EP4507594A1 - Lithotripsievorrichtung zum zertrümmern von körpersteinen mit einer steuerhülse und verfahren zum beschleunigen eines projektils einer lithotripsievorrichtung - Google Patents
Lithotripsievorrichtung zum zertrümmern von körpersteinen mit einer steuerhülse und verfahren zum beschleunigen eines projektils einer lithotripsievorrichtungInfo
- Publication number
- EP4507594A1 EP4507594A1 EP23715172.5A EP23715172A EP4507594A1 EP 4507594 A1 EP4507594 A1 EP 4507594A1 EP 23715172 A EP23715172 A EP 23715172A EP 4507594 A1 EP4507594 A1 EP 4507594A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distal
- proximal
- control sleeve
- projectile
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B2017/22005—Effects, e.g. on tissue
- A61B2017/22011—Combined types of vibration, e.g. ultrasonic and electrohydraulic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B2017/22014—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement the ultrasound transducer being outside patient's body; with an ultrasound transmission member; with a wave guide; with a vibrated guide wire
Definitions
- the invention relates to a lithotripsy device for shattering body stones, the lithotripsy device comprising a carrier unit, a guide tube with a cavity, with a proximal end and with a distal end, a movable projectile, and a proximal-side stop element and a distal-side stop element for the movable projectile, wherein the guide tube is at least partially arranged in the carrier unit, and the lithotripsy device has a drive device for supplying and/or discharging a pressure medium into an interior of the carrier unit and/or the guide tube for moving the projectile back and forth between the proximal-side stop element and the distal-side stop element and a sonotrode can be assigned, the guide tube having at least one proximal-side through-opening and at least one distal-side through-opening for supplying and/or discharging the pressure medium into and/or out of its cavity, and the sonotrode its proximal end can be connected directly or
- Lithotripsy is a well-known procedure for shattering body stones, such as: B. through condensation and/or crystallization of salts and proteins as a so-called concretion in body organs, such as the bladder or kidney. If the body stones are too large to pass naturally and cause discomfort, they must be crushed with a lithotripter so that the crushed stones can be removed by natural excretion and/or using a suction-irrigation pump. The body stones to be broken are often constructed inhomogeneously with different components and/or strengths.
- Pneumatic lithotripters are based on the impact hammer principle, in which a projectile accelerates within an acceleration tube and the kinetic energy of the projectile is transferred via an elastic shock to the proximal end of a probe and/or sonotrode and further to its distal end for fragmentation of the body stone is transferred.
- the successive opening of the projectile is usually controlled via timed compressed air blasts.
- the timing of the shock waves transmitted to the probe and/or sonotrode is directly dependent on the temporal sequence of the compressed air shocks applied one after the other. Consequently, the stroke rate is due to the single-lumen acceleration tube and reversing compressed air drive of the projectile is limited in known lithotripters.
- a compressed air reservoir must be connected to the interior of the acceleration tube on the distal side via a connection and a switching valve in order to move the projectile back to the proximal stop after the projectile has stopped on the distal side.
- the air in the connecting hose to the lithotripter must be moved back with each pulse and released into the open via a resistance of a switching valve on the proximal side, for example in the control unit.
- a complex operating device with a time-controlled changeover valve is required.
- the projectile usually does not spring back automatically at the proximal stop and thus at the reversal point, but must be accelerated again from a standstill in the distal direction with compressed air. These boundary conditions usually limit the maximum beat cadence to well below 15 Hz.
- a deflection lever is usually required to change the direction of movement of the projectile and thus to deflect the impact. Due to a loss of impact impulse caused by a deflection lever, it is only possible to a limited extent to generate a large distal velocity with a simultaneously high amplitude at the sonotrode and/or probe end.
- the object of the invention is to improve the state of the art.
- the task is solved by a lithotripsy device for shattering body stones, the lithotripsy device having a carrier unit, a guide tube with a cavity, with a proximal end and with a distal end, a movable projectile, and a proximal-side stop element and a distal-side stop element for the movable projectile, wherein the guide tube is at least partially arranged in the carrier unit, and the lithotripsy device has a drive device for supplying and/or discharging a pressure medium into an interior of the carrier unit and/or the guide tube for moving the projectile back and forth between the proximal-side stop element and the distal-side stop element and a sonotrode can be assigned, the guide tube having at least one proximal-side through-opening and at least one distal-side through-opening for supplying and/or discharging the pressure medium into and/or out of its cavity,
- a lithotripsy device is provided with a self-exciting projectile with continuous supply and/or removal of the pressure medium, in which the projectile is kept in continuous movement due to the driving of the control sleeve, the control sleeve forming a changeover valve with the guide tube, so that there is a constant change between the first valve opening position and the second valve opening position for the mutual pressure medium drive of the projectile and thus for moving the projectile back and forth between the proximal-side stop element and the distal-side stop element. It is particularly advantageous here that the supply and/or removal of the printing medium takes place continuously, so that there are no changing pressure shock loads on the components the lithotripsy device is present, through which the print medium is guided.
- the continuous supply and/or removal of the pressure medium results in a long service life and a short service life Maintenance requirements of the lithotripsy device guaranteed.
- the safety risk of leaks is significantly reduced.
- the more uniform movement of the pressure medium and the reduction in pressure surges reduce the tendency for the hose line to oscillate and vibrate, which allows the user to operate the instrument more comfortably and thus achieves a better surgical result.
- the lithotripsy device has a smaller installation space and therefore a possibly reduced instrument weight, since the distal-side pressure reservoir with a changeover valve and connection to the acceleration section is omitted compared to known lithotripters.
