Medical resector having a rotatable high-frequency electrode and drive unit therefor
View Patent ↗A drive unit for a rotatable high-frequency electrode of a medical resector for cutting, ablating, or coagulating human or animal tissue includes an engine device for generating a rotation movement and a coupling device for transmitting the rotation movement generated by the engine device to an axis coupled with the rotatable high-frequency electrode when the drive unit is coupled with the medical resector. The drive unit is configured to provide on the coupling device a rotation frequency in a range from 10 rpm to 200 rpm.
1. A drive unit for a rotatable high-frequency electrode of a medical resector for cutting, ablating, or coagulating human or animal tissue, having:
an engine device for generating a rotation movement;
a coupling device for transmitting the rotation movement generated by the engine device to an axle coupled with a rotatable high-frequency electrode when the drive unit is coupled with a medical resector; and
a locking device for locking the coupling device of the medical resector in the drive unit, wherein the locking device includes a spring-loaded bolt that is configured to engage in a groove in an axle of the medical resector,
wherein the drive unit is configured to provide on the coupling device a rotation frequency in a range from 10 revolutions per minute to 200 rpm.
2. The drive unit according to claim 1 , wherein the engine device comprises a reduction gear.
3. The drive unit according to claim 1 , wherein the coupling device includes a hollow space with a cylindrical portion that is not symmetrical with the rotation axis of the coupling device.
4. The drive unit according to claim 1 , wherein the drive unit is configured to provide on the coupling device a rotation frequency in a range from 30 rpm to 60 rpm.
5. The drive unit according to claim 1 , wherein the drive unit is configured to be mechanically connected with the medical resector in such a way that a rotation axis of the coupling device is not parallel with a longitudinal axis of the medical resector.
6. The drive unit according to claim 1 , wherein the locking device is configured not to rotate with the coupling device.
7. The drive unit according to claim 1 , wherein the spring-loaded bolt comprises an aperture or a recess in which an axle of the medical resector is positioned when the medical resector is coupled with the drive unit.
8. The drive unit according to claim 1 , wherein the coupling device is also configured to transmit an electric high-frequency signal from the drive unit to an axle of the medical resector.
9. The drive unit according to claim 1 , in addition with:
a contacting device for transmitting an electric high-frequency signal to the coupling device, wherein the contacting device includes a sliding contact that is contiguous with a mantle surface of the coupling device.
10. The drive unit according to claim 1 , wherein the drive unit is configured to be connected directly, in fluid-insulated and detachable manner with a drain chamber.