Volume Removal Intolerance During Net Ultrafiltration in Acute Kidney Injury Patients (VINKO)
Acute kidney injury (AKI) is common in critically ill patients and is frequently associated with fluid overload, which can worsen clinical outcomes. Continuous renal replacement therapy (CRRT) allows fluid removal through net ultrafiltration (UFNET), but some patients develop hemodynamic instability or signs of poor tissue perfusion during this process.
The purpose of this prospective observational study is to evaluate tolerance to net ultrafiltration in critically ill patients with AKI receiving CRRT. The study will assess clinical, hemodynamic, ultrasound, perfusion, and biochemical parameters before and during fluid removal to identify factors associated with ultrafiltration intolerance.
The investigators hypothesize that alterations in hemodynamic, perfusion, and congestion-related parameters can identify patients at increased risk of ultrafiltration intolerance before the development of overt hypotension. The results may help improve individualized fluid removal strategies and optimize the safety of CRRT in critically ill patients.
Обзор исследования
Статус
Статус
Условия
Условия
Подробное описание
Fluid overload is a frequent and clinically relevant complication in critically ill patients with acute kidney injury (AKI). In this setting, continuous renal replacement therapy (CRRT) is frequently used not only for solute control but also as a strategy for controlled fluid removal through net ultrafiltration (UFNET). Although UFNET is central to de-resuscitation, the individual tolerance to fluid removal is highly variable and is not fully captured by blood pressure monitoring alone.
The concept of ultrafiltration intolerance remains poorly standardized. In clinical practice, intolerance is often recognized only after overt hemodynamic instability occurs, such as hypotension, escalation of vasoactive support, or interruption of fluid removal. However, reductions in cardiac output, impaired tissue perfusion, or worsening venous congestion may precede overt hypotension. Therefore, a multiparametric assessment may allow earlier identification of patients at risk.
This is a prospective, observational, analytical study in critically ill adult patients with AKI receiving CRRT with prescribed UFNET. The study does not assign or modify therapeutic interventions. CRRT modality, anticoagulation strategy, UFNET prescription, vasopressor management, fluid administration, and all other clinical decisions will remain under the responsibility of the treating clinical team according to routine care.
The study will characterize the physiological response to UFNET using a structured multiparametric monitoring approach. Recorded domains will include conventional macrohemodynamic variables, vasoactive support, selected advanced hemodynamic variables when available, focused cardiac ultrasound, venous congestion assessment, peripheral perfusion parameters, fluid balance variables, and selected biochemical markers. Functional hemodynamic maneuvers may be performed when feasible and clinically safe.
Data will be collected prospectively using a standardized case report form. Variables will be recorded at predefined time points before and during the early phase of UFNET, with additional off-schedule recordings if clinical signs compatible with intolerance occur. Source data will be obtained from the electronic or paper medical record, bedside monitoring systems, CRRT prescription and treatment records, laboratory results, and ultrasound assessments performed as part of clinical evaluation.
A data dictionary will define each variable, including its source, units, coding, and expected physiological range when applicable. Data quality procedures will include review of completeness, range checks, consistency checks between related variables, and verification of clinically implausible values against source records. The research team will periodically review entered data to identify missing, inconsistent, or out-of-range values.
Data will be anonymized before analysis. No directly identifiable patient information will be stored in the final analytical database. Access to the study database will be restricted to authorized study investigators. Data will be stored using password-protected institutional or investigator-controlled systems according to local confidentiality and ethical requirements.
The planned sample size is 128 participants, including an estimated analytical sample of 116 participants and an approximate 10% over-recruitment to account for incomplete data, missing assessments, or inability to definitively adjudicate the outcome. The sample size was based on an analytical case-control approach aimed at identifying factors associated with ultrafiltration intolerance.
Missing data will be evaluated before statistical analysis. Variables with substantial missingness may be excluded from inferential analyses. For variables with acceptable levels of missingness, available-case analysis will be performed. The extent and pattern of missing data will be reported.
Statistical analysis will include descriptive statistics, comparison between patients who develop ultrafiltration intolerance and those who do not, and exploratory modeling to identify factors independently associated with intolerance. Continuous variables will be summarized using median and interquartile range or mean and standard deviation, as appropriate. Categorical variables will be summarized as frequencies and percentages. Group comparisons will be performed using appropriate parametric or non-parametric tests according to data distribution. Multivariable logistic regression may be used to explore independent predictors, with covariate selection based on clinical relevance and number of events.
The overall objective of this study is to improve the characterization of ultrafiltration intolerance during CRRT and to generate evidence that may support individualized, physiology-guided fluid removal strategies in critically ill patients with AKI.