- the projectile uses the driver element to take the control sleeve along a certain switching path along the acceleration path until the control sleeve hits the proximal stop element with its proximal end or the distal stop element with its distal end, the projectile then continues on its own against the proximal Stop element or the distal stop element runs and is repulsed on the corresponding stop element and takes the control sleeve back in the opposite direction, an automatic switching of the direction of movement of the projectile and the exposed through openings for the inflow and / or outflow of the pressure medium takes place within the lithotripsy device itself.
- a self-stimulating process takes place in which the projectile is continuously moved back and forth by the constantly applied pressure. Due to the uniform pressure medium flow through the at least one proximal-side through-opening and the at least one distal-side through-opening of the guide tube and through the at least one proximal-side opening and the at least one distal-side opening of the control sleeve in always the same directions and the repulsation of the projectile on the With the proximal stop element and the distal stop element, a higher beat cadence is achieved, in particular with a frequency of >15 Hz, preferably >30 Hz, than with known lithotripters.
- An essential idea of the invention is based on realizing a valve switch for moving the projectile back and forth just inside the lithotripsy device itself by means of a guide tube and a control sleeve that is partially carried along with the projectile by means of the driver element and only the pressure medium flows continuously to feed and/or remove the guide tube and the control sleeve.
- the valve switching By integrating the valve switching and thus redirecting the direction of movement of the projectile, a complex external supply and removal as well as control of the pressure medium, a time control of external switching valves and a distal pressure reservoir are not required. Overall, a large distal speed with a simultaneous high amplitude at the distal end of the sonotrode and thus an optimal and ef fi cient stone removal is made possible.
- the frequency of the mechanical impacts of the projectile on the sonotrode is not predetermined by external clocked pressure surges, but can be specifically adjusted via the pressure medium flow, the design of the guide tube, the control sleeve and the driver element of the projectile.
- a “lithotripsy device” (also called a “lithotripter”) is in particular a device for shattering body stones by impacts, shock waves and/or deformation waves.
- a lithotripsy device is understood to mean, in particular, various components, structural and/or functional components of a lithotripter.
- the lithotripsy device can form a lithotripter completely or partially.
- a lithotripsy device can in particular be an intracorporeal or extracorporeal lithotripsy device. In the case of an intracorporeal lithotripsy device, this can also have a rinsing/suction pump.
- the lithotripsy device can be designed as a hand-held device and/or have an endoscope or can be inserted into an endoscope.
- the lithotripsy device is in particular autoclavable and has, for example, instrument steel and/or plastic.
- the lithotripsy device can have further components, such as a control and/or supply device, or these are assigned to the lithotripsy device.
- a lithotripsy device is in particular a pneumatic lithotripsy device.
- Body stones are understood to mean in particular all stones in a human or animal body, such as: B. from salts and proteins through crystallization and/or condensation.
- Body stones can be, for example, gallstones, urinary stones, kidney stones and/or salivary stones.
- a “carrier unit” is in particular a hand and/or holding part of the lithotripsy device.
- the carrier unit can in particular be a handle for manual and/or automated operation and/or connection of the lithotripsy device.
- the carrier unit can also be attached to a distal end of one Robot arm can be arranged, connected and/or guided automatically.
- the carrier unit in particular has a housing.
- a “guide tube” is in particular an elongated hollow body, the length of which has a larger dimension than its diameter.
- the guide tube has in particular a cavity in its interior in which the control sleeve and a projectile which can be freely moved in the longitudinal direction are arranged Furthermore, the guide tube has in particular a proximal end and a distal end, which spatially determine the maximum acceleration distance for the projectile.
- the guide tube has at least one proximal-side through-opening and at least one distal-side through-opening for a passage of Pressure medium into and/or out of its cavity.
- the guide tube represents in particular a stationary, outer valve sleeve with corresponding through openings corresponding to the openings of the control sleeve.
- the guide tube can also be a hollow cylinder instead of a tube, whereby the two closed end faces directly form the proximal and distal stop elements.
- the guide tube can also be connected to the proximal stop element and/or the distal stop element.
- one end of the guide tube can, for example, be arranged to engage directly in a groove in the stop element.
- a "stop element” is in particular a desired end point of the movement of the projectile along the Acceleration distance at which the accelerated projectile hits the stop element, is braked, springs back and/or is moved in the opposite direction.
- the stop element thus absorbs the impact and/or shock of the projectile.
- a stop element can be, for example, a wall transverse to the longitudinal center axis of the guide tube and/or the control sleeve, a spring element, a part of an ultrasonic oscillator, such as a horn, and/or an air cushion of a compressed air spring.
- a proximal-side stop element is arranged in particular at and/or in the proximal end of the guide tube and/or within the cavity in a region of the proximal section of the guide tube.
- a distal-side stop element is arranged in particular at and/or in the distal end of the guide tube and/or within the cavity in a region of the distal section of the guide tube.
- the proximal-side stop element can be, for example, a spring element.
- the distal-side stop element is in particular connected directly or indirectly to the proximal end of the sonotrode.
- the distal-side stop element can be, for example, a spring element, a wall of a holder of the sonotrode and/or the horn aligned with the cavity of the guide tube.
- distal side and distal are understood to mean an arrangement and/or a corresponding end or section that is close to the body and therefore distant from the user.
- proximal side or “proximal” an arrangement or a corresponding end or section that is close to the user and therefore away from the body.
- An “acceleration distance” is in particular a section of a longitudinal dimension of the cavity of the guide tube, which is defined by a distal-side stop surface of the proximal-side stop element and a proximal-side stop surface of the distal-side stop element.
- the maximum acceleration path of the projectile corresponds in particular to the maximum longitudinal dimension of the Cavity minus the pro ectile length if the proximal-side stop element is arranged flush at the proximal end of the guide tube and the distal-side stop element is arranged flush at the distal end of the guide tube.
