Anesthesia & Clinical Research
Open Access

Abstract

Obstructive Sleep Apnea Syndrome-Prevalence and Screening in the Preadmission Clinic

Friederike Kuhlmey, Edda Klotz, Thomas Volk, Matthias Hölzl, Claudia D Spies, Ingo Fietze, Ekkehart Dietz and Juergen Birnbaum

Objective: The aim of this study was to evaluate the suitability of 2 different screening methods for the detection
of obstructive sleep apnea syndrome (OSAS) in the preadmission clinic at a university hospital.
Methods: Patients were screened for OSAS using 2 different methods.
Method 1: If they were deemed conspicuous by answering three specific medical history questions (daytime
sleepiness, snoring and BMI (body mass index)), the patients hat to fill in the Epworth Sleepiness Scale (ESS).
Method 2: All patients had to fill in the ESS.
An ESS-score of 10 or higher was deemed conspicuous and regarded as a high risk for OSAS.
The length of hospital stay of these patients was compared to a matched non OSAS group.
Results: Of the 4355 (100%) patients evaluated with method 1, 109 (2.5%) had a known OSAS and 631 (14.5%)
had to fill in the ESS-Score in consequence of the 3 specific medical history questions. 82 (13% of the 631 patients)
of them reached a score ≥ 10, which equals 1.9% of all patients screened with method 1. At least 191 (4.4%) of all
patients who were screened with method 1, were declared as conspicuous.
Of the 3415 (100%) patients detected with method 2, 115 patients (3.35%) had a known OSAS. 115 patients
(3.35%) achieved an ESS score ≥ 10. Thus 230 patients (6.7%) screened with method 2 were classified as
conspicuous.
The deviation of mean hospital stay was significantly higher in the group of conspicuous patients compared to the
inconspicuous patients.
Conclusion: At the pre-admission clinic more patients with OSAS or high risk for OSAS were detected using a
standardized screening tool (ESS-Questionnaire) compared to specific questions alone.
Due to the increased risk for perioperative complications, the preoperative detection is essential for perioperative
management and to initiate further diagnostics and therapy.