Organic Mental Disorders: Causes and Nursing Care

Table of Contents

Organic Mental Disorders: Comprehensive Nursing Lecture Notes

Organic mental disorders is a traditional nursing-curriculum term for changes in thinking, memory, mood, perception or behaviour associated with disease, injury, medicines, substances or other physiological disturbance affecting the brain. It is a broad teaching umbrella, not one single modern diagnosis. Contemporary practice identifies the specific syndrome and its cause where possible, such as delirium, a neurocognitive disorder, a psychotic or mood syndrome due to a medical condition, or a substance/medication-induced disorder.

These presentations are real and may be reversible, persistent or progressive. A patient may also have a primary mental illness and a physical or neurological disease at the same time. New confusion, reduced attention, fluctuating alertness, seizure, fever or sudden behaviour change should first prompt assessment for an urgent medical or neurological cause. Follow Uganda Ministry of Health guidance, facility protocols, clinical supervision and your professional scope.

Learning objectives

By the end of this lesson, the learner should be able to:

Define the traditional term organic mental disorder and explain why modern assessment names the specific cause and syndrome.
Describe common causes and contributing factors, including infection, metabolic disturbance, brain disease or injury, medicines and substances.
Differentiate the typical course and presentation of delirium from dementia and other secondary mental-state changes.
Recognise urgent warning signs and outline a focused mental, physical and neurological assessment.
Describe investigations, immediate management, condition-specific care and nursing interventions with rationales.
Explain safe, respectful support for people with delirium, dementia, epilepsy, HIV-related brain disorders and postpartum psychosis.

Meaning, terminology and important distinctions

What does “organic” mean in nursing

Older classification systems used organic for mental or behavioural changes thought to result from identifiable brain disease, injury or physiological disturbance. The term helped learners remember that confusion, hallucinations or personality change can be symptoms of a physical or neurological condition. However, it can falsely suggest that mental and physical health are separate, or that a normal scan proves a problem is “functional.” Current clinical practice uses the history, examination, course and appropriate investigations to identify the most likely syndrome and cause.

Safe clinical principle: describe the change, assess the person and look for its cause. Do not label a patient “organic,” “demented,” “psychotic” or “just psychiatric” before a proper assessment. A medical cause may be treatable, and more than one condition may coexist.

Key terms

Delirium: an acute, usually fluctuating disturbance of attention and awareness with additional changes in cognition. It often signals an underlying illness or drug/substance effect and requires urgent assessment.
Dementia / major neurocognitive disorder: an acquired decline in one or more cognitive abilities that interferes with independence in everyday activities. It is usually progressive, although the pattern depends on the cause. Dementia is not an inevitable part of ageing.
Mild cognitive impairment: measurable cognitive difficulty with relative preservation of independence. It is not the same as dementia and needs clinical assessment and follow-up.
Secondary psychosis or mood syndrome: hallucinations, delusions, depression, mania, anxiety or behavioural change arising in relation to a medical/neurological condition, medicine or substance. The clinician must assess the cause and differential diagnosis.
Amnestic syndrome: a prominent disorder of memory, sometimes related to neurological disease, injury, alcohol-related thiamine deficiency or another cause. New severe memory loss needs medical assessment.
Postictal state: a period of confusion, sleepiness, headache or behaviour change after a seizure. Persistent confusion, repeated seizures or failure to recover requires urgent review.

“Organic” is not the opposite of “real” or “psychological.” Psychological distress can occur with physical illness, and a person with a brain disorder still has preferences, rights, strengths and a need for compassionate nursing care.

Common conditions included in the curriculum

A Uganda Ministry of Health nursing teachers’ guide has traditionally grouped delirium, dementia, epilepsy, HIV psychosis and puerperal psychosis under organic mental disorders. The table below connects that curriculum language to careful contemporary nursing descriptions. These conditions do not all share one cause or one treatment.

