Laryngeal function studies (ie, aerodynamic testing and acoustic testing)
CPT4 code
Name of the Procedure:
Laryngeal Function Studies (commonly known as aerodynamic testing and acoustic testing).
Summary
Laryngeal function studies are diagnostic tests that measure how well the vocal cords and related structures function. Aerodynamic testing examines airflow and pressure during speech and breathing, while acoustic testing analyzes the sound characteristics of the voice.
Purpose
These studies help diagnose and evaluate voice disorders, speech impairments, and other conditions affecting the larynx and vocal cords. The goals are to identify abnormalities, guide treatment plans, and monitor progress.
Indications
- Hoarseness or changes in voice
- Difficulty speaking or breathing
- Suspected vocal cord paralysis or paresis
- Chronic cough or throat discomfort
- Pre- and post-operative assessment for laryngeal surgery
Preparation
- No special preparation is typically needed.
- Avoid smoking and excessive vocal use before the test.
- Inform the healthcare provider of any medications or existing health conditions.
Procedure Description
- The patient may be asked to sit in a comfortable chair.
- During aerodynamic testing, the patient wears a mask or mouthpiece to measure airflow and pressure while performing specific breathing and vocal tasks.
- Acoustic testing involves using a microphone to record the voice as the patient speaks or sings.
- The tests may also include visual assessments of the vocal cords using a laryngoscope or stroboscope.
- Data is collected and analyzed by specialized software to assess the function of the larynx.
Duration
The procedure typically takes 30 to 60 minutes.
Setting
Laryngeal function studies are usually performed in a hospital’s ENT (Ear, Nose, and Throat) department, an outpatient clinic, or a specialized speech therapy center.
Personnel
- Otolaryngologist (ENT specialist)
- Speech-language pathologist
- Audiologist (for acoustic testing)
- Nursing staff or medical assistants
Risks and Complications
- Minimal to no risks are associated with these non-invasive tests.
- Rarely, patients may experience mild discomfort or gagging during certain assessments.
Benefits
- Accurate diagnosis of voice and laryngeal disorders.
- Tailored treatment plans based on detailed functional analysis.
- Monitoring of treatment efficacy and recovery progress.
Recovery
- No downtime required; patients can resume normal activities immediately.
- Follow-up appointments may be scheduled to discuss results and treatment plans.
Alternatives
- Clinical vocal assessment by a speech-language pathologist.
- Imaging studies such as a CT scan or MRI.
- Direct laryngoscopy under anesthesia (for more detailed structural evaluation).
Patient Experience
- The patient might feel slight discomfort from wearing the mask or mouthpiece during aerodynamic testing.
- Generally, the procedure is painless and well-tolerated.
- Pain management and comfort measures are typically unnecessary due to the non-invasive nature of the tests.