The Safety and Feasibility of the eLym™ System (DELTA-HF)

January 4, 2026 updated by: WhiteSwell, Limited

The Safety and Feasibility of the eLym™ System for the Decongestion of Excess Lymphatic Fluid Via the Thoracic Duct in Acute Decompensated Heart Failure

The goal of this feasibility study is to evaluated the safety and performance of the WhiteSwell eLym System in the treatment of fluid overload or congestion in adult patients with Acute Decompensated Heart Failure (ADHF). The main question[s] it aims to answer are:

  • Acute device safety (30 days)
  • Chronic device safety (31-180 days)
  • Primary performance Outcomes (Technical success and patient treatment outcomes)

Participants who are hospitalized for ADHF will be screened for treatment with the eLym System. The System, placed in a heart catheterization laboratory, will be temporarily placed for up to 60 hours to treat congestion. The patient will be followed during the hospital stay through discharge and have follow-up assessments at 30-, 60-, 90- and 180-days.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

70

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Georgia
    • Georgia
      • Tbilisi, Georgia, Georgia, 0112
        • Terminated
        • Israeli-Georgian Medical Research Clinical Helsicore
      • Tbilisi, Georgia, Georgia, 0159
        • Recruiting
        • Tbilisi Heart and Vascular Center
        • Principal Investigator:
          • George Khabeishvili, MD
        • Contact:
      • Tbilisi, Georgia, Georgia, 0186
        • Recruiting
        • Tbilisi Heart Centre
        • Contact:
        • Principal Investigator:
          • Archil Chukhrukidze, MD
  • Poland
  • Spain
      • Badalona, Spain, 08916
      • Madrid, Spain
        • Recruiting
        • Hospital 12 de Octubre
        • Contact:
        • Principal Investigator:
          • María Dolores García-Cosío
        • Principal Investigator:
          • Jorge Nuche
      • Majadahonda, Spain
      • San Carlos, Spain
      • Valencia, Spain, 46010
        • Recruiting
        • Hospital Clinico Universitario de Valencia
        • Contact:
        • Contact:
      • Valladolid, Spain
        • Recruiting
        • Hospital Clínico de Valladolid
        • Contact:
        • Principal Investigator:
          • Ignacio Amat
        • Principal Investigator:
          • Javier López
    • Spain
      • Barcelona, Spain, Spain
        • Recruiting
        • Hospital Clinic De Barcelona
        • Contact:
        • Principal Investigator:
          • Omar Abdul-Jawad Altisent

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

No

Description

Inclusion Criteria:

  1. Age ≥ 18 years
  2. Subject is admitted to the hospital with a primary diagnosis of Acute Decompensated Heart Failure (ADHF)

  3. Subjects receiving intravenous (IV) diuretic for decompensated heart failure and demonstrating fluid overload. This includes peripheral edema ≥2+ (on a 0 to 4+ scale) and a minimum of 1 of the following:

    • Jugular venous distension ≥10 cm H20;
    • Pulmonary edema as determined by auscultation or imaging;
    • Hepatojugular reflux;
    • Paroxysmal nocturnal dyspnea or ≥ two-pillow orthopnea;
    • Dyspnea at rest with respiration rate ≥20 per minute.
  4. Total DAILY diuretic dose prior to admission of ≥80mg Lasix or equivalent
  5. Renal function parameters as measured by estimated glomerular filtration rate (eGFR) ≥20 ml/min/1.73m2

  6. Subject must meet on one of the following criteria:

    • Subject has had a heart failure hospitalization or worsening of heart failure event requiring IV diuretic therapy (in hospital, emergency room, urgent care, or HF clinic) within the previous 6 months;
    • Renal function as measured by eGFR ≥20 and ≤45 ml/min/1.73m2;
    • At initial HF admission, <600 ml of urine output within 6 hours of initial IV bolus or urine sodium of <50 mmol/L at 1-2 hours after initial IV diuretic dose.

  7. Elevated N-Terminal (NT) Pro B-type Natriuretic Peptide (BNP) or BNP:

    • NT Pro BNP >1000 pg/ml (>1500 for subjects with atrial fibrillation);
    • BNP >250 pg/ml (>375 for subjects with atrial fibrillation).
  8. Albumin >2.5 g/dL
  9. Subject must be able to have device placement procedure within 96 hours of presentation to the hospital and still be demonstrating fluid overload at the time of device placement
  10. Subject willing and able to complete study assessments and agrees to comply with all follow-up evaluations
  11. Subject has provided written informed consent

Exclusion Criteria:

