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US3413976A - Arrangement for removal of concretions from urinary tract - Google Patents

Arrangement for removal of concretions from urinary tract Download PDF

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US3413976A
US3413976A US298059A US29805963A US3413976A US 3413976 A US3413976 A US 3413976A US 298059 A US298059 A US 298059A US 29805963 A US29805963 A US 29805963A US 3413976 A US3413976 A US 3413976A
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concretion
instrument
concretions
sonde
fluid
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Roze Leo Voolfovich
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GOSUDARSTVENNY ELEKTROTEKHNICHESKY ZAVOD VEF
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GOSUDARSTVENNY ELEKTROTEKHNICHESKY ZAVOD VEF
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    • 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
    • A61B17/22022—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 using electric discharge

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  • Another object of the invention is to provide means effecting an easy and substantially painless removal of concretions from the urinary tract.
  • the invention provides for the removal of concretions with their preliminary crushing being eifected by electro-hydraulic impact.
  • the main object of the invention is to provide an arrangement for the removal of concretions from the ureter and the bladder with their preliminary crushing being elfected by electro-hydraulic impacts.
  • Another objectof the invention is to provide for the crushing of concretions in the ureter emptied of urine.
  • Another object of the invention is to provide for the crushing of concretions in the urinary bladder with their preliminary fixation.
  • a further object of the invention is to provide an instrument which is simple in structural detail and which includes a sonde provided with discharge electrodes.
  • FIG. 1 is a general view partly in elevation and partly in cross-section of an arrangement for crushing the concretions in the ureter With the components thereof being in the working position.
  • FIG. 2 is a fragmentary view in cross-section of the head of the instrument, the view being on an enlarged scale.
  • FIGS. 3-5 are fragmentary cross-sectional views of the head of the instrument illustrating its position relative to a concretion in the ureter prior to crushing, at the initial stage of crushing, and at the end of crushing, respectively.
  • FIG. 6 is a view partly in elevation and partly in crosssection showing an arrangement used for crushing the concretions in the urinary bladder.
  • FIG. 7 is an elevational view of another instrument which may be used for the removal of concretions from the urinary bladder.
  • FIG. 8 is an elevational view of the instrument disclosed in FIG. 7 and showing the same at the moment of gripping a concretion prior to the crushing thereof.
  • FIGS. 9, 10 and 11 are elevational views partly in cross-section of embodiments of the invention.
  • the removal of the stones with the assistance of the present instrument is preceded by crushing of the concretion by a high voltage electric discharge in fluids with a vacuum and a cavitation force taking place in the fluid at the moment of disappearance of the discharge so that an object located in the zone of the hydraulic impact will be crushed by the vacuum and cavitation force.
  • the arrangement according to the invention includes a steep pulse generator and a flexible sonde which is adapted to be introduced into the urinary tract with the generator connected to spaced electrodes so that an electro-hydraulic impact is produced between the electrodes during the electric discharge.
  • FIGS. 1 and 2 show an instrument for crushing concretions in urethra designed on the basis of a urologic cystoscope 1 through which is passed a sonde 2 having electrodes.
  • the sonde is provided with a head 3 which serves as a negative electrode isolated by a tube 4 from positive electrode 5.
  • the electrode 5 is in the form of a long medicine needle having a boss at the end.
  • the sonde 2 is sheathed by a flexible envelope or covering 7 (FIG. 3) coated with a film of current insulating lacquer 8.
  • the needle 5 is operably connected to a syringe 9 containing fluid 10 (distilled water, etc.). Electricity is supplied from the generator through conductors 11 with one of the conductors being connected directly with the needle '5 and the other to the envelope 7.
  • fluid 10 distilled water, etc.
  • the cystoscope 1 is introduced into urinary bladder 12 through the urethra and the sonde 2 into one of ureters 13 with its head in the immediate vicinity of a concretion 14 situated in the ureter.
  • a certain amount of fluid 10 required to produce an electro-hydraulic effect is delivered into the ureter by the syringe 9.
  • the hydraulic impacts developed are noted for their brisk action which enables the concretion to be crushed into small particles and dependent upon the size and solidity of the concretion, the crushing cycle may be from several seconds to ten minutes. Hydraulic impacts of a proper dosage and direction have no harmful effects on the walls of the urethra and there is an absence of thermal action on the tissues. Moreover, a small amount of the fluid is sufiicient for crushing a concretion.
