EP4422524A1 - Lithotripsievorrichtung zum zertrümmern von körpersteinen, lithotripsiesystem, nachrüstsatz zum nachrüsten einer bestehenden lithotripsievorrichtung und verfahren zum betreiben einer lithotripsievorrichtung - Google Patents
Lithotripsievorrichtung zum zertrümmern von körpersteinen, lithotripsiesystem, nachrüstsatz zum nachrüsten einer bestehenden lithotripsievorrichtung und verfahren zum betreiben einer lithotripsievorrichtungInfo
- Publication number
- EP4422524A1 EP4422524A1 EP22823027.2A EP22823027A EP4422524A1 EP 4422524 A1 EP4422524 A1 EP 4422524A1 EP 22823027 A EP22823027 A EP 22823027A EP 4422524 A1 EP4422524 A1 EP 4422524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sonotrode
- vibration
- excitation element
- lithotripsy
- vibration excitation
- 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
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000009911 Urinary Calculi Diseases 0.000 description 1
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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
- A61B17/225—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 for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves
-
- 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
- A61B2017/22015—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 with details of the transmission member
Definitions
- the invention relates to a lithotripsy device for breaking up bodily stones, the lithotripsy device having a hand-held device with an ultrasonic vibration exciter with an ultrasonic vibration exciter outer diameter and a sonotrode which can be connected to the hand-held device on the distal side and has a longitudinal central axis and a sonotrode outer diameter, with the sonotrode being a first vibration can be excited, and the lithotripsy device has a vibration exciting element with a through opening, wherein the vibration exciting element with the through opening is arranged around the sonotrode outer diameter and/or around the ultrasonic vibration exciter outer diameter. Furthermore, the invention relates to a
- Lithotripsy system a retrofit kit for retrofitting an existing lithotripsy device and a method of operating a lithotripsy device.
- Lithotripsy is a known method for breaking up bodily stones, which form as so-called calculus in body organs, for example in the bladder or kidneys, as a result of the crystallization of salts. If the body stones are too big for a natural one If they pass and cause discomfort, they must be crushed using a lithotripter so that the crushed stones can be removed by natural excretion and/or using a suction-irrigation pump.
- Such body stones are often not built up homogeneously, but have different components, layers and/or strengths.
- a body stone that has a soft calculus on the outside and a hard stone core on the inside therefore requires a higher shattering force of the shock waves emitted by the lithotripter as the shattering increases.
- US Pat. No. 9,421,023 B2 discloses a device for transmitting ultrasonic vibrations, in which the ultrasonic waveguide is accommodated in a waveguide fitting on the proximal side and on the distal side a first pulsatile mass followed by a compression spring and a second pulsatile mass are placed around the ultrasonic waveguide fitting.
- the second impact-pulsating mass is delimited on the distal side by an impact surface on which the second impact-pulsating mass impacts, excited by the ultrasonic vibration.
- the disadvantage here is that the second shock-pulsating mass is excited only by the high-frequency ultrasonic vibration and is directly dependent on it.
- the vibration behavior of the shock-pulsating mass and the shock waves it generates can only be influenced to a limited extent. Due to the arrangement of the compression spring between the two impact-pulsating masses on the outside around the ultrasonic waveguide, the compression spring, as a store, transmits the supplied ultrasonic energy only along the longitudinal center axis of the ultrasonic waveguide and the impact of the second impact-pulsating mass on the impact surface always occurs from the axial direction and thus coaxially to the longitudinal center axis of the ultrasonic waveguide. In addition, because of this limitation, the device cannot be subsequently integrated into ultrasonic transducers and sonotrodes that are already on the market.
- the object of the invention is to improve the prior art.
