Modified Aldrete Score Calculator

Score ≥ 9 indicates the patient is ready for discharge from PACU. Score each criterion below.

10
Total Score / 10
✓ Ready for PACU Discharge
ScoreInterpretationAction
≥ 9PACU discharge criteria metTransfer to surgical ward per protocol
7 – 8Borderline — continue monitoringReassess every 15 min; address deficient criteria
< 7Not ready for dischargeSenior review; consider HDU / ICU escalation
PACU Admission Checklist

Check each item on patient arrival. Progress is saved automatically.

Anaesthesia Emergence — Assessment & Management
Emergence Agitation
  • Common in children (paediatric emergence delirium) and elderly
  • Triggers: pain, full bladder, residual neuromuscular blockade, hypoxia, hypercapnia
  • Management: ensure adequate analgesia first, reassurance, dim lighting, parental presence in children
  • Propofol or dexmedetomidine for severe agitation per physician order
  • Always exclude hypoxia before sedating an agitated patient
Shivering Management
  • Affects up to 40% of post-GA patients
  • Increases O₂ consumption by up to 300%
  • Apply warm blankets, forced air warming blanket
  • Warm IV fluids (via fluid warmer)
  • Pethidine 25 mg IV (anti-shivering — MO order required)
  • Raise ambient room temperature in PACU
  • Monitor SpO₂ closely — shivering raises O₂ demand
Laryngospasm Alert Stridor on emergence — differentiate laryngospasm (high-pitched inspiratory stridor, desaturation) from secretions. For laryngospasm: jaw thrust, 100% O₂, suction, call anaesthetist. Suxamethonium 0.5–1 mg/kg IV if complete obstruction.
Clinical Alert Any rapid deterioration — escalate immediately using SBAR. Do not delay calling the surgical or anaesthetic team while initiating first-line management.
Respiratory Complications
Post-op Hypoxia (SpO₂ <92%)
Causes: Opioid-induced respiratory depression, atelectasis, aspiration, pulmonary oedema, pneumothorax, bronchospasm, pulmonary embolism
Management of Post-op Hypoxia
1. Sit patient upright 30–45° (improves FRC, reduces atelectasis)
2. Apply supplemental O₂ (start 2–4 L/min via nasal prongs, titrate)
3. Encourage deep breathing exercises + incentive spirometry (10 breaths/h)
4. Suction oropharynx if secretions present
5. Chest physiotherapy for established atelectasis
6. If opioid-induced: naloxone 100–400 mcg IV titrated (MO order) — monitor for resedation
7. CXR if clinical suspicion of pneumothorax or pulmonary oedema
Atelectasis
Most common respiratory complication. Microatelectasis in 90% post-GA. Signs: dull percussion, reduced breath sounds at bases. Rx: early mobilisation, incentive spirometry, CPAP if severe.
Pneumothorax
Consider after central line insertion, rib fracture, or thoracic surgery. Signs: unilateral absent breath sounds, tracheal deviation (tension), hypoxia, hypotension. Urgent CXR → chest drain.
Cardiovascular Complications
ComplicationCommon CausesInitial Management
Hypotension Haemorrhage, spinal anaesthesia vasodilation, myocardial depression, anaphylaxis, PE, hypovolaemia IV fluid bolus 250–500 mL (crystalloid), Trendelenburg if no contraindication, call MO, check Hb, consider vasopressors
Hypertension Uncontrolled pain, full bladder, anxiety, pre-existing HTN, emergence agitation, hypercapnia Treat underlying cause first (analgesia, catheterise), anti-hypertensives per MO order if persistent
Arrhythmias Electrolyte disturbance (↓K⁺, ↓Mg²⁺), hypothermia, pain, residual volatile agents, hypoxia, pre-existing AF 12-lead ECG, correct K⁺/Mg²⁺, ensure adequate O₂, call cardiology/MO if sustained arrhythmia
Myocardial Ischaemia Perioperative stress, tachycardia, anaemia, pre-existing CAD 12-lead ECG, troponin, aspirin 300 mg (if not contraindicated), urgent MO review, O₂ if hypoxic
Temperature Dysregulation
Hypothermia (<36°C) — Very Common Post-GA
  • Impairs coagulation → increased surgical bleeding
  • Increases wound infection risk (vasoconstriction → reduced O₂ delivery)
  • Prolongs drug metabolism (muscle relaxants, sedatives)
  • Triggers shivering → increased O₂ demand
  • Management: Bair Hugger® forced-air warming blanket, warm IV fluids via fluid warmer, warm environment, warm cotton blankets, measure temp every 30 min
Hyperthermia — Key Differentials
Surgical Site Infection / Systemic Sepsis
Temp >38.5°C after 48h. Blood cultures, urine MC&S, wound swab, CBC, CRP. Escalate per sepsis protocol.
