Chapter 29: Sensory Function & Aging

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Welcome back to the Deep Dive.

Today is a little bit special because we are pivoting into what we like to call our Last Minute Lecture Series.

If you are a nursing student,

frantically highlighting your textbook with, I don't know, three different colors of neon markers, or maybe you're a practicing nurse just looking to brush up on the fundamentals of geriatric care.

Maybe you realized your assessment skills are a tiny bit rusty.

It happens.

It does.

Well, you are in exactly the right place.

That's right.

And honestly, even if you aren't in the medical field, I'd say stick around.

Don't touch that dial because the topic today affects, well, literally every single one of us eventually.

It really does.

We are looking at the aging body,

specifically the machinery we use to interface with reality.

We are talking about how we sense the world around us.

We are diving deep into gerontologic nursing, the fifth edition by Sue E.

Minor.

We're focusing exclusively on chapter 29, which covers sensory function.

A big one.

And honestly, when you first think about sensory function, you might just think, okay, do I need reading glasses?

Can I hear the TV?

Right.

Without blasting out the neighbors.

Exactly.

But looking at the source material, the stakes are way, way higher than that, aren't they?

They are so much higher.

The mission of this deep dive isn't just to help you memorize anatomy for an exam, though we will definitely help you do that.

It is to translate this dense textbook material into a guide for safe care.

Okay.

Because to your point, the senses vision, hearing,

taste, smell, touch, they are not just biological functions.

They are the human body's connection to the environment.

They are the lifeline.

The lifeline.

That's a good way to put it.

And when that connection starts to fray, it's not just an inconvenience.

It's not just annoying.

Exactly.

It becomes a safety issue, becomes a nutrition issue.

And perhaps most heartbreakingly, it becomes a social isolation issue.

I mean, think about it.

If you can't hear conversation at the dinner table,

you just, you stop going to dinner.

You withdraw.

You withdraw.

If you can't see the curb or the cracks in the sidewalk, you stop leaving the house.

So when we talk about nursing management of sensory changes in chapter 29, we are really talking about preserving independence and quality of life.

We are preventing the world from shrinking.

Well said.

Before we get into the nitty gritty of eyeballs and earwax, and we will get there, I promise, let's do a quick level set on the definitions the text provides.

It distinguishes between general senses and special senses.

What's the breakdown there?

It's a really useful distinction to keep in your pocket.

General senses are the ones with receptors scattered all over the body.

We're talking about touch, pressure, pain, temperature, and a big one for geriatrics.

Proprioception.

Proprioception.

I always stumble on that one.

That's the sense of knowing where your body parts are in space, right?

Precisely.

It's how you know your arm is raised above your head, even if your eyes are closed.

When you lose that, your risk of falls just skyrockets because you literally don't know where your feet are relative to the floor.

Wow.

Okay.

That makes sense.

And the special senses?

Those are produced by highly localized organs and specialized cells.

So sight, hearing, taste, smell, and balance.

Got it.

And the text makes one more really, really important distinction for nursing students to grasp.

The difference between sensation and perception.

Let's unpack that because they sound like synonyms in casual conversation.

Casual conversation, sure.

In nursing, they're very different steps in a chain.

Sensation is just the awareness of a stimulus.

It could be conscious or unconscious.

It's the nerve firing.

It's the hardware working.

The hardware.

Perception is the interpretation of that sensation.

It's the brain taking that raw signal and saying, oh, that's a red light, or that's a bell ringing.

It's the software.

So you can have the hardware working but the software failing.

Exactly.

You have intact sensation.

The eye sees the object perfectly but altered perception where the brain can't recognize what it is or vice versa like in hallucinations where there's perception without sensation.

As a nurse, you have to figure out where the break in the chain is to treat the patient effectively.

Got it.

Okay.

Let's jump straight into the big one.

Vision.

The text makes it clear that vision plays a massive role in activities of daily living or ADLs.

Dressing, cooking, driving.

It all starts with the eyes.

And the aging eye undergoes some fascinating and sometimes frustrating structural changes.

If you can visualize figure 29 to 1 from the text, we have the cornea, iris, lens, retina, optic nerve.

Aging hits almost all of them.

It's a comprehensive degradation.

Let's start from the outside and work our way in.

What happens to the external eye structures when we look at an older patient?

Well, gravity and loss of elasticity take their toll.

The eyelids lose tone.

You get this condition called philtosis where the lid droops.

And sometimes it droops so much it actually obstructs the visual field.

