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Fragmentation Of Gallstones

Evaluation of electrohydraulic lithotripsy as a means of

Jun 01, 1987 Evaluation of electrohydraulic lithotripsy as a means of gallstone fragmentation in a canine model c. E. Sievert, Jr. S. E. Silvis Electrohydraulic lithotripsy EL is defined as the fragmentation of calculi or stones by electrically induced fluid shock waves.

Fragmentation was not related to the composition of the gallstones there was no statistical difference between the fragmentation times or rates p 0.05 in cholesterol stones and pigment stones by either method. Fragmentation time was linearly related to gallstone weight for both methods.

On certain occasions considerable difficulties arise during attempts to remove gallstones from the biliary tract. Calculi in the hepatic ducts found at the operation may tax the skill of a man with a wide experience in this type of work, not to speak of a general surgeon who encounters such...

Surgical intervention following fragmentation of gallstones by extracorporeal shock waves ... In a third patient with gallbladder and common bile duct stones, acute cholecystitis developed after lithotripsy of common bile duct stones. Cholecystectomy was performed and a t-tube was inserted in the bile duct. In all patients, the postoperative ...

The wavelength dependence of the fragmentation of gallstones was investigated using pulsed excimer, ruby and Nd-YAG lasers. Fracturing is due to the shock waves produced by the plasma formed at the irradiated surface. The fluence threshold for plasma production and the associated acoustic signal was found to depend on the absorption coefficient at the laser wavelength. Using a simple model ...

Wavelength dependence of laser fragmentation of gallstones

Comparison of methods for transcatheter fragmentation of gallstones Jeffrey P. Johnson, Mehmet C. Oz, Roy S.H. Chuck , Michael R. Treat Research output Contribution to journal Article peer-review

Comparison of methods for transcatheter fragmentation of

Bile Duct Stones Can you Get Gallstones without a

Feb 21, 2020 Shock wave Lithotripsy involves fragmentation of gallstones present in the bile duct. Breaking the stones into smaller pieces allow them to easily pass through the duct or get captured. Stones which cannot pass on their own or which cannot be removed by BES are removed by lithotripsy. This method has a limitation as it increases the chances of ...

Fragmenting gallstones Nursing Standard 107748ns238

Jun 25, 1988 Fragmenting gallstones Fragmenting gallstones 1988-06-25 000000 Thirty-eight patients were treated using the technique and in 34 fragmentation of the gallstones was achieved. More than one treatment was needed for 25. Difficulty in localising the stones and no evidence of fragmenetation following four treatments accounted for three of the four failures.

Fragmenting gallstones Nursing Standard 107748ns238

Gallstone fragmentation with contact electrohydraulic

To identify physical and technical factors that have an effect on fragmentation, the authors performed in vitro contact electrohydraulic lithotripsy EHL on gallstones 10 mm or larger in size. Of 122 gallstones, 113 93 could be fragmented with 1-46 pulses from a 3-F electrode average, 10 pulses.

It is shown that infra-red lambda equals 1064 nm long pulse approximately 100 microseconds radiation of YAGNd laser, operating in free generation regime, effectively fragments gallstones, urinary calculus and kidney stones. The features of the mechanism of this process are investigated. Laser lithotripsy is nowadays a method widely used for fragmentation of gallstones, urinary ...

Fragmentation of gallstones using extracorporeal shock

Fragmentation of gallstones using extracorporeal shock waves An in Vitro study Roland Schachler, Department of Medicine II and Department of Radiology, Klinikum Grosshadern, University of Munich, Institute of Medical Physics, University of M nster, Federal Republic of Germany.

Fragmentation of gallstones using extracorporeal shock

Aug 01, 1991 To compare the fragmentation efficiency of three different shockwave systems, 63 human gallstone triplets were disintegrated in vitro using an electrohydraulic MPL 9000, Dornier, an electromagnetic Lithostar Plus, Siemens and a piezoelectric Piezolith 2300, R. Wolf lithotripter. Since each stone triplet was obtained from the same gallbladder, the concrements of one such set were ...

In vitro fragmentation of gallstones Comparison of

The authors have investigated the fragmentation of gallstones using the pulsed HoYAG laser, comparing it to lithotripsy using the visible pulsed-dye laser. They find that the physical mechanisms of stone fragmentation appear to be quite different in the two cases. Using high-speed photography, measurement of acoustic transients, time-resolved optical emission spectroscopy, and direct ...

Mechanisms of biliary stone fragmentation using the

Features of gallstone and kidney stone fragmentation by

May 12, 1995 The features of the mechanism of this process are investigated. Laser lithotripsy is nowadays a method widely used for fragmentation of gallstones, urinary calculus and kidney stones. Flashlamp pumped dye lasers of microsecond duration are most often used for such purposes.

ShockWave Lithotripsy of Gallbladder Stones NEJM

Abstract To substantiate the early results of extracorporeal shock-wave fragmentation of gallstones, we used this nonsurgical procedure to treat 175 patients with radiolucent gallbladder calculi.

Gallbladder stones Shockwave therapy ScienceDirect

Nov 01, 1992 GALLSTONE FRAGMENTATION Shockwaves can be generated extracorporeally by electrohydraulic, piezoceramic or electromagnetic lithotripters Sauerbruch et al, 1988. All devices provide focusing of the shockwaves into a small space of only few millimetres in diameter. Depending on the machine type, pressure gradients reach up to 100 MPa bars or ...

Gallbladder stones Shockwave therapy ScienceDirect

Mechanisms of biliary stone fragmentation using the

The authors have investigated the fragmentation of gallstones using the pulsed HoYAG laser, comparing it to lithotripsy using the visible pulsed-dye laser. They find that the physical mechanisms of stone fragmentation appear to be quite different in the two cases. Using high-speed photography, measurement of acoustic transients, time-resolved optical emission spectroscopy, and direct ...

Mechanisms of biliary stone fragmentation using the

28 May 1993 Laser lithotripsy of gallstones alexandrite and rhodamine-6G versus coumarin dye laser fragmentation and fiber burn-off in vitro Juergen Hochberger M.D. , Marion Bredt , Gudrun Mueller M.D. , Eckhart G. Hahn , Christian Ell

Laser lithotripsy of gallstones alexandrite and rhodamine

Surgical intervention following fragmentation of gallstones by extracorporeal shock waves. Teichmann RK, Sauerbruch T, Sackmann M, Holl J, Paumgartner G, Heberer G. Comment in World J Surg. 1990 Jul-Aug144552. Five cases of surgical intervention following extracorporeal shock wave lithotripsy ESWL of gallbladder and bile duct stones are ...

Comparison of methods for transcatheter fragmentation of gallstones Jeffrey P. Johnson, Mehmet C. Oz, Roy S.H. Chuck , Michael R. Treat Research output Contribution to journal Article peer-review

December 1991 AS IN GALLSTONES 1629 gallstone fragmentation involves the propagation of compressional and tensile waves within the stone. The incident acoustic shock wave produces a compres- sional wave in the stone material, which propagates through the stone until it

Gas in Gallstones Quantitative Determinations and