Acute Confusion (Delirium) Nursing Diagnosis & Care Plan

Acute confusion is a clinical emergency that hides in plain sight. The change in mental status is almost always a symptom of something else (infection, a drug, a metabolic problem) and your job is to recognize it early, find and treat the cause, and keep the client safe while their brain recovers. Know the client's baseline, because delirium is defined by the change from it.

What is Confusion?

Confusion is cognitive impairment that signals disrupted cerebral metabolism. Acute confusion (delirium) can strike any age group and develops over hours to days, driven by infection, fluid or electrolyte imbalance, cerebrovascular accident, substance intoxication, or medication side effects.

Risk factors split into two groups: those that raise baseline vulnerability (underlying brain disease such as dementia, stroke, or Parkinson's disease) and those that precipitate the disturbance (infection, sedatives, immobility).

Delirium is hard to catch because the picture varies. In the DSM-5, its core feature is impaired awareness and attention, often with a disturbance in cognition.

A client with dementia can also develop delirium. Assess prehospital function and work with the family to recognize the deterioration.

Causes

The pathophysiology is not fully understood and is likely multifactorial. Contributing factors include:

• Age over 60
• Dementia
• Alcohol or drug abuse
• Hepatic encephalopathy
• Hypercapnia
• Neurotransmitter abnormalities (acetylcholine, dopamine, serotonin, GABA)
• Surgical procedures
• Certain medications such as anticholinergics

Signs and Symptoms

Do a complete physical including a mental status exam, and check temperature, pulse, blood pressure, and respiration. Diagnosis depends on documentation of a fluctuating course, so chart what you observe.

• Lack of motivation to initiate or follow through with purposeful behavior
• Fluctuating psychomotor activity (tremors, body movement)
• Misperceptions
• Fluctuating cognition
• Increased agitation or restlessness
• Fluctuating level of consciousness
• Disturbed sleep-wake cycle
• Hallucinations (visual or auditory) and illusions
• Impaired awareness and attention
• Disorientation
• Dysphasia, dysarthria

Goals and Outcomes

• The client has fewer episodes of delirium.
• The client regains normal reality orientation and level of consciousness.
• The client verbalizes the causative factors when known.
• The client initiates changes to prevent or minimize recurrence.
• The client demonstrates appropriate motor behavior.
• The client participates in ADLs.

Nursing Diagnosis

Use clinical judgment to formulate the diagnosis; the label matters less than the care. Examples:

• Acute Confusion related to decreased cerebral perfusion, as evidenced by disorientation to time and place, impaired attention span, and fluctuating level of consciousness.
• Acute Confusion related to medication side effects affecting neurotransmitter balance, as evidenced by visual hallucinations, misperceptions, and impaired short-term memory.
• Acute Confusion related to sensory overload in an unfamiliar environment, as evidenced by increased agitation, inability to recognize familiar people, and confusion during late afternoons (sundowning).
• Acute Confusion related to electrolyte imbalance affecting neuronal function, as evidenced by impaired awareness, attention deficits, and altered sleep-wake cycles.
• Acute Confusion related to altered sensory perception from substance intoxication, as evidenced by hallucinations, hyperactivity, and disorganized thinking.
• Acute Confusion related to decreased glucose availability to the brain, as evidenced by sudden-onset confusion, impaired judgment, and difficulty performing simple tasks.
• Acute Confusion related to metabolic disturbance from dehydration and nutritional deficit, as evidenced by decreased level of consciousness, disorientation, and lethargy.

Nursing Assessment and Rationales

1. Identify factors present: substance abuse, seizure history, recent ECT, fever or pain, acute infection (especially urinary tract infection in older adults), exposure to toxic substances, traumatic events, change in environment, unfamiliar noise, or excessive visitors. Almost any illness, intoxication, or medication can cause delirium, and the cause is often multifactorial, so assess each contributor.

2. Run an accurate mental status exam with validated tools. The CAM-ICU and the Intensive Care Delirium Screening Checklist (ICDSC) are validated for the ICU, with the CAM-ICU being the most reliable for detecting ICU delirium. For the general medical unit, the Nursing Delirium Screening Scale (Nu-DESC) and the 3D-CAM are validated.

3. Assess behavior and cognition systematically, day and night. Delirium always involves an acute change in mental status, so the baseline is key. Watch for insomnia, daytime drowsiness, and disturbing dreams. Clients often cannot recall why they are hospitalized or what happened during the delirious period.