Condition or presentation	Typical pattern	Priority nursing concern
Delirium (acute confusional state)	Hours to days; impaired attention, altered awareness, disorientation and fluctuating cognition or level of activity.	Urgently detect and escalate the underlying medical, neurological, medication or substance cause.
Dementia / major neurocognitive disorder	Persistent decline in memory and/or other thinking abilities, with reduced ability to manage usual activities.	Assess baseline and function; prevent injury; support dignity, independence, caregivers and continuity of care.
Epilepsy and seizure-related mental-state change	Recurrent unprovoked seizures may be followed by temporary confusion; a minority develop other interictal or postictal psychiatric symptoms.	Protect airway and safety during a seizure, time the event, recognise status epilepticus and assess recovery.
HIV-related cognitive or psychotic presentation	May relate to HIV-associated brain disease, opportunistic infection, another medical illness, medicine effects or a coexisting primary mental disorder.	Do not assume all new symptoms are HIV psychosis; assess for infection, neurological change, medication issues and urgent complications.
Psychiatric symptoms due to a medical or neurological condition	Changes in mood, sleep, behaviour, memory or perception associated with a disease, injury or physiological disturbance.	Review timing, physical findings and medicines; coordinate medical and mental-health care.
Postpartum psychosis	Severe mood, thought, sleep or behaviour change after childbirth; onset can be rapid and symptoms may fluctuate.	Psychiatric and obstetric emergency. Protect parent and infant, and assess for medical causes without delay.

Important classification note: epilepsy is a neurological disorder, and postpartum psychosis is often a severe postpartum mood/psychotic illness. They may appear under “organic disorders” in older teaching plans, but the label alone does not establish their mechanism. Use current clinical assessment and the applicable national protocol.

Causes and contributing factors

Many different disturbances can affect brain function. Causes may be acute and reversible, chronic or progressive. Several can occur together—for example, dementia with superimposed delirium during an infection.

Cause group	Examples	Nursing relevance
Infections and inflammation	Malaria, meningitis or encephalitis, HIV-related disease, sepsis, pneumonia, urinary infection and other systemic infections.	Fever, headache, neck stiffness, reduced consciousness or rapid deterioration needs urgent clinical review; infection can present with confusion, especially in older or medically unwell people.
Metabolic, endocrine or organ failure	Hypoglycaemia or severe hyperglycaemia, electrolyte disturbance, dehydration, hypoxia, severe anaemia, renal or hepatic failure, thyroid or other endocrine disturbance.	Check observations and point-of-care glucose when indicated; correct abnormalities under authorised clinical orders and monitor response.
Brain disease or injury	Stroke, head injury, brain tumour, epilepsy, neurodegenerative disease, vascular disease and other neurological conditions.	Look for focal neurological signs, recent falls, seizure, severe headache or sudden onset; arrange urgent assessment and transfer according to capacity.
Medicines and substances	Adverse effects, toxicity, interactions, anticholinergic burden, sedatives, alcohol or drug intoxication, and withdrawal from alcohol, sedatives or other substances.	Record exact medicine/substance, dose if known, timing and last use. Do not abruptly stop prescribed medicines or treat withdrawal outside local protocol.
Neurodegenerative and vascular processes	Alzheimer disease, vascular cognitive impairment, dementia with Lewy bodies, frontotemporal degeneration and mixed causes.	Clarify gradual change from baseline and effects on daily activities; assess for delirium or other treatable contributors as well.
Nutritional and other factors	Thiamine or other nutritional deficiency, poor intake, sleep disruption, chronic pain, sensory impairment and multiple simultaneous illnesses.	Assess nutrition, hydration, pain, vision and hearing; treat specific deficiencies and clinical causes as prescribed.
Peripartum and reproductive health	Postpartum psychosis and other severe postpartum mental-state changes; medical conditions such as infection, eclampsia or metabolic illness can also cause acute change.	Ask about recent pregnancy and birth sensitively. Sudden severe insomnia, confusion, mania, hallucinations or unsafe behaviour after childbirth requires urgent specialist and medical assessment.

Predisposing, precipitating and perpetuating factors

Predisposing factors: older age, previous cognitive impairment, neurological illness, frailty, prior brain injury, chronic medical conditions, sensory loss and previous delirium.
Precipitating factors: acute infection, surgery, pain, dehydration, poor sleep, hypoxia, medication change, substance intoxication or withdrawal, constipation, urinary retention and unfamiliar surroundings.
Perpetuating factors: untreated illness, continued exposure to a causative medicine or substance, immobilisation, poor intake, disrupted sleep, fear, sensory deprivation, repeated room changes and lack of orientation.
Protective factors: early recognition, treatment of underlying causes, familiar supportive people, mobility, hydration, nutrition, sensory aids, a calm environment and continuity of care.

Basic pathophysiology

The brain depends on adequate oxygen, glucose, blood flow, nutrition, sleep and a balanced internal environment. Infection, inflammation, toxins, drugs, seizures, injury or metabolic disturbance can disrupt brain networks. An acute diffuse disturbance commonly produces delirium, while progressive neuronal or vascular damage can produce a chronic neurocognitive syndrome. The observed behaviour is a symptom of altered brain function; it is not automatically deliberate misconduct.

