Chapter 6: Substance Use Assessment

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Welcome to our latest deep dive.

If you are a nursing student gearing up for exams or maybe you're stepping onto the floor for your very first clinicals, you are in exactly the right place.

This is really harsh.

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

Today, our mission is to do a complete deep dive into Chapter 6 of Physical Examination and Health Assessment, the ninth edition.

The gold standard.

Exactly.

We are focusing entirely on substance use assessment.

And just a quick note before we jump in.

As we discuss public health crises and demographic data pulled straight from the text, we're strictly reporting the source material impartially.

We aren't taking any political sides here.

We're just giving you the clinical facts as they're presented in the book so you can ace your exams and safely care for your patients.

That is a great way to set the stage.

And to make sure you are totally prepared, we're going to walk through this chapter in its exact order.

Step by step.

Right.

We'll start with the foundational concepts of substance use.

Move into how to conduct those crucial patient interviews and then transition right into objective data and abnormal clinical findings.

By the time we're done, the entire logic of the clinical assessment process is just going to click perfectly into place for you.

It really will.

I love that.

So let's start with the reality of what a nurse actually sees on shift.

Part one, the foundational concepts.

When we talk about substance use, my mind immediately goes to alcohol because it's just it's everywhere in our culture.

But how pervasive is it really from a clinical standpoint?

It is incredibly pervasive.

I mean, the research in the text shows that nearly 70 % of adults age 18 and older reported drinking in the past year.

Wow.

70%.

Yeah.

And a major factor you have to consider now is the COVID -19 pandemic.

It caused a massive spike in consumption between 36 % and 60 % of people reported an increase in their drinking during that time.

Over half of people increasing their intake in some of those metrics.

That's a staggering jump.

But drinking is a pretty broad term.

I might have one glass of wine at dinner while someone else might have, you know, six beers at a tailgate.

How does the clinical world define when drinking becomes an actual medical concern like binge drinking?

It really comes down to volume over time.

For women, binge drinking is defined as consuming four or more drinks in two hours.

For men, it's five or more drinks in that same two hour window.

As a nurse, you need to understand the gravity of this.

Mortality data reflects these habits.

Alcohol is the third leading cause of preventable death in the U .S.

Third leading cause.

That's heavy.

It is.

But beyond just the alcohol itself, you have to watch out for alcohol interactive medications.

Right.

Because patients don't always realize that the, you know, the pill they took this morning might react terribly with the drink they have tonight.

Exactly.

Almost 90 % of adults aged 65 and older take at least one prescription.

Mixing alcohol with central nervous system depressants like opioid pain relievers or benzodiazepines creates a severe risk for adverse drug reactions.

Because it depresses the respiratory system.

Yes, it depresses the respiratory system and it can be fatal.

Okay, wait.

If a patient comes into the clinic and tells me they only had, quote, one drink, my instinct is just to document that and move on.

Why do I need to cross -reference that with table 6 .1, the what is a standard drink chart?

Because one drink is completely subjective to the patient.

You need an objective baseline.

Makes sense.

A standard drink in the U .S.

is strictly defined as 14 grams of pure alcohol.

14 grams?

Right.

That translates to 12 ounces of regular beer, 5 ounces of wine or 1 .5 ounces of 80 proof spirits.

Okay, I see.

So if a patient says, I just had one drink, but their one drink was actually a 40 ounce malt liquor, they aren't having one standard drink.

Not even close.

If you do the math using that baseline,

a 40 ounce malt liquor is actually about 4 .5 standard drinks.

Geez.

Yeah.

If you just write down one drink without calculating the standard baseline, your entire assessment is skewed.

Accuracy is everything.

That is a massive difference.

Now the text makes an important shift from alcohol to illicit drugs.

It notes that about 21 .4 % of Americans 12 or older report using illicit drugs in the last year, with marijuana being the most commonly used.

Right.

