WO1993011711A1 - Shielded tip catheter - Google Patents
Shielded tip catheter Download PDFInfo
- Publication number
- WO1993011711A1 WO1993011711A1 PCT/US1992/010784 US9210784W WO9311711A1 WO 1993011711 A1 WO1993011711 A1 WO 1993011711A1 US 9210784 W US9210784 W US 9210784W WO 9311711 A1 WO9311711 A1 WO 9311711A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catheter
- housing
- inches
- electrodes
- piston
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
- A61B18/26—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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 the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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
- A61B17/22022—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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 using electric discharge
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B2017/320004—Surgical cutting instruments abrasive
- A61B2017/320008—Scrapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B2017/922—Devices for impaction, impact element
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B2017/922—Devices for impaction, impact element
- A61B2017/927—Returning means
- A61B2017/928—Returning means a spring
Definitions
- Calciferous and similar deposits occur in body fluid passages of various types, including kidney stones, gall stones, and arterial plaque.
- Surgery or radiation typically has been used for removing or destroying such deposits.
- radiation is directed onto a light-receiving surface of a heat- generating element. The element is then placed in contact with the target deposit, melting it.
- This approach has several drawbacks which include, for example, thermal damage to surrounding tissue, formation of char and debris from advanced fibrous and calcified plaques, and adhesion of the hot element to the tissue thereby rupturing it when the element is removed.
- direct lasertripsy laser radiation is applied directly to the target deposit to ablate it or produce shock waves that induce fragmentation.
- Direct lasertripsy also has several disadvantages. For example, laser energy often damages healthy tissue surrounding the target deposit by direct absorption or . by acting as a general heat sink for the high temperature plasma. Some deposits only weakly absorb radiation which requires the use of higher levels of radiation and consequent tissue damage.
- Schmidt-Kloiber et* al. in U.S. Patent 3,785,382 describe a lithotripter which utilizes a driving mechanism based on a water-filled chamber in which a hydraulic wave is induced by electrodes and transmitted through a membrane to the lithotripter wire which is threaded into the body.
- the design of this device requires that the mechanical energy resulting from the hydraulic wave be transmitted over the length of the lithotripter wire, so that if the wire takes one or more turns in a convoluted body passage, much of the energy could be transmitted to healthy tissue before it reaches the stone.
- the present invention relates to a catheter for use with a pulsed energy source for selectively removing hard or soft deposits in body passages.
- the catheter is equipped with a tip structure which contains an impact element for fracturing hard deposits, such as kidney stones, or cutting or scraping implements for removing soft deposits, such as arterial plaque.
- the catheter comprises an elongate member terminating in a tip structure which contains an impact element and means for operating it.
- the tip structure in this embodiment contains a housing defining a distal end which encloses a spring stop and an impervious shield region surrounding a pair of electrodes.
- the electrodes comprise the terminal end of two insulated wires which run from a power source " through the length of the catheter, and are spaced apart to form a spark gap.
- the distal end of the housing further contains the impact element, which is preferably a piston-shaped probe having an impact end, a driving surface and a shoulder region.
- the impact element is adapted for axial reciprocating movement in which pressure on the driving surface causes the probe to move forward such that the impact end extends beyond the housing and collides with the target deposit.
- the forward movement of the probe is limited by the shoulders, which are prevented by the spring stop from progressing beyond a certain point.
- a spring disposed within the housing between the shoulder and the spring stop returns the impact element to its original position.
- a scraping implement is used in lieu of the impact element.
- the scraping implement preferably has a knife edge which is aligned with the distal end of the housing, a driving surface for propelling the knife edge beyond the housing and shoulders for preventing the implement from leaving the housing.
- the scraping implement works like the impact element in that it is capable of axial reciprocating motion which allows it to be used to scrape or cut away arterial plaque, for example.
- a blade can be used as a cutting implement.
- the cutting implement has blades which can be used to cut hard or soft deposits in body passages, a driving surface and shoulders for preventing the implement from leaving the housing.
- the cutting implement is capable of axial reciprocating motion.
- the impact element can be a wedge-shaped tip.
- the wedge is used like the impact element to strike a deposit in a body passage with repeated impacts to fragment or break apart the deposit.