The skin becomes redundant.

Just extra skin hanging there.

The eyebrows change too.

In men, they often turn gray and get coarse and bushy.

It's kind of the mad scientist look.

I feel seen.

But interestingly, for both men and women, the text mentions thinning of the eyebrows on the outer edges.

Yes.

The temporal thinning.

It's a classic sign.

And moving to the surface of the eye, the conjunctiva, that membrane covering the eye, thins out and yellows.

Tear production drops, which we will definitely discuss more in a moment.

But there is one specific external change that usually freaks people out when they see it for the first time.

It's called arcicinellus.

Yes.

I wanted to ask about this.

It's described as a ring around the cornea.

Correct.

It's a gray or white ring that forms around the iris.

Families will often call the nurse in a panic, thinking the patient is going blind or their eye is calcifying.

Right.

It looks alarming.

It does.

But it's actually just a deposit of fat lipids around the cornea.

So what is the nursing intervention for arcicinellus?

Reassurance.

That's it.

The key takeaway for you as the nurse is this is normal.

It does not affect vision.

It requires no treatment.

It's just a sign of aging, like gray hair.

That is good to know.

Okay.

Moving inward, we pass the cornea and get to the pupil and the lens.

This seems to be where the functional vision changes really kick in.

Absolutely.

This is where physics starts working against us.

The pupil actually decreases in size as we age, and it loses the ability to constrict and dilate quickly.

That sphincter muscle just gets stiff.

So what does that mean, practically?

It means significantly less light is actually getting into the eye.

Is there a metric on that?

How much less light?

It's striking.

An older adult needs about three times as much ambient light to see as clearly as a 20 -year -old.

Wow.

Three times.

Yes.

So think about that.

When you are setting up a patient's room or doing a home safety assessment,

dim romantic lighting is actually a safety hazard.

They need bright, diffused light.

And because the people react slower, light adaptation is delayed.

If they walk from a bright hallway into a dark room, they are effectively blind for a much longer period than you or I would be.

A huge fall risk.

And then you have the lens.

The lens is supposed to be flexible and clear to focus light.

Right.

But with age, it increases in density and rigidity.

It gets hard.

And it also starts to yellow.

The text mentions this yellowing specifically affects color perception.

It does.

Think of it like wearing yellow tinted sunglasses all day, every day.

It acts as a filter for short wavelengths of light.

So blue light, basically.

Blue light, green light, violet.

This makes it very, very difficult to distinguish between those cool colors.

Blue, green, and violet start to look gray or they just merge together.

Practical application time.

If I'm a nurse giving discharge instructions.

Do not use color coding for those shades.

If you tell an older patient, take the green pill in the morning and the blue pill at night, you are setting them up for a medication error.

Because to them.

To them, both pills look dark gray, or at least they look incredibly similar.

Use shape, size, or clearly written labels instead.

It's so important.

That is a huge practical tip for medication safety.

And beyond color, this lens rigidity leads to some broader issues.

Decreased peripheral vision, diminished night vision, and a major increase in sensitivity to glare.

Glare is a big enemy of the aging eye.

Opacities in the lens scatter the light instead of focusing it.

It's why driving at night becomes so terrifying for many older adults.

The headlights.

Exactly.

Headlights don't just illuminate the road.

They create a blinding starburst effect that wipes out their vision.

Now, aside from the structural changes, the chapter lists some common complaints.

These are things that aren't necessarily diseases, but they are definitely annoying.

We're talking about floaters and flashers.

What are we dealing with here?

Floaters are incredibly common.

Patients describe them as dots, wiggly lines, or little clouds moving across their vision.

Yeah, I think I have some of those.

Most people do.

Physiologically, these are tiny clumps of gel or cellular debris floating in the vitreous humor, the jelly inside the eyeball.

And mostly harmless.

Generally, yes.

They are annoying, but normal.

The brain often learns to filter them out.

The text suggests teaching patients to look up and down to try and move the floater out of the central field of vision, you know, using gravity to settle it.

But you have to monitor them.

You have to monitor them because it can be a sign of something worse, right?

And that brings us to flashers.

This is when the vitreous fluid shrinks and pulls on the retina, creating an illusion of flashing lights or lightning streaks.

Now, sometimes this can be a migraine if you see jagged lines for 10 or 20 minutes, but it can also be a warning sign.

What is the red flag here?

When does a nurse say you need to see a doctor today?

Okay, we call it the shower and curtain rule.