- the longitudinal dimension of the cavity can be 150 mm, for example.
- a “proj ectile” is in particular a body which is freely movable along the acceleration path within the cavity of the guide tube.
- the projectile is in particular movable back and forth between the proximal-side stop element and the distal-side stop element within the cavity of the guide tube arranged between them , wherein the projectile is surrounded by the control sleeve.
- the projectile can have any shape.
- the projectile can have the shape of a bolt or a ball.
- the projectile has in particular hard steel and / or magnetic properties.
- the projectile has a slightly smaller outer diameter than the diameter of the cavity Control sleeve on.
- the project can be one
- the projectile can be moved back and/or back in particular between the proximal-side stop element and the distal-side stop element and thus along the acceleration path continuously by means of the pressure medium of the drive device.
- the projectile is continuously intermittently and/or oscillatingly moved back and forth between the proximal-side stop element and the distal-side stop element.
- the projectile can have slightly chamfered edges at its distal end and/or proximal end.
- a “driver element” is in particular an element which is firmly or loosely connected in and/or arranged on an outer surface of the projectile and rests on the inside of the inner surface of the control sleeve with its side opposite the projectile.
- the driver element is in particular designed in such a way that, due to friction and/or adhesive forces, when a projectile is moving in the control sleeve, it takes the control sleeve along due to the contact, whereby the control sleeve is moved along with the projectile.
- the driver element can, for example, be partially or completely radially circumferential Groove can be arranged in the projectile.
- the driver element has in particular a polymer, such as polyoxymethylene.
- the driver element can also be, for example, a Use a Teflon rod or tube bent into a ring.
- the driver element can also have nylon, which has low wear properties.
- the driver element can also be of a fibrous or textile nature, e.g. B. Felt, fleece, woven, knitted and/or knitted fabrics.
- the driving element only causes the friction and/or adhesion necessary for driving and minimal wear.
- the driver element can seal the projectile and the inside of the control sleeve from one another, but the driver element does not necessarily have to be tight.
- a non-sealing driver element causes the pressure medium, which flows into the cavity of the control sleeve at one end of the guide tube and/or the control sleeve and thus acts on the corresponding end of the projectile, also to the side of the projectile in the direction of flow can flow to the other end of the projectile and/or guide tube and flow out through the corresponding opening of the control sleeve and through opening of the guide tube, thereby preventing unwanted overpressures, for example in the event of a blockage.
- a “drive device” can in principle be any type of device which, by supplying and/or removing a pressure medium, causes a force on the projectile and thus a movement of the projectile.
- the drive device enables in particular a continuous and even flow of the pressure medium through the proximal-side and distal-side through-openings of the guide tube and the proximal-side and distal-side openings of the control sleeve, for example pneumatically using compressed air, and an acceleration of the projectile within the cavity of the control sleeve and/or the guide tube.
- a “pressure medium” is in particular a fluid.
- a pressure medium can be a gas, such as compressed air.
- the pressure medium can, for example, be taken from a house pressure supply and/or generated by a compressor.
- the pressure medium is supplied and/or removed from the lithotripsy device in particular continuously and/or circulated.
- the pressure medium in particular has a pressure in a range from 0 to 10 bar. Due to the continuous supply and removal of the pressure medium, it can also be free of alternating loads Print of
- the "control sleeve” is in particular an elongated hollow body, the length of which has a larger dimension than its diameter.
- the control sleeve has, in particular, a cavity in its interior in which the projectile can move in the longitudinal direction.
- the control sleeve is in particular tubular with an open proximal end and an open distal end.
- the control sleeve can also be designed as a hollow cylinder, with at least one opening being arranged in each end face.
- the control sleeve in particular has a smaller diameter than that Guide tube on .
- the control sleeve in particular has at least one proximal-side opening and at least one distal-side opening for the passage of the pressure medium, wherein the proximal-side opening and the distal-side opening can each be formed on the end face and/or in the lateral surface of the control sleeve.
- the control sleeve is in particular arranged in the cavity of the guide sleeve so that it cannot rotate, so that the respective proximal-side through-opening of the guide tube with the proximal-side opening of the control sleeve and the distal-side through-opening of the guide tube with the proximal-side opening of the control sleeve can be aligned with one another in such a way, that the pressure medium flows continuously through the respective through-opening of the guide tube and the corresponding opening of the control sleeve and thus a first valve opening position or a second valve opening position can be set.
- An anti-rotation device for the control sleeve can be realized, for example, by a guide and/or control wire, which is soldered to the control sleeve in a soldering groove in the control sleeve, exits through a hole in the proximal direction from the carrier unit and/or lithotripsy device and has an operating element, such as a handle, is completed.
- This means that the control sleeve is secured against rotation and can be controlled by the user at the same time.
- the control sleeve is in particular arranged concentrically to the guide tube.
- the control sleeve in particular has a length which is shorter than the length of the guide tube.
- the control sleeve can have a length that is 2 mm to 30 mm, in particular 3 mm to 20 mm, preferably 4 mm to 10 mm, shorter than the length of the guide tube.
- the control sleeve with its proximal and distal openings is designed, in particular, to be axially symmetrical to its longitudinal axis and/or transverse axis.
- control sleeve and its at least one proximal-side opening and at least one distal-side opening are designed in particular in such a way that, in the event, for example, of the control sleeve striking the distal-side stop element, the distal-side passage opening of the guide tube passes through the outer wall of the adjacent and struck control sleeve is closed.
- the control sleeve stops on the proximal side of the stop element on the proximal side the passage opening on the proximal side of the guide tube is closed by the side wall of the control sleeve.
- the “longitudinal center axis” is in particular the axis of the control sleeve which corresponds to the direction of its greatest extent. [27] One proximal and one distal
- “Through openings” are each a breakthrough through the wall of the guide tube.