- a lithotripsy device for crushing body stones wherein the lithotripsy device is a hand-held device with an ultrasonic vibration exciter with a ultrasonic vibration exciter outer diameter and a sonotrode which can be connected to the hand-held device on the distal side and has a longitudinal center axis and a sonotrode outer diameter, the sonotrode being excitable in a first vibration by means of the ultrasonic vibration exciter, and the lithotripsy device has a vibration excitation element with a through opening, the vibration excitation element with the through opening is arranged around the sonotrode outer diameter and/or the ultrasonic vibration exciter outer diameter, the through opening of the vibration excitation element having a larger diameter than the sonotrode outer diameter and/or than the ultrasonic vibration exciter outer diameter, so that the vibration excitation element can move freely, and that Vibration excitation element has an imbalance, so that in the event of a rotation of the vibration excitation element to the sonotrode
- a lithotripsy device is provided with a defined dynamic and/or static imbalance of the vibration excitation element, which tumbles around the sonotrode upon excitation and/or rotation and thereby exerts axial and/or radial impulses on the sonotrode. Due to the unbalanced mass as the impact mass of the vibration excitation element and the resulting intermittent shocks to the sonotrode, the crushing performance of body stones and the Improved drilling ability of the sonotrode even with hard and/or inhomogeneous body stones.
- the shock impulses of the moving and/or tumbling vibration excitation element are superimposed with the continuous ultrasonic vibrations generated by the ultrasonic vibration exciter, so that two mechanisms of vibration excitation and stone crushing are effective simultaneously or intermittently.
- the vibration excitation element due to the larger diameter of its opening surrounding the sonotrode, a horn and/or the ultrasonic vibrator, compared to the outer diameter of the sonotrode, the horn and/or the vibrator on and around the sonotrode , the horn and/or the ultrasonic vibration exciter is free to move and just not fixed in one or more directions.
- vibration excitation element or a second vibration excitation element or several vibration excitation elements can also alternatively or additionally be arranged analogously around the horn and/or the ultrasonic vibration exciter can be arranged.
- the free mobility of the vibration excitation element around the sonotrode and its unbalance are not only regular, but temporal Irregular shock pulses can also be transmitted to the sonotrode locally and/or in terms of their strength.
- By superimposing the continuous ultrasonic vibration with the irregular shock impulses of the freely moving vibration excitation element on the connected sonotrode a combined effect and thus an improved stone removal compared to the sole ultrasound-based vibration excitation of the sonotrode is achieved.
- Due to the free mobility of the vibration excitation element the sonotrode also vibrates laterally and thereby reduces the contact time in the borehole of the bodily stone. This leads to less friction and less energy loss from the ultrasonic transducer.
- An essential idea of the invention is based on the fact that at least one vibration excitation element is arranged to be freely movable around a sonotrode (and/or horn and/or ultrasonic vibration exciter) and is not clamped by means of a compression spring as an energy store, which means that a free, disorderly impact of the Vibration excitation element is enabled from all spatial directions on the outer surface of the sonotrode when the vibration excitation element moves around and / or along the sonotrode and / or rotates.
- the vibration excitation element Due to the freely movable arrangement of the vibration excitation element around the sonotrode, it can be driven to move and/or rotate more easily, its drive can be adapted more easily and the vibration excitation element can also be retrofitted to sonotrodes and/or ultrasonic transducers already on the market.
- “Lithotripter” called) is in particular a device for breaking up body stones by shock waves.
- a lithotripsy device understood in particular various components, structural and / or functional components of a lithotripter.
- the lithotripsy device may fully or partially form a lithotripter.
- a lithotripsy device can in particular be an intracorporeal or extracorporeal lithotripsy device. In the case of an intracorporeal lithotripsy device, this can additionally 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 is made of instrument steel and/or plastic, for example.
- the lithotripsy device can have other components, such as a
- Body stones (also called “calculus”) are understood to mean, in particular, all stones in a human or animal body that form from salts through crystallization. Stones in the body can be, for example, gallstones, urinary stones, kidney stones and/or salivary stones.
- a "handheld device” is in particular a handle for manual and/or automated operation and/or connection of the lithotripsy device.
- the handheld device can be designed as a handheld and/or holding part.
- the handheld device can also be arranged on a distal end of a robot arm, connected and/or automated be guided.
- the hand-held device has a mount housing that can be plugged on.
- An "ultrasonic vibration exciter” (also called “vibration exciter”) is in particular a component of an ultrasonic transducer and/or handpiece of a lithotripsy device, which converts a supplied AC voltage with a specific frequency into a mechanical vibration frequency.
