Under observation there were 189 patients with trophic ulcers of the lower extremities of venous genesis (CEAP VI class). In 78 patients conservative treatment was used with the low intensity laser radiation. Complex treatment consisted of preliminary preparing the ulcers and the following correction of the venous blood flow was used in 111 patients. 82 patients were treated by traditional methods disregarding the data of ultrasonic diagnosis. Laser therapy of ulcers by our original techniques and correction of the venous blood flow using new technologies and considering the data of duplex scanning was used in 29 patients, the best nearest and long-term results of the treatment being obtained in patients of this clinical group.