). Receiver operator curves demonstrated that the PIVA signal showed an area under the curve of 0.89 for detection of 20 ml kg-1 change in volume. There was no correlation between volume loss and peripheral venous pressure, blood pressure or pulse rate. PIVA-derived pulse rate and respiratory rate were consistent with similar numbers derived from the bio-impedance and electrical signals from the electrocardiogram. Conclusions PIVA is a minimally invasive, novel modality for detecting changes in fluid volume status, respiratory rate and pulse rate in spontaneously breathing patients with peripheral i.v. cannulas.
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Affiliation(s)
- K M Hocking
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | | | - F Baudenbacher
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - R Boyer
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - C M Brophy
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - I Beer
- Medical Affairs, Baxter International Inc., Deerfield, IL, USA
| | - S Eagle
- Department of Anesthesiology
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12
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da Silva AT, Hauschild DB, de Almeida Oliveira LD, de Fragas Hinnig P, Franco Moreno YM, Wazlawik E. Association of hyperhydration evaluated by bioelectrical impedance analysis and mortality in patients with different medical conditions: Systematic review and meta-analyses. Clin Nutr ESPEN 2018; 28:12-20. [DOI: 10.1016/j.clnesp.2018.08.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 08/31/2018] [Indexed: 01/09/2023]
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13
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Mullangi S, Sozio SM, Segal P, Menez S, Martire C, Shafi T. Point-of-care ultrasound education to improve care of dialysis patients. Semin Dial 2018; 31:154-162. [PMID: 29314256 PMCID: PMC5839962 DOI: 10.1111/sdi.12664] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Point-of-care ultrasound (POCUS) is rapidly emerging as a bedside diagnostic tool that can enhance physical diagnosis and facilitate clinical decision making. Although ultrasound is widely used by nephrologists for vascular access and kidney imaging, diagnostic POCUS skills in other anatomic areas are not part of routine nephrology training. In this narrative review, we will provide an overview of selected POCUS techniques, highlight potential uses of POCUS in routine nephrology practice, and describe a new curriculum implemented at Johns Hopkins University School of Medicine to teach diagnostic POCUS skills to nephrology fellows.
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Affiliation(s)
- Surekha Mullangi
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
| | - Stephen M. Sozio
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
- Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, Maryland
| | - Paul Segal
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
| | - Steven Menez
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
| | - Carol Martire
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
- Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
| | - Tariq Shafi
- Division of Nephrology, Department of Medicine, The Johns Hopkins University, Baltimore, Maryland
- Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, Maryland
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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14
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Bianchi C, Lanzarone E, Casagrande G, Costantino ML. A Bayesian approach for the identification of patient-specific parameters in a dialysis kinetic model. Stat Methods Med Res 2018; 28:2069-2095. [PMID: 29325494 DOI: 10.1177/0962280217745572] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hemodialysis is the most common therapy to treat renal insufficiency. However, notwithstanding the recent improvements, hemodialysis is still associated with a non-negligible rate of comorbidities, which could be reduced by customizing the treatment. Many differential compartment models have been developed to describe the mass balance of blood electrolytes and catabolites during hemodialysis, with the goal of improving and controlling hemodialysis sessions. However, these models often refer to an average uremic patient, while on the contrary the clinical need for customization requires patient-specific models. In this work, we assume that the customization can be obtained by means of patient-specific model parameters. We propose and validate a Bayesian approach to estimate the patient-specific parameters of a multi-compartment model, and to predict the single patient's response to the treatment, in order to prevent intra-dialysis complications. The likelihood function is obtained by means of a discretized version of the multi-compartment model, where the discretization is in terms of a Runge-Kutta method to guarantee convergence, and the posterior densities of model parameters are obtained through Markov Chain Monte Carlo simulation. Results show fair estimations and the applicability in the clinical practice.
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Affiliation(s)
- Camilla Bianchi
- 1 Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Milan, Italy
| | - Ettore Lanzarone
- 2 Istituto di Matematica Applicata e Tecnologie Informatiche (IMATI), Consiglio Nazionale delle Ricerche (CNR), Milan, Italy
| | - Giustina Casagrande
- 1 Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Milan, Italy
| | - Maria Laura Costantino
- 1 Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Milan, Italy
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15
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Plantinga LC, King LM, Masud T, Shafi T, Burkart JM, Lea JP, Jaar BG. Burden and correlates of readmissions related to pulmonary edema in US hemodialysis patients: a cohort study. Nephrol Dial Transplant 2017; 33:1215-1223. [DOI: 10.1093/ndt/gfx335] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 11/07/2017] [Indexed: 11/12/2022] Open
Affiliation(s)
- Laura C Plantinga
- Department of Medicine, Emory University, Atlanta, GA, USA
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Laura M King
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Tahsin Masud
- Department of Medicine, Emory University, Atlanta, GA, USA
| | - Tariq Shafi
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - John M Burkart
- Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | - Janice P Lea
- Department of Medicine, Emory University, Atlanta, GA, USA
| | - Bernard G Jaar
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
- Nephrology Center of Maryland, Baltimore, MD, USA
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Sekiguchi H, Seaburg LA, Suzuki J, Astorne WJ, Patel AS, Keller AS, Gajic O, Kashani KB. Central venous pressure and ultrasonographic measurement correlation and their associations with intradialytic adverse events in hospitalized patients: A prospective observational study. J Crit Care 2017; 44:168-174. [PMID: 29132056 DOI: 10.1016/j.jcrc.2017.10.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 10/19/2017] [Accepted: 10/28/2017] [Indexed: 02/06/2023]
Abstract
PURPOSE To investigate correlation of central venous pressure (CVP) with ultrasonographic measurement of central veins, along with association between these variables and occurrence of intradialytic adverse events in hospitalized patients. MATERIALS AND METHODS Patients requiring hemodialysis via dialysis catheter were prospectively enrolled. CVP measurements through catheter, internal jugular vein aspect ratio, subclavian vein collapsibility, inferior vena cava (IVC) maximal diameter, and IVC collapsibility were recorded before and after hemodialysis. Predictive accuracy of ultrasonographic measurements in discriminating high versus low CVP and their association with intradialytic adverse events were evaluated. Area under receiver operating characteristic curves (AUCs) were calculated. RESULTS Fifty-nine patients were enrolled. Median (interquartile range) pre- and post-dialysis CVPs were 8 (4-13)mmHg and 6 (3-10)mmHg, respectively (P<0.01). In pre-dialysis, IVC collapsibility had the highest AUC (0.79, P<0.01) to predict CVP >8mmHg. In post-dialysis, IVC maximal diameter had the highest AUC (0.86, P<0.01) to predict CVP ≤4mmHg. Fifteen patients (25%) had adverse events. Neither pre-dialytic CVP nor ultrasonographic variables were associated with occurrence of adverse events. CONCLUSIONS Highest accuracy in predicting low and high CVP was observed with ultrasonographic assessment of IVC diameter and collapsibility. Adverse events were not predicted by pre-dialytic CVP or ultrasonographic measurements.
