Domiciliary Diagnosis and Follow up in Obstructive Apnoea Syndrome

2014-07-23 21:12:18 | BioPortfolio


The aim of the investigators study was to evaluate the effectiveness of a home programme (diagnosis and follow-up) in patients with Obstructive Sleep Apnea (OSA) syndrome treated with CPAP and to analyze the cost of this approach.


The aim of our study was to evaluate the effectiveness of a home programme (diagnosis and follow-up) in patients with Obstructive Sleep Apnea (OSA) syndrome treated with CPAP and to analyze the cost of this approach.

Detailed Description: We conducted a prospective comparative study. Patients referred for suspected OSAS were evaluated. In the first visit patients completed four questionnaires: Epworth sleepiness scale, Impact Functional Illness Questionnaire (FOSQ), activity questionnaire and symptom questionnaire.

Patients were randomised to three groups:

- Group A (domiciliary group): home based diagnosis by home respiratory polygraphy (RP) and home review conducted by a specialist nurse

- Group B (Hospital group): hospital based diagnosis by polysomnography (PSG) and clinical review conducted by a Pulmonologist

- Group C (mixed group): home based diagnosis by home respiratory polygraphy (RP) and clinical review conducted by a Pulmonologist

Following the diagnostic test (PSG or RP), patients were visited by the Pulmonologist, who identified the need for CPAP treatment.

Patients were evaluated after 1,3 and 6 months of CPAP treatment. In all follow-up visits compliance was evaluated by objective methods and questionnaires described above were filled in.

In domiciliary group, phone calls or hospital appointments were made if low compliance was detected or if some problem with treatment was detected.


- Conventional PSG was performed in hospital supervised by a trained nurse. PSG used for the study was Somnostar alfa®. Parameters obtained were: electroencephalogram (C3-A2, C4-A1), electrooculogram electromyogram, electrocardiogram (V2 modified), respiratory effort by thoracic and abdominal resistance bands, air flow with nasal cannula pressure connected to a transducer, oxygen saturation with a pulseoximeter, and snoring with a selective microphone. PSG was manually interpreted in 30 seconds epochs, according to Rechschaffen and Kales criteria.The apnea-hypopnea index (AHI) was defined as the number of apneas-hypopneas divided by the number of hours of sleep. OSA diagnosis was done if AHI was >10 /h.

- Respiratory polygraphy was performed in a non-attended way in patient's home. The nurse who monitorized the patient in the home setting, instructed the patient on the proper use of the RP. A validated respiratory polygraphy system corresponding to ASDA level III (Stardust®) was used. The parameters monitorized were: nasal flow, chest movement, oxyhemoglobin saturation, pulse and body position. The same cardio-respiratory variables that we identified in PSG, were registered. An event rate (number of apneas + number of hypopnea divided by the number of hours recorded)> 15 was considered as a diagnosis. The study were recorded by computer system and manually interpreted by a physician. In case of invalid registration we performed a second PR. If in doubt after the second study a PSG was performed.

Follow-up visits and assessment of compliance:

- Hospital monitoring group: Effective compliance was calculated by mean of the CPAP hour meter, dividing the total number of hours timer by the number of days of use. We discounted 10% of the time, which is the average time of ineffective pressure. Patients were considered adherent if they use CPAP at least 4 hours during 70% of the week

- Follow-up visits by nurses: This group of patients was treated at home through a system of fixed pressure CPAP (REMstar Pro, Respironics ®), with a memory card which can store information about the number of hours of effective pressure. It also allows to know the number of days of CPAP use. In all visits the nurse collect the memory card for later analysis, which was performed by a physician.The nurse responsible for the program evaluated the need of reinforcing in order to get an optimal compliance. If it was considered necessary, the patient was evaluated by the Pulmonologist either by mean of a phone call or of an hospital appointment. All patients in this group were contacted by phone at least once during the first month of CPAP treatment

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Supportive Care


Obstructive Sleep Apnea


Diagnosis and monitoring of OSA patients


Hospital San Juan de Alicante
San Juan




Hospital Universitario San Juan de Alicante

Results (where available)

View Results


Published on BioPortfolio: 2014-07-23T21:12:18-0400

Clinical Trials [3090 Associated Clinical Trials listed on BioPortfolio]

Home Diagnosis and Treatment of Obstructive Sleep Apnea

Obstructive Sleep Apnea (OSA) is a common and underrecognised condition. The diagnosis of OSA is typically made after an in-lab polysomnography (PSG) which requires an overnight stay in a ...

Sleep Apnea : Diagnosis and Monitoring

This prospective study aims to evaluate a new medical screening method to detect and discriminate sleep apnea-hypopnea events. A new device called ApneaBand will be tested to propose a new...

Cardiovascular Variability and Heart Rate Response Associated With Obstructive Sleep Apnea

Obstructive sleep apnea is often associated with microarousals and a stimulation of the sympathetic nervous system. The knowledge of this autonomic activation may help understanding the in...

