Chapter 25: Male Genitourinary System

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Welcome to this deep dive.

If you are listening right now, consider this your personalized one -on -one tutoring session.

Yeah, we know you are a nursing student, you've probably got a massive exam looming, or maybe you're about to head into your clinical rotations.

And your palms might already be a little sweaty at the thought of doing a genitourinary assessment.

Take a deep breath.

We are here to help you absolutely master this material.

You can put down the highlighters, step away from the flashcards, and just listen.

Our mission today is to conquer chapter 25 male genitourinary system from your textbook Physical Examination and Health Assessment Ninth Edition.

Right, we are going to follow the exact logical flow of your text.

We'll take the foundational anatomy and show you exactly how it applies to the interview, the physical exam, and your clinical reasoning.

So before we even think about walking into a patient's room, we really have to visualize the blueprint, the anatomy and physiology.

Let's start with the penis.

Okay, the textbook describes it as having three cylindric columns of erectile tissue.

How should we picture that?

Think of it like a bridge support system.

You have two columns on top or the dorsal side called the corpora cavernosa.

And then one underneath.

Exactly.

Acting as the ventral foundation is a single column called the corpus spongiosum.

At the very tip, that corpus spongiosum flares out into a cone shape, which is the glands.

The glands, right.

And the ridge where the glands meets the main shaft is the corona.

You got it.

And running right through the center of that bottom column, the corpus spongiosum, is the urethra.

It's essentially a dual highway used by both the reproductive system and the urinary system.

That makes a lot of sense.

Then moving just below that, we have the scrotum, basically a loose, protective sac continuing from the abdominal wall.

Right.

But there's a very specific muscle in there that the textbook highlights,

the cremaster muscle.

I've always wondered about the clinical why behind how that muscle functions.

It is entirely about temperature control.

The cremaster muscle acts like an internal thermostat for the testes.

Its sole purpose is to keep the testes at exactly three degrees Celsius below the core abdominal temperature.

Wow.

Specifically three degrees.

That specific three degree difference is an absolute biological requirement for sperm to remain viable.

So if the ambient temperature is cold, the cremaster muscle contracts, pulling the sac up tight against the body to borrow body heat.

And when it's warm, the muscle relaxes, letting the sac hang lower to cool off.

Precisely.

Now inside that sac are the testes themselves, which produce the sperm.

But looking at the diagrams in the text, there's an obvious asymmetry.

Is it normal that one testes hangs lower than the other?

Completely normal.

The left testes sits lower than the right simply because the left spermatic cord is longer.

Good to know.

And once sperm is produced in the testes, it doesn't just immediately leave the body, right?

No, it moves into the epididymis.

Picture the epididymis as a tightly coiled, incredibly long duct system resting on top of the testes.

It serves as the main storage warehouse for sperm.

Okay.

A storage warehouse.

Right.

When it's time for the sperm to travel, it moves from that warehouse into the vasta ferns, traveling up through the spermatic cord.

And that spermatic cord has to eventually travel back into the body, which brings us to the inguinal area, the groin.

The textbook puts a huge emphasis on the landmarks here.

It really has.

You've got the inguinal ligament, the inguinal canal just above it, and the femoral canal just below it.

Why does a nurse need to know the exact geography of these canals?

Because those canals are essentially structural weak spots in the abdominal musculature.

Weak spots.

Yeah.

When a patient puts excessive pressure on their abdomen, say by heavy lifting or extreme straining, a loop of their bowel can actually push right through those weak spots.

That is what a hernia is.

Oh, I see.

So if you don't know exactly where those canals are, you won't know where to palpate to check for that protruding bowel.

Exactly.

You have to know the map.

Let's shift from the static anatomy to how this system changes over the lifespan, starting at the very beginning with infants.

Prenatally, the testes actually develop way up in the abdominal cavity and slowly migrate down.

By the time a baby is born, they should be fully descended into the scrotum.