If there is a sudden increase, a shower of floaters, a sudden onset of light flashes or visual hallucinations, that warrants an immediate referral to an ophthalmologist.

A shower of floaters, okay.

It could indicate a retinal tear or a detachment.

And if the patient says, it looks like a curtain is being pulled across my eye, stop everything.

That is an emergency.

Okay, so a sudden shower or curtain is a medical emergency.

Got it.

The other common complaint is dry eyes, which sounds simple, but the text mentions a paradox here that I found really interesting.

The tearing paradox, yes.

It confuses patients all the time.

Patients with dry eyes often complain that their eyes are watering constantly.

Which makes no sense to the lay person.

It does if you understand the feedback loop.

The eye is dry, maybe due to atrophy, the lacrimal gland, menopause or medications.

That dryness irritates the eye.

It feels gritty.

Like sand in your eye.

Exactly.

The eye responds to the irritation by reflexively producing more tears to flesh out the irritant.

But it doesn't help.

No, because those reflex tears are mostly water.

They don't have the right oil and mucus composition to actually lubricate and coat the eye.

So they just run down the face.

The eye stays dry and gritty and the cycle continues.

So treating it isn't about drying them out.

It's about lubricating them properly.

Right.

Artificial tears using humidifiers to keep the ambient air moist and wearing wraparound glasses outside to stop the wind from evaporating the moisture.

Let's move into the actual vision disorders.

The chapter breaks these down into a few categories.

First, we have the refractive and external issues.

The most common one, the one that hits everyone over 40, is presbyopia.

Ah, presbyopia, the fancy term for my arms aren't long enough to read this menu.

It happens because that lens we talked about loses elasticity.

It just can't thicken up to focus on close objects anymore.

And the solution is pretty straightforward.

Reading glasses or bifocals.

The prognosis is excellent.

It's just a fact of life.

Now, what about the eyelid issues?

The text contrasts ectropion and entropion.

I always mix these up.

How do we keep these straight?

Think of the prefixes.

Ectropion means the lid turns out.

The lower lid falls away from the eyeball.

Okay.

Extra for exit.

There you go.

This leads to tearing because the tears can't drain into the duct.

They just pool and spill over.

It looks red and raw.

And entropion.

Entropion is the opposite.

The lid turns in.

Ouch.

That sounds painful.

It is intensely painful.

When the lid turns in, the eyelashes turn in with it.

They rub against the cornea with every single blink.

Oh my gosh.

It's like having sandpaper in your eye constantly.

It puts the patient at high risk for corneal abrasion and infection.

Both of these are usually treated with minor surgery to tighten the lid muscles.

There is also mention of blepharitis.

This is a chronic inflammation of the eyelid margins.

Very common in older adults.

You'll see red, swollen lids and crusting or matting along the lashes, especially in the morning.

It can be caused by bacteria like staph or seborrheic dermatitis.

And the nursing intervention here is largely about hygiene, right?

It is.

The text is very specific.

Teach the patient to use a mild soap -like baby shampoo or ivory soap to gently scrub the lid margins to remove that crust.

A .V.

shampoo.

Yeah.

Doesn't sting.

And for the makeup wearers out there, this is a wake -up call.

Replace cosmetics every three to six months.

Seriously.

Every three months.

For mascara and things.

Yes.

Bacteria grow in those tubes.

It's a perfect environment.

And the text specifically says, never apply liner to the inner margin of the lid.

You are blocking the glands and just inviting infection.

Good advice for everyone, really.

All right.

Let's get into the big three blinding diseases.

Glaucoma, cataracts, and retinal disorders.

Let's start with glaucoma.

The text calls it the sneak thief of sight.

Why that nickname?

Because the most common form chronic open angle glaucoma is slow,

painless, and has almost no early symptoms.

It steals your vision before you even realize it's gone.

And what exactly is happening in the eye?

It's a plumbing issue.

It's a plumbing issue.

Yeah.

There is a fluid called aqueous humor that circulates in the front of the eye.

Normally, it drains out through a little meshwork.

In glaucoma, that drainage gets clogged or blocked, fluid builds up, pressure rises.

That's intraocular pressure or IOP.

And that pressure pushes back on the optic nerve, damaging it permanently.

And the vision loss follows a specific pattern, right?

This is important for assessment.

This is key.

Glaucoma takes your peripheral vision first.

You get tunnel vision.

Tunnel vision.

So you might see the car in front of you perfectly, but you don't see the pedestrian stepping off the curb from the side.

