Post-Surgical ICU Care

Our Approach In Managing Post-Surgical ICU Care

Every patient arriving in the surgical ICU comes with a known procedure, a known intraoperative course, and a predictable risk profile for specific complications. Our post-operative critical care specialist team in Mumbai, India uses this information to anticipate - not just respond. A cardiac surgery patient who required prolonged bypass is at high risk of atrial fibrillation, low cardiac output, and AKI. A major abdominal resection patient is at risk of anastomotic leak, ileus, and pulmonary atelectasis. The care is customised before the complication happens.
 

1. Admission Assessment & Handover

The surgical ICU handover is a clinical transfer of responsibility - not a brief summary.

• Structured handover: procedure performed, intraoperative findings, estimated blood loss, fluid balance, vasopressor and anaesthetic agents used, antibiotic timing, intraoperative complications
• Immediate admission vitals: HR, BP, SpO2, respiratory rate, temperature, urine output, drainage output
• 12-lead ECG for cardiac surgical patients - immediately post-admission baseline
• ABG within 30 minutes of admission - assesses ventilation, oxygenation, lactate, and metabolic status
• Point-of-care ultrasound (POCUS) - cardiac function, lung assessment, volume status

2. Haemodynamic Monitoring & Management

• Arterial line - continuous BP monitoring in all post-major-surgery ICU patients; blood sampling without repeated venipuncture
• Central venous catheter - CVP monitoring, vasopressor administration, fluid management
• Advanced cardiac monitoring - PICCO, oesophageal Doppler, or pulmonary artery catheter for post-cardiac surgery patients with impaired function
• Vasopressor management - Noradrenaline for post-operative hypotension; Dobutamine for low cardiac output; Vasopressin for vasodilatory states after prolonged bypass or anaphylaxis
• Post-operative monitoring of cardiac output and systemic vascular resistance guides fluid and vasopressor decisions more accurately than CVP alone

3. Respiratory Management & Ventilator Weaning

Ventilator weaning after surgery is the most common activity in the surgical ICU and must be systematic.

• Lung-protective ventilation during the immediate post-operative period - 6–8ml/kg tidal volume, PEEP 5–8 cmH2O, SpO2 target 94–98%
• Spontaneous Breathing Trial (SBT) - initiated when patient is haemodynamically stable, vasopressors minimal, conscious and cooperative, FiO2 ≤0.40; T-piece or low-level pressure support trial for 30 minutes
• Extubation criteria: passes SBT, protective cough and gag reflex present, secretions manageable, GCS ≥13
• Post-extubation support - HFNC or NIV as bridge; reduces re-intubation rates in high-risk patients
• Pulmonary physiotherapy - incentive spirometry, early mobilisation, positioning; surgical complication prevention for atelectasis and pneumonia
• Tracheostomy - for patients anticipated to require >14 days ventilation; reduces ICU complications and sedation requirements

4. Pain Management & Sedation

Adequate analgesia is not comfort care - it is physiology. Pain drives tachycardia, hypertension, splinting (breathing against chest or abdominal pain), and oxygen consumption.

• Multimodal analgesia - IV Paracetamol, NSAIDs (where renal function permits), opioids at lowest effective dose
• Epidural analgesia - gold standard for thoracic and abdominal surgery; superior analgesia with reduced systemic opioid requirement
• Regional nerve blocks - particularly for thoracic surgery (serratus anterior block, PECS II) and orthopaedic procedures
• RASS sedation score targeting 0 to -2 - lightest effective sedation; daily SAT (Spontaneous Awakening Trials)
• Delirium prevention and management - ABCDEF bundle: Assess, Both SAT and SBT, Choose minimal sedation, Delirium management, Early mobility, Family engagement

5. Surgical Complication Prevention & Detection

Surgical complication prevention requires knowing what to look for and when.

• Bleeding - hourly drain output monitoring; thresholds for re-exploration vary by procedure
• Anastomotic leak - days 5–7 post-bowel surgery; fever, rising CRP, drain fluid amylase, CT with contrast
• Surgical site infection - daily wound inspection; culture swabs for any signs of erythema or discharge
• Venous thromboembolism - LMWH DVT prophylaxis from 12–24 hours post-operatively; early ambulation
• Acute kidney injury - hourly urine output, creatinine every 12–24 hours; dose-adjust all medications
• Ileus - enteral nutrition initiation within 24 hours accelerates return of bowel function; avoid excess opioids
• Post-cardiac surgery atrial fibrillation - continuous rhythm monitoring; beta-blockers and amiodarone for rate and rhythm control

6. Early Mobilisation & ICU Discharge Planning

• ABCDEF bundle - systematic early rehabilitation from ICU day 1 reduces ICU stay, delirium, and long-term functional impairment
• Physiotherapy from ICU day 1 - passive range of motion progressing to active sitting, standing, and walking
• ICU discharge criteria - haemodynamically stable without vasopressors, breathing independently or on minimal support, pain controlled on oral medications, tolerating enteral feeds
• Step-down to HDU rather than direct ward transfer where possible - intermediate monitoring for 24–48 hours post-ICU