Liaison Psychiatry: Mental Health Care in General Medical and Surgical Settings
Liaison psychiatry, also called consultation–liaison psychiatry, is the mental-health service that works within general hospitals and other medical settings to assess and treat psychological, behavioural and cognitive problems associated with physical illness and healthcare. It connects medical, surgical, obstetric, paediatric, emergency and critical-care teams with mental-health expertise.
Aims and scope
- Recognize and manage delirium, depression, anxiety, psychosis, substance withdrawal, self-harm and cognitive disorders in physically ill patients.
- Address psychological reactions to diagnosis, disability, pain, disfigurement, infertility, cancer, HIV, chronic disease and terminal illness.
- Clarify capacity, consent, treatment refusal, complex behaviour, safeguarding and suicide risk.
- Reduce avoidable investigations, prolonged admission and fragmented care through a shared biopsychosocial formulation.
Common referrals
| Referral | Key question | Urgency |
|---|---|---|
| Acute confusion/agitation | Delirium, hypoxia, glucose, infection, medicine/toxin, pain or withdrawal? | Immediate medical assessment. |
| Self-harm/overdose | Medical toxicity, intent, ongoing suicide risk, capacity and safeguarding? | Medical stabilization first; mental-health review before discharge. |
| Treatment refusal | Is information adequate and does the person have decision-specific capacity? | Urgent if delay threatens life. |
| Unexplained physical symptoms | What medical evaluation is complete, and how do beliefs, stress and behaviour maintain disability? | Planned integrated assessment; never dismiss as “all in the mind.” |
| Difficult adjustment | Normal distress, adjustment disorder, depression, PTSD or demoralization? | Based on risk and function. |
Biopsychosocial formulation
The liaison team identifies predisposing factors (previous illness, trauma, vulnerability), precipitating factors (diagnosis, surgery, pain, loss), perpetuating factors (poor sleep, avoidance, conflict, untreated symptoms) and protective factors (support, coping, faith, treatment engagement). This formulation explains the problem and directs interventions better than attaching a psychiatric label alone.
Assessment
- Clarify referral and urgency: speak with the treating team, review notes, observations, investigations and medicines.
- Medical safety: ABCDE, glucose, vitals, pain, oxygenation, infection, neurological signs, intoxication/withdrawal and medicine adverse effects.
- Patient interview: explain role, ensure privacy, explore understanding of illness, symptoms, function, coping, culture, substances and treatment expectations.
- Mental-state/risk: attention, mood, thought, perception, cognition, suicide/self-harm, violence, self-neglect, vulnerability and dependants.
- Collateral: obtain baseline and timeline from family/staff with consent or justified safety basis; distinguish fact from interpretation.
Capacity and treatment refusal
Capacity is specific to the decision and time. Support the person to understand, retain, use/weigh relevant information and communicate a choice. Mental illness, disagreement or an “unwise” decision alone does not prove incapacity. Correct delirium, pain, language barriers, sensory loss and information gaps. If capacity is absent, follow Uganda law and facility policy, act in the person’s best interests/rights, choose the least restrictive option and document reasoning and review.
Management
- Delirium: treat cause, orient, mobilize, restore sleep/sensory aids, hydrate/nourish and avoid unnecessary sedatives/restraints.
- Depression/anxiety: psychoeducation, brief structured psychological care, social support and medicine when indicated, checking organ function and interactions.
- Self-harm: stabilize poisoning/injury, compassionate psychosocial assessment, means restriction, safety plan and reliable follow-up.
- Medically unexplained/persistent symptoms: validate suffering, give one coherent explanation, schedule regular reviews, restore activity and avoid repetitive harmful testing while monitoring new red flags.
- Substance withdrawal: protocol-based monitoring, thiamine and withdrawal medicine where indicated; integrate relapse treatment.
Psychotropic medicine in physical illness
| Risk | Clinical examples | Nursing action |
|---|---|---|
| Organ impairment | Renal/hepatic disease alters clearance | Check prescribed dose, labs and toxicity; do not assume standard dosing. |
| QT prolongation | Antipsychotic/antidepressant plus cardiac, antimicrobial or electrolyte risks | ECG and electrolyte review; report syncope/palpitations. |
| Bleeding | SSRI with anticoagulant/antiplatelet/NSAID | Review interactions and monitor bleeding. |
| Respiratory/CNS depression | Benzodiazepine with opioid, alcohol or respiratory disease | Avoid unnecessary combinations; monitor RR, SpO₂ and consciousness. |
| Anticholinergic effects | Delirium, constipation, urinary retention | Minimize burden and monitor vulnerable patients. |
Nursing role
| No. | Intervention | Rationale/outcome |
|---|---|---|
| 1 | Detect changes in attention, mood, sleep, behaviour, pain, function and adherence during routine care. | Nurses often recognize deterioration first; outcome is earlier intervention. |
| 2 | Use therapeutic communication, validate distress and give consistent explanations across teams. | Reduces fear, conflict and splitting. |
| 3 | Perform and document dynamic suicide, falls, withdrawal, delirium and safeguarding observations. | Matches supervision to current risk. |
| 4 | Reconcile medicines and monitor physical/psychiatric adverse effects. | Prevents interaction and diagnostic confusion. |
| 5 | Coordinate discharge: named services, medicines, warning signs, capacity decisions and family plan. | Prevents gaps between hospital, mental-health and community care. |
Revision questions
- Define liaison psychiatry and list ten referral indications.
- Explain decision-specific capacity assessment.
- Develop a liaison plan for delirium after surgery or deliberate overdose.
References
- WHO. mhGAP Guideline, 2023.
- Uganda Ministry of Health. Uganda Clinical Guidelines, 2023.