Now, that's the chronic type.

But the text also describes a medical emergency type,

closed angle glaucoma.

This is different.

This is a sudden, complete anatomical blockage.

The drainage angle snaps shut.

The IOP skyrockets.

And the symptoms are obvious.

Oh, yeah.

The symptoms are dramatic.

Severe eye pain, nausea and vomiting, seeing halos around lights, and a steamy looking cornea.

This requires immediate medical attention to save the eye.

For the chronic type, though, nursing management is heavily focused on medication.

Box 29 -2 in the text is the Bible for this.

The number one priority is teaching the patient that this is a lifelong condition.

Eye drops.

Usually beta blockers or prostaglandin analogs to lower pressure must be taken forever, even if they feel fine.

Even if their vision seems stable.

Especially then.

The drops are what's keeping it stable.

And there is a specific safety technique mentioned for administering these drops.

Pressing the lacrimal duct.

Yes, punctal occlusion.

This is a critical nursing skill.

After you put the drop in, you press gently on the inner corner of the eye, right over the tear duct for about one minute.

Why is that so important?

Because it prevents the medication from draining down the pier duct into the nose and throat, where it can be absorbed systemically.

Into the bloodstream.

Exactly.

Many glaucoma drops are beta blockers.

If they get into the bloodstream, they can cause a low heart rate, which is braided cardiac or even bronchospasm in someone with asthma.

Punctal occlusion keeps the drug in the eye where it belongs and protects the rest of the body.

Okay, moving from the sneak thief to the clouding.

Cataracts.

Cataracts are an opacity of the lens.

Basically, the clear window becomes frosted.

The text notes that almost everyone over 80 has them to some degree.

It's oxidative damage over time.

What are the symptoms compared to glaucoma?

How would a patient describe this?

Instead of tunnel vision,

you get blurred or misty vision.

It's like looking through wax paper or a dirty window.

You lose color perception and you have significant glare sensitivity.

And unlike glaucoma, surgery isn't just a management tool, it's a cure.

Correct.

They remove the cloudy lens and usually put in a clear implant.

It's an incredibly successful surgery.

But the post -op nursing care is critical here.

The text outlines a strict list of do's and don'ts for home care to prevent raising pressure in the eye while it heals.

Let's run through those.

What are the big don'ts?

Don't rub the eye, obviously.

Don't lift heavy objects.

Usually the limit is nothing over five or ten pounds.

And here's a big one.

Don't bend at the waist.

If you need to pick something up, kneel down.

Why no bend?

Bending over rushes blood to the head and spikes eye pressure.

We want to keep that pressure stable so the incision heals.

It's the same reason we tell them to avoid straining during bowel movements.

The Valsalva maneuver increases pressure in the head.

So stool softeners are probably a good idea.

Stool softeners are often prescribed routinely post -op.

Absolutely.

And the do's.

Sleep on your back or the unaffected side.

Wear an eye shield at night so you don't accidentally rub it in your sleep.

And wash hands meticulously before doing drops to prevent infection.

Okay, we have covered the front of the eye.

Let's go all the way back to the retina.

The leading cause of blindness in older adults is AMD age -related macular degeneration.

This is a devastating condition because it attacks the macula, which is the tiny spot in the center of the retina responsible for sharp central vision.

So unlike glaucoma, which takes the side vision, AMD takes the center.

Exactly.

You can see the door frame, but you can't see the face of the person walking through it.

You can't read, you can't sew, you can't recognize loved ones.

It's incredibly isolating.

The text distinguishes between dry and wet AMD.

Right.

Dry is the more common form.

It's slow, caused by breakdown of tissue and little yellow deposits called drusen.

Wet is much more rapid and severe, caused by abnormal blood vessels growing under the retina and leaking fluid or blood.

Is there a way to self -monitor for this?

I think the text mentioned a tool.

Yes, the Amsler grid.

It looks like a piece of graph paper with a dot in the center.

The patient covers one eye and stares at the dot.

If the straight lines of the grid start to look wavy or crooked, or if pieces of the grid are missing, that's a sign the disease is progressing or turning from dry to wet.

Which would require immediate follow -up.

Pumidiate.

We also have diabetic retinopathy, which just emphasizes the need for yearly exams for diabetics to check for microaneurysms.

And finally, retinal detachment.

We touched on this with the flashers, but let's reiterate.

This is an emergency.

What does the patient experience?

The classic description is a curtain or a veil being drawn over their vision.