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Affiliation(s)
- Hiroshi Sekiguchi
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States.
| | - Luke A Seaburg
- Department of Internal Medicine, Mayo Clinic, Rochester, MN, United States
| | - Jun Suzuki
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States
| | - Walter J Astorne
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States; Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, United States
| | - Anil S Patel
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States
| | - A Scott Keller
- Division of Hospital Internal Medicine, Mayo Clinic, Rochester, MN, United States
| | - Ognjen Gajic
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States
| | - Kianoush B Kashani
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States; Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, United States
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Abstract
PURPOSE OF REVIEW Volume management in hemodialysis patients is often challenging. Assessing volume status and deciding how much fluid to remove during hemodialysis, the so-called ultrafiltration rate (UFR), has remained a conundrum. RECENT FINDINGS To date there is no objective assessment tool to determine the needed UFR during each hemodialysis session. Higher volume overload or higher UFR is associated with poor outcomes including worse mortality and unfavorable clinical outcomes. We suggest combined use of the following criteria to determine UFR or post-dialysis target dry weight: pre-hemodialysis blood pressure and its intradialytic changes, muscle cramps, dyspnea from pulmonary vascular congestion, peripheral edema, tachycardia or palpitation, headache or lightheadedness, perspiration, and post-dialysis fatigue. Restricting fluid and salt intake-and high-dose loop diuretic use in cases of residual kidney function-can be helpful in controlling fluid gains. More frequent and more severe hypotensive episodes are associated with poor outcomes including higher death risk.
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Affiliation(s)
- Jason A Chou
- Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine, School of Medicine, Orange, CA, USA
- Division of Nephrology, Department of Medicine, University of California, Irvine, School of Medicine, Orange, CA, USA
| | - Kamyar Kalantar-Zadeh
- Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine, School of Medicine, Orange, CA, USA.
- Division of Nephrology, Department of Medicine, University of California, Irvine, School of Medicine, Orange, CA, USA.
- Fielding School of Public Health at UCLA, Los Angeles, CA, USA.
- Los Angeles Biomedical Research Institute at Harbor-UCLA, Torrance, CA, USA.
- Harold Simmons Center for Kidney Disease Research & Epidemiology, Division of Nephrology & Hypertension, University of California Irvine, School of Medicine, 101 The City Drive South, City Tower, Suite 400-ZOT: 4088, Orange, CA, 92868-3217, USA.
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Siriopol I, Siriopol D, Voroneanu L, Covic A. Predictive abilities of baseline measurements of fluid overload, assessed by bioimpedance spectroscopy and serum N-terminal pro-B-type natriuretic peptide, for mortality in hemodialysis patients. Arch Med Sci 2017; 13:1121-1129. [PMID: 28883854 PMCID: PMC5575229 DOI: 10.5114/aoms.2017.68993] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 03/04/2017] [Indexed: 02/05/2023] Open
Abstract
INTRODUCTION Fluid overload is one of the most important, yet modifiable, risk factors associated with worse outcomes in hemodialysis (HD) patients. However, its precise assessment in clinical practice is still under investigation. MATERIAL AND METHODS This is an observational prospective study which included 285 stable patients with end-stage renal disease on standard thrice-weekly HD therapy. Overhydration was assessed by the combination of relative fluid overload (RFO), using bioimpedance spectroscopy, and N-terminal pro-B-type natriuretic peptide (NT-proBNP). The outcome of interest was all-cause mortality. RESULTS The median values for NT-proBNP and RFO were 4595 pg/ml and 6.9%, respectively. We divided the study population into four groups according to these median levels: group 1 - low NT-proBNP and low RFO; group 2 - high NT-proBNP and low RFO; group 3 - low NT-proBNP and high RFO; group 4 - high NT-proBNP and high RFO. During the follow-up (mean: 41.1, median: 48.7 months), 89 (31.2%) patients died. In the univariable Cox survival analysis only patients in group 4, and not those from group 2 or 3, had significantly higher HRs as compared to those in group 1 (HR = 1.5, 95% CI: 0.8-2.8, HR = 1.6, 95% CI: 0.8-2.9 and HR = 2.4, 95% CI: 1.3-4.2, for group 2, 3 and 4, respectively). Furthermore, these results were maintained in the multivariable Cox analysis. CONCLUSIONS Including both bioimpedance and NT-proBNP monitoring in a more comprehensive fluid status assessment could improve the diagnosis of fluid overload with a final improvement in patients' outcome.
