Echogenic devices, material and method

(57) The composition that radiation an unpenetrated material for emphasizing the picture of the catheter inserted in the summary purpose patient's inside of the body is hard to exfoliate from the catheter is offered. Composition In the echo generation equipment which has the acoustic impedance which a patient's organization has, and different acoustic impedance, and has the component 501 which can be inserted in a patient's inside of the body, The above-mentioned component 501 which can be inserted consists of the border plane 506 with the unevenness arranged on the tube portion 502 made from matrix material 503, and the above-mentioned tube portion, and the above-mentioned boundary layer 506 is characterized by having different acoustic impedance from it of the above-mentioned matrix material 503.