But the critical public health crisis we're facing right now is the opioid epidemic.

It's a devastating crisis.

More than 130 people die each day due to opioid overdoses in the United States.

And the source of these drugs often surprises people.

Yeah.

Let's talk about figure 6 .2.

Figure 6 .2 breaks down where people are getting these prescription pain relievers.

This is the part that totally blew my mind.

You picture back alley deals, but the data says over 50 % of people who misuse prescription opioids get them from a friend or relative for free.

Free from a friend or relative?

Not a drug dealer.

Only about 6 % buy them from a dealer, and over 35 % get them from a single doctor's prescription.

Which fundamentally changes how you assess risk.

The drugs are sitting right there in the family medicine cabinet.

The text also notes that as prescription opioids become harder to obtain, about 4 % to 6 % of people transition into heroin simply because it's cheaper.

And more recently, synthetic opioids like fentanyl have flooded the market.

And fentanyl is so lethal.

Incredibly potent.

Overdoses involving it are much harder to reverse because of the severe respiratory depression it causes.

This is heavy stuff, but it's the reality of the job.

So we know what substances are out there, but how do we diagnose the disorder itself?

That brings us to part 2.

Clinical

We have to understand addiction not as a moral failing or a lack of willpower, but as a chronic brain disease.

That is the foundation of compassionate nursing.

The path of physiology is rooted deep in the brain's reward circuits.

How so?

Well, when a person uses a substance, it activates these circuits by releasing dopamine, which creates an intense feeling of pleasure.

But with continued use, the brain tries to adapt.

Those reward circuits desensitize.

Meaning they don't feel pleasure from normal, everyday activities anymore.

Right.

And cravings take over, often triggered by simple environmental cues.

Over time, the executive function in the prefrontal cortex, the area of the brain responsible for decision making and impulse control, is physically altered.

So it's an actual structural and chemical change.

Yes.

That altered brain chemistry is why repeated relapse occurs.

It's not a choice.

It's a physiological response.

So to formally diagnose this, a nurse uses the gold standard laid out in Table 6 .2, the DSM -5 -TR Diagnostic Criteria for Alcohol Use Disorder.

The DSM -5 -TR, exactly.

The book lists 11 specific criteria, and you apply them based on the patient's behavior over a 12 -month period.

You're looking for things like taking the substance in larger amounts than intended, unsuccessful efforts to cut down, tolerance, withdrawal, and a failure to fulfill major role obligations at work or school.

But how does a nurse actually score this?

You tally up how many of those 11 criteria the patient meets, and that determines the severity scale.

You definitely need to know this for your exams.

Okay, lay it out.

If a patient meets two to three symptoms, it is classified as a mild disorder.

If they meet four to five, it is moderate.

And six or more symptoms is severe.

Got it.

Two to three is mild, four to five is mild, six plus is severe.

But obviously not everyone who has a few drinks develops a severe disorder.

Genetics and environment have to play a huge role here.

A massive role.

The text mentions that childhood trauma, poverty, and severe mental illness significantly increase the risk.

And Chapter 6 zeroes in on a specific demographic you need to be aware of.

Sexual and gender minority, or SGM, populations.

This is a vital area of culturally competent care.

SGM individuals are 1 .5 to 3 times more likely than their cisgender and heterosexual peers to be diagnosed with an alcohol use disorder.

And they're also more likely to use illicit drugs.

And the text explains why, right?

Yes.

The research points out that this is largely a coping mechanism for the stigma and minority stress they experience in daily life.

And the really frustrating part is the lack of tailored care.

The book notes that up to 71 % of addiction centers that claim to offer SGM tailored interventions actually don't have anything specific for them, which just leads to mistrust in the medical system.

It's a huge barrier.

As a nurse, you have to be aware of this disparity to provide appropriate supportive care without bias.

Absolutely.

Now, let's look at how all of these assessments change across the lifespan in Part 3.

Developmental competence.

