The hours and days after surgery are when many complications first appear: bleeding, breathing problems, low blood pressure, uncontrolled pain, nausea, infection, blood clots and confusion. Post-operative nursing care is about recognising these early, keeping patients comfortable and safe, and helping them recover and go home as quickly as possible. This guide covers immediate recovery, the first 24 hours on the ward, ongoing care, common complications, and discharge teaching.
Imagine receiving a patient back from theatre after a laparotomy. The handover is quick, the patient is drowsy, and you have three other patients waiting. Two hours later, her pulse has crept up from 88 to 118, her blood pressure has dropped and her wound dressing is heavy. Because you checked the right things at the right time, you spot internal bleeding early and escalate. That is post-operative nursing at its best.
Always follow your hospital’s post-operative protocols, the surgical and anaesthetic team’s instructions, and your local early warning score policy.
Receiving a patient from theatre or recovery
A safe handover from the recovery (post-anaesthesia care unit) nurse should include:
- The operation performed and type of anaesthesia (general, spinal, epidural or regional block).
- Intra-operative events: blood loss, complications, fluids and blood products given.
- Current observations, airway status, oxygen requirement and pain scores.
- Analgesia given and prescribed, including patient-controlled analgesia (PCA) or epidurals.
- Drains, catheters, nasogastric tubes, wounds and dressings.
- Specific instructions: positioning, mobilisation, diet, VTE prophylaxis, antibiotics and when to escalate.
- Allergies, comorbidities and resuscitation status.
Before you accept the patient, check their identity band, perform a quick ABCDE assessment and make sure you have oxygen, suction and monitoring ready.
The ABCDE post-operative assessment
- A – Airway: is it clear? Watch for snoring, gurgling or stridor in drowsy patients.
- B – Breathing: respiratory rate, oxygen saturation, chest expansion and breath sounds. Opioids and anaesthetic agents can depress breathing.
- C – Circulation: pulse, blood pressure, capillary refill, skin colour and temperature, wound and drain losses, urine output and fluid balance.
- D – Disability: level of consciousness (ACVPU or GCS), pain score, blood glucose, and sensation and movement after spinal or epidural anaesthesia.
- E – Exposure: wound sites, dressings, drains, temperature, pressure areas and signs of bleeding.
Calculate an early warning score with every set of observations. See our guides to NEWS2 and the Glasgow Coma Scale.
Frequency of observations
Observation frequency is set by local protocol and the patient’s condition. A common pattern after major surgery is very frequent observations on return to the ward, such as every 15 to 30 minutes for the first hour or two, then gradually less often as the patient stabilises, with any rise in the early warning score prompting more frequent checks and escalation. Patients with epidurals, PCAs or high-risk surgery need additional monitoring as specified in their care plan.
Pain management
- Assess pain regularly using an appropriate scale, at rest and on movement, and after each intervention.
- Give prescribed analgesia on time; regular simple analgesia such as paracetamol is often combined with other medicines in a multimodal approach.
- Monitor for opioid side effects: sedation, respiratory depression, nausea, itching and constipation. Use a sedation score where required.
- Check PCA and epidural pumps, sites and sensory levels according to protocol.
- Use non-drug measures: positioning, splinting the wound when coughing, reassurance and early mobilisation.
Good pain control is essential for deep breathing, coughing and mobilising, all of which prevent complications. See our acute pain care plan.
Post-operative nausea and vomiting (PONV)
Nausea and vomiting are common and distressing after surgery. Give prescribed antiemetics, encourage slow sips of fluid when allowed, keep a vomit bowl and mouth care within reach, and position the patient safely to prevent aspiration. Persistent vomiting can cause dehydration and electrolyte imbalance and may signal ileus or obstruction.
Fluid balance, urine output and nutrition
- Keep an accurate fluid balance chart, including IV fluids, oral intake, drains, nasogastric losses, vomit and urine. See our guide to fluid balance charts.
- Monitor urine output; a commonly used minimum is about 0.5 mL/kg/hour in adults. Low output can be an early sign of hypovolaemia or kidney injury.
- Check for urinary retention, especially after spinal anaesthesia or opioids; use a bladder scanner if available. See acute urinary retention.
- Restart oral intake as instructed; many enhanced recovery pathways encourage early eating and drinking.