You might also see that shower of floaters we talked about or flashes of light.

It is painless, which is deceptive.

And the nursing intervention.

Medi -bedrest.

The positioning is critical, often positioning the head, so gravity keeps the retina against the back of the eye until surgery can be done, and patching both eyes to reduce movement.

You are trying to prevent the retina from peeling off any further.

Before we leave vision, we have to talk about the care for patients who already have low vision.

The text gets into the psychosocial impact.

It compares the grief reaction to death denial, anger, depression.

It's a huge loss of self.

It's a loss of independence.

And practically, we need to help them navigate safely.

Boxes 29 to 4 through 29 to 6 give us strategies.

One of the most famous is the clock method for eating.

Explain that for us.

So imagine a plate as a clock face.

If you should set a tray down, the patient might stick their hand in mashed potatoes or knock over their juice.

Right.

So you tell the patient, your potatoes are at 6 o 'clock, your beans are at 12 o 'clock, and your drink is at 2 o 'clock.

It allows them to eat independently and with dignity.

I love that.

And for walking,

the sighted guide technique.

Please never grab the patient and push them.

That's terrifying and takes away their control.

You offer your elbow, you let them hold on to you, you walk slightly ahead.

And you narrate.

You narrate.

You describe the surroundings.

We're approaching a narrow doorway or there is a step up here.

It builds trust and safety.

And environment matters too.

High contrast.

Yes.

Contrast is key.

Don't put a white plate on a white tablecloth.

They won't be able to see it.

Put a red toothbrush on a white sink.

Paint the edge of the stairs with a contrasting color.

You are trying to define the boundaries of the world for them.

All right.

Let's shift gears or rather shift senses.

Let's talk about the aging ear.

Hearing and balance.

What does the text tell us about the anatomy of an old ear if we can visualize figure 29 to 2?

Well, weirdly, the external ear, the auricle, actually gets larger.

The cartilage continues to form.

So your ears really do get bigger.

They do.

And for men specifically, the tragus, that little flap in front of the canal, often gets hairy.

Hairy tragus.

Nature is truly cruel.

It gets worse.

The ear canal narrows.

And the cerumen glands, the wax glands atrophy.

This means the earwax produced is drier and harder.

So narrower canal plus hairy tragus plus dry wax equals?

Impaction.

It's a perfect recipe for blockage.

Cerumen impaction is a major but reversible cause of hearing loss.

And the text notes it can even cause confusion or paranoia in older adults.

Oh, so.

Because they can't understand what's happening around them.

So they withdraw or act out.

They might think people are whispering about them when they just can't hear the conversation.

How do we get it out?

There is a specific protocol, right?

We don't just dig.

Never dig.

And don't use Q -tips, which just pack it in further.

First, you have to soften it.

Use a softening agent like mineral oil or product like Deep Rocks for a few days.

Turn that concrete into mud.

OK.

Then gentle irrigation with warm water.

You aim the flow upward toward the top of the ear canal to get behind the wax.

If you aim directly at the wax, you risk pushing it deeper or even perforating the eardrum.

If you aim up, the water goes over the wax, hits the eardrum gently, and then pushes the wax out from behind.

But, and this is a huge safety alert, you never ever irrigate if there's a perforated eardrum or a history of one.

You could cause a massive infection in the middle ear.

Right.

Check history first.

Now, hearing loss itself.

We have conductive loss like wax blockage and sensorineural loss, which is nerve damage.

The classic aging hearing loss is presbycusis.

Presbycusis is bilateral and sensorineural, and the key characteristic is the loss of high -pitched sounds first.

What does that mean for communication?

It means they lose the consonants.

Sounds like F, S, T, H, and SHU are all high -frequency.

Vowels are low -frequency.

So if I say, the fish is fresh.

And you can't hear the F or SHU.

You might hear,

uh, I, I, it just sounds like gobbling.

So shouting doesn't help?

No.

Shouting usually just amplifies the low vowels.

It makes them mumbling louder and can actually be painful.

The nerthing intervention is to lower the tone of your voice.

Face the patient so they can lip read and pick up visual cues and speak clearly.

We also have tinnitus ringing in the ears.

The text mentions it can be subjective or objective.

Subjective is what you usually think of, only the patient hears it.

It's a phantom sound, often from nerve damage.

Objective is very rare.

The examiner can actually hear it with a stethoscope, usually due to blood flow turbulence or muscle spasms near the ear.