- the ultrasonic vibration exciter is in particular an electromechanical transducer utilizing the piezoelectric effect.
- an electrical AC voltage generated by an ultrasonic generator in particular a mechanical vibration is generated due to a deformation of the ultrasonic vibration exciter.
- the ultrasonic vibration exciter has, in particular, a piezo element or a plurality of piezo elements.
- the ultrasonic vibration exciter preferably has at least two piezo elements, it being possible for an electrical conductor, for example a copper disk, to be arranged between the piezo elements.
- the ultrasonic vibration exciter and/or the ultrasonic transducer can in particular have a horn.
- a "horn” is in particular a component which is arranged between the vibration exciter and/or a piezo element and the sonotrode.
- the horn serves in particular to transmit, forward and/or align the ultrasonic waves generated by the vibration exciter to the sonotrode the horn tapered and direct in a transmission direction or indirectly transmit the ultrasonic waves to a sonotrode head.
- the horn can also be used to attach the sonotrode.
- the horn in particular together with a counter bearing, serves to mechanically hold the piezo element or piezo elements on both sides.
- the "longitudinal central axis" is in particular that axis of the sonotrode which corresponds to the direction of its greatest extent.
- a "sonotrode” is, in particular, a component which is caused to vibrate and/or resonate itself by the action and/or introduction of mechanical vibrations.
- the sonotrode is excited in a first vibration, in particular by means of the ultrasonic vibration exciter.
- the sonotrode in particular in a second oscillation by means of the unbalance of the oscillation excitation element.
- the sonotrode is designed in particular as a waveguide for the shock waves (impulses) of the oscillation excitation element with the unbalance and/or the ultrasonic waves generated by the ultrasonic oscillation exciter.
- the sonotrode is in particular connected to the ultrasonic oscillation exciter, the ultrasonic transducer and /or connected to the horn.
- the sonotrode is screwed into the distal end of the horn.
- the sonotrode has a sonotrode head at its proximal end for receiving, forwarding and/or focusing ultrasonic waves and at its distal end a sonotrode tip for direct and/or indirect transmission Applying and / or contacting body stones.
- the sonotrode is in particular shaped in such a way that it optimally introduces the shock waves and/or the second vibration 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.
- the sonotrode works in particular in the ultrasonic range with a frequency range from 20 kHz to 90 kHz, preferably from 20 kHz to 34 kHz.
- the sonotrode has in particular steel, titanium, aluminum and/or carbon.
- a sonotrode is, in particular, a probe which is designed, for example, in the form of a rod, tube and/or hose.
- the sonotrode can be designed in one piece or in several parts.
- the sonotrode has a diameter in a range from 0.5 mm to 4.5 mm, in particular from 0.8 mm to 3.8 mm.
- the sonotrode has an outside diameter which is smaller than the opening of the vibration-exciting element.
- the "outer diameter” is in particular the outer diameter and thus the greatest possible distance between two points on the outer circular line of the sonotrode ("sonotrode outer diameter"), the horn and/or the ultrasonic vibration exciter ("ultrasonic vibration exciter outer diameter"). At the outer diameter it can in particular be the maximum diameter. However, the outer diameter can also be that diameter which is in the area of the sonotrode, the horn and/or the Ultrasonic vibration exciter is present, which is surrounded by the vibration excitation element.
- a "vibration excitation element” is understood in particular as a body, component and/or assembly which can be pushed onto the sonotrode, the horn, the ultrasonic vibration exciter and/or the ultrasonic transducer.
- the vibration excitation element has, in particular due to its properties, such as Shape, weight distribution and/or design and arrangement of its through-opening, a defined static imbalance and/or a dynamic imbalance.To make it easy to drive a movement and/or rotation of the vibration-exciting element, its total mass should be designed as small as possible.But its total mass can also be as high as possible so that the vibration-exciting element executes correspondingly hard impacts on the sonotrode.
- An "imbalance" is present in a rotating body in particular when its axis of rotation does not correspond to one of its main axes of inertia.
