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Longino AA, Martin KC, Douglas IS. Monitoring the venous circulation: novel techniques and applications. Curr Opin Crit Care 2024; 30:260-267. [PMID: 38690955 DOI: 10.1097/mcc.0000000000001155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
PURPOSE OF REVIEW Venous pressure is an often-unrecognized cause of patient morbidity. However, bedside assessment of PV is challenging. We review the clinical significance of venous pressure measurement, existing techniques, and introduce the Venous Excess Ultrasound (VExUS) Score as a novel approach using doppler ultrasound to assess venous pressure. RECENT FINDINGS Studies show clear associations between elevated venous pressure and adverse outcomes in critically ill patients. Current venous pressure measurement techniques include physical examination, right heart catheterization (RHC), two-dimensional ultrasound, and a variety of labor-intensive research-focused physiological maneuvers. Each of these techniques have specific shortcomings, limiting their clinical utility. To address these gaps, Beaubien-Souligny et al. introduced the VExUS Score, a novel doppler ultrasound-based method that integrates IVC diameter with doppler measurements of the hepatic, portal, and renal veins to generate a venous congestion assesment. Studies show strong correlations between VExUS score and RHC measurements, and well as an association between VExUS score and improvement in cardiorenal acute kidney injury, diuretic response, and fluid status shifts. However, studies in noncardiac populations have been small, heterogenous, and inconclusive. SUMMARY Early studies evaluating the use of doppler ultrasound to assess venous congestion show promise, but further research is needed in diverse patient populations and clinical settings.
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Affiliation(s)
- August A Longino
- Department of Internal Medicine, University of Colorado Hospital
| | | | - Ivor S Douglas
- Department of Pulmonary and Critical Care Medicine, Denver Health Medical Center, Denver, CO, USA
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Robayo-Amortegui H, Quintero-Altare A, Florez-Navas C, Serna-Palacios I, Súarez-Saavedra A, Buitrago-Bernal R, Casallas-Barrera JO. Fluid dynamics of life: exploring the physiology and importance of water in the critical illness. Front Med (Lausanne) 2024; 11:1368502. [PMID: 38745736 PMCID: PMC11092983 DOI: 10.3389/fmed.2024.1368502] [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] [Received: 01/12/2024] [Accepted: 04/12/2024] [Indexed: 05/16/2024] Open
Abstract
Water acknowledged as a vital component for life and the universal solvent, is crucial for diverse physiological processes in the human body. While essential for survival, the human body lacks the capacity to produce water, emphasizing the need for regular ingestion to maintain a homeostatic environment. The human body, predominantly composed of water, exhibits remarkable biochemical properties, playing a pivotal role in processes such as protein transport, thermoregulation, the cell cycle, and acid–base balance. This review delves into comprehending the molecular characteristics of water and its interactions within the human body. The article offers valuable insights into the intricate relationship between water and critical illness. Through a comprehensive exploration, it seeks to enhance our understanding of water’s pivotal role in sustaining overall human health.
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Affiliation(s)
- Henry Robayo-Amortegui
- Department of Critical Care Medicine, Fundación Clínica Shaio, Bogotá, DC, Colombia
- Department of Medicine, Critical Care Resident, Universidad de La Sabana, Chía Cundinamarca, Colombia
| | - Alejandro Quintero-Altare
- Department of Critical Care Medicine, Fundación Clínica Shaio, Bogotá, DC, Colombia
- Department of Medicine, Critical Care Resident, Universidad de La Sabana, Chía Cundinamarca, Colombia
| | - Catalina Florez-Navas
- Department of Critical Care Medicine, Fundación Clínica Shaio, Bogotá, DC, Colombia
- Department of Medicine, Critical Care Resident, Universidad de La Sabana, Chía Cundinamarca, Colombia
| | - Isacio Serna-Palacios
- Department of Medicine, Critical Care Resident, Universidad de La Sabana, Chía Cundinamarca, Colombia
| | | | - Ricardo Buitrago-Bernal
- Department of Critical Care Medicine, Fundación Clínica Shaio, Bogotá, DC, Colombia
- Exploratorium group, Fundación Clínica Shaio, Bogotá, DC, Colombia