4. Evaluate and report physiologic changes (sepsis, hypoglycemia, hypotension, infection, temperature changes, fluid and electrolyte imbalance, drugs with cognitive or psychotropic side effects). These may be driving the confusion and must be corrected. Confirm the disturbance is not from another neurocognitive cause.

5. Monitor lab results closely, noting hypoxemia, electrolyte imbalance, BUN, creatinine, ammonia, serum glucose, signs of infection, and drug levels (peak and trough as appropriate). A CBC with differential helps diagnose infection and anemia. Glucose levels identify hypoglycemia, diabetic ketoacidosis, and hyperosmolar nonketotic states. The calcium-binding protein S-100 B runs higher in clients with delirium and may serve as a serum marker.

6. Determine current medications and drug use, especially antianxiety agents, barbiturates, lithium, methyldopa, disulfiram, cocaine, alcohol, amphetamines, hallucinogens, and opiates, plus combinations that raise the risk of adverse interactions (cimetidine plus antacid, digoxin plus diuretics, antacid plus propranolol). Medication is one of the most important modifiable causes, especially anticholinergics, antipsychotics, and hypnosedatives. Anticholinergic toxicity risk is highest in frail older adults and those with dementia.

7. Evaluate impairment in orientation, attention span, ability to follow directions, communication, and appropriateness of response. Clients struggle to sustain attention and show problems with orientation, short-term memory, insight, and judgment. Test attention with tasks that require sustained focus and are not memorized: reciting the days of the week or months of the year backward, counting backward from 20, or serial subtraction.

8. Note the timing of agitation, hallucinations, and violent behavior. Assess for sundown syndrome. Sundowning brings increasing restlessness, agitation, and confusion in late afternoon. It may signal sleep disorder, hunger, thirst, or unmet toileting needs, and may be triggered by dimming light or a sense that it is time to "go home."

9. Determine whether the client has dementia or depression. Confusion appears in depression as well as dementia and delirium. Because confusion in older adults is so often attributed to dementia, providers may wrongly assume intervention is useless. The Geriatric Depression Scale screens for depression in older adults and needs minimal training to use.

10. Assess level of consciousness; ask the client to perform a three-step task. A component of the Mini-Mental Status Examination, the three-step task is a gross indicator of brain function and a baseline for later comparison. Because it requires attention, it also tests for delirium.

11. Assess pain using a 0-10 rating scale. Acute confusion can be a sign of pain. If the client cannot use a scale, watch for behavioral cues: grimacing, clenched fists, frowning, and hitting. Adequate pain treatment is crucial to this care plan.

Nursing Interventions and Rationales

1. Assist with treating the underlying problem (drug intoxication or withdrawal, infection, hypoxemia, biochemical imbalance, nutritional deficit, pain). Treating the cause maximizes function and prevents deterioration. Management combines supportive therapy and pharmacologic treatment. In a small percentage of clients, no cause is found despite a full workup.

2. Orient the client to surroundings, staff, and activities. Present reality concisely. A hospital stay is a major disruption, and a strange environment impairs orientation. Use calendars, clocks, and family photos as memory cues.

3. Modulate sensory exposure. Keep the environment stable, quiet, and well-lit; eliminate extraneous noise and stimuli, which the confused client misinterprets. In one ICU study, reducing nighttime sound with earplugs cut delirium risk by 53% and improved self-reported sleep for 48 hours.

4. Involve family and caregivers in reorientation and ongoing input such as current news and family happenings. Familiar faces raise comfort. Have family and staff explain proceedings, reinforce orientation, and reassure the client.

5. Give simple directions and allow time to respond. This reduces anxiety in a strange environment. Listen with interest; it helps you gauge the depth of confusion and decide whether to correct it.

6. Do not challenge illogical thinking. Challenges feel threatening and trigger defensiveness. Redirect gently and never condescend, giving the client a sense of security.

7. Provide for safety (supervision, side rails, seizure precautions, call bell within reach, needed items within reach, clear paths, ambulation aids). Simple measures minimize confusion and prevent falls: toilet doors painted an identifiable color, ward signs with pictures, and contrast between floor, bed, and toilet.

8. Avoid restraints. They worsen the situation and raise complications. Delirious clients may pull out IV lines, climb out of bed, and become combative. Constant observation or a sitter is preferable and helps avoid physical restraints. These clients should never be left alone.

9. Maintain normal fluid and electrolyte balance, nutrition, body temperature, oxygenation, blood glucose, and blood pressure. Treat low oxygen saturation with supplemental oxygen. Give fluid and nutrition carefully, since the client may be unwilling or unable to maintain intake. For suspected alcohol toxicity or withdrawal, include multivitamins, especially thiamine.