Тип исследования
Тип исследования
Регистрация (Оцененный)
Регистрация
Контакты и местонахождение
Контакты исследования
Контакты исследования
- Имя: Gonzalo Ramírez-Guerrero, MD
- Номер телефона: +56981746173
- Электронная почта: ramirezguerrero.g@gmail.com
Учебное резервное копирование контактов
- Имя: Cristian Pedreros-Rosales, MD
- Электронная почта: cpedreros@me.com
Места учебы
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Salvador, Бразилия
- Еще не набирают
- Hospital Cardio Pulmonar
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Контакт:
- Maria Gabriela Guimarães, MD
- Номер телефона: +5571982121211
- Электронная почта: Gabrielaguimar@hotmail.com
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Vicenza, Италия
- Еще не набирают
- Ospedale San Bortolo
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Контакт:
- Matteo Marcello, MD
- Номер телефона: +393925743247
- Электронная почта: matteo.marcello92@gmail.com
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Popayán, Колумбия
- Рекрутинг
- Hospital Universitario San José de Popayán
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Контакт:
- David Ballesteros, MD
- Номер телефона: +573105542506
- Электронная почта: david.ballesteros.c@gmail.com
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Mexico City, Мексика
- Рекрутинг
- Hospital General de Mexico
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Контакт:
- Pablo Galindo, MD
- Номер телефона: +525551564682
- Электронная почта: drgalindo@nefrologoscdmx.com
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Контакт:
- Sandra Ávila, MD
- Номер телефона: +524778808890
- Электронная почта: sandrapav@hotmail.es
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Lima, Перу
- Еще не набирают
- Hospital Nacional Cayetano Heredia
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Контакт:
- Raúl Valenzuela, MD
- Номер телефона: +51999308278
- Электронная почта: raul.valenzuela.cordova@gmail.com
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Concepción, Чили
- Еще не набирают
- Hospital Clínico Regional de Concepción
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Контакт:
- Marcos Hernandez, MD
- Номер телефона: +56976685604
- Электронная почта: md.hernandezdiaz@gmail.com
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Los Ángeles, Чили
- Еще не набирают
- Complejo Asistencial Dr. Victor Ríos Ruiz
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Контакт:
- Carolina Carrasco, MD
- Номер телефона: +56975583888
- Электронная почта: carolina.carrascoa@gmail.com
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Santiago, Чили
- Еще не набирают
- Hospital Clínico Dra. Eloísa Díaz Insunza de La Florida
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Контакт:
- Eduardo Chinchón, MD
- Номер телефона: +56994514773
- Электронная почта: doctorchinchon@gmail.com
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Talcahuano, Чили
- Рекрутинг
- Hospital Las Higueras de Talcahuano
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Контакт:
- Gonzalo Ramírez-Guerrero, MD
- Номер телефона: +56981746173
- Электронная почта: ramirezguerrero.g@gmail.com
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Контакт:
- Cristian Pedreros-Rosales, MD
- Электронная почта: cpedreros@me.com
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Младший исследователь:
- Rodrigo Ulloa, MD
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Младший исследователь:
- Jonathan Alarcón, MD
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Младший исследователь:
- Ricardo Ferrada, MD
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Quito, Эквадор
- Еще не набирают
- Hospital General Enrique Garces
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Контакт:
- Darío Jiménez, MD
- Номер телефона: +593992773176
- Электронная почта: dxjimenezmd@gmail.com
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Критерии участия
Критерии приемлемости
Критерии приемлемости
Возраст, подходящий для обучения
- Взрослый
- Пожилой взрослый
Принимает здоровых добровольцев
Метод выборки
Исследуемая популяция
Описание
Inclusion Criteria:
- Age ≥18 years
- Admission to an Intensive Care Unit
- Acute kidney injury according to KDIGO criteria
- Prescription of continuous renal replacement therapy (CRRT) with net ultrafiltration
- Clinical stability considered sufficient to initiate net ultrafiltration according to the treating clinical team
Exclusion Criteria:
- Chronic kidney replacement therapy prior to ICU admission
- Pregnancy
- Limitation of therapeutic effort or goals-of-care decisions at admission or during the observation period
- Inability to perform hemodynamic or perfusion assessment
- Extracorporeal membrane oxygenation (ECMO)
- Refusal to participate in the study
Учебный план
Как устроено исследование?
Детали дизайна
Количество групп / когорт
Когорты и вмешательства
Группа / когортаГруппа / когорта |
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AKI Patients Receiving CRRT With Net Ultrafiltration
Adult critically ill patients with acute kidney injury receiving continuous renal replacement therapy with prescribed net ultrafiltration.
Participants will be prospectively evaluated using a multiparametric monitoring strategy including clinical, hemodynamic, ultrasound, perfusion, and biochemical assessments.
Patients will subsequently be classified according to the development or absence of ultrafiltration intolerance during the observation period.
