Chapter 17: Nose, Mouth, and Throat

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Welcome to this Deep Dive.

If you are listening right now, chances are you're a college nursing student

and you are staring down some pretty, well, intimidating clinical assessments.

We know exactly how overwhelming that can feel.

You've got a mountain of material, a ticking clock.

And the pressure to not just memorize anatomy, but to actually apply it to real human beings in a clinical setting.

Exactly, it's a lot.

But take a deep breath.

Today, you and I are gonna conquer this together.

Consider this your personal one -on -one tutoring session.

You are definitely not alone in this process.

Our mission today is to thoroughly master the assessment of the nose, mouth, and throat.

We've structured our time together to follow the exact logical progression you will use at the bedside.

We'll start with the foundational anatomy, the what's and the where.

Then we'll transition into your subjective interview skills, figuring out exactly what questions to ask your patient and the clinical reasoning behind them.

You have the detective work.

Exactly.

And from there, we'll take those clues and apply them to your objective, hands -on physical examination techniques.

Finally, we will tie the whole picture together by walking through how to document your findings safely and accurately.

By the time we are done, you're gonna walk into that clinical lab feeling completely prepared to assess these systems.

Okay, let's unpack this.

Starting with the foundational concepts, structure, and function.

I always like to think of the nose as, well, the respiratory system's front door.

That's a great way to look at it.

It doesn't just act as a passive tunnel for air.

It is a very active job to warm, moisten, and filter everything we inhale.

It's an incredibly efficient filtration system, really.

The inner nasal cavity is lined with coarse hairs called vibrasae, which act as the first line of defense to catch large airborne particles.

The big stuff.

Further inside, there is a ciliated mucus blanket designed to trap finer dust and bacteria.

And if you ever look closely at the nasal mucosa compared to the oral mucosa, you'll notice it is significantly redder.

That is due to a very rich, underlying blood supply that is constantly working to warm the inhaled air to body temperature before it even reaches the lungs.

That rich blood supply brings up something I know is a major focus for clinical practice.

If a patient comes in holding a bloody tissue to their face, where exactly is that bleeding likely coming from?

You are looking for a highly specific anatomical landmark on the anterior part of the nasal septum called the Kieselbach plexus.

The Kieselbach plexus.

Yes, this is a dense vascular network and it is the most common site for epistaxis, which is the clinical term for a nosebleed.

If you have a patient with an anterior nosebleed, the Kieselbach plexus is almost certainly the source.

Now, if you move just laterally from that central septum, you encounter the lateral walls of the nasal cavity.

These walls aren't flat, they contain three distinct bony projections.

The turbinates.

Exactly, the superior, middle, and inferior turbinates.

Whenever I visualize the turbinates, I picture them almost like the radiators in an old building.

Oh, I like that.

Yeah, they exist to drastically increase the surface area within that small nasal cavity.

More surface area means more blood vessels and more mucus membranes are exposed to the air, which maximizes that warming and filtering work.

That is a perfect analogy.

And tucked directly underneath each of those radiator -like perbinates are specific clefts called metuses.

These are essentially the drainage pipes of the facial structures.

Your paranasal sinuses drain directly into the middle metus, while tears from the nasolacrimal duct drain into the inferior metus.

Speaking of the paranasal sinuses, these are the air -filled pockets within the cranium that lighten the weight of the skull and act as acoustic resonators for our voice.

But as a nurse performing a physical assessment, we can't actually access all of them, can we?

We cannot.

There are four pairs of sinuses, but only two are accessible to your physical examination.

You have the frontal sinuses, which are located in the frontal bone right above and medial to the eye orbits.

Then you have the maxillary sinuses, which sit in the maxilla, essentially making up the cheekbones.

Suggest those two.

Right, those are the two you can actually palpate.

The other two sets, the ethmoid sinuses between the orbits and the sphenoid sinuses deep within the sphenoid bone are simply too deep within the skull to be examined by touch.

Let's move our focus a little further south to the mouth and throat.

The mouth is really fascinating because it serves dual purposes as the start of the digestive system and as a secondary airway.

If we map out the roof of the mouth, the palate, it's distinctly divided into two zones.

You have the anterior heart palate, which is made of bone and looks distinctly whitish.

