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Furoscix in Heart Failure Patients With Diuretic Resistance

Efficacy of Furoscix in Heart Failure Patients With Diuretic Resistance

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05528588
Acronym
RESISTANCE-HF
Enrollment
70
Registered
2022-09-06
Start date
2023-06-02
Completion date
2024-07-01
Last updated
2025-07-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Heart Failure

Brief summary

This will be a randomized, open-label pilot study of 70 patients with and without diuretic resistance who were recently admitted and discharged for acute decompensated heart failure with and oral diuretic regimen testing whether Furoscix is more effective at achieving post-discharge outpatient diuresis than standard of care. Diuretic resistance will be identified using the BAN-ADHF (BUN, creAtinine, NP-levels, Age, Diabetes and DBP, HF hospitalization, and atrial Fibrillation) score which has been integrated into the electronic health record. The score is integer-based with a score of ≥ 12 indicating diuretic resistance with high likelihood of poor outcomes. The primary outcome is diuretic efficacy as measured by volume of urine produced 8 hours after treatment and urine sodium levels (assessed hourly or per urination episode within 8 hours of treatment).

Detailed description

Heart failure is one of the leading causes of hospitalization in the United States, contributing to over 1 million emergency department visits and nearly 1 million hospitalizations for HF annually. The estimated mean cost for HF was $11,552 in 2014, totaling an estimated $11 billion. Thus, strategies to reduce the burden of acute care use for patients with heart failure are necessary. Acute decompensation of heart failure is characterized by volume overload and is primarily treated with intravenous diuretics. However, inefficient and ineffective diuresis both during hospitalization and in the post-discharge environment predispose patients to frequent readmission and a worse prognosis. Importantly, there is heterogeneity in patient response to intravenous diuresis, with an estimated 20-50% of patients having poor response to initial IV diuretic therapy. Patients who are resistant to intravenous diuresis have increased risk of rehospitalization and mortality. Importantly, our group recently derived an integer-based risk score (BAN-ADHF score) to predict patients with low diuretic efficiency. The investigators will screen eligible patients in the inpatient setting and schedule a research appointment within 14 days after discharge. At the research appointment, patients will be consented and undergo stratified randomization based on BAN-ADHF score (≥ 12 vs. \<=11). Within each stratum, patients will be randomized in a 1:1 ratio (intervention: control). The intervention arm (Furoscix over 5 hours at 8mg/mL) will be compared to a usual care group (home oral diuretic dose prescribed by discharge physician). Patients will be monitored for 8 hours in the Clinical Research Unit post-drug administration for clinical safety and to measure clinical response. This study will take place at the Clinical Research Unit in the Aston Building at UT Southwestern Medical Center.

Interventions

COMBINATION_PRODUCTFuroscix

Study Drug: Furoscix®, (Furosemide Injection), 80 mg/10 mL is a proprietary furosemide formulation that is buffered to a neutral pH to enable subcutaneous administration and contained in a prefilled Crystal Zenith® (CZ) cartridge. Study Device: The Infusor is a compact, ethylene oxide (EtO) sterilized, single-use, electro-mechanical (battery powered, micro-processor controlled), on-body subcutaneous delivery system based on the SmartDose® Gen II 10 mL (West Pharmaceutical Services). The Furoscix Infusor is an investigational drug-device combination product. The Infusor is applied to the abdomen via a medical grade adhesive and delivers a subcutaneous infusion of Furoscix through a pre-programmed, biphasic delivery profile with 30 mg (3.75 mL) administered over the first hour, followed by 12.5 mg (1.56 mL) per hour for the subsequent 4 hours (Total dose is 80 mg (10 mL) over 5 hours).

Patients will receive home dose oral furosemide or oral furosemide per standard of care.

Sponsors

scPharmaceuticals, Inc.
CollaboratorINDUSTRY
University of Texas Southwestern Medical Center
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Patients will undergo stratified randomization based on BAN-ADHF score (0-11 vs. ≥ 12). Within each stratum, patients will be randomized in a 1:1 ratio (intervention: control).

