Sodium-Restricted Diet and Diuretic in the Treatment of Severe Sleep Apnea (DESALT)

This study is currently recruiting participants. (see Contacts and Locations)
Verified June 2014 by Hospital de Clinicas de Porto Alegre
Information provided by (Responsible Party):
Hospital de Clinicas de Porto Alegre Identifier:
First received: September 16, 2013
Last updated: June 10, 2014
Last verified: June 2014

Compare the effect of a sodium-restricted diet to the diuretic in patients with severe obstructive sleep apnea.

Condition Intervention Phase
Obstructive Sleep Apnea
Drug: Lasilactone
Other: Sodium-Restricted Diet
Drug: Placebo pill
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: The Effect of Sodium-Restricted Diet and Diuretic in the Severe Sleep Apnea: a Randomized Controlled Trial - DESALT Study

Resource links provided by NLM:

Further study details as provided by Hospital de Clinicas de Porto Alegre:

Primary Outcome Measures:
  • Apnea-Hypopnea Index [ Time Frame: One week ] [ Designated as safety issue: No ]
    Number of apneas/hour

Secondary Outcome Measures:
  • Somnolence scale (Epworth) and ventilatory parameters [ Time Frame: One week ] [ Designated as safety issue: No ]
  • Glycolipid profile [ Time Frame: One week ] [ Designated as safety issue: No ]
    Total and HDL Cholesterol, Triglycerides, and glucose

  • Aldosterone Renin Level Activity [ Time Frame: One week ] [ Designated as safety issue: No ]
    Serum renin and aldosterone

  • Dosages of urinary 24h [ Time Frame: One week ] [ Designated as safety issue: No ]
    Aldosterone, sodium, potassium, urea, and creatinine

  • Inflammatory marker [ Time Frame: One week ] [ Designated as safety issue: No ]
    C reactive protein

Estimated Enrollment: 54
Study Start Date: October 2013
Estimated Study Completion Date: September 2014
Estimated Primary Completion Date: July 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Lasilactone
Dosage form: One capsule taking in the morning Dosage: furosemide, 20mg, and spironolactone, 100 mg. Frequency and duration: One capsule daily for 7 days.
Drug: Lasilactone
Placebo Comparator: placebo pill
One capsule taking in the morning. Frequency and duration: One capsule daily for 7 days.
Drug: Placebo pill
Active Comparator: Sodium-Restricted Diet
The diet group will receive a regimen with a prescribed intake of three grams of sodium per day
Other: Sodium-Restricted Diet


Ages Eligible for Study:   18 Years to 60 Years
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Men in the age range from 18 to 60 years;
  • Full-night in-laboratory polysomnography with apnea-hypopnea index > 30/h in the last three months;
  • Body mass index < 35 kg/m2;
  • Informed consent.

Exclusion Criteria:

  • Already having started any treatment for sleep apnea, including use of continuous positive airway pressure;
  • NYHA heart failure, any class.
  • Predominantly central apnea;
  • Peripheral venous or lymphatic insufficiency;
  • Any chronic renal disease;
  • Use of diuretics and substances with action in the central or peripheral nervous system such as benzodiazepines, hypnotics, anticonvulsants, antidepressants, appetite suppressants, amphetamines, antiparkinson agents, muscle relaxants, bronchodilators;
  • Stroke within 6 months or with incapacitating sequelae;
  • Any physical, mental or social condition impairing the ability to participate in the trial.
  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: NCT01945801

Contact: Cintia Fiori, MSc 555133598289

Hospital de Clinicas de Porto Alegre Recruiting
Porto Alegre, RS, Brazil, 90035-903
Contact: Cintia Zappe Fiori, MSc    555133598289   
Principal Investigator: Cintia Z Fiori, MSc         
Sponsors and Collaborators
Hospital de Clinicas de Porto Alegre
Study Chair: Denis Martinez, MD, PhD Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul
Principal Investigator: Cintia Fiori, MSc Federal University of Rio Grande do Sul
  More Information

No publications provided

Responsible Party: Hospital de Clinicas de Porto Alegre Identifier: NCT01945801     History of Changes
Other Study ID Numbers: GPPG-13-0272, 13-0272
Study First Received: September 16, 2013
Last Updated: June 10, 2014
Health Authority: Brazil: Ethics Committee

Keywords provided by Hospital de Clinicas de Porto Alegre:
Sleep apnea
Sodium-Restricted Diet

Additional relevant MeSH terms:
Sleep Apnea Syndromes
Sleep Apnea, Obstructive
Nervous System Diseases
Respiration Disorders
Respiratory Tract Diseases
Signs and Symptoms
Signs and Symptoms, Respiratory
Sleep Disorders
Sleep Disorders, Intrinsic
Natriuretic Agents
Pharmacologic Actions
Physiological Effects of Drugs processed this record on October 23, 2014