- a proximal-side “opening” and a distal-side opening are a breakthrough through a wall of the control sleeve (also called valve bores).
- the proximal-side opening and the distal-side opening or openings can in particular be present continuously in the lateral surface of the control sleeve and/or on their end faces on both sides at the proximal end or distal end.
- the open tube end of the control sleeve can thus form a proximal-side opening and/or a distal-side opening.
- the through opening or the through openings of the guide tube as well as the distal and proximal openings of the control sleeve can each be a bore. These through openings and/or openings in particular have a relatively large diameter, so that essentially no pressure loss occurs.
- the respective through opening of the guide tube and/or the opening of the control sleeve can have a diameter in a range of 2 to 3 mm with a diameter of the guide tube of 6 mm.
- the through openings and the valve openings are therefore designed with as little flow resistance as possible with large cross sections.
- the openings of the control sleeve can have a chamfer on the inside of the cavity of the control sleeve in order to avoid wear and/or chip formation on the projectile.
- a "sonotrode” is in particular a component which is itself caused to vibrate, resonate and/or deform by the action and/or introduction of mechanical vibrations.
- a sonotrode is in particular an elongated component.
- a sonotrode is In particular, it is a probe which is designed, for example, in the shape of a rod, tube and/or tube.
- the sonotrode can be a hollow probe.
- the sonotrode can be designed in one piece or in several parts.
- the sonotrode in particular has a diameter in a range of 0.5 mm to 4.5 mm, in particular from 0.8 mm to 3.8 mm.
- the sonotrode has in particular steel, titanium, aluminum and/or carbon.
- a specifically shaped deformation wave is imprinted on the sonotrode.
- the deformation wave causes in particular a translational movement of the sonotrode, which, due to the deflection, results in improved stone fragmentation.
- the sonotrode can also be excited into a vibration, in particular longitudinal vibration, in particular by means of a vibration excitation device, for example with an ultrasonic vibration exciter.
- the sonotrode is therefore designed in particular as a waveguide for the vibration waves generated by a vibration excitation device and/or for the shock waves and/or deformation waves of the projectile.
- the proximal end of the sonotrode can in particular rest directly or indirectly on the distal stop element.
- the sonotrode is joined on the proximal side in a thread/retaining nipple that is thicker than its diameter.
- the corresponding nipple can also be a head piece.
- the head piece of the sonotrode is preferably movably mounted.
- the sonotrode is in particular shaped in such a way that it optimally introduces the vibration waves, deformation waves, shock waves and/or the ultrasonic vibration at its distal end into the body, the body region to be treated and/or directly onto the body stone to be shattered.
- control sleeve has a second proximal-side opening, a third proximal-side opening, a fourth proximal-side opening and/or further proximal-side openings and/or a second distal-side opening, a third distal-side opening Opening, a fourth distal opening and/or further distal openings.
- proximal-side openings and/or several distal-side openings can each be distributed over the cross section of the control sleeve and/or radially circumferentially around the outer surface of the control sleeve, as a result of which a more uniform flow occurs along the cross section by means of the pressure medium.
- the flow resistance can be reduced accordingly through several proximal and/or distal openings.
- the guide tube has a second proximal-side through-opening, a third proximal-side through-opening, a fourth proximal-side through-opening and/or further proximal-side through-openings and/or a second distal-side through-opening, a third distal-side through-opening opening, a fourth distal-side through-opening and/or further distal-side through-openings.
- the proximal-side through-openings and/or the distal-side through-openings can also be arranged at a distance in the longitudinal direction and thus along the longitudinal central axis of the control sleeve.
- the first proximal-side through-opening through which the pressure medium flows into the cavity of the guide tube can be arranged closer to the proximal end of the guide tube than a second proximal-side through-opening through which the pressure medium flows out of the cavity of the guide tube again.
- the first proximal-side passage opening with the inflowing pressure medium or the second proximal-side passage opening with the outflowing pressure medium can be in each case the movement of the projectile and the target
- Valve opening position can be closed. This applies analogously to the distal through openings.
- the second, third, fourth and/or further proximal-side or distal-side openings are, in terms of their design and function, a proximal-side opening or distal-side opening defined above. However, these further proximal or distal openings can be arranged at a different position of the control sleeve. Likewise, the second, third, fourth and/or further proximal-side or distal-side through-openings are a proximal-side or distal-side through-opening defined above, wherein the respective through-opening can also be arranged at a different position of the guide tube.
- openings and/or the through openings can also have a different cross section, but these openings and/or through openings preferably have the same cross section in order to ensure a uniform flow.
- these further proximal-side and/or distal-side through openings are formed continuously through the lateral surface.
- the distal-side opening, the respective distal-side opening and/or the distal-side openings is or are arranged at the distal end and/or in a lateral surface of the control sleeve and/or the proximal-side opening, the respective proximal-side opening and/or the proximal-side openings are arranged at the proximal end and/or in the lateral surface of the control sleeve.
- the guide tube has on its inner surface an at least partially radially circumferential recess or a plurality of at least partially radially circumferential recesses for guiding the pressure medium around the control sleeve.
- the pressure of the print medium can be used all around the recess Control sleeve are distributed and consequently a local overpressure and / or undesirable friction between the outer surface of the control sleeve and the inner surface of the guide tube can be avoided.
- a “recess” is in particular an incision and/or a depression in the inner surface of the guide tube.
- the recess can in particular be designed as an annular or partially annular groove running radially in the inner surface of the guide tube.
- two or more separate chambers for passing pressure medium through to and/or are provided between an outer surface of the guide tube and an inner surface of the carrier unit. or arranged by the at least one proximal-side through-opening or the proximal-side through-openings and/or the at least one distal-side through-opening or the distal-side through-openings.