  • the same instrument can be used if it is necessary to crush a concretion in the urinary bladder 12. In this case, it is not necessary for fluid 10 to be supplied and hence the use of the syringe 9.
  • Central electrode of this instrument can be manufactured without the channel for the fluid.
  • An instrument for removal of a concretion from the urinary bladder and shown in FIGS. 7 and 8 is in the form of urological forceps 16 provided with a device for gripping and fixing a concretion 17.
  • This device includes gripping jaws 18 and 19 which are pulled by handles 20 located at the base of the instrument 16.
  • the central passage of the instrument bears on anoptical inspecting device 21 attached to a removable head 22 equipped with an ocular.
  • Plate 23 fixed to the inner side of the jaw 18 serves as a negative electrode and the end of positive electrode 24 is also located at the same place.
  • the electrode is supplied through a current conducting component 25 disposed at the side of the instrument and connected to the generator by conductors 26.
  • FIG. 7 shows the instrument in the position with its jaws set apart, optical inspecting device 21 extended and when the instrument is inserted into the urethra, the inspecting device is retracted and jaws 1 8 and 19 fold together. After the instrument head is introduced into the urinary bladder 12, the inspecting device is extended again and the jaws 18 and 19 set apart to their extreme position by maniplating the handles 20.
  • the concretion By manipulating the handles 20, the concretion is fixed by the jaws and then electric pulses are transmitted to the electrodes 23 and 24 from the generator. After the concretion is crushed, the inspecting device is retracted from the instrument with the aid of the head 22. As soon as the inspecting device 21 is retracted, fluid can be supplied through the passage of the instrument 16 into the bladder to wash it of the crushed concretion.
  • the sonde shown in FIG. 11 is for removing concretions from the ureters and for this purpose, central electrode 32 is mounted in a tube 33 connected with the point of a needle 34.
  • the sonde shown in FIG. 9 differs from that disclosed in FIG. 11 in that head 27 is provided with an end disc 28 having a cenral hole in which a positive electrode 29 is situated thereby preventing the possibility of inflicting any damage to the urethra tissues during the insertion of the sonde.
  • the sonde shown in FIG. 10 does not include a passage for a fluid supply.
  • the sonde is very simple in structural detail and consists of a flexible stem 30 of insulating material and two electrodes 31 enclosed in the stem.
  • the pulse generator includes a power unit consisting of a transformer and a rectifier, an inductance coil, a spark gap, and a discharge circuit including a number of capacitor banks and an additional spark gap.
  • the generator produces steep electric pulses and the crushing of the concretion is effected at a discharge voltage of 5-30 kw. and 700-1100 a. current.
  • the generator provides impulses of short circuit current up to 10 ma. and the voltage of the impulses ranges from 2-16K volts. Impulses are developed during the course of the discharge of the condenser ranging from 0.010.04 mf.
  • An instrument for the removal of concretions from the urinary tract including means for introduction into the bladder and the ureter, a flexible sonde operably associated with said means, said sonde having a discharge head adapted to be positioned adjacent a concretion, said discharge head being defined by concentric inner and outer electrode, said outer electrode having an annular end portion surrounding the inner electrode with said annular end portion and the end of the inner electrode being located at the same level, a flexible current conducting envelope encasing said inner electrode operably connected with the outer electrode, a layer of insulating material between the conducting envelope and the inner electrode, fluid delivery means extending axially of said sonde and having an outlet opening adjacent said discharge head through which fluid is delivered into the zone of the concretion, means operably connected with said inner electrode and envelope for producing electric discharges having a voltage of 5-30 kw. and 700-1100 ,ua. current therebetween which in conjunction with the fluid delivered through said outlet opening develop an electro-hydraulic impact for crushing the concretion, and means for delivering fluid into the zone of the concret
  • An instrument for use in the removal of concretions from the bladder comprising means adapted to be introduced into the bladder, gripping jaws on said means for fixing a concretion, said means having a central axially extending passage, a removable inspecting device associated with said passage, electrodes located on the inner sides of said jaws, and means operably connected with said electrodes for producing electric discharges having a voltage of 5-30 kw. and 700-1100 ,ua. current therebetween for crushing the concretion in the gripping jaws.

