Catheter device having a catheter and an actuation device
The invention relates to a catheter device, having a catheter ( 1 ), an actuation device ( 8 ) at a first end of the catheter and also a mechanical transmission element ( 9, 10 ) for transmitting a movement along the catheter to the actuation device, the actuation device having a coupling element ( 14 ) which is connected to the transmission element ( 9, 10 ) and can be actuated by the latter relative to the longitudinal direction of the catheter in a first degree of freedom, and also a conversion element ( 15 ) which can be actuated by the coupling element and which converts the actuation movement at least partially into a movement in a second degree of freedom. As a result, a combined movement at the distal end of the catheter can be produced particularly simply for compression and release of a functional element.
1. A catheter device, having a catheter, an actuation device at a first end of the catheter, a drive element and also a mechanical transmission element for transmitting a movement along the catheter to the actuation device, the actuation device having a coupling element which is connected to the transmission element configured to be actuated by the transmission element relative to a longitudinal direction of the catheter, and also a conversion element configured to be actuated by the coupling element, said conversion element has screw-like tracks configured to convert an axial movement at least partially into a rotary movement relative to said longitudinal direction.
2. The catheter device according to claim 1 , characterised in that the conversion element has a link pin connected rigidly to the catheter.
3. The catheter device of claim 2 , wherein a link pin is located in each of said link tracks.
4. The catheter device according to claim 1 , characterised in that the transmission element is designed to transmit a movement in the longitudinal direction of the catheter.
5. The catheter device according to claim 1 , characterised in that the conversion element produces said rotary movement about the longitudinal direction of the catheter in the region of the actuation device.
6. The catheter device according to claim 1 , characterised in that a connection between the coupling element and the conversion element provides a moveable mounting which enables said rotary movement relative to said longitudinal direction of the coupling element and of the conversion element.
7. The catheter device according to claim 6 , characterised in that the coupling element is configured as a bearing ring to which the conversion element is connected rotatably.
8. The catheter device according to claim 1 , characterised in that the transmission element is configured as, in particular, at least one cable which is guided parallel or in a helix-like manner relative to the catheter, in particular on the outside thereof.
9. The catheter device according to claim 8 , characterised in that the at least one cable is guided on the catheter, displaceably in the longitudinal direction.
10. The catheter device according to claim 9 , characterised in that the at least one cable is recessed at least partially in the wall of the catheter.
11. The catheter device according to claim 8 , characterised in that two cables are fixed individually on a common fixing element taking into account the required length adaptations due to the given curvature of the catheter.
12. The catheter device of claim 8 , further comprising a fixing element having two conical rings for fixing said at least one cable.
13. The catheter device of claim 8 , wherein said at least one cable extends longitudinally along said catheter through a lock.
14. The catheter device of claim 13 , wherein said lock is a stop for said coupling element.
15. The catheter device according to claim 1 , characterised in that the transmission element is configured as a hose surrounding the catheter.
16. The catheter device according to claim 1 , characterised by a functional element, in particular a pump, at the end of the catheter and also a protective cap which is connected to the conversion element and which receives the functional element in a first position of the conversion element and releases said functional element in a second position.
17. The catheter device according to claim 16 , characterised in that the protective cap has smaller inner dimensions than outer dimensions of the functional element in the released position and in that the functional element can be compressed at least partially.
18. The catheter device of claim 1 , wherein said link tracks are offset parallel to one another.