Wednesday, February 10, 2021

Xerostomia and hyposalivation in patients with obstructive sleep apnea

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Abstract

Objective

(a) To report the xerostomia prevalence and severity in patients with obstructive sleep apnea (OSA). (b) To assess the saliva pH in patients with OSA.

Design

Simultaneous cohort observational clinical study.

Setting

In Sleep Medicine Centre at Lomonosov Moscow State University from March to June 2019.

Participants

The study was conducted on 30 patients with OSA aged from 35 to 65 years.

Main Outcomes Measures:

The diagnosis of sleep apnea was made after standard polysomnography using the Domino program. The severity of OSA was indicated using the Apnea‐Hypopnea Index. Xerostomia was evaluated using Fox's test. Hyposalivation was evaluated by measurement of salivary flow rate. Determination of the saliva pH was carried out with a pH meter. Statistical analysis was performed by one‐way ANOVA and Tukey‐Kramer multi‐comparison test.

Results

Twenty‐two out of 30 (73.3%) patients were diagnosed with "dry mouth". Hyposalivation was observed in 6 out of 30 (20%). Dry mouth on awakening was observed in 60.0%, 72.7% and 88.9% of patients with mild, moderate and severe OSA, respectively. The average salivary flow rate was 0.28ml/min, 0.24ml/ min and 0.14ml/ min, respectively. The average pH value in patients with mild, moderate and severe apnea was 6.40±0.017, 6.15±0.27 and 5.87±0.24, respectively.

Conclusions

In patient with mild and moderate OSA the saliva amount and rate are similar (P>0.05). With the increase of OSA severity both these parameters change (P<0.001). The acidity of the saliva was correlated with the level of OSA and it statistically increased with the increment of the OSA severity (P<0.05‐P<0.001).

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