CPT® Code 92564

Deleted

1. Indications

The Short Increment Sensitivity Index (SISI) is indicated for use in the following scenarios:

• Assessment of Sensorineural Hearing Loss The SISI test is primarily performed to evaluate patients who may have sensorineural hearing loss, as it helps in identifying the ability to detect small changes in sound intensity that are characteristic of this type of hearing impairment.
• Diagnostic Evaluation The test is utilized as part of a comprehensive audiological assessment to provide additional information regarding a patient's auditory capabilities and to assist in the differential diagnosis of hearing disorders.

2. Procedure

The procedure for conducting the Short Increment Sensitivity Index (SISI) involves several key steps to ensure accurate assessment of the patient's auditory sensitivity.

• Step 1: Preparation The patient is seated comfortably in a quiet environment, and earphones are fitted securely to ensure proper sound delivery. The audiologist explains the procedure to the patient, ensuring they understand the task of detecting changes in sound intensity.
• Step 2: Baseline Tone Presentation A pure tone is presented to the patient at a sound intensity level of 20 decibels. This tone serves as the reference point for the subsequent testing and is crucial for establishing the patient's baseline auditory perception.
• Step 3: Transient Tone Introduction After the baseline tone is established, a second transient tone is introduced. This tone is slightly louder than the baseline, with an increase in intensity ranging from 1 to 5 decibels. The audiologist carefully monitors the presentation of this tone to ensure it is superimposed accurately on the baseline sound.
• Step 4: Patient Response The patient is instructed to indicate when they perceive the transient increase in sound intensity. This response is critical for evaluating their sensitivity to small changes in auditory stimuli.
• Step 5: Data Collection The audiologist records the patient's responses, noting the number of correct detections of the transient tone. This data is essential for analyzing the patient's auditory sensitivity and determining the presence of any sensorineural hearing pathology.

3. Post-Procedure

After the completion of the Short Increment Sensitivity Index (SISI) test, the audiologist will analyze the collected data and prepare a written interpretation of the findings. This report will detail the patient's ability to detect changes in sound intensity and may indicate the presence of sensorineural hearing loss if the patient demonstrates difficulty in perceiving the transient tones. The results are typically discussed with the patient, and recommendations for further evaluation or treatment may be provided based on the findings. Additionally, the audiologist may suggest follow-up appointments or additional testing if necessary to further assess the patient's auditory health.