A nurse's patient load isn't just adults.

The math totally changes when you look at a developing brain.

Let's start with adolescents.

The data says over 6 % of 12 to 17 year olds have a substance use disorder.

Why are teenagers so vulnerable?

Think of the adolescent brain like a sports car.

A sports car?

I like that.

The reward center, the part that seeks thrills and dopamine, is the gas pedal, and it is fully installed and heavily weighted.

But the prefrontal cortex, the logical decision -making center that acts as the brakes, is still on backorder.

Brakes are on backorder.

That's a perfect analogy.

Because of this neurological mismatch, teenagers are biologically wired to engage in risky behaviors without considering the long -term consequences.

And a massive risky behavior right now is e -cigarettes, or vaping.

Yes.

They're marketed to teens as a safer alternative, but they are absolutely not.

One JUL pod contains the exact same amount of nicotine as 20 traditional cigarettes.

20 cigarettes in one pod.

Plus, the high temperatures of vaping devices can deliver intense doses of drugs like marijuana, and marijuana has severe cognitive impacts on that developing sports car brain, impairing learning, problem -solving, and coordination.

Moving along the lifespan, we must discuss pregnancy.

The clinical rule here is absolute and non -negotiable.

There is no safe time and no safe amount of alcohol to consume during pregnancy.

Period.

End of sentence.

Period.

Alcohol easily crosses the placenta.

A dose that an adult liver easily metabolizes is highly toxic to a fetus.

It leads to fetal alcohol spectrum disorder, or FASD, which causes permanent physical learning and behavioral problems.

And the opioid epidemic touches this population, too.

7 % of pregnant people use a prescription opioid, and 20 % of those misuse them.

This leads directly to neonatal abstinence syndrome.

What does that actually look like for a nurse working in the NICU?

Neonatal abstinence syndrome, or NAS, occurs when the newborn goes through physical withdrawal symptoms right after delivery because they are no longer getting the drug through the placenta.

Oh, that's heartbreaking.

It is.

The infant might have tremors, high -pitched crying, sleep problems, and feeding difficulties.

It increases the infant's suffering and requires intensive, prolonged hospital care.

Finally, we have to look at the aging adult.

By 2034, adults over 65 will outnumber children for the first time in history.

How do the physiological changes of aging impact substance use?

As we age, our liver metabolism decreases, kidney function declines, and our body loses water and muscle mass.

So because they have less body water to dilute the alcohol and a slower liver to process it, the alcohol stays in their bloodstream longer and at much higher concentrations.

Precisely.

A single glass of wine hits a 75 -year -old much harder than it hits a 25 -year -old.

Because of this, even smaller amounts of alcohol significantly increase an older adult's risk for cognitive decline,

toxic interactions with their polypharmacy regimen, and falls.

And as any nurse knows, a fall in an older adult can be a life -altering or even fatal event.

Absolutely.

Okay, so we understand the what, the why, and the who.

Let's talk about the how.

Part four, subjective data collection.

This is where you, the nurse, are actually standing at the bedside conducting the interview.

Setting the stage here seems vital.

It's the most important step.

If a patient is currently intoxicated or actively going through withdrawal,

your history data will be completely unreliable.

You must wait until they are sober.

Makes total sense.

And you have to ask these deeply personal questions in a setting that is private, confidential, and totally non -confrontational.

I can imagine.

You don't want to be asking about illicit drug use while their boss or their mother is sitting in the visitor chair.

Once the stage is set, you need screaming tools.

And I have to say, the medical community's obsession with forcing acronyms to work is fully on display here.

Let's break down the big ones from table 6 .3.

First up is the IUDIT, the alcohol use disorders identification test.

The IUDIT is your comprehensive 10 question tool.

It covers three domains,

alcohol consumption, drinking behavior or dependence, and adverse consequences from alcohol.

What makes it so effective?

It's a fantastic tool because it's relatively free of gender and cultural bias.

