Spectranetics Corp. of Colorado Springs, Colo., a maker of excimer lasers for cardiovascular procedures, announced yesterday it has appointed Donald Fletcher as vice president of quality assurance and regulatory compliance. Fletcher, who replaces the retiring Adrian Elfe, has more than 30 years experience managing quality assurance and operations functions in the medical device and pharmaceutical industries. He was previously director of quality assurance at Medtronic Vascular Products. Prior to that, he was director of manufacturing operations and quality systems at QTL Biosystems and vice president of operations for Sigma Diagnostics.