Potassium Containing Salt-Substitute in Hemodialysis-Dependent End Stage Kidney Disease

NCT ID: NCT05558267

Last Updated: 2025-04-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-08-15

Study Completion Date

2026-03-30

Brief Summary

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16 individuals with hemodialysis-dependent end stage kidney disease will receive 16 days of a potassium-containing salt-substitute and 16 days of standard table salt in random order. There will be a 19 day wash out period between the salt-substitute and table salt periods. Potassium concentration will be measured bi-weekly prior to HD each week during intervention. The primary endpoint will be the change in potassium from baseline. Additional measurements will include assessment of dietary intake, ambulatory blood pressure, occurrence of peri-dialytic symptoms, and per-dialytic vital signs.

Detailed Description

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Conditions

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End Stage Kidney Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

PREVENTION

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Standard Table Salt, then Salt Substitute

The two intervention periods will last 16 days with a 19-day washout period in between.

During the first 16-day treatment period, participants will receive the Standard Table Salt to use for cooking and as an additive at the table. Participants will then undergo a 19-day washout period. The second 16-day treatment period will immediately follow the washout period. During the second 16-day treatment period, participants will receive the Salt Substitute to use for cooking and as an additive at the table.

Participants will be encouraged to replace their use of regular salt with the Standard Table Salt and Salt Substitute. They will be encouraged to reduce their overall intake of salt throughout the study period. There are no restrictions or further instructions regarding timing or dosing.

In addition, participants will undergo standard of care hemodialysis (typically 3x/week) and have their blood chemistries measured according to the usual standard of care during the study.

Group Type EXPERIMENTAL

Standard Table Salt

Intervention Type DIETARY_SUPPLEMENT

Standard Table Salt is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Salt Substitute

Intervention Type DIETARY_SUPPLEMENT

Salt Substitute is available as a crystalized powder. It substitutes potassium chloride for sodium chloride, and thus contains about 50% less sodium than standard table salt.

Salt Substitute is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Salt Substitute, then Standard Table Salt

The two intervention periods will last 16 days with a 19-day washout period in between.

During the first 16-day treatment period, participants will receive the Salt Substitute to use for cooking and as an additive at the table. Participants will then undergo a 19-day washout period. The second 16-day treatment period will immediately follow the washout period. During the second 16-day treatment period, participants will receive the Standard Table Salt to use for cooking and as an additive at the table.

Participants will be encouraged to replace their use of regular salt with the Standard Table Salt and Salt Substitute. They will be encouraged to reduce their overall intake of salt throughout the study period. There are no restrictions or further instructions regarding timing or dosing.

In addition, participants will undergo standard of care hemodialysis (typically 3x/week) and have their blood chemistries measured according to the usual standard of care during the study.

Group Type EXPERIMENTAL

Standard Table Salt

Intervention Type DIETARY_SUPPLEMENT

Standard Table Salt is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Salt Substitute

Intervention Type DIETARY_SUPPLEMENT

Salt Substitute is available as a crystalized powder. It substitutes potassium chloride for sodium chloride, and thus contains about 50% less sodium than standard table salt.

Salt Substitute is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Interventions

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Standard Table Salt

Standard Table Salt is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Intervention Type DIETARY_SUPPLEMENT

Salt Substitute

Salt Substitute is available as a crystalized powder. It substitutes potassium chloride for sodium chloride, and thus contains about 50% less sodium than standard table salt.

Salt Substitute is administered orally. It is transferred to unmarked saltshakers by non-blinded research coordinators. The unmarked saltshaker is delivered to the participant during dialysis.

Intervention Type DIETARY_SUPPLEMENT

Other Intervention Names

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Morton Standard Table Salt Morton Lite Salt

Eligibility Criteria

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Inclusion Criteria

1. Receiving outpatient maintenance HD therapy.
2. Age ≥ 21 years.
3. Negative serum pregnancy test for women of child-bearing capacity. Childbearing capacity will be defined by report of menstruation within ≤ 6 months.

Exclusion Criteria

1. Currently incarcerated.
2. Insufficient capacity for informed consent.
3. Non-hemolyzed serum potassium concentration \>6.0 mEq/L within ≤30 days.
4. Unscheduled HD for hyperkalemia within ≤30 days.
5. Attendance at ≤10 of last 13 scheduled OP HD sessions.
6. Co-habiting family member with known hyperkalemia.
7. Co-habiting family with ≥stage 3b chronic kidney disease or chronic kidney disease of unknown severity.
8. Hemoglobin \< 8.0 mg/dL.
9. Use of other potassium supplements.
Minimum Eligible Age

21 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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NYU Langone Health

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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David Charytan, MD MSc

Role: PRINCIPAL_INVESTIGATOR

NYU Langone Medical Center

Locations

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NYU Langone Health

New York, New York, United States

Site Status

Countries

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United States

Central Contacts

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David Charytan, MD MSc

Role: CONTACT

617-935-1572

Zoe Rimler

Role: CONTACT

631-357-1333

Other Identifiers

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22-00769

Identifier Type: -

Identifier Source: org_study_id

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