General signs and symptoms

Presentation depends on the cause, speed of onset, areas of the brain affected, age, baseline cognition and other illness. Record what changed, when it began and how it affects the person’s normal function.

Attention and awareness: inability to stay focused, distractibility, drowsiness, altered alertness or episodes of seeming clearer followed by worsening.
Orientation and memory: confusion about time, place or people; difficulty retaining new information; repeated questions or inability to recall recent events.
Thinking and language: slowed responses, disorganised reasoning, difficulty following instructions, word-finding difficulty or inability to complete familiar tasks.
Perception: illusions, visual or auditory hallucinations, misidentification or suspiciousness. New hallucinations may reflect delirium, medicines, dementia or another condition.
Mood and behaviour: fear, irritability, apathy, agitation, withdrawal, disinhibition, wandering, sleep-wake reversal or a personality change.
Psychomotor change: pacing and restlessness (hyperactive presentation), reduced movement and speech (hypoactive presentation), or fluctuation between the two.
Physical and functional effects: poor intake, incontinence, falls, reduced self-care, weakness, pain, fatigue or inability to manage usual responsibilities.

Do not miss hypoactive delirium: a quiet, sleepy, withdrawn or “cooperative” patient may be acutely unwell. Reduced activity is not reassurance; check attention, alertness, observations and change from baseline.

Delirium (acute confusional state)

Definition and course

Delirium is an acute clinical syndrome usually developing over hours or a few days. It involves impaired attention and awareness with additional disturbance of cognition, and it often fluctuates during the day. Uganda Clinical Guidelines describe acute confusion with impaired attention, disorientation and fluctuating level of consciousness; local causes include infection, intoxication or withdrawal, medicines, head trauma, anaemia, dehydration and glucose or electrolyte disturbance. Delirium is a medical warning sign, not a stand-alone psychiatric diagnosis.

Clinical features

Acute onset or clear deterioration compared with the person’s usual mental state.
Poor attention: loses track of conversation, cannot follow a simple instruction or is easily distracted.
Altered level of consciousness or awareness; confusion may come and go.
Disorientation, impaired short-term memory, incoherent or disorganised thinking.
Sleep-wake reversal, restlessness, fear, irritability, hallucinations or illusions; symptoms may worsen at night.
Hyperactive delirium: agitation, pacing, pulling at lines or unsafe attempts to leave.
Hypoactive delirium: unusual drowsiness, slow responses, reduced movement or withdrawal; it is easily overlooked.
Mixed delirium: periods of hyperactivity and reduced activity.

Assessment and immediate response

Stabilise and call for help: assess airway, breathing, circulation, responsiveness and immediate safety. Escalate promptly to the responsible clinician; arrange emergency transfer for instability, suspected severe infection, stroke, meningitis, poisoning, seizure or care beyond the facility’s capacity.
Check immediate reversible threats: obtain observations and point-of-care glucose where indicated and within protocol. Assess oxygenation, hydration, temperature, pain, injury and recent seizure or substance exposure.
Establish baseline and onset: ask the patient and, where appropriate, a trusted informant about the usual cognition and function, exact time course, recent illness, sleep, intake and behavioural change. Document the informant and time.
Review medicines and substances: reconcile prescribed, over-the-counter and herbal products, recent changes, missed doses, possible overdose and alcohol or drug use/withdrawal. Ask a prescriber or pharmacist to review possible contributors.
Assess cognition and risk: observe attention, orientation, memory, speech and fluctuation. Use a locally approved screening tool only if staff are trained; a score supports but does not replace clinical diagnosis.
Investigate the likely cause: support targeted medical examination and tests as ordered. Avoid delaying treatment of a seriously unwell patient while waiting for a complete history.