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  • Health & Medical Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
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  • Orthopedic Medicine & Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
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  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
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Description

Dec. 3, 1968 v, 025 3,413,976
ARRANGEMENT FOR REMOVAL OF CONCRETIONS FROM URINARY TRACT Filed July 29, 1963 3 Sheets-Sheet I L. v. ROZE 3,413,976 FOR REMOVAL OF CONCRETIONS FROM URINARY TRACT Dec. 3, 1968 v ARRANGEMENT Filed July 29, 1963 3 Sheets-Sheet 2 3,413,976 ETIONS FROM URINARY TRACT Dec. 3, 1968 L. v. ROZE ARRANGEMENT FOR REMOVAL OF CONCR 3 Sheets-Sheet 5 Filed July 29, 1963 United States Patent 3 413,976 ARRANGEMENT FOR REMOVAL OF CONCRE- TIONS FROM URINARY TRACT Leo Voolfovich Roze, Riga, U.S.S.R., assignor t0 Gosudarstvenny Elektrotekhnichesky Zavod VEF Filed July 29, 1963, Ser. No. 298,059 3 Claims. (Cl. 128328) This invention relates to means for the removal of concretions from the urinary tract including the renal tubules and pelvis of the kidney, the ureters, the bladder, and the urethra.
It is known that mechanical tools with gripping elements are in use for the removal of the concretions. How ever, extraction of the concretions with the aid of these instruments is possible only partly with the use of special cystoscopes, bougies for widening the ureters, etc., which makes the operation complicated and rather painful. A lithotrite, an instrument used to crush a concretion prior to its removal, is also in use in present day surgery but this instrument is effective only in removing concretions from the bladder and the operation is also rather complicated.
Attempts to overcome the above problems have been made but none of such prior attempts have proven successful and an important object of the invention is to provide means for solving the problem.
Another object of the invention is to provide means effecting an easy and substantially painless removal of concretions from the urinary tract.
Broadly, the invention provides for the removal of concretions with their preliminary crushing being eifected by electro-hydraulic impact.
The main object of the invention is to provide an arrangement for the removal of concretions from the ureter and the bladder with their preliminary crushing being elfected by electro-hydraulic impacts.
Another objectof the invention is to provide for the crushing of concretions in the ureter emptied of urine.
Another object of the invention is to provide for the crushing of concretions in the urinary bladder with their preliminary fixation.
A further object of the invention is to provide an instrument which is simple in structural detail and which includes a sonde provided with discharge electrodes.
Additional objects and advantages of the invention will become more readily apparent to persons skilled in the art from the following detailed description and annexed drawings and in which drawings:
FIG. 1 is a general view partly in elevation and partly in cross-section of an arrangement for crushing the concretions in the ureter With the components thereof being in the working position.
FIG. 2 is a fragmentary view in cross-section of the head of the instrument, the view being on an enlarged scale.
FIGS. 3-5 are fragmentary cross-sectional views of the head of the instrument illustrating its position relative to a concretion in the ureter prior to crushing, at the initial stage of crushing, and at the end of crushing, respectively.
FIG. 6 is a view partly in elevation and partly in crosssection showing an arrangement used for crushing the concretions in the urinary bladder.
FIG. 7 is an elevational view of another instrument which may be used for the removal of concretions from the urinary bladder.
FIG. 8 is an elevational view of the instrument disclosed in FIG. 7 and showing the same at the moment of gripping a concretion prior to the crushing thereof.
FIGS. 9, 10 and 11 are elevational views partly in cross-section of embodiments of the invention.
The removal of the stones with the assistance of the present instrument is preceded by crushing of the concretion by a high voltage electric discharge in fluids with a vacuum and a cavitation force taking place in the fluid at the moment of disappearance of the discharge so that an object located in the zone of the hydraulic impact will be crushed by the vacuum and cavitation force.
The arrangement according to the invention includes a steep pulse generator and a flexible sonde which is adapted to be introduced into the urinary tract with the generator connected to spaced electrodes so that an electro-hydraulic impact is produced between the electrodes during the electric discharge.
At least two embodiments of the instrument are provided:
(1) An instrument designed to crush a concretion in the ureter and the pelvis, and also in individual cases in the urinary bladder and urethra; the sonde of the instrument is provided with a channel for a fluid required to produce a hydraulic impact and evacuate the crushed concretion particles.
(2) An instrument for the removal of a concretion from the urinary bladder manufactured in the form of urological forceps provided with jaws: for gripping and fixing the concretion and the jaws are equipped with electrodes designed to produce an electric discharge.