- An imbalance is in particular a static imbalance and/or a dynamic imbalance of the vibration excitation element.
- the imbalance leads in particular to vibrations, tumbling of the Vibration excitation element around the sonotrode and striking the inner surface around the through opening and / or the adjacent edges around the through opening of the vibration excitation element on the outer surface of the sonotrode.
- the static imbalance and/or the dynamic imbalance of the vibration excitation element is thus defined and can be used in a targeted manner to excite the sonotrode in a second vibration.
- a "static imbalance” is present in particular when the axis of rotation of the vibration-exciting element does not run through the center of gravity of the vibration-exciting element.
- the static imbalance generates in particular circular mechanical vibrations at right angles to the axis of rotation.
- a static imbalance can be generated in a targeted manner in that only an unbalanced element is attached to an outside of the vibration-exciting element.
- the unbalanced mass is in particular the product of the unbalanced mass and the distance from the axis of rotation.
- the unbalanced mass can be indicated in particular in the unit mm*g.
- a "dynamic imbalance" is present in particular when the axis of rotation of the vibration excitation element does not coincide with one of its stable main support axes, but is tilted at its center of gravity in relation to the main support axes.
- the dynamic imbalance causes a bending moment on the axis of rotation, especially during operation, which causes the Circular vibrations shifted by 180° can be caused at the ends of the axis of rotation.
- the rotating vibration excitation element remains in the rest position in particular, while the axes wobble due to the opposite circular movement.
- a dynamic imbalance can be caused, for example, by two opposing, but on different sides of the Vibration excitation element attached imbalance elements to be caused.
- the dynamic imbalance thus causes the vibration-exciting element to wobble and/or tilt in a manner deviating from the transverse axis, which is perpendicular to the longitudinal center axis of the sonotrode.
- the "first vibration" stimulated by the ultrasonic vibration exciter and the "second vibration” stimulated by the imbalance of the vibration excitation element differ in particular in their properties.
- the first vibration is in particular a regular and/or constant ultrasonic vibration.
- the first oscillation has a constant wavelength or a plurality of constant wavelengths.
- the second vibration, excited by the imbalance of the vibration-exciting element is in particular discontinuous and/or intermittent shock waves.
- the second vibration preferably has a greater intensity and/or amplitude.
- the second oscillation can also have a wavelength that changes over time.
- the first oscillation and the second oscillation thus differ in particular at least in one property, such as in their amplitude, wavelength, period duration and/or in an excited resonance oscillation of the sonotrode.
- “Rotation” is understood in particular as a rotational movement of the vibration excitation element.
- the rotation of the vibration excitation element is in particular the rotational movement of the vibration excitation element by one imaginary central axis as the axis of rotation through the continuous opening and/or around the longitudinal central axis of the sonotrode.
- the imaginary central axis does not necessarily have to be arranged transversely to the distal outer surface, which is horizontally aligned in the resting state, and the proximal outer surface of the vibration excitation element, but the continuous opening and thus the axis of rotation can also run obliquely through the vibration excitation element and thus not parallel to the longitudinal central axis of the sonotrode.
- a rotation does not necessarily have to be a complete rotation through 360° or several complete rotations, but a rotation is understood to mean in particular a partial rotation of ⁇ 360°.
- the vibration-exciting element can also move in one of the possible directions in space.
- the vibration excitation element is disk-shaped, ring-shaped, hollow-cylindrical and/or torus-shaped.
- the disc-shaped, annular and / or toroidal shape of the vibration excitation element is by arrangement of the wall thickness in the direction of the longitudinal center axis of the sonotrode and the longer Outside diameter in the transverse direction to the longitudinal center axis of the sonotrode, a wobbling of the vibrating element can be realized with a large deflection at the opposite outer areas around the outside diameter.
- the distal-side edge and the proximal-side edge impact alternately around the continuous opening on the outer surface of the sonotrode.
- the vibration-exciting element has an axis of rotation that deviates from the longitudinal central axis and/or its main axis of inertia.
- the axis of rotation of the vibration excitation element runs in the direction of the longitudinal center axis of the sonotrode, for example, from a point on the proximal side of the vibration excitation element at a smaller distance from the longitudinal center axis at an angle to a point on the distal side of the vibration excitation element at a greater distance from the longitudinal center axis of the sonotrode.