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Leyba K, Longino A, Ormesher R, Krienke M, Van Ochten N, Zimmerman K, McCormack L, Martin K, Thai T, Furgeson S, Teitelbaum I, Burke J, Douglas I, Gill E. Venous excess ultrasonography (VExUS) captures dynamic changes in volume status surrounding hemodialysis: A multicenter prospective observational study. RESEARCH SQUARE 2024:rs.3.rs-4185584. [PMID: 38659788 PMCID: PMC11042415 DOI: 10.21203/rs.3.rs-4185584/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Background The evaluation of volume status is essential to clinical decision-making, yet multiple studies have shown that physical exam does not reliably estimate a patient's intravascular volume. Venous excess ultrasound score (VExUS) is an emerging volume assessment tool that utilizes inferior vena cava (IVC) diameter and pulse-wave Doppler waveforms of the portal, hepatic and renal veins to evaluate venous congestion. A point-of-care ultrasound exam initially developed by Beaubein-Souligny et al., VExUS represents a reproducible, non-invasive and accurate means of assessing intravascular congestion. VExUS has recently been validated against RHC-the gold-standard of hemodynamic evaluation for volume assessment. While VExUS scores were shown to correlate with elevated cardiac filling pressures (i.e., right atrial pressure (RAP) and pulmonary capillary wedge pressure (PCWP)) at a static point in time, the ability of VExUS to capture dynamic changes in volume status has yet to be elucidated. We hypothesized that paired VExUS examinations performed before and after hemodialysis (HD) would reflect changes in venous congestion in a diverse patient population. Methods Inpatients with end-stage renal disease undergoing intermittent HD were evaluated with transabdominal VExUS and lung ultrasonography before and following HD. Paired t-tests were conducted to assess differences between pre-HD and post-HD VExUS scores, B-line scores and dyspnea scores. Results Fifty-six patients were screened for inclusion in this study. Ten were excluded due to insufficient image quality or incomplete exams, and forty-six patients (ninety-two paired ultrasound exams) were included in the final analysis. Paired t-test analysis of pre-HD and post-HD VExUS scores revealed a mean VExUS grade change of 0.82 (p<0.001) on a VExUS scale ranging from 0 to 4. The mean difference in B-line score following HD was 0.8 (p=0.001). There was no statistically significant difference in subjective dyspnea score (p=0.41). Conclusions Large-volume fluid removal with HD was represented by changes in VExUS score, highlighting the utility of the VExUS exam to capture dynamic shifts in intravascular volume status. Future studies should evaluate change in VExUS grade with intravenous fluid or diuretic administration, with the ultimate goal of evaluating the capacity of a standardized bedside ultrasound protocol to guide inpatient volume optimization.
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Sabogal RC. Exploring the Applicability of Pre-Anesthetic Cardiac POCUS in Unexpected Conditions: Could it be Helpful? POCUS JOURNAL 2023; 8:237-242. [PMID: 38099178 PMCID: PMC10721308 DOI: 10.24908/pocus.v8i2.16519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Formal preoperative echocardiography has traditionally been recommended when there is substantial cardiovascular disease without recent follow up, unexplained dyspnea, a functional class less than 4 METS or a Duke Activity Status Index less than 34. However, it is important to note that certain patients may present with a variety of cardiac abnormalities due to their preexisting condition or multiple treatments, and these individuals warrant consideration. The objective of pre-anesthetic cardiac POCUS is to provide clinical information in a timely manner. Although it does not aim to replace conventional echocardiography, cardiac POCUS can undoubtedly assist anesthesia practitioners in identifying asymptomatic and potentially hazardous conditions, allowing for more accurate risk allocation and individualized patient care.
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Affiliation(s)
- Rodolfo C Sabogal
- Department of Anesthesiology and Critical Care, Universidad de Cartagena, Universidad de AntioquiaCartagenaColombia
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Perry A, Anand Mohan P, Bodker K, Elshennawy M, Taber DJ, Herberth J, Soliman K. Collaborative peri-transplant management of volume status, hypertension, and immunosuppression: enhancing kidney transplants for better outcomes. Ren Fail 2023; 45:2271559. [PMID: 37885261 PMCID: PMC11001351 DOI: 10.1080/0886022x.2023.2271559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/11/2023] [Indexed: 10/28/2023] Open
Affiliation(s)
- Amy Perry
- Medical Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Prince Anand Mohan
- Department of Medicine, Division of Transplant Surgery, Medical University of South Carolina, Lancaster, SC, USA
| | - Kevin Bodker
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, USA
| | | | - David J. Taber
- Medical Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, USA
| | - Johann Herberth
- Medical Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Karim Soliman
- Medical Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, USA
- Department of Surgery, Division of Transplant Surgery, Medical University of South Carolina, Charleston, SC, USA