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Что измеряет исследование?
Первичные показатели результатов
Первичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Development of Ultrafiltration Intolerance
Временное ограничение: From UFNET initiation (T0) to 24 hours after initiation of net ultrafiltration
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Proportion of patients who develop ultrafiltration intolerance according to the protocol-defined composite criteria, including hypotension, increased vasopressor requirements, worsening peripheral perfusion, tissue hypoperfusion, or reduction/interruption of ultrafiltration due to instability.
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From UFNET initiation (T0) to 24 hours after initiation of net ultrafiltration
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Вторичные показатели результатов
Вторичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Incidence of Ultrafiltration Intolerance
Временное ограничение: From UFNET initiation (T0) to 24 hours.
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Percentage of participants who develop ultrafiltration intolerance during the observation period.
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From UFNET initiation (T0) to 24 hours.
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Net Ultrafiltration Rate (mL/kg/h)
Временное ограничение: From UFNET initiation (T0) to 24 hours.
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Prescribed and achieved net ultrafiltration rate during continuous renal replacement therapy.
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From UFNET initiation (T0) to 24 hours.
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Time to First Ultrafiltration Intolerance Event (hours)
Временное ограничение: From UFNET initiation to 24 hours.
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Time from UFNET initiation to the first occurrence of ultrafiltration intolerance.
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From UFNET initiation to 24 hours.
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Severity Category of Ultrafiltration Intolerance
Временное ограничение: From UFNET initiation to 24 hours.
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Proportion of participants classified as having mild, moderate, or severe ultrafiltration intolerance according to protocol-defined criteria.
Higher categories indicate greater severity of intolerance.
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From UFNET initiation to 24 hours.
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Agreement Between Hypotension-Based and Hypoperfusion-Based Definitions of Ultrafiltration Intolerance
Временное ограничение: From UFNET initiation to 24 hours.
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Agreement between intolerance defined by hypotension criteria and intolerance defined by tissue hypoperfusion criteria, assessed using Cohen's kappa coefficient.
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From UFNET initiation to 24 hours.
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Cumulative Fluid Balance (mL)
Временное ограничение: 24 hours after UFNET initiation
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Cumulative fluid balance achieved during the first 24 hours following UFNET initiation.
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24 hours after UFNET initiation
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Achieved Net Ultrafiltration Volume (mL)
Временное ограничение: 24 hours after UFNET initiation
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Total net ultrafiltration volume achieved during the observation period.
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24 hours after UFNET initiation
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Proportion of Participants Achieving Renal Recovery
Временное ограничение: Up to 90 days after UFNET initiation
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Percentage of participants who recover kidney function sufficiently to discontinue kidney replacement therapy according to the treating clinical team.
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Up to 90 days after UFNET initiation
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Ventilator-Free Days
Временное ограничение: Up to 28 days after UFNET initiation
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Number of days alive and free from invasive mechanical ventilation.
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Up to 28 days after UFNET initiation
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Intensive Care Unit Mortality
Временное ограничение: From UFNET initiation up to 90 days or ICU discharge, whichever occurs first
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Percentage of participants who die during intensive care unit admission.
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From UFNET initiation up to 90 days or ICU discharge, whichever occurs first
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Hospital Mortality
Временное ограничение: From UFNET initiation until hospital discharge, assessed up to 180 days
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Percentage of participants who die during hospital admission.
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From UFNET initiation until hospital discharge, assessed up to 180 days
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Соавторы и исследователи
Спонсор
Спонсор
Следователи
Следователи
- Главный следователь: Gonzalo Ramírez-Guerrero, MD, Hospital Las Higueras de Talcahuano
Публикации и полезные ссылки
Общие публикации
- Ruste M, Delas Q, Fellahi JL, Jacquet-Lagreze M. Perfusion variables and hemodynamic phenotypes during fluid removal via net ultrafiltration in continuous renal replacement therapy: a retrospective single-center cohort study. J Crit Care. 2026 Feb;91:155310. doi: 10.1016/j.jcrc.2025.155310. Epub 2025 Oct 15.
- Bige N, Lavillegrand JR, Dang J, Attias P, Deryckere S, Joffre J, Dubee V, Preda G, Dumas G, Hariri G, Pichereau C, Baudel JL, Guidet B, Maury E, Boelle PY, Ait-Oufella H. Bedside prediction of intradialytic hemodynamic instability in critically ill patients: the SOCRATE study. Ann Intensive Care. 2020 Apr 22;10(1):47. doi: 10.1186/s13613-020-00663-x.
- Wong A, Olusanya O, Watchorn J, Bramham K, Hutchings S. Utility of the Venous Excess Ultrasound (VEXUS) score to track dynamic change in volume status in patients undergoing fluid removal during haemodialysis - the ACUVEX study. Ultrasound J. 2024 Mar 27;16(1):23. doi: 10.1186/s13089-024-00370-9.