Malignant Hyperthermia (MH) — EMERGENCY
Rare autosomal dominant. Triggered by succinylcholine or volatile agents. Signs: rapid temperature rise, masseter rigidity, tachycardia, rising EtCO₂, metabolic acidosis, dark urine (myoglobinuria). Rx: stop trigger immediately, call MH hotline, dantrolene 2.5 mg/kg IV, cold IV fluids, active cooling, ICU.
Post-Operative Nausea & Vomiting (PONV)
Apfel Risk Score
Risk FactorPoints
Female sex+1
Non-smoker+1
History of PONV or motion sickness+1
Post-op opioid use expected+1
Score 0–1: low risk; 2: moderate (39%); 3–4: high risk (61–79%)
PONV Management
  • Ondansetron 4–8 mg IV/PO — 5-HT₃ antagonist, first-line
  • Metoclopramide 10 mg IV — D₂ antagonist, also prokinetic
  • Dexamethasone 4–8 mg IV — anti-inflammatory, given prophylactically at induction
  • Promethazine 12.5–25 mg IV — antihistamine, sedating
  • Ensure adequate hydration (dehydration worsens PONV)
  • Avoid strong opioids where possible — use multimodal analgesia
  • TIVA with propofol reduces PONV vs volatile agents
  • Acupressure P6 (wrist) — evidence-based non-pharmacological
ERAS — Enhanced Recovery After Surgery

ERAS is an evidence-based, multimodal perioperative care pathway that reduces complications, shortens hospital stay, and improves patient outcomes. Nurses are central to every phase.

Pre-operative Phase
Fasting: Clear fluids until 2h before, solids until 6h before (avoid prolonged starvation — causes insulin resistance, anxiety, dehydration)
Carbohydrate loading: 400 mL CHO drink night before + 200 mL 2h pre-op (reduces post-op catabolism, improves insulin sensitivity)
Pre-medication: Oral paracetamol, celecoxib, gabapentin (multimodal pre-emptive analgesia), antiemetic prophylaxis
Patient education: Explain ERAS pathway, expected milestones, discharge goals
Prehabilitation: Exercise, nutritional optimisation, smoking cessation ≥4 weeks pre-op
Intra-operative Phase
Anaesthesia: Short-acting agents (propofol TIVA, remifentanil, desflurane), BIS monitoring, avoid excessive opioids
Fluid management: Goal-directed fluid therapy (GDT) — use cardiac output monitoring; avoid fluid overload (causes ileus, oedema) and hypovolaemia
Normothermia: Forced air warming, warm IV fluids, theatre temperature ≥21°C
Surgical technique: Minimally invasive (laparoscopic/robotic) preferred; short incisions reduce post-op pain and pulmonary splinting
Multimodal analgesia: Wound infiltration, TAP/rectus sheath blocks, spinal opioids — reduce systemic opioid requirement
Post-operative Phase
Analgesia: Regular paracetamol + NSAID (if no contraindication) ± regional block; opioids as rescue only
Oral intake: Encourage sips/clear fluids within 2–4h; progress to normal diet day 1 if tolerating; avoid routine NG tubes
Catheter removal: Urinary catheter out by day 1–2 (prevents UTI, facilitates mobilisation)
IV fluid cessation: Transition to oral fluids ASAP; IV fluids cause fluid overload and delay mobilisation
Drain removal: Remove drains early if output <50 mL/24h; prolonged drains not evidence-based in most surgeries
Mobilisation: See mobilisation protocol below
Early Mobilisation Protocol
PACU
Head of Bed Up
30–45°, deep breathing, leg exercises, foot pumps
Day 0
Sit Out of Bed
Dangle legs, chair × 2 sessions if haemodynamically stable
Day 1
Stand & Walk
Walk to corridor with nurse, remove catheter, discontinue IV
Day 2+
Progressive
Independent ambulation, stairs, prepare for discharge
Before Mobilising — Safety Check Adequate analgesia given (NRS ≤3) · Postural hypotension excluded (sit→stand BP) · IPC/TED stockings worn · Drains/catheters secured · Nurse/physio present for first mobilisation
