EP4419021A1 - Applikationssonde zum zertrümmern von körpersteinen für eine lithotripsievorrichtung, lithotripsievorrichtung, lithotripsiesystem und verfahren zum betreiben einer lithotripsievorrichtung - Google Patents
Applikationssonde zum zertrümmern von körpersteinen für eine lithotripsievorrichtung, lithotripsievorrichtung, lithotripsiesystem und verfahren zum betreiben einer lithotripsievorrichtungInfo
- Publication number
- EP4419021A1 EP4419021A1 EP22821443.3A EP22821443A EP4419021A1 EP 4419021 A1 EP4419021 A1 EP 4419021A1 EP 22821443 A EP22821443 A EP 22821443A EP 4419021 A1 EP4419021 A1 EP 4419021A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sonotrode
- impact body
- distal end
- lithotripsy
- impact
- 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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- 239000004575 stone Substances 0.000 claims description 62
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- 238000005553 drilling Methods 0.000 description 7
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- 238000002604 ultrasonography Methods 0.000 description 4
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000000913 Kidney Calculi Diseases 0.000 description 1
- 206010029148 Nephrolithiasis Diseases 0.000 description 1
- 208000009911 Urinary Calculi Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 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
- A61B17/22004—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 an application probe for breaking up body stones for a lithotripsy device, in particular an intracorporeal lithotripsy device, the application probe being a sonotrode with a longitudinal direction, a proximal end and a distal end and an impact body for mechanical shock wave input, wherein the impact body has a distal end and a proximal end and is arranged around the sonotrode. Furthermore, the invention relates to a lithotripsy device, a lithotripsy system and a method for 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 large to be passed naturally and are causing discomfort, they must be crushed using a lithotripter so that the crushed stones can be removed by natural excretion and/or by using a suction-irrigation pump.
- a common technique for breaking up large stones is percutaneous nephrolithotomy (PCNL), in which the stones first crushed and removed using suction-rinse pumps or a stone basket.
- PCNL percutaneous nephrolithotomy
- Such body stones are often not built up homogeneously, but have different components, layers and/or strengths.
- ultrasound-based lithotripters are used in combination with mechanical shock excitation.
- both the ultrasonic vibration and the impact vibration are usually transmitted to the head of the sonotrode, forwarded from the sonotrode to its distal end, where the tip of the sonotrode acts directly on a stone in the body. This allows a high level of removal of both hard and soft stones, but there is a lower amplitude at the distal tip of the sonotrode.
- DE 102018 101 215 A1 describes a device for breaking up bodily stones, which has a first drive unit for periodic deflection of the sonotrode and a second drive unit for pulse-shaped deflection of the sonotrode, the second drive device having a projectile accelerated by means of electromagnets, which hits a impact body, for example an anvil, which transmits the impact impulse to the sonotrode head.
- the disadvantage is that two drive devices are required and the device therefore requires a larger installation space.
- 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 a first impact-pulsating mass on the distal side of the waveguide fitting, followed by a compression spring and a second impact-pulsating mass coaxially around the ultrasonic waveguide are arranged.
- 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 mechanical impact is transferred from the impact surface to the proximal section of the sonotrode and must be passed on by it.
- this impact excitation system includes several components around the sonotrode, which can easily be lost during cleaning or disassembly, for example.
- systems are known in which two coaxial probes arranged on the distal side are used, one of which transmits the ultrasonic vibration and the other transmits the mechanical impact excitation.
- the disadvantage here is that the respective effective area is limited and both coaxial probes can only be used together, so that the respective mechanism of action and the stone fragmentation cannot be used and adjusted specifically depending on the composition and/or hardness of the stone.
- a sonotrode is also known, which has an impact body at its distal end, which reciprocates at irregular intervals in the axial direction due to ultrasonic excitation.
- the disadvantage here is that only the impact body and thus its stochastic movement acts on the stone, while the ultrasonic vibration does not act directly on the stone, which means that stone removal is relatively small.
- the object of the invention is to improve the prior art.
