- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03756402
External Validation of IRRIV Test Relationship With Renal Functional Reserve (IRRIV-RFR)
November 27, 2018 updated by: Sara Samoni, Ospedale San Bortolo di Vicenza
The Relationship Between IRRIV and RFR Under Normal Conditions: External Validation
The assessment of renal functional reserve (RFR) has been proposed for the risk stratification of patients undergoing potentially nephrotoxic procedures.
The investigators hypothesized that there is a correlation between IRRIV and RFR under normal conditions.
For this purpose, externally validation of IRRIV test is performed in a validation cohort of healthy subjects.
Study Overview
Status
Completed
Conditions
Detailed Description
Normal subjects display a significant capacity to increase in baseline GFR under physiological needs (e.g.
pregnancy) or pathological states (e.g.
solitary kidney).
This capacity is known as renal functional reserve (RFR), and it is calculated as the difference between the measured maximum GFR achieved through a renal stress test and the baseline GFR measured in rest conditions.In clinical practice, the most common renal stress test is performed as a standardized protein loading test.
In a pilot study, the investigators demonstrated a significant correlation between RFR and the intra-parenchymal renal resistive index variation (IRRIV) during an echo renal stress test in a cohort of healthy volunteers.
IRRIV test has proven to be rapid, safe, bedside and easy to perform and it might represent a preliminary test in screening patients' RFR.
For this purpose, externally validation of IRRIV test is performed in a validation cohort of healthy subjects.
Study Type
Observational
Enrollment (Actual)
47
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Healthy subjects undergoing a protein loading and IRRIV test evaluation
Description
Inclusion criteria were:
- Age more than 18 years old;
- Baseline estimated GFR, calculated using the chronic kidney disease epidemiology collaboration (CKD-EPI) equation, greater than or equal to 60 ml/min/1.73 m2.
Exclusion criteria were:
- Age less than 18 years old;
- Comorbidities potentially affecting renal function (i.e. arterial hypertension, diabetes, vasculopathy, etc.;
- Chronic administration of drugs able to modify renal blood flow and/or GFR (angiotensin converting enzyme-inhibitors (ACEI), angiotensin receptor blockers (ARB), calcium channel blockers, loop diuretics etc.);
- Pregnancy;
- Ultrasound evidence of morphological kidney abnormalities and/or renal artery stenosis;
- Nonsteroidal anti-inflammatory drugs (NSAIDs) or contrast media in the 2 days before the tests.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
---|
Healthy Subjects
All subjects underwent protein loading test and IRRIV test on the same day.
The renal resistive index (RRI) measurements were performed by one trained sonographer using a multi-frequency convex probe through a manual RRI calculations.
The RRIs were measured on three interlobular arteries (superior, middle and inferior) in each kidney, and expressed as a mean value.
RFR was measured using an oral protein loading test and was then defined as the difference between the highest CrCl obtained after the protein load and the baseline CrCl measured on rest conditions.
Urinary creatinine and sCr were measured by the enzymatic method (IL testTM Instrumentation(R), Laboratory SpA, Milano, Italy) and by ILab650 (Instrumentation Laboratory, Werfen Group, Barcelona, Spain).
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Externally validate IRRIV test
Time Frame: Change from baseline to 60 minutes
|
A weight of 10% of the patient's body weight was applied on the abdomen.
RRIs were recorded in a middle interlobular artery, every minute for 10 minutes during the echo-renal stress test.
The lowest RRI reached was taken as reference (stress RRI).
The IRRIV was defined as the percentage difference between baseline RRI and stress RRI.
|
Change from baseline to 60 minutes
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Correlation between IRRIV test and RFR
Time Frame: Change from baseline to 60 minutes
|
Correlation between IRRIV and RFR is tested through a Pearson analysis.
Concordance between presence of RFR (i.e. a RFR≥15ml/min/1.73m2)
and a positive/uncertain/negative IRRIV is evaluated.
|
Change from baseline to 60 minutes
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Study Director: Claudio Ronco, MD, Ospedale San Bortolo di Vicenza
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Helpful Links
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
September 2, 2015
Primary Completion (Actual)
November 30, 2015
Study Completion (Actual)
January 10, 2016
Study Registration Dates
First Submitted
November 26, 2018
First Submitted That Met QC Criteria
November 26, 2018
First Posted (Actual)
November 28, 2018
Study Record Updates
Last Update Posted (Actual)
November 29, 2018
Last Update Submitted That Met QC Criteria
November 27, 2018
Last Verified
November 1, 2018
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 0103/15
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
UNDECIDED
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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