Management principles for delirium

Treat the underlying cause: the clinician addresses infection, hypoxia, glucose or electrolyte disturbance, dehydration, pain, organ failure, medication toxicity, seizure or withdrawal as appropriate. Treatment depends on the cause; there is no single medicine for all delirium.
Provide supportive nursing care: maintain hydration and nutrition if safe, monitor intake/output as indicated, provide oral care, manage pain and fever under orders, promote mobility and protect sleep.
Orient and reassure: introduce yourself each time, explain where the person is and what is happening, use a clock/calendar and familiar objects, keep a visible day-night routine and use short simple sentences.
Support senses and reduce distress: ensure glasses, hearing aids and dentures are available; reduce excessive noise and unfamiliar staff changes; allow a trusted relative or carer to support when appropriate and consented.
Prevent injury and complications: keep the bed area uncluttered, make the call bell accessible, assist mobility, observe according to risk, protect skin, prevent aspiration where relevant and reassess falls risk. Use the least restrictive safe approach permitted by law and policy.
Use medicines cautiously: medication for severe distress or immediate risk is a clinician’s decision after assessing causes, contraindications and local guidance. Sedatives or antipsychotics can cause harm and must not replace treatment of the cause. Benzodiazepines are generally reserved for specific indications such as alcohol or sedative withdrawal under protocol.
Communicate and hand over: report the baseline, onset, fluctuation, observations, suspected cause, medicines, investigations, safety actions and response. Reassess frequently because delirium can change quickly.

Why early recognition matters: delirium may be the first sign of a serious infection, metabolic problem, drug toxicity or brain injury. Prompt cause-directed care may prevent deterioration and help cognition return toward baseline.

Dementia and major neurocognitive disorder

Meaning and common causes

Dementia is a syndrome of decline in memory, thinking, communication or other cognitive abilities that interferes with daily independence. It is not a normal or inevitable consequence of ageing. Alzheimer disease is common; other causes include vascular disease, dementia with Lewy bodies, frontotemporal degeneration and mixed disease. Cognitive decline may also be associated with HIV, stroke, harmful alcohol use, repeated brain injury or nutritional deficiency. Some contributors to confusion are treatable, so assessment remains important even when decline has been gradual.

Features and progression

Memory: forgets recent events, repeats questions, loses objects or struggles to learn new information.
Language and communication: difficulty finding words, following conversation, naming familiar objects or expressing needs.
Executive function: difficulty planning, sequencing, solving problems, handling money or making decisions.
Orientation and visuospatial skills: loses track of time, gets lost in familiar places or misjudges distances.
Behaviour and emotion: apathy, anxiety, sadness, irritability, disinhibition, suspicion, sleep disruption or withdrawal from usual activities.
Daily function: increasing help needed with medicines, cooking, bathing, dressing, mobility, continence, eating or safety.

Progression and symptoms vary. A sudden new change in someone with dementia is not automatically “the dementia getting worse”; look for superimposed delirium, infection, pain, constipation, urinary retention, dehydration, medication effects, sleep loss or another acute illness.

Assessment and care

Take a gradual history from the person and, with consent or according to applicable safety duties, someone who knows their usual abilities. Ask about onset, progression, function, safety, mood, sleep, medicines, alcohol, medical history, vision/hearing and cultural or language context.
Assess physical health and cognition, including the person’s ability to manage everyday activities. Cognitive screening may support assessment but does not alone diagnose dementia or determine capacity.
Consider delirium, depression, medication effects, sensory loss, sleep disorder, thyroid/metabolic conditions, HIV-related disease and other treatable causes. Investigations are selected by the clinician based on history and examination.
Use a person-centred plan: learn the person’s routines, strengths, preferences and meaningful activities. Offer choices, maintain independence safely, use reminders and step-by-step cueing, and avoid talking over the person.
Promote regular sleep, movement, hydration, nutritious food, social connection, cognitive stimulation and management of pain and chronic disease. Review medicines regularly with the prescriber.
Support caregivers with practical teaching, respite and referral options. Ask about caregiver fatigue, financial strain and safety; include family or carers with the patient’s consent and keep the patient central in decisions.
Discuss future preferences, trusted decision support and advance planning while the person can participate. A diagnosis does not automatically remove decision-making capacity; assess capacity for the specific decision in question.
Medicines may be considered for selected dementia types or symptoms by an authorised prescriber. Monitor response and adverse effects. Non-drug approaches, assessment of physical triggers and a safe environment are important, particularly for distressing behaviour.

Epilepsy and seizure-related mental-state changes

Epilepsy is a neurological condition, not a synonym for mental illness. Some people experience confusion, fatigue, headache or temporary memory problems after a seizure. Less commonly, psychotic or mood symptoms can occur in relation to seizures or the postictal period. New or persistent behavioural change still requires assessment for seizure activity, injury, infection, medicines and other causes.

