Device for taking a tissue sample
View Patent ↗Device for taking a tissue sample ( 34 ), characterized in that it comprises a spirally shaped tissue-receiving element ( 2 ), the outer free extremity of which extents in a direction which is situated in the prolongation of the spiral course of the spirally shaped tissue-receiving element ( 2 ), on one hand, and a cutting element ( 4–38 ), on the other hand, which can cooperate with the circumference of the spirally shaped tissue-receiving element ( 2 ) in order to provide in a cutting function.
1. A device for taking a tissue sample comprising a spirally shaped tissue-receiving element having a non-round cross-section and having an outer free extremity extending in and pointing in a direction along a prolongation of a spiral course of the spirally shaped tissue-receiving element to form a penetrating instrument, and a cutting element cooperating with the spirally shaped tissue-receiving element, in conjunction with a circumference of the spirally shaped tissue-receiving element for providing a cutting function.
2. The device of claim 1 , wherein the spirally shaped tissue-receiving element comprises one or a combination of two or more of following features:
the spirally shaped tissue-receiving element has a helical course;
the spirally shaped tissue-receiving element surrounds a free axial passage space;
a spiral of the spirally shaped tissue-receiving element, in a direction perpendicular to an axial direction, has a width smaller than one third of a global diameter taken by the spirally shaped tissue-receiving element;
the spirally shaped tissue-receiving element extends over several turns;
the spirally shaped tissue-receiving element has a sharp point at a free front extremity;
the sharp point at the free front extremity extends in the direction along the prolongation of the spiral course of the spirally shaped tissue-receiving element;
the spirally shaped tissue-receiving element has a body with a flat cross-section;
the spirally shaped tissue-receiving element has a body having a cross-section tapering towards an outside;
the spirally shaped tissue-receiving element has a body with lateral surfaces having an inclination of less than about 30 degrees with respect to a plane perpendicular to an axial direction of the device.
3. The device of claim 2 , wherein the body having the tapering cross-section tapering towards the outside ends in a tip.
4. The device of claim 1 , wherein the spirally shaped tissue-receiving element is located at an end of a shaped portion.
5. The device of claim 4 , wherein the shaped portion has a shape selected from the group consisting of oblong shape, bar-shape, wire-shape, and combinations thereof.
6. The device of claim 1 , further comprising at least one cylindrical element surrounding the spirally shaped tissue-receiving element.
7. The device of claim 6 , wherein the cylindrical element forms the cutting element, and wherein the spirally shaped tissue-receiving element and an edge of the cylindrical element mutually cooperate for creating the cutting function.
8. The device of claim 7 , wherein the cutting function is created by a mutual rotational and/or axial movement of the spirally shaped tissue-receiving element and the cylindrical element.
9. The device of claim 8 , wherein the front edge of the cylindrical element forms a cutting edge.
10. The device of claim 9 , wherein an inclination of the cutting edge is opposed to an inclination of the spirally shaped tissue-receiving element.
11. The device of claim 9 , wherein an inclination of one or more portions of the cutting edge is opposed to an inclination of the spirally shaped tissue-receiving element.
12. The device of claim 7 , wherein the spirally shaped tissue-receiving element is of a springy material deformable between at least two positions, a free position and a deformed position, wherein in the free position the spirally shaped tissue-receiving element takes shape of a spiral and in the deformed position the spirally shaped tissue-receiving element is flattened, elongated, respectively, to a minor or major extent.
13. The device of claim 12 , wherein the cylindrical element is a holder for slidingly receiving one or more shaped tissue-receiving elements for moving the spirally shaped tissue-receiving element in and out of the cylindrical element, and wherein the spirally shaped tissue-receiving element is in the undeformed condition when situated in the cylindrical element.
14. The device of claim 1 , further comprising at least one hollow or thread shaped spirally shaped element cooperating with the spirally shaped tissue-receiving element.
15. The device of claim 14 , wherein the spirally shaped element is the cutting element extending around the spirally shaped tissue-receiving element, wherein a cutting effect is created during a mutual turning movement of the spirally shaped element and the spirally shaped tissue-receiving element.
16. The device of claim 15 , further comprising a motorized driver for turning the spirally shaped element and the spirally shaped tissue-receiving element and for driving the cutting element in a rotating manner around the spirally shaped tissue-receiving element.
17. The device of claim 1 , wherein the device is a biopsy needle or is adaptable for a biopsy needle.
18. The device of claim 1 , wherein the device is a flexible catheter or is adaptable for a catheter.
19. The device of claim 1 , further comprising a localization element axially movable in the spirally shaped tissue-receiving element.
20. The device of claim 19 , wherein the localization element is a localization needle.
21. A device for taking a tissue sample comprising a flexible catheter and the spirally shaped tissue-receiving element of claim 18 cooperating with the flexible catheter.
22. The device of claim 21 , wherein the spirally shaped tissue-receiving element is displaceable with respect to the catheter between at least two positions, wherein in one position the tissue-receiving element is situated at least partially outside a front end of the catheter and in another position the tissue-receiving element is situated in a drawn-in position in the catheter.