10. Communicate the client's status, cognition, and behavior to all providers. Fluctuating cognition is a hallmark of delirium, not a preference for certain caregivers. Poor handover raises medication errors, readmissions, and delays in diagnosis and treatment.

11. Plan care around a normal sleep-wake cycle. Clients with nocturnal exacerbations have more complications. Eye masks and earplugs reduce noise and light and improve sleep quality.

12. Reduce caffeine intake. Less caffeine reduces agitation and restlessness. Caffeine delays sleep onset, cuts total sleep time, and degrades sleep quality, and poor sleep is itself a risk factor for dementia.

13. Encourage visits and place familiar objects in sight. A familiar atmosphere provides orienting cues and balances sensory stimulation. Signage, color in the ward, and familiar items at the bedside create a calmer space.

14. Identify yourself by name at each contact and call the client by their preferred name. Take time to know the client and engage as equals. Person-centered practice improves outcomes and satisfaction.

15. Offer reassurance and use therapeutic communication often. Delirium is distressing; fear, panic, and anger are common, and clients often need counseling and education once it resolves.

16. Identify, evaluate, and treat pain immediately. Inadequate pain relief can cause delirium. Opiates can also precipitate confusion, so use them as clinically appropriate and monitor closely afterward.

17. Provide continuity of care (same caregivers, no room changes) and accurate handover at transfer. Verbal communication is required when followup care is needed within 48 hours, when deterioration is a concern, or when the client has complex needs.

18. Help the family develop coping strategies. Let the client do all they can to maximize function. Offer success-based activities matched to the client's preferences (music, hobbies, reading, games) to reduce boredom and support cognition.

19. Teach the family to recognize early confusion and seek help. Because delirious clients cannot give accurate histories, family and caregiver reports are essential. Suspect delirium with any acute or subacute decline in behavior, cognition, or function, especially in older, demented, or depressed clients.

20. Ensure the client uses vision and hearing aids. The client's own clean, working glasses and hearing aid let them perceive the environment and communicate.

21. Provide physical and occupational therapy. Restricted mobility costs muscle mass and strength, lengthens stays, and raises neuropsychiatric dysfunction. Early PT and OT cut the delirium rate from 41% to 28% and improve the odds of returning to independent living. Daytime physiotherapy also promotes a better night's sleep.

22. Avoid polypharmacy and OTC medications. Older clients often take many drugs, and interactions with the cholinergic, dopaminergic, or serotonergic systems can trigger delirium. Several low-grade delirium-inducing drugs together add up. Monitor medications continuously and discontinue what is unnecessary.

23. Administer benzodiazepines for drug or substance withdrawal as prescribed. These are reserved for delirium from seizures or withdrawal from alcohol or sedative-hypnotics, and are preferred over neuroleptics in withdrawal. They may help with hallucinogen, cocaine, stimulant, or PCP toxicity. Use caution: they can cause respiratory depression, especially in older adults.

24. Administer antipsychotics as indicated. This is the drug class of choice for the psychotic symptoms of delirium. Give haloperidol in low doses; high-dose haloperidol risks overdose and more delirium the next day.

25. Administer melatonin as indicated. Melatonin and its receptor agonist ramelteon may help prevent and manage delirium; melatonin levels are altered in delirium. Melatonin is available over the counter in North America, and ramelteon is FDA-approved for insomnia.

26. Provide education and support on confusion to the client and family. Cover confusion, dementia, and delirium, and train caregivers on support. Offer support groups, respite, and carer services. Account for cultural differences and use translators when needed.

27. Establish a toileting schedule, or offer the urinal or bedpan every 2 hours. If the client has short-term memory problems, toilet every 2 hours while awake and every 4 hours overnight. Post the schedule on the care plan and, discreetly, at the bedside. A client with memory problems cannot be expected to use the call light, so keep the urinal, bedpan, and essentials within reach.

28. If the client is hostile, do not argue, and leave if violence escalates. Do not argue with the client's interpretation of the environment. Say, "I can understand why you may hear, think, or see that." If the client misperceives your role (thief, jailer), leave and return in 15 minutes, reintroducing yourself as if for the first time. Acutely confused clients have poor short-term memory and may not recall the earlier encounter.

29. Reevaluate the need for ongoing therapies, which can become irritating stimuli. If the client is eating and drinking, consider removing the feeding tube. If an indwelling urethral catheter is in place, discontinue it as indicated and begin a toileting routine.