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Al-Saray MZ, Ali A. Lung Ultrasound and Caval Indices to Assess Volume Status in Maintenance Hemodialysis Patients. POCUS JOURNAL 2023; 8:52-59. [PMID: 37152331 PMCID: PMC10155735 DOI: 10.24908/pocus.v8i1.15802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Background: Volume overload is common in end stage kidney disease (ESKD) and dialysis patients. Hence, the need for objective tools to detect such volume excess. Point of care ultrasound (POCUS) is a goal-directed, bedside examination to answer such a specific diagnostic question. Methods: One hundred Iraqi adult hemodialysis patients were recruited from February 1 to May 31, 2022. Primary clinical, dialysis data, and prescriptions were recorded. A nephrologist performed a POCUS examination after the last dialysis session of the week. In addition, an ultrasound examination of the chest was performed to detect B-lines and pleural effusion. Caval parameters included inferior vena cava (IVC) diameter and collapsibility index. Results: The mean age of the study group was 51.48 ± 14.6 years, with 53% males. The mean interdialytic weight gain was 2.74 ± 1.15 Kg. Lower limb edema and pleural effusion were present in 33% and 27%, respectively. Forty-seven percent of patients had >3 B-lines on lung ultrasound with a range of 12. Forty-three percent of patients had an IVC diameter of >2 cm, and 93% had <50% IVC collapsibility. In total, 97% of patients had evidence of excess volume by ultrasound criteria. IVC collapsibility index was the most prevalent sign of excess volume (93%). Patients without lower limb edema and pleural effusion had positive B-lines in 38.8% and 38.3%, an IVC diameter >2 cm in 46.2% and 38.3%, and IVC collapsibility <50% in 89.5% and 95.8% respectively. Conclusion: Iraqi maintenance hemodialysis patients are volume overloaded, which warrants proper intervention for detection and dialysis management. POCUS is a useful and easily performed technique to assess the volume status.
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Affiliation(s)
- Mujtaba Z Al-Saray
- Nephrology and Renal Transplantation Centre, The Medical CityBaghdadIraq
| | - Ala Ali
- Nephrology and Renal Transplantation Centre, The Medical CityBaghdadIraq
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Bahouth MN, Negoita S, Tenberg A, Zink EK, Abshire MA, Davidson PM, Suarez JI, Szanton SL, Gottesman RF. Noninvasive cardiac output monitor to quantify hydration status in ischemic stroke patients: A feasibility study. J Neurol Sci 2022; 442:120413. [PMID: 36215798 DOI: 10.1016/j.jns.2022.120413] [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: 04/08/2022] [Revised: 08/25/2022] [Accepted: 09/04/2022] [Indexed: 10/31/2022]
Abstract
BACKGROUND Individuals who are dehydrated, volume contracted or both at the time of hospitalization for acute ischemic stroke have worse clinical outcomes than do individuals with optimal volume status. Currently, there is no gold standard method for measuring hydration status, except indirect markers of a volume contracted state (VCS) including elevated blood urea nitrogen (BUN)/creatinine ratio. We sought to test the feasibility and acceptability of a non-invasive cardiac output monitor (NICOM) for the measurement of hydration status in a group of hospitalized ischemic stroke patients, and explore the relationship with a common indirect laboratory-based measure of VCS. METHODS We performed a prospective observational feasibility study of hospitalized acute ischemic stroke patients. We collected hemodynamic parameters using the NICOM device before and after fluid auto-bolus via passive leg raise and BUN/creatinine ratio. Successful acquisition of relevant hemodynamic data was the primary objective of this study. We explored agreement between the NICOM results and BUN/creatinine ratio using Cohen's kappa statistic. RESULTS Thirty patients hospitalized with acute ischemic stroke were enrolled. We found that 29/30 patients tolerated assessment with NICOM. Hemodynamic data were collected in all 30 patients. Data capture took an average of 10 min(SD ± 112 s). Agreement between NICOM and BUN/creatinine ratio was 70%; (expected agreement 51%; kappa 0.38). Agreement was stronger in the cohort without history of diabetes (81% agreement, kappa 0.61). CONCLUSIONS NICOM assessment was feasible in hospitalized stroke patients. The identification of an objective, real-time measure of hydration status would be clinically useful, and could allow precise, goal-directed care.
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Affiliation(s)
- M N Bahouth
- Department of Neurology, Johns Hopkins School of Medicine, United States of America.
| | - S Negoita
- Department of Neurology, Johns Hopkins School of Medicine, United States of America
| | - A Tenberg
- Johns Hopkins Hospital, United States of America
| | - E K Zink
- Johns Hopkins Hospital, United States of America
| | - M A Abshire
- Johns Hopkins School of Nursing, United States of America
| | - P M Davidson
- Johns Hopkins School of Nursing, United States of America
| | - J I Suarez
- Department of Neurology, Johns Hopkins School of Medicine, United States of America
| | - S L Szanton
- Johns Hopkins School of Nursing, United States of America
| | - R F Gottesman
- Department of Neurology, Johns Hopkins School of Medicine, United States of America; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, United States of America
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