Then as you move posteriorly, it transitions into the soft palate, which is a muscular arch that is much pinker and highly mobile.

And below that palate, you have the tongue, which also has distinct surfaces you need to assess.

The dorsal surface, or the top, is covered in rough, bumpy peply.

But if you ask the patient to touch the tip of their tongue to the roof of their mouth, you see the ventral surface underneath.

This surface should be incredibly smooth, shiny, and you will see very prominent veins running along it.

We also need to map out the salivary glands.

There are three specific pairs we assess, and they each have distinct anatomical markers.

The first and largest is the parotid gland.

It sits within the cheeks right in front of the ear.

The duct that drains the parotid gland is called the Stenson duct, and it opens on the buccal mucosa, the inner cheek, directly opposite the second upper molar.

OK, that's the parotid.

Next, you have the submandibular gland, which is roughly the size of a walnut and tucked beneath the mandible at the angle of the jaw.

Its drainage tube, the Wharton duct, runs up and opens at either side of the frenulum right under the tongue.

Finally, the smallest of the three is the sublingual gland.

This one sits deep within the floor of the mouth and doesn't have one single duct.

Instead, it has many small openings scattered along the sublingual fold under the tongue.

What's fascinating here is how seamlessly the structures of the oral cavity transition into the throat, or the pharynx.

It isn't just a sudden drop -off.

The back of the mouth, the oropharynx, is separated from the oral cavity by a fold of tissue called the anterior tonsillar pillar.

Sitting right behind those folds are the tonsils.

And the tonsils are masses of lymphoid tissue.

Exactly.

When you inspect them, they should generally be the same pink color as the rest of the oral mucosa, but their texture is different, they look a bit more granular, and you will notice deep indentations on their surface known as crypts.

And positioned above the oropharynx, hidden behind the natal cavity, is the nasopharynx.

This is the space where the adenoids and the eustachian tube openings reside.

Anatomy isn't static, though.

A major part of clinical reasoning is understanding developmental variations across a patient's lifespan.

Take infants, for example.

I know a lot of new parents panic or assume their baby is teething when they start drooling heavily around three months of age.

It is an incredibly common misconception.

Infants simply begin producing saliva at about three months.

The reason they drool isn't necessarily because a tooth is erupting, it's because they haven't neurologically developed the coordination to swallow that excess saliva yet.

It is just a normal developmental milestone.

That makes so much sense.

You also see significant structural changes during pregnancy.

The increased blood volume and systemic vascularity can cause nasal stuffiness and epistaxis.

Pregnant patients might also develop hyperemic, softened gums that bleed very easily when brushing their teeth.

And as we look at aging adults, structural changes can deeply impact their quality of life.

A gradual loss of subcutaneous fat on the face can make the nose appear much more prominent.

More importantly, older adults often experience a decreased sense of taste and smell.

That might sound minor, but it can seriously reduce their appetite, leading to severe nutritional deficits.

Beyond age, you must be vigilant about genetic and environmental variations.

Let's look at the uvula, the fleshy pendulum hanging down in the back of the throat.

You might see a beefed uvula, where it is split either completely or partially down the middle.

Split in two.

Right.

This occurs in about 2 % of the general population, but the rate jumps up to 10 % in some Native American groups.

You also need to be aware of cleft lip and palate, which present with higher rates in Asian and Native American populations.

Interestingly, males have a two to one ratio over females for developing a cleft lip.

Another anatomical variation that can catch a new nurse off guard is a Taurus palatinus.

If you are inspecting a patient's mouth and you see or feel a hard bony ridge running right down the middle of their hard palate, it's easy to assume it's a tumor or something dangerous.

But it is actually a completely normal benign growth.

A Taurus palatinus occurs in roughly 20 to 35 % of the U .S.

population.

As the clinician, your job is to recognize it as a standard variation rather than an abnormality, which saves the patient from a lot of unnecessary anxiety and invasive testing.

All of that foundational anatomy directly fuels our interview skills.

We can't properly examine a patient until we gather the subjective data their personal health history.

When we start asking a patient about their nose, the standard questions cover discharge, frequent colds, trauma, and allergies.

But the big one is sinus pain.

Sinus pain requires deep clinical reasoning.

If a patient comes into the clinic complaining of immense sinus pressure and pain, you absolutely must ask them how they are treating it.

