Confirmed by CAM, a composite 87-year-old's hypoactive delirium is traced in NU584's Unit 3 case past asymptomatic bacteriuria to hypercalcemia from antacid tablets and a thiazide. Searches like "nu 584 unit 3 assignment example", "nu584 unit 3 sample" and "nu584 unit 3 example" land here.
Not Slowing Down, but Ill: An Atypical Presentation Case That Looks Past a Tempting Urine Result to a Calcium of 12.8
[Student Name]
Purdue University Global
NU584: AGNP II - Primary Care of the Frail Elderly
Unit 3 Atypical Presentation Case
[Instructor Name]
[Date]
The patient is a composite; values and doses are bracketed.
The Governing Principle
A sudden change in function or cognition in a frail older adult is an acute illness until proven otherwise. Mrs. [D.], 87, taught dance for fifty years and until last week walked to her mailbox daily. For three days she has slept most of the day, eaten little and answered in single words. Her son brought her in because she "just seems tired." Aging does not do this in three days.
Presentation
Present: drowsiness, poor intake, reduced speech, constipation for [four] days, increased urination her son had noticed at night. Missing, and recorded as missing: no fever, no cough, no urinary burning or urgency, no pain, no new weakness on one side. Temperature [36.9] C, heart rate [96], blood pressure [118/68], oxygen saturation [96] percent. Dry mucous membranes. Chest clear. Abdomen soft, nontender; no suprapubic fullness; bladder scan [80] mL after voiding. No focal neurological signs. Medications, from the pill bottles her son brought: [hydrochlorothiazide] [25] mg daily for blood pressure; [calcium carbonate] chewables, [four to six] a day for heartburn over the past month, bought by her son; [vitamin D] [2,000] units daily; [donepezil] [5] mg for mild cognitive impairment.
Delirium, Diagnosed First
The Confusion Assessment Method requires an acute onset with a fluctuating course and inattention, together with at least one of two further features, muddled thinking or a changed level of alertness (Inouye et al., 1990).
1. Acute onset and fluctuation: yes; well a week ago, and her son says she is more alert in the mornings.
2. Inattention: yes; she could not name the months backward past October.
3. Disorganized thinking: answers too brief to judge.
4. Altered level of consciousness: yes; drowsy, rousable to voice.
Result: delirium, hypoactive type. Not dementia progression, which is gradual, and not depression, which does not cause inattention of this kind.
The Cause Table
Ordered with medications and common reversible causes first.
1. Drugs: new calcium chewables, thiazide, vitamin D, donepezil. Rule in or out: calcium level; review of timing.
2. Infection: urine, chest, skin. Rule in or out: urinalysis and culture, examination, chest X-ray if indicated.
3. Metabolic: sodium, glucose, calcium, kidney function. Rule in or out: basic metabolic panel with calcium.
4. Retention: urinary retention, constipation. Rule in or out: bladder scan, examination.
5. Pain: none found.
6. Hypoxia: saturation 96 percent; ruled out.
The Tempting Urine Result
Urinalysis: positive leukocyte esterase and bacteria; nitrite negative. It would be easy to stop here, call it a urinary infection and start an antibiotic. The case declines to. Bacteria and white cells in the urine are common in older women without infection, and the IDSA guideline advises against treating asymptomatic bacteriuria in older adults with delirium who have no urinary symptoms and no signs of systemic infection, recommending instead a search for other causes (Nicolle et al., 2019). She has no dysuria, no fever and no flank pain. A culture is sent, but no antibiotic is started.
What Treating the Urine Would Have Cost
Had the case stopped at the urine, she would have gone home on an antibiotic with her calcium still rising. Her son would have kept giving the chewables, the thiazide would have continued, and she would likely have become more dehydrated and more confused over the following days, perhaps returning with kidney injury or a fall. The antibiotic would have added its own risks, including diarrhea and Clostridioides difficile infection, for an infection she did not have. Stopping at the first abnormal result would have been fast and plausible and wrong.
The Calcium
Calcium [12.8] mg/dL, albumin [3.8] g/dL, so corrected calcium about [13.0]. Creatinine [1.4] mg/dL, up from [0.9] six months ago. Sodium [142], glucose normal.
Hypercalcemia of this degree causes drowsiness, confusion, constipation, polyuria and dehydration, and it fits every feature of her presentation (Minisola et al., 2015). The likely cause is the combination the medication list shows: several grams a day of calcium carbonate, vitamin D, and a thiazide that reduces calcium excretion by the kidney. Dehydration from calcium-induced polyuria then worsens the kidney function and the calcium. Parathyroid hormone and vitamin D levels are sent to confirm, since primary hyperparathyroidism and malignancy are the two most common causes of hypercalcemia overall.
