Minimally invasive coronary bypass surgery: postoperative pain management using intermittent bupivacaine infiltration.

Abstract

Minimally invasive direct coronary artery bypass grafting (MIDCAB) is becoming a popular adjunct to standard cardiac bypass surgery in selected patients with accessible single or double vessel disease. However, the limited anterior thoracotomy used to access the heart involves trauma to the muscle tissue during removal of the fourth costal cartilage and a small piece of connected rib, perhaps leading to more severe postoperative pain compared with patients undergoing routine sternotomy. Intrathecal opioids can be used but have limited therapeutic duration and there is concern regarding anticoagulation. We present a case where soft tissue catheters were placed into the depths of the surgical wounds and pain was diminished greatly by intermittent regular infiltration with bupivacaine.