The evidence behind this is striking.

Up to 98 % of rhinosinusitis cases are viral.

98%.

Yes.

That means they will resolve on their own with time and supportive care and antibiotics will do absolutely nothing to help.

Yet clinical data shows antibiotics are still prescribed to about 80 % of these patients.

As a nurse, you are on the front lines of antibiotic stewardship.

Asking about their at -home treatment helps prevent the over -prescription of antibiotics and the resulting bacterial resistance.

We also need to gather subjective data on epistaxis.

If a patient mentions they get frequent nosebleeds, this is the perfect opening for evidence -based teaching.

Most people instinctively tilt their head back when their nose bleeds, which is the exact opposite of what they should do.

Tilting the head back causes the blood to drain down the back of the throat.

Swallowing significant amounts of blood heavily irritates the stomach and will almost certainly cause vomiting, complicating the situation further.

You need to advise the person to sit up straight, lean forward slightly, and firmly pinch the lower soft part of the nose for a full 15 to 20 minutes without letting go to check it.

Transitioning our interview to the mouth and throat, we want to ask about any history of sores, bleeding gums, toothaches, or hoarseness.

We also need to ask a very specific question about swallowing.

Here's where it gets really interesting, because you are screening for something called dysphagia.

In clinical documentation, distinguishing this term comes down to a single letter.

It is a massive clinical distinction.

Dysphagia, spelled with a G, refers to difficulty swallowing liquids or solids.

This points to an issue with the pharynx, the esophagus, or the local anatomy.

You must not confuse this with dysphagia, spelled with an S, which is a neurologic impairment of speech and language.

Mixing up that one letter in your charting changes the entire bodily system you are assessing and could severely misdirect the medical team.

When a patient reports a sore throat, we also have to put on our detective hats.

We need to figure out if it's a standard viral pharyngitis or if it is group A streptococcal pharyngitis, commonly known as strep throat.

Evidence -based guidelines provide four specific clinical features that make a group A strep infection highly likely.

You are looking for a fever over 100 .4 degrees Fahrenheit, the complete absence of a cough, the presence of tonsillar exudates those white patches of pus on the tonsils, and cervical adenopathy, which is swollen, tender lymph nodes in the neck.

So fever, no cough, exudate, and swollen lymph nodes.

Correct, if a patient presents with those features, rapid antigen testing is strongly warranted.

Catching and treating strep early prevents incredibly severe long -term complications like rheumatic fever, which can permanently damage the heart valves.

We also have to screen for habits and lifespan -specific risks.

We must ask about smoking and alcohol consumption.

Using both of these heavily in tandem exponentially increases the risk for oral and pharyngeal cancers.

We should also ask if the patient snores heavily or experiences excessive daytime sleepiness to screen for obstructive sleep apnea, or OSA, a condition that drastically increases cardiovascular risks over time.

And you must adapt these interview questions to the patient's age.

If you are interviewing the parent of a child, inquire about the child's daily dental habits and ensure their vaccinations are completely up -to -date.

The incidence of pertussis, or whooping cough, is currently rising due to vaccine hesitancy.

That's concerning.

It is.

Because of this, it is crucial to recommend a one -time Tdap booster for all adults who interact with infants.

Conversely, when interviewing older adults, you must specifically ask about xerastomia, which is the clinical term for dry mouth.

This isn't usually a standalone disease.

It is very often a direct side effect of widely prescribed medications, particularly antidepressants, anticholinergics, or antihypertensives.

So we've gathered the patient's story.

We have all our subjective clues.

Now we move to the physical examination to collect our objective data.

This starts with proper preparation.

You want the patient sitting up straight with their head positioned at your eye level.

If they wear any dentures, you need to politely ask them to remove them.

You cannot perform a thorough oral exam if the tissue is covered.

Absolutely.

You will need your equipment ready.

An otoscope equipped with a short, wide -tipped nasal speculum, a bright pen light, two wooden tongue blades, a cotton gauze pad, and clean gloves.

You begin with the nose, first testing the patency of the nostrils.

Have the patient push one nasal wing completely shut and ask them to sniff inward sharply through the open side.

This simple action checks for any internal obstruction.