Specialty ERAS Pathways
SurgeryKey ERAS ElementsTypical LOS
Colorectal Oral bowel prep avoided (or PEG-ELS only), early feeding day 0, epidural/TAP block, laparoscopic approach, avoid NG tube 2–3 days (vs 7+ traditional)
Hepatic / HPB Thoracic epidural, goal-directed fluids, low CVP intra-op, early drain removal if bile-negative, physiotherapy 3–5 days
Orthopaedic (Hip/Knee) Spinal anaesthesia preferred, TXA to reduce blood loss, same-day mobilisation, multimodal (femoral nerve/adductor canal block), VTE prophylaxis critical 1–2 days (hip) / 1–3 days (knee)
Gynaecological Laparoscopic preferred, TAP block, anti-sickness protocol (PONV high risk), early catheter removal, same-day discharge for minor procedures 0–2 days
Cardiac Fast-track extubation (<6h), early physiotherapy, early catheter out, sternal precautions, cardiac rehab referral 4–7 days
ERAS Nurse Champion Role
Education
Pre-admission clinic: explain pathway, fasting rules, CHO loading, expected day of discharge, home care needs. Reduce anxiety through clear expectation-setting.
Compliance Tracking
ERAS nurse audits element compliance daily (fasting times, catheter removal, early diet, analgesia adherence). Feeds back to MDT. Identifies delays and escalates.
Mobilisation Facilitation
Coordinates with physio and ward staff. Ensures analgesia before mobility. Documents achievements. Coaches patient and family on home exercise programme.
Wound Assessment — REEDA Scale
R
Redness
Erythema around wound edges
E
Oedema
Swelling and tissue induration
E
Ecchymosis
Bruising / discolouration
D
Discharge
Type, amount, odour of exudate
A
Approximation
Wound edge alignment / gaps
Wound Classification
ClassDescriptionSSI RiskExamples
Class I — CleanNon-infected, no inflammation, no GI/GU entry<2%Hernia repair, hip replacement
Class II — Clean-ContaminatedControlled entry into GI/GU/respiratory tract3–10%Cholecystectomy, appendicectomy (non-perforated)
Class III — ContaminatedGross spillage, open traumatic wounds <4h10–20%Perforated appendix, penetrating trauma
Class IV — DirtyPre-existing infection, devitalised tissue, faecal contamination>25%Perforated diverticulitis, abdominal abscess drainage
Drain Types & Management
Closed Suction Drain (Redivac® / Jackson-Pratt)
Mechanism: negative-pressure vacuum suction
Management: measure and document output every 4–8h; compress/re-evacuate bulb to maintain suction; keep below wound level; label tubing; assess output colour and consistency
Removal: when output <30–50 mL per 8h shift (per surgical team guidance)
Open Drain (Penrose / Corrugated)
Mechanism: passive dependent drainage along outer wall
Management: large absorbent dressing; change when saturated; ensure drain does not retract into wound (secure with safety pin or disc); measure drainage on dressing
Use: biliary, perirectal, subcutaneous abscess cavities
T-Tube (Kehr's Tube) — Biliary Drainage
Post-cholecystectomy / CBD exploration
Expected bile output: 200–500 mL/day (reduces over time)
Document colour: golden yellow = normal; dark green = concentrated; blood-stained = haemobilia
Clamping trial: gradually clamp 2–6h/day before removal (day 7–10); monitor for abdominal pain and jaundice
T-tube cholangiogram performed before removal to confirm CBD clearance
Wound VAC (NPWT — Negative Pressure Wound Therapy)
Indication: complex wounds, open abdomen, dehisced wounds, skin graft preparation
Mechanism: polyurethane foam + occlusive drape + continuous or intermittent suction (−80 to −125 mmHg)
