Anesthesia Management Standard for Adult CABG Surgery
Pre-operative Medication Management
Continue aspirin 100-325 mg daily up to and including the day of surgery to reduce operative morbidity and mortality, despite a modest increase in bleeding risk 1.
Antiplatelet Agent Timing
- Clopidogrel and ticagrelor: Discontinue at least 5 days before elective CABG to limit blood transfusions 1, 2
- Prasugrel: Discontinue at least 7 days before surgery due to higher CABG-related major bleeding (13.4% vs 3.2% with clopidogrel) 1
- For urgent CABG: Clopidogrel and ticagrelor may be stopped just 24 hours before surgery to reduce major bleeding complications, though this increases transfusion risk 1, 2
- Glycoprotein IIb/IIIa inhibitors: Stop eptifibatide or tirofiban 2-4 hours before surgery; stop abciximab at least 12 hours before surgery 1, 3, 2
Other Pre-operative Medications
- Statins: Continue at current dose through surgery—discontinuation is harmful 3. Do NOT initiate statin therapy shortly before elective CABG due to associated acute kidney injury risk 4
- Beta-blockers: Administer for at least 24 hours before CABG to all patients without contraindications to reduce postoperative atrial fibrillation 3, 4
- ACE inhibitors/ARBs: The safety of continuing these perioperatively is uncertain due to risk of severe hypotension after cardiopulmonary bypass and vasoplegia syndrome 2, 1. Consider holding on day of surgery 1
Intra-operative Monitoring
Establish comprehensive monitoring before induction 1:
- Central venous access: Mandatory for all CABG patients 1
- Arterial line pressure monitoring: Pre- and post-oxygenator during CPB 4
- Continuous ECG monitoring: Class I recommendation for arrhythmia detection 2
- ST-segment monitoring: Reasonable intraoperatively for ischemia detection 2
- Temperature monitoring: Multiple sites simultaneously to avoid regional hyperthermia 4
- Transesophageal echocardiography (TEE): Recommended unless absolute contraindication exists 4
- Pulmonary artery catheter: Consider in selected high-risk cases to reduce hospital length of stay 4
During Cardiopulmonary Bypass
- Blood flow monitoring: Ultrasonic measurement on arterial line 4
- Continuous SvO2 and hematocrit monitoring 4
- Blood gas analysis: At regular intervals or continuous measurement 4
- Oxygenator arterial outlet temperature: Continuous monitoring 4
Anesthetic Technique
Use volatile halogenated anesthetics with opioid supplementation as the primary technique 1, 5.
Induction Agents
- Benzodiazepines for premedication or induction 1
- Propofol or etomidate for induction 1
- Nondepolarizing neuromuscular blockers: Prefer intermediate-acting, nonvagolytic agents over pancuronium to facilitate early extubation 1
Maintenance Anesthesia
- Volatile anesthetics (e.g., sevoflurane, isoflurane) provide myocardial protection during ischemia-reperfusion 1, 6
- Opioids: Relegated to adjuvant role in modern practice 1
- During CPB: Low concentrations of volatile anesthetic via venous oxygenator for amnesia and systemic vascular resistance reduction 1
Sevoflurane combined with intravenous agents effectively adjusts β-endorphin levels and reduces oxidative stress response compared to fentanyl-propofol alone 6.
Cardiopulmonary Bypass Management
Myocardial Protection
Tailor myocardial protective strategies based on patient clinical conditions and procedural complexity rather than using a fixed institutional cardioplegic solution 4.
- Blood cardioplegia: Consider in selected patients to reduce hemodilution and bleeding 4
- Remote ischemic preconditioning (RIPC): Consider in patients anesthetized with volatile agents to improve clinical outcomes and reduce myocardial and kidney injury 4
Ultrafiltration
Use modified ultrafiltration (MUF) or conventional ultrafiltration combined with MUF in high-risk or anemic patients to reduce chest tube bleeding and blood transfusions 4.
Hemodynamic Management
- Close interaction between anesthesiologist and surgeon during heart manipulation, vascular cannulation, and CPB weaning 1
- For off-pump CABG: Anticipate hemodynamic changes from heart displacement and stabilizer application; manage heart rate, cardiac output, and systemic vascular resistance appropriately 1
Postoperative Ventilation Strategy
Direct anesthetic management toward early postoperative extubation and accelerated recovery in low- to medium-risk patients undergoing uncomplicated CABG 1, 7.