FIGS. 1 and 2 show an instrument for crushing concretions in urethra designed on the basis of a urologic cystoscope 1 through which is passed a sonde 2 having electrodes. The sonde is provided with a head 3 which serves as a negative electrode isolated by a tube 4 from positive electrode 5. The electrode 5 is in the form of a long medicine needle having a boss at the end.
The sonde 2 is sheathed by a flexible envelope or covering 7 (FIG. 3) coated with a film of current insulating lacquer 8.
The needle 5 is operably connected to a syringe 9 containing fluid 10 (distilled water, etc.). Electricity is supplied from the generator through conductors 11 with one of the conductors being connected directly with the needle '5 and the other to the envelope 7.
In the position shown in FIG. 1, the cystoscope 1 is introduced into urinary bladder 12 through the urethra and the sonde 2 into one of ureters 13 with its head in the immediate vicinity of a concretion 14 situated in the ureter. Before switching on the current a certain amount of fluid 10 required to produce an electro-hydraulic effect is delivered into the ureter by the syringe 9.
When the current is supplied it will be seen from the dotted lines in FIG. 2 that electric discharges are produced between the negative and positive electrodes 3 and 5, respectively. As mentioned above, a vacuum and cavitation force develops at the moment of disappearance of the discharge for acting upon the concretion 14 and crushing the concretion gradually into separate particles. Following the crushing of the concretion, fluid 10 is supplied to the ureter 13 from the syringe 9 as shown in FIG. 5 for removing the crushed particles after the instrument is withdrawn thereby terminating the removal procedure.
The hydraulic impacts developed are noted for their brisk action which enables the concretion to be crushed into small particles and dependent upon the size and solidity of the concretion, the crushing cycle may be from several seconds to ten minutes. Hydraulic impacts of a proper dosage and direction have no harmful effects on the walls of the urethra and there is an absence of thermal action on the tissues. Moreover, a small amount of the fluid is sufiicient for crushing a concretion.
As disclosed in FIG. 6, the same instrument can be used if it is necessary to crush a concretion in the urinary bladder 12. In this case, it is not necessary for fluid 10 to be supplied and hence the use of the syringe 9.
Central electrode of this instrument can be manufactured without the channel for the fluid.
An instrument for removal of a concretion from the urinary bladder and shown in FIGS. 7 and 8 is in the form of urological forceps 16 provided with a device for gripping and fixing a concretion 17. This device includes gripping jaws 18 and 19 which are pulled by handles 20 located at the base of the instrument 16. The central passage of the instrument bears on anoptical inspecting device 21 attached to a removable head 22 equipped with an ocular.
Plate 23 fixed to the inner side of the jaw 18 serves as a negative electrode and the end of positive electrode 24 is also located at the same place. The electrode is supplied through a current conducting component 25 disposed at the side of the instrument and connected to the generator by conductors 26.
FIG. 7 shows the instrument in the position with its jaws set apart, optical inspecting device 21 extended and when the instrument is inserted into the urethra, the inspecting device is retracted and jaws 1 8 and 19 fold together. After the instrument head is introduced into the urinary bladder 12, the inspecting device is extended again and the jaws 18 and 19 set apart to their extreme position by maniplating the handles 20.
With the instrument set in this position and viewing through the inspecting device 21, the jaws are moved close to the concretion 17.
By manipulating the handles 20, the concretion is fixed by the jaws and then electric pulses are transmitted to the electrodes 23 and 24 from the generator. After the concretion is crushed, the inspecting device is retracted from the instrument with the aid of the head 22. As soon as the inspecting device 21 is retracted, fluid can be supplied through the passage of the instrument 16 into the bladder to wash it of the crushed concretion.
The sonde shown in FIG. 11 is for removing concretions from the ureters and for this purpose, central electrode 32 is mounted in a tube 33 connected with the point of a needle 34.
The sonde shown in FIG. 9 differs from that disclosed in FIG. 11 in that head 27 is provided with an end disc 28 having a cenral hole in which a positive electrode 29 is situated thereby preventing the possibility of inflicting any damage to the urethra tissues during the insertion of the sonde.
The sonde shown in FIG. 10 does not include a passage for a fluid supply. The sonde is very simple in structural detail and consists of a flexible stem 30 of insulating material and two electrodes 31 enclosed in the stem.
The pulse generator includes a power unit consisting of a transformer and a rectifier, an inductance coil, a spark gap, and a discharge circuit including a number of capacitor banks and an additional spark gap. The generator produces steep electric pulses and the crushing of the concretion is effected at a discharge voltage of 5-30 kw. and 700-1100 a. current.
