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Part B: Ear Impression Practicum — Information & Free Practice

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Part B: Ear Impression Practicum

Provider
North Carolina State Hearing Aid Dealers and Fitters Board
Format
Live-model ear-impression procedure, candidate stock-impression questions and anatomy labeling, and professional evaluation of one selected impression
Passing score
At least 70/100 on both Procedure and Evaluation; specified omitted safety procedures cause automatic failure.
Examination outline
  • PROCEDURE: Safety Practices and Ear Impression Technique
    • Cleaned ALL instruments before use
    • Began instruction before performing the otoscopic exam
    • Began instruction before breaking the seal of the impression
    • Gloves were worn throughout the procedure
    • Perform a pre-impression otoscopic exam using an appropriate light source
    • Use appropriate bracing using the otoscope during the pre-impression otoscopic exam
    • Use appropriate bracing while initially inserting the otolight/penlight in the ear canal
    • Use appropriate bracing maintained while adjusting otoblock
    • Perform an otoscopic exam using an appropriate light source after inserting or adjusting the otoblock/cotton block in the model’s ear
    • Use appropriate bracing while using the otoscope during the otoscopic exam
    • Use appropriate bracing while initially inserting impression instrument into the ear canal
    • Appropriate bracing maintained while impression material fills the ear canal
    • Visibly determine the readiness of the impression material
    • Break the seal before removing the impression and otoblock
    • Perform a post-impression otoscopic exam using an appropriate light source
    • Use appropriate bracing while using the otoscope for the post-impression otoscopic exam
  • IMPRESSION EVALUATION: STOCK MOLD (SM)
    • Is the otoblock flush with the material at the medial end of the impression (canal end)?
    • Has the impression material seeped around the otoblock (blow-by)?
    • Is the impression of an adequate length to show the second bend of the ear canal?
    • Which ear is this an impression of?
    • Is the impression appropriate for a CIC hearing aid fitting?
  • IMPRESSION EVALUATION: Human Ear Anatomy Labeling
    • Helix
    • Triangular Fossa
    • Scaphoid Fossa
    • Antihelix
    • Helix Crus
    • External Auditory Canal
    • Concha
    • Tragus
    • Antitragus
    • Intertragal Notch
    • Lobe
  • IMPRESSION EVALUATION: PROFESSIONAL EVALUATION (PE)
    • Has the impression material started to seep around the otoblock?
    • Does the impression of the ear canal clearly show the beginning of the 2nd bend?
    • Is the concha adequately defined?
    • Is the tragus adequately defined?
    • Is the area between the tragus and helix adequately defined?
    • Is the helix adequately defined?
    • Are there any impression-taking anomalies, including but not limited to weld marks, located in critical regions of the impression? (i.e., concha, tragus, helix, and/or area between tragus and helix)
    • Is the impression adequate for a full-shell ear mold for an 80 db HL flat hearing-loss?
Examination sources

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