Chapter 23: Auditory Problems: Assessment & Management

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Welcome to the Deep Dive.

Today, we're getting into something absolutely essential,

something we rely on constantly, our hearing.

It's obviously about sound, but it's so much more, isn't it?

Communication, connection, and when it's impaired, well, it hits function, cognition,

just overall well -being.

So today we're diving deep into the auditory system using your go -to text, Lewis's Medical Surgical Nursing, as our guide, our mission, to take that dense chapter and make it really clear, really useful for you as a future nurse.

Exactly.

We want to cut through all the complexity, break down how hearing works, look at common problems, and really zero in on your role as a nurse.

Assessment, management, the whole picture.

Think of this as bridging the gap, you know, connecting to what the conditions to why it matters for patient care.

We'll look at pathophysiology, but always bring back to the bedside, and we use scenarios like RS's case to make it stick.

Okay, let's start with the basics.

Before we tackle problems, we need to get a handle on normal function.

The auditory system, it's incredibly complex, but we can break it down into two main parts.

You've got the peripheral and the central systems.

The peripheral auditory system that's basically the ear itself, right?

External, middle, and inner ear.

It handles sound reception, perception, and importantly, the inner ear does balance too.

Right.

And then the central auditory system is more about the brain side of things, the nerve pathways, like the vestibulococlear nerve, cranial nerve 8, and the brain's auditory cortex.

That's where sound gets interpreted, where meaning is assigned, and where equilibrium signals are processed.

What's really key here, I think, is understanding the difference in how sound travels and how damage affects hearing.

So air conduction is the pathway through the external and middle ear.

Right.

They collect and amplify the sound waves.

If you have problems there, like your wax blockage or middle ear fluid, you get conductive hearing loss.

Sound intensity is down, maybe distorted.

But then there's sensor neural hearing loss that's damaged deeper in the inner ear or along those nerve pathways.

And that's different.

It's not just faint sound.

People often struggle to understand speech.

It can be really profound, even total loss sometimes.

And there's a third type.

Yeah.

Central hearing loss.

That's a processing issue in the brain.

The ears might be working okay, the nerve too, but the brain struggles to make sense of the words.

That's less common, but important to know.

Got it.

Okay.

Let's quickly trace the path of sound.

So the external ear, the part we see, the auricle or pinna, it funnels sound into the external auditory canal.

That canal has little hairs, glands, making sermon earwax for protection.

And at the end of that tunnel, the tympanic membrane, the eardrum, should look pearly, gray, shiny,

kind of translucent if you peek with an otoscope.

And when that eardrum vibrates, the sound moves into the middle ear.

This is an air -filled space.

Super important here is the eustachian tube or auditory tube.

Right.

The pressure equalizer opens when you yawn or swallow.

Exactly.

And the middle ear also has those tiny bones, the smallest in the body, the ossicles, malleus, enticus, and stapes.

They form a bridge, basically.

Carrying vibrations from the eardrum.

Across to the oval window, which is the entrance to the inner ear.

Okay, now the inner ear, this sounds complicated, labyrinths.

Yeah.

Think of it like a maze, a bony labyrinth filled with a fluid called perilymph.

And inside that, there's a membranous labyrinth holding another fluid, endolymph.

Two fluids?

Why?

Well, those fluid dynamics are critical for both hearing and balance.

Nestled in there is the organ of Corti, that's the real hearing receptor.

It changes those physical vibrations into electrical nerve impulses.

And then for balance, you've got the three semicircular canals in the vestibule.

They sense head movement.

All these signals, hearing and balance, travel along cranial nerve 8 to the brain.

Wow, okay.

That's quite a journey for a sound wave.

So how do we actually measure sound loudness and pitch?

Good question.

We use decibels, dB, for intensity or loudness.

Zero dB is near silence.

Normal conversation, maybe 40 to 65 dB.

The danger zone starts around 90 dB for prolonged exposure that can cause damage.

And for frequency or pitch, we use Hertz.

Hertz, kids hear a huge range, but most human speech falls between 500 and 4 ,000 Hertz.

Knowing these helps us classify the type and severity of hearing loss.

And we have to talk about aging, right?

Things change.

Definitely.

Presbycusis, that's age -related hearing loss, is super common.

Third most common health issue in older adults, actually.

Really?

Wow.

Yeah.

Several things happen.

The ossicles can calcify a bit.

Serum gets drier and can impact more easily.

And there can be atrophy in the inner ear structures, affecting both hearing and balance.

