Furosemide Alone or Unexpectedly With Solution of Hypertonic Saline in Nephrotic Syndrome

  • STATUS
    Recruiting
  • End date
    Mar 1, 2022
  • participants needed
    30
  • sponsor
    Medical University of Bialystok
Updated on 16 February 2021
proteinuria
hypoalbuminemia
diuretic treatment

Summary

The trial will test the hypothesis that hypertonic saline on top of standard diuretic treatment will help achieve adequate diuresis in patients with nephrotic syndrome.

Description

Objectives

Edema is one of the major clinical manifestations of nephrotic syndrome. All patients are initially treated with diuretics and sodium restriction but the results are sometimes not satisfactory. Hypertonic saline solutions have been studied in congestive heart failure and a meta-analysis confirmed it's role in achieving adequate diuresis and protecting patients against acute kidney injury although the proposed mechanism of action is not known (osmotic action?, inhibition of renin-angiotensin-aldostrerone system?, increase in renal perfusion?, myocardial contractility?). The investigators therefore hypothesized that it may exert beneficial effects also in nephrotic syndrome.

Treatment protocol:

A prospective placebo-controlled randomized trial. Subjects will be randomized to high-dose furosemide vs high-dose furosemide plus hypertonic intravenous saline in a 1:1 fashion. All subjects will receive furosemide tid (starting with 3x40 mg i.v.) with or without hypertonic saline solution (3x100 ml of 3% NaCl - in a combined infusion lasting 10 minutes). Subjects randomized to furosemide only will receive 3x100 ml of 5% glucose (in a combined infusion lasting 10 minutes). The dose of furosemide will be determined by the investigator based on patients weight, severity of edema, 24-h urine volume, kidney function. In case of poor clinical response (urine volume below 1000 ml) the investigator will be able to titrate the furosemide dose up to 3x180 mg i.v. All patients will be kept on low-salt diet and water restriction (500-1000 ml/day), their weight will assessed every morning before breakfast and measurement of 24-h urine volume will be performed every day. Additionally BNP levels will be measured at baseline and after 5 days of treatment. Treatment will be continued for 5 days. The primary measure of efficacy will be urine volume and the rate of acute kidney injury (AKI), secondary measure of efficacy will be the expected decrease in brain natriuretic peptides (BNP) levels and the length of hospitalization.

Hydrochlorothiazide, spironolactone and other diuretics use will be contraindicated during the study. Patients will be required to receive standard concurrent therapy as determined by their attending physician and according to current guidelines (including steroids and other immunosuppresives).

Details
Condition Nephrotic Syndrome
Treatment Hypertonic saline, Furosemide Injection
Clinical Study IdentifierNCT03750136
SponsorMedical University of Bialystok
Last Modified on16 February 2021

Eligibility

Yes No Not Sure

Inclusion Criteria

Is your age greater than or equal to 18 yrs?
Gender: Male or Female
Do you have Nephrotic Syndrome?
Do you have any of these conditions: Do you have Nephrotic Syndrome??
Do you have any of these conditions: Do you have Nephrotic Syndrome??
Do you have any of these conditions: Do you have Nephrotic Syndrome??
consecutive patients with nephrotic syndrome (proteinuria over 3.5 g/day, edema, hypoalbuminemia, dysproteinemia) admitted to II Nephrology Department from November 2018 onwards within 48h of admission
age above 18
informed consent

Exclusion Criteria

AKI (acute kidney injury) - AKIN criteria level 3
CKD (chronic kidney disease) stage 4 and 5 according to KDIGO (Kidney Disease: Improving Global Outcomes)
concomittant heart failure NYHA (New York Heart Association) class III or worse
active liver disease and liver failure
terminal neoplastic disease
serum sodium above 145 mmol/l
pregnancy
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