Effect of Nasal Steroids in Snoring Intensity

Ioannis Koutsourelakis

Status and phase: Completed; Phase 1

Conditions: Snoring

Treatments: Drug: Nasal spray Normal Saline; Drug: nasal spray Budesonide

Study type: Interventional

Funder types: Other

Identifiers

NCT01849406

NASTER

Details and patient eligibility

About

It is anecdotally well known that patients snore more when their nose is blocked. However, the therapeutic effect of improving nasal airway patency on snoring indices remains a point of conjecture. Indeed, Braver et al examined the effect of a nasal vasoconstrictor and failed to show any improvement in the number of snores after its application, although apnoea-hypopnoea index (AHI)seemed to decrease. Furthermore, Hoffstein et al documented that dilation of the anterior nares in patients without nasal pathology has a relatively weak effect on snoring, and routine use of nasal dilating appliances was not recommended for the treatment of snoring. In contrast to the aforementioned studies, intranasal corticosteroids have been shown to improve sleepiness and reduce AHI in patients with obstructive sleep apnea (OSA) implying that there might be an equivalent result for the use of nasal steroids on snoring indices.

Additionally, the present authors have demonstrated a strong correlation between apnoea-hypopnoea index and oral/oro-nasal breathing epochs in patients with OSA and normal nasal resistance and that nasal surgery is effective only in OSA patients who preoperatively have decreased nasal breathing epochs.

It is plausible thus to suggest that snoring severity, in equivalence to OSA severity, might be associated to oral/oro-nasal breathing epochs and that improving nasal patency by nasal steroids might also increase nasal breathing epochs and lead to decreased snoring indices in patients who had decreased nasal breathing before the administration of nasal steroids.

Patients will be randomized in two groups: the patients of the first group will undergo a one week therapy of nasal budesonide, then two weeks of washout period, and thereafter one week of nasal normal saline. The patients of the second group will undergo a one week therapy of nasal normal saline, then two weeks of washout period, and thereafter one week of nasal budesonide. Before and after each treatment regimen patients will undergo an assessment, which will consist of anterior rhinomanometry and polysomnography with concomitant measurement of snoring indices and breathing route pattern.

The investigators hypothesize that the application for one week of nasal budesonide has a beneficial effect on snoring indices in patients who present before the application decreased proportion of nasal breathing epochs and in whom nasal budesonide succeeded in increasing nasal breathing epochs.

Full description

Snoring intensity would be measured using a calibrated microphone-sound meter system. The 2 microphones will be suspended at a distance of 1 m approximately above the surface of the patient's bed. This arrangement allows a non-invasive measurement of snoring that simulates the distance between sleeping bed partners. Before every study the system would be acoustically calibrated using a reference noise produced by a noise generator (86 dB). The signal would be sent at a sampling rate of 12 KHz through an analogue-digital converter to a computer system for subsequent analysis. All digitized signals will be recorded in the hard disk of a personal computer. A noise analyzer (Praat; Boersma 2005) will be used for the intensity analysis of snoring sound (Boersma, 2005).

Enrollment: 24 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. every night snoring;
2. no medication known to influence nasal resistance (e.g., antihistamines, vasoconstrictors, topical or systemic steroids);
3. no smoking for the last 6 months;
4. no upper or lower respiratory tract disease (e.g., upper respiratory tract infection, rhinitis, sinusitis, chronic obstructive pulmonary disease), including a history of nasal allergy; and
5. written informed consent from each patient.

Exclusion criteria

1. duration of snoring less than 60 minutes during sleep study, and
2. central apnoeas more than five percent of total apnoeas.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Quadruple Blind

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24 participants in 2 patient groups, including a placebo group

Nasal spray Budesonide

Active Comparator group

Description:

one week therapy of nasal budesonide (twice per day)

Treatment:

Drug: nasal spray Budesonide

Nasal spray Normal Saline

Placebo Comparator group

Description:

one week therapy of nasal normal saline (twice per day)

Treatment:

Drug: Nasal spray Normal Saline