- a flexible catheter terminating in the tip structure is inserted through a body passage until the tip structure is adjacent the deposit of interest.
- the other end of the catheter is attached to an energy source.
- the energy source provides a pulse of energy which is transmitted through the conduits in the catheter to the tip structure. Fluid is admitted into the housing through the catheter or through ports in the housing.
- the pulse of energy vaporizes the fluid and causes the impact or cutting element to undergo a pulse like movement as the vapor expands against the driving surface, thereby imparting a high-velocity impulse to the target deposit.
- This motion can be repeated by applying a series of energy pulses to the electrodes, causing repeated vaporization of fluid and driving the impact or cutting element to repeated impacts with the deposit.
- a compressable spring causes the element to return to its original position after each pulse.
- the energy source can be a pulsed laser which is delivered through an optical fiber passing through the catheter to terminate adjacent to the driving surface, or can be a pulsed voltage source which delivers a spark through the pair of insulated conductors to electrodes within the housing.
- the present catheter has several advantages. It has a narrower diameter than currently available catheters, which allows it to be inserted into smaller passageways.
- the housing encloses all of the cutting or impact implements and the spark or laser, which increases patient safety and protects healthy tissue from direct laser radiation or thermal radiation from the vapor expansion which forms against the inside surface of the housing.
- Figure l is a schematic illustration of one embodiment of the invention showing a power source and a catheter with a shielded tip.
- Figure 2 is a schematic exploded cross-sectional view of the tip structure, which is the bracketed portion shown in Figure l.
- Figure 3 is a schematic exploded cross-sectional view of the tip structure.
- Figure 4 is a schematic cross-sectional view of the tip structure containing (A) a scraping implement, (B) a cutting implement, or (C) a wedge driving implement.
- the present invention is directed to an improved catheter for use in lasertripsy or lithotripsy.
- the present device will be described herein with particular reference to impact lithotripsy, however, the general principles apply to other procedures.
- FIG. 1 shows a flexible catheter 10 terminating in a tip structure 12.
- the catheter 10 generally comprises a commercially available extruded catheter which can have an outer diameter of from about 1 mm to about 2 mm, preferably about 5 french (1.6 mm) .
- the tip 12 is typically fabricated from stainless steel or other metal.
- the catheter is adapted for connection to a power source 14, which provides an energy pulse which is transmitted to the tip structure through conduits 24.
- the power source 14 can be a laser system or a spark generator.
- Laser systems which are useful for this purpose include, for example, tunable dye lasers.
- the laser is operated in the mode of producing repeated pulses of approximately 1 microsecond duration and approximately 50 millijoules of energy.
- Other pulsed laser systems which are capable of creating a plasma and are compatible with optical fiber transmission would also be acceptable energy sources. These include, for example, solid state laser systems such as Alexandrite.
- Spark generators which can be used include, for example, a Wolfe 2137.50 or Northgate Research SD1.
- the spark generator preferably produces repeated output pulses of up to several microseconds, at several KV " and up to about 1 KA current.
- the tip structure 12 comprises a housing 16 having a distal end 20, and an impervious shield region 22.
- the distal end 20 defines a spring stop 18 in the interior of the housing.
- the housing 16 surrounds a pair of electrodes 28 which are powered through insulat * ed wires 24.
- a piston shaped impact element 30 is disposed within the housing 16.
- the piston comprises an impact end 36, a driving surface 32 and shoulders 34.
- the piston 30 is adapted for axially reciprocating movement within the housing.
- Figure 2B shows the impact element 30 in its extended position.
- spring 38 is compressed between spring stop 18 and shoulder 34 when the piston element is extended.
- the tip structure 12 is attached to catheter 10, preferably by mating threaded areas 46.
- catheter 10 has a tip structure 12 releasably attached to one end, preferably by screwing together threaded areas 46.
- Insulated wires 24 pass centrally through the catheter 10 terminating at a point adjacent the driving surface 32 of piston 30.
- the distance between the end of electrodes 28 and the driving surface 32 is distance Dl.
- Distance Dl represents an optimum power distance, which is important to the proper operation of the device. If the distance Dl is too close, the spark could short to the piston 30 and fail to provide the vaporization energy needed to drive the piston.