They might have trouble filtering background noise, too.

And that ringing sound.

Tinnitus.

Yeah, that often comes along with presbycusis.

Very common complaint.

Okay.

So as nurses, assessment is huge.

And you're saying it's not just hearing, but balance equilibrium, too.

Absolutely.

They're so linked by the inner ear structures.

And differentiating symptoms can be tricky.

Is it vertigo, that true spinning feeling, often worse with head movement?

Or is it more general dizziness, like feeling off balance?

You might also see nystagmus, which is abnormal eye movement.

So gathering data.

Subjective and objective.

Always.

Always.

And for subjective data, the health history, you need to dig deeper than just Can you hear okay?

Ask about any past ear problems, childhood infections, maybe tubes, TM perforations.

Even things like mumps or measles can affect hearing later.

What about other health conditions?

Definitely ask about systemic diseases.

Diabetes, rheumatoid arthritis, MS -GRIP, they can all have auditory implications.

Head injuries are important, too.

And allergies, they can cause eustachian tube swelling.

And you mentioned ototoxic drugs.

Crucial.

Always, always ask about medications.

Over 200 drugs can potentially cause hearing loss, tinnitus or vertigo, aspirin and high doses, some antibiotics like immunoglycosides, loop diuretics like furosemide, NSAIDs, some chemo drugs, even some industrial chemicals.

So getting a detailed medication history is non -negotiable.

Non -negotiable.

And then really explore the impact using those functional health patterns, like does chewing hurt their ear?

Does sodium or alcohol make dizziness worse?

Thinking Is tinnitus disrupting sleep?

For cognitive perceptual, ask about otalgia, ear pain, or otorrhea, drainage.

Difficulty following conversations is a big one.

Patients often don't realize they're losing hearing gradually.

How does it affect their job, their social life, independence?

Let's bring in our case study, RS.

She's 57, comes to the ED, extremely dizzy.

Right ear feels plugged and is ringing.

She's nauseous, worried it's a stroke.

Her history includes mild osteoarthritis, she takes aspirin and ibuprofen, and she's had recent cold symptoms.

What jumps out at you there, subjectively?

Well, the cluster of extreme dizziness, the plug feeling, and tinnitus in one ear is a huge red flag for an inner ear issue.

The recent cold symptoms could suggest a viral cause, maybe labyrinthitis.

The AS -abuprofen use is noted, but less likely the primary cause of this acute picture.

The stroke worry is valid and needs ruling out.

Okay.

So then we move to the objective data, the physical exam.

What are we looking for?

Start with just observing.

Do they frequently ask you to repeat things?

Speak unusually loudly or softly?

Tilt their head.

Those are subtle clues.

Then the ears themselves.

Inspect and palpate the external ear, look for symmetry, any redness, swelling, lesions, tenderness over the mastoid bone, or when moving the tragus.

And then inside with the otoscope.

Right.

Use the otoscope for the external canal and TM.

Remember the technique.

Tilt the head away, pull the oracle up and back for adults.

Stabilize the scope.

Look for that normal pearly gray, shiny TM.

Note any bulging, retraction, fluid behind it, perforations, discharge.

But remember, you can only see the TM and canal, not the middle or inner ear.

And a quick hearing check.

Yeah.

Just see how they respond to conversation.

Maybe a whisper test at about 30 centimeters or even a ticking watch, though that's less common now.

Okay.

RS is objective findings.

Her neuro exam is normal.

Otoscopy is normal, but she can't hear a whisper on the right side.

Her gait is unsteady.

No nystagmus, though.

Now what concerns you most physically?

The unilateral hearing loss confirmed by the whisper test and the unsteady gait are the big ones.

Normal otoscopy makes outer middle ear problems less likely culprits for the hearing loss itself.

The unsteadiness immediately flags her as a fall risk.

Safety becomes priority number one.

Right.

And that leads us to more specific diagnostic studies.

Exactly.

You'll commonly see audiometry.

Pure tone audiometry gives you that graph, the audiogram, showing hearing thresholds in dB across different frequencies.

Shepich.

Speech audiometry checks how well they understand words.

And the tuning fork tests are really useful bedside tools.

The RIN test compares air conduction, AC, to bone conduction, BC.

Normally you hear longer by air, AC, BC, and conductive loss is reversed, BC, AC.

In sensorineural, both might be reduced, but AC is still BC.

Okay, AC usually better than BC.

Right.

Then the Weber test plays the tuning fork midline on the skull.

