Recorded Lecture cont. topic 5: sl. 59 —> topic 6:

Audio Test Overview

  • Whisper Test: Focuses on hearing acuity.

    • Procedure: Requires the patient to cover one ear while the examiner whispers a series of three unrelated words.

Tuning Fork Tests

  • Introduction: Explains the use of tuning fork tests to assess hearing, mainly differentiates between the Weber and Rinne tests.

  • Weber Test:

    • Definition: A test used to evaluate the conduction of sound in the ears via bone conduction.

    • Procedure:

    • Strike the tuning fork while holding the stem to prevent dampening vibrations.

    • Place the base of the struck tuning fork on the center of the patient's head.

    • Assessment: Ask the patient if they can hear it better in one ear or both.

    • Normal Outcome: Equally heard or felt in both ears.

    • Abnormal Outcome: Sound lateralizes to one ear, indicating potential pathology.

    • If lateralizes to the better ear: Suggests sensorineural loss.

    • If lateralizes to the poorer ear: Suggests conductive loss.

  • Rinne Test:

    • Definition: A test to compare air and bone conduction.

    • Procedure:

    • Strike the tuning fork and place it on the mastoid bone (behind the ear) until the patient can’t hear it anymore.

    • Move the tuning fork in front of the ear and ask the patient to indicate when they can no longer hear it.

    • Normal Outcome: Air conduction is twice as long as bone conduction (2:1 ratio).

    • Abnormal Outcome: Lack of this ratio can indicate different types of hearing loss.

    • Conductive Hearing Loss: Bone conduction is greater than or equal to air conduction.

    • Sensorineural Hearing Loss: Air conduction is greater than bone conduction, but not at the 2:1 ratio.

Types of Hearing Loss

  • Conductive Hearing Loss: Results from mechanical issues that prevent sound waves from reaching the cochlea. Common causes include:

    • Earwax (cerumen impaction)

    • Foreign bodies in the ear canal

    • Fluid in the middle ear (otitis media)

    • Ear infections

    • Otosclerosis (stiffness of the ossicles)

  • Sensorineural Hearing Loss: Results from damage to the auditory nerve (CN VIII) or the brain's processing centers. Common causes include:

    • Age-related hearing loss (presbycusis)

    • Ototoxic medications

    • Noise exposure (occupational or recreational)

    • Injury or lesions affecting the auditory pathway

Pediatric Considerations

  • Children's Ear Assessment:

    • Newborns have different otoscopic procedures.

    • For children under 3, the ear canal is straightened by pulling down and back instead of just back as in adults.

    • Increased incidence of ear infections: Frequent otitis media can necessitate tubes to allow for drainage.

Older Adults Considerations

  • Hearing Changes: Tympanic membrane may appear thicker and less translucent with age.

    • Presbycusis: Age-related loss primarily affecting higher frequencies and the ability to distinguish consonants.

    • Additional anatomical changes in older adults, such as changes in the ear structure and lobe appearance.

Nose Examination

  • Health History: Essential inquiries include:

    • Surgeon history of nasal surgeries, trauma, allergies, infections, etc.

    • Check for nasal discharge color, congestion, and epistaxis (nosebleeds).

    • Ask about use of nasal sprays, including illegal substances.

  • Nasal Inspection:

    • Symmetry and appearance: The nose should look symmetrical and midline.

    • Palpate for tenderness and assess for any obstruction or lesions.

    • Inspect the nasal mucosa for color and moisture.

Oral Inspection

  • Health History of the Mouth: Important aspects to consider include:

    • Trauma, sores, bleeding gums, oral hygiene practices, any issues with swallowing, etc.

  • Inspecting the Lips and Mouth: Assess color, texture, and moisture of the lips, mucous membrane, and teeth.

  • Gum Inspection: Healthy gums appear pink and stippled without bleeding. Abnormal findings include swollen or bleeding gums (gingivitis).

  • Tongue Inspection: Normal findings include pink color, moisture, and smoothness; abnormalities may indicate deficiencies or diseases.

Neck Examination

  • Theory and Anatomy: Evaluating the neck involves palpation for lymph nodes and assessment of symmetry and muscle strength.

  • Lymph Node Assessment:

    • Assess for size, shape, mobility, and tenderness.

  • Symmetry Check: Should be midline and erect; absence of lumps or spasms.

Conclusion and Practicum Details

  • Students will practice Weber and Rinne tests, whisper tests, and inspection of the external ear, nose, and mouth.

  • Important points include techniques for checking nasal patency and evaluating the condition of the mucous membranes.

  • Special instructions for older and pediatric patients to adjust assessment techniques accordingly.

Practice Scenarios

  • Case Studies: Exam scenarios provided for students to engage with concepts of auditory testing and anatomical inspection, along with relevant conditions.