- the object is achieved by an application probe for breaking up bodily stones for a lithotripsy device, in particular an intracorporeal lithotripsy device, the application probe having a sonotrode with a longitudinal direction, a proximal end and a distal end and an impact body for mechanical shock wave input, the impact body having a has a distal end and a proximal end and is arranged around the sonotrode, and the impact body is arranged surrounding the sonotrode on a distal end section of the sonotrode and is movably mounted in the longitudinal direction of the sonotrode, so that if the sonotrode and the impact body are excited to vibrate, a body stone to be shattered with the distal end of the Sonotrode and / or the distal end of
- an application probe in which both the ultrasonic vibration at the sonotrode tip directly and the chaotically moving impact body can act on the stone by means of a movably mounted impact body.
- an effective simultaneous and/or alternating action of ultrasonic vibration and the direct mechanical impact of the impact body on the bodily stone can be implemented.
- the impact body is arranged and designed on the distal end section of the sonotrode in such a way that, due to its movable mounting, the impact body can be moved both in the distal direction and in the proximal direction along the longitudinal direction of the sonotrode and, as a result, in the event of vibration excitation, it moves in the distal direction via the move out the distal end of the sonotrode, causing stone fragmentation, and conversely move back in the proximal direction, thereby releasing the distal end of the sonotrode. Due to the combined simultaneous and/or alternating effect of the mechanical impact of the impact body and the ultrasonic vibration of the sonotrode, stone removal is significantly improved both with hard and soft stones.
- An essential idea of the invention is based on arranging the impact body movably mounted directly on the distal end section around the sonotrode, so that a stone to be smashed both with the distal end of the The impact body and the distal end of the sonotrode can be contacted, with only a single vibration excitation source being required both for exciting the ultrasonic vibration of the sonotrode and for exciting the movement of the impact body in the longitudinal direction of the sonotrode.
- a “lithotripsy device” also called “lithotripter” is in particular a device for breaking up body stones using vibration and/or shock waves.
- a lithotripsy device is understood to mean, 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 further components, such as a control and/or supply unit, or these are assigned to the lithotripsy device.
- "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 “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 arranged, connected and/or automatically guided at a distal end of a robot arm.
- the carrier unit has a housing.
- An "application probe” is in particular a rod, tube and/or hose-shaped instrument.
- the application probe is inserted into an organ, body cavity and/or tissue in order to break up the stone.
- the application probe has, in particular, a sonotrode and an impact body, with a continuous vibration being able to be transmitted by means of the sonotrode and a mechanical impact being able to be transmitted directly to a stone to be shattered by means of the impact body.
- a "sonotrode” is, in particular, a component which, through the action and/or initiation of mechanical vibrations, itself vibrates and/or resonant vibration is displaced.
- the sonotrode is excited to oscillate, in particular longitudinally, in particular by means of the oscillation excitation device, for example with an ultrasonic oscillation exciter.
- the sonotrode is designed in particular as a waveguide for the vibration waves generated by the vibration excitation device.
- the sonotrode is connected to the ultrasonic vibration exciter, the ultrasonic transducer and/or the horn. For example, 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 directly and/or indirectly impinging on and/or contacting bodily stones.
- the sonotrode is in particular shaped in such a way that it optimally introduces the vibration 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.
- 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 in particular a diameter in a range from 0.5 mm to 4.5 mm, in particular from 0.8 mm to 3.8 mm.
- the "longitudinal direction” is in particular the direction of the longest extension of the sonotrode.
- the longitudinal direction is in particular the direction along the longitudinal center axis of the sonotrode.
- “Distal side” and “distal” are understood to mean an arrangement close to the body and thus remote from the user and/or a corresponding end.
- proximal or “proximal” is understood to mean an arrangement close to the user and thus at a distance from the body or a corresponding end.
- a “distal end section” is understood to mean a section of the sonotrode in front of its distal end and thus in front of its sonotrode tip.
- a “vibration excitation device” is, in particular, any device that causes the sonotrode to be excited to vibrate.
- the vibration excitation device excites a regular and/or constant vibration.