Nursing care during and after a seizure

Stay with the patient, call for trained help, note the start time and protect them from nearby hazards. Cushion the head and loosen tight clothing around the neck.
Do not restrain the person and do not put fingers, spoons, cloth or other objects in the mouth. Do not give food, drink or oral medicine until fully alert and safe to swallow.
When movements stop, assess breathing and responsiveness; place on the side when appropriate, maintain privacy and check for injury. Give first aid and oxygen only within training and protocol.
Escalate urgently for a seizure lasting about five minutes or longer, repeated seizures without recovery, breathing difficulty, first known seizure, significant injury, pregnancy, diabetes, persistent reduced consciousness or another serious concern. Follow local emergency pathways.
During recovery, speak calmly, reorient gently and allow rest. Record duration, observed movements, awareness, injury, recovery and any witness account. Do not assume ongoing confusion is simply postictal if the patient is deteriorating or not recovering.

HIV-related cognitive change or psychosis

HIV may be associated with cognitive impairment or mental-state change through several pathways, including central nervous system disease, opportunistic infection, systemic illness, medication effects, substance use, sleep problems or a coexisting psychiatric disorder. The phrase “HIV psychosis” should not end the assessment. New confusion, fever, headache, seizure, reduced consciousness or focal neurological findings needs urgent investigation for a treatable medical or neurological cause.

Ask about the timing of symptoms, HIV care and treatment, adherence, recent medicine changes, other illnesses, alcohol/substance exposure, sleep and baseline function in a private, non-judgmental way.
Maintain confidentiality and follow consent and local testing policy. Coordinate with the HIV clinician and mental-health or neurology service as required.
Support prescribed antiretroviral treatment and follow-up; do not change or stop ART independently. Monitor for interactions and adverse effects under clinical orders.
Include the patient in decisions, address stigma and link to practical and psychosocial support. Family involvement requires consent except where applicable law and immediate safety duties provide otherwise.

Postpartum psychosis and puerperal mental-state emergency

Some older nursing curricula list puerperal psychosis among organic disorders. Contemporary practice treats acute postpartum psychosis as a severe psychiatric emergency, while also assessing for physical causes such as infection, eclampsia, medication effects or metabolic disturbance. It is not safe to assume that unusual beliefs or confusion after childbirth are merely stress or a normal adjustment.

Urgently alert the responsible medical, obstetric and mental-health team for new severe insomnia, confusion, rapidly changing mood, disorganised behaviour, hallucinations, delusions, mania, suicidal thoughts or thoughts of harming the infant.
Maintain close, compassionate observation and a calm environment; assess immediate safety of parent and infant. Arrange appropriate supervision and support rather than leaving either person unsupported.
Assess vital signs, physical recovery, pain, medication, substance exposure, sleep, hydration and possible obstetric or medical complications. Do not delay transfer or specialist review while applying a diagnostic label.
Communicate respectfully and protect privacy. Involve a trusted support person when appropriate, consented and safe; follow local safeguarding and emergency procedures.

Comprehensive nursing and clinical assessment

1. Immediate safety and physical stability

Assess airway, breathing, circulation, level of consciousness, temperature, oxygenation and vital signs as indicated.
Check glucose promptly where altered cognition, diabetes, poor intake or other clinical features make it relevant and local procedure permits.
Look for head injury, seizure, focal neurological signs, fever, severe headache, neck stiffness, breathing difficulty, shock, severe dehydration, poisoning or withdrawal.
Ask about risk of falls, wandering, self-neglect, suicide, accidental harm or vulnerability. Ensure observation and a safe environment appropriate to current risk.
Escalate any sudden change, reduced consciousness, seizure, serious physical finding or immediate safety threat through the emergency pathway.

2. History and collateral information

Baseline and timeline: normal memory, behaviour and function; exact onset, sudden or gradual course, fluctuation, previous episodes and recovery between episodes.
Medical and neurological history: infection, HIV, diabetes, stroke, seizures, head injury, chronic illness, surgery, pregnancy/recent birth, pain, sleep and nutritional status.
Medicines and substances: prescribed and non-prescribed medicines, herbal remedies, recent changes, adherence, possible overdose, alcohol and other substances, intoxication or withdrawal.
Function and safety: mobility, self-care, eating/drinking, continence, medication use, driving or wandering risk, home supports and caregiver burden.
Patient’s experience: fear, distress, hallucinations, beliefs, mood, sleep, preferences and what the patient wants help with.
Collateral information: where appropriate, ask family or a trusted caregiver what changed and when. Explain why information is needed, seek consent where possible, identify the source and protect confidentiality.

