This trial is active, not recruiting.

Conditions chronic kidney disease, obstructive sleep apnea
Treatment cpap - continuous airway pressure
Sponsor Erling Bjerregaard Pedersen
Start date December 2013
End date October 2017
Trial size 30 participants
Trial identifier NCT01951248, BGH-3-2013, M-2013-285-13


The purpose of this study is to investigate the effect of 3 months of continuous positive airway pressure (CPAP) treatment of obstructive sleep apnea (OSA) in moderate to severe cases in patients with chronic kidney disease. The effect is evaluated on blood pressure levels, particularly nocturnal blood pressure, both central and peripheral, and renal function, including the kidneys treatment of salt and water.


1. Central 24-h blood pressure measuring is a reveals fluctuations in blood pressure during the day more accurately than peripheral 24-h blood pressure measuring because the measurement is painless and does not interfere with the patient activities during the daytime or nighttime sleep.

2. Central blood pressure is elevated in patients with OSA and falls during treatment with CPAP.

3. The renal tubular function relating to the treatment of water and sodium is abnormal in patients with OSA with increased tubular absorption of water via the U-aquaporin 2 (u-AQP2) and of sodium by epithelial sodium channel (ENAC) and is normalized during treatment with CPAP.

4 Quality of life is improved during treatment with CPAP.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Intervention model single group assignment
Masking open label
Primary purpose treatment
Patients with chronic kidney disease and moderate to severe obstructive sleep apnea is treated 3 months with CPAP treatment
cpap - continuous airway pressure S9 AutoSet from ResMed/Maribo Medico
3 months of treatment with CPAP treatment

Primary Outcomes

decrease in systolic night time blood pressure
time frame: 3 months

Secondary Outcomes

difference in systolic blood pressure at night by central blood pressure monitoring
time frame: 3 months
systolic and diastolic blood pressure throughout the day
time frame: 3 months
correlation between blood pressure, OSA and kidney function
time frame: 3 months
U-AQP2 and u-ENaCɣ in day urine. PRC, p-AngII, p-Aldo. P-AVP and p-endothelial.
time frame: 3 months
quality af life
time frame: 3 months

Eligibility Criteria

Male or female participants from 18 years up to 80 years old.

Inclusion Criteria: - renal insufficiency (CKD stage III + IV), estimated glomerular filtration rate (eGFR) 15-59 ml/min/1.73 m2 - Obstructive sleep apnea, AHI> 15 (moderate to severe) - both men and women - 18-80 years Exclusion Criteria: - lack of desire to participate - malignant disease - Abuse of drugs or alcohol - pregnant and lactating - incompensated heart failure - atrial fibrillation - liver disease (alanine aminotransferase> 200) - Severe chronic obstructive lung disease (Forced expiratory volume in 1 second <50% predicted)

Additional Information

Official title Central and Peripheral 24-h Blood Pressure Measurements in Patients With Chronic Renal Failure and Obstructive Sleep Apnea Before and After Treatment With CPAP
Description Approximately 30 patients with chronic kidney disease and obstructive sleep apnea in moderate to severe degree is examined with central and peripheral 24-h blood pressure monitoring, 1 night home polygraphy to determine the degree of sleep apnea, blood and urine samples to determine levels of u-AQP2, u-ENAC, plasma renin concentration (PRC), s-angiotensin II (p-angII), p-aldosterone, p-vasopressin (p-avp) and p-endothelin, before the start treatment with CPAP for sleep apnea. After 3 month of treatment all the above described is repeated to determine effects of CPAP treatment on blood pressure levels during the day, changes i apnea hypopnea index (AHI) and the kidneys treatment of salt and water.
Trial information was received from ClinicalTrials.gov and was last updated in October 2014.
Information provided to ClinicalTrials.gov by Regional Hospital Holstebro.