- the electrical spark emitted from the electrodes would jump to the piston 30 rather than and be conducted and dissipated along piston 30 rather than providing the energy of vaporization needed to vaporize the fluid to drive the piston forward. If the distance Dl is too far, the energy transfer from the vaporization to the piston is less effective.
- Distance Dl can be from about 0.030 inches to 0.080 inches. The preferred distance Dl is about 0.040 inches ⁇ 0.010 inches.
- the insulated wires 24 terminate in electrodes 28 which define a spark gap having a distance D2.
- the spark gap distance D2 is " selected to provide, in response to energization from a spark generator, a vaporization of the fluid within the housing 16 generating a pulse motion of the piston 30.
- Distance D2 can be from about 0.010 to about 0.030 inches.
- the preferred spark gap distance D2 is about 0.015 inches to about 0.030 inches.
- Spring means 38 is preferably a compression spring.
- a single spring which encompasses or surrounds piston 30 can be used, or a plurality of springs located between the piston 30 and the interior wall of housing 16.
- Housing 16 is preferably fabricated from a high tensile strength metal, such as stainless steel, titanium, or nickel-based alloys, such as InconelTM.
- the piston 30 also preferably is fabricated from a metal, such as stainless steel, however any hard impact resistant material can be used.
- Piston 30 may have a central lumen 56 and ports 58 if desired, to permit the passage of fluid through the piston.
- Ports 44 preferably are included near the distal end 20 of housing 16 to permit the expulsion of excess fluid ground the spring 38 during compression by the tip.
- electrodes 28 are chamfered at an acute angle as shown in Figures 2 and 3.
- Chamfering the electrodes provides an increased spark gap (distance D2) for more spark energy without increasing the diameter of the wires. This allows distance D2 to be varied without changing distance Dl, and permits narrower conduits, and consequently a narrower gauge catheter, to be used. Narrower catheter diameter, in turn, allows the catheter to be used in smaller body passages.
- the conduits 24 can be insulated wires, where the power source is a spark generator, or can be optical fibers, where the power source is a laser.
- the catheter is used with a spark generator, and the conduits 24 comprise insulated wires.
- Bifilar magnet wires which have been dip coated with a polyimide or other polymer to form an insulating coating are useful for this purpose, because they have a narrower diameter than wound wire.
- the wires are run through the length of the catheter to their termination point in the tip structure as described above.
- the wires are surrounded by a support tube 26 ( Figures 2 and 3) at the distal end of the catheter and which terminates in the tip structure as shown in Figures 2 and 3.
- Support tube 26 serves several functions.
- the space between the outside wall of support tube 26 and the inside wall of the catheter 10 provides a passage 40 through which saline or other fluid can be introduced into the tip structure.
- Support tube 26 also provides additional stiffness to catheter 10.
- Support tube 26 is preferably glued and/or pinned to the catheter in one or more places • to immobilize it to the catheter and prevent its movement within the catheter.
- the present device also preferably includes a shock- absorbing resilient material 48 (Figure 3) disposed between the catheter 10 and the piston 30.
- This resilient material 48 absorbs vibration created by the return of the piston to its' original position and prevents such vibration from being transmitted along the catheter.
- a nylon bushing is particularly useful for this purpose, however, other resilient, shock-absorbing materials can be used.
- the shock-absorbing material 48 is preferably disposed adjacent a stop member 50 which member is positioned to prevent the rearward travel of piston 30 beyond distance Dl from the electrodes 28.
- Figures 4A, 4B and 4C illustrate further versions of the embodiments of Figures 1, 2 and 3.
- Figure 4A shows a scraping implement 52 in lieu of the piston 30.
- Figure 4B illustrates the present catheter and tip structure equipped with a cutting blade 54 in lieu of the piston 30.
- Figure 4C illustrates a driving wedge or splitting implement 56.
- a catheter 10 according to the present invention is inserted through a body passage such as the urethra, for kidney stone fracturing, the biliary duct for gall stone fracturing or an artery for arterial plaque break-up.
- the tip 12 can be guided by fluoroscopy or an X-ray source and viewing display which permit the tip structure to be guided to a position adjacent a deposit to be treated.