And the textbook notes, they measure about 1 .5 to 2 centimeters long at birth.

Right.

But looking at the adolescent section, there is a massive evidence -based shift regarding when puberty begins.

Yeah.

The current data might surprise you.

Puberty is starting significantly earlier than historical norms.

It really is.

On average, it begins at age nine for African -American boys and age 10 for Caucasian and Hispanic boys.

The very first physical sign is always the enlargement of the testes, right?

Yes, followed by the appearance of pubic hair and then an increase in penis size.

In practice, you will document these stages using Tanner's sexual maturity ratings or SMRs.

Age nine seems incredibly early.

I mean, I'm just thinking back to being nine years old, probably still playing with action figures.

How does a nurse even begin to navigate that?

That is exactly the clinical insight the textbook wants you to grasp.

Just because a young boy has reached physical maturity earlier, it does not mean his brain has reached emotional or psychological maturity.

That is a really important distinction.

As a nurse, you are not just assessing Tanner's stages.

You have to help this child navigate complex bodily changes and behaviors that they might not be emotionally ready for.

Now, as these young patients grow, they're also developing their sexual orientation and gender identity.

This is a crucial part of the assessment.

The text is very firm on a golden rule for clinical practice here.

You cannot make assumptions based on how a patient looks, dresses, or talks.

Never.

You will frequently see the acronyms SGM, meaning sexual and gender minority, and MSM, meaning men who have sex with men.

And MSM is a broad umbrella.

It includes gay men, bisexual men, and even men who identify as straight but have sexual encounters with men.

And there is a fascinating statistic in the text about this.

A national study of emergency departments revealed that nearly 80 % of clinicians assumed their SGM patients would be offended or refused to share their sexual orientation.

80%.

Yeah.

But when they actually ask, only 10 % of patients declined to answer.

Wow, that's a huge disconnect.

The overwhelming majority of patients are perfectly willing to discuss their lives if you provide a welcoming, private, and strictly confidential setting.

You have to ask because knowing their specific practices allows you to targeted, much -needed healthcare screenings.

Jumping to the other end of the lifespan,

aging adults.

Unlike women who go through menopause, men do not have a hard stop on fertility.

Right.

Sperm production drops off around age 40, and testosterone begins a very slow decline after 30.

But the talkbook highlights a major, very common change here, benign prostatic hyperplasia, or BPH.

This affects 80 % of men over the age of 60.

It is vital to reassure your patients that BPH is a benign overgrowth of tissue.

It is not prostate cancer.

That's a huge relief for patients to hear.

Absolutely.

However, because the prostate gland wraps around the urethra like a donut when that tissue swells, it squeezes the urethra.

It creates a mechanical plumbing issue.

Exactly.

Leading to an obstructed urine stream.

And importantly, the text notes that neither chronologic age nor BPH should put an end to a patient's sex life.

Right.

In the absence of disease or side effects from medications like certain blood pressure drugs,

sexual expression naturally continues well into later life.

Before we move on to the interview process, we need to touch on genetics and environment.

A major discussion point in this chapter is circumcision.

The text defines this as an elective surgical metaplasia, which simply means the surgical removal and alteration of that specific foreskin tissue.

What is the clinical data behind this procedure?

The textbook presents concrete data, particularly from Sub -Saharan Africa, showing that circumcision reduces the risk of a male acquiring HIV from an infected female partner by 60%.

60 % is significant.

It is.

It also significantly lowers the risk of urinary tract infections in infants.

But your role as a nurse is crucial here.

This is a non -therapeutic surgery with minor risks, and some cultures or families consider it entirely unnecessary.

So your job is to present the unbiased medical risks and benefits, step back and completely respect whatever decision the family makes.

Exactly.

Another major environmental factor is chronic kidney disease or CKD.

The text states that 9 out of 10 adults who have CKD don't even know it.

9 out of 10.

Why is that?