- da Hora Passos R, Caldas JR, Ramos JGR, Dos Santos Galvao de Melo EB, Silveira MAD, Batista PBP. Prediction of hemodynamic tolerance of intermittent hemodialysis in critically ill patients: a cohort study. Sci Rep. 2021 Dec 8;11(1):23610. doi: 10.1038/s41598-021-03110-4.
- Douvris A, Zeid K, Hiremath S, Bagshaw SM, Wald R, Beaubien-Souligny W, Kong J, Ronco C, Clark EG. Mechanisms for hemodynamic instability related to renal replacement therapy: a narrative review. Intensive Care Med. 2019 Oct;45(10):1333-1346. doi: 10.1007/s00134-019-05707-w. Epub 2019 Aug 12.
- Ruste M, Sghaier R, Chesnel D, Didier L, Fellahi JL, Jacquet-Lagreze M. Perfusion-based deresuscitation during continuous renal replacement therapy: A before-after pilot study (The early dry Cohort). J Crit Care. 2022 Dec;72:154169. doi: 10.1016/j.jcrc.2022.154169. Epub 2022 Oct 3.
- Bitker L, Dupuis C, Pradat P, Deniel G, Klouche K, Mezidi M, Chauvelot L, Yonis H, Baboi L, Illinger J, Souweine B, Richard JC. Fluid balance neutralization secured by hemodynamic monitoring versus protocolized standard of care in patients with acute circulatory failure requiring continuous renal replacement therapy: results of the GO NEUTRAL randomized controlled trial. Intensive Care Med. 2024 Dec;50(12):2061-2072. doi: 10.1007/s00134-024-07676-1. Epub 2024 Oct 17.
- Ramirez-Guerrero G, Ronco C, Rosner M. Ultrafiltration Tolerance and Improving Outcomes with Continuous Renal Replacement Therapies. Clin J Am Soc Nephrol. 2025 Mar 1;20(3):462-464. doi: 10.2215/CJN.0000000650. Epub 2024 Dec 26. No abstract available.
- Ramirez-Guerrero G, Ronco C. Ultrafiltration Tolerance: A Phenotype That We Need to Recognize. Blood Purif. 2024;53(7):541-547. doi: 10.1159/000537941. Epub 2024 Feb 20.
- Melo P, Ramirez-Guerrero G, Castro R, Wong A, Argaiz ER, Ostermann M, Hernandez G, Kattan E. Ultrafiltration in the critically ill patient: a framework for personalized care. Crit Care. 2026 Jan 24;30(1):87. doi: 10.1186/s13054-026-05836-x.
Даты записи исследования
Изучение основных дат
Начало исследования (Действительный)
Начало исследования
Первичное завершение (Оцененный)
Первичное завершение
Завершение исследования (Оцененный)
Завершение исследования
Даты регистрации исследования
Первый отправленный
Первый отправленный
Впервые представлено, что соответствует критериям контроля качества
Впервые представлено, что соответствует критериям контроля качества
Первый опубликованный (Действительный)
Первый опубликованный
Обновления учебных записей
Последнее опубликованное обновление (Действительный)
Последнее опубликованное обновление
Последнее отправленное обновление, отвечающее критериям контроля качества
Последнее отправленное обновление, отвечающее критериям контроля качества
Последняя проверка
Последняя проверка
Дополнительная информация
Термины, связанные с этим исследованием
Ключевые слова
Дополнительные соответствующие термины MeSH
- Урогенитальные заболевания
- Патологические процессы
- Мужские мочеполовые заболевания
- Заболевания почек
- Урологические заболевания
- Женские урогенитальные заболевания
- Женские мочеполовые заболевания и осложнения беременности
- Атрибуты болезни
- Почечная недостаточность
- Патологические состояния, признаки и симптомы
- Признаки и симптомы
- Критических заболеваний
- Острое повреждение почек
- Отек
Другие идентификационные номера исследования
Другие идентификационные номера исследования
- CEC-SST-15-2026
Планирование данных отдельных участников (IPD)
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Описание плана IPD
Информация о лекарствах и устройствах, исследовательские документы
Изучает лекарственный продукт, регулируемый FDA США.
Изучает продукт устройства, регулируемый Управлением по санитарному надзору за качеством пищевых продуктов и медикаментов США.
Эта информация была получена непосредственно с веб-сайта clinicaltrials.gov без каких-либо изменений. Если у вас есть запросы на изменение, удаление или обновление сведений об исследовании, обращайтесь по адресу register@clinicaltrials.gov. Как только изменение будет реализовано на clinicaltrials.gov, оно будет автоматически обновлено и на нашем веб-сайте. .