- Fluid is provided to the tip structure through passage 40, or may be admitted from the surrounding environment through ports 44.
- energy is applied from the power source.
- the power source is a laser
- a pulsed laser beam is transmitted through conduit 24, which is an optical fiber, to the tip structure, where it causes repeated vaporizations of the fluid.
- a spark generator is used as the power source, a series of sparks from electrodes 28 causes repeated vaporizations of fluid within shielded region 22 of housing 16.
- the vaporizations form cavitation bubbles which expand and cause pressure to be applied to driving surface 32. This pressure causes the piston 30 to move forward, and impact end 16 to project beyond distal end 20 of the housing, and contact the target deposit. This motion causes compression of spring means 38.
- the piston element 30 is prevented from leaving housing 16 by the shoulders 34, spring 38 and spring stops 18.
- the spring 38 causes the piston to return to its original position.
- the design of the present catheter permits repeated impacts to be made against the deposit.
- the narrower diameter catheter means that the catheter is minimally invasive, and can be used in smaller body passages.
- the impact element can be replaced by scraping, cutting or splitting implements or can be adapted for other tools designed for microsurgery.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Electromagnetism (AREA)
- Medical Informatics (AREA)
- Otolaryngology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Laser Surgery Devices (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93901307A EP0617590A4 (en) | 1991-12-16 | 1992-12-16 | CATHETER WITH PROTECTED TIP. |
JP5511118A JPH08501945A (ja) | 1991-12-16 | 1992-12-16 | 先端部が遮へいされたカテーテル |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80852791A | 1991-12-16 | 1991-12-16 | |
US808,527 | 1991-12-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993011711A1 true WO1993011711A1 (en) | 1993-06-24 |
Family
ID=25199038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1992/010784 WO1993011711A1 (en) | 1991-12-16 | 1992-12-16 | Shielded tip catheter |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0617590A4 (he) |
JP (1) | JPH08501945A (he) |
AU (1) | AU3278693A (he) |
EG (1) | EG19795A (he) |
IL (1) | IL104028A (he) |
MX (1) | MX9207240A (he) |
WO (1) | WO1993011711A1 (he) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997039691A1 (en) * | 1996-04-24 | 1997-10-30 | The Regents Of The University Of California | Opto-acoustic transducer for medical applications |
WO2005006994A1 (de) | 2003-07-11 | 2005-01-27 | Karl Storz Gmbh & Co. Kg | Vorrichtung zum fragmentieren von substanzen |
US10342570B2 (en) | 2014-02-03 | 2019-07-09 | Medinol Ltd. | Device for traversing vessel occlusions and method of use |
US10426923B2 (en) | 2014-02-03 | 2019-10-01 | Medinol Ltd. | Catheter tip assembled with a spring |
US10850065B2 (en) | 2010-02-09 | 2020-12-01 | Medinol Ltd. | Catheter tip assembled with a spring |
EP3838192A1 (de) * | 2019-12-16 | 2021-06-23 | Biotronik Ag | Kathetereinrichtung mit elektrischer spule |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2533840B1 (en) * | 2010-02-09 | 2019-04-10 | Medinol Ltd. | Device for traversing vessel occlusions |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3785382A (en) * | 1971-05-14 | 1974-01-15 | Wolf Gmbh Richard | Device for destroying stones in the bladder, in the ureter, in the kidneys and the like |
US3823717A (en) * | 1972-04-22 | 1974-07-16 | R Pohlman | Apparatus for disintegrating concretions in body cavities of living organisms by means of an ultrasonic probe |
US4548207A (en) * | 1982-11-17 | 1985-10-22 | Mentor O & O, Inc. | Disposable coagulator |
US4605003A (en) * | 1984-07-03 | 1986-08-12 | Agency Of Industrial Science & Technology | Lithotriptor |