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Affiliation(s)
- Ianis Siriopol
- Intensive Care Unit Department, Regional Institute of Oncology, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Dimitrie Siriopol
- Nephrology Department, Dialysis and Renal Transplant Center, “Dr. C.I. Parhon” University Hospital, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Luminita Voroneanu
- Nephrology Department, Dialysis and Renal Transplant Center, “Dr. C.I. Parhon” University Hospital, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Adrian Covic
- Nephrology Department, Dialysis and Renal Transplant Center, “Dr. C.I. Parhon” University Hospital, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
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Milani GP, Groothoff JW, Vianello FA, Fossali EF, Paglialonga F, Edefonti A, Agostoni C, Consonni D, van Harskamp D, van Goudoever JB, Schierbeek H, Oosterveld MJS. Bioimpedance and Fluid Status in Children and Adolescents Treated With Dialysis. Am J Kidney Dis 2017; 69:428-435. [PMID: 28089477 DOI: 10.1053/j.ajkd.2016.10.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 10/09/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND Assessment of hydration status in patients with chronic kidney failure treated by dialysis is crucial for clinical management decisions. Dilution techniques are considered the gold standard for measurement of body fluid volumes, but they are unfit for day-to-day care. Multifrequency bioimpedance has been shown to be of help in clinical practice in adults and its use in children and adolescents has been advocated. We investigated whether application of multifrequency bioimpedance is appropriate for total-body water (TBW) and extracellular water (ECW) measurement in children and adolescents on dialysis therapy. STUDY DESIGN A study of diagnostic test accuracy. SETTING & PARTICIPANTS 16 young dialysis patients (before a hemodialysis session or after peritoneal dialysis treatment) from the Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy, and the Emma Children's Hospital-Academic Medical Center, Amsterdam, the Netherlands. INDEX TEST TBW and ECW volumes assessed by multifrequency bioimpedance. REFERENCE TESTS TBW and ECW volumes measured by deuterium and bromide dilution, respectively. RESULTS Mean TBW volumes determined by multifrequency bioimpedance and deuterium dilution were 19.2±8.7 (SD) and 19.3±8.3L, respectively; Bland-Altman analysis showed a mean bias between the 2 methods of -0.09 (95% limits of agreement, -2.1 to 1.9) L. Mean ECW volumes were 8.9±4.0 and 8.3±3.3L measured by multifrequency bioimpedance and bromide dilution, respectively; mean bias between the 2 ECW measurements was +0.6 (95% limits of agreement, -2.3 to 3.5). LIMITATIONS Participants ingested the deuterated water at home without direct supervision by investigators, small number of patients, repeated measurements in individual patients were not performed. CONCLUSIONS Multifrequency bioimpedance measurements were unbiased but imprecise in comparison to dilution techniques. We conclude that multifrequency bioimpedance measurements cannot precisely estimate TBW and ECW in children receiving dialysis.
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Affiliation(s)
- Gregorio P Milani
- Department of Pediatrics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
| | - Jaap W Groothoff
- Pediatric Nephrology, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands
| | - Federica A Vianello
- Department of Pediatrics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Emilio F Fossali
- Department of Pediatrics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Fabio Paglialonga
- Department of Pediatric Nephrology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alberto Edefonti
- Department of Pediatric Nephrology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Carlo Agostoni
- Department of Pediatrics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Dario Consonni
- Epidemiology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Dewi van Harskamp
- Pediatrics, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands
| | - Johannes B van Goudoever
- Pediatrics, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands; Pediatrics VU University Medical Center, Amsterdam, the Netherlands
| | - Henk Schierbeek
- Pediatrics, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands
| | - Michiel J S Oosterveld
- Pediatric Nephrology, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands
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20
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Seminars in Dialysis: The 100 Most Highly Cited Papers. Semin Dial 2016; 29:518-520. [PMID: 27774673 DOI: 10.1111/sdi.12536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Prencipe M, Granata A, D'Amelio A, Romano G, Aucella F, Fiorini F. Usefulness of US imaging in overhydrated nephropathic patients. J Ultrasound 2016; 19:7-13. [PMID: 26941871 DOI: 10.1007/s40477-014-0152-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 11/28/2014] [Indexed: 10/24/2022] Open
Abstract
Achievement of a normal hydration status is one of the major targets of hemodialysis. It is based on the estimation of "dry weight", the term used to define normal body fluid content. The concept of dry weight in hemodialysis patients is clinically undisputed, but it is not always easy to achieve in this population. Assessment of hydration status by clinical evaluation is imprecise and often unreliable. Measurement of the inferior vena cava (IVC) diameter has been shown to reflect individual fluid status. The relationship between variation in IVC diameter before and after hemodialysis session and weight loss has been investigated. Ultrasound (US) measurement of the IVC diameter is considered a valid measure of the hydration status and is routinely used in hemodialysis patients. Moreover, a relationship between IVC diameter, respiratory activity and hydration status, evaluated by considering both plasma volume and central venous pressure, has been demonstrated. In conclusion, assessment of hydration status based on blood pressure and central venous pressure can be considered reliable only in patients without signs of heart failure.
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Affiliation(s)
- Michele Prencipe
- Nephrology and Dialysis Unit, "Casa Sollievo della Sofferenza" Hospital, San Giovanni Rotondo, Foggia Italy
| | - Antonio Granata
- Nephrology and Dialysis Unit, "St. Giovanni di Dio" Hospital, C.da Consolida, 92100 Agrigento, Italy ; Advanced School of Ultrasonography in Nephrology - SIUMB, Milan, Italy
| | | | - Giulia Romano
- Internal Medicine Unit, AOU "Vittorio Emanuele-Policlinico", Catania, Italy
| | - Filippo Aucella
- Nephrology and Dialysis Unit, "Casa Sollievo della Sofferenza" Hospital, San Giovanni Rotondo, Foggia Italy
| | - Fulvio Fiorini
- Nephrology and Dialysis Unit, "S. M. della Misericordia" Hospital, ASL 18, Rovigo, Italy ; Advanced School of Ultrasonography in Nephrology - SIUMB, Milan, Italy
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23
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Paudel K, Kausik T, Visser A, Ramballi C, Fan SL. Comparing lung ultrasound with bioimpedance spectroscopy for evaluating hydration in peritoneal dialysis patients. Nephrology (Carlton) 2015; 20:1-5. [PMID: 25231593 DOI: 10.1111/nep.12342] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND Bioimpedance spectroscopy (BIS), ultrasound lung comets (ULC) and serum biomarkers (N-terminal pro-brain natriuretic peptide, NT-proBNP) have all been used to assist clinicians to determine hydration status in dialysis patients. METHODS We performed simultaneous BIS, ULC and NT-proBNP measurements in 27 peritoneal dialysis patients to determine the concordance of the three methods. RESULTS Patients with evidence of increasing lung congestion (as determined by ultrasound) were more likely to be diabetic, have systolic hypertension and have higher NT-proBNP (r = 0.65, P < 0.0005). Although there was a trend for patients with high ULC to be overhydrated as determined by BIS, this did not reach statistical significance. Moreover, the correlation between BIS and NT-proBNP (though statistically significant at r = 0.47, P < 0.02) appeared to be weaker. CONCLUSION BIS and ULC may be complementary, providing different information, whereas BIS may be more specific to hydration. ULC and NT-proBNP may indicate left ventricular failure coexisting with overhydration.