It should be noted that concretions of different chemical composition such as urates, oxalates or phosphatecarbonates can be successfully crushed with the aid of the invention and if the arrangement is properly used, the danger of damage to the tissues is practically eliminated, thus ensuring absolute safety for the patient.
More particularly, the generator provides impulses of short circuit current up to 10 ma. and the voltage of the impulses ranges from 2-16K volts. Impulses are developed during the course of the discharge of the condenser ranging from 0.010.04 mf.
The invention is not to be confined to any strict conformity to the showings in the drawings but changes or modifications may be made therein so long as such changes or modifications mark no material departure from the spirit and scope of the appended claims.
What I claim is:
1. An instrument for the removal of concretions from the urinary tract including means for introduction into the bladder and the ureter, a flexible sonde operably associated with said means, said sonde having a discharge head adapted to be positioned adjacent a concretion, said discharge head being defined by concentric inner and outer electrode, said outer electrode having an annular end portion surrounding the inner electrode with said annular end portion and the end of the inner electrode being located at the same level, a flexible current conducting envelope encasing said inner electrode operably connected with the outer electrode, a layer of insulating material between the conducting envelope and the inner electrode, fluid delivery means extending axially of said sonde and having an outlet opening adjacent said discharge head through which fluid is delivered into the zone of the concretion, means operably connected with said inner electrode and envelope for producing electric discharges having a voltage of 5-30 kw. and 700-1100 ,ua. current therebetween which in conjunction with the fluid delivered through said outlet opening develop an electro-hydraulic impact for crushing the concretion, and means for delivering fluid into the zone of the concretion.
2. The instrument as claimed in claim 1 in which said fluid delivering means is defined by axially extending means provided in said inner electrode is defined by a passage extending axially of said inner electrode.
3. An instrument for use in the removal of concretions from the bladder, comprising means adapted to be introduced into the bladder, gripping jaws on said means for fixing a concretion, said means having a central axially extending passage, a removable inspecting device associated with said passage, electrodes located on the inner sides of said jaws, and means operably connected with said electrodes for producing electric discharges having a voltage of 5-30 kw. and 700-1100 ,ua. current therebetween for crushing the concretion in the gripping jaws.
References Cited UNITED STATES PATENTS 1,303,135 5/1919 Wappler 128-328 2,038,393 4/1936 Wappler 128-7 452,220 5/1891 Gunning 128-408 1,056,366 3/1913 Hurdman l28407 LOUIS G. MANCENE, Primary Examiner.
G. E. MCNEILL, Assistant Examiner.

Claims (1)

1. AN INSTRUMENT FOR THE REMOVAL OF CONCRETIONS FROM THE URINARY TRACT INCLUDING MEANS FOR INTRODUCTION INTO THE BLADDER AND THE URETER, A FLEXIBLE SONDE OPERABLY ASSOCIATED WITH SAID MEANS, SAID SONDE HAVING A DISCHARGE HEAD ADAPTED TO BE POSITIONED ADJACENT A CONCRETION, SAID DISCHARGE HEAD BEING DEFINED BY CONCENTRIC INNER AND OUTER ELECTRODE, SAID OUTER ELECTRODE HAVING AN ANNULAR END PORTION SURROUNDING THE INNER ELECTRODE WITH SAID ANNULAR END PORTION AND THE END OF THE INNER ELECTRODE BEING LOCATED AT THE SAME LEVEL, A FLEXIBLE CURRENT CONDUCTING ENVELOPE ENCASING SAID INNER ELECTRODE OPERABLY CONNECTED WITH THE OUTER ELECTRODE, A LAYER OF INSULATING MATERIAL BETWEEN THE CONDUCTING ENVELOPE AND THE INNER ELECTRODE, FLUID DELIVERY MEANS EXTENDING AXIALLY OF SAID SONDE AND HAVING AN OUTLET OPENING ADJACENT SAID DISCHARGE HEAD THROUGH WHICH FLUID IS DELIVERED INTO THE ZONE OF THE CONCRETION, MEANS OPERABLY CONNECTED WITH SAID INNER ELECTRODE AND ENVELOPE CONNECTED WITH SAID INCHARGES HAVING A VOLTAGE OF 5-30 KW. AND 700-1100 UA. CURRENT THEREBETWEEN WHICH IN CONJUNCTION WITH THE FLUID DELIVERED THROUGH SAID OUTLET OPENING DEVELOP AN ELECTRO-HYDRAULIC IMPACT FOR CRUSHING THE CONCRETION, AND MEANS FOR DELIVERING FLUID INTO THE ZONE OF THE CONCRETION.
