| Course | NR 547 Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum |
|---|---|
| Week | 4 |
| Paper type | Rule out analysis |
| Length | About 1,120 words, 2 pages |
| Format | APA 7 student paper |
| School | Chamberlain University |
| Program | MSN, Psychiatric-Mental Health Nurse Practitioner (PMHNP) |
| Updated | September 2026 |
Free sample paper for NR 547 Week 4
Rule Out Analysis: Nine Medical and Substance Causes of Heavy Sleep, Low Mood and a Past Week of Elevated Energy in a 24-Year-Old, Each Carried to the Finding That Closes It
Student Name
College of Nursing, Chamberlain University
NR 547: Differential Diagnosis in Psychiatric-Mental Health Across the Lifespan
Instructor Name
Month Day, Year
Rule Out Analysis: Nine Medical and Substance Causes of Heavy Sleep, Low Mood and a Past Week of Elevated Energy in a 24-Year-Old, Each Carried to the Finding That Closes It
The Presentation
A 24-year-old doctoral student presents with an unbroken five weeks of low mood and lost interest, ten to eleven hours of sleep a night, greater appetite with a 3 kg weight gain, slowed thinking, fatigue, guilt and passive thoughts of not existing. A sibling describes a five-day period two summers ago of little sleep, rapid speech, many new projects and heavy spending. For 14 months the student has taken a friend's amphetamine tablets a couple of times a week, with four days of use in the first week of this episode and none since. Alcohol is four to six drinks on some weekend nights; cannabis a few times a year. No prescribed medications. No significant past medical history. This is the first presentation to mental health services.
Before a psychiatric diagnosis can be held with confidence, medical and substance-related causes that could produce either the depressive picture or the elevated period have to be considered and closed. The candidates below are ordered by what would be worst to miss, not by how likely each is.
Candidates Ordered by Danger
1. Intracranial lesion or neurological disease. Why plausible here: a first mood episode with slowed thinking can occasionally be an early sign of a brain lesion or demyelinating disease. What would confirm it: focal neurological signs, headache with new features, visual symptoms or seizures. What argues against it: a normal neurological examination, no headache, no visual or sensory symptoms, and a history of an earlier mood episode two years ago, which makes a new structural cause much less likely. Closed without imaging, with a plan to image if any focal sign appears.
2. Thyroid disease. Why plausible: hypothyroidism can cause low mood, fatigue, hypersomnia and weight gain, and hyperthyroidism can cause a picture resembling hypomania. The relationship between thyroid function and mood is well described (Hage & Azar, 2012). Check: thyroid-stimulating hormone. Result: 1.8 mIU/L, within the normal range. Closed.
3. Stimulant-induced mood disorder and withdrawal. Why plausible: this is the most important candidate in this history. Amphetamines can produce euphoria and reduced need for sleep, and the period after heavy use can produce fatigue, hypersomnia, increased appetite and low mood. Check: a dated, daily record covering the five weeks, plus a urine drug screen. Result: the timeline, built with the student using a calendar and lab messages, shows four days of use in the first week and none in the following four; the urine screen is negative for amphetamines. Withdrawal symptoms typically ease within days to a couple of weeks of stopping, whereas this episode has continued for four weeks without use. Closed as the cause of the current episode, though the use remains a problem in its own right.
4. Stimulant as the cause of the earlier elevated period. Why plausible: if the summer period occurred during stimulant use, it could not count as a hypomanic episode for diagnostic purposes. Check: dating the period against the start of stimulant use. Result: the student's camera purchase receipts and the sibling's photographs date the period to July two years ago; the student began using the friend's tablets 14 months ago, about six months later. The student denies any other stimulant, including cocaine or high-dose caffeine products, at that time. Closed, with the caveat that the student's recall of substance use two years ago cannot be verified independently.
Further Candidates
5. Anemia and iron deficiency. Why plausible: fatigue and poor concentration. Check: complete blood count and ferritin. Result: hemoglobin and ferritin normal. Closed.
