ORLANDO, Fla.--(BUSINESS WIRE)--American Medical Systems, Inc. (AMS) announced today the presentation of a range of studies on its GreenLight™ laser system at the 2008 annual meeting of the American Urological Society (AUA) in Orlando. Among the twenty abstracts presented, two were randomized studies, conducted by international teams of researchers, concluding that Photoselective Vaporization of the Prostate (PVP) performed with the GreenLight laser is safer than, and as effective as, Transurethral Resection of the Prostate (TURP), the most common type of surgery for Benign Prostatic Hyperplasia (BPH).