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* English-speaking patients discharged after ward hospitalization for acute decompensated heart failure * Able to be screened and enrolled within 14 days of hospitalization * Recent echocardiogram (6 months or less) * Discharged with home diuretic regimen

Exclusion criteria

* Chronic kidney disease stage 5 (eGFR\<20) or End Stage Kidney Disease * Systolic blood pressure \<100 * ICU hospitalization within 3 months * Inotrope use within last 3 months * Home inotropes * Electrolyte abnormalities on discharge * Inadequate data for BAN-ADHF score * Pregnant * Prior heart transplantation or left ventricular assist device * Low-output heart failure * Concurrent use of non-loop diuretic * Advanced liver disease * Severe malnutrition * Skin/Soft tissue condition precluding Furoscix * Inability to collect urine

Design outcomes

Primary

MeasureTime frameDescription
Post-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.1 dayPost-treatment diuretic efficiency is measured by cumulative urine output in mL per mg of treatment, observed hourly through 8 hours following the administration of study therapy (Furoscix vs. oral furosemide).

Secondary

MeasureTime frameDescription
Post-treatment Peak Spot Urine Sodium Levels in 1 Day1 dayPost-treatment peak spot urine sodium levels assessed hourly over 8 hours post-treatment.

Countries

United States

Participant flow

Recruitment details

This study enrolled patients who were recently hospitalized with ADHF within 14 days of their discharge who were prescribed diuretic therapy at discharge.

Pre-assignment details

Enrollment was stratified by diuretic resistance based on the BAN-ADHF diuretic efficiency score with score ≥ 12 indicating diuretic resistance. The BAN-ADHF score was calculated using clinical parameters from the index admission.

Participants by arm

ArmCount
Oral Furosemide - With Diuretic Resistance
This group received oral furosemide and had diuretic resistance
23
Oral Furosemide - Without Diuretic Resistance
This group received oral furosemide and was without diuretic resistance
12
Subcutaneous Furosemide - With Diuretic Resistance
This group received subcutaneous furosemide and had diuretic resistance
23
Subcutaneous Furosemide - Without Diuretic Resistance
This group received subcutaneous furosemide and was without diuretic resistance
12
Total70

Baseline characteristics

CharacteristicOral Furosemide - With Diuretic ResistanceOral Furosemide - Without Diuretic ResistanceSubcutaneous Furosemide - With Diuretic ResistanceSubcutaneous Furosemide - Without Diuretic ResistanceTotal
Age, Continuous58.1 years
STANDARD_DEVIATION 6.9
55.4 years
STANDARD_DEVIATION 6.6
57.5 years
STANDARD_DEVIATION 9
56.0 years
STANDARD_DEVIATION 8.4
57.1 years
STANDARD_DEVIATION 7.8
BAN-ADHF Score14 units6 units14 units8.5 units13 units
Ethnicity (NIH/OMB)
Hispanic or Latino
3 Participants0 Participants3 Participants4 Participants10 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
20 Participants12 Participants20 Participants8 Participants60 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Sex: Female, Male
Female
5 Participants5 Participants5 Participants4 Participants19 Participants
Sex: Female, Male
Male
18 Participants7 Participants18 Participants8 Participants51 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
1 / 350 / 35
other
Total, other adverse events
6 / 353 / 35
serious
Total, serious adverse events
10 / 3513 / 35

Outcome results

Primary

Post-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.

Post-treatment diuretic efficiency is measured by cumulative urine output in mL per mg of treatment, observed hourly through 8 hours following the administration of study therapy (Furoscix vs. oral furosemide).

Time frame: 1 day

ArmMeasureValue (LEAST_SQUARES_MEAN)
≥ 12 BAN-ADHF, FuroscixPost-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.34.0 mL/mg
<= 11 BAN-ADHF, FuroscixPost-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.29.8 mL/mg
≥ 12 BAN-ADHF, ControlPost-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.22.6 mL/mg
<= 11 BAN-ADHF, ControlPost-treatment Urine Output as Measured by Cumulative Urine Output Within 1 Day.30.1 mL/mg
Secondary

Post-treatment Peak Spot Urine Sodium Levels in 1 Day

Post-treatment peak spot urine sodium levels assessed hourly over 8 hours post-treatment.

Time frame: 1 day

ArmMeasureValue (LEAST_SQUARES_MEAN)
≥ 12 BAN-ADHF, FuroscixPost-treatment Peak Spot Urine Sodium Levels in 1 Day100 mmol/L
<= 11 BAN-ADHF, FuroscixPost-treatment Peak Spot Urine Sodium Levels in 1 Day96 mmol/L
≥ 12 BAN-ADHF, ControlPost-treatment Peak Spot Urine Sodium Levels in 1 Day83 mmol/L
<= 11 BAN-ADHF, ControlPost-treatment Peak Spot Urine Sodium Levels in 1 Day95 mmol/L

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026