Abstract: A medical instrument for diagnostic, therapeutic, or surgical measures in a cavity in the body of a patient may include a proximal region, which is provided and designed for arrangement outside the body, a distal region, which is provided and designed for arrangement inside a cavity in the body, a supply structure for delivering a fluid to the cavity, wherein the supply structure reaches from a first coupling in the proximal region of the medical instrument to an outlet in the distal region, and a discharge structure for discharging a fluid from the cavity, wherein the discharge structure reaches from an inlet in the distal region of the medical instrument to a second coupling in the proximal region of the medical instrument. The flow resistance of the supply structure is greater than the flow resistance of the discharge structure.

Abstract: The disclosure relates to a medical instrument for minimally invasive tissue ablation by means of an HF electrode, with a hollow shaft, wherein the HF electrode is electrically insulated from the hollow shaft, is arranged at a distal end of the latter and, in order to ablate tissue, protrudes axially beyond the hollow shaft at least in part. The angle orientation of the HF electrode relative to the hollow shaft is adjustable in a controlled manner to a working position in which the HF electrode, protrudes radially beyond an outer circumference of the hollow shaft in order to ablate tissue. In the working position, by means of suitable adjustment of the shaft and of the HF electrode, a position can always be found in which the distal end of the HF electrode sufficiently reaches or touches tissue portions that are to be ablated in the region of the bladder neck.

Abstract: An electrode arrangement according to the invention for a bipolar resectoscope (50) comprises an elongate electrode carrier (2), an active electrode disposed at a distal end of the electrode carrier (2) and a neutral electrode, wherein a distal end section of the electrode carrier (2) is embodied as an electrode body (4, 40) through which a supply line (20) of the active electrode is guided and wherein the neutral electrode is formed by the electrode body (4, 40) or a portion of the electrode body (4, 40). The invention also relates to a resectoscope (50).

Abstract: A manipulation device (20) for a microinvasive medical instrument (10) comprises a recess (47) for receiving a proximal region (72) of an electrically conductive transmission device (70) for transmitting electrical power and at least either a force or a torque to a distal end of a microinvasive medical instrument (10), and a contacting device (50) for producing an electrical contact to a transmission device (70) arranged in the recess (47). The contacting device (50) has a plurality of contact faces (57) for simultaneously bearing on a surface (75) of a transmission device (70) arranged in the intended manner in the recess (47).

Abstract: The present application discloses a medical instrument for tissue ablation by a minimally invasive surgical procedure, including a hollow outer shaft, an inner shaft which can be guided longitudinally displaceably in the hollow outer shaft, and a control portion at a proximal end of the medical instrument, in order to position the hollow outer shaft. An attachment for mechanical ablation of tissue is arranged at a distal end of the inner shaft, wherein the attachment does not protrude beyond an inner profile formed by the inner faces of the outer shaft, and wherein at any rate the distal end of the attachment protrudes beyond the distal end of the hollow outer shaft in order to ablate tissue. The medical instrument may be combined with further medical appliances, in particular with an HF coagulation attachment or a laser coagulation attachment for tissue coagulation.

Abstract: An electrode arrangement according to the invention for a bipolar resectoscope (50) comprises an elongate electrode carrier (2), an active electrode disposed at a distal end of the electrode carrier (2) and a neutral electrode, wherein a distal end section of the electrode carrier (2) is embodied as an electrode body (4, 40) through which a supply line (20) of the active electrode is guided and wherein the neutral electrode is formed by the electrode body (4, 40) or a portion of the electrode body (4, 40). The invention also relates to a resectoscope (50).

Abstract: A manipulation device (20) for a microinvasive medical instrument (10) comprises a recess (47) for receiving a proximal region (72) of an electrically conductive transmission device (70) for transmitting electrical power and at least either a force or a torque to a distal end of a microinvasive medical instrument (10), and a contacting device (50) for producing an electrical contact to a transmission device (70) arranged in the recess (47). The contacting device (50) has a plurality of contact faces (57) for simultaneously bearing on a surface (75) of a transmission device (70) arranged in the intended manner in the recess (47).

