13.3 Pleural Effusion, Pulmonary Oedema and Postoperative PPC

Quick Answer: Match fluid compartment to action: pleural effusion compresses from outside (support residual lung; medical drainage when large); cardiogenic pulmonary oedema is stop–upright–oxygen–urgent medical care (not postural drainage); PPC prevention after abdominal/thoracic surgery is early mobilisation + deep breathing + supported cough + pain liaison. With an ICC, keep the system below the chest, prevent traction, and do not clamp casually.

This section links three acute pulmonary themes that often appear together in surgical and medical ward cases: pleural pathology, pulmonary oedema red flags, and prevention of postoperative pulmonary complications (PPC) after abdominal or thoracic surgery—including chest drain precautions. For the APC Written Assessment, success means correct problem identification, safe first actions, and prevention-focused physiotherapy rather than claiming you can aspirate a pleural collection yourself.

Pleural Effusion: Signs and Physio Limits

A pleural effusion is abnormal fluid in the pleural space. Causes include heart failure, infection (parapneumonic effusion/empyema pathway), malignancy, postoperative collections, hypoalbuminaemia, and pulmonary embolism–related effusions. Size and cause determine medical management (observation, diuretics if cardiogenic, drainage, antibiotics, oncology pathways).

Clinical signs you should recognise

• Progressive dyspnoea and reduced exercise tolerance
• Reduced chest expansion on the affected side
• Dull percussion and markedly reduced breath sounds over the fluid
• Possible tracheal deviation away from a very large effusion (space-occupying effect)
• Pleuritic pain in some inflammatory effusions
• Hypoxaemia if large or if underlying lung disease coexists

Physiotherapy implications

• Large effusions cause extrinsic compression and atelectasis of adjacent lung; breathing exercises help residual expandable lung but will not “drain” litres of fluid
• After therapeutic drainage (aspiration/ICC), patients often improve quickly—then progress mobility and volume recruitment
• Position for comfort and optimal ventilation; avoid aggressive techniques that increase distress without benefit
• Escalate urgently for sudden severe dyspnoea, tracheal deviation with instability, or suspected tension physiology (more classic for pneumothorax, but acute distress always warrants rapid review)

Related pleural problems (brief map)

• Pneumothorax: air in pleural space; chest pain, dyspnoea, reduced sounds; drains common; physio respects ICC rules
• Haemothorax / complex collections: surgical/medical drainage decisions dominate
• Empyema: infected pleural collection—infection control and medical drainage pathways; limited role for “harder physio” as primary cure

Cardiogenic Pulmonary Oedema: Red Flags First

Pulmonary oedema is fluid accumulation in the alveolar and interstitial spaces. Cardiogenic oedema reflects elevated left atrial / pulmonary venous pressure from left heart failure, acute coronary syndromes, severe hypertension, valve crisis, or fluid overload states. Non-cardiogenic oedema appears in ARDS-spectrum injury—the team distinguishes cause; you recognise acute respiratory distress with oedema features and do not exercise through it.

Red-flag pattern

• Sudden or rapidly worsening dyspnoea, orthopnoea, possible PND history in chronic HF
• Tachypnoea, accessory muscle use, hypoxaemia
• Diffuse crackles, wheeze (“cardiac asthma” theme in some presentations)
• Possible pink frothy sputum in florid cases
• Anxiety, diaphoresis, cool peripheries if low-output shock coexists
• Falling SpO2 during minimal activity or at rest

Immediate physiotherapy-relevant actions

1. Stop exercise / mobility challenge
2. Sit the patient upright if conscious and this is the usual acute nursing position of comfort (coordinate with team)
3. Apply or maintain oxygen as per protocol and prescription
4. Call for urgent medical/nursing help—this is medical management (vasodilators, diuretics, NIV, etc.), not an airway clearance session
5. Do not position head-down or start percussion for “secretions” when the fluid is alveolar oedema

Chronic compensated HF is different (see cardiac chapter): graded exercise is valuable when dry and stable. Acute pulmonary oedema is the opposite end of the spectrum.

Postoperative Pulmonary Complications (PPC)

After major abdominal or thoracic surgery, patients are at risk of atelectasis, pneumonia, aspiration, pleural issues, respiratory failure, and prolonged oxygen need. Risk rises with upper abdominal and thoracic incisions, longer anaesthetic time, smoking history, COPD/asthma, obesity, older age, poor pre-op fitness, inadequate analgesia, and immobility.

Prevention package (entry-level, high yield)

Thoracic surgery adds incision site pain, possible ICC, and restricted shoulder motion protocols in some services. Encourage shoulder range within surgical advice to prevent frozen shoulder while protecting the wound and drain.