- a laser or a pneumatic energy source can be used for this purpose, for example.
- the vibration excitation device preferably has an ultrasonic vibration exciter.
- 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 an AC voltage supplied with a specific frequency into a converts 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 can taper in a transmission direction and directly or indirectly transmit the ultrasonic waves to a sonotrode head.
- the horn can also be used to attach the sonotrode.
- an “impact body” (also called “rattle mass”) is understood to mean, in particular, a body, a component and/or an assembly whose distal end can be impacted directly on a stone to be smashed.
- the impact body and/or its main part is arranged in particular partially or completely around the sonotrode.
- the impact body can be designed as a hollow body, such as a tube.
- the impact body has a slightly larger inside diameter than the outside diameter of the sonotrode.
- the impact body can have a specially shaped connecting part or a bearing mount.
- the impact body has a lower mass than the sonotrode.
- the impact body has in particular a mass which oscillates during operation of the lithotripsy device and/or moves back and forth chaotically along the longitudinal direction of the sonotrode.
- a “mechanical shock wave input” is understood to mean, in particular, a direct impact of the distal end of the impact body on a stone to be shattered.
- the mechanical shock wave input is in particular a discontinuous, intermittent, chaotic and/or oscillating shock wave and/or shock wave.
- the applied mechanical shock wave has in particular a greater intensity and/or amplitude and/or a wavelength that changes over time compared to the vibration excitation by means of the vibration excitation device.
- the impact body is mounted on the distal end section of the sonotrode by means of a guide bearing, the guide bearing connecting the impact body and the sonotrode.
- the guide bearing ensures both the mobility of the impact body in the distal and proximal direction along the longitudinal direction of the sonotrode and a fixed connection between the impact body and the sonotrode during operation.
- a “guide bearing” is understood to mean any type of bearing which allows the impact body to move in the direction of the longitudinal direction of the sonotrode and forms a connection between the impact body and the sonotrode.
- a guide bearing is understood in particular as an element or several elements for guiding the movement of the impact body relative to the sonotrode.
- a guide bearing is in particular a linear bearing with which the impact body can be moved along the longitudinal direction of the sonotrode.
- the guide bearing enables a translational movement.
- the guide bearing can also be designed as a linear bearing and a radial bearing and at the same time enable a linear movement and a rotational movement.
- the guide bearing has a moving part and a fixed part.
- a rotational movement of the impact body around the outer surface of the sonotrode can also be excited when vibrations are excited. Due to the rotation of the impact body around the sonotrode, when the distal end of the impact body strikes, in addition to the impact in the longitudinal direction of the sonotrode, a drilling effect is also introduced directly into the stone to be broken up. Due to the vibration excitation by means of ultrasound, the excitation of the rotational movement of the impact body is primarily chaotic. Here, the impact body can also twist, so that a torsion acts on the impact body, whereby the drilling effect is intensified and additional stone removal takes place.
- the guide bearing has a longitudinal recess with a distal stop and a proximal stop and a connecting part, the connecting part being arranged in the recess so as to be movable in the longitudinal direction, and the recess in the sonotrode and the Connecting part is arranged on the impact body or vice versa, so that if the connecting part strikes the distal stop, the distal end of the impact body is arranged over the distal end of the sonotrode and a mechanical shock can be transmitted directly to the stone to be shattered by means of the impact body, and in In the event of abutment of the connecting part against the proximal stop, the distal one The end of the sonotrode is exposed and a vibration wave can be transmitted to the stone to be smashed by means of the sonotrode.
- the recess forms the fixed part and the connecting part forms the movable part of the guide bearing.
- the recess is preferably also formed radially around the circumference of the sonotrode, so that both a linear movement and a rotational movement of the impact body is made possible.
- the length of the cutout in the longitudinal direction of the sonotrode and thus the position of the distal stop and the proximal stop determines the movement distance of the impact body in the longitudinal direction and thus how far the impact body extends with its distal end over the distal end of the sonotrode when the connecting part hits a distal stop can be moved out.
