Regional Anesthesia in ERAS

ERAS & RA Fundamentals - Synergistic Duo

• ERAS (Enhanced Recovery After Surgery):
  • A multimodal, multidisciplinary, evidence-based pathway.
  • Core Goals: Minimize surgical stress, accelerate physiological recovery, reduce LOS & complications.
• RA (Regional Anesthesia) in ERAS:
  • A cornerstone for achieving ERAS objectives.
  • Provides: Superior, targeted analgesia; blunts neuroendocrine stress response.
  • Key Benefits:
    • Significant opioid-sparing effect (↓ PONV, sedation, ileus, respiratory depression).
    • Facilitates early mobilization and return of gut function.
• Synergy: RA is pivotal, enabling multiple ERAS elements for improved patient outcomes.

  ⭐ Thoracic epidural analgesia (TEA) is a cornerstone RA technique in ERAS for major abdominal/thoracic surgery, significantly improving pain control and hastening gut recovery.

RA Modalities in ERAS - The Anesthetist's Toolkit

• Neuraxial Anesthesia: Cornerstone for major surgeries.
  • Epidural (Thoracic/Lumbar): Catheters for continuous analgesia. ↓opioids, ↓ileus.
  • Spinal: Single-shot or continuous. Rapid, dense block.
• Peripheral Nerve Blocks (PNBs): Targeted, opioid-sparing; Ultrasound-Guided (USG) standard.
  • Upper Limb: Interscalene, Supraclavicular.
  • Lower Limb: Femoral, Sciatic, Adductor Canal Block (ACB).
  • Truncal: Paravertebral, Intercostal.
• Fascial Plane Blocks (FPBs): USG-guided, volume-dependent spread.
  • TAP: Anterior abdominal wall.
  • QL (Quadratus Lumborum): Abdominal analgesia (somatic/visceral).
  • ESP (Erector Spinae Plane): Thoracic/abdominal wall.
  • PECS/Serratus Anterior: Chest wall.
• Local Infiltration Analgesia (LIA): Surgeon-administered; common in arthroplasty.

⭐ Adductor canal block post-Total Knee Arthroplasty (TKA) offers analgesia comparable to femoral nerve block but with significantly better quadriceps strength preservation, crucial for early mobilization in ERAS.

RA Benefits & Pathways - Speedy Recovery Catalysts

• Core RA Benefits for ERAS:
  • Opioid Sparing: ↓ opioid-related side effects (e.g., sedation, respiratory depression, PONV, pruritus).
  • Superior Postoperative Analgesia: Lower pain scores, ↑ patient comfort & satisfaction.
  • Facilitates Early Mobilization: Key for VTE prevention, faster overall recovery.
  • Reduced Postoperative Nausea & Vomiting (PONV): Both direct effect & secondary to opioid reduction.
  • Accelerated Return of Bowel Function: ↓ incidence/duration of postoperative ileus.
  • Attenuation of Surgical Stress Response: Modulates neuroendocrine changes.
  • Potential for ↓ hospital Length Of Stay (LOS) & costs.
• RA in Specific ERAS Pathways:
  • Colorectal Surgery: Thoracic Epidural Analgesia (TEA) (e.g., T6-T10), Transversus Abdominis Plane (TAP) blocks, Quadratus Lumborum (QL) blocks.
  • Orthopedic Surgery (TKR/THR): Spinal anesthesia, Epidural, Peripheral Nerve Blocks (PNBs) like femoral, adductor canal, sciatic, iPACK (infiltration between popliteal artery and capsule of knee).
  • Thoracic/Cardiac Surgery: Paravertebral Blocks (PVB), Erector Spinae Plane (ESP) blocks, intercostal nerve blocks.

⭐ Thoracic epidural analgesia (TEA) is a cornerstone in many major abdominal surgery ERAS protocols, offering profound analgesia and sympathetic blockade, which aids early gut recovery and mobilization.

RA Selection & Safety - Prudent Pain Protocol

• Goal: Optimize analgesia, ↓opioids, facilitate recovery.
• Selection Criteria:
  • Patient: Co-morbidities (esp. coagulopathy), consent.
  • Surgery: Type, duration, anticipated pain level.
  • Technique: Epidural, PNBs (e.g., TAP, ESP, QLB), spinal.
• Safety First:
  • Strict asepsis.
  • Ultrasound guidance preferred for PNBs.
  • Monitor for LAST, nerve injury, hematoma.
  • ⚠️ Adherence to anticoagulation guidelines (ASRA) is paramount.

⭐ For neuraxial techniques, specific timing for anticoagulant interruption & resumption is crucial. E.g., LMWH prophylactic dose: wait 10-12 hours before block, restart 4 hours post-catheter removal.

High‑Yield Points - ⚡ Biggest Takeaways

• Reduces opioid consumption and related side effects (nausea, vomiting, ileus).
• Improves postoperative pain control, facilitating early mobilization.
• Common techniques: epidural analgesia, spinal anesthesia, peripheral nerve blocks (PNBs).
• Thoracic epidural analgesia (TEA) is gold standard for major abdominal/thoracic surgery.
• PNBs (e.g., TAP blocks, femoral nerve blocks) are crucial for orthopedic and abdominal surgeries.
• Catheter-based techniques allow prolonged analgesia.
• Contributes to reduced hospital stay and improved patient satisfaction.