3. Mental state, cognitive and neurological examination

Domain	Observe or assess	Why it matters
Appearance and behaviour	Alertness, hygiene, posture, eye contact, agitation, slowed movement, wandering or unusual movements.	Shows change from baseline, immediate risk and possible medication or neurological effects.
Attention and awareness	Ability to stay focused, follow a brief instruction and maintain conversation; note fluctuation.	Acute inattention and variable alertness strongly raise concern for delirium.
Orientation and memory	Awareness of time, place and people; registration and recall appropriate to training and setting.	Helps describe cognitive change but no single bedside question confirms or excludes a disorder.
Speech and thought	Rate, fluency, coherence, word finding, organisation, unusual beliefs and ability to understand.	Assists assessment for cognitive, neurological, mood, psychotic or medication-related change.
Mood, perception and sleep	Fear, low or elevated mood, hallucinations, illusions, sleep-wake reversal and distress.	Guides support and risk assessment; symptoms can arise from several causes.
Neurological and physical signs	Gait, strength, pupils, coordination, injury, hydration, nutrition, pain and other findings as appropriate to competence.	Focal deficits or systemic illness can indicate an urgent neurological or medical cause.
Daily function and decision-specific capacity	Ability to manage usual tasks; understanding, retaining and weighing information for a particular decision when formal assessment is required.	Supports safe planning while respecting that diagnosis alone does not establish incapacity.

Red flags that need urgent review

Sudden or rapidly worsening confusion, reduced attention or fluctuating consciousness.
Fever, severe headache, neck stiffness, new seizure, head injury or focal neurological signs.
Very low or high glucose suspected, hypoxia, shock, severe dehydration, severe anaemia or poisoning.
Possible alcohol or sedative withdrawal, overdose or a serious adverse drug reaction.
New psychosis or mania during pregnancy or after childbirth; suicidal intent or immediate risk to the infant.
Inability to eat, drink, move or meet essential needs; repeated falls or unsafe wandering.

Investigations and differential diagnosis

Investigations are selected by the responsible clinician to answer a question from the history and examination. No single test diagnoses every organic mental disorder, and a normal initial test does not mean the person’s symptoms are unreal.

Observations and bedside tests: vital signs, oxygenation, point-of-care glucose and other immediate measures guided by the presentation.
Laboratory tests: blood count, electrolytes, renal/liver function, glucose, infection investigations, thyroid or nutritional tests, pregnancy test or other tests when clinically indicated.
Urine, malaria or infection testing: guided by symptoms, local epidemiology and protocol; interpret results in clinical context.
HIV and other testing: offer with consent and according to national policy where clinically appropriate. Consider opportunistic disease in a person with HIV and new neurological symptoms.
Imaging, ECG, EEG or cerebrospinal fluid assessment: may be required for suspected stroke, head injury, seizure, focal findings, arrhythmia, CNS infection or atypical presentation; specialist judgment guides selection.
Cognitive assessment: a trained clinician may use an appropriate tool alongside history and functional assessment. Screening scores do not alone establish dementia or capacity.

Differential diagnosis includes delirium, dementia, depression, primary psychosis or bipolar disorder, seizure/postictal state, substance intoxication or withdrawal, medication effects, infection, stroke, metabolic disease, sleep disorder, sensory impairment and postpartum psychiatric or medical illness. More than one may be present. Document what is known, what remains uncertain and what was escalated.

Overall management principles

Identify and treat the cause: prompt medical assessment is central, particularly in delirium. Treat infection, metabolic disturbance, pain, medication toxicity, withdrawal, brain injury or other condition under the responsible clinician and current guideline.
Stabilise and protect: support breathing and circulation, prevent injury, monitor consciousness and observations, and arrange referral/transfer when required.
Use a calm, supportive environment: reduce unnecessary noise and nighttime disruption, reorient, provide sensory aids and preserve familiar routines.
Maintain basic needs: support hydration, nutrition, toileting, skin care, oral hygiene, mobility, sleep and pain control; document intake and response where indicated.
Review medicines: reconcile all medicines and ask the prescriber to assess possible contributing or interacting drugs. Nurses administer only prescribed or protocol-authorised treatment and monitor for benefit and harm.
Include the patient and carers: communicate in accessible language, respect privacy and consent, include a trusted supporter when appropriate, and address stigma and caregiver strain.
Plan follow-up and rehabilitation: review cognition and function after acute illness, arrange condition-specific follow-up, teach warning signs and help reconnect with services.

DELIRIUM check: Develops suddenly; Episodes fluctuate; Limited attention; Impaired awareness; Rapidly seek a cause; Injury and infection risk; Urgent escalation; Monitor and reorient. This is a revision aid, not a diagnostic tool.

Nursing care plan: actions and rationales

Plan care with the person and the multidisciplinary team. Select priorities from assessment; not every action applies to every patient.

