Pressure support and elevation following the removal of a radial artery for coronary artery bypass grafting

Abstract

The saphenous vein was once the standard coronary artery bypass graft. Alternate grafts, primarily the radial artery and the internal mammary artery are now being utilised for revascularisation of the heart. However, the radial artery graft site can be at risk of oedema and the development of haematoma during the post-operative period. Also tension on the suture line may compromise circulation and create functional problems for the patient. The aim of this study was to assess the effect of pressure support (elastic support bandage) and elevation in reducing swelling and arm discomfort in the harvest arm. The patients in the study undergoing coronary artery bypass grafts were randomly assigned to one of three groups: elastic support bandage, collar and cuff sling and elevation on two pillows. There were 30 patients in each group. The circumference at three locations on the forearm was measured pre-operatively and on post-operative days 3 and 5. Pain was measured on a visual pain scale, which went from 1-10, with 10 being the most painful. The patients were also asked whether their arm movement felt restricted. The study found that there was no statistically significant difference (at the 0.05 level) between the three groups in the amount of swelling witnessed at the different forearm locations. There was, however, a significant decrease in swelling for all groups between days 3-5, but no difference in pain scores between the groups. Moreover, the collar and cuff sling group reported movement restriction, which was not apparent in the other two groups. In view of the findings, the researchers advocate the elastic support bandage. Patient compliance has practical implications when applying treatment and this is enhanced by the non cumbersome elastic support bandage. This can be compared to the collar and cuff sling and pillow elevation groups where the patient's daily activities affects compliance with these two treatments. It is recommended that future research be conducted comparing the effects of the elastic support bandage with a control group.