- a distance between the inner housing wall of the lithotripsy device and the outer surface of the guide tube can be used to divide the volume formed thereby into two inlet and outlet air chambers by means of four septa or separating elements.
- the chambers are separated from one another, particularly in the longitudinal direction, by septa or separating elements separated and run along the outside of the guide tube.
- a rod for example, can be arranged as a separating element between the chambers.
- the supply air chambers and the exhaust air chambers can each be arranged alternately all around the guide tube, so that two supply air chambers and two exhaust air chambers lie opposite each other.
- the distal-side stop element and/or the proximal-side stop element has a spring element for repulsing the projectile.
- Valve opening position due to the switching of the through openings for supplying the pressure medium, the projectile is not accelerated by the flowing pressure medium for a moment.
- the reversal of movement is actively initiated and accelerated by a spring element of the distal-side stop element and/or the proximal-side stop element.
- This means that the control sleeve is taken along by means of the driver element
- the corresponding through-opening of the guide tube is released and the projectile is further accelerated by flowing the pressure medium through this through-opening of the guide tube and the corresponding corresponding opening of the control sleeve.
- a “spring element” is in particular any element and/or component that can be deformed sufficiently elastically to overcome a short-term counterpressure at the reversal point of the reversal of movement of the projectile on the distal stop element or proximal stop element.
- a spring element For example, it is a helical spring and thus a wire wound in a helical shape with a sufficient energy storage capacity.
- the spring element can also be arranged on the distal side and/or proximal side of the projectile.
- the spring of the spring element can be arranged in a tube, the tube being preferred has the same inner diameter as the control sleeve, so that the projectile can enter the cavity of the tube of the spring element when it stops when the projectile compresses the spring. Slightly chamfered edges at the entering end of the projectile can prevent the formation of chips during the transition the tube of the spring element can be prevented.
- the projectile and the control sleeve have a spring element on the distal side and/or the proximal side, in particular a compressed gas spring.
- the lithotripsy device has at least one connection port for connecting to the drive device and for continuously feeding or discharging the print medium.
- the drive device can therefore be connected to the connection port of the lithotripsy device using a hose, for example.
- the Lithotripsy device also has a second connection connection or further connection connections.
- the supply air and exhaust air can each be directed specifically into and/or out of the lithotripsy device via a respective connection port.
- the connection connection or connections are preferably arranged on the proximal side on the outside of the lithotripsy device so that the hose connections to the drive device do not impair the handling of the lithotripsy device.
- a “connection connection” is any connection element that ensures a connection between the drive device and the lithotripsy device.
- a connection connection is in particular a short piece of pipe, such as a hose connector, a hose nozzle or a hose coupling
- a connection connection can also simply be an opening in the housing wall of the lithotripsy device. This opening can, for example, have an internal thread for screwing in a hose nozzle. Such an opening can also be designed without a thread and the pressure medium simply flows through this opening into the lithotripter or freely out into the environment.
- Lithotripsy device is or can be applied by means of the drive device to the cavity or a part of the cavity of the guide tube and/or the cavity or a part of the cavity of the control sleeve, a negative pressure and/or an excess pressure.
- the driver element has an at least partially annular friction element on and/or in a surface of the projectile and/or a medium for viscous friction.
- the driving of the control sleeve by means of the driving element can be based on friction, adhesion and/or viscosity.
- the driver element for example as an O-ring, it can also be partially annular and / or C-shaped, such as a clamping ring or piston ring.
- the driving element itself can also be formed by a medium, for example oil.
- a medium for example oil.
- an oil film on the outer surface of the control sleeve can be sufficient as a driving element.
- An adhesive or a gel can also be used as a driving element.
- the driver element has a magnetic element and the control sleeve has a countermagnet element.
- the lithotripsy device and/or the carrier unit has an operating unit for starting, stopping and/or individually triggering a movement of the projectile .
- the movement of the control sleeve and/or the projectile can be controlled from the outside by an operator using a control mechanism on the operating unit.
- the operating unit and/or individual operating elements are arranged ergonomically on the outside of the carrier unit and/or the housing of the lithotripsy device.
- the lithotripsy device has a counter bearing and a horn and at least one piezo element is arranged and mechanically coupled as a vibration exciter between the counter bearing and the horn, the horn being the distal side Has stop element and / or the horn can be connected to the distal-side stop element and / or the sonotrode and the at least one piezo element can be electrically connected to an assignable ultrasound generator, so that a combined vibration excitation of the sonotrode can be realized by means of the drive device and the at least one piezo element.
- the sonotrode can be excited simultaneously both by a constant vibration excitation and by a repetitive impact excitation by imposing deformation waves. This achieves further increased efficiency in crushing body stones by means of a dual shattering and/or action mechanism. It is particularly advantageous that a substantially constant ultrasonic energy can be supplied to the sonotrode by means of the vibration exciter, for example an ultrasonic generator, and the at least one piezo element, while a repeating, intermittent, but very uniform ballistic deformation wave energy can be transferred to the sonotrode by means of the drive device , whereby the latter can produce a large distal velocity with a simultaneously high amplitude with a frequency of > 13 Hz.
- the vibration exciter for example an ultrasonic generator
- the at least one piezo element while a repeating, intermittent, but very uniform ballistic deformation wave energy can be transferred to the sonotrode by means of the drive device , whereby the latter can produce a large distal velocity with a simultaneously high amplitude with a frequency of > 13 Hz.
- a "horn” is in particular a component which is arranged between the vibration exciter and the sonotrode.
- the horn serves in particular to forward and/or direct the ultrasonic waves generated by the vibration exciter to the sonotrode.