Normally sound is heard equally in both ears.

If there's a conductive loss in one ear, the sound seems louder in that affected ear.

Louder in the bad ear for conductive?

That seems counterintuitive?

It does.

But think of it like this.

The conductive loss blocks out ambient room noise for that ear, making the bone conducted sound seem louder by comparison.

Now, if it's a sensorineural loss, the sound lateralizes or seems louder in the unaffected good ear.

Ah, okay.

That distinction is key.

Very key.

There are other tests too, like tympanometry to check eardrum mobility or tests for balance disorders like ENG, but Wynn and Weber are fundamental.

So back to RS.

Her Weber test lateralizes to the left.

Her audiogram shows low frequency sensorineural loss on the right.

MRI is normal.

What's the picture now?

Weber to the left means the sound is heard better in the unaffected ear.

That, combined with her known right -sided hearing issue, points strongly towards sensorineural loss on the right.

The audiogram concerns this, specifically low frequency loss.

A normal MRI rules out things like an acoustic neuroma.

This pattern, unilateral low frequency sensorineural loss, vertigo, tinnitus, oral fullness, really points towards Meniere's disease.

Makes sense.

Okay, let's pivot to some common problems, starting outwards.

External otitis, swimmer's ear.

Right.

Inflammation or infection of the outer ear canal, often from swimming.

Chemicals or dirty water disrupt the canal's environment,

but also trauma picking the ear using those dreaded cotton swabs, even piercings.

What are the main symptoms?

The hallmark is otalgia, ear pain, that gets noticeably worse when you chew or pull on the oracle or push on the tragus.

You might also see swelling, some drainage, maybe fever if it spreads.

Management involves keeping the ear dry with moist heat, analgesics, and usually topical antibiotic or steroid drops.

Systemic antibiotics if it's severe.

And nursing care, prevention is key here, right?

Absolutely.

Teach proper drop administration.

Yeah.

Room temp drops.

Don't touch the tip to the ear.

Stay lying down for a couple of minutes.

But mostly prevention.

Keep ears dry after swimming.

Tilt the head.

Use a low setting hairdryer from a distance.

And please tell patients.

Nothing smaller than your elbow and your ear.

No cotton swabs.

Louder for the people in the back.

No cotton swabs.

They also cause serum and impaction, right?

Definitely.

Pushes wax deeper.

Can cause discomfort, hearing loss, tinnitus, vertigo.

Mild cases might respond to softening drops or gentle irrigation with body temp water, but severe impactions need professional removal.

Same goes for foreign bodies.

Don't try to dig them out and risk pushing them deeper or damaging the TM.

Okay, moving inward to the middle ear.

Acute otitis media, AOM.

This is that common ear infection, especially in kids.

Exactly.

Infection of the eardrum, ossicles, middle ear space.

Usually follows a cold or allergies when the Eustachian tubes swells shut, trapping fluid and bacteria.

Symptoms?

The big one is pain.

That pressure on the TM makes it red, bulging.

Often fever, maybe some drainage if the drum ruptures, and reduced hearing.

Treated with antibiotics,

usually.

Sometimes of myermotomy, small TM incision or tympanosomy tubes are needed.

And sometimes after AOM, you get otitis media with effusion that's fluid without active infection.

Feels plugged, maybe popping sounds, decreased hearing, but usually no pain or fever.

Often resolves on its own.

But if AOM happens over and over?

That can lead to chronic otitis media.

This can damage the ossicles, affect the mastoid bone behind the ear.

It might be painless, but cause significant hearing loss, sometimes dizziness.

A serious complication is classtetoma.

The skin cyst grows and can erode bone.

Needs treatment, often surgery.

Surgery like tympanoplasty to repair the eardrum or ossicles?

Let's keep post -op.

Expect hearing to be worse initially due to packing in the ear canal?

The main teaching is avoiding anything that increases inner ear pressure.

No straining, lifting, bending, forceful nose blowing,

cough or sneeze with the mouth open.

Keep the ear meticulously dry.

No swimming, careful showering for usually about six weeks.

Sleep on the unoperated side.

Report excessive drainage or severe dizziness.

Got it.

Another middle ear issue, otis sclerosis.

You mentioned this earlier.

Right.

This is hereditary.

Spongy bone grows around the stafes, fixing in the oval window.

Causes conductive hearing loss, usually gradual.

Often starts in young adulthood, typically both ears.

How is it diagnosed and treated?

RIN test will show BC greater than AC.

Audiogram shows that conductive gap.