  1. Ultrasound Screening Assessment Exclusion:

    • Subjects' anatomy is not compatible with product dimensions as defined on the eLym system labelling
  2. Subjects requiring intravenous vasoactive therapies (e.g., vasodilators, inodilators, inotropes), mechanical ventilation, MCS, or ultrafiltration
  3. Subject has experienced a thromboembolic event [e.g., pulmonary embolism (PE), deep vein thrombosis (DVT), transient ischemic attack (TIA), or cerebrovascular events (CVA)] within the previous 6 months
  4. Subject has contraindications to systemic anticoagulation
  5. Subject currently on Dabigatran
  6. Subject with International Normalized Ratio (INR) >2.2 not due to anticoagulation therapy, hypercoagulable state including heparin-induced thrombocytopenia, or on novel anticoagulants (NOACs) that cannot be held for a minimum of 24 hours prior to eLym System placement Note: If subject's INR is >2.2 at the screening and baseline assessment, it may be repeated to assess eligibility up to the time of the procedure.
  7. Previous intracranial bleed unless there is documentation that the patient can safely use anticoagulation for 3 days
  8. Gastrointestinal (GI) bleeding within 6 months requiring hospitalization and/or transfusion.
  9. Recent major surgery within 30 days if the surgical would is judged to be associated with increased risk of bleeding.
  10. Platelet count <75 10^3/μL
  11. Inability to tolerate anticoagulation therapy for up to 3 days
  12. Subject with systolic blood pressure <85 millimeters of mercury (mmHg) at time of enrollment
  13. Subject has severe liver disease, liver fibrosis, or hempatorenal syndrome
  14. Subject has evidence of active blood stream infection or pneumonia
  15. Sustained malignant arrhythmias [e.g., ventricular tachycardia/fibrillation) in the last 90 days]
  16. Subject with acute coronary syndrome (ACS) in the last 3 months
  17. Subject with severe concomitant disease expected to prolong hospitalization or expected to cause death in ≤ 90 days
  18. Subject with a rhythm management device implanted within the last 45 days (i.e., cardioverter/defibrillator, pacemaker, cardiac resynchronization device)
  19. Subject is pregnant or lactating. Women of childbearing age who are not post-menopausal or not surgically sterile will need to demonstrate a negative urine or serum test.
  20. Physician discretion