Management: check seal integrity every shift; document canister volume; change dressing every 48–72h (or per protocol); assess wound bed at change; ensure adequate analgesia before dressing change
Surgical Site Infection (SSI) Prevention
  • Prophylactic antibiotics within 60 min of incision (30 min for fluoroquinolones/vancomycin)
  • Repeat intra-op dose if procedure >4h or blood loss >1.5 L
  • Hair removal: clippers NOT razors (razor microabrasions increase infection risk)
  • Normoglycaemia: BGL <10 mmol/L perioperatively (hyperglycaemia impairs neutrophil function)
  • Normothermia: hypothermia reduces tissue O₂ tension and impairs healing
  • Chlorhexidine-alcohol skin prep (superior to povidone-iodine)
  • Sterile technique and barrier precautions throughout
  • Draping: iodine-impregnated incise drape for high-risk cases
Abdominal Compartment Syndrome
IAP >20 mmHg = Abdominal Compartment Syndrome Signs: oliguria (<0.5 mL/kg/h), rising airway pressures, tense abdomen, haemodynamic instability
Diagnosis: bladder pressure measurement (Foley + transducer)
Management: head of bed ≤30°, nasogastric decompression, sedation/analgesia, neuromuscular blockade, surgical decompression (decompressive laparotomy) if refractory
Anastomotic Leak (Bowel Surgery)
  • Peak incidence: day 3–7 post-op
  • Signs: fever, tachycardia, raised WCC/CRP, abdominal pain, failure to progress
  • Drain output: faeculent or turbid
  • CT with contrast = investigation of choice
  • Management: NBM, IV antibiotics, IR drainage vs re-operation
Surgery-Specific Post-Op Complications
SurgerySpecific ComplicationRecognitionAction
Hysterectomy Vault haematoma, bladder injury, ureteric injury PV bleeding, haematuria, flank pain, oliguria Ultrasound / CT, urology review, strict fluid balance
Appendicectomy Stump leak, pelvic abscess, port-site hernia (lap) Fever day 3–5, abdominal pain, ileus CT abdomen/pelvis, antibiotics, IR drainage vs re-op
THR / TKR Prosthetic dislocation (THR), DVT/PE, wound haematoma Hip: pain + shortened/externally rotated leg; DVT: calf swelling X-ray, ortho review; Doppler USS for DVT; LMWH prophylaxis
Bowel Resection Anastomotic leak, ileus, wound dehiscence Day 3–7 fever, tachycardia, abdominal distension CT contrast enema, NGT, NBM, surgical review
Cholecystectomy Bile duct injury, bile leak, port-site bleeding Jaundice, bilious drain output, RUQ pain, bile ascites LFTs, MRCP / ERCP, hepatobiliary surgery review
VTE Risk Stratification & Prophylaxis
Caprini Risk Score (Simplified)
1Minor surgery (<45 min), age 41–60, varicose veins, history of prior major surgery
2Major surgery (>45 min), age 61–74, malignancy, arthroscopic surgery, BMI >25
3Age ≥75, prior DVT/PE, thrombophilia, factor V Leiden, antiphospholipid syndrome
5Stroke, multiple trauma, spinal cord injury, elective total joint arthroplasty
Prophylaxis by Risk
  • Low (0–1): Early ambulation only
  • Moderate (2): Mechanical (IPC/TED) ± LMWH
  • High (3–4): LMWH + mechanical prophylaxis
  • Highest (≥5): Extended LMWH (28–35 days), consider fondaparinux
Pharmacological Prophylaxis
Enoxaparin (Clexane®) — Standard LMWH
Dose: 40 mg SC once daily (standard prophylaxis)
Timing: start 6–12h post-op (12h post-op if high bleed risk)
Duration: until fully mobile (min 7–10 days); extended 28–35 days for THR, colorectal cancer
Monitoring: routine anti-Xa monitoring not required for standard dose
Adjust: renally dosed — CrCl <30 mL/min → switch to UFH or reduce dose (specialist input)
LMWH Contraindications / Switch to UFH