US4624253A (en) * | 1985-01-18 | 1986-11-25 | Becton, Dickinson And Company | Lancet |
US4686980A (en) * | 1986-04-17 | 1987-08-18 | Alcon Laboratories, Inc. | Disposable bipolar instrument |
US4983877A (en) * | 1988-04-12 | 1991-01-08 | Ryohei Kashiwara | Ignition plug for use in internal combustion engines to cause instantaneous combustion |
WO1991010403A1 (en) * | 1990-01-09 | 1991-07-25 | Candela Laser Corporation | Method and apparatus for fragmentation of hard substances |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK0460069T3 (da) * | 1989-02-22 | 1996-03-18 | Gen Hospital Corp | Akustisk stødbølgeudsendende kateter med endekappe |
-
1992
- 1992-12-08 IL IL10402892A patent/IL104028A/he not_active IP Right Cessation
- 1992-12-14 MX MX9207240A patent/MX9207240A/es unknown
- 1992-12-15 EG EG77892A patent/EG19795A/xx active
- 1992-12-16 JP JP5511118A patent/JPH08501945A/ja active Pending
- 1992-12-16 WO PCT/US1992/010784 patent/WO1993011711A1/en not_active Application Discontinuation
- 1992-12-16 AU AU32786/93A patent/AU3278693A/en not_active Abandoned
- 1992-12-16 EP EP93901307A patent/EP0617590A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3785382A (en) * | 1971-05-14 | 1974-01-15 | Wolf Gmbh Richard | Device for destroying stones in the bladder, in the ureter, in the kidneys and the like |
US3823717A (en) * | 1972-04-22 | 1974-07-16 | R Pohlman | Apparatus for disintegrating concretions in body cavities of living organisms by means of an ultrasonic probe |
US4548207A (en) * | 1982-11-17 | 1985-10-22 | Mentor O & O, Inc. | Disposable coagulator |
US4605003A (en) * | 1984-07-03 | 1986-08-12 | Agency Of Industrial Science & Technology | Lithotriptor |
US4624253A (en) * | 1985-01-18 | 1986-11-25 | Becton, Dickinson And Company | Lancet |
US4686980A (en) * | 1986-04-17 | 1987-08-18 | Alcon Laboratories, Inc. | Disposable bipolar instrument |
US4983877A (en) * | 1988-04-12 | 1991-01-08 | Ryohei Kashiwara | Ignition plug for use in internal combustion engines to cause instantaneous combustion |
WO1991010403A1 (en) * | 1990-01-09 | 1991-07-25 | Candela Laser Corporation | Method and apparatus for fragmentation of hard substances |
Non-Patent Citations (1)
Title |
---|
See also references of EP0617590A4 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997039691A1 (en) * | 1996-04-24 | 1997-10-30 | The Regents Of The University Of California | Opto-acoustic transducer for medical applications |
US5944687A (en) * | 1996-04-24 | 1999-08-31 | The Regents Of The University Of California | Opto-acoustic transducer for medical applications |
US6379325B1 (en) | 1996-04-24 | 2002-04-30 | The Regents Of The University Of California | Opto-acoustic transducer for medical applications |
WO2005006994A1 (de) | 2003-07-11 | 2005-01-27 | Karl Storz Gmbh & Co. Kg | Vorrichtung zum fragmentieren von substanzen |
US8012158B2 (en) | 2003-07-11 | 2011-09-06 | Karl Storz Gmbh & Co. Kg | Device for fragmenting substances |
US10850065B2 (en) | 2010-02-09 | 2020-12-01 | Medinol Ltd. | Catheter tip assembled with a spring |
US10342570B2 (en) | 2014-02-03 | 2019-07-09 | Medinol Ltd. | Device for traversing vessel occlusions and method of use |
US10426923B2 (en) | 2014-02-03 | 2019-10-01 | Medinol Ltd. | Catheter tip assembled with a spring |
US11458284B2 (en) | 2014-02-03 | 2022-10-04 | Medinol Ltd. | Catheter tip assembled with a spring |
EP3838192A1 (de) * | 2019-12-16 | 2021-06-23 | Biotronik Ag | Kathetereinrichtung mit elektrischer spule |
Also Published As
Publication number | Publication date |
---|---|
IL104028A0 (en) | 1993-05-13 |
AU3278693A (en) | 1993-07-19 |
EP0617590A1 (en) | 1994-10-05 |
EP0617590A4 (en) | 1995-07-12 |
JPH08501945A (ja) | 1996-03-05 |
EG19795A (en) | 1996-01-31 |
IL104028A (he) | 1996-06-18 |
MX9207240A (es) | 1994-05-31 |
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