Optional medical device diagnostics – depending on the results of the history, physical examination, laboratory diagnostics, and obligatory medical device diagnostics – for differential diagnostic clarification.
- Laryngoscopy (laryngoscopy) – for clinical suspicion of laryngeal snoring; may be combined with drug-induced sleep endoscopy (MISE)
- Cardiorespiratory polygraphy (examination in a sleep laboratory is used to detect breathing disorders during sleep; performed on an outpatient basis) – when nocturnal breathing disorder is suspected.
- Nocturnal oximetry (performed on an outpatient basis) – when nocturnal breathing disorder is suspected.
- Sleep videoendoscopy and pressure probe measurement: drug-induced sleep endoscopy (MISE) allows the upper airway to be observed in a sleep-like state; indications:
- Topodiagnostics (diagnostics for localization of a disease process) of the upper airway in the case of snoring alone.
- Differentiation from obstructive sleep apnea (OSA).
- Indication for surgical therapy on the soft palate.
- Polysomnography (PSG; sleep laboratory; measurement of various bodily functions during sleep that provide information about sleep quality) – in cases of suspected nocturnal breathing disorder (here: obstructive sleep apnea, OSA), in which the following parameters are monitored.
- Encephalogram (EEG; recording of the electrical activity of the brain).
- Electrooculography (EOG; method of measuring the movement of the eyes or changes in the resting potential of the retina).
- Electromyography (EMG; measurement of electrical muscle activity).
- Heart rate and blood oxygen saturation (SpO2) by pulse oximetry (measurement of arterial oxygen saturation via determination of light absorption or light remission during fluoroscopy of the skin) [primary snoring: O2 desaturation index (ODI) < 5/h and regular snoring sounds].