Usually because the early stages have zero symptoms.

And then there is bladder cancer, which is the fourth most common cancer in men.

A staggering 50 % of the risk for bladder cancer is directly tied to smoking.

The very first warning sign a patient might notice is painless hematuria, which is just blood in the urine without any burning or discomfort.

The text also draws attention to a very important demographic reality regarding both CKD and bladder cancer.

Yes.

Marginalized groups experience much higher rates of these diseases and significantly worse clinical outcomes.

And the textbook explicitly states this disparity is driven by social constructs, like a lack of health or an inability to access preventative care or not by biological differences.

That is a vital point to remember for clinical practice.

And lastly, for this foundational section,

sexually transmitted infections.

There are 20 million new STI cases every single year in the U .S.

And half of those occur in young people aged 15 to 24.

The textbook states this requires nurses to dedicate 30 minutes or more to behavioral counseling with sexually active youth.

So having all of this foundational anatomy and data in your head is great, but how do you actually get a patient to open up about their plumbing?

That takes us into subjective data collection, the health history interview.

For an adult patient, you have to be direct about urinary symptoms.

You're asking about frequency, how often they go, urgency, do they feel like they can't wait?

Right.

And nocturia, are they waking up in the middle of the night to pee?

And dysuria, is there any burning or pain?

You also want to ask about hesitancy or straining to start the stream, which as we just discussed is a massive clue pointing toward BPH in older men.

You also must ask about the color of their urine.

We mentioned hematuria with bladder cancer.

Blood in the urine is a universal danger sign that always warns further investigation.

When moving to the genital history, your tone is everything.

Use matter of fact objective language.

Ask directly about penile pain, any new lesions, abnormal discharge, scrotal lumps, and their history of STI contact.

If you act like it's a routine checklist, the patient will create it like a routine checklist.

There are some specific developmental variations in the interview too.

For infants and kids, you are asking the parents about toilet training.

Just a heads up, nocturnal inuresis or bed wetting is only considered a clinical issue after the child is five or six years old.

But the textbook gives a massive bold print safety warning for uncircumcised infants here.

Yes, never under any circumstances forcibly retract the foreskin of an uncircumcised infant.

Never.

At birth, there are normal tissue adhesions holding that foreskin in place.

If you force it back, you will tear those adhesions and cause severe pain and scarring.

You also need to use the interview to screen for child sexual abuse.

You do this by teaching the child about body safety and ensuring they can name three trusted adults they would feel safe talking to if someone crossed a boundary.

What about interviewing teenagers?

I imagine a 14 -year -old boy is not going to be thrilled to talk to a nurse about his genitals.

That's where two specific communication techniques come in.

First, use a permission statement.

Start by saying, often, boys your age experience.

Which immediately normalizes whatever you're about to say.

Exactly.

Second, use the ubiquity approach.

Instead of asking a yes or no question like, do you do this?

You ask, when did you first notice this?

It implies the behavior or symptom is so universal that everyone does it.

This is incredibly helpful for asking about nocturnal emissions or wet dreams.

A lot of boys feel intense guilt about this or mistakenly believe they've caught an STI, so normalizing it is a huge relief for them.

For aging adults, you are screening for incontinence issues and any changes in erectile function.

It is important to validate that desiring an erection is totally normal at their age.

And that erectile dysfunction is frequently treatable.

Often it's just a frustrating side effect of their other daily medications like antihypertensives for blood pressure.

All right.

This brings us to the part of clinicals that every nursing student sweats over.

The physical exam itself.

It is completely normal to feel apprehensive about performing a male genitourinary assessment, but your demeanor dictates the patient's comfort.

You most project confidence.

Be relaxed, unhurried, and business -like.

And importantly, do not try to make small talk about their sexual practices while you are actively performing the physical exam.

Save that for the interview.

Exactly.

When you actually begin the exam, your touch needs to be firm and deliberate.