- Monitor blood glucose in patients with diabetes and those receiving steroids.
Wound and drain care
- Inspect dressings for bleeding or leakage; mark and monitor any ooze.
- Leave the initial dressing intact for the time specified unless there are concerns.
- Record drain type, volume and character of output; report sudden increases or fresh bleeding.
- Use aseptic technique for wound care and watch for signs of infection: redness, swelling, heat, pus, wound breakdown and fever. See surgical site infection prevention.
Preventing complications
Respiratory complications
Encourage deep breathing exercises, coughing with wound support and incentive spirometry if prescribed. Sit patients upright and mobilise early to prevent atelectasis and pneumonia.
Venous thromboembolism (VTE)
Give prescribed anticoagulant prophylaxis, apply anti-embolism stockings or mechanical devices where indicated, encourage leg exercises, hydration and early mobilisation, and watch for signs of DVT or pulmonary embolism. See VTE prevention.
Haemorrhage and shock
Rising pulse, falling blood pressure, cool peripheries, restlessness, reduced urine output and increasing drain or wound losses can indicate bleeding. Escalate immediately.
Delirium
Older patients are at high risk of post-operative delirium. Reorientate, ensure glasses and hearing aids are available, manage pain, avoid constipation and urinary retention, encourage sleep and involve family.
Ileus and constipation
Monitor bowel sounds, abdominal distension, flatus and bowel movements, especially after abdominal surgery and opioid use.
Pressure injuries and falls
Reposition regularly, check pressure areas, and assess falls risk before first mobilisation, especially after spinal anaesthesia or with postural hypotension.
Common post-operative complications at a glance
| Timing | Complication | Signs to watch |
|---|---|---|
| Immediate (first hours) | Airway obstruction, respiratory depression, haemorrhage, hypotension, PONV | Low SpO₂, slow breathing, rising pulse, falling BP, drowsiness |
| Early (first days) | Pneumonia, atelectasis, urinary retention, delirium, ileus, wound infection, AKI | Fever, crackles, reduced urine, confusion, distension, red wound |
| Later (days to weeks) | DVT, pulmonary embolism, anastomotic leak, wound dehiscence | Calf pain or swelling, sudden breathlessness, abdominal pain, wound breakdown |
Enhanced recovery after surgery (ERAS)
Many hospitals use ERAS pathways, which combine evidence-based measures before, during and after surgery to speed recovery: reduced fasting, carbohydrate drinks before surgery, multimodal analgesia with fewer opioids, early removal of catheters and drains, early eating and drinking, and early mobilisation. Nurses play a central role in delivering ERAS on the ward.
Discharge teaching
- Wound care, signs of infection and when sutures or clips will be removed.
- Pain management and safe use of analgesics.
- Activity limits, driving, lifting and return to work.
- VTE prophylaxis at home if prescribed, including injection technique.
- Diet, bowel care and hydration.
- Warning signs that need urgent help: fever, increasing pain, bleeding, breathlessness, calf swelling, wound discharge or vomiting.
- Follow-up appointments and contact numbers.
Frequently asked questions
What is the main focus of post-operative nursing care?
Early recognition of complications, pain and symptom control, fluid balance, wound care, prevention of complications and preparation for discharge.
What is the first priority after surgery?
Airway and breathing, followed by circulation, using a systematic ABCDE assessment.
How much urine output is normal after surgery?
A commonly used minimum in adults is about 0.5 mL/kg/hour; follow local guidance.
When should patients mobilise after surgery?
As early as safely possible, often on the day of or the day after surgery, according to the surgical plan.
But what if the patient “just doesn’t look right”?
Trust your instinct. Subtle changes, such as new restlessness, a rising respiratory rate or a patient saying “I feel like something is wrong”, often come before obvious deterioration. Repeat observations, examine the patient, and escalate early using SBAR. You will never be criticised for asking for a review of a patient you are worried about.
Your next step: On your next shift, use the ABCDE checklist above for every post-operative patient you receive, and compare it with your unit’s handover form to see what is missing.
Related: Pre-operative preparation checklist · WHO surgical safety checklist · Post-operative care after caesarean section
Sources: NICE guidance on acutely ill adults, perioperative care and VTE prevention; Enhanced Recovery After Surgery (ERAS) Society guidelines; Royal College of Physicians NEWS2. Follow local protocols.
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