Effect of Pulse Width on Scar Treatment Using a 595-nm Pulsed Dye Laser

Inclusion Criteria: * Healthy, adult subjects aged above 18. * Subjects must be in good health as determined by the investigator. * Presence of keloidal and hypertrophic sternotomy scars for at least 6 months * Subjects must have no prior treatment of the scar within 1 month before the first treatment session. * Subject or authorized representative must sign Informed Consent Form prior to study enrollment. Exclusion Criteria: * Female subjects known to be pregnant. * Subjects with scleroderma, connective tissue disorders, hematologic disorders, hepatitis, infection, or uncontrolled diabetes mellitus. * Subjects with photosensitive dermatoses such as Systemic Lupus Erythematosus (SLE) * Subjects with a documented positive HIV test. * Subjects who are on any types of anticoagulants. * Subjects who are habitual smokers of cigars, pipe tobacco, or cigarettes. * Subjects with history of radiation treatment at treatment sites. * Subjects who use of any types of treatment of scars at the treatment site within one month before the first treatment visit. * Subjects who are on medication that may interfere with wound healing or hemostasis. * Subjects that have not signed the Informed Consent Form.