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CompletedNCT07765459Updated Aug 14, 2026

the Effect of Interdialytic Serum Bicarbonate Correction on Vascular Calcification in Hemodialysis Patients

A Phase 1 interventional study of Oral sodium bicarbonate in End Stage Renal Disease (ESRD) and Metabolic Acidosis, sponsored by Ain Shams University. Completed at 1 site in Egypt. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-14.

Sponsored by Ain Shams University · Phase 1, Interventional, and Other

From the registry’s dates

  • Registered 1 year 9 months after the study started (first participant enrolled Sep 2023, registered Jun 2025).
Phase
Phase 1
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

the investigators will test the effect of interdialytic metabolic acidosis correction on vascular calcification in hemodialysis patients

Read the detailed description
  • Type of Study: Prospective randomized interventional study using simple randomization ( even and odd number method )
  • Study Settings: Ain Shams University hospital hemodialysis unit , Cairo, Egypt.
  • Study period: 6 months.

Inclusion Criteria:

  • Adult prevalent hemodialysis patients on regular hemodialysis more than 6 months , three sessions per week of four hours duration
  • Patients with metabolic acidosis at the time they were recruited with serum bicarbonate levels ≤22 mmol/l for at least 6 months before the study.

Exclusion Criteria: patients with the following will be excluded from the study

  • Patients with hemodialysis catheters
  • Patients with active inflammation , infection or active malignancy
  • Patients with history of parathyroidectomy
  • Patients with other organ failure such as decompensated heart failure or liver cell failure

    • Study Population: Adult patients on regular hemodialysis with metabolic acidosis at the time they were recruited with serum bicarbonate levels ≤22 mmol/l for at least 6 months before the study.
    • Sample size: 20 ESRD patients who had been on regular hemodialysis with serum bicarbonate levels ≤22 for at least 6 months

      20 ESRD patients on regular hemodialysis with serum bicarbonate levels ≤22 for at least 6 months as control matched in age and sex

all patients will be subjected to the following:

  1. Full history taking.
  2. General and local examination. C-Laboratory investigations . The following parameters will be assessed before and after correction of acidosis: total serum calcium, serum albumin , plasma phosphate, iPTH, serum bicarbonate concentration, hemoglobin,. parameters will be drawn at the start of the dialysis session after the long dialysis interval Patients will be studied both before (pre) and at the end of (post) 6 months of correction of their metabolic acidosis by oral supplementation with sodium bicarbonate mean dose 1-3 g/day . Serum bicarbonate levels during correction will be maintained between 22 and 28 mmol/l . serum bicarbonate level will be withdrawn monthly and if the patients Hco3 during the monthly follow up exceeds 28 mmol/l , the dose of sodium bicarbonate will be withheld and we will follow up the serum bicarbonate level one month later .

Imaging : carotid artery duplex will be done to all patients at the start of the study and at the end

Imaging : carotid artery duplex will be done to all patients at the start of the study and at the end

02

Conditions studied

  • End Stage Renal Disease (ESRD)
  • Metabolic Acidosis
03

In context

Kidney Failure, Chronic

2,108 studies on the registry are indexed under Kidney Failure, Chronic; 273 are open to participants now.

This study's enrollment of 40 is below the median of 57 across 1,569 interventional studies indexed under Kidney Failure, Chronic.

Browse Kidney Failure, Chronic studies →

Lead sponsor

Ain Shams University is the lead sponsor of 1,950 studies on the registry; 429 are open to participants now.

Of its 35 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Adult prevalent hemodialysis patients (age 18 years or older) On regular hemodialysis for more than 6 months, with three sessions per week, each lasting four hours Metabolic acidosis at the time of recruitment, defined as a serum bicarbonate level ≤22 mmol/L for at least 6 months before the study

Exclusion criteria

Exclusion Criteria:

Patients with hemodialysis catheters Active inflammation, infection, or active History of parathyroidectomy Other organ failure, such as decompensated heart failure or liver failure

Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

05

Study design

Phase
Phase 1
Primary purpose
Other
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • Active comparator
    oral sodium bicarbonate

    this group will receive oral sodium bicabonate daily

    Drug: Oral sodium bicarbonate

  • No intervention
    no intervention : control group

    participants in this arm will receive standard care without bicarbonate supplementation : they will serve as the control group for comparison

Interventions

06

What researchers measure

Primary outcomes

  1. correction of acidosis and its effect on vascular calcification

    change in carotid intimal media thickness (CIMT ) , measured by B mode ultrasound of the common carotid artery , the unit is millimeters

    Time frame: 6 months

Secondary outcomes

  1. Change in Serum Calcium Level

    Serum calcium will be measured from blood samples at baseline and at the end of the study. The change in serum calcium level from baseline to the end of the study will be assessed.Unit of Measure: mg/dL

    Time frame: 6 months

  2. Change in Serum Phosphorus Level

    Serum phosphorus will be measured from blood samples at baseline and at the end of the study. The change in serum phosphorus level from baseline to the end of the study will be assessed. Unit of Measure: mg/dL

    Time frame: 6 months

  3. Change in Intact Parathyroid Hormone (iPTH) Level

    Serum intact parathyroid hormone (iPTH) will be measured from blood samples at baseline and at the end of the study. The change in iPTH level from baseline to the end of the study will be assessed. Unit of Measure: pg/mL

    Time frame: 6 months

  4. Change in Hemoglobin Concentration

    Hemoglobin concentration will be measured from blood samples at baseline and at the end of the study. The change in hemoglobin concentration from baseline to the end of the study will be assessed . Unit of Measure: g/dL

    Time frame: 6 months

  5. Change in Serum Albumin Level

    Serum albumin will be measured from blood samples at baseline and at the end of the study. The change in serum albumin level from baseline to the end of the study will be assessed.

    Time frame: Unit of Measure: g/dL

  6. Change in Venous Blood pH

    Venous blood pH will be measured at baseline and at the end of the study. The change in venous blood pH from baseline to the end of the study will be assessed. Unit of Measure: pH units

    Time frame: 6 months

  7. Change in Serum Bicarbonate Level

    Serum bicarbonate will be measured from blood samples at baseline and at the end of the study. The change in serum bicarbonate level from baseline to the end of the study will be assessed. Unit of Measure: mmol/L

    Time frame: 6 months

07

Study locations

1 site
  • Ainshams university
    Cairo, Egypt 11111, Egypt
08

References and documents

Individual participant data

Plan to share: Yes

Supporting information: Study protocol, Statistical analysis plan, Informed consent form

Access criteria: free

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 14, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07765459
Responsible party
Sponsor
First posted
Aug 14, 2026
Start date
Sep 1, 2023
Primary completion
Feb 29, 2024
Completion
Feb 29, 2024
Last update
Aug 14, 2026

Study contacts

Abubakr mohamed fahmy, assistant lecturer
principal investigator · Ain Shams University

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Sodium Bicarbonate

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