How do you manage that?

Management is largely about masking the sound.

So white noise, a fan, a radio tune between stations,

anything but silence.

Because silence makes the ringing seem louder by comparison.

Balance is the other function of the ear.

Meniere's disease is highlighted here.

Meniere's is caused by too much endolin fluid in the inner ear.

It presents as a classic triad, vertigo, tinnitus, and hearing loss.

And that vertigo is severe.

It's incapacitating.

The patient feels like the world is spinning violently.

They often vomit.

The immediate intervention is safety lie down immediately to prevent falls.

Keep the head still.

And long term.

We try to reduce the fluid.

Low sodium diet is key because salt holds onto water.

And diuretics like hydrochlorothiazide are often prescribed.

Moving on to the chemical senses, taste and smell.

The text suggests these decline too, but maybe not as dramatically as vision and hearing.

Well, smell decline is pretty dramatic, and that's a huge safety risk.

If you can't smell smoke from a fire or a gas leak or spoiled food, you are in danger.

So we need to encourage families to check gas pilots and food expiration dates visually and have working smoke and carbon monoxide detectors.

Paste is variable, but by age 70, there is usually some loss.

However, there is a condition called xerostomia that makes everything worse.

Drain a mouth.

Now, the text clarifies.

Xerostomia is not a normal part of aging.

It is usually a side effect of medications.

The anticholinergics, diuretics, antidepressants.

Exactly, all the common ones.

Or diseases like Sturgren's syndrome.

What does the nurse look for?

The sticky mucosa.

You run a gloved finger along the inside of the cheek, and it just drags.

The tongue might look like raw meat, red, smooth, and inflamed, or have a thick white coating.

And beyond being uncomfortable, it ruins teeth.

It destroys them.

Saliva buffers acid and protects enamel.

Without it, cavities run rampant.

Interventions include sugar -free candy to stimulate flow, frequent sips of water, artificial saliva sprays, and really careful oral hygiene with fluoride toothpaste to prevent infection.

Finally, let's touch on touch.

Pun intended.

Always intended.

The text says the density of touch receptors decreases.

Right.

And the threshold for pain and temperature increases.

That means it takes a hotter object to make you feel hot.

Which is a burn risk.

A huge burn risk.

They might not feel that bath water is scalding until the damage is done.

Or, combined with something like diabetic neuropathy or peripheral vascular disease, they might not feel a pebble in their shoe.

And they walk on it all day.

They walk on it all day.

And by evening, they have a massive pressure ulcer that can lead to amputation.

So the nursing priority is injury prevention.

Constant injury prevention.

Inspect the feet daily.

Use a thermometer for water temperature, not your hand.

It's all about external monitoring because the internal sensors are failing.

So, bringing this all together.

We've covered a lot of anatomy and a lot of scary sounding conditions.

What is the big picture here for a nursing student to take away?

The synthesis is this.

Sensory loss in the older adult is not just about getting old.

It is a direct threat to independence, safety, and self -esteem.

When we assess a patient, we aren't just checking boxes on a chart.

We're checking their lifeline to the world.

And the nurse's role is to help maintain that lifeline.

Precisely.

Through routine screenings for glaucoma and diabetic retinopathy.

Through environmental modifications like better lighting and high contrast.

Through patient education on how to clean eyelids or take drops properly.

It's the small things.

These seem small, but they keep people independent.

They keep people in their homes and engage with life.

I want to leave our listeners with one final thought from the text.

It mentioned something that really stuck with me.

The link between sensory loss and confusion.

Yes.

This is the provocative thought for the day.

So often, older adults are labeled as confused or demented, when in reality, they just can't see or hear what is happening.

If you ask a question and they don't answer correctly, is it because they didn't understand?

Or is it because they simply didn't hear you?

If they stumble, is it because they are disoriented or because they didn't see the carpet edge?

So before we assume cognitive decline.

Check the sensory input.

Check the hearing aid battery.

Clean the glasses.

Turn on the lights.

Ensure the signal is getting in before you judge how the brain is processing it.

You might find that the confused patient is actually sharp as a tack, just isolated by their failing senses.

And that's something a nurse can fix.

That is a powerful takeaway.

Thank you so much for breaking down chapter 29 with us.

My pleasure.

It was great.

To our listeners, good luck with your exams.

Watch out for the hairy tragus.

And more importantly, go provide some safe sensory aware care.

This has been the Last Minute Lecture Team on the Deep Dive.

Thanks for listening.