Diagnosis and Treatment of Sleep Apnea in Cerebrovascular Disease

Sleep apnea is common among veterans with cerebrovascular disease (stroke or transient ischemic attack [TIA]), leads to hypertension, and is associated with recurrent stroke and death. Alt...

Vasoactive Hormones and Oxygen Saturation During Apneic Events in Patients With Obstructive Sleep Apnea

The mechanisms involved in development and maintenance of hypertension in obstructive sleep apnea are not clarified. We hypothesize that patients with obstructive sleep apnea have an abno...

PubMed Articles [32862 Associated PubMed Articles listed on BioPortfolio]

Implication of mixed sleep apnea events in adult patients with obstructive sleep apnea-hypopnea syndrome.

Although mixed sleep apnea (MSA) is one of the three types of sleep apnea, it is not considered a separate disease entity. It is generally seen as a part of obstructive sleep apnea-hypopnea syndrome (...

Comparisons of measures used to screen for obstructive sleep apnea in patients referred to a sleep clinic.

Obstructive Sleep Apnea (OSA) contributes to all-cause mortality. An American Academy of Sleep Medicine task force is focusing on improving detection and categorization of OSA symptoms and severity to...

Diagnosis and perioperative management in pediatric sleep-disordered breathing.

Sleep-disordered breathing has a prevalence of 12% in the pediatric population. It represents a spectrum of disorders encompassing abnormalities of the upper airway that lead to sleep disruption, incl...

Preoperative Obstructive Sleep Apnea Screening in Gynecologic Oncology Patients.

Women with a gynecologic cancer tend to be older, obese, and postmenopausal, characteristics that are associated with an increased risk for obstructive sleep apnea. However, there is limited investiga...

Sleep and libido in men with obstructive sleep apnea syndrome.

The objectives of this study were to investigate the relationship between a low libido and objective sleep parameters as well as mood disturbances in patients with obstructive sleep apnea syndrome (OS...

Medical and Biotech [MESH] Definitions

A condition associated with multiple episodes of sleep apnea which are distinguished from obstructive sleep apnea (SLEEP APNEA, OBSTRUCTIVE) by the complete cessation of efforts to breathe. This disorder is associated with dysfunction of central nervous system centers that regulate respiration. This condition may be idiopathic (primary) or associated with lower brain stem lesions; chronic obstructive pulmonary disease (LUNG DISEASES, OBSTRUCTIVE); HEART FAILURE, CONGESTIVE; medication effect; and other conditions. Sleep maintenance is impaired, resulting in daytime hypersomnolence. Primary central sleep apnea is frequently associated with obstructive sleep apnea. When both forms are present the condition is referred to as mixed sleep apnea (see SLEEP APNEA SYNDROMES). (Adams et al., Principles of Neurology, 6th ed, p395; Neurol Clin 1996;14(3):611-28)

Disorders characterized by multiple cessations of respirations during sleep that induce partial arousals and interfere with the maintenance of sleep. Sleep apnea syndromes are divided into central (see SLEEP APNEA, CENTRAL), obstructive (see SLEEP APNEA, OBSTRUCTIVE), and mixed central-obstructive types.

Simultaneous and continuous monitoring of several parameters during sleep to study normal and abnormal sleep. The study includes monitoring of brain waves, to assess sleep stages, and other physiological variables such as breathing, eye movements, and blood oxygen levels which exhibit a disrupted pattern with sleep disturbances.

Dyssomnias (i.e., insomnias or hypersomnias) associated with dysfunction of internal sleep mechanisms or secondary to a sleep-related medical disorder (e.g., sleep apnea, post-traumatic sleep disorders, etc.). (From Thorpy, Sleep Disorders Medicine, 1994, p187)

A disorder characterized by recurrent apneas during sleep despite persistent respiratory efforts. It is due to upper airway obstruction. The respiratory pauses may induce HYPERCAPNIA or HYPOXIA. Cardiac arrhythmias and elevation of systemic and pulmonary arterial pressures may occur. Frequent partial arousals occur throughout sleep, resulting in relative SLEEP DEPRIVATION and daytime tiredness. Associated conditions include OBESITY; ACROMEGALY; MYXEDEMA; micrognathia; MYOTONIC DYSTROPHY; adenotonsilar dystrophy; and NEUROMUSCULAR DISEASES. (From Adams et al., Principles of Neurology, 6th ed, p395)

More From BioPortfolio on "Domiciliary Diagnosis and Follow up in Obstructive Apnoea Syndrome"

Quick Search


Relevant Topics

Sleep Disorders
Sleep disorders disrupt sleep during the night, or cause sleepiness during the day, caused by physiological or psychological factors. The common ones include snoring and sleep apnea, insomnia, parasomnias, sleep paralysis, restless legs syndrome, circa...

Asthma COPD Cystic Fibrosis Pneumonia Pulmonary Medicine Respiratory Respiratory tract infections (RTIs) are any infection of the sinuses, throat, airways or lungs.  They're usually caused by viruses, but they can also ...

Searches Linking to this Trial