Agitation on postoperative day two after hip fracture surgery
A 54-year-old man is on day two after open reduction and internal fixation of a right hip fracture. He drinks eight beers daily and has done for twenty years; his last drink was four days ago, before admission. He is also on tramadol and enoxaparin. Overnight he becomes agitated and disoriented, pulling at his intravenous line, sweating, with a coarse tremor. He does not recognise the nurse and repeatedly tries to climb out of bed, saying he needs to leave. Observations: pulse 124, blood pressure 172/98 mmHg, temperature 38.1 C, respiratory rate 24, oxygen saturation 93% on room air. Capillary glucose 142 mg/dL. He is not able to answer questions coherently and is thrashing intermittently.
1. What is your differential diagnosis, and what will you do in the first thirty minutes, in priority order?
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Differential: alcohol withdrawal with progression to delirium tremens (last drink four days ago fits the 48-96 hour window); sepsis from urinary, wound or chest source; hypoxia from pulmonary embolism or atelectasis; hepatic encephalopathy; hypoglycaemia; intracranial event; medication effect (tramadol, opioids); less likely serotonin syndrome or neuroleptic malignant syndrome given the history.
First thirty minutes:
- Airway, breathing, circulation: oxygen, continuous saturation and cardiac monitoring, intravenous access, glucose checked (done).
- Give intravenous thiamine 100 mg before any glucose-containing fluid; check magnesium, potassium, renal and liver function, full blood count, lactate, blood gas.
- Culturally sensitive but immediate: urine dipstick and culture, chest radiograph, wound inspection, blood cultures if febrile.
- Treat the withdrawal syndrome empirically with a benzodiazepine while the workup proceeds; do not delay treatment awaiting results.
- Reduce stimulation, one-to-one nursing, and remove or secure lines where safe.
The key judgement is treating a treatable cause rather than simply sedating an agitated patient.
2. He needs sedation. Justify your agent choice, and explain why haloperidol alone would be a mistake.
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Benzodiazepines are first line for alcohol withdrawal delirium because they restore GABAergic tone, which is what withdrawal has removed. Use a symptom-triggered regimen with a validated scale, or fixed-dose if the patient cannot be reliably scored, with doses titrated to calm but rousable. Monitor respiratory rate and sedation level closely, especially with concomitant opioid.
Why haloperidol alone is wrong here:
- It does not treat the underlying withdrawal and lowers the seizure threshold.
- It impairs thermoregulation and can prolong the QT interval, which matters in a patient with electrolyte disturbance and tachycardia.
- It risks masking delirium rather than resolving it, and can worsen agitation and dystonia.
Adjuncts only after benzodiazepines are optimised: phenobarbital or dexmedetomidine in a monitored setting, with senior and critical care input. Escalate to a high-dependency area if he needs repeated large doses or develops respiratory compromise.
3. He demands to leave and tries to get out of bed. How do you approach capacity, restraint, and documentation?
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Capacity is decision-specific and must be assessed, not assumed. Because of delirium he is likely unable to understand, retain, weigh or communicate a decision about leaving now, but I must document the assessment rather than assert it.
Practical approach:
- Use the least restrictive option: verbal de-escalation, familiar faces, a one-to-one nurse, reorientation, treating pain and withdrawal, and involving family or a friend.
- Use physical restraint only when there is an imminent risk of serious harm, for the shortest time, with frequent review, monitoring of circulation and breathing, and removal as soon as possible.
- Consider one-to-one observation and a low bed or bed alarm before restraints.
- Sedation must be treatment, not convenience.
- Document the clinical reasoning, alternatives tried, who was involved, and the review plan, and follow local mental health and capacity legislation.
- Tell the patient afterwards what happened and why; restore trust.
The professional failure to avoid is a sedated, unheard patient with no documented reasoning.