Active bleeding or high surgical bleed risk (24–48h post-op)
CrCl <30 mL/min (UFH: 5000 units SC TDS instead)
HIT (heparin-induced thrombocytopenia) — use argatroban/fondaparinux
Epidural catheter in situ (check timing — 12h before insertion, 4h after removal)
Mechanical VTE Prophylaxis
TED Stockings (Anti-Embolic Stockings)
  • Apply BEFORE induction of anaesthesia (legs elevate during GA)
  • Measure calf circumference and length (floor to popliteal fossa for below-knee; to gluteal fold for thigh-high)
  • Below-knee stockings most commonly used (easier to fit, equivalent to thigh-high for most patients)
  • Contraindications: peripheral arterial disease (ABPI <0.8), severe leg oedema, local skin conditions, DVT already present
  • Remove once daily to inspect skin; reapply after assessment
  • Replace if stretched, rolled down, or soiled
IPC / SCD (Pneumatic Compression Devices)
  • Sequential pneumatic compression of calf and thigh increases venous return by 60%
  • Apply pre-induction; continue until patient is fully ambulatory
  • Activate device as soon as patient positioned on table
  • Contraindications: acute DVT in that limb, arterial insufficiency, severe cellulitis, open wound on limb
  • Ensure wraps fit snugly but not so tight as to impair circulation
  • Document compliance — record hours worn per shift
Clinical Reminder Early ambulation is the single most effective VTE prevention strategy. Mechanical devices are adjuncts — do not substitute for getting the patient out of bed.
Pulmonary Embolism — Recognition & Immediate Action
Wells Score for PE (Simplified)
Clinical FeaturePoints
Clinical signs/symptoms of DVT+3
PE more likely than alternative diagnosis+3
HR >100 bpm+1.5
Immobilisation >3 days or surgery <4 weeks+1.5
Prior DVT or PE+1.5
Haemoptysis+1
Active malignancy+1
≤4: PE unlikely; >4: PE likely → CTPA
Immediate PE Management
  • Call MO/RRT immediately — do not wait for confirmatory tests
  • High-flow O₂ via non-rebreather mask (15 L/min)
  • IV access ×2; bloods: D-dimer, FBC, coag, troponin, BNP, ABG
  • 12-lead ECG (S1Q3T3, sinus tachycardia, RBBB — non-specific)
  • CTPA (definitive) or bedside echo if haemodynamically unstable
  • If massive PE + haemodynamic collapse: systemic thrombolysis (alteplase) or surgical embolectomy
  • Anticoagulation: LMWH therapeutic dose (1.5 mg/kg daily or 1 mg/kg BD) or heparin infusion
Post-Operative Care — Knowledge Quiz (10 MCQs)

Test your knowledge. Select one answer per question, then submit to see your score.

1. What Modified Aldrete Score indicates that a patient is ready for PACU discharge?
2. A patient scores 2 on the Aldrete "O₂ saturation" criterion. What does this indicate?
3. Which of the following is the FIRST-LINE pharmacological treatment for PONV?
4. According to ERAS guidelines, clear fluids should be stopped how many hours before elective surgery?
5. A female patient is a non-smoker, has a history of motion sickness, and is expected to receive post-op opioids. What is her Apfel PONV score?
6. Which clinical finding is MOST specific for anastomotic leak following bowel surgery?
7. Standard prophylactic enoxaparin dose for VTE prevention in a surgical patient with normal renal function is:
8. Malignant hyperthermia is triggered by which of the following agents?
9. What is the normal expected bile output range from a T-tube drain in the first 24–48 hours post-cholecystectomy?
10. When should anti-embolic (TED) stockings be applied for a patient undergoing elective surgery?
Your Score
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