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Affiliation(s)
- Klara Paudel
- Department of Renal Medicine and Transplantation, Barts Health NHS Trust, London, UK
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24
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Application of design of experiments in hemodialysis: Optimal sampling protocol for β2-microglobulin kinetic model. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.03.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Dąbrowski W, Kotlinska-Hasiec E, Jaroszynski A, Zadora P, Pilat J, Rzecki Z, Zaluska W, Schneditz D. Intra-abdominal pressure correlates with extracellular water content. PLoS One 2015; 10:e0122193. [PMID: 25849102 PMCID: PMC4388733 DOI: 10.1371/journal.pone.0122193] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 02/12/2015] [Indexed: 12/24/2022] Open
Abstract
Background Secondary increase in intra-abdominal pressure (IAP) may result from extra-abdominal pathology, such as massive fluid resuscitation, capillary leak or sepsis. All these conditions increase the extravascular water content. The aim of this study was to analyze the relationship between IAP and body water volume. Material and Methods Adult patients treated for sepsis or septic shock with acute kidney injury (AKI) and patients undergoing elective pharyngolaryngeal or orthopedic surgery were enrolled. IAP was measured in the urinary bladder. Total body water (TBW), extracellular water content (ECW) and volume excess (VE) were measured by whole body bioimpedance. Among critically ill patients, all parameters were analyzed over three consecutive days, and parameters were evaluated perioperatively in surgical patients. Results One hundred twenty patients were studied. Taken together, the correlations between IAP and VE, TBW, and ECW were measured at 408 time points. In all participants, IAP strongly correlated with ECW and VE. In critically ill patients, IAP correlated with ECW and VE. In surgical patients, IAP correlated with ECW and TBW. IAP strongly correlated with ECW and VE in the mixed population. IAP also correlated with VE in critically ill patients. ROC curve analysis showed that ECW and VE might be discriminative parameters of risk for increased IAP. Conclusion IAP strongly correlates with ECW.
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Affiliation(s)
- Wojciech Dąbrowski
- Department of Anesthesiology and Intensive Therapy Medical University of Lublin, Lublin, Poland
- * E-mail:
| | - Edyta Kotlinska-Hasiec
- Department of Anesthesiology and Intensive Therapy Medical University of Lublin, Lublin, Poland
| | | | - Przemyslaw Zadora
- Department of Anesthesiology and Intensive Therapy Medical University of Lublin, Lublin, Poland
| | - Jacek Pilat
- Department of General Surgery, Transplantology and Clinical Nutrition Medical University of Lublin, Lublin, Poland
| | - Ziemowit Rzecki
- Department of Anesthesiology and Intensive Therapy Medical University of Lublin, Lublin, Poland
| | - Wojciech Zaluska
- Department of Nephrology Medical University of Lublin, Lublin, Poland
| | - Daniel Schneditz
- Department of Physiology, Medical University of Graz, Graz, Austria
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Hecking M, Rayner H, Wabel P. What are the Consequences of Volume Expansion in Chronic Dialysis Patients? Semin Dial 2015; 28:242-7. [DOI: 10.1111/sdi.12355] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Hugh Rayner
- Heart of England; NHS Foundation Trust; Birmingham United Kingdom
| | - Peter Wabel
- Fresenius Medical Care, Research and Development; Bad Homburg Germany
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Weitzel WF, Hamilton J, Wang X, Bull JL, Vollmer A, Bowman A, Rubin J, Kruger GH, Gao J, Heung M, Rao P. Quantitative Lung Ultrasound Comet Measurement: Method and Initial Clinical Results. Blood Purif 2015; 39:37-44. [DOI: 10.1159/000368973] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
<b><i>Background/Aims:</i></b> Recently, ultrasound signals termed ‘lung water comets' associated with pulmonary edema have been correlated with adverse clinical events in dialysis patients. These comets fluctuate substantially during the ultrasound exam highlighting the need for objective quantitative measurement methods. <b><i>Methods:</i></b> We developed an image-processing algorithm for the detection and quantification of lung comets. Quantification measures included comet number (comet count) and the fraction of the ultrasound beams with comet findings (comet fraction). We used this algorithm in a pilot study in 20 stable dialysis outpatients to identify associations between ultrasound comets and clinical parameters including blood pressure (BP), percent blood volume reduction on dialysis (%BV), ejection fraction (EF), and ultrafiltration on dialysis (UF). <b><i>Results:</i></b> Positive findings included associations with lung comet measurements with pre-dialysis Diastolic BP (r = 0.534, p = 0.015), subject age (r = -0.446, p = 0.049), and a combination of EF and end dialysis %BV reduction (r = -0.585, p = 0.028). Comet fraction and comet count were closely correlated due to the inherent relationship between these two metrics (r = 0.973, p < 0.001). Negative findings included ultrasound comets that did not change from beginning to end of dialysis (p = 0.756), and were not significantly correlated with single dialysis treatment UF (p = 0.522), subject body weight (p = 0.208), or BMI (p = 0.358). <b><i>Conclusions:</i></b> Ultrasound signal processing methods may help quantify lung ultrasound comets. Additional findings include algorithmic lung comet measurement that did not change significantly during single dialysis sessions in these stable outpatients, but were associated with cardiovascular and fluid status parameters.
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Liu X, Kruger P, Maibach H, Colditz PB, Roberts MS. Using skin for drug delivery and diagnosis in the critically ill. Adv Drug Deliv Rev 2014; 77:40-9. [PMID: 25305335 DOI: 10.1016/j.addr.2014.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 09/09/2014] [Accepted: 10/01/2014] [Indexed: 02/08/2023]
Abstract
Skin offers easy access, convenience and non-invasiveness for drug delivery and diagnosis. In principle, these advantages of skin appear to be attractive for critically ill patients given potential difficulties that may be associated with oral and parenteral access in these patients. However, the profound changes in skin physiology that can be seen in these patients provide a challenge to reliably deliver drugs or provide diagnostic information. Drug delivery through skin may be used to manage burn injury, wounds, infection, trauma and the multisystem complications that rise from these conditions. Local anaesthetics and analgesics can be delivered through skin and may have wide application in critically ill patients. To ensure accurate information, diagnostic tools require validation in the critically ill patient population as information from other patient populations may not be applicable.
