Application device having a ureteral catheter and an introduction component for introducing the ureteral catheter, introduction component and application unit
An application device has a ureteral catheter with a ureteral catheter main body, a receiving body connected to the ureteral catheter main body by means of at least one connection element of the ureteral catheter, and an introduction component for holding the ureteral catheter and for guiding the ureteral catheter through a ureter of a patient along a pliable guide element. The ureteral catheter can be displaced by means of the introduction component in opposite directions of movement along the pliable guide element and the introduction component is designed to guide the ureteral catheter main body and the receiving body during displacement in the respective directions of movement.
1. An application device comprising:
a ureteral stent, which comprises a ureteral stent main body and a receiving body connected to the ureteral stent main body by at least one elongated connection element of the ureteral stent,
a pliable guide element on which the ureteral stent is positioned, and
an introduction component configured for holding the ureteral stent and guiding the ureteral stent through a ureter of a patient along the pliable guide element,
wherein the ureteral stent is displaceable along the pliable guide element in directions of movement opposite to each other by displacing the introduction component, and the introduction component is formed to guide the ureteral stent main body and the receiving body in displacing in the respective directions of movement,
wherein the introduction component comprises a recess for introducing and holding the receiving body,
wherein the introduction component comprises at least two pipe sections, into which the pliable guide element can be introduced, as well as at least one connection area connecting the at least two pipe sections to each other, wherein the at least two pipe sections and the at least one connection area delimit the recess, and
wherein a first pipe section of the at least two pipe sections is formed as a proximal end of the introduction component, into which a distal main body end of the ureteral stent main body facing the receiving body is introduced at least in certain areas at least with the ureteral stent held on the introduction component.
2. The application device according to claim 1 , wherein the receiving body has ferromagnetic characteristics.
3. The application device according to claim 1 , wherein the ureteral stent main body is rotatable together with the receiving body in relation to the pliable guide element based on the introduction component.
4. The application device according to claim 1 , wherein the at least one elongated connection element is non-rigidly or pliably formed.
5. The application device according to claim 1 , wherein the at least one elongated connection element is strained by means of the introduction component with the ureteral stent held on the introduction component.
6. The application device according to claim 4 , wherein the at least one elongated connection element is formed as a thread element or wire element.
7. The application device according to claim 1 , wherein the distal main body end introduced at least in certain areas can be held in an introduction position on the first pipe section by means of the guide element with the ureteral stent held on the introduction component, wherein the distal main body end is formed to autonomously deform from the introduction position into a basic position of the distal main body end with the guide element detached from the ureteral stent main body and to thereby move out of the first pipe section.
8. The application device according to claim 1 , wherein the distal main body end is formed, upon movement thereof out of the first pipe section and by deformation from the introduction position into the basic position, to extract the receiving body from the recess via the at least one elongated connection element.
9. The application device according to claim 1 , wherein the first, proximal pipe section of the introduction component comprises a constriction in a proximal end area, wherein an internal diameter of the constriction is smaller than an external diameter of the distal end of the ureteral stent main body or that the first, proximal pipe section of the introduction component is formed tapering in a proximal end area such that the internal diameter of the constriction is smaller than the external diameter of the distal end of the ureteral stent main body.
10. The application device according to claim 1 , wherein the first, proximal pipe section of the introduction component comprises a first pipe passage opening, the diameter of which decreases towards the receiving body such that it is approximately equal to or equal to a diameter of a passage opening of the receiving body.
11. The application device according to claim 1 , wherein a tube is arranged in the first, proximal pipe section of the introduction component, wherein the tube comprises a tube passage opening, the diameter of which decreases towards the receiving body such that it is approximately equal to or equal to a diameter of a passage opening of the receiving body, or the tube comprises a tube passage opening, the diameter of which is approximately equal to or equal to a diameter of a passage opening of the receiving body.
12. The application device according to claim 1 , wherein the recess comprises at least one inclination and/or at least one step in the end area facing the first pipe section such that a diameter of the recess increases in the area of the inclination or step.
13. The application device according to claim 1 , wherein at least one notch or peripheral recess for receiving and guiding the elongated connection element is formed in a proximal end area of the first, proximal pipe section of the introduction component.
14. The application device according to claim 1 , wherein a proximal end area of the first, proximal pipe section of the introduction component is formed funnel-shaped for receiving the distal main body end.
15. The application device according to claim 11 , wherein a proximal end area of the tube is formed funnel-shaped for receiving the distal main body end and/or a distal end area of the tube comprises at least one inclination and/or at least one step such that a diameter of the recess increases in the area of the inclination or step.
16. The application device according to claim 1 , wherein the at least one connection area is deformable between a release position, in which the at least two pipe sections are tilted in relation to each other by means of the at least one connection area and thereby the recess is expanded at least in certain areas for releasing the receiving body, and a holding position, in which the recess is constricted compared to the release position for holding the receiving body.
17. The application device according to claim 16 , wherein the at least one connection area can be held in the holding position based on the guide element with the ureteral stent held by means of the introduction component as well as with the guide element introduced into the at least two pipe sections, wherein an elastic deformation of the at least one connection area from the holding position thereof into the release position thereof can be blocked by means of the introduced guide element.
18. The application device according to claim 1 , wherein the elongated connection element is at least partially guided on an outer surface of the proximal end of the introduction component with the ureteral stent held on the introduction component.
19. The application device according to claim 1 , wherein the application device comprises a mounting sleeve, wherein the mounting sleeve is formed such that an internal diameter of the mounting sleeve is equal to or larger than an external diameter of the introduction component.