Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: CPAP Treatment : Fixed Versus Auto-adjusting Mode Impact on Clinical Blood Arterial Pressure. Randomised, Controlled and Double Blinded Trial in SAOS Patients
Brief Summary: Background: Continuous positive airway pressure (CPAP) is the first line therapy for obstructive sleep apnea syndrome (OSAS). Two positive airway pressure (PAP) modalities can be used: Fixed pressure, in which the effective pressure is set and kept constant all night, and auto CPAP devices where the positive pressure changes during the night depend on patient's requirements.

Hypothesis: Pressure variations associated with autoCPAP functioning can lead to sleep fragmentation and alterations in sleep structure. This can limit blood pressure dipping during sleep and then impact clinical blood pressure reduction.

Main objective: To compare in a randomized controlled trial 4 months clinical blood pressure (BP) evolution depending on CPAP mode: fixed pressure versus autoCPAP. Secondary outcomes: Evolution of arterial stiffness, biological parameters, quality of life and symptoms.

Methods: Patients will be randomised depending on CPAP mode. Baseline and 4 months evaluation will include: 24-h ambulatory blood pressure monitoring, clinical BP measurements and carotid-to-femoral pulse wave velocity (PWV). Patients will also complete quality of life and symptoms questionnaires.

2 interim analysis will be carried out when 150 and 220 patients respectively will have completed the study. The Peto's method will be used to correct the p-values.


Options:
A: Arm Label: Nexus (S9) CPAP device; Type: EXPERIMENTAL; Interventions: Device: CPAP Pre Nexus (S9), Device: Nexus (S9), Device: CPAP Post Nexus (S9) | Intervention Type: DEVICE; Name: CPAP Pre Nexus (S9); Assigned to Arm(s): Nexus (S9) CPAP device | Intervention Type: DEVICE; Name: Nexus (S9); Assigned to Arm(s): Nexus (S9) CPAP device | Intervention Type: DEVICE; Name: CPAP Post Nexus (S9); Assigned to Arm(s): Nexus (S9) CPAP device
B: Arm Label: Fixed pressure; Type: ACTIVE_COMPARATOR; Interventions: Device: S8 Spirit 2, Device: Somnosmart 2, Device: Remstar Auto | Arm Label: Auto-adjusting pressure; Type: ACTIVE_COMPARATOR; Interventions: Device: S8 Spirit 2, Device: Somnosmart 2, Device: Remstar Auto | Intervention Type: DEVICE; Name: S8 Spirit 2; Assigned to Arm(s): Auto-adjusting pressure, Fixed pressure | Intervention Type: DEVICE; Name: Somnosmart 2; Assigned to Arm(s): Auto-adjusting pressure, Fixed pressure | Intervention Type: DEVICE; Name: Remstar Auto; Assigned to Arm(s): Auto-adjusting pressure, Fixed pressure
C: Arm Label: 1; Type: ACTIVE_COMPARATOR; Interventions: Device: constant CPAP devices | Arm Label: 2; Type: EXPERIMENTAL; Interventions: Device: automatic CPAP devices | Intervention Type: DEVICE; Name: constant CPAP devices; Assigned to Arm(s): 1 | Intervention Type: DEVICE; Name: automatic CPAP devices; Assigned to Arm(s): 2
D: Arm Label: 1; Type: ACTIVE_COMPARATOR; Interventions: Device: life style modification, noninvasive ventilation, CPAP | Arm Label: 2; Type: ACTIVE_COMPARATOR; Interventions: Device: life style modification, noninvasive ventilation, CPAP | Arm Label: 3; Type: ACTIVE_COMPARATOR; Interventions: Device: life style modification, noninvasive ventilation, CPAP | Arm Label: 4; Type: ACTIVE_COMPARATOR; Interventions: Device: life style modification, noninvasive ventilation, CPAP | Arm Label: 5; Type: ACTIVE_COMPARATOR; Interventions: Device: life style modification, noninvasive ventilation, CPAP | Intervention Type: DEVICE; Name: life style modification, noninvasive ventilation, CPAP; Assigned to Arm(s): 1, 2, 3, 4, 5

Answer: B