Age

18–80

Sex

ALL

Healthy volunteers

Not accepted

Contraindications to epidural placement
Chronic pre-operative opioid use, defined as daily opioid use for 30-days prior to surgery
Allergy or intolerance to study medications
Age greater than 80 years
Impaired renal function - defined as creatinine clearance or estimated GFR of \<60ml/min
Planned ICU admissions with post-operative intubation
Urgent or emergent presentations
Adults unable to consent
Pregnant patients

Epidural Analgesia Versus Opioid-sparing Analgesia for Open Ventral Hernia Repair With Transversus Abdominis Release