A medical device configured for insertion into a body may include an elongate member extending from a proximal end to a distal end, and the distal end may be configured to be positioned inside the body. The medical device also may include an optical fiber disposed in a lumen of the elongate member and also may include an illumination source configured to emit light through the optical fiber. The illumination source may be disposed on a first surface of a heat dissipating member. An oscillating member also may be included in the medical device. The oscillating member may face a second surface of the heat dissipating member and may be configured to direct air at the second surface of the heat dissipating member.