Early Extubation Criteria
- Patient alertness and responsiveness 7
- Stable hemodynamics 7
- Adequate oxygenation (SpO₂ >95%) 7
- Minimal bleeding 7
- Normal chest radiography and blood gas analysis 7
On-table extubation is feasible and safe in selected patients, reducing ICU stay without increasing reintubation risk 7.
Multimodal Analgesia
Regional Anesthesia Techniques
For adults undergoing open cardiothoracic surgeries including CABG, use fascial plane blocks to reduce pain and opioid requirements in the first 24 hours postoperatively (Strong recommendation, Moderate evidence) 8.
- Erector spinae plane block (ESPB) at T4 level provides effective analgesia and hemodynamic stability, facilitating early extubation 7
- Fascial plane blocks also improve patient satisfaction 8
Systemic Analgesia
Effective pain management depends on adequate pain assessment, appropriate analgesic selection, and evaluation of pain relief effects 9.
- Opioid analgesics: Titrate carefully to avoid oversedation while providing adequate analgesia 9
- Non-opioid analgesics: Incorporate as part of multimodal approach 9
- Patient-controlled analgesia: Consider for postoperative pain management 9
Common pitfall: Patients often request more sedatives and analgesics than needed; careful assessment prevents oversedation 9.
Postoperative Care Recommendations
Immediate Postoperative Period
If aspirin was not given preoperatively, initiate 100-325 mg within 6 hours postoperatively and continue indefinitely to reduce saphenous vein graft closure and adverse cardiovascular events 1, 3, 2, 3.
Statin Therapy
All patients undergoing CABG should receive statin therapy unless contraindicated 1, 3, 2, 3.
- Target LDL cholesterol <100 mg/dL with at least 30% reduction 1, 3, 2
- For very high-risk patients: Target LDL <70 mg/dL 2, 3, 2
- Do NOT discontinue statins before or after CABG in patients without adverse reactions 3
Beta-Blocker Management
Reinstitute beta-blockers as soon as possible after CABG to reduce incidence and clinical sequelae of atrial fibrillation 3.
- Continue for all patients without contraindications 3
- Intravenous administration is reasonable in clinically stable patients unable to take oral medications 1
- Chronic beta-blocker users must continue therapy perioperatively to prevent postoperative arrhythmias 4
ACE Inhibitor/ARB Management
Reinstitute ACE inhibitors or ARBs postoperatively once the patient is stable, unless contraindicated 1, 3.
- Initiate and continue indefinitely in patients with LVEF ≤40%, hypertension, diabetes mellitus, or chronic kidney disease who were not receiving them preoperatively 1
- Reasonable to initiate in all low-risk CABG patients postoperatively 1
- Caution: Safety of initiating before hospital discharge is not well established 1
Glycemic Control
Use continuous intravenous insulin to achieve and maintain early postoperative blood glucose ≤180 mg/dL while avoiding hypoglycemia to reduce adverse events including deep sternal wound infection 3.
- Intraoperative target <140 mg/dL has uncertain effectiveness 3
Monitoring
- Continuous ECG monitoring: For at least 48 hours after CABG for arrhythmia detection 2
- Biomarkers: Measurement of creatine kinase-MB or troponin is reasonable in first 24 hours 3
Blood Conservation
Implement aggressive blood conservation strategies to limit hemodilutional anemia and allogeneic red blood cell transfusion 3.
- Lysine analogues: Use intraoperatively and postoperatively during on-pump CABG to reduce blood loss and transfusion requirements 3
- Multimodal approach: Employ transfusion algorithms, point-of-care testing, and focused blood conservation strategy 3
Renal Protection
In patients with preexisting renal dysfunction, delay surgery after coronary angiography until the effect of radiographic contrast on renal function is assessed 3.
- Pharmacological agents for renal protection have uncertain effectiveness 3
Special Considerations
High-Risk Patients
Intra-aortic balloon pump insertion is reasonable in high-risk patients (reoperation, LVEF <30%, or left main CAD) to reduce mortality 3.
Postoperative Cognitive Function
Sevoflurane-based anesthesia results in better postoperative cognitive function scores (MoCA and MMSE) on postoperative day 1 compared to fentanyl-propofol 6.
Enhanced Recovery Metrics
- Eating time and out-of-bed time: Earlier with sevoflurane-based anesthesia 6
- Length of stay: Shorter with optimized anesthetic technique and early extubation protocols 6, 7
- Average ICU stay: 3.8 days, with key predictors of increased length of stay including acute kidney injury, atrial fibrillation, bleeding, and prolonged chest tube duration 10