Enantiomeric determination of amines by high-performance liquid chromatography using chiral fluorescent derivatization reagents

BACKGROUND: Despite increased awareness of risk factors, wound complications continue to be a problem following coronary artery bypass graft (CABG) surgery. A minimally invasive alternative was therefore developed to reduce the risk of complications while providing the same benefits as the standard open vein harvest procedure. METHODS: Video-assisted endoscopic technique for vein harvest was introduced in our medical center in October 1996. The procedure was evaluated and compared with the standard open vein harvest procedure. With the endoscopic technique, small incisions were made, each about 2-3 cm at the selected access sites (groin and above and below the knee). An endopath subcutaneous dissector was subsequently inserted along the anterior surface of the saphenous vein with the assistance of an endoscope and video monitor. The venous side branches were detected and positioned using a vessel dissector. A ligaclip was applied and the branches were divided using endopath-scissors. In some cases, the venous branches were divided directly using the endopath-scissors. Therefore, the distal and proximal ends of the saphenous vein were isolated, ligated and divided. The harvested veins were used for CABG. Each patient was evaluated for length of surgery, hospital stay and morbidity. RESULTS: From October 1996 through May 1997, we performed 50 procedures using video-assisted endoscopic vein harvest. The results were compared with those from 106 patients who underwent standard open vein harvest during the same period. The rate of complications was 2% in the endoscopic group compared with 13.2% in the open group (p < 0.05). The average hospital stay was 7.2 days in the endoscopic group and 11.5 days in the open group (p < 0.05). Twelve weeks after the operation, all of the incisions healed with good cosmetic results in the endoscopic group. However, long visible scars were found in the patients in the open group. CONCLUSIONS: Endoscopic saphenous vein harvest provides a minimally invasive alternative to open vein harvest. It provides good cosmetic results without a hypertrophic scar and enables the patient to regain early ambulation.