- the impact body also causes an impact and thus an excitation on the sonotrode when its connecting part strikes the distal stop and the proximal stop in its longitudinal direction, the strength of which depends on the mass of the impact body and the intensity of the excitation of the movement of the impact body.
- a “recess” is in particular an exposed space on and/or in the impact body or the sonotrode.
- a recess can be a groove, for example act as an elongate indentation in the longitudinal direction and/or radially circumferential.
- a "stop” is in particular a desired end point of the movement of the impact body on and along the sonotrode.
- the connecting part strikes against the distal-side or proximal-side stop.
- the cutout can be formed in the surface of the sonotrode, with the sonotrode having a distal housing shoulder and a proximal housing shoulder on both sides of the cutout, and the inner walls of the two housing shoulders lying on the cutout form the distal stop and the proximal stop.
- Exposed is meant that the distal end of the sonotrode is not surrounded by the impact body.
- the "connecting part” is in particular a component of the impact body or the sonotrode, which is movably accommodated in the recess and can be struck against the distal stop and the proximal stop.
- the connecting part can be specially shaped.
- the connecting part is preferably connected in one piece to the impact body or the sonotrode.
- the connecting part is flanged at its proximal end.
- the term “flared” is understood in particular to mean that the edge of the proximal end of the connecting part is bent over with a flanging machine or by hand.
- the connecting part is arranged at the proximal end of the impact body, the connecting part having a smaller inner diameter at its proximal end than an inner diameter of the impact body surrounding the sonotrode.
- the main body of the impact body which surrounds the sonotrode on the outside, has a larger inner diameter and the connecting part protrudes into the recess due to its smaller diameter.
- the connecting part has a smaller material thickness in a direction transverse to the longitudinal direction than a material thickness of the impact body surrounding the sonotrode.
- the hollow body thus has a greater wall thickness on its main part, which surrounds the sonotrode on the outside, than the wall thickness of the connecting part.
- the wall thickness of the connecting part can also be the same thickness or thicker than the wall thickness of the main part of the impact body.
- the connecting part is designed as a mechanical spring. By designing the connecting part as a spring, the connection in the recess is improved on the one hand, and the stop on the distal side and the stop on the proximal side can be used specifically for tensioning the connecting part as a spring and the repulsation can be improved on the other.
- a "spring" is in particular a component which can be elastically deformed during operation of the lithotripsy device.
- the connecting part itself is preferably designed as a spring.
- the elastic deformation of the connecting part is in particular a bending, torsion, stretching and/or compression.
- the connecting part is compressed in particular in the direction of impact upon impact and/or expands again in a direction of movement opposite to the direction of impact.
- the connecting part can in particular have a metal.
- the impact body and/or the connecting element can in particular have high-grade steel, titanium and/or amorphous metallic glass. Amorphous metallic glass and in particular bulk metallic glass are harder than their crystalline metal compounds and have high strength.
- small deformations in the single-digit percentage range are purely elastic, so that the energy absorbed is not lost as deformation energy, but is completely released again when the metallic glass springs back.
- the connecting part is preferably designed as a spring in such a way that, on the one hand, it stably guides the impact body in its movement and, on the other hand, it is elastically deformable.
- the impact body and/or the sonotrode has or have a rotational direction element for specifying a direction of rotation of the impact body.
- drilling of the distal end of the impact body in the stone to be shattered is made possible.
- the rotation direction element is formed by a groove in an outer surface of the sonotrode and a corresponding web on the inner surface of the impact body, the web being movable in the groove.
- a direction of rotation is thus specified by a form-fitting connection between the groove and the web, with the web preferably remaining movable in the groove both in the longitudinal direction of the sonotrode and in the direction of rotation.
- a "rotation direction element" is in particular an element, component or component group which defines the direction of rotation of the impact body around the sonotrode.
- a rotational direction element can also be formed, for example, by a tooth system and/or an inhibition on the proximal stop of the recess.
- At the groove can be, for example, a slit in the longitudinal direction.
- the groove and the corresponding web are circular and/or spiral in the longitudinal direction.
- the impact body and/or the sonotrode has or have a drill bit at the respective distal end.
