... Only 2 similar machine in the world 3.Portable and lightless Portable and lightless!! Ultrasonic Wound Irrigation SystemNoncontact and ... trauma, surgical wounds, infected wounds / wound, such as burn wounds, purulent wound / wound, sinus, fistula; difficult to heal wounds ... bacteria,viruses,fungs and necrotic tissue in wound, and prompt wound healing by special low frequency ultrasonic power loading ...