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Peripheral nerve injuries in cardiac anaesthesia
R N Merchant1, W F Brown, B V Watson
1University Hospital, London, Ontario.
Summary
Coronary artery bypass grafting (CABG) surgery frequently causes nerve damage, particularly affecting the ulnar nerve at the elbow. While most injuries recover, larger patients face higher risks, and preventative measures remain unidentified.
Area of Science:
- Neurology
- Cardiovascular Surgery
- Clinical Outcomes
Background:
- Nerve damage is a recognized complication following Coronary Artery Bypass Grafting (CABG) surgery.
- Subclinical nerve dysfunction may be more prevalent than clinically apparent nerve injuries.
Purpose of the Study:
- To investigate the incidence and characteristics of nerve damage in patients undergoing CABG.
- To identify risk factors and recovery patterns of nerve injuries post-CABG.
Main Methods:
- Prospective evaluation of nerve function in patients undergoing CABG.
- Assessment of clinical and subclinical nerve damage, focusing on the ulnar nerve.
- Analysis of injury location, timing, and patient-related risk factors.
Main Results:
- Clinical nerve damage occurred in 15% of CABG patients; subclinical ulnar nerve dysfunction was observed in 40%.
- Injuries were predominantly located at the elbow and often developed outside the immediate perioperative period.
- Larger patient size was associated with increased risk, but specific protective interventions were not identified.
Conclusions:
- Nerve injuries, especially subclinical ulnar nerve changes, are common after CABG.
- Most nerve injuries resolve without long-term deficits, though risk factors like patient size warrant attention.
- Further research is needed to develop targeted interventions to mitigate nerve injury risk during CABG.