- a "drill bit” is in particular a cylindrical drill bit at the distal end of the impact body or the sonotrode with an offset and/or serration. Thus, in particular, chipping and/or breaking up takes place in the area between the outer and inner circumference of the drill bit.
- the object is achieved by a lithotripsy device, in particular intracorporeal lithotripsy device, for breaking up body stones, the lithotripsy device having a carrier unit, a sonotrode which can be connected to the carrier unit on the distal side and has a vibration excitation device for exciting the sonotrode to vibrate, the lithotripsy device having an application probe as described above, so that the vibration excitation device can be used to excite vibration of the sonotrode and excitation of a back and forth movement of the impact body in the longitudinal direction of the sonotrode.
- a lithotripsy device in which, with a single vibration excitation device, both the vibration of the sonotrode for direct action of the sonotrode tip on a stone to be smashed and an excitation of the chaotic, oscillating back and forth movement of the impact body as a rattle mass for direct impact on the stone can be used.
- the vibration excitation device has an ultrasonic vibration exciter, so that the reciprocating movement of the impact body can be stimulated by means of the ultrasonic vibration exciter.
- An ultrasound-based lithotripsy device is thus provided in which a second drive device is not required for exciting the impact body.
- the impact body In order to make effective use of the excited and/or reflected vibration wave, when the vibration of the sonotrode is excited, the impact body is at a distance from the distal end of the sonotrode and/or from an amplitude node in a range from a quarter wavelength to less than half a wavelength an excited vibration wave arranged.
- the amplitude and/or intensity of the vibration wave at the location of the impact body is used in a targeted manner to stimulate the movement of the impact body.
- an excitation frequency of 27 kHz is used, the wavelength of this ultrasonic vibration being about 8.50 cm to 9.00 cm.
- the impact body has a length of 8.00 mm from its distal drill bit tip to its proximal end and is movably connected to the sonotrode in such a way that the impact body protrudes a maximum of 1.25 mm beyond the tip of the sonotrode on the distal side. In contrast, when the impact body is most retracted, the sonotrode tip protrudes 0.30 mm to 2.00 mm below the distal drill bit tip of the impact body on the distal side.
- An "amplitude node" is a point in the region of a standing wave or the superposition of two counter-propagating waves of equal frequency and equal amplitude caused by reflection, the displacement of which always remains at zero.
- the "wavelength" of a periodic wave is the smallest distance two points of the same phase.
- the wavelength is the distance between two maximum amplitudes.
- the object is achieved by a lithotripsy system for breaking up bodily stones, the lithotripsy system having a lithotripsy device as described above and two application probes as described above or a plurality of application probes as described above, the application probes being sonotrodes with a different outer diameter and/or or have different impact bodies.
- a lithotripsy system is provided with which the user can quickly and easily adapt the lithotripsy device to the respective requirements of the fragmentation and achieve the optimum fragmentation performance by exchanging application probes with different sonotrodes and/or different impact bodies.
- Application probes are exchanged in particular before an intervention, between an intervention and/or outside the body in which a bodily stone is to be broken up, or during a trial operation.
- the object is achieved by a method for operating a lithotripsy device, the lithotripsy device having a sonotrode with a longitudinal direction, a proximal end and a distal end and an impact body for mechanical shock wave input, the The impact body has a distal end and a proximal end and is arranged on a distal end section of the sonotrode so as to surround the sonotrode and is movably mounted in the longitudinal direction of the sonotrode, in particular by means of a guide bearing, with the following steps: - Exciting a vibration wave, in particular a longitudinal vibration, of the sonotrode by means of the vibration excitation device, - inducing a forward movement of the impact body in a distal direction by means of the excited vibration wave and - moving the distal end of the impact body over the distal end of the sonotrode in the distal direction, - inducing a backward movement of the impact body counter to the distal direction by means of the excited
- these process steps can be carried out and/or repeated in any order simultaneously or alternately. If they are carried out simultaneously, the distal end of the impact body and the distal end of the sonotrode can also be aligned in the same way and can therefore be used simultaneously for stone removal.
