Lithotripsy device for breaking up calculi with a control sleeve, and method for accelerating a projectile of a lithotripsy device

A lithotripsy device for breaking up calculi, wherein the lithotripsy device comprises:

• a support unit,
• a guide tube with a cavity, with a proximal end, and with a distal end,
• a movable projectile,
• a proximal stop element,
• a distal stop element for the movable projectile, wherein the guide tube is arranged at least partially in the support unit, and the lithotripsy device is configured to be assigned a drive device for supplying and/or discharging a pressure medium into an interior of the support unit and/or the guide tube, to move the projectile back and forth between the proximal stop element and the distal stop element, and a sonotrode, wherein the guide tube has at least one proximal through-opening and at least one distal through-opening for supplying and/or discharging the pressure medium into and/or out of the guide tube cavity, and the sonotrode can be connected directly or indirectly at its proximal end to the support unit and/or the guide tube and can be excited to vibrate by a mechanical impact of the projectile on the distal stop element, and
• a control sleeve is arranged in the cavity of the guide tube, wherein the control sleeve has a cavity along a control sleeve longitudinal center axis, a proximal end, a distal end, at least one proximal opening and at least one distal opening for the pressure medium, and in the cavity of the control sleeve the movable projectile is arranged with a driver element for driving the control sleeve, so that when the control sleeve is moved by means of the driver element of the projectile, a first valve-opening position exists for the flow of the pressure medium through the at least one proximal through-opening of the guide tube and the at least one proximal opening of the control sleeve into and/or out of the cavity of the control sleeve, to move the projectile towards the distal stop element, and a second valve-opening position exists for the flow of the pressure medium through the at least one distal through-opening of the guide tube and the at least one distal opening of the control sleeve into and/or out of the cavity of the control sleeve, to move the projectile back to the proximal stop element.