Sleep Apnea, Obstructive Clinical Trial
Official title:
CPAP Effect in Nocturnal Blood Pressure in Normotensive Patients With Dipper Circadian Pattern and Severe Obstructive Sleep Apnea (OSA)
NCT number | NCT03948373 |
Other study ID # | Dipper-OSA |
Secondary ID | |
Status | Recruiting |
Phase | N/A |
First received | |
Last updated | |
Start date | May 7, 2019 |
Est. completion date | December 2025 |
The principal objective is to evaluate the effect of CPAP treatment on blood pressure (BP) in normotensive patients with dipper circadian pattern with sleep apnea-hypopnea syndrome (SAHS). The secondary objectives are: i) To evaluate the prevalence of the different circadian patterns of BP in ambulatory blood pressure monitoring (ABPM) ii) To establish the relationship between CPAP compliance and BP response; iii) Identify which ABPM variables and biomarkers are related to BP response; iv) Evaluate changes in the biomarkers' profile with the CPAP treatment. Methodology: Open-label, parallel, prospective, randomized and controlled trial including normotensive patients diagnosed with severe SAHS without significant somnolence. 64 patients with dipper circadian pattern will be included and will be randomized to receive CPAP (32) or conservative treatment (32). ABPM and blood sample collection will be performed at the beginning of the study and at 3 months.
Status | Recruiting |
Enrollment | 64 |
Est. completion date | December 2025 |
Est. primary completion date | December 2025 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years to 100 Years |
Eligibility | Inclusion Criteria: 1. Men and women over 18 years of age 2. Referred to the sleep unit for suspected OSA 3. Being normotensive and presenting an AHI = 30 in the sleep study 4. Signature of the informed consent. Exclusion Criteria: 1. Previous CPAP treatment 2. Significant somnolence defined by an Epworth Sleepiness Scale (ESS) score higher than 18 3. Psychophysical inability to complete questionnaires 4. Previous diagnosis or suspicion of another sleep disorder 5. Presence of more than 50% of central apneas or Cheyne-Stokes respiration 6. Having a serious chronic disease: neoplasia, renal failure, severe chronic obstructive pulmonary disease, chronic depression and other chronic limiting diseases 7. Medical history that may interfere with the objectives of the study or, in the opinion of the researcher, may compromise the conclusions 8. Any medical, social or geographical factor that may endanger the patient's compliance 9-Having a profession of high risk (professional driver). |
Country | Name | City | State |
---|---|---|---|
Spain | Hospital Arnau de Vilanova-Santa Maria | Lleida |
Lead Sponsor | Collaborator |
---|---|
Sociedad Española de Neumología y Cirugía Torácica | Societat Catalana de Pneumologia |
Spain,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Effect of CPAP treatment on BP according to the circadian BP pattern in normotensive dipper patients with severe OSA | Change in mmHg in the blood pressure of the ambulatory blood pressure monitoring parameters after the treatment | 3 years | |
Secondary | Prevalence of the different circadian BP patterns (dipper/no-dipper) in the ABPM of normotensive subjects diagnosed with severe OSA without significant somnolence (Epworth=18) | The prevalence of each circadian patterns will be calculated from the baseline ambulatory blood pressure monitoring data | 3 years | |
Secondary | Relationship between compliance with CPAP treatment and the blood pressure change in these patients | The relation between CPAP compliance (mean hours per night) and change in mean nighttime BP using multivariate models in patients randomized to CPAP treatment. | 3 years | |
Secondary | Ambulatory blood pressure parameters different to circadian blood pressure that are related to the response to CPAP treatment | Using all the ABPM variables we will proceed to the identification of variables that are related to the change in mean nocturnal BP in patients treated with CPAP. | 3 years | |
Secondary | Changes in the biomarkers' profile after CPAP treatment | Using the the blood samples obtained in the baseline and 3 months visit it will be evaluated possible changes in the biomarkers profile after CPAP treatment.
Learning Phase: complete profile analysis (754 miRNAs) will be carried out in 24 patients Learning Phase: complete profile analysis (754 miRNAs) will be carried out in 24 patients representative of the change in BP in treated patients. The miRNAs associated with the change in BP will be identified from the 754 miRNAs potentially present in serum and plasma. Validation Phase: Specific primers will be designed for the real-time PCR amplification of the genes for which we have found a significant association The miRNAs found will be analyzed after 3 months of treatment. Analysis of biomarkers. Immunoassay techniques will evaluate the following markers before and after treatment: angiotensin I, II and III, plasma renin activity, atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) and endogenous ouabain. |
3 years |
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