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Peritoneal DialysisLUSiPDNCT03801044

Lung Ultrasound in PD Patients

An observational study of Peritoneal Dialysis and Hypervolemia, run by Sisli Hamidiye Etfal Training and Research Hospital at 1 site in Turkey (Türkiye).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Although many alternative methods are present, maintaining ideal volume status in peritoneal dialysis (PD) patients still rely on clinical evaluation due to lack of an evidence based method. Lung ultrasound (LUS) is a new method for evaluation of hidden congestion in this group. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
NT-BNP, VEGF, Echocardiography and Chest Radiography
Type of treatment
Surgery or procedure
How many people
23 participants
Where
1 siteTurkey (Türkiye)
Study dates
1 May 2018to 1 Sep 2018
Phase
Observational
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • Adult, Older adult

Study population: All peritoneal dialysis patients in the clinic have been invited to the study. Twenty three patients were enrolled to the study. Two patients excluded from study because of immobility.

Who may be able to join

  • Patients older than 18 years old,
  • History of PD more than 3 months,
  • Providing written informed consent

Who cannot join

  • Patients younger than 18 years old,
  • Unwilling to participate to the study,
  • Immobile patients unable to perform test in the same day,
  • History of PD less than 3 months,
  • Presence of active infection,
  • History of lung cancer and/or operations.

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Mustafa Sevinc

    Istanbul

Other trials in Turkey (Türkiye)

About this study

Official title: Comparison of Lung Ultrasound and Other Volumetric Methods in Peritoneal Dialysis Patients

Although many alternative methods are present, maintaining ideal volume status in peritoneal dialysis (PD) patients still rely on clinical evaluation due to lack of an evidence based method. Lung ultrasound (LUS) is a new method for evaluation of hidden congestion in this group. LUS findings and its relationship with other volumetric methods are investigated in this study. LUS was performed to all peritoneal dialysis patients and compared with symptoms of hypervolemia, physical examination, vascular endothelial growth factor-C (VEGF-C) and N-terminal pro-brain natriuretic peptide levels, chest radiography, echocardiography, bioelectrical impedance analysis.

Read the detailed description

Maintaining volume control is crucial in all renal replacement therapy modalities. Fluid overload is associated with increased mortality both in hemodialysis patients and peritoneal dialysis (PD) patients although peritoneal dialysis has the advantage of better preservation of residual renal function compared to hemodialysis. Many methods have been used to fine tune the volume status of patients including physical examination, chest radiography, blood pressure, laboratory parameters, echocardiography, bioelectrical impedance analysis (BIA), ultrasound for lung.

Symptoms of hypervolemia are mainly paroxysmal nocturnal dyspnea, orthopnea, edema, dyspnea on exertion. On physical examination, hypertension or hypotension, third heart sound, jugular venous distension, rales, edema can be seen. Pulmonary venous congestion, cardiomegaly, interstitial edema, alveolar edema, pleural effusion can be seen on chest radiographies.

Level of N-terminal pro-brain natriuretic peptide (NT-proBNP) increases upon stretching of cardiac myocytes. This is accepted as a reflection of volume status. There are a few studies in which NT-proBNP was found as a useful marker for hypervolemia both in hemodialysis and peritoneal dialysis population.

Vascular endothelial growth factor-C (VEGF-C) is an osmosensitive gene product secreted by macrophages through activation of tonicity-responsive enhancer binding protein found in mononuclear phagocyte system cells infiltrating the interstitium. The result is hypertonic sodium accumulation in the skin which is accepted as a buffer mechanism maintaining blood pressure homeostasis. Serum VEGF-C levels had been found as a promising marker of hypervolemia in a hemodialysis patient cohort by a recent study.

Echocardiography has been used extensively in dialysis patients in which a number of parameters have been measured. Bioelectrical impedance analysis (BIA) is another non-invasive bedside method for the evaluation of volume status.

Lung ultrasound (LUS) is a technique that has become popular in nephrology recently. "B lines" or "lung comets" are the reverberation artifacts arising from the pleural line. They are produced due to thickened subpleural interlobular septa by edema.