- the horn can also be used for attachment the sonotrode can be used.
- the horn serves, in particular together with a counter bearing, for mechanically holding the vibration exciter on both sides.
- a “vibration exciter” is in particular a component of an ultrasonic transducer and/or a lithotripsy device, which converts the supplied alternating voltage with a specific frequency into a mechanical oscillation frequency.
- the vibration exciter is in particular an electromechanical transducer using the piezoelectric effect.
- the vibration exciter has in particular one piezo element or several piezo elements.
- the vibration exciter preferably has at least two piezo elements, with an electrical conductor, for example a copper disk, between the piezo elements.
- the sonotrode operates in particular in the ultrasonic range with a frequency range of 20 kHz to 90 kHz, preferably from 20 kHz to 34 kHz.
- the object is achieved by a method for accelerating a projectile of a lithotripsy device, wherein the lithotripsy device has a guide tube with a cavity and a control sleeve in the cavity of the guide tube, wherein in a cavity of the control sleeve the between a proximal stop element and a distal-side stop element movable projectile is arranged and the movable projectile has a driver element for driving the control sleeve, the lithotripsy device can be assigned a drive device for supplying and / or removing a pressure medium, the guide tube has at least one proximal-side through-opening and at least one distal-side through-opening Supplying and/or discharging the pressure medium into and/or out of its cavity and the control sleeve has at least one proximal-side opening and at least one distal-side opening for the pressure medium, with the following steps:
- the user can very easily and quickly, after starting the lithotripsy device, realize a repetitive back and forth movement of the projectile along the acceleration path using the self-exciting projectile with the switching control sleeve, without having to rely on pressures and valve circuits of an external pressure medium supply must be respected.
- the method described above refers to an overpressure operation; in a negative pressure operation, a suction pressure is applied to the distal-side passage opening of the guide tube and thus to the corresponding distal-side opening of the control sleeve in order to move the projectile towards the distal-side stop element.
- the suction pressure is applied to the proximal-side passage opening of the guide tube and the distal-side opening of the control sleeve.
- Figure 1 is a highly schematic three-dimensional
- Figure 2 is a schematic representation of the
- Lithotripsy device with a guide tube and a control sleeve in a longitudinal section when a projectile moves in the distal direction
- FIG. 3 is a highly schematic representation of the
- Figure 4 is a highly schematic representation of the
- a lithotripsy device 101 has a carrier unit 103 with a central housing tube 105. At a proximal end of the housing tube 105, a proximal end cap 107 is screwed onto the housing tube 105 by means of a proximal lock nut 109. Likewise, a distal end cap 111 is screwed onto the distal end of the housing tube 105 by means of a distal lock nut 113 (see FIG. 1 and FIG. 2). At the proximal end of the proximal end cap 107 there is a first exhaust port 151 and a second exhaust port 153, which is not visible in FIG. 1.
- a first supply air connection 155 and a second supply air connection 156 are arranged on the proximal side of the proximal end cap 107.
- a suction line 119 for suctioning off body stone fragments is guided against a distal direction 115 to the proximal end of the lithotripsy device 101.
- the suction line 119 is only shown symbolically in FIG. 1 and has impractically narrow bending radii.
- an operating element 117 at the proximal end of the carrier unit 103 is shown only symbolically, with the operating element 117 being optimally ergonomically arranged on the housing tube 105 in an alternative embodiment.
- the control element 117 is equipped with a control sleeve 131 arranged inside the housing tube 105 for starting and switching off as well as for a Single and/or continuous bombardment using the ballistic lithotripsy device 101 is designed.
- An elongated sonotrode 211 designed as a hollow probe with a sonotrode tip 213 is arranged at the distal end of the carrier unit 103 .
- a guide tube 121 is arranged at a distance from the housing tube 105, with two inlet air chambers 157 and outlet air chambers 159 arranged symmetrically across the cross section between an inner wall of the housing tube 105 and an outer wall of the guide tube 121 are, which are connected via holes in the proximal end cap 107 to the cross-arranged first exhaust air connection 151 and the second exhaust air connection 153 as well as the first supply air connection 155 and the second supply air connection 156 (in Figure 2, the one supply air chamber 157 is located behind a fifth through hole 127 and is only visible through this, while the second supply air chamber is in front of the viewing plane).
- the supply air chambers 157 and the exhaust air chambers 159 extend over the entire length of the guide tube 121.
- the two exhaust air connections 151, 153 and the two supply air connections 155, 156 are each connected to a Y-connector, not shown
- Exhaust air hose and an inlet air hose of a drive device, not shown, are connected.
- the guide tube 121 has a first through-hole 123 and a fourth through-hole 126 on the proximal side, each of which is connected to one of the two exhaust chambers 159.
- the guide tube 121 points distally a second through hole 124 and a third through hole 125, each of which is connected to one of the two exhaust chambers 159.
- the guide tube 121 has a fifth through-hole 127 on the proximal side and a further through-hole located opposite and therefore not visible in FIG not shown in Figure 2). All through holes 123, 124, 125, 126, 127 each pass transversely through the lateral surface of the guide tube 121 and each have a diameter of 3 mm.
- control sleeve 131 Arranged inside the guide tube 121 is the control sleeve 131, which has a first valve hole 133 and a fourth valve hole 136 on the proximal side corresponding to the proximal through holes 123, 126 of the guide tube 121. Accordingly, a second valve bore 134 and a third valve bore 135 are introduced into the control sleeve 131 on the distal side.
- the control sleeve 131 is arranged inside the guide tube 121 so that it cannot rotate, so that the corresponding through holes of the guide tube 121 and the valve holes of the control sleeve 131 can pass freely in a respective valve opening position.