6. Infectious mononucleosis or post-viral fatigue. Why plausible: common in this age group and causes hypersomnia and fatigue. What argues against it: no sore throat, fever or lymph node enlargement, no recent illness and normal blood count. Closed clinically.
7. Primary sleep disorder. Why plausible: hypersomnia is prominent. Narcolepsy or idiopathic hypersomnia could produce heavy sleep with unrefreshing waking, and obstructive sleep apnea causes daytime fatigue. What argues against it: excessive sleep began with the mood episode, not before; there is no cataplexy, sleep paralysis or sleep attacks; body mass index is 22 and there is no snoring. Closed for now, to be reconsidered if hypersomnia persists after mood improves.
8. Alcohol and cannabis. Why plausible: both can lower mood and disrupt sleep. Check: quantity and timing. Result: weekend alcohol at a level that is not trivial but not heavy enough to produce a continuous five-week depressive episode; cannabis a few times a year. Contributing but not causal. The student agreed to avoid alcohol during assessment.
9. Other medical and nutritional causes. Vitamin B12 deficiency, pregnancy and autoimmune disease were considered briefly. A basic metabolic panel and B12 level were normal; a pregnancy test was negative; there are no joint, skin or systemic symptoms to suggest autoimmune disease. Closed.
The Medication and Substance Pass
The student takes no prescribed medications and no over-the-counter products apart from occasional ibuprofen. No hormonal treatment, steroids, isotretinoin or sleep aids. The substance pass covered amphetamine, alcohol, cannabis, cocaine, energy drinks and caffeine tablets. Nonmedical stimulant use is common among college and graduate students (McCabe et al., 2005), which is why the timeline was built carefully rather than accepting the student's first summary.
What the Analysis Leaves Standing
No medical cause explains the current episode, and stimulant use is closed as its cause on the timeline and the negative screen. The earlier elevated period predates stimulant use by about six months. That leaves a primary mood disorder as the explanation, and the question the next analysis must decide is between major depressive disorder and bipolar II disorder. The closures above matter for that decision, because a hypomanic episode can only be counted if it was not caused by a substance or medical condition (American Psychiatric Association, 2022).
It is worth recording what this analysis did not do. It did not order brain imaging, autoimmune panels or a sleep study, because nothing in the history or examination called for them. A rule out analysis that tests everything would be expensive and would generate incidental findings; one that tests nothing would leave the psychiatric diagnosis resting on an assumption. The tests chosen were those the presentation invited, and each candidate not tested was closed on a stated clinical finding instead.
References
American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.). https://doi.org/10.1176/appi.books.9780890425787
Hage, M. P., & Azar, S. T. (2012). The link between thyroid function and depression. Journal of Thyroid Research, 2012, Article 590648. https://doi.org/10.1155/2012/590648
McCabe, S. E., Knight, J. R., Teter, C. J., & Wechsler, H. (2005). Non-medical use of prescription stimulants among US college students: Prevalence and correlates from a national survey. Addiction, 100(1), 96-106. https://doi.org/10.1111/j.1360-0443.2005.00944.x
Reading the NR 547 Week 4 instructions
This week asks you to consider and exclude medical and substance-related causes before settling on a psychiatric diagnosis. The prompt will likely request the presentation, a list of possible non-psychiatric causes, the assessment used to evaluate each and a conclusion. State the presentation neutrally, including onset, course and age at first episode, before any label. Order candidates by what would be worst to miss, not by likelihood. For each, explain why it is plausible in this history, what check would settle it and what the result or record shows. Give prescribed drugs, pharmacy purchases, recreational substances and withdrawal a separate pass, with timing. Say what you chose not to test and why. Conclude with what the analysis leaves standing. Medical and diagnostic references, in APA 7, back each closure.