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Durajska K, Januszkiewicz E, Szmygel Ł, Kosiak W. Inferior vena cava/aorta diameter index in the assessment of the body fluid status - a comparative study of measurements performed by experienced and inexperienced examiners in a group of young adults. J Ultrason 2014; 14:273-9. [PMID: 26675322 PMCID: PMC4579687 DOI: 10.15557/jou.2014.0027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 11/08/2013] [Accepted: 11/13/2013] [Indexed: 12/21/2022] Open
Abstract
The assessment of the body fluid status is one the most challenging tasks in clinical practice. Although there are many methods to assess the body fluid status of patients, none of them is fully satisfactory in contemporary medical sciences. In the article below, we compare the results of measurements performed by experienced and inexperienced examiners based on the inferior vena cava/aorta diameter index in a sonographic hydration assessment. The study enrolled 50 young students at the age of 19-26 (the median age was 22.95) including 27 women and 23 men. The volunteers were examined in the supine position with GE Logiq 7 system and a convex transducer with the frequency of 2-5 MHz. The measurements were performed in the longitudinal and transverse planes by two inexperienced examiners - the authors of this paper, following a four-hour training conducted by an experienced sonographer. The longitudinal values of the inferior vena cava/aorta diameter index obtained in this study were similar to those found in the literature. The reference value for the inferior vena cava/aorta index determined by Kosiak et al., which constituted 1.2 ± 2 SD, for SD = 0.17, was similar to the values obtained by the authors of this paper which equaled 1.2286 ± 2 SD, for SD = 0.2. The article presented below proves that measuring the inferior vena cava/aorta diameter index is not a complex examination and it may be performed by physicians with no sonographic experience. Furthermore, the paper demonstrates that the inferior vena cava/aorta diameter index measured in the transverse plane is similar to the inferior vena cava/aorta diameter index determined in the longitudinal plane. Thus, both measurements may be used interchangeably to assess the hydration status of patients.
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Affiliation(s)
- Kaja Durajska
- Ultrasound Student Association at the Laboratory of Diagnostic Ultrasound and Biopsy, Department of Pediatrics, Oncology, Hematology and Endocrinology, University Clinical Center in Gdańsk, Gdańsk, Poland
| | - Emilia Januszkiewicz
- Ultrasound Student Association at the Laboratory of Diagnostic Ultrasound and Biopsy, Department of Pediatrics, Oncology, Hematology and Endocrinology, University Clinical Center in Gdańsk, Gdańsk, Poland
| | - Łukasz Szmygel
- Department of Pediatrics, Diabetology and Endocrinology, University Clinical Center in Gdańsk, Gdańsk, Poland
| | - Wojciech Kosiak
- Laboratory of Diagnostic Ultrasound and Biopsy, Department of Pediatrics, Oncology, Hematology and Endocrinology, University Clinical Center in Gdańsk, Gdańsk, Poland
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Muniz Pazeli J, Fagundes Vidigal D, Cestari Grossi T, Silva Fernandes NM, Colugnati F, Baumgratz de Paula R, Sanders-Pinheiro H. Can Nephrologists Use Ultrasound to Evaluate the Inferior Vena Cava? A Cross-Sectional Study of the Agreement between a Nephrologist and a Cardiologist. NEPHRON EXTRA 2014; 4:82-8. [PMID: 24926312 PMCID: PMC4036136 DOI: 10.1159/000362170] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background/Aims The costs and the need for a specialist impair the implementation of ultrasonography for evaluating the inferior vena cava (IVC) to assess the volemic status in hemodialysis patients. We investigated whether a nephrologist with limited ultrasound training can accurately assess the IVC in patients undergoing hemodialysis. Methods A cardiologist and a nephrologist consecutively measured the indexed IVC expiratory diameter (VCDi) and the IVC collapsibility index (IVCCI) of 52 patients during hemodialysis sessions. In protocol I, the nephrologist used a regular ultrasound system (RUS) and the cardiologist used a cardiovascular ultrasound equipment; in protocol II, the machines were interchanged. Pearson and kappa coefficients and the interexaminer agreement by the Bland-Altman method were calculated. Results The VCDi measurements showed a strong correlation in both protocols (r = 0.88 and 0.84 in protocols I and II, respectively). The volemic classifications were excellent in protocol I (kappa = 0.82 and 0.93 by VCDi and IVCCI, respectively) and substantial in protocol II (kappa = 0.77 and 0.75 by VCDi and IVCCI, respectively). The interexaminer agreement on the VCDi measurements was very good in both protocols. Conclusions Ultrasound evaluation of the IVC can be performed by nephrologists using an RUS to assess the volemic status in hemodialysis patients.