A score of 8 to 14 means hazardous drinking, and 15 or indicates alcohol dependence.

But if you're working in a fast -paced, acute, or critical care unit, you don't always have time for 10 questions.

That's where the IUDC comes in.

It's just the first three questions of the full IUDIT.

It takes less than two minutes, and it specifically tests for heavy, at -risk drinking.

Yes, it's very efficient.

Then there's the CAGE questionnaire.

C -A -G -E.

Cut down, annoyed, guilty, eye -opener.

It takes less than a minute to ask these four yes or no questions.

True.

And answering yes to two or more of the CAGE questions signals possible alcohol abuse.

However, the text explicitly warns nurses that while CAGE is incredibly quick, it's less effective for detecting low but risky drinking, and it is significantly less effective for women and minority groups.

Which is exactly why the TWEAK questionnaire exists.

TWEAK is specifically designed to screen women, especially pregnant individuals.

It stands for tolerance, worry, eye -opener, amnesia, cut down with a K.

See what you mean about forcing the accuracy.

Right, but there's a crucial clinical pearl here regarding the tolerance question.

If a woman says it takes three or more drinks to make her feel high, that equals tolerance and automatically scores two points.

A total score of two or more points on the TWEAK means a drinking problem.

And for your older adult patients, you turn to table 6 .4, the SINGTJG, the Short Michigan Alcoholism Screening Test, geriatric version.

Another acronym.

Of course.

This is 10 yes or no questions tailored specifically to the emotional and physical reactions older adults have to alcohol.

Scoring two or more yes responses indicates an alcohol problem.

Okay, so you've screened them in a private setting.

The score indicates a problem.

Now what?

You can't just say, well, good luck with that.

You have to advise and assist.

Yes, you have a clinical duty.

The textbook actually gives you the exact scripting to use for a brief intervention so you maintain a supportive but clear clinical boundary.

You look at the patient and state,

I strongly recommend that you cut down and I'm willing to help.

And if they have a severe disorder?

If you determine they have a severe disorder, the script is, I believe that you have an alcohol use disorder.

I strongly recommend that you quit drinking and I'm willing to help.

That direct objective approach is essential.

You're removing judgment and offering a clear medical recommendation.

And speaking of objective, that leads us perfectly into part five.

Objective data collection.

Transitioning from what the patient says to what their body shows us.

Exactly.

Through clinical laboratory findings.

Translating lads to lifestyle.

Let's unpack the alphabet soup of these biomarkers.

There are a few key ones you'll see on patient charts.

First is GGT or gamma glutamyl transferase.

Occasional drinking won't raise this, but chronic heavy drinking will.

It's real clinical value though is detecting relapses in alcohol dependent people who are in recovery.

A sudden spike in GGT means a probable relapse.

Next is CDT or carbohydrate deficient transferrin.

And CDT is used a bit differently, right?

Yes.

Healthy women naturally have higher CDT levels than men, so to improve accuracy, CDT is usually used alongside GGT.

Then we have AST, aspartate amino transferase, which is an enzyme found in the heart and liver that gets elevated from months of chronic drinking.

And from the complete blood count, there's MCV, mean corpuscular volume, which measures red blood cell size.

Heavy drinking for four to eight weeks increases MCV, but it isn't sensitive enough to be used all by itself.

It's an indicator, but not definitive alone.

But if I'm a nurse and I want the MVP of biomarkers, the gold standard, what am I looking for?

You're looking for PETH, phosphatidyl ethanol.

It is a and specific direct serum biomarker.

Unlike the others we just mentioned, PETH is produced only in the presence of alcohol, and it is so sensitive it can detect even just one to two standard drinks.

Wow.

Just one or two.

Yeah.

Because it stays in the blood for weeks, it is the absolute gold standard for evaluating abstinence and sober living.

And we can't forget breath alcohol analysis, the classic breathalyzer.