- the user can use the method using the vibration excitation device as the only source of excitation both a vibration wave of the sonotrode and a Use the reciprocating movement of the impactor to directly crush the stone.
- FIG. 1 shows a highly schematic three-dimensional representation of a lithotripsy system with a lithotripsy device and an application probe
- FIG. 2 shows a highly schematic sectional representation of the application probe in a longitudinal section when an impact body strikes proximally
- FIG. 1 shows a highly schematic three-dimensional representation of a lithotripsy system with a lithotripsy device and an application probe
- FIG. 2 shows a highly schematic sectional representation of the application probe in a longitudinal section when an impact body strikes proximally
- FIG. 1 shows a highly schematic three-dimensional representation of a lithotripsy system with a lithotripsy device and an application probe
- FIG. 2 shows a highly schematic sectional representation of the application probe in a longitudinal section when an impact body strikes proximally
- FIG. 1 shows a highly schematic three-dimensional representation of a lithotripsy system with a lithotripsy device and an application probe
- FIG. 2 shows a highly schematic sectional representation of the application probe in
- a lithotripsy system 100 has a lithotripsy device 101 with an application probe 131, an ultrasound generator 121 and a supply and control unit 129. Furthermore, the lithotripsy device 101 has an ultrasonic transducer 103 for generating an ultrasonic vibration and a handle 119 . A tapering horn 105 is arranged on the distal side of the ultrasonic transducer 103 .
- the application probe 131 has a sonotrode 107 and an impact body 133 .
- the sonotrode 107 is screwed into the horn 105 at its proximal end 109 .
- the impact body 133 has a distal end 135 and a proximal end 137 and surrounds a distal end section of the sonotrode 107 in front of the latter's distal end 111 in an inoperative state (see FIG. 1).
- the application probe 131 and the lithotripsy device 101 are designed as an intracorporeal lithotripter, with the distal end 111 of the sonotrode 107 and the distal end 135 of the impact body 133 being used to act directly on and smash body stones.
- the ultrasonic transducer 103 is used to excite the sonotrode 107 with a continuous ultrasonic vibration, with the ultrasonic waves being transmitted from the ultrasonic transducer 103 by means of the horn 105 to the sonotrode head at the proximal end 109 of the sonotrode 107 and being conducted further by the sonotrode 107 to the distal end.
- the ultrasonic converter 103 is electrically connected to the ultrasonic generator 121 by means of a connecting cable 123 .
- the Lithotripsy device 101 connected to two tubes 127 for media supply and / or for rinsing ( Figure 1).
- the impact body 133 has a main impact part 147 which is arranged coaxially to the longitudinal center axis 117 of the sonotrode 107 around the sonotrode 107 . Furthermore, the impact body 133 has a connecting part 145 in its proximal section, which is formed as a bent spring. The connecting part 145 has a smaller material thickness 153 than a material thickness 155 of the main impact part 147 . The connecting part 145 is accommodated in a recess 143 of the sonotrode 107 so that it can move in the direction of the longitudinal central axis 117 . The connecting part 145 and the recess 143 together form a guide bearing 141 .
- the recess 143 is formed both in the direction of the longitudinal center axis 117 of the sonotrode 107 and radially around the circumference of the sonotrode 107 .
- the sonotrode 107 has a distal housing shoulder 163 and a proximal housing shoulder 165 on both sides of the recess 145 .
- the walls on the distal housing shoulder 163 and the proximal housing shoulder 165 lying inside the recess 145 form a distal stop 149 and a proximal stop 151 for the connecting part 145 .
- the impact body 133 has a drill bit 157 at its distal end 135 .
- the sonotrode 107 has a drill bit 159 at its distal end 111 .
- this excited vibration wave causes the impact body 133 to move in a distal direction 161 (method step 305), with the connecting part 145 moving from the proximal stop 151 within the recess 143 in the distal direction 161 against the distal stop 149. This results in a movement 307 of the distal end 135 of the impact body 133 over the distal end 111 of the sonotrode 107 (see FIG. 3).