How this NR 547 Week 4 example is built
The analysis opens with the presentation: five weeks of low mood and hypersomnia, a five-day elevated period two summers ago and nonprescribed amphetamine use. Candidates follow in order of danger. An intracranial lesion is closed clinically. Thyroid disease is closed on a normal result. Stimulant-induced mood disorder and withdrawal are closed on a dated timeline and a negative drug screen. Stimulants as the cause of the earlier period are closed by receipts dating it half a year before first use. Anemia, mononucleosis, sleep disorders, alcohol and cannabis, B12 deficiency, pregnancy and autoimmune disease follow with their closures. A section covers medications and substances. The conclusion leaves a primary mood disorder standing and explains what was not tested.
Where the points sit in the NR 547 Week 4 rubric
Rule out analyses are generally graded on a neutral presentation, a relevant and well-ordered list of candidates, appropriate checks, clear reasoning for each closure and a sound conclusion. Ordering by danger rather than frequency shows clinical safety thinking. Giving each candidate the same three elements, plausibility, check and closing finding, makes the analysis easy to follow. Tailoring candidates to the presentation, rather than pasting a standard list, shows judgment. A separate substance and medication pass, with timing, catches the most common mimics. Explaining which tests were not ordered and why shows proportionate practice. A conclusion stating what remains, and why it matters for the diagnosis, completes the analysis, supported by APA 7 citations.
NR 547 Week 4 help: mistakes that cost points
Analyses often paste a long list of possible causes with no reasoning about why each applies to this patient. Tailor the list. Another weakness is closing candidates by assumption, such as the patient is young, rather than on a specific finding. Name the result or feature that closes each. Some students order tests for everything, which is costly and unnecessary; explain why some candidates were closed clinically. Substances deserve careful timing, since a dated timeline often settles more than any laboratory test. Avoid leaving candidates without a conclusion. Keep the presentation neutral so the list is not shaped by a diagnosis already chosen. Finish by saying what the analysis leaves standing and what the next step in diagnosis must decide.
Get a NR 547 Week 4 example written to your instructions
Send the Week 4 instructions with whatever history your section supplies, and a custom example is written for that presentation and returned inside 24 to 48 hours. The first one is free. Ordering anything for a real patient is a decision that belongs to you and the site you work in.
More NR 547 papers and PMHNP samples
- NR 547 Week 1: Diagnostic Position Discussion
- NR 547 Week 2: Criteria Mapping Write-Up
- NR 547 Week 3: Diagnostic Formulation
- NR 547 Week 5: Case Analysis
- NR 547 Week 6: Lifespan Variation Write-up
- NR 547 Week 7: Medical Mimic Brief
- NR 547 Week 8: Diagnostic Case Paper
- NR 546 Week 4: Titration and Monitoring Plan
NR 547 Week 4 questions, answered
How many causes should the analysis cover?
Enough to cover the dangerous ones and the plausible ones, which for most vignettes lands in the small handful rather than the dozen. A long list of every condition ever associated with a symptom reads as padding and dilutes the entries that matter. Depth beats breadth here, because the mark sits on the reasoning inside an entry rather than on the number of entries.
Can I rule something out without a laboratory result?
Often, yes, and saying how is the point. History, timing, age at onset, the course of the illness and collateral report all close candidates legitimately. What does not work is closing one silently. If a result is genuinely needed and the vignette does not supply it, name the test, say what each outcome would mean, and leave the candidate open rather than pretending otherwise.
Where do prescribed medications belong?
In their own pass, worked against the timeline. Agents given for physical conditions can produce mood, anxiety and psychotic presentations, and a discontinuation can do the same. The question is whether the picture began, worsened or changed shape near a start, a dose change or a stop. That is a comparison of dates, and it is one of the cheapest checks available.
Where can I find a free NR 547 Week 4 sample paper?
The nine-candidate rule out analysis above serves as the NR 547 Week 4 sample, published openly. If your presentation invites different candidates, outline the history and our team can prepare an analysis that closes each one.
How should NR 547 Week 4 order its candidates?
By what would be worst to miss, with dangerous and reversible causes first. The sample starts with an intracranial lesion and thyroid disease before the likelier substance causes.