Inherently, this also tests cranial nerve one, the olfactory nerve, even though formal scent identification isn't typically part of a routine bedside exam.

Good to know.

When it's time to look inside, you gently lift the tip of the nose and insert your nasal speculum into the vestibule.

The most important safety rule here is to carefully angle the speculum away from the nasal septum.

The septum has a highly sensitive vascular network, and pressing against it is extremely painful for the patient.

Once inside, you are inspecting the nasal mucosa.

What are the normal findings we wanna see versus the abnormal ones?

Normal nasal mucosa should look distinctly red, smooth, and moist.

You are carefully evaluating the tissue for any swelling, discharge, bleeding, or foreign bodies.

You also need to be able to distinguish the normal turbinates from abnormal growths like polyps.

Normal turbinates appear pink, they are firmly fixed in place, and they are highly vascular.

And polyps.

Polyps, which are benign growths that often accompany chronic allergies, look entirely different.

They are smooth, pale gray, mobile if touched, and vascular.

After inspecting the internal nasal cavity, we objectively assess the paranasal sinuses.

We do this by palpating the frontal sinuses, pressing firmly up and under the eyebrows, and the maxillary sinuses, pressing directly below the cheekbones.

The patient should feel firm pressure, but no pain.

If those areas are tender to the touch, it strongly points to chronic allergies or an acute sinusitis infection.

There is also a highly effective clinical trick for evaluating this.

Ask the patient to bend over at the waist.

If they experience a sudden focal worsening of pain in their face when they lean forward, that is a classic indicator of sinusitis.

Moving down to inspect the mouth, we always start anteriorly with the lips, checking their color, moisture, and looking for any cracking or lesions.

This is another area where understanding racial variations is vital.

Absolutely.

All racial groups have lips that are deeper or pinker in color than their surrounding facial skin.

However, some African -American patients normally have a dark bluish line along their gingival margin, the gum line.

You must recognize this as a normal variation in this population, but not in everyone.

Right.

If you observe a dark line on the gingival margins in other populations, it is an alarming finding that often indicates heavy metal toxicity, such as lead or bismuth poisoning.

Inside the mouth, you continue by inspecting the condition of the gums and counting the teeth, expecting to find 32 permanent teeth in an adult.

The mouth exam is also where we actively assess several major cranial nerves.

When we look at the back of the throat, we ask the patient to say,

ah, we aren't just doing that to get a better view, we're watching the soft palate and the uvula.

You wanna see the soft palate and the uvula rise symmetrically in the midline.

This action directly tests cranial nerve 10, the vagus nerve.

If there is damage to this nerve, the uvula will deviate off to one side rather than rising straight up.

Later in the exam, you test cranial nerve 12, the hypoglossal nerve, by asking the patient to simply stick their tongue out.

It should protrude perfectly in the midline.

And if it doesn't.

If there is damage to cranial nerve 12, the tongue will actually deviate toward the paralyzed side.

That is a classic high -yield concept for your board exams.

Let's talk about inspecting those tonsils.

Yeah.

When we look at them, we need a standardized way to objectively document their size.

How do we grade them?

We use a very specific four -point grading scale.

A grade of one plus means the tonsils are just barely visible behind the pillars.

A grade of two plus means they extend halfway between the tonsillar pillars and the uvula.

A grade of three plus means they are swollen enough to actually touch the uvula.

And a grade of four plus means they are so enlarged they are touching each other across the midline.

Picture a pediatric patient coming in with a severe sore throat and you see four plus kissing tonsils touching in the middle.

You immediately understand why they are refusing to eat or drink.

Their airway and swallowing path are severely obstructed.

Exactly.

You also have to know what is considered normal on that scale.

Seeing one plus or even two plus tonsils is perfectly normal in healthy individuals.

It is especially common in children because their lymphoid tissue is proportionately enlarged until they reach puberty.

But three or four is an issue.

Yes.

Spotting three plus or four plus tonsils indicates a significant acute infection and you will almost certainly see bright red, swollen tissue covered in exudate.

And while your tongue blade is in the mouth, touching the posterior pharyngeal wall will elicit the gag reflex.

This is how you physically test cranial nerves nine and 10 together, the glossopharyngeal and vagus nerves.

Since we mentioned pediatric patients, we have to acknowledge that kids are notoriously difficult to examine in this area.