Management by Severity
A calcium of 12 to 14 mg/dL with symptoms is moderate hypercalcemia. Because she cannot drink enough, she is admitted for intravenous normal saline. [Calcium carbonate] and [vitamin D] are stopped; [hydrochlorothiazide] is stopped, with another blood pressure agent considered by the prescriber once she is rehydrated. Calcium and creatinine are rechecked in [12 to 24] hours. Heartburn will be treated with a different agent. If calcium does not fall with hydration, further treatment follows the cause.
Why Hypoactive Delirium Is Easy to Miss
Hypoactive delirium, in which a patient becomes quiet and drowsy rather than agitated, is the most common form in older adults and the most often missed. A quiet, sleepy grandmother does not alarm a family the way a confused, restless one does, and the change can look like tiredness or sadness. Her son's reading, "finally slowing down," is the reading most families would make. The clinician's job is to ask how quickly the change came, and three days is too fast for aging.
Preventing a Recurrence
Her discharge plan will list the calcium chewables and vitamin D doses to avoid, flag hydrochlorothiazide as a drug to reconsider, and recommend a calcium and kidney function check at her next visit. Her pharmacy will be asked to note that she should not receive calcium-containing antacids. Her son will receive the list in writing.
What Her Son Was Told
She is not slowing down; she is ill, and the illness is treatable. The chewable antacids he bought for her heartburn, with her water pill, raised the calcium in her blood. It was an easy mistake to make; calcium antacids are sold as harmless, and on their own at a normal dose they usually are. The problem was the dose, the vitamin D and the water pill together, in a body that clears calcium more slowly at 87. He was also told what recovery should look like: as her calcium falls and she is rehydrated, she should become more alert over a few days, though delirium can take longer than the cause to clear.
References
Inouye, S. K., van Dyck, C. H., Alessi, C. A., Balkin, S., Siegal, A. P., & Horwitz, R. I. (1990). Clarifying confusion: The confusion assessment method. A new method for detection of delirium. Annals of Internal Medicine, 113(12), 941-948. https://doi.org/10.7326/0003-4819-113-12-941
Minisola, S., Pepe, J., Piemonte, S., & Cipriani, C. (2015). The diagnosis and management of hypercalcaemia. BMJ, 350, h2723. https://doi.org/10.1136/bmj.h2723
Nicolle, L. E., Gupta, K., Bradley, S. F., Colgan, R., DeMuri, G. P., Drekonja, D., Eckert, L. O., Geerlings, S. E., Köves, B., Hooton, T. M., Juthani-Mehta, M., Knight, S. L., Saint, S., Schaeffer, A. J., Trautner, B., Wullt, B., & Siemieniuk, R. (2019). Clinical practice guideline for the management of asymptomatic bacteriuria: 2019 update by the Infectious Diseases Society of America. Clinical Infectious Diseases, 68(10), e83-e110. https://doi.org/10.1093/cid/ciy1121
How this NU584 Unit 3 example is structured
Clinical reasoning sets the order, visible at each turn. It opens on the course's governing principle: a sudden change in function or cognition in a frail older adult is an acute illness until proven otherwise. The delirium diagnosis comes next, made with a named instrument before any cause is sought. The cause table is the working center, and its order matters, putting medications and common reversible causes ahead of rare ones. The longest paragraph handles the urine result. Citing the IDSA's 2019 guideline on asymptomatic bacteriuria, it explains why bacteria in an older woman's urine, without urinary symptoms or systemic signs, call for looking elsewhere instead of antibiotics. The hypercalcemia follows, then management by severity: hydration, in hospital if she cannot drink, stopping the chewables and the thiazide, bracketed for the prescriber, and a dated recheck.
Get an NU584 Unit 3 example written to your instructions
Your Unit 3 case may present a different illness in disguise, so send the scenario as posted, including the medication list and any lab values, together with the rubric. The sample treats the change as acute illness until proven otherwise, names delirium with a validated tool if it is present, and brackets every drug. Free the first time you ask; ready in 24-48h. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
NU584 Unit 3 questions, answered
Why not treat the positive urine test to be safe?
Because bacteria in the urine are common in older women without infection, and treating them brings antibiotic harms, including C. difficile, while the true cause goes unfound. The IDSA's 2019 guideline advises evaluating for other causes when an older adult has delirium without urinary symptoms or systemic signs. Graders generally credit a paper that states this reasoning explicitly.
What makes a presentation atypical in older adults?
A common illness arriving without its usual signs, or through a change in function: falls, confusion, loss of appetite, incontinence or a sudden need for help. Blunted fever and pain responses, reduced reserve and coexisting conditions all contribute. The paper should name what was absent and explain why that absence did not rule anything out.
Is hypercalcemia a common cause of delirium?
Less common than infection or drugs, which is why the case reaches it only after checking those first. A basic metabolic panel with calcium is still worth obtaining in any unexplained delirium, and supplements or antacids containing calcium are easy to miss unless the history asks about over-the-counter products directly.