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Affiliation(s)
- José Muniz Pazeli
- Division of Nephrology, Federal University of Juiz de Fora, Barbacena, Brazil ; Núcleo Interdisciplinar de Estudos e Pesquisas em Nefrologia (NIEPEN), Juiz de Fora, Barbacena, Brazil ; Clinical Department, Faculty of Medicine of Barbacena (FAME), Barbacena, Brazil ; Pró-Renal Center of Renal Diseases and Dialysis Unit, Barbacena, Brazil ; World Interactive Network Focused on Critical Ultrasound (WINFOCUS), Milan, Italy
| | | | | | - Natália Maria Silva Fernandes
- Division of Nephrology, Federal University of Juiz de Fora, Barbacena, Brazil ; Núcleo Interdisciplinar de Estudos e Pesquisas em Nefrologia (NIEPEN), Juiz de Fora, Barbacena, Brazil
| | - Fernando Colugnati
- Division of Nephrology, Federal University of Juiz de Fora, Barbacena, Brazil ; Núcleo Interdisciplinar de Estudos e Pesquisas em Nefrologia (NIEPEN), Juiz de Fora, Barbacena, Brazil
| | - Rogério Baumgratz de Paula
- Division of Nephrology, Federal University of Juiz de Fora, Barbacena, Brazil ; Núcleo Interdisciplinar de Estudos e Pesquisas em Nefrologia (NIEPEN), Juiz de Fora, Barbacena, Brazil
| | - Hélady Sanders-Pinheiro
- Division of Nephrology, Federal University of Juiz de Fora, Barbacena, Brazil ; Núcleo Interdisciplinar de Estudos e Pesquisas em Nefrologia (NIEPEN), Juiz de Fora, Barbacena, Brazil
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Abbas SR, Zhu F, Kaysen GA, Kotanko P, Levin NW. Effect of change in fluid distribution in segments in hemodialysis patients at different ultrafiltration rates on accuracy of whole body bioimpedance measurement. J Appl Physiol (1985) 2014; 116:1382-9. [PMID: 24674858 DOI: 10.1152/japplphysiol.01361.2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
This study explored divergence (error) between ultrafiltration volumes (UFV) and intradialytic changes in extracellular volume (ΔECV) in hemodialysis (HD) patients measured by whole body (wBIS) and sum of segmental bioimpedance spectroscopy (sBIS). The primary aim of the study was to evaluate the effect of different ultrafiltration rates (UFR) on error of estimation of ΔECV by changes in their distribution in body segments (arm, trunk, and leg). Forty-four HD patients (26 men, age 63.5 ± 14.3 yr) were studied twice in the same week following high and low UFR treatments. ΔECV and distributions (segmental ΔECV/Σsegmental ΔECV, %) in arm, trunk, and leg were measured. ΔECV by wBIS underestimated UFV (0.58 ± 0.43 in high vs. 0.36 ± 0.5 liters at low UFR; P < 0.001, respectively); however, using sBIS no significant difference between UFV and ΔECV was present. Divergence using wBIS but not sBIS correlated positively with UFR. ΔECV distribution in trunk and leg at high UFR (44.1 ± 8.3, 47.2 ± 8.5, %) differed significantly (P < 0.01) from low UFR (36 ± 15.7, 53.8 ± 14.7) respectively, but in arm did not differ between UFR. Primary sources of whole body resistance are arms and legs. Due to different cross-sectional areas between trunk and limbs, wBIS is insensitive to detection of changes in trunk volume. At higher UFR, plasma water was rapidly and largely removed from the trunk but with only a small change in whole body resistance. As a result, accuracy of estimation of ECV by wBIS is further decreased by high UFR, while sBIS remains accurate using separate measurements of segmental volumes.
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Affiliation(s)
| | - Fansan Zhu
- Renal Research Institute, New York, New York; and
| | - George A Kaysen
- Renal Research Institute, New York, New York; and Department of Medicine Division of Nephrology, Department of Biochemistry and Molecular Medicine, University of California, Davis, California
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Abbas SR, Liu L, Sipahioglu MH, Rosales L, Carter M, Kotanko P, Levin NW, Zhu F. Comparison of Bioimpedance Techniques to Detect Changes in Fluid Status in Hemodialysis Patients. Blood Purif 2014; 37:48-56. [DOI: 10.1159/000356830] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 10/28/2013] [Indexed: 11/19/2022]
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Hecking M, Karaboyas A, Antlanger M, Saran R, Wizemann V, Chazot C, Rayner H, Hörl WH, Pisoni RL, Robinson BM, Sunder-Plassmann G, Moissl U, Kotanko P, Levin NW, Säemann MD, Kalantar-Zadeh K, Port FK, Wabel P. Significance of interdialytic weight gain versus chronic volume overload: consensus opinion. Am J Nephrol 2013; 38:78-90. [PMID: 23838386 DOI: 10.1159/000353104] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 04/04/2013] [Indexed: 12/13/2022]
Abstract
Predialysis volume overload is the sum of interdialytic weight gain (IDWG) and residual postdialysis volume overload. It results mostly from failure to achieve an adequate volume status at the end of the dialysis session. Recent developments in bioimpedance spectroscopy and possibly relative plasma volume monitoring permit noninvasive volume status assessment in hemodialysis patients. A large proportion of patients have previously been shown to be chronically volume overloaded predialysis (defined as >15% above 'normal' extracellular fluid volume, equivalent to >2.5 liters on average), and to exhibit a more than twofold increased mortality risk. By contrast, the magnitude of the mortality risk associated with IDWG is much smaller and only evident with very large weight gains. Here we review the available evidence on volume overload and IDWG, and question the use of IDWG as an indicator of 'nonadherence' by describing its association with postdialysis volume depletion. We also demonstrate the relationship between IDWG, volume overload and predialysis serum sodium concentration, and comment on salt intake. Discriminating between volume overload and IDWG will likely lead to a more appropriate management of fluid withdrawal during dialysis. Consensually, the present authors agree that this discrimination should be among the primary goals for dialysis caretakers today. In consequence, we recommend objective measures of volume status beyond mere evaluations of IDWG.
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Affiliation(s)
- Manfred Hecking
- Department of Nephrology, Medical University of Vienna, Vienna, Austria
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Basso F, Milan Manani S, Cruz DN, Teixeira C, Brendolan A, Nalesso F, Zanella M, Ronco C. Comparison and Reproducibility of Techniques for Fluid Status Assessment in Chronic Hemodialysis Patients. Cardiorenal Med 2013; 3:104-112. [PMID: 23922550 DOI: 10.1159/000351008] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 03/25/2013] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Several methods have been developed to assess the hydration status in chronic hemodialysis (HD) patients. The aim of this study was to compare body bioimpedance spectroscopy (BIS) with ultrasound (US) lung comet score (ULCs), B-type natriuretic peptide (BNP) and inferior vena cava diameter (IVCD) by US for the estimation of dry weight before and after HD and to analyze all methods in terms of fluid status variations induced by HD. An additional aim of this study was to establish the interoperator reproducibility of these methods. METHODS Two nephrologists evaluated BIS, ULCs, IVCD during inspiration (min) and expiration (max), the inferior vena cava collapsibility index (IVCCI) as well as BNP before and after HD in 30 patients. The same operators measured BIS, ULCs and IVCD in 28 HD patients in a blinded fashion. RESULTS There was a significant reduction in BIS, ULCs, IVCD and BNP after HD (p < 0.001), but a less significant reduction in IVCCI (p = 0.13). There was a significant correlation between BIS and ULCs, BNP and indexed IVCD (IVCDi)min (p < 0.05) before and after HD, and between BIS and IVCDimax only before HD. CONCLUSION All methods were able to describe hyperhydration before and after HD, except for IVCCI after HD. All techniques correlated with BIS before HD. After HD, ULCs correlated better with BIS than IVCD in terms of evaluation of fluid status. It could be expected that the ULCs can give a real-time evaluation of interstitial water. The reproducibility of the measurement of BIS, IVCD and ULCs between the two operators was high.
