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The Efficacy of Oral Versus Intravenous Hypertonic Saline Administration in Runners With Exercise-Associated Hyponatremia

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified April 2010 by Western States Endurance Run Research Foundation.
Recruitment status was:  Recruiting
Information provided by:
Western States Endurance Run Research Foundation Identifier:
First received: April 23, 2010
Last updated: NA
Last verified: April 2010
History: No changes posted
The purpose of the study is to 1) evaluate incidence and primary cause of exercise-associated Hyponatremia (EAH) in race finishers participating in the Western States 100-mile Endurance Run, 2) determine if the ingestion of oral hypertonic saline (high salt) is as effective as intravenous administration of hypertonic saline to elevate below-normal blood salt concentrations (EAH) at the end of the Western States Endurance Run, and 3) determine if oral and intravenous hypertonic saline solutions are equally as effective at reversing mild (without altered mental status) symptoms associated with EAH.

Condition Intervention
Exercise-associated Hyponatremia Other: Intravenous hypertonic Saline Other: Oral hypertonic saline

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Incidence and Cause of Hyponatremia in Endurance Runners, Also to Determine if Oral Hypertonic Saline is as Efficacious as Intravenous Hypertonic Saline in the Correction of Below Normal Blood Sodium Concentrations in Runners With Hyponatremia Without Neurological Symptoms

Resource links provided by NLM:

Further study details as provided by Western States Endurance Run Research Foundation:

Primary Outcome Measures:
  • Blood sodium concentration post administration of oral or IV hypertonic saline. [ Time Frame: 1 hour post administration of hypertonic saline ]

Estimated Enrollment: 100
Study Start Date: June 2009
Estimated Study Completion Date: June 2010
Estimated Primary Completion Date: June 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Intravenous hypertonic saline Other: Intravenous hypertonic Saline
Intravenous 100mL bolus of 3% saline
Experimental: Oral hypertonic saline Other: Oral hypertonic saline
Oral 100mL bolus of 3% saline


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • consenting Western States 100 race finisher
  • hyponatremic

Exclusion Criteria:

  • altered mental status
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01110655

Contact: Martin D Hoffman, MD (916) 843-9027
Contact: Bethan E Owen, BM

United States, California
Western States Endurance Run Recruiting
Sacramento, California, United States, 95835
Contact: Martin D Hofman, MD    916-843-9027   
Contact: Bethan E Owen, BM   
Principal Investigator: Tamara Hew-Butler, DPM, PhD         
Sponsors and Collaborators
Western States Endurance Run Research Foundation
Study Chair: Martin D Hoffman, MD Western States Endurance Run Foundation
  More Information

Responsible Party: Martin D. Hoffman, MD, Western States Endurance Run Identifier: NCT01110655     History of Changes
Other Study ID Numbers: WSER 2009
Study First Received: April 23, 2010
Last Updated: April 23, 2010

Keywords provided by Western States Endurance Run Research Foundation:
Exercise-associated hyponatremia
Randomized treatment trial
Endurance runners

Additional relevant MeSH terms:
Water-Electrolyte Imbalance
Metabolic Diseases processed this record on September 21, 2017