- the "axis of rotation” (also called “axis of rotation”) is in particular a straight line which describes a rotation or rotation of the vibration-exciting element.
- the axis of rotation of the vibration excitation element is in particular the physically real axis of rotation.
- the view of the vibration-exciting element changes, in particular when the vibration-exciting element is rotated at any desired angle.
- a "main axis of inertia” (also called “main axis”) is understood in particular as an axis of rotation of the vibration excitation element about which the vibration excitation element can be continuously rotated without a dynamic imbalance occurring.
- the main axis of inertia runs in particular through the center of gravity of the vibration excitation element.
- the vibration excitation element has an unbalanced element in its interior and/or on its outer surface.
- An "unbalanced element” can, for example, be a mass with a different material and/or weight than the main mass of the vibration-exciting element. By selecting the weight of the unbalanced element, its size, shape and/or its arrangement along the radius of the Vibration excitation element can be specifically set an imbalance and the rotational behavior and the impact behavior of the vibration excitation element can be influenced.
- the vibration excitation element has a recess.
- a "recess” is in particular a free space in the vibration excitation element, which is arranged in its interior and / or on its outer surface
- Recess can be a cavity, a recess and / or an incision in the vibration excitation element.
- a recess can also be an undercut.
- the unbalanced element and/or the recess is and/or are arranged on a distal side and/or a proximal side of the vibration excitation element.
- distal side is understood in particular as the side remote from the user and thus the side close to the body.
- proximal side is understood to mean the side close to the user and the side remote from the body.
- distal and proximal sides are in particular the two opposing circular or ring surfaces.
- the lithotripsy device has a drive device for driving the rotation of the vibration excitation element.
- the desired second oscillation of the sonotrode can be set flexibly by means of a second active drive device, which is used solely to specifically drive the rotational movement of the oscillation excitation element.
- this second drive device is independent of the excitation by the ultrasonic vibration exciter and is not limited by the structural design of the components of the ultrasonic vibration exciter.
- this drive device can also be used with existing ones
- a "drive device” is in principle any type of device that causes a force on the vibration-exciting element and thus a movement and/or rotation of the vibration-exciting element.
- the drive device has a nozzle for the action of a stream of compressed gas on the vibration-exciting element.
- the vibration excitation element can thus be driven directly in a simple manner by means of a compressed gas flow, for example compressed air.
- the drive and thus the supply of the Compressed gas stream done continuously and / or discontinuously.
- the movement frequency and pulse intensity of the vibration excitation element can thus be directly influenced by means of the geometry of the nozzle and/or regulation of the compressed air flow.
- the force, the moment and/or the speed of the vibration excitation element can be influenced quickly and directly by means of the compressed gas flow.
- the nozzle can be specifically aligned with and/or on the vibration-exciting element and the compressed gas stream can be applied to a defined position and/or location of the rotating vibration-exciting element.
- a "nozzle” is understood to mean, in particular, a technical component for influencing a fluid and/or compressed gas flow when it passes from a pipe flow into free space.
- the nozzle can have the same cross-sectional area over its entire length, can expand, narrow and/or or have a variable shape.
- the vibration excitation element In order to drive the rotation of the vibration excitation element in a defined and positioned manner, the vibration excitation element has a groove on a lateral surface for the effect of the compressed gas flow.
- the vibration excitation element preferably has a plurality of equally spaced grooves on its lateral surface around the entire circumference of the lateral surface, so that the compressed gas stream flows into the respective groove, which is in the effective area of the nozzle, and, as in an impeller, the vibration excitation element is driven to rotate.
- the "lateral surface" of the vibration excitation element is in particular that surface on which the vibration excitation element can be rolled.
- a "groove” is in particular an elongated depression in the vibration excitation element.
- One groove or several grooves are arranged in particular on and/or in the lateral surface in a radially circumferential manner. The fact that the compressed gas flow is directed into the respective groove by means of the nozzle and against the boundary wall at the end of the groove acts in the direction of flow, the vibration excitation element is set in rotation around the sonotrode.