Abdominal surgery (especially upper abdominal) impairs diaphragm function. Supported cough and upright posture are essential. Avoid teaching Valsalva-heavy straining without wound support.

Pain-limited technique — what good looks like

• Assess pain score at rest and on deep breath/cough/movement
• Teach wound support before cough practice
• Use sitting rather than flat supine for exercises when allowed
• Split sessions into short frequent bouts
• Coordinate with nursing for timed analgesia (without yourself prescribing drugs)
• If pain prevents any effective breath or mobility, that is a team problem to solve, not a patient “non-compliance” label alone

Chest Drain (Intercostal Catheter) Precautions

Patients after thoracic surgery, pneumothorax, haemothorax, or effusion drainage often have an intercostal catheter (ICC) connected to an underwater seal or digital drainage system.

Rules of safe physiotherapy

• Keep the drainage unit below chest level; do not lift it above the insertion site during transfers
• Prevent traction on the tube; secure tubing before rolling or walking
• Do not clamp routinely unless specifically directed for a procedure by the managing team—clamping can be dangerous in some systems
• Watch for dislodgement: if the tube comes out, follow local emergency procedure (typically cover site, call for help, monitor breathing)—do not improvise reinsertion
• Note nursing observations of swing, bubbling, drainage volume themes; sudden stop of swing with distress, or new massive bubbling with instability, needs urgent review
• Mobilise with enough hands to manage the drain and oxygen
• Shoulder and trunk movement: encourage functional range unless restricted; avoid yanking the tube with sudden abduction if insecure

If a case asks about walking with an ICC: yes when stable and secured, with the system upright/below chest and team awareness—not automatic bed rest for the life of the drain.

Putting It Together: Differential Reasoning Table

Australian Clinical Scenarios

Scenario A — Large right effusion awaiting drainage: dyspnoea, stony dull base, SpO2 91% on 2 L. Plan: position upright, limited activity within tolerance, do not promise re-expansion from ACBT alone, prepare for post-drain rehab, escalate if worsening.

Scenario B — Night of upper abdominal surgery: reluctant to deep breathe due to pain 8/10. Plan: wound support, analgesia liaison, sit out with assistance, short frequent breathing sets—not “come back tomorrow when it hurts less” as the only strategy.

Scenario C — Acute flash pulmonary oedema on HF ward during walk: sudden severe dyspnoea, SpO2 crash, frothy sputum. Plan: stop, upright if appropriate, oxygen per protocol, emergency medical response—not FET cycles.

Scenario D — Day 2 lobectomy with ICC: stable, drain secure. Plan: mobilise with drain management, deep breathing, supported cough, shoulder care within protocol.

APC Traps

• Treating pulmonary oedema with postural drainage and percussion
• Claiming physiotherapy will resolve a massive effusion without drainage
• Clamping chest drains casually to “make walking easier”
• Delaying all post-op mobility until drains are removed
• Ignoring analgesia needs while blaming the patient for shallow breathing
• Missing cardiac chest pain or oedema red flags while focusing on wound exercises only

APC Case Patterns and Competency Links

Common item stems:

• Stony dull base, large effusion, minimal sputum → do not claim ACBT will drain litres; support breathing/mobility and medical drainage plan
• Flash dyspnoea, frothy sputum, crashing SpO2 on HF ward → stop, upright, oxygen per protocol, emergency medical pathway
• Night of upper abdominal surgery, pain 8/10, refuses deep breath → wound support + analgesia liaison + sit-out, not “non-compliant—review tomorrow only”
• Day-2 lobectomy with secure ICC → mobilise with drain below chest, deep breathing, supported cough
• Student offers to clamp ICC “so it doesn’t spill on the walk” → incorrect; clamp only if the managing team specifically directs

Map to Thresholds: differential reasoning (compartment of fluid), urgent escalation for oedema, prevention-focused post-op care, and device safety. Link mentally to the cardiac chapter for compensated HF exercise versus acute oedema, and to the pneumonia/atelectasis section for dry volume-loss logic after surgery.

Preoperative optimisation themes (when stems allow): smoking cessation pathways, prehab walking, and education about post-op breathing/mobility reduce PPC risk conceptually. Entry-level answers still prioritise the post-op package once the patient is on the ward: upright time, frequency of short sessions, and pain-enabled technique beat a single perfect incentive-spirometer number once a day.

Closing Exam Anchor

Effusion compresses from outside the lung; oedema floods from failing left heart pressures; PPC prevention is early upright movement plus pain-supported breathing and cough; chest drains demand respect, not fear-based immobility. Choose the action that matches the fluid compartment and the urgency.