- an induction 309 of a backward movement of the impact body 133 occurs counter to the distal direction 161, as a result of which the connecting part 145 is moved from the distal stop 149 within the recess 143 against the proximal stop 151 (see the state in Figure 2), whereby the distal end 111 of the sonotrode 107 is released 311 .
- These method steps are repeated when the ultrasonic transducer 103 excites vibrations.
- the impact body 133 also rotates chaotically about the longitudinal central axis 117 of the sonotrode due to the radially circumferential formation of the recess 143.
- both the vibrational excitation of the sonotrode 107 itself and the direct drilling effect of the impact body 133 and chipping and breaking up by means of the drill bit 157 of the impact body 133 and the drill bit 159 of the sonotrode 107 are simultaneous can be used with an effective high crushing power.
- the sonotrode 107 is offset with the distal housing shoulder 163 and the proximal housing shoulder 165 and the recess 143 arranged between them.
- the impact body 133 is pushed over the sonotrode 107 and its connecting part 145 is flanged into the recess 143 between the two housing shoulders 163, 165 in such a way that the connecting part 145 and the impact body 133 can be moved in the direction of the longitudinal center axis 117 of the sonotrode 107 and can be rotated around it are.
- the range of movement in the direction of the longitudinal center axis 117 is defined by the length of the recess 143 in the direction of the longitudinal center axis 117 and the positions of the housing shoulders 163 and 165, so that when the impact body 133 is maximally deflected in the distal direction 161, it protrudes beyond the tip of the sonotrode and when it is maximally retracted in the opposite direction the sonotrode tip is exposed.
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021130795.3A DE102021130795B4 (de) | 2021-11-24 | 2021-11-24 | Applikationssonde zum Zertrümmern von Körpersteinen für eine Lithotripsievorrichtung, Lithotripsievorrichtung, Lithotripsiesystem und Verfahren zum Betreiben einer Lithotripsievorrichtung |
| PCT/EP2022/082717 WO2023094348A1 (de) | 2021-11-24 | 2022-11-22 | Applikationssonde zum zertrümmern von körpersteinen für eine lithotripsievorrichtung, lithotripsievorrichtung, lithotripsiesystem und verfahren zum betreiben einer lithotripsievorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4419021A1 true EP4419021A1 (de) | 2024-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22821443.3A Pending EP4419021A1 (de) | 2021-11-24 | 2022-11-22 | Applikationssonde zum zertrümmern von körpersteinen für eine lithotripsievorrichtung, lithotripsievorrichtung, lithotripsiesystem und verfahren zum betreiben einer lithotripsievorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4419021A1 (de) |
| DE (1) | DE102021130795B4 (de) |
| WO (1) | WO2023094348A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2015343272B2 (en) | 2014-11-03 | 2020-07-16 | Cagent Vascular, Inc. | Serration balloon |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4036570A1 (de) * | 1990-11-16 | 1992-05-21 | Osypka Peter | Katheter zur verminderung oder beseitigung von verengungen in gefaessen |
| US9421023B2 (en) | 2013-06-12 | 2016-08-23 | Cybersonics, Inc. | Ultrasonic transducer with shock pulsing masses |
| DE102018101215B4 (de) | 2018-01-19 | 2023-09-07 | Ferton Holding S.A. | Vorrichtung zur Zertrümmerung eines Körpersteins |
| DE102019111100A1 (de) * | 2019-04-30 | 2020-11-05 | Karl Storz Se & Co. Kg | Lithotripsievorrichtung und Testverfahren zum Betrieb einer Lithotripsievorrichtung |
-
2021
- 2021-11-24 DE DE102021130795.3A patent/DE102021130795B4/de active Active
-
2022
- 2022-11-22 WO PCT/EP2022/082717 patent/WO2023094348A1/de not_active Ceased
- 2022-11-22 EP EP22821443.3A patent/EP4419021A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021130795B4 (de) | 2023-12-28 |
| WO2023094348A1 (de) | 2023-06-01 |
| DE102021130795A1 (de) | 2023-05-25 |
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