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

  • Primary Purpose: Device Feasibility
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Open Label Treatment Arm
Hospitalized patients with acute decompensated heart failure that meet eligibility criteria will have an eLym System temporarily placed via left internal jugular access. The eLym System will be in place for up to 60 hours.
Device: WhiteSwell eLym System
The WhiteSwell eLym™ System is designed to treat congestion in Acute Decompensated Heart Failure (ADHF) patients. The device comprises two endovascular components, a Catheter and a Sheath, that are used in combination with a Console. The device is designed to create a low-pressure zone at the Thoracic Duct Outflow which is located adjacent to the venous angle (junction of the left subclavian vein and left internal jugular vein). This low-pressure region facilitates movement of fluid (lymph) from the interstitial compartment through the lymphatic system and the Thoracic Duct and into the intravascular space, while removal of fluids from the intravascular space is enabled using diuretic therapy. The treatment duration will be up to 60 hours.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Acute safety as assessed by the rate of acute adjudicated device-, treatment-, and procedure-related Serious Adverse Events
Time Frame: Device placement skin puncture to 30 days post therapy
The rate of acute device-, treatment-, and procedure-related Serious Adverse Events (SAE) as adjudicated by an independent Clinical Events Committee will be reported.
Device placement skin puncture to 30 days post therapy
Chronic safety as assessed by the rate of chronic adjudicated device-, treatment-, and procedure-related Serious Adverse Events (SAE)
Time Frame: Day 31 out to 180 days post therapy
The rate of chronic device-, treatment-, and procedure-related Serious Adverse Events (SAE) as adjudicated by an independent Clinical Events Committee will be reported.
Day 31 out to 180 days post therapy
Technical system performance as measured by the rate of procedures that demonstrate the user's ability to deploy, activate and remove the system.
Time Frame: Device placement procedure through eLym System therapy end (therapy lasting less than or equal to 72 hours)
The system's technical performance will be assessed by evaluating the rate of procedures in which the user is able to deploy, activate and remove the system.
Device placement procedure through eLym System therapy end (therapy lasting less than or equal to 72 hours)
Acute response to therapy as evaluated by changes in the patients' body weight
Time Frame: Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission)
Patients' acute response to therapy will be evaluated by assessing changes in body weight as measured in kilograms at baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission). The change in weight will be expressed as an absolute change and percent change with an expected decrease corresponding to a treatment response.
Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission)
Acute response to therapy as evaluated by changes in patients' net fluid loss or gain (milliliters)
Time Frame: Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission)
Patients' acute response to therapy will be evaluated by assessing changes in patients' net fluid loss or gain based in total intake and output over 24 hours and expressed in milliliters at baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission). An expected net fluid loss would correspond to a treatment response.
Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation) and at discharge from the hospital (expected 3 - 10 days after hospital admission)
Acute response to therapy as evaluated by assessing changes in patients' renal function using estimated glomerular filtration rate (eGFR)
Time Frame: Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation), discharge from the hospital (expected 3 - 10 days after hospital admission), and at 30 day follow-up
Patients' acute response to therapy will be evaluated by assessing changes in renal function as measured by estimated glomerular filtration rate (eGFR) (ml/min/1.73 (2)) using the Modification of Diet in Renal Disease (MDRD) calculation. Stable renal function would indicate a neutral response to therapy.
Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation), discharge from the hospital (expected 3 - 10 days after hospital admission), and at 30 day follow-up
Acute response to therapy as evaluated by assessing changes in patients' renal function using laboratory parameter serum creatinine
Time Frame: Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation), discharge from the hospital (expected 3 - 10 days after hospital admission), and at 30 day follow-up
Patients' acute response to therapy will be evaluated by assessing changes in renal function as measured by changes in serum creatinine (mg/dL). Stable renal function would indicate a neutral response to therapy.
Baseline (prior to eLym therapy), after eLym therapy (less than or equal to 72 hours after therapy initiation), discharge from the hospital (expected 3 - 10 days after hospital admission), and at 30 day follow-up
Acute response to therapy as evaluated by the need for intensified heart failure therapy(ies) over the course of the hospitalization
Time Frame: Patient enrollment through hospital discharge (typically 3 - 10 days from admission to the hospital)
Patients' acute response to therapy will be evaluated by assessing the need for intensified heart failure therapies indicating a worsening of the patient's condition, specifically evaluating the use of mechanical circulatory support, intravenous inotropes, or intravenous venodilators.
Patient enrollment through hospital discharge (typically 3 - 10 days from admission to the hospital)
Acute response to therapy as evaluated by assessing Extra Vascular Lung Water (EVLW) measured by Sensible Medical's ReDS technology.
Time Frame: Baseline (pre eLym System therapy) and post eLym System therapy (less than or equal to 72 hours after the initiation of therapy)
Patients' acute response to therapy will be evaluated by assessing Extra Vascular Lung Water (EVLW) as measured by Sensible Medical ReDS technology. The digital readout is provide as percent (%) with increasing numbers indicating a higher percentage of lung water and more congestion. Normal is consider to be less than 30%. Assessments will be made on seated patients prior to and just after the completion of therapy (less than or equal to 72 hours after the initiation of therapy).
Baseline (pre eLym System therapy) and post eLym System therapy (less than or equal to 72 hours after the initiation of therapy)
Patient Quality of Life as evaluated by the Kansas City Quality of Life Questionnaire (KCCQ).
Time Frame: Baseline, Hospital discharge (typically 3- 10 days post hospital admission), 30-, 90-, and 180-days after hospital discharge.
Changes in patients' quality of life will be assessed based on responses to the Kansas City Cardiomyopathy Questionnaire (KCCQ). The KCCQ is a 23-item self-administered questionnaire developed to independently measure the patient's perception of their health status, which includes heart failure symptoms, impact on physical and social function, and how their heart failure impacts their quality of life (QOL) within a 2-week recall period. All items are measured on a Likert scale with 5-7 response options. All KCCQ scores are scaled from 0 to 100 and frequently summarized in 25-point ranges, where scores represent health status as follows: 0 to 24: very poor to poor; 25 to 49: poor to fair; 50 to 74: fair to good; and 75 to 100: good to excellent. The scale will be administered at baseline, hospital discharge, and 30- 90- and 180- days post discharge.
Baseline, Hospital discharge (typically 3- 10 days post hospital admission), 30-, 90-, and 180-days after hospital discharge.
Chronic response to therapy as evaluated by assessing changes in N Terminal-Pro Brain Natriuretic Peptide (NT-ProBNP) or Brain Natriuretic Peptide (BNP) biomarker levels
Time Frame: Baseline and 30-, 90-, and 180-days after hospital discharge
Changes in N Terminal Pro Brain Natriuretic Peptide in picograms/milliliter (pg/ml) (NT-ProBNP) or Brain Naturiretic Peptide picograms/milliliter (pg/ml)(BNP) will assessed to evaluate the patient heart failure status at baseline, 30-, 90- and 180- days. NT-ProBNP or BNP increases are noted with increased patient congestion. A reduction in NT-ProBNP or BNP would indicate a patient improvement. Changes in NT-ProBNP or BNP will be expressed as an absolute change and a percent change from baseline.
Baseline and 30-, 90-, and 180-days after hospital discharge
Long term patient outcomes as evaluated by the time (days) to rehospitalization for acute decompensated heart failure
Time Frame: Hospital discharge through 180 days post hospital discharge
Patients' need for rehospitalization for acute decompensated heart failure will be reported as observed starting at hospital discharge post therapy through the 180-day follow up window. An independent clinical events committee will adjudicate hospitalizations for heart failure relatedness.
Hospital discharge through 180 days post hospital discharge

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

WhiteSwell, Limited

Investigators

  • Study Director: William Abraham, MD, Ohio State University

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.

General Publications

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)

February 28, 2023

Primary Completion (Estimated)

December 1, 2026

Study Completion (Estimated)

December 1, 2026

Study Registration Dates

First Submitted

January 6, 2023

First Submitted That Met QC Criteria

February 24, 2023

First Posted (Actual)

February 28, 2023

Study Record Updates

Last Update Posted (Estimated)

January 7, 2026

Last Update Submitted That Met QC Criteria

January 4, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • DELTA-HF CIP-01

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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