Abstract: The invention relates to a medical device, comprising a hose-, tube- or hollow needle-shaped body, comprising a first layer (12) and an adjoining second layer (14) made of plastic material, wherein hollow spheres (22, 24) for generating echogenic properties are contained in the second layer. So as to achieve good echogenic properties, according to the invention both the inner first layer (12) and the adjoining second layer (14) comprise hollow spheres (18, 20, 22, 24) for generating echogenic properties, the hollow spheres (18, 20) of the first layer, these being the first hollow spheres, on average have smaller diameters D1 than the hollow spheres (22, 24) of the second layer referred to as the second hollow spheres, and/or that the fill content F1 of the first hollow spheres in the first layer is less than the fill content F2 of the second hollow spheres in the second layer.