No.	Nursing action	Rationale and evaluation
1	Assess mental state, attention, physical status and neurological signs at first contact and when the condition changes. Record observations, onset, baseline and the patient’s own words.	Creates a baseline and helps detect rapid deterioration. Evaluate whether change was documented and the right clinician was informed.
2	Escalate acute confusion or reduced consciousness promptly. Check urgent needs and follow facility emergency/referral procedures.	Delirium may result from a serious treatable illness. Evaluate time to review, transfer and management of the suspected cause.
3	Maintain proportionate observation and a safer environment. Assist mobility, reduce hazards and reassess wandering or falls risk.	Cognition and risk fluctuate. Evaluate falls, injury, distress and whether observation remains appropriate and least restrictive.
4	Reorient in a calm, respectful manner. Introduce yourself, explain care, use a clock/calendar and repeat short instructions as needed.	Familiar cues can reduce fear and support understanding. Evaluate distress, engagement and ability to follow the immediate plan.
5	Support hydration, nutrition, toileting, oral care, skin care and sleep. Assist without taking over tasks the patient can do safely.	Illness and confusion increase risk of dehydration, malnutrition, pressure injury and functional decline. Review intake, comfort, skin and sleep.
6	Review medicines and allergies, administer only authorised treatment and monitor effects. Report a suspected adverse effect or interaction promptly.	Medicines can contribute to confusion and may also be needed for a serious cause. Evaluate response, sedation, mobility and other adverse effects.
7	Use simple communication and allow extra response time. Approach visibly, speak clearly and avoid arguing with hallucinations or disorientation.	Reduces misunderstanding and distress. Evaluate whether the patient can express basic needs and feels treated with dignity.
8	Provide seizure safety and document an event accurately. Time the seizure, protect from hazards and assess recovery.	Supports emergency decisions and continuity of care. Evaluate seizure duration, injury, breathing and return toward baseline.
9	Support independence and meaningful activity in dementia. Use familiar routines, cueing, safe mobility and appropriate cognitive/social activity.	Maintains function and personhood. Evaluate participation, comfort, self-care and changes in ability.
10	Involve and educate family or carers with the patient’s agreement when appropriate. Ask about caregiver stress and what support is available.	Carers can describe baseline and help continue routines, but may need support themselves. Evaluate understanding, consent and referral to support.
11	Protect privacy, dignity and decision-making rights. Explain care, seek consent where possible and assess capacity for the specific decision when needed.	Respectful care promotes trust and avoids unjustified restriction. Evaluate the person’s participation and whether information was shared appropriately.
12	Coordinate handover, referral and follow-up. Pass on baseline, onset, risks, observations, medicines, suspected cause, actions and response.	Continuity reduces missed information and treatment gaps. Confirm receipt of referral and the next review plan when feasible.

Therapeutic communication and behaviour support

Presentation	Helpful nursing response	Avoid
Disorientation or repeated questions	Answer patiently, use short statements, orient to place and time, give one step at a time and check glasses/hearing aids.	Shouting, humiliating, testing memory repeatedly or saying “you should know this.”
Hallucinations or suspiciousness	Ask what the person is experiencing and whether it feels threatening. Acknowledge emotion, maintain safety and report new symptoms.	Ridicule, confrontation, pretending to share the experience or ignoring a command to harm.
Agitation or wandering	Check pain, toileting, hunger, thirst, noise, fear, infection, constipation, urinary retention and medicine effects. Offer a calm walk or meaningful activity when safe.	Assuming deliberate misconduct, escalating confrontation or using restraint for convenience.
Reduced responsiveness	Assess consciousness, observations, glucose as indicated and change from baseline; escalate urgently.	Assuming the patient is sleeping, lazy or simply depressed without a physical review.
Postpartum psychosis	Use calm, non-judgmental language, maintain safety and arrange urgent psychiatric and obstetric assessment for parent and infant.	Blaming the parent, leaving them unsupported or delaying help while waiting for symptoms to pass.

Complications and outcomes

Untreated delirium can lead to worsening illness, falls, aspiration, dehydration, pressure injury, prolonged hospitalisation, persistent cognitive decline or death depending on the cause.
Dementia can lead to increasing dependence, malnutrition, falls, medication errors, wandering, social isolation and caregiver strain. These risks can be reduced through supportive planning and follow-up.
Seizures may cause injury, aspiration, status epilepticus or postictal complications.
HIV-related CNS disease and postpartum psychosis can progress rapidly without appropriate assessment and specialist treatment.
Stigma, coercive care, loss of dignity and exclusion from decisions can worsen distress and undermine trust.