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Affiliation(s)
- Flavio Basso
- Department of Nephrology, Dialysis and Transplantation, St. Bortolo Hospital, Vicenza, Italy ; IRRIV-International Renal Research Institute Vicenza, Vicenza, Italy
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Covic A, Voroneanu L. Dialysis fata morgana: can we finally successfully tackle intradialytic hypotension with plasma sodium biofeedback systems? Nephrol Dial Transplant 2013; 28:250-3. [DOI: 10.1093/ndt/gfs434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chapter 4: Other complications of CKD: CVD, medication dosage, patient safety, infections, hospitalizations, and caveats for investigating complications of CKD. Kidney Int Suppl (2011) 2013; 3:91-111. [PMID: 25599000 PMCID: PMC4284425 DOI: 10.1038/kisup.2012.67] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Cigarrán S, Pousa M, Castro MJ, González B, Martínez A, Barril G, Aguilera A, Coronel F, Stenvinkel P, Carrero JJ. Endogenous testosterone, muscle strength, and fat-free mass in men with chronic kidney disease. J Ren Nutr 2012; 23:e89-95. [PMID: 23046736 DOI: 10.1053/j.jrn.2012.08.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 08/18/2012] [Accepted: 08/18/2012] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE Testosterone deficiency is a common finding in men with chronic kidney disease (CKD). Testosterone is thought to play an important anabolic role in muscle synthesis, and muscle wasting is an important and deleterious characteristic of protein-energy wasting (PEW) in CKD. It is presently unknown if reduced endogenous testosterone associates with features of muscle wasting in men with CKD. METHODS This was a cross-sectional observational study of 267 men with CKD stages 2-4 (mean ± standard deviation age 67 ± 13 years, estimated glomerular filtration rate 42.9 [interquartile range 30.2-56.7] mL/min/1.73 m²) with measurements of endogenous testosterone and surrogates of PEW such as albumin, prealbumin, high-sensitivity C-reactive protein (CRP) and normalized protein nitrogen appearance (nPNA). Fat-free mass was estimated by bioelectrical impedance vector analysis (BIVA) and muscle strength by handgrip dynamometry. RESULTS Across decreasing thirds of testosterone distribution, patients were incrementally older and CRP levels rose significantly. Prealbumin, hemoglobin, nPNA, handgrip strength, and BIVA estimated surrogates of muscle mass and nutritional status (fat-free mass, body cell mass, and phase angle) were progressively reduced (P < .05 for all). In multivariate regression analyses including age, renal function, and other important confounders, testosterone significantly and independently contributed to explain the variances of handgrip strength and fat-free mass (P < .05 for all). CONCLUSIONS Endogenous testosterone independently associates with muscle strength and fat-free mass in men with moderate CKD. It is plausible that the reduction in testosterone levels that accompanies CKD may further contribute to the procatabolic environment leading to muscle wasting.
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LIU LI, ZHU FANSAN, G RAIMANN JOCHEN, THIJSSEN STEPHAN, SIPAHIOGLU MURATH, WYSTRYCHOWSKI GREGORY, KITZLER THOMAS, TETTA CIRO, WABEL PETER, KOTANKO PETER, LEVIN NATHANW. Determination of fluid status in haemodialysis patients with whole body and calf bioimpedance techniques. Nephrology (Carlton) 2012; 17:131-40. [DOI: 10.1111/j.1440-1797.2011.01526.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Maheshwari V, Samavedham L, Rangaiah GP. A Regional Blood Flow Model for β2-Microglobulin Kinetics and for Simulating Intra-dialytic Exercise Effect. Ann Biomed Eng 2011; 39:2879-90. [DOI: 10.1007/s10439-011-0383-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 08/17/2011] [Indexed: 11/24/2022]
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Bhave G, Neilson EG. Volume depletion versus dehydration: how understanding the difference can guide therapy. Am J Kidney Dis 2011; 58:302-9. [PMID: 21705120 DOI: 10.1053/j.ajkd.2011.02.395] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 02/28/2011] [Indexed: 12/27/2022]
Abstract
Although often used interchangeably, dehydration and volume depletion are not synonyms. Dehydration refers to loss of total-body water, producing hypertonicity, which now is the preferred term in lieu of dehydration, whereas volume depletion refers to a deficit in extracellular fluid volume. In particular, hypertonicity implies intracellular volume contraction, whereas volume depletion implies blood volume contraction. Using a case of hyperglycemic hypertonic nonketosis as an example, we examine the changing composition of body fluid spaces to explore the distinction between dehydration and hypertonicity from volume depletion.
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Affiliation(s)
- Gautam Bhave
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Zhu F, Kotanko P, Handelman GJ, Raimann JG, Liu L, Carter M, Kuhlmann MK, Seibert E, Leonard EF, Levin NW. Estimation of normal hydration in dialysis patients using whole body and calf bioimpedance analysis. Physiol Meas 2011; 32:887-902. [PMID: 21646705 DOI: 10.1088/0967-3334/32/7/s12] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Prescription of an appropriate dialysis target weight (dry weight) requires accurate evaluation of the degree of hydration. The aim of this study was to investigate whether a state of normal hydration (DW(cBIS)) as defined by calf bioimpedance spectroscopy (cBIS) and conventional whole body bioimpedance spectroscopy (wBIS) could be characterized in hemodialysis (HD) patients and normal subjects (NS). wBIS and cBIS were performed in 62 NS (33 m/29 f) and 30 HD patients (16 m/14 f) pre- and post-dialysis treatments to measure extracellular resistance and fluid volume (ECV) by the whole body and calf bioimpedance methods. Normalized calf resistivity (ρ(N)(,5)) was defined as resistivity at 5 kHz divided by the body mass index. The ratio of wECV to total body water (wECV/TBW) was calculated. Measurements were made at baseline (BL) and at DW(cBIS) following the progressive reduction of post-HD weight over successive dialysis treatments until the curve of calf extracellular resistance is flattened (stabilization) and the ρ(N)(,5) was in the range of NS. Blood pressures were measured pre- and post-HD treatment. ρ(N)(,5) in males and females differed significantly in NS. In patients, ρ(N)(,5) notably increased with progressive decrease in body weight, and systolic blood pressure significantly decreased pre- and post-HD between BL and DW(cBIS) respectively. Although wECV/TBW decreased between BL and DW(cBIS), the percentage of change in wECV/TBW was significantly less than that in ρ(N)(,5) (-5.21 ± 3.2% versus 28 ± 27%, p < 0.001). This establishes the use of ρ(N)(,5) as a new comparator allowing a clinician to incrementally monitor removal of extracellular fluid from patients over the course of dialysis treatments. The conventional whole body technique using wECV/TBW was less sensitive than the use of ρ(N)(,5) to measure differences in body hydration between BL and DW(cBIS).