- the control sleeve 131 has a hollow space 141 on the inside, which at the same time forms an acceleration path for a projectile 143.
- the projectile 143 has one on its outer surface Driver ring 145, which rests on the outside of an inner surface of the control sleeve 131.
- the control sleeve 131 is 4 mm shorter than the guide tube 121.
- a return spring 171 is arranged in a cladding tube, which is held in the proximal end cap 107 by means of a holder 173.
- a tempering spring 181 is arranged for impressing a defined deformation wave on the sonotrode 211 due to the mechanical shock of the projectile 143.
- the tempering spring 181 has a large number of stacked polymer disks 191 in the distal direction 115, which are surrounded on the outside by a cladding tube 185.
- the cladding tube 185 is held in the distal end cap 111 by means of a holder 183.
- a proximal end cap 187 is arranged, which has an O-ring 193 on the inside and is movably caught and held by means of a welding ring 195, which is welded to the cladding tube 185.
- a distal end cap 189 is arranged on the distal side, which is also movably held by means of a flange on the cladding tube 185 and also has an 0-ring 193 on the inside.
- the distal end of the return spring 171 represents a proximal stop element and the proximal end cap 187 of the tempering spring 181 represents a distal-side stop element for the projectile 143.
- the figure 2 shows the state in which the control sleeve 131 is struck in a distal direction 115 against the distal-side stop element formed by the proximal end cap 187 of the tempering spring 181. Since the control sleeve 131 is 4 mm shorter than the guide tube 121, the cavity of the guide tube 121 in the area of the fifth passage opening 127 on the proximal side is free of the control sleeve 131.
- the first valve bore 133 of the control sleeve 131 is on the first through bore 123 of the guide tube 121 and the fourth valve bore 136 of the control sleeve 131 is on the fourth through bore 126 of the guide tube 121 is pushed at a defined stop of the proximal end of the control sleeve 131 against the distal end wall of the cladding tube of the return spring 171, whereby the respective through hole and valve hole are continuous for the exit of exhaust air into the exhaust chambers 159.
- the fifth through hole becomes 127 and the one opposite does not Visible additional through hole closed for the passage of supply air.
- the control sleeve 131 is again taken along by the projectile 143 by means of the driver ring 145 and this creates the fifth through hole 127 and the opposite, invisible one Through hole opened.
- supply air enters the cavity 141 of the control sleeve 131 and moves the projectile 143 further in the distal direction 115 until the state shown in FIG. 2 is reached again.
- a head piece 215 of the sonotrode 211 is arranged on the distal side of the tempering spring 181, the head piece 215 being movably mounted in a guide part 216 at its proximal end and its distal end by means of O-rings 217.
- the head piece 215 has a transverse bore 221 in which a plunger 223 loosely engages with an operating handle 225 to prevent rotation and to remove body stone fragments.
- the plunger 223 is held in position by a spring not shown in FIG. 2. By pressing the plunger 223 into the transverse bore 221 using the operating handle 225, fragments of body stones can be removed from the head piece 215.
- a damping element 219 is arranged on the distal side of the head piece 215 to limit an amplitude of the sonotrode 211.
- the tempering spring 181 is introduced, which together with a respective elastomer ring 205 each form a pressure relief valve 201 to the holder 183 of the tempering spring 181 and to the head piece 215 of the sonotrode 211 in order to prevent the effect of excess pressure in the patient when using the lithotripsy device 101 when it occurs to prevent an error.
- the lithotripsy device 101 with the guide tube 121 and the internal control sleeve 131 is shown in a very simplified manner in Figures 3 and 4, in which there is only one through opening for supply air and exhaust air on the distal and proximal sides For illustration reasons these are also shown on the same level.
- the guide tube 121 has a fifth through-hole 127 for supply air and a fourth through-hole 126 for exhaust air on the proximal side, which pass through a lateral surface of the guide tube 121 and are slightly offset along a longitudinal central axis 149 of the guide tube 121 and the control sleeve 131, which are arranged concentrically to one another are .
- the guide tube 121 On the distal side, the guide tube 121 has a sixth through-hole 128 for supply air and a third through-hole 125 for exhaust air, which are also arranged offset along the longitudinal central axis 149. Opposite the fifth through hole 127, the sixth through hole 128, the third through hole 125 and the fourth through hole 126, there is each a recess 148 as a radially circumferential groove in the inner surface of the Guide tube 121 is formed, the radially circumferential groove having a greater width than a diameter of the respective through hole 125, 126, 127, 128.
- the control sleeve 131 arranged in the cavity of the guide tube 121 has a fifth valve bore 137 and an opposite fourth valve bore 136 on the proximal side. On the distal side, the control sleeve 131 has a sixth valve bore 138 and an opposite third valve bore 135.
- a projectile 143 is arranged in the cavity 141 and has a driver ring 145 on its outer surface, which is in external contact with the inner surface of the control sleeve 131 .
- the projectile 143 is movable within the cavity 141 along an acceleration path between a proximal stop element 165 and a distal stop element 167.
- the projectile 143 has a proximal spring element at its proximal end
- the two spring elements 146, 147 are each arranged on the proximal stop element 165 and the distal stop element 167 (as described above for FIG. 2).
- the lithotripsy device 101 is started by means of an operating element and compressed air is continuously supplied by a drive device (not shown in Figures 3 and 4) in a supply air direction 161 through the fifth through hole 127 and/or the sixth Through hole 128 of the guide tube 121 promoted. Likewise, the compressed air from the cavity 141 continuously leaves the guide tube 121 in an exhaust air direction 163 through the third through-hole 125 and/or the fourth through-hole 126.
- Figure 3 shows a state in which the entrained control sleeve 131 is struck with its distal end against the distal stop element 167 in a projectile movement direction 144 in the distal direction 115 just when the projectile 143 moves due to the entrainment by the driver ring 145 is .