- Lithotripsy device on an attachable holder housing, wherein the attachable holder housing surrounds the vibration excitation element, a proximal end of the sonotrode and / or the ultrasonic vibration exciter.
- the surrounding mounting housing makes it easier to clean the lithotripsy device and prevents injury to the rotating vibration excitation element.
- the attachable mounting housing can form part of the hand-held device and, like the sonotrode, can also only partially surround the ultrasonic vibration exciter.
- the clip-on holder housing can have plastic as the material, for example.
- the attachable mounting housing has a stop on the proximal side and/or a stop on the distal side for limiting a movement path of the vibration excitation element along the longitudinal center axis of the sonotrode and/or a supply opening and a discharge opening for the compressed gas flow.
- the holder housing can also limit a movement of the vibration excitation element in the transverse direction transverse to the longitudinal center axis of the sonotrode and/or all other spatial directions in between due to its shape and/or specifically arranged components.
- a stop on the proximal side and/or a stop on the distal side can be formed, for example, due to a shape on the inner surface of the attachable mounting housing and/or due to an inner edge.
- the movement distance of the vibration excitation element along the longitudinal center axis can be set and/or shortened in a defined manner.
- the spacer element can preferably be exchanged and different spacer elements with different lengths and/or dimensions can be used between the stop on the proximal side and the vibration-exciting element and/or between the vibration-exciting element and the stop on the distal side.
- the spacer element can be, for example, an elongate body and/or a spring. Especially when arranged on the distal side, the spacer element can also be designed as an impact mass, which transmits a lateral impulse impact of the vibration excitation element and thus transmits it in the axial direction in addition to the direct effect on the sonotrode.
- the object is achieved by a lithotripsy system for breaking up bodily stones, the lithotripsy system having a lithotripsy device as described above, a plurality of vibration excitation elements with a respective imbalance and/or a plurality of sonotrodes.
- a lithotripsy system is provided with which the user can quickly and easily by replacing a vibration excitation element with another vibration excitation element and / or before used sonotrode can adapt the lithotripsy device to the respective requirements of the fragmentation with another sonotrode and can achieve the optimal fragmentation performance in each case.
- the object is achieved by a retrofit kit for retrofitting an existing lithotripsy device, the existing lithotripsy device having a sonotrode and an ultrasonic vibration exciter, and the retrofit kit having at least one vibration excitation element with an imbalance and with a through opening for sliding on the existing sonotrode, a drive device for causing the vibration excitation element to rotate and/or an attachable mounting housing for surrounding the vibration excitation element, a proximal end of the sonotrode and/or the ultrasonic vibration exciter such that a previously described lithotripsy device can be formed.
- the retrofit kit can also be used to retrofit sonotrodes and/or lithotripsy devices that are already on the market to specifically stimulate a second oscillation of the sonotrode.
- a drive device for the separate and targeted drive of the vibration-exciting element with the imbalance can also be retrofitted here.
- a nozzle for supplying compressed air can be attached to the hand-held device and/or to the attachable mounting housing.
- the object is achieved by a method for operating a lithotripsy device, wherein the lithotripsy device has an ultrasonic vibration exciter, a sonotrode with an outer diameter, a vibration excitation element with an imbalance and with a through opening, and a drive device for driving a rotation of the vibration excitation element has, wherein the vibration excitation element is arranged with the through opening around the outer diameter of the sonotrode and the through opening of the vibration excitation element has a larger diameter than the outer diameter of the sonotrode, so that the vibration excitation element is freely movable, with the following steps:
- the user can use the method very easily and independently of the ultrasonic vibration of the sonotrode by driving the rotation of the vibration excitation element around the sonotrode, impress a second vibration, in particular a shock wave vibration.
- a second vibration in particular a shock wave vibration.
- Lithotripsy device relate and the method for operating a lithotripsy device has no treatment step and thus does not constitute a treatment method.