Bringing a wooden stick toward a toddler's face is a quick way to start a wrestling match.

If we connect this to the bigger picture of holistic patient care, forcing an exam causes unnecessary trauma and ruins the clinical trust you're trying to build.

Instead of reaching for the dreaded tongue blade right away, try making it a game.

Ask the young child to pant like a dog or open your mouth as big as a roaring lion.

That's so smart.

It works.

These actions naturally force the tongue to drop down and back, giving you a clear unobstructed view of the oropharynx without triggering an uncomfortable gag reflex or scaring the patient.

I love utilizing those kinds of clinical tricks.

We also need a reliable way to assess infant dental development.

There's a simple formula for calculating the expected number of deciduous or baby teeth in children younger than two years old.

You take the child's age in months and subtract six.

That number equals the expected teeth.

So a 12 -month -old infant should have roughly six teeth.

During that infant exam, you might also spot some unusual findings in the mouth that look alarming but are actually harmless.

For instance, you might see Epstein pearls.

Imagine a frantic parent pointing out tiny, whitish, pearly bumps on the roof of their newborn's mouth worried it's an infection.

Oh, wow.

As the nurse, you can calmly reassure them.

Those are just Epstein pearls,

small retention cysts that disappear completely on their own in a few weeks.

You might also notice a sucking tubercle, which is a small elevated pad in the exact middle of the upper lip caused by the constant friction of breastfeeding or bottle feeding.

Both are entirely normal physiological responses.

So what does this all mean?

We have our foundational anatomy.

We've gathered our subjective history and we've completed our objective physical exam.

Now, we have to synthesize this data through clinical reasoning and put it on paper safely and accurately.

We achieve this using structured charting, separating our subjective, objective, and assessment data.

For the subjective section, you document the patient's exact history.

Patient reports no history of nasal disperse or episaxis, states they experience mild colds one to two times a year.

Clear and precise.

For the objective section, you rely purely on the physical evidence you gathered.

Nairs patent bilaterally.

Nasal mucosa, pink and moist.

Tonsils surgically absent.

Uvula rises strictly in the midline on formation.

Finally, the assessment is your clinical conclusion based entirely on that synthesized data.

In this healthy example, you would write,

nose and oral structures intact and appear healthy.

Let's visualize a more complex clinical case study to see how this reasoning protects the patient.

Imagine a patient comes in reporting oral pain rated at a six out of 10, but they know the pain only happens when they are actively eating or drinking.

Crucially, during your subjective interview, the patient reveals they do not have dental insurance and haven't been able to see a dentist in over five years.

You take that subjective story and look for the objective evidence to confirm it.

You check their vital signs, they are normal.

You examine the ears, they are clear.

The oral mucosa is pink and the tonsils are a normal one plus.

But when you inspect the gums, they appear bright red and swollen.

You notice receding gingival margins along with visible heavy plaque and dark areas of decay on the teeth.

It paints a very clear picture.

Exactly.

The subjective history of lacking routine dental care perfectly explains the objective physical findings of severe gingivitis and dental caries.

That is the core of clinical reasoning, connecting the patient's lived experience to the physical evidence to direct safe, appropriate patient care and referrals.

We have covered an immense amount of ground today.

From the bleeding risks of the Kisselbach plexus to cranial nerve assessments to pediatric examination tricks.

But before we officially wrap up, we wanna leave you with one final thought to mull over before your clinical lab.

During your physical examinations, you will inevitably encounter patients with noticeable breath odor or halitosis.

Most of the time, this is benign, simply the result of poor oral hygiene, decaying food debris trapped between teeth or a heavily spiced diet.

But occasionally, halitosis is the very first clinical indicator of a much larger systemic disease.

It forces us to remember that the mouth is not an isolated disconnected cave.

It is a true physiological window to the rest of the body's overall health.

I encourage you to explore how serious metabolic conditions like diabetic ketoacidosis or deep respiratory infections can actually manifest as highly specific, identifiable breath odors.

That is a phenomenal reminder to always think holistically about the people you are treating.

You've got the foundational knowledge, you've got the examination skills, and you are gonna do absolutely amazing on your upcoming clinical assessments.

Thank you from the Last Minute Lecture Team, and we wish you the absolute best of luck.