- the sixth through hole 128 of the guide tube 121 is blocked by the control sleeve 131, while the offset third through hole 125 of the guide tube 121 is opened, so that compressed air is pressed out of the third through hole 125 as exhaust air in the distal direction 115 due to the projectile movement direction 144.
- the fifth through hole 127 of the guide tube 121 is exposed, so that compressed air as supply air presses through this fifth through hole 127 and the exposed proximal tube opening of the control sleeve 131 directly onto the proximal end of the projectile 143 and pushes it further in the projectile movement direction 144 moves until it hits the distal stop 167.
- the fourth through hole 126 which is offset from the fifth through hole 127, is through the control sleeve 131 attached to the distal stop element 167 closed, so that the incoming compressed air is only used to move the projectile 143 in the direction of movement 144 and cannot flow out (see Figure 3).
- the projectile 143 After the projectile 143 has struck the distal stop element 167, it is repulsed due to the distal spring element 147 and moved in the opposite direction to the distal direction 115. Due to the driver ring 145, the projectile 143 takes the control sleeve 131 in the proximal direction until the control sleeve 131 is abutted with its proximal end on the proximal stop element 165 (see state as shown in FIG. 4). The projectile 143 then moves further alone in the projectile movement direction 144 against the distal direction 115.
- the sixth through hole 128 is now exposed at the distal end of the guide tube 121 and the compressed air flows continuously through this sixth through hole 128 and directly through the distal pipe opening of the control sleeve 131 towards the distal end of the project ectile 143, whereby it is moved further in the projectile movement direction 144 against the proximal stop element 165.
- the third through hole 125 of the guide tube 121 at the distal end section of the guide tube 121 is closed by the control sleeve 131 attached on the proximal side.
- the fifth through hole 127 for supplying the compressed air is closed on the proximal side through the attached control sleeve 131, while the fourth one, which is offset and opposite Through hole 126 is open for discharging the compressed air compressed by the movement of the projectile 143 in the projectile movement direction 144. Due to the grooves in the inner surface of the guide tube 121, which are machined all around at the level of the through holes 125, 126, 127 and 128, which are visible in Figures 3 and 4 as oppositely arranged recesses 148, the compressed air is optimally evenly distributed radially around the control sleeve 131 distributed.
- the projectile 143 is repulsed when it hits the proximal-side stop element 165 due to the proximal-side spring element 146 and is thereby moved again in the distal direction 115.
- the control sleeve 131 is again taken along in the distal direction 115 and the processes described above are constantly repeated.
- a lithotripsy device 101 in which an automatic valve changeover for moving a self-exciting projectile back and forth along an acceleration path is realized internally by the design of the guide tube 121, the control sleeve 131 and the projectile 143, the process with a continuous flow through the guide tube
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022109138.4A DE102022109138B4 (de) | 2022-04-13 | 2022-04-13 | Lithotripsievorrichtung zum Zertrümmern von Körpersteinen mit einer Steuerhülse und Verfahren zum Beschleunigen eines Projektils einer Lithotripsievorrichtung |
| PCT/EP2023/058680 WO2023198494A1 (de) | 2022-04-13 | 2023-04-03 | Lithotripsievorrichtung zum zertrümmern von körpersteinen mit einer steuerhülse und verfahren zum beschleunigen eines projektils einer lithotripsievorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4507594A1 true EP4507594A1 (de) | 2025-02-19 |
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ID=85873931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23715172.5A Pending EP4507594A1 (de) | 2022-04-13 | 2023-04-03 | Lithotripsievorrichtung zum zertrümmern von körpersteinen mit einer steuerhülse und verfahren zum beschleunigen eines projektils einer lithotripsievorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4507594A1 (de) |
| DE (1) | DE102022109138B4 (de) |
| WO (1) | WO2023198494A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022133520B3 (de) * | 2022-12-15 | 2024-01-11 | Karl Storz Se & Co. Kg | Haltevorrichtung für eine Lithotripsievorrichtung zum Zertrümmern von Körpersteinen und Lithotripsievorrichtung |
| DE102022133521B3 (de) * | 2022-12-15 | 2024-02-29 | Karl Storz Se & Co. Kg | Haltevorrichtung für eine Lithotripsievorrichtung und Lithotripsievorrichtung zum Zertrümmern von Körpersteinen |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10029580C1 (de) * | 2000-06-15 | 2002-01-10 | Ferton Holding Sa | Vorrichtung zum Entfernen von Körpersteinen mit einem intrakorporalen Lithotripter |
| DE202010001176U1 (de) | 2010-01-19 | 2011-05-26 | Storz Medical Ag | Medizinisches Druckwellengerät |
| DE202010007860U1 (de) | 2010-06-11 | 2011-09-27 | Storz Medical Ag | Druckwellengerät mit pneumatischem Antrieb |
| DE102020105457B4 (de) * | 2020-03-02 | 2022-09-01 | Karl Storz Se & Co. Kg | Lithotripsievorrichtung |
| DE102020117713B4 (de) | 2020-07-06 | 2024-11-07 | Karl Storz Se & Co. Kg | Lithotripsievorrichtung und Verfahren zum Betrieb einer Lithotripsievorrichtung |
-
2022
- 2022-04-13 DE DE102022109138.4A patent/DE102022109138B4/de active Active
-
2023
- 2023-04-03 EP EP23715172.5A patent/EP4507594A1/de active Pending
- 2023-04-03 WO PCT/EP2023/058680 patent/WO2023198494A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023198494A1 (de) | 2023-10-19 |
| DE102022109138B4 (de) | 2024-06-20 |
| DE102022109138A1 (de) | 2023-10-19 |
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