The gold standard for volume assessment is isotope dilution and neutron activation analysis methods which are only limited to research activities. The best widely accepted, non-invasive, practical, easy to access method has not been decided yet. Moreover evidence is quite scarce for the peritoneal dialysis than hemodialysis or normal renal functioning group. Lung ultrasound is the most recent promising method for volume control.

The investigators aimed to define lung ultrasound findings in our peritoneal dialysis cohort and its relation with other volumetric parameters.

Being tested
NT-BNP, VEGF, Echocardiography, Chest Radiography, Lung Ultrasound, Bioelectrical Impedence Analysis
Medical subject headings
Edema

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • NT-BNP, VEGFDiagnostic test

    VEGF-C levels were measured in the serum samples. R\&D Systems kit (Minneapolis, MN) (Catalog Number DVEC00) was used for the assays according to the user instructions. NT-proBNP was measured on the Elecsys 2010 analyzer (Elecsys proBNP Immunoassay; Roche Diagnostics).

  • EchocardiographyDiagnostic test

    Transthoracic echocardiography was performed by the same cardiologist blinded to all other parameters. It was done while abdomen was empty. LV end diastolic diameter (mm), interventricular septum thickness (mm), posterior wall thickness (mm), ejection fraction (%), left ventricle end diastolic volume (ml), left atrial volume (ml), left ventricle mass index (LVMI) (g/m2), left ventricle filling velocity(cm/sec), E/E' ratio, pulmonary artery systolic pressure (mm Hg) were the parameters taken by echocardiography

  • Chest RadiographyRadiation

    All radiographies were taken when the patient was standing erect position during deep inhalation. They were reported by an expert radiologist blinded to clinical data. Films taken at supine position or during exhalation were excluded. Chest radiographies were classified into 3 stages to reflect degree of hypervolemia. Stage 1 was redistribution defined as increased artery-to-bronchus ratio in the upper and middle lobes. Stage 2 was interstitial edema evident by Kerley B lines and peribronchial cuffing. Stage 3 was alveolar edema phase perihilar consolidation and air bronchograms, pleural fluid, increased width of the vascular pedicle, enlarged cardiac silhouette.

  • Lung UltrasoundDiagnostic test

    It was performed by 28 area method which contains ultrasound examination from second to fifth intercostals spaces at parasternal region, midclavicular line, anterior and mid axillary lines. Lung ultrasound had been done by same radiologist who was an expertise in ultrasonography blinded to all other parameters. It was performed by 1,6 megaHertz convex probe when patient lying at the supine position.

  • Bioelectrical Impedence AnalysisDiagnostic test

    The Body Composition Monitor (BCM) (type 0BJA1394, Fresenius Medical Care AG \& Co. KGaA, D-61343 Bad Homburg) was used for assessment of hydration status in patients. Peritoneal cavities were free of intraperitoneal fluid during measurement. Patients were accepted as normovolemic if their result were between -1.1lt and 1.1 lt.

Study groups in NCT03801044
Study groupRoleWhat they receive
PD patientsAll PD patients treated in out unit were enrolled.
Receives: Diagnostic Test: NT-BNP, VEGF; Diagnostic Test: Echocardiography; Radiation: Chest Radiography; Diagnostic Test: Lung Ultrasound; Diagnostic Test: Bioelectrical Impedence Analysis

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Association Between Number of Kerley B Lines by Ultrasound and Serum VEGF-C Level (pg/ml) by Enzyme-linked Immunosorbent Assay

    Assessing the relationship between number of Kerley B lines by ultrasound and serum VEGF-C level (pg/ml) by enzyme-linked immunosorbent assay

    Measured: 4 months

Secondary outcomes (15)
  1. Association Between Number of Kerley B Lines by Ultrasound and Dyspnea by Questionnaire

    Assessing the relationship between number of Kerley B lines by ultrasound and dyspnea by questionnaire

    Measured: 4 months

  2. Association Between Number of Kerley B Lines by Ultrasound and Class of New York Heart Association Classification

    Assessing the relationship between number of Kerley B lines by ultrasound and class of New York Heart Association Classification

    Measured: 4 months

  3. Association Between Number of Kerley B Lines by Ultrasound and Presence of Third Sound/Pretibial Edema by Auscultation/Edema by Physical Examination