Prevention and health promotion

Preventing delirium and avoidable deterioration

Recognise acute change early: compare with baseline and report inattention, fluctuation or reduced alertness promptly.
Support physical health: hydration, nutrition, mobility, pain control, sleep, infection prevention and timely management of chronic conditions.
Review medicines: use medicines safely, reconcile prescriptions and seek review when confusion follows a new medicine or dose change.
Protect orientation and sensory function: ensure glasses, hearing aids, familiar people and a calm day-night routine are available.
Prevent complications: use falls precautions and safe movement, prevent pressure injury and aspiration, and monitor intake and elimination when indicated.

Reducing risk of cognitive decline and supporting dementia

Promote regular physical activity, healthy diet, social connection and cognitive engagement across the life course.
Support prevention and treatment of hypertension, diabetes, stroke risk, hearing loss and other health conditions in line with national guidance.
Discourage tobacco use and harmful alcohol use; provide relevant screening, counselling and referral.
Promote head-injury prevention, access to health services and early review of concerning cognitive change.
Support caregivers and communities to reduce stigma, isolation and preventable barriers to diagnosis and care.

Application to nursing practice in Uganda

Uganda’s nursing teachers’ guide presents organic mental disorders as a curriculum grouping that includes delirium, dementia, epilepsy, HIV psychosis and puerperal psychosis. For examinations, know the list and be able to discuss causes, features and nursing management. In practice, use current terms and assess each condition on its own merits. The Uganda Clinical Guidelines 2023 include epilepsy, dementia and delirium in the mental, neurological and substance-use chapter; follow the applicable guideline, national referral pathway and facility protocol.

At primary or lower-level care, identify instability, check basic observations and immediate risks within your training, seek clinical supervision and arrange transfer when a patient needs investigations or specialist management that are unavailable. Give a clear handover and do not let a psychiatric label delay treatment for a potentially reversible illness. Respect the person’s language, culture, confidentiality and participation.

Key examination points

“Organic mental disorder” is a broad historical/curriculum term; name the specific syndrome and cause whenever possible.
Acute fluctuating confusion and impaired attention suggest delirium and require urgent investigation for a cause.
Hypoactive delirium can look quiet or sleepy and is easy to miss.
Dementia is acquired cognitive decline interfering with independence; it is not normal ageing. Sudden deterioration may be delirium on top of dementia.
Medicines, substance intoxication or withdrawal, infection, dehydration, glucose or electrolyte changes and brain injury can alter mental state.
Epilepsy is neurological; puerperal psychosis is an emergency; a curriculum grouping does not replace clinical classification.
Treatment focuses on the cause, safety, supportive care, monitoring, communication and follow-up. Medicines are selected and prescribed by an authorised clinician.

Revision questions

Define organic mental disorder and state why the term is not one modern diagnosis.
Compare delirium and dementia by onset, course, attention and reversibility.
List six common causes of acute confusion that nurses should report or help assess.
Describe the nursing care of a patient who develops delirium in a health facility.
Outline safe seizure first aid and identify situations requiring urgent transfer.
Explain why sudden psychosis after childbirth and new confusion in a person with HIV need urgent assessment.
State six nursing actions that support a person living with dementia and their caregiver.

References

World Health Organization. Clinical descriptions and diagnostic requirements for ICD-11 mental, behavioural and neurodevelopmental disorders. WHO, 2024. WHO CDDR.
World Health Organization. Mental Health Gap Action Programme (mhGAP) guideline for mental, neurological and substance use disorders. Third edition, 2023. WHO mhGAP guideline.
Ministry of Health, Uganda. Uganda Clinical Guidelines 2023. Chapter 9: Mental, Neurological and Substance Use Disorders. Uganda Ministry of Health guideline record.
Ministry of Health, Uganda. Teachers’ Guide for Certificate Nursing. Common psychiatric disorders: organic mental disorders. Uganda nursing teachers’ guide.
World Health Organization. Dementia. Fact sheet, 3 July 2026. WHO dementia fact sheet.
World Health Organization. Risk reduction of cognitive decline and dementia: WHO guidelines, second edition. 2026. WHO risk-reduction guideline.

Educational note: These notes support nursing revision and do not replace clinical assessment, supervision, current Uganda Ministry of Health guidance or facility protocols. For acute confusion, seizure, severe agitation, reduced consciousness or postpartum psychosis, activate the local emergency/referral pathway promptly.