ERS Respiratory Channel

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Abstract

Background

Chiari malformation Type I (CM1) is a congenital hindbrain anomaly characterized by a cerebellar tonsillar descent below the plane of the foramen magnum (>3mm). In CM1 patients a high prevalence of sleep related breathing disorders (SRBD) has been described.

Aim

Describe prevalence and characteristics of SRBD in CM1 patients and correlate the severity of SRBD with tonsillar descent.

Methods

Retrospective observational study of CM1 patients sent to our unit between 02/2018-10/2022. Review of clinical records and polysomnography (PSG) results.

Results

28 patients whose characteristics are reflected in Table 1. PSG results detailed in Table 2. Three patients AHI<5; half of them AHI>15 and 40% CAI>5. No significative correlation was found between AHI and tonsillar descent (Graphic 1). Prescribed treatments for SRBD are summarized in Graphic 2.

Conclusion

The study confirms a high prevalence of SRBD in CM1 patients. Most are normoweighted young women with positional OSA. Half of patients present moderate-severe OSA and 40% CAI above 5. Statistical significance was not obtained in the correlation between AHI and tonsillar descent (values close to significance).

Abstract

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