Tentative light touching can actually cause a ticklish response or unwanted stimulation.

Lead with the back of your hand.

Now, let's address the elephant in the room.

What happens if the patient gets an erection during the exam?

Do not panic.

The textbook gives you the exact script.

You just say, this is only a normal physiologic response to touch, and you calmly proceed with the assessment.

When you inspect and palpate the penis, if the patient is uncircumcised, you will ask them to retract the foreskin or you will do it gently.

Finding a cheesy whitish substance called smegma underneath is a completely normal hygiene finding.

You also gently compress the glands to check if any unexpected discharge comes out of the urethra.

Moving to the scrotum, we established that asymmetry is normal.

You might also notice yellowish nodules on the skin of the scrotum, about one centimeter large.

These are called sebaceous cysts, and they are also a totally normal benign finding.

When you actually palpate the testes inside the sac, what exactly are you feeling for?

You are feeling for a specific texture.

A normal, healthy testes should feel smooth, firm, and rubbery.

The textbook compares the sensation to feeling a peeled, hard -boiled egg.

You will also palpate the spermatic cord all the way up to the inguinal ring.

Speaking of the inguinal ring, how do we assess for those hernias we talked about earlier?

You ask the patient to bear down like they are having a bowel movement while you gently pocket up into the inguinal canal.

The canal should feel like a small triangular slit.

And if they have a hernia?

When they bear down, you will feel a distinct bulge of tissue tap against your finger.

For the femoral area lower down, the text gives you the mnemonic navel to map the anatomy from lateral to medial.

Nerve, artery, vein, empty space, lymphatics.

Right.

You physically locate the femoral artery pulse with your index finger, and that empty space where a hernia could protrude is right under your fourth finger.

Now, what if you were palpating the scrotum and you feel a mass that isn't supposed to be there?

That is when you perform transillumination.

You darken the exam room and press a strong flashlight right up behind the scrotal sac.

If the mass is filled with serous fluid like a hydrocell, it will transilluminate, meaning you'll glow with a pink or red light.

If the mass is solid tissue or blood, which could indicate a hernia, a tumor, or an infection, it will not glow at all.

Before we love the objective data, let's quickly hit the urinary function labs you will be monitoring.

A normal urinalysis has a pH between 4 .5 and 8 .0 and a specific gravity between 1 .003 and 1 .030.

You also look at kidney function.

Normal creatinine is 0 .7 to 1 .5, and blood urea nitrogen, or BUN, should sit between 10 and 20.

And one critical safety note for the infant physical exam.

We talked about the cremaster muscle pulling the tests up when it's cold.

In infants, this cremaster reflex is incredibly strong.

When you palpate an infant scrotum, you must first block the inguinal canals with your thumb and forefinger.

Because if you don't block the exit, the reflex will instantly pull the testes right back up into the abdomen, making them impossible to assess.

Exactly.

Let's pull all of this together.

We have the anatomy, the interview, and the exam.

How do we apply clinical reasoning to everything we just found?

A massive part of this is health promotion, specifically teaching the testicular self -examination, or TSE, to every male patient from age 13 upward.

The textbook uses the mnemonic T -S -E to teach this.

T stands for timing.

It should be done once a month.

S stands for shower.

Warm water relaxes the scrotal sac, making it easier to feel abnormalities.

And E stands for examine, checking for any changes in how the tissue feels.

The goal here isn't to terrify the patient about cancer.

The goal is body familiarity.

Testicular cancer is actually quite rare, but it primarily strikes young men between the ages of 15 and 35.

The good news is that if it is found early, it has nearly a 100 % cure rate.

Another key piece of clinical reasoning is accurate documentation.

The textbook highlights this by contrasting two major case studies that look somewhat similar, but have vastly different outcomes.

The first is epididymitis.

With epididymitis, which is an infection of that sperm storage warehouse we talked about, the patient presents with gradual, severe pain.