Management can be hearing aids or sometimes oral sodium fluoride to try and slow the bone growth.

Surgery is often effective as stapedotomy or replacing the stapes with a prosthesis.

And post -op care for that.

Similar pressure precautions as tympanoplasty.

Dizziness, nausea, vomiting are common because you're working right near the inner ear balance structures.

Antimetics might be needed.

Tell a patient to move slowly and avoid sudden movements.

Okay, so now we're really moving into the inner ear.

And when we talk inner ear, we're often dealing with that tricky trio.

Vertigo, sensorineural hearing loss, and tinnitus.

Balance and hearing are really intertwined here.

Which brings us right back to RS who started vomiting and feeling like she was spinning like crazy.

This sounds like Meniere's disease.

It fits the classic picture perfectly.

Meniere's is thought to be caused by an excess buildup of endolymph, that inner ear fluid.

We don't know the exact cause, maybe genetic immune factors.

But the result is this disruption of both hearing and balance function, usually in one ear initially.

The attacks are episodic, sudden, and severe.

Intense vertigo, nausea, vomiting, often nystagmus.

Patients might describe tinnitus that roars or changes pitch, a feeling of pressure or fullness in the air and fluctuating progressive sensorineural hearing loss.

Some even have drop attacks suddenly feeling pulled to the ground.

It's debilitating and unpredictable.

How is it managed?

You said there's no cure.

No cure, unfortunately.

Management focuses on controlling symptoms.

During an acute attack, like RS was having, the goal is to reduce the vertigo and nausea.

We use meds like antihistamines, meclobazine, anticholinergics, scoplamine, benzodiazepines, lorazepam.

For severe vomiting, IV fluids and antibiotics like ondansetron are key.

Between attacks, we try to reduce frequency and severity.

Diuretics might be used.

A low -salt diet is often recommended.

Avoiding caffeine and alcohol can help some people.

Vestibular rehabilitation exercises can also be beneficial.

For intractable cases, there are surgical options.

Even injections like gentamicin into the middle ear to lessen the balance function of the affected ear.

So nursing care during an acute attack for someone like RS?

Safety first.

She's spinning, vomiting, unsteady.

Keep her in a quiet, dark room.

Minimize head movements.

Encourage her to keep her eyes closed or fix on a point if that helps.

Yeah.

Implement strict fall precautions.

Manage the nausea and vomiting.

Monitor INO.

Assist with any ambulation.

Provide reassurance these attacks are frightening.

And discharge teaching.

Huge focus on safety.

Teach them to sit or lie down immediately if they feel an attack starting.

Home safety assessment to reduce fall risks.

Avoid risky activities like swimming underwater or climbing heights until the vertigo is well controlled.

Emphasize adhering to diet and medications and doing balance exercises if prescribed.

And connecting back to RS, the ondansetron and lorazamin order were directly targeting her acute nausea and vertigo anxiety.

The goal is stabilization while confirming the diagnosis, likely Meniere's.

Are there other common inner ear things causing dizziness?

Oh, yes.

Benign paroxysmal positional vertigo, BPPV, is very common.

It's caused by tiny calcium carbonate crystals, ear rocks, breaking loose and floating in the semicircular canals.

Ear rocks?

Seriously?

Uh huh.

Yeah, that's the lamest term.

It causes short episodes of vertigo triggered by specific head movements like rolling over in bed, looking up.

The key differentiator.

No hearing loss typically associated with BPPV is often treated effectively with the Epley maneuver, which repositions those crystals.

And briefly, acoustic neuroma.

That's a benign tumor growing on cranial nerve eight, usually unilateral.

Early signs are key.

Progressive one -sided sensor neural hearing loss, maybe tinnitus, sometimes mild balance issues.

Treatment is radiation or surgery.

Critical nursing point post -op.

Watch for clear nasal discharge.

Could be a CSF leak.

Report immediately.

So let's quickly recap the main types of hearing loss just to crystallize this.

Conductive loss, problem in the outer or middle ear.

Think earwax, fluid, otoclerosis, TM perforation.

Sound transmission is blocked or dampened.

And they might speak softly.

Right, because their own voice sounds loud to them via bone conduction.

And they might hear better in noisy places because everyone else is talking louder, overcoming their conductive barrier.

Then sensor neural loss, damage to the inner ear, those hair cells in the organ of corti, or the auditory nerve pathway.

Causes include noise exposure, aging, presbycusis, manures, ototoxic drugs, infections.