This correlates with alcohol concentration or BAC.

Just a quick reminder, a BAC of 0 .08 % is the threshold for legal intoxication in most states, which is roughly equivalent to three standard drinks and comes with a loss of balance and motor coordination.

All of this objective data brings us to our final section, part six, abnormal findings and safe patient care.

This is where your assessment skills directly dictate life -saving interventions at the bedside.

Let's set the scene.

You have a patient admitted to your med -surg floor.

A day goes by and they begin experiencing alcohol withdrawal.

To keep them safe and figure out how much medication they need, you use the tool found in table 6 .5, the CIWAR scale, the Clinical Institute Withdrawal Assessment.

The CIWAR scale is the most sensitive tool for objective measurement of withdrawal.

It prevents you from over -medicating the patient while making sure you intervene before they progress to life -threatening complications.

What are we assessing here?

There are 10 criteria you must assess.

Rather than just memorizing a list, it helps to group them.

You're looking for signs of autonomic hyperactivity like nausea, sweating, and tremors.

Okay, the physical signs.

Right.

Then you're looking for neurological and psychological disturbances like anxiety, agitation, headache, orientation issues, and tactile, auditory, or visual disturbances.

So you take their titles, assess those group criteria, and tally up the score.

If the score is under 8, they have absent or minimal withdrawal.

You don't medicate.

You just monitor them by repeating the assessment every four hours.

But what happens if the score spikes?

If that score hits 15 or higher, that triggers scheduled medications.

At a score of 15 or above, the patient is in severe withdrawal,

and appropriate pharmacotherapy is absolutely mandatory.

And if you don't intervene?

If you

don't, you're out.

Finally, let's look at table 6 .6.

Clinical signs of substance use disorders.

You need to be able to look at a patient's clinical appearance and know the difference between intoxication and withdrawal across different classes of drugs.

Let's anchor these in your memory.

For alcohol and sedatives like benzodiazepines, intoxication looks like slurred speech and an unsteady gait.

But withdrawal from alcohol or sedatives features that autonomic hyperactivity we just talked about, cacocardia, sweating, and can progress to grand mal seizure.

So that's the one that can kill you.

Exactly.

Remember, withdrawal from alcohol and sedatives is uniquely life -threatening.

Opiates are a different story.

Heroin, morphine, fentanyl.

Intoxication gives you pinpoint pupils, decreased blood pressure, and lethargy.

But opiate withdrawal.

The textbook says it essentially mimics a severe case of the flu.

Runny nose, tearing up, fever, muscle, and joint aches, and sweating.

And then you have stimulants like cocaine and amphetamines.

Intoxication means pupillary dilation, tachycardia, pacing, and severe psychomotor agitation.

But the withdrawal from stimulants results in a severe dysphoric crash.

The patient will present with extreme fatigue, depression, irritability, and either insomnia or hypersomnia.

That is an incredible amount of critical information mapping chapter 6 exactly as you need it for your exams.

You now have the foundations, the interview skills, the labs, and the abnormal findings.

Before we wrap up, here's something provocative to mull over that the chapter hints at but doesn't fully answer.

As synthetic drugs evolve faster than our textbooks can even print them, with dangerous adulterants like xylazine now entering the illicit supply, how will the clinical biomarkers we rely on today adapt?

That's a great point.

Will breathalyzers and standard blood draws be enough in 10 years?

Or will nursing assessment have to become entirely symptom -based as the chemistry of addiction outpaces our lab panels?

It is a huge challenge for the next generation of nurses.

That is a fascinating question and exactly why mastering these foundational assessment skills now is so vital.

You need to know what a baseline looks like before you can spot the anomalies.

Thank you so much for joining us for this deep dive into chapter 6.

Best of luck on your upcoming exams and in your clinicals.

You're going to do great.

A warm encouraging thank you from the Last Minute Lecture team.

Keep studying and we'll see you next time.