The scrotum is swollen,

but the pain is somewhat relieved if you physically elevate the scrotum.

They will usually have a fever, and their urinalysis will show white blood cells, indicating infection.

Now contrast that with testicular torsion.

The presentation is completely different.

The pain is sudden and extrusiating.

It often happens in the middle of the night and wakes the patient out of a dead sleep.

There is no fever.

And critically, if you test the cremasteric reflex on that side, it will be completely absent.

I cannot stress this enough.

Testicular torsion is a massive medical emergency.

The spermatic cord has physically twisted, cutting off the arterial blood supply to the testes.

The tissue can become gangrenous in a matter of hours.

It requires immediate emergency surgery to save the organ.

Let's slow down and run through some other abnormal findings.

The what -ifs of the exam.

Let's start with urine color.

It's a huge diagnostic clue.

Red urine can indicate blood from cancer, kidney stones, or trauma.

Tea -colored urine is a classic sign of liver disease or jaundice.

And cloudy urine almost always suggests a urinary tract infection.

You also need to be able to visually differentiate between common genital lesions.

Tinea creris is your standard jock itch.

It's a fungal infection that forms a red, itchy patch in the curl fold of the groin.

HSV2, which is genital herpes, presents very differently.

You will see clusters of small, incredibly painful vesicles that eventually pop and form superficial ulcers.

Then you have genital warts caused by HPV.

These are painless, fleshy, soft papules that cluster together into a cauliflower -like patch.

This exact presentation is why nurses push so hard for young men to get the Gardasil vaccine.

And finally, syphilis.

This infection begins as a small, solitary, silvery papule that eventually erodes into a red, superficial but painless ulcer known as a chancre.

Looking at abnormalities of

paraphimosis.

Paraphimosis is when the foreskin is non -retractable.

It is stuck forward, covering the glands, and you can't pull it back.

Paraphimosis is the opposite, and it's much more dangerous.

The foreskin is retracted behind the glands, but it gets stuck there and acts like a rubber band, strangulating the tissue.

That is a medical emergency because it compromises blood circulation.

You also need to check metis locations.

Hypospadias is a congenital defect, where the urethral opening is on the ventral or underside of the penis.

Hypospadias is when the opening is on the dorsal or upper side.

Lastly, let's identify three abnormal masses you might feel in the scrotum.

First, a varicose.

This is caused by dilated varicose veins in the spermatic cord, and it feels distinctly like a bag of worms when you palpate it.

Second, a spermatocele.

This is a painless retention cyst filled with milky fluid, usually located just above the testes.

And third, the hydrosil, which we mentioned during our transillumination discussion.

This is a cystic collection of serious fluid surrounding the testes that will glow with a pink or red light when you shine a flashlight through it.

You made it.

Take a breath.

Let's quickly trace the line of what we just accomplished.

By mastering the foundational anatomy, the columns, the canals, the lifespan changes,

you gave yourself the tools to conduct a thorough targeted interview.

Earning that subjective data set you up to approach the physical exam with confidence.

And knowing the difference between a normal hard -boiled egg testes and a bag of worms, varicose cell gives you the exact objective data you need for accurate clinical reasoning.

Which leads to impeccable documentation and ultimately safe patient care.

As we wrap up this deep dive, I want to leave you with a broader concept to ponder.

We talked earlier about the textbook's powerful note regarding chronic kidney disease and bladder cancer.

How marginalized groups suffer disproportionately worse outcomes due to social constructs like lack of insurance rather than biological differences.

As you pull on your scrubs and head into clinicals, consider this.

How much of what we diligently memorize as textbook pathology in nursing is actually just the physical manifestation of systemic social inequality?

Something crucial to keep in the back of your mind as you treat your future patients.

You are going to do great.

Good luck on your exams and in your rotations.

Thank you for listening and a warm sign -off from the Last Minute Lecture Team.

See you next time.