    Assessing the relationship between number of Kerley B lines by ultrasound and presence of third sound (S3) by auscultation/edema by physical examination

    Measured: 4 months

  4. Association Between Number of Kerley B Lines by Ultrasound Left Ventricle End Diastolic Diameter (mm) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and left ventricle end diastolic diameter (mm) obtained by the cardiologist with echocardiography

    Measured: 4 months

  5. Association Between Number of Kerley B Lines by Ultrasound Interventricular Septum Thickness (mm) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B by ultrasound and interventricular septum thickness (mm) (mm) obtained by the cardiologist with echocardiography

    Measured: 4 months

  6. Association Between Number of Kerley B by Ultrasound and Posterior Wall Thickness (mm) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B by ultrasound and posterior wall thickness (mm) obtained by the cardiologist with echocardiography

    Measured: 4 months

  7. Association Between Number of Kerley B Lines by Ultrasound and Ejection Fraction (%) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and ejection fraction (%) obtained by the cardiologist with echocardiography

    Measured: 4 months

  8. Association Between Number of Kerley B Lines by Ultrasound and Left Ventricle End Diastolic Volume (ml) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and left ventricle end diastolic volume (ml) obtained by the cardiologist with echocardiography

    Measured: 4 months

  9. Association Between Number of Kerley B Lines by Ultrasound and Left Atrial Volume (ml) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and left atrial volume (ml) obtained by the cardiologist with echocardiography

    Measured: 4 months

  10. Association Between Number of Kerley B Lines by Ultrasound and Left Ventricle Mass Index (g/m2) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and left ventricle mass index (g/m2) obtained by the cardiologist with echocardiography

    Measured: 4 months

  11. Association Between Number of Kerley B Lines by Ultrasound and Left Ventricle Filling Velocity (cm/Sec) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and left ventricle filling velocity (cm/sec) obtained by the cardiologist with echocardiography

    Measured: 4 months

  12. Association Between Number of Kerley B Lines by Ultrasound and Early Mitral Inflow Velocity and Mitral Annular Early Diastolic Velocity (E/E') Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and early mitral inflow velocity and mitral annular early diastolic velocity (E/E') obtained by the cardiologist with echocardiography

    Measured: 4 months

  13. Association Between Number of Kerley B Lines by Ultrasound and Pulmonary Artery Systolic Pressure (mmHg) Obtained by the Cardiologist With Echocardiography

    Assessing the relationship between number of Kerley B lines by ultrasound and pulmonary artery systolic pressure (mmHg) obtained by the cardiologist with echocardiography

    Measured: 4 months

  14. Association Between Number of Kerley B Lines by Ultrasound and Bioimpedance Analysis [Assessed With the Body Composition Monitor; Normovolemic if Their Result Between -1,1 lt and 1,1 lt)

    Assessing the relationship between number of Kerley B lines by ultrasound and bioimpedance analysis [assessed with the body composition monitor; normovolemic if their result between -1,1 lt and 1,1 lt)

    Measured: 4 months

  15. Association Between Number of Kerley B Lines by Ultrasound and NT-proBNP Level (pg/ml) by Elecsys proBNP Immunoassay

    Assessing the relationship between number of Kerley B lines by ultrasound and NT-proBNP level (pg/ml) by Elecsys proBNP Immunoassay

    Measured: 4 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Jan 2019
  2. Study start1 May 2018
  3. Primary completion1 Sep 2018
  4. Study completion1 Sep 2018

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Cross-sectional
Enrolment
23 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03801044
Sponsor's protocol ID
1908
Acronym
LUSiPD
Status last verified
Mar 2020
First submitted
14 Dec 2018
Last updated
8 Apr 2020
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

An observational study of Peritoneal Dialysis and Hypervolemia, run by Sisli Hamidiye Etfal Training and Research Hospital at 1 site in Turkey (Türkiye).

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 8 Apr 2020. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 31 Mar 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Association Between Number of Kerley B Lines by Ultrasound and Serum VEGF-C Level (pg/ml) by Enzyme-linked Immunosorbent Assay (time frame: 4 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 Apr 2020.

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