It is shown that infra-red ((lambda) equals 1064 nm) long pulse (approximately 100 microsecond(s) ) radiation of YAG:Nd 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 ...
lead tospontaneous rupture of agallstone giving rise to afamil'' of small stones. Figure 5isanoentgenogram of asungicall'' removed gallstone, demonstrating central gas fissuring extending inatniradiate pat-tern toward the periphery. Progression of this process isprobabl'' the basic factor in spontaneous fragmentation.'' The phenomenon ...
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fragmentation accelerates gallstone clearance. S ize is a strong predictor of cholesterol gallstone dissolution during treatment with the litholytic bile acid ursodeoxycholic acid (ursodiol).'','' Not all gallstones will dissolve, but those stones that eventu- ally do …
fragmentation was described as very good when the maxi- mum fragment size was 55 mm, good if the diameter was 6-10 mm, and moderate or poor in the remaining cases. Ultrasound examination was also used to estimate the amount of small and very small (sludgelike) fragments leaving the gallbladder.
· Fragmentation of gallstones by extracorporeal shock waves. Sauerbruch T, Delius M, Paumgartner G, Holl J, Wess O, Weber W, Hepp W, Brendel W. We treated nine patients with functioning gallbladders containing one to three symptomatic radiolucent stones not larger than 25 mm in diameter, as well as five patients with stones in the common bile ...
Background and objectives: Although laser lithotripsy for fragmentation of gallbladder stones has been applied successfully in many clinical situations, this approach has two major limitations: (1) the potential to damage or perforate the bile duct and (2) the efficiency can be affected by the chemical composition of the gallstones. The present study evaluated the use of time-resolved laser ...
-7vlaser-irradiated kidney stones and gallstones, (3) modeling of laser-driven shock-induced fragmentation of kidney stones and gallstones, and (4) modeling of the above surface hydrodynamics, i.e., bubble grovth and acoustic wave propagation, resulting from plasma-mediated laser energy deposition above a hard tissue surface in a fluid medium.(l
AJR:156, March 1991 GALLSTONE FRAGMENTATION 495. by a pigment band or surrounding a more central portion of. the stone that contained pigment. Of the …
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 …
A new extracorporeal piezoelectric lithotripter was tested for its gallstone disintegration capability. A total of 177 surgically removed gallbladder stones were submitted to piezoelectric shock-wave treatment. Prior to shock-wave application, the diameter, weight, and volume of all the stones and CT density and MR signal intensity of selected stones were determined.
Successful fragmentation, defined as all residual gallstone fragments being less than or equal to 4 mm in greatest dimension, was achieved in 14 of 20 animals overall, but in 10 of 10 animals in which focal point refocusing had been used.
All gallbladder stones were disintegrated into sludge or fragments with diameters of no more than 8 mm. In six of the nine patients the fragments disappeared completely within 1 to 25 weeks.
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Interventional radiologic techniques for the treatment of gallstone disease are becoming more widely available. Percutaneous cholecystostomy [corrected] can be lifesaving in critically ill elderly patients who have acute cholecystitis. Contact dissolution of stones with methyl tert-butyl ether and p …
Alternative methods have been considered for treating cholelithiasis. Compared to extracorporeal shockwave lithotripsy (ESWL), a percutaneous endoscopic approach would be more invasive, but would offer the advantage of immediate stone removal without the need for subsequent drug therapy. We performed an in vitro comparison of three methods of transcatheter cholecystolithotripsy with regard to ...
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Stone Fragmentation A total of 105 gallstones obtained either intraopera- tively or post mortem were investigated (Table 1). The concrements were stored in isotonic saline immediately after recovery. One stone of a group of multiple stones from the same gallbladder was tested for its chemical composi- ...
the gallbladder, perhaps because they sink in bile and gallbladder emptying is only 50°~-700~ in pa- tients with gallstones. In response to these limita- tions of ESWL, oral bile acid therapy has been added to the regimen to dissolve the cholesterol stone components. Most experience with this combined
Fragmentation of gallstones using extracorporeal shock waves: an in vitro study. Schachler R(1), Sauerbruch T, Wosiewitz U, Holl J, Hahn D, Denk R, Neubrand M, Paumgartner G. Author information: (1)Department of Medicine II, Klinikum Grosshadern, University of Munich, Federal Republic of Germany.
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Laparoscopic cholecystectomy can be performed with incisions of a maximum diameter of 10 mm. The removal of a stone-filled gallbladder at the end of an operation via the 10-mm port needs often-extensive tissue-consuming manipulations for stone removal or minilaparotomy. Stone fragmentation can be ac …
· Gallstones grow inside the gallbladder or biliary tract. These stones can be asymptomatic or symptomatic; only gallstones with symptoms or complications are defined as gallstone disease. Based on ...
The authors have investigated the fragmentation of gallstones using the pulsed Ho:YAG 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 ...
· The presence of gas in a gallstone can profoundly affect the ability of shock waves to fragment the stone by various mechanisms. In the present study, the aim was to determine the gas content of gallstones and determine if increasing the gas content of …
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· Gallbladder cancer: 7-Year experience from Qatar Ibnouf Sulieman, Walid Elmoghazy, Walid El Ansari, Ahmed Elaffandi, Hatem Khalaf ... Oxidation–reduction potential and sperm DNA fragmentation, and their associations with sperm morphological anomalies amongst fertile and infertile men ... A Murmansk County Birth Registry Study Olga A. Kharkova ...
The role of each of these methods in the treatment of patients with gallstones will be reviewed, as well as the epidemiology, pathogenesis, natural history, and roentgenographic characteristics of gallstones, all of which are relevant when choosing appropriate therapy for the individual patient. (Arch Intern Med. 1990;150:960-964)
· Bouveret syndrome is a very uncommon form of gallstone ileus caused by the passage and impaction of a large gallstone through a cholecystoduodenal fistula into the duodenum, resulting in gastric outlet obstruction. It was first described in 1770 by Beaussier [ 1.
AJR:156, March1991 GALLSTONE FRAGMENTATION 495 byapigment bandorsurrounding amorecentralportion of thestonethatcontained pigment. Oftheninestoneswithpigmented rims,therimwasless than1mmthickinfivestones and1-3mmthickinthree TABLE 1:Correlation ofImaging,Composition, and Fragmentation Data StoneRadiologic Family Appearancea 1ean Chol …
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The fragmentation of gallstones and kidney stones using pulsed visible laser radiation has recently been demonstrated; however, the fragmentation mechanism is not well understood. The temporal and spectral characteristics of the bright flash of light accompanying fragmentation of gallstones were studied using 0.8 and 360-μs-long, 690-nm-wavelength, dye-laser pulses.
ry response continues. Dropped gallstones can erode through tissue planes and migrate to lie outside the peritoneal cavity in numerous un-usual locations [6, 12, 13]. Eventually, an ab-scess, sinus track, or fistula develops, and the condition becomes symptomatic. Complications of Dropped Gallstones The complications of dropped gallstones
· Cholelithiasis, or gallstones, is one of the most common and costly of all the gastrointestinal diseases. The incidence of gallstones increases …