- Figure 1 is a highly schematic representation of a
- Figure 2 is a three-dimensional representation of a
- Figure 3 is a three-dimensional representation of the
- Figure 4 is a schematic representation of the
- Figure 5 is a three-dimensional enlarged
- Figure 6 is a schematic representation of
- a lithotripsy device 101 has an ultrasonic transducer 103 on the proximal side for generating an ultrasonic vibration.
- a tapering horn 105 is arranged on the distal side of the ultrasonic transducer 103 .
- a sonotrode 107 is screwed into the horn 105 at its proximal end 109 .
- An opposite distal end 111 of the sonotrode is used to shatter body stones.
- an unbalanced mass 113 is pushed onto the sonotrode 107 by means of a central opening 114 and surrounds the sonotrode 107.
- the unbalanced mass 113 is disc-shaped and has two overweights 115, one overweight 115 being arranged on the proximal side and the other overweight 115 being arranged on the distal side, but not rotationally symmetrically on the unbalanced mass 113.
- a compressed air nozzle 127 for driving a rotation of the unbalanced mass 113 about an axis of rotation 117 is arranged below the unbalanced mass 113, the axis of rotation 117 coinciding with a longitudinal central axis of the sonotrode 107 and a longitudinal central axis of the lithotripsy device 101.
- the compressed air nozzle 127 is connected by means of a hose, not shown in FIG. 1, to a central compressed air house supply, not shown.
- the compressed air nozzle 127 and the hose are held on the hand-held housing (not shown in FIG. 1) of the lithotripsy device 101.
- the sonotrode 107 is continuously excited by means of the ultrasonic transducer 103 with an ultrasonic vibration. Since the unbalanced mass 113 is arranged around the sonotrode 107, this ultrasonic vibration also acts on the unbalanced mass 113, but only leads to one slight back and forth movement along the axis of rotation 117. Compressed air is applied in a targeted manner to the unbalanced mass 113 in the area of its lateral surface by means of the compressed air nozzle 127, as a result of which the unbalanced mass 113 rotates with its inner opening 114 about the sonotrode 107 and the axis of rotation 117.
- the unbalanced mass 113 tumbles, starting from an initial position 121 when not driven by the compressed air nozzle 127, between a distal oscillation position 123 and a proximal oscillation position 125 in the rotating state.
- the unbalanced mass 113 is made of stainless steel and hits the sonotrode 107 alternately with its distal edge around the opening 114 and its proximal edge around the opening 114 when it tumbles, whereby this impact excitation causes the sonotrode 107 to vibrate a second time is stimulated.
- the continuous, constant ultrasonic vibration stimulated by the ultrasonic transducer 103 and the intermittent shock vibration due to the shock excitation by the unbalanced mass 113 with the two overweights 115 can be optimally used in a dual mechanism of action to smash body stones by means of the distal end 111 of the sonotrode 107.
- the sonotrode 107 is functionally, temporally and locally independent of an excitation of an ultrasonic vibration by means of the ultrasonic transducer 103 by using a dynamic Imbalance of the unbalanced mass 113 with a hard shock excitation can also be excited with a shock vibration.
- a lithotripsy device 201 has an ultrasound transducer 203 and a cap 206, with a hand-held device 231 with an attachment sleeve 233 being arranged on the outside between the ultrasound transducer 203 and the cap 206, the attachment sleeve 233 is attached to the ultrasonic transducer 203 by means of a lock 235 .
- a sonotrode 207 is largely exposed to its distal end 211 and is guided internally only through the cap 206 to its proximal end 209 within the handpiece 231 (FIG. 4).
- an unbalance disk 213 In front of the proximal end 209 of the sonotrode 207 there is an unbalance disk 213 with a plurality of equally spaced grooves 216 along its lateral surface 218 . A central opening 214 in the unbalanced disk 213 surrounds the sonotrode 207. An overweight 215 is arranged on a distal side and a proximal side of the unbalanced disk 213 in each case. Between the distal side of the unbalance disk 213 and the proximal inside of the
- Slip-on sleeve 233 is a spacer sleeve 237 is arranged.
- the sonotrode 207 in turn has a smaller outer diameter 208 than the central opening 214 of the unbalanced disk 213, so that the unbalanced disk 213 can move freely around the sonotrode 207 within the slip-on sleeve 233.