Abstract: The disclosure relates to a medical instrument for minimally invasive tissue ablation by means of an HF electrode, with a hollow shaft, wherein the HF electrode is electrically insulated from the hollow shaft, is arranged at a distal end of the latter and, in order to ablate tissue, protrudes axially beyond the hollow shaft at least in part. The angle orientation of the HF electrode relative to the hollow shaft is adjustable in a controlled manner to a working position in which the HF electrode, protrudes radially beyond an outer circumference of the hollow shaft in order to ablate tissue. In the working position, by means of suitable adjustment of the shaft and of the HF electrode, a position can always be found in which the distal end of the HF electrode sufficiently reaches or touches tissue portions that are to be ablated in the region of the bladder neck.

Abstract: The present application discloses a medical instrument for tissue ablation by a minimally invasive surgical procedure, including a hollow outer shaft, an inner shaft which can be guided longitudinally displaceably in the hollow outer shaft, and a control portion at a proximal end of the medical instrument, in order to position the hollow outer shaft. An attachment for mechanical ablation of tissue is arranged at a distal end of the inner shaft, wherein the attachment does not protrude beyond an inner profile formed by the inner faces of the outer shaft, and wherein at any rate the distal end of the attachment protrudes beyond the distal end of the hollow outer shaft in order to ablate tissue. The medical instrument may be combined with further medical appliances, in particular with an HF coagulation attachment or a laser coagulation attachment for tissue coagulation.

Abstract: A medical instrument for diagnostic, therapeutic, or surgical measures in a cavity in the body of a patient may include a proximal region, which is provided and designed for arrangement outside the body, a distal region, which is provided and designed for arrangement inside a cavity in the body, a supply structure for delivering a fluid to the cavity, wherein the supply structure reaches from a first coupling in the proximal region of the medical instrument to an outlet in the distal region, and a discharge structure for discharging a fluid from the cavity, wherein the discharge structure reaches from an inlet in the distal region of the medical instrument to a second coupling in the proximal region of the medical instrument. The flow resistance of the supply structure is greater than the flow resistance of the discharge structure.

Abstract: A medical instrument (10) comprises an effecting device (40), which is movable in a first direction (48) from a first effecting position into a second effecting position, a pushbutton (60), which is movable manually in a second direction (68) from a first button position into a second button position, and a lever (70), which is pivotable about a pivot axis (78). The lever (70) mechanically couples the pushbutton (60) and the effecting device (40) in such a way that a movement of the pushbutton (60) in the second direction (68) is accompanied by a movement of the effecting device (40) in the first direction (48), which is opposite to the second direction (68). The lever (70) does not have an area that is rotationally symmetrical to the pivot axis (78) in the region of the pivot axis (78).

Abstract: Bipolar medical instrument for cutting tissue under the action of high-frequency current, wherein the instrument extends along a longitudinal direction from a proximal end to a distal end, wherein an active electrode and a neutral electrode, adjacent to the active electrode, are arranged at the distal end, and wherein the neutral electrode has a curved profile with a first curvature and a second curvature, wherein the respective directions of the curvatures are different. An electrosurgical system is also disclosed, with a high-frequency generator, and with one such bipolar medical instrument, which can be attached to the high-frequency generator.

Abstract: A medical instrument (10) comprises an effecting device (40), which is movable in a first direction (48) from a first effecting position into a second effecting position, a pushbutton (60), which is movable manually in a second direction (68) from a first button position into a second button position, and a lever (70), which is pivotable about a pivot axis (78). The lever (70) mechanically couples the pushbutton (60) and the effecting device (40) in such a way that a movement of the pushbutton (60) in the second direction (68) is accompanied by a movement of the effecting device (40) in the first direction(48), which is opposite to the second direction (68). The lever (70) does not have an area that is rotationally symmetrical to the pivot axis (78) in the region of the pivot axis (78).