Prof. Dr. Ahmet Özdoğan
ENT — General

Drug-Induced Sleep Endoscopy (DISE)

Dynamic evaluation method using flexible endoscopy under pharmacologically induced sleep to observe upper airway collapse patterns and guide OSA surgical planning.

Drug-Induced Sleep Endoscopy (DISE) is a concept in general ENT whose meaning becomes clear only when it is linked to examination findings. Dynamic evaluation method using flexible endoscopy under pharmacologically induced sleep to observe upper airway collapse patterns and guide OSA surgical planning. Age, symptom duration, comorbidities, earlier treatment and daily limitation can all change the interpretation. the finding assessment brings nasal-sinus symptoms, this entry throat-tonsil context, the clinical point upper-airway impact and the dictionary entry sleep links into one ENT frame. In this this topic practice approach, the term explains which finding is being assessed and why it matters. The first clinical frame for this term is to separate functional impact from safety concerns: DISE provides real-time observation of the level and type of upper airway collapse during propofol or dexmedetomidine sedation. This distinction prevents rushed treatment decisions.

In the first visit for the finding, the patient's goal and safety boundary are clarified. Duration, side, daily impact, response to medication or surgery and current reports are read together. this entry review may combine ENT examination, the dictionary entry endoscopic assessment, this topic oral cavity-oropharynx inspection and this term audiological testing when useful. the finding decisions record fever, this entry pain-bleeding pattern, the clinical point hearing or nasal blockage, the dictionary entry sleep impact and this topic infection recurrence separately. Assessment of this term looks for consistency between history and examination: To reduce inappropriate surgical selection, DISE should be added to preoperative planning especially in patients with suspected multilevel obstruction. If findings do not match, staged reassessment or a second opinion may be clearer than moving directly to a procedure. Laboratory work, audiology, endoscopy, ultrasound, CT, MRI or biopsy is requested only when it improves decision quality.

A the finding plan aims to reduce symptoms without adding unnecessary procedural burden. Mild stable findings are discussed as lower-urgency observation points, while progressive or structural changes are handled with more caution. this topic planning discusses medical treatment, this term allergy control, the finding endoscopic procedures, this entry adenoid-tonsil strategy or the clinical point airway surgery by indication. The goal in the dictionary entry is not to choose the most aggressive option, but to find the right step between safe observation and effective intervention. Options are ordered by comparing short-term relief with preservation of long-term function.

Monitoring for this topic compares previous examination, imaging, tests or operation notes with the current picture. this term follow-up compares pain, the finding nasal openness, this entry sleep quality, this term hearing impact and the finding infection recurrence over time. When this entry is explained, patient goals, medical necessity and realistic expectations meet on the same ground. Follow-up advice separates warning signs without creating panic; the clinical point course with frequent infection, sleep quality decline, fever or progressive obstruction deserves reassessment.

This the dictionary entry entry prepares patients and relatives but does not diagnose. Safer conclusions come from combining the complaint with examination findings, test results when needed, risk profile and a review plan.

Before the visit symptom onset supports follow-up timing discussion.

DISE Protocol

The procedure is performed in an operating theatre or endoscopy unit. Target sedation is Ramsay score 5 (superficial sleep-like) with bispectral index (BIS) maintained between 50-70. The flexible nasal endoscope is advanced from velum to epiglottis, assessing collapse at each level.

VOTE Classification and Surgical Planning

The VOTE classification codes each anatomical level as no (0), partial (P) or complete (C) collapse along with its pattern (anteroposterior, lateral, concentric). Retropalatal concentric collapse directs toward UPPP, tongue base collapse toward somnoplasty or genioglossal advancement, and epiglottic collapse toward epiglottopexy or trimming.

Clinical Value

AHI success rates with DISE-guided surgical selection are significantly higher compared with selection based on clinical examination alone. The procedure takes 20-30 minutes and complication risk is low. The lack of a standardised protocol remains a factor limiting reproducibility.

When to Plan DISE

DISE should be considered in patients planned for surgery due to OSA, those who cannot adhere to CPAP, or those with residual disease after surgery. It may not be mandatory in mild cases or when anatomical obstruction is very clear.

Frequently asked questions

What is Drug-Induced Sleep Endoscopy (DISE)?
Dynamic evaluation method using flexible endoscopy under pharmacologically induced sleep to observe upper airway collapse patterns and guide OSA surgical planning. Drug-Induced Sleep Endoscopy (DISE) is a concept in general ENT whose meaning becomes clear only when it is linked to examination findings.
When is Drug-Induced Sleep Endoscopy (DISE) clinically important?
In the first visit for the finding, the patient's goal and safety boundary are clarified. It is assessed together with examination, endoscopy or imaging in nasal, throat, sinus and upper-airway complaints.
When is ENT assessment relevant for Drug-Induced Sleep Endoscopy (DISE)?
ENT assessment becomes relevant if symptoms last more than a few weeks, become one-sided or progressive, or are accompanied by breathing, swallowing, voice, hearing or neck-mass findings.
What information helps assessment of Drug-Induced Sleep Endoscopy (DISE)?
It is useful to note when symptoms started, which side is affected, previous operations or treatments, current medication, imaging and test reports, and the effect on daily life. It is assessed together with examination, endoscopy or imaging in nasal, throat, sinus and upper-airway complaints.

Learn more about this procedure

Detailed guide from Prof. Dr. Özdoğan's clinic

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References

This glossary entry is for informational purposes only and does not constitute medical advice. Consult a qualified specialist for diagnosis and treatment.

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