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Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557793A (en) * 1965-04-06 1971-01-26 Jury Grigorievich Ediny Method for crushing stones in urinary bladder and instrument for same
US3735764A (en) * 1970-11-23 1973-05-29 O Balev Instrument for crushing stones in urinary bladder
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
US3792701A (en) * 1970-11-03 1974-02-19 E Kloz Neutralising device for urinary, ureteral and kidney pelvis caluli
US3861391A (en) * 1972-07-02 1975-01-21 Blackstone Corp Apparatus for disintegration of urinary calculi
US3908637A (en) * 1974-04-22 1975-09-30 Louis W Doroshow Rigid urethral instrument
US4027674A (en) * 1975-06-06 1977-06-07 Tessler Arthur N Method and device for removing concretions within human ducts
US4030505A (en) * 1975-11-28 1977-06-21 Calculus Instruments Ltd. Method and device for disintegrating stones in human ducts
US4046150A (en) * 1975-07-17 1977-09-06 American Hospital Supply Corporation Medical instrument for locating and removing occlusive objects
US4178935A (en) * 1977-07-21 1979-12-18 Ediny Jury G Method and apparatus for disintegration of urinary concretions
US4196736A (en) * 1976-07-09 1980-04-08 Hiroki Watanabe Apparatus for crushing a calculus
US4535771A (en) * 1981-12-22 1985-08-20 Olympus Optical Co., Ltd. Calculus disintegrating apparatus
US4605003A (en) * 1984-07-03 1986-08-12 Agency Of Industrial Science & Technology Lithotriptor
US4759348A (en) * 1981-09-28 1988-07-26 Cawood Charles David Endoscope assembly and surgical instrument for use therewith
US4807626A (en) * 1985-02-14 1989-02-28 Mcgirr Douglas B Stone extractor and method
US4898574A (en) * 1986-05-08 1990-02-06 Olympus Optical Co., Ltd. Lithotomic apparatus
US5103556A (en) * 1988-05-05 1992-04-14 Circon Corporation Method of manufacturing an electrohydraulic probe
US5154722A (en) * 1988-05-05 1992-10-13 Circon Corporation Electrohydraulic probe having a controlled discharge path
US5542944A (en) * 1993-04-19 1996-08-06 Bhatta; Krishan M. Surgical device and method
US20020165523A1 (en) * 2000-03-02 2002-11-07 Chin Albert C. C. Multilayer medical device
US20040097963A1 (en) * 2002-11-19 2004-05-20 Seddon J. Michael Method and apparatus for disintegrating urinary tract stones
US20120221013A1 (en) * 2008-06-13 2012-08-30 Daniel Hawkins Non-cavitation shockwave balloon catheter system
US9044619B2 (en) 2008-11-05 2015-06-02 Shockwave Medical, Inc. Shockwave valvuloplasty catheter system
US9289224B2 (en) 2011-11-08 2016-03-22 Shockwave Medical, Inc. Shock wave valvuloplasty device with moveable shock wave generator
US9333000B2 (en) 2012-09-13 2016-05-10 Shockwave Medical, Inc. Shockwave catheter system with energy control
US9433428B2 (en) 2012-08-06 2016-09-06 Shockwave Medical, Inc. Low profile electrodes for an angioplasty shock wave catheter
US9522012B2 (en) 2012-09-13 2016-12-20 Shockwave Medical, Inc. Shockwave catheter system with energy control
US9554815B2 (en) 2012-08-08 2017-01-31 Shockwave Medical, Inc. Shockwave valvuloplasty with multiple balloons
US9642673B2 (en) 2012-06-27 2017-05-09 Shockwave Medical, Inc. Shock wave balloon catheter with multiple shock wave sources
US9730715B2 (en) 2014-05-08 2017-08-15 Shockwave Medical, Inc. Shock wave guide wire
US10039561B2 (en) 2008-06-13 2018-08-07 Shockwave Medical, Inc. Shockwave balloon catheter system
US10226265B2 (en) 2016-04-25 2019-03-12 Shockwave Medical, Inc. Shock wave device with polarity switching
US10357264B2 (en) 2016-12-06 2019-07-23 Shockwave Medical, Inc. Shock wave balloon catheter with insertable electrodes
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