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Bioimpedance Spectroscopy for the Differential Diagnosis of Hyponatremia

This study has been completed.
Information provided by (Responsible Party):
Ender Hur, Zonguldak Karaelmas University Identifier:
First received: April 20, 2013
Last updated: October 30, 2014
Last verified: October 2014
We aimed to investigate the role of bioimpedance spectroscopy for the diagnosis of hyponatremia


Study Type: Observational [Patient Registry]
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Target Follow-Up Duration: 6 Months
Official Title: Bioimpedance Spectroscopy for the Differential Diagnosis of Hyponatremia

Further study details as provided by Ender Hur, Zonguldak Karaelmas University:

Primary Outcome Measures:
  • Accuracy of volume status measured by bioimpedance spectroscopy [ Time Frame: Six months ]


    Overhydration (OH) measurement by Body Composition Monitor (Fresenius Medical Care)

    Negative values of "OH" indicating Hypovolemia and positive values for hypervolemia in hyponatremic patients.

Secondary Outcome Measures:
  • Laboratory data and echocardiography [ Time Frame: 6 Months ]

    LABORATORY MEASUREMENTS Hemoglobin, Hematocrit, White blood cell count Platelet count, Na, Potassium, Chlorur, Urea, Creatinine, Uric acid, Plasma osmolality, Urine osmolality, Alanine transaminase , Aspartate transaminase , Urine specific gravity,


    1. Diuretics
    2. Intravenous hydration by isotonic saline


    Left ventricular end-diastolic diameter, Left ventricular end-systolic diameter, Ejection fraction(%), Left Atrium diameter, Aortic diameter, Right atrium diameter, Interventricular septum, Posterior wall thickness, Mitral insufficiency, Pulmonary insufficiency, Systolic pulmonary artery pressure, Tricuspid insufficiency

Enrollment: 58
Study Start Date: February 2013
Study Completion Date: September 2013
Primary Completion Date: August 2013 (Final data collection date for primary outcome measure)
Hypovolemic hyponatremia
Negative values of "Overhydration" measured by Bioimpedance spectroscopy
Hypervolemic hyponatremia
Positive values of "Overhydration" measured by Bioimpedance spectroscopy

Detailed Description:
  • Up to now, "Hyponatremia" differentially diagnosed by physical examination, plasma and urine osmolalities, Echocardiography and biochemical measurements.
  • The purpose of this study is to determine whether bioimpedance spectroscopy can be used for the detection of hypovolemia and hypervolemia for the differential diagnosis of hyponatremia.

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Patients admitted to Bulent Ecevit University Hospital with the presentation of hyponatremia

Inclusion Criteria:

  • Willing to participate in the study with written informed consent
  • Older than 18-years

Exclusion Criteria:

  • The presence of pacemaker or defibrillator
  • Artificial joints, pin or amputation
  • Pregnancy or lactating.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01838759

Bulent Ecevit University Hospital
Zonguldak, Turkey, 67300
Sponsors and Collaborators
Zonguldak Karaelmas University
Study Chair: Ender Hur, Assoc.Prof. Bulent Ecevit University Medical School, Division of Nephrology, Zonguldak, Turkey
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Ender Hur, Associate Professor Doctor, Zonguldak Karaelmas University Identifier: NCT01838759     History of Changes
Other Study ID Numbers: BEUN 2013-31-26/02
Study First Received: April 20, 2013
Last Updated: October 30, 2014

Keywords provided by Ender Hur, Zonguldak Karaelmas University:
Bioimpedance spectroscopy

Additional relevant MeSH terms:
Water-Electrolyte Imbalance
Metabolic Diseases processed this record on August 22, 2017