- the proximal end 209 of the sonotrode 207 is mounted on the distal end of the horn 205 .
- the ultrasonic transducer 203 has a plurality of piezo elements 245 and a counter bearing 247.
- the push-on sleeve 233 has a supply opening 241 and a discharge opening 243 for compressed air.
- a nozzle not shown in Figures 2 to 5, directs a stream of compressed air into the supply opening 241 onto the respective groove 216 for driving the unbalance disk 213.
- the piezoelectric elements 245 are subjected to a voltage from an ultrasonic generator (not shown) (FIG. 6). Due to the resulting deformation of the piezo elements 245, which are clamped between the proximal-side counter bearing 247 and the distal-side horn 205, an ultrasonic vibration is induced, as a result of which a first vibration of the sonotrode 207 is excited 303 .
- the unbalanced disk 213 is driven 305 to rotate about the sonotrode 207 by using the nozzle (not shown) to direct a stream of compressed air into the groove 216 of the rotating unbalanced disk 213 in the area of the supply opening 241, causing the unbalanced disk 213 to rotate at a continuous speed rotates. Due to the configuration of the imbalance disk 213 with the overweights 215, a dynamic imbalance of the rotating unbalance disk 213 stimulates 307 a second oscillation of the sonotrode 207.
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021131669.3A DE102021131669A1 (de) | 2021-12-01 | 2021-12-01 | Lithotripsievorrichtung zum Zertrümmern von Körpersteinen, Lithotripsiesystem, Nachrüstsatz zum Nachrüsten einer bestehenden Lithotripsievorrichtung und Verfahren zum Betreiben einer Lithotripsievorrichtung |
| PCT/EP2022/083659 WO2023099468A1 (de) | 2021-12-01 | 2022-11-29 | Lithotripsievorrichtung zum zertrümmern von körpersteinen, lithotripsiesystem, nachrüstsatz zum nachrüsten einer bestehenden lithotripsievorrichtung und verfahren zum betreiben einer lithotripsievorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4422524A1 true EP4422524A1 (de) | 2024-09-04 |
Family
ID=84519755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22823027.2A Pending EP4422524A1 (de) | 2021-12-01 | 2022-11-29 | Lithotripsievorrichtung zum zertrümmern von körpersteinen, lithotripsiesystem, nachrüstsatz zum nachrüsten einer bestehenden lithotripsievorrichtung und verfahren zum betreiben einer lithotripsievorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250099123A1 (de) |
| EP (1) | EP4422524A1 (de) |
| DE (1) | DE102021131669A1 (de) |
| WO (1) | WO2023099468A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024119706A (ja) * | 2023-02-22 | 2024-09-03 | 計芳 鈴木 | 歯科用ハンドピース |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19510920A1 (de) | 1995-03-24 | 1996-09-26 | Walz Elektronik Gmbh | Vorrichtung zum Zertrümmern von Konkrementen |
| DE10029580C1 (de) * | 2000-06-15 | 2002-01-10 | Ferton Holding Sa | Vorrichtung zum Entfernen von Körpersteinen mit einem intrakorporalen Lithotripter |
| US9421023B2 (en) | 2013-06-12 | 2016-08-23 | Cybersonics, Inc. | Ultrasonic transducer with shock pulsing masses |
| DE102020134602B4 (de) | 2020-12-22 | 2023-11-23 | Karl Storz Se & Co. Kg | Lithotripsievorrichtung, Lithotripsiesystem und Verfahren zum Betreiben einer Lithotripsievorrichtung |
-
2021
- 2021-12-01 DE DE102021131669.3A patent/DE102021131669A1/de active Pending
-
2022
- 2022-11-29 EP EP22823027.2A patent/EP4422524A1/de active Pending
- 2022-11-29 US US18/710,681 patent/US20250099123A1/en active Pending
- 2022-11-29 WO PCT/EP2022/083659 patent/WO2023099468A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023099468A1 (de) | 2023-06-08 |
| US20250099123A1 (en) | 2025-03-27 |
| DE102021131669A1 (de) | 2023-06-01 |
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