And the key issue here is understanding speech.

They can often hear that someone is talking, but the words aren't clear, especially high -frequency consonants like S -F -S -T -H.

Sounds are muffled or distorted.

Hearing aids can amplify, but they can't always restore clarity if the nerve damage is significant.

Got it.

So amplification doesn't always equal understanding.

Exactly.

And hearing loss is classified by severity measured in decibels, dB.

From slight loss all the way to profound deafness.

Which brings us right to nursing management.

Communication seems like a huge piece.

It's absolutely central.

Deafness or hearing impairment is often called an invisible disability.

As nurses, we have to bridge that communication gap.

What are some practical communication strategies?

Okay, non -verbally.

Get their attention before speaking.

Face them directly with good lighting on your face.

Many people lip read to some extent.

Maintain eye contact.

Minimize background noise if possible.

If they hear better in one ear, move closer to that side.

Clear masks are helpful if you wear one.

And verbally.

Should we shout?

No.

Please don't shout.

Shouting distorts sound and can actually make it harder to understand, especially for sensor neural loss.

Speak normally and slowly.

Use clear, simple sentences.

If they don't understand, rephrase using different words.

Don't just repeat the same sentence louder.

Be prepared to write things down if needed.

And remember the impact, right?

Frustration, isolation.

Absolutely.

It can lead to irritability, social withdrawal, depression, even cognitive decline.

Patience, empathy, and adapting your communication are so important.

Think about it.

How would you ensure a patient with hearing loss truly understands critical discharge instructions or consents to a procedure?

You need specific strategies.

We also play a role in health promotion, preventing hearing loss.

Definitely.

Environmental noise control is number one.

Noise is the most preventable cause.

Teach about avoiding loud noise exposure using ear protection foam plugs, muffs, and noisy jobs or hobbies.

Even personal listening devices need volume control.

Regular hearing screenings are important too.

Immunizations.

The MMR vaccine prevents rubella, which can cause severe congenital deafness if a mother gets it during pregnancy.

And careful monitoring of patients taking ototoxic drugs.

Ask about tinnitus, hearing changes, balance issues.

If caught early and the drug is stopped, sometimes the damage can be reversed or limited.

And finally,

assistive devices.

Lots of options now.

Like hearing aids.

Right.

They amplify sound.

Yeah.

Many types.

Behind the ear.

BTE.

In the ear.

ITE.

In the canal.

ITC.

Completely in the canal.

CIC.

Fitted by an audiologist.

As nurses, we might help with basic care.

Cleaning the ear mold.

Changing batteries.

They usually last about a week.

Storing them safely.

And assessing readiness.

Does the patient accept they need it?

Can they manage the small device?

Teach them to start using it gradually in quiet places first.

Then build up tolerance to noisier environments.

What about implants?

Cochlear implants are amazing technology for severe to profound sensorineural loss.

They bypass the damaged inner ear parts and directly stimulate the auditory nerve.

It involves surgery and extensive rehab, but can make a huge difference in understanding speech and feeling connected.

There are also bone anchor devices for conductive loss.

And other strategies.

Speech reading.

Lip reading.

Helps people get maybe 40 % of understanding from visual cues.

Sign language, like ASL, is a full visual language radiation.

Remember, you need a qualified interpreter for important communication under the ADA.

And assistive listening devices.

ALDs.

Things like amplified phones.

TV listeners.

Flashing or vibrating alerts for doorbells or smoke detectors.

Even specially trained hearing dogs.

Lots of tools available.

It's about matching the right tool to the person's needs and abilities, especially considering things like presbycusis in older adults, where dexterity might also be an issue.

Okay, let's wrap up this deep dive.

Key takeaways.

A thorough assessment, subjective, and objective is critical.

Look for those subtle signs.

Yes, and always link it back.

Connect to the pathophysiology.

Why is the ear doing what it's doing in external otitis or Meniere's?

To the symptoms you see and the nursing actions you need to take.

Safety, communication, education.

Those are your pillars.

And a final thought to leave you with.

Hearing loss isn't just a physical deficit.

It has profound emotional and social dimensions.

As you move forward, think about how we, as a healthcare system, can better leverage technology and truly person -centered communication to empower these patients.

To foster inclusion.

Not just, you know, treat the ear as a separate part.

Thank you so much for joining us on this deep dive into auditory challenges.

Keep learning.

Keep questioning.

Keep building those essential nursing skills.

We are the Last Minute Lecture Team wishing you the very best in your studies and your future career.