or undesired detachment according to an additional characteristic slots 206 lie on a plane that is basically parallel to the opening of the cable holding groove 105 this makes it possible to place the needle guide 108 in a position that is basically aligned with the middle plane perpendicular to the flattened area 102 of the body 2 housing the transducers t preferably on said plane the needle guiding groove 308 sic has a preset angle relative to the axis of the connecting seat 106 for the transducer carrying head 1 so that it converges toward said axis in the direction of the head carrying the transducers t thus forming an angle of less than 45 u00b0 with said flattened area this arrangement makes it possible to use the probe of the invention as a guiding and supporting structure for the needle thus making it considerably easier to obtain tissue samples fig2 to 23 illustrate a second embodiment of the probe according to the invention here the handle 5 is replaced by means of attachment to one finger of the hand the probe 39 s connecting seat 106 is designed in a manner similar to that previously described however instead of being located in a terminal portion of the handle 5 said connecting seat is designed in the shape of an open ring or bushing 6 39 said ring 6 39 is attached to an open thimble or ring 10 having a diameter basically corresponding to the diameter of the hand 39 s fingers.