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Affiliation(s)
- Fansan Zhu
- Renal Research Institute, Yorkville Dialysis Center, 1555 3rd Avenue 218, New York, NY 10128, USA.
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Ion Titapiccolo J, Ferrario M, Garzotto F, Cruz D, Moissl U, Tetta C, Ronco C, Signorini MG, Cerutti S. Relative blood volume monitoring during hemodialysis in end stage renal disease patients. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2010:5282-5. [PMID: 21096059 DOI: 10.1109/iembs.2010.5626307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A crucial point in the haemodialysis (HD) treatment is the reliable assessment of hydration status. An inadequate removed volume may lead to chronic fluid overload which can lead to hypertension, left ventricular hypertrophy and heart failure. Therefore, the estimation of the hydration state and the management of a well-tolerated water removal is an important challenge. This exploratory study aims at identifying new parameters obtained from continuous Blood Volume Monitoring (BVM) allowing a qualitative evaluation of hydration status for verifying the adequacy of HD setting parameters (e.g UFR, target dry weight). The percentage of blood volume reduction (BVR%) during HD was compared against a gold standard method for hydration status assessment. The slope of the first 30 minute of blood volume reduction (BVR) was proposed as a useful parameter to identify overhydrated patients.
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Affiliation(s)
- Jasmine Ion Titapiccolo
- Politecnico di Milano, Department of Bioengineering, P.zza Leonardo da Vinci 32, 20133, Italy.
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Urea kinetics and intermittent dialysis prescription in small animals. Vet Clin North Am Small Anim Pract 2011; 41:193-225. [PMID: 21251518 DOI: 10.1016/j.cvsm.2010.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Hemodialysis improves survival for animals with acute kidney injury beyond what would be expected with conventional management of the same animals. Clinical evidence and experience in human patients suggest a role for earlier intervention with renal replacement to avoid the morbidity of uremia and to promote better metabolic stability and recovery. For a large population of animal patients, it is the advanced standard for the management of acute and chronic uremia, life-threatening poisoning, and fluid overload for which there is no alternative therapy.
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Garg R, Singh A, Khaja A, Martin A, Aggarwal K. How does volume status affect BNP and troponin levels as markers of cardiovascular status in peritoneal dialysis? ACTA ACUST UNITED AC 2010; 15:240-4. [PMID: 19751426 DOI: 10.1111/j.1751-7133.2009.00094.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cardiac biomarkers such as brain natriuretic peptide, amino-terminal pro-B-type natriuretic peptide (NT-proBNP), and cardiac troponin provide information on cardiovascular morbidity and mortality in patients with normal renal function. In a considerable number of chronic hemodialysis patients, both biomarkers-NT-proBNP and troponin-are elevated despite the absence of cardiac ischemia. The elevation of cardiac biomarkers in chronic hemodialysis patients is of prognostic value with respect to cardiovascular morbidity and mortality. Furthermore, they can serve as tools for volume assessment for optimization of the fluid management aspect of dialysis. However, the association of both these markers in peritoneal dialysis is not clear. Therefore, the authors reviewed the literature to examine the role of these markers in peritoneal dialysis patients both as prognostic indicators as well as tools for volume assessment.
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Affiliation(s)
- Rajeev Garg
- University of Missouri-Columbia, 65202, USA.
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Arneson TJ, Liu J, Qiu Y, Gilbertson DT, Foley RN, Collins AJ. Hospital treatment for fluid overload in the Medicare hemodialysis population. Clin J Am Soc Nephrol 2010; 5:1054-63. [PMID: 20430944 DOI: 10.2215/cjn.00340110] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVES Fluid overload in hemodialysis patients sometimes requires emergent dialysis, but the magnitude of this care has not been characterized. This study aimed to estimate the magnitude of fluid overload treatment episodes for the Medicare hemodialysis population in hospital settings, including emergency departments. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Point-prevalent hemodialysis patients were identified from the Centers for Medicare and Medicaid Renal Management Information System and Standard Analytical Files. Fluid overload treatment episodes were defined by claims for care in inpatient, hospital observation, or emergency department settings with primary discharge diagnoses of fluid overload, heart failure, or pulmonary edema, and dialysis performed on the day of or after admission. Exclusion criteria included stays >5 days. Cost was defined as total Medicare allowable costs for identified episodes. Associations between patient characteristics and episode occurrence and cost were analyzed. RESULTS For 25,291 patients (14.3%), 41,699 care episodes occurred over a mean follow-up time of 2 years: 86% inpatient, 9% emergency department, and 5% hospital observation. Heart failure was the primary diagnosis in 83% of episodes, fluid overload in 11%, and pulmonary edema in 6%. Characteristics associated with more frequent events included age <45 years, female sex, African-American race, causes of ESRD other than diabetes, dialysis duration of 1 to 3 years, fewer dialysis sessions per week at baseline, hospitalizations during baseline, and most comorbid conditions. Average cost was $6,372 per episode; total costs were approximately $266 million. CONCLUSIONS Among U.S. hemodialysis patients, fluid overload treatment is common and expensive. Further study is necessary to identify prevention opportunities.
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Affiliation(s)
- Thomas J Arneson
- Chronic Disease Research Group, Minneapolis Medical Research Foundation, Minneapolis, MN 55404, USA.
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Guiotto G, Masarone M, Paladino F, Ruggiero E, Scott S, Verde S, Schiraldi F. Inferior vena cava collapsibility to guide fluid removal in slow continuous ultrafiltration: a pilot study. Intensive Care Med 2010; 36:692-6. [DOI: 10.1007/s00134-009-1745-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Accepted: 12/24/2009] [Indexed: 11/24/2022]
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