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- W2044562017 abstract "Abstract. Why some gallstones do not fragment easily to lithotripsy is unclear. The aim of the present study was to determine gallstone factors associated with resistance to fragmentation. Seventy-six cholesterol rich gallstones were subjected to physical evaluation, in vitro computed tomography, chemical analysis by infra red spectroscopy, and ultrastructural studies (of 26 matched stones) by scanning electron microscopy and energy dispersive X-ray microanalysis. In vitro lithotripsy was performed with the Siemens Lithostar Plus machine at a constant energy level. Of 76 stones, 33 required > 1000 shocks for effective fragmentation (largest diameter ≤ 5 mm); they had significantly higher maximum diameter (P<0·001), volume (P<0·001), weight (P<0·001) and lower stone density distribution (SDD) index (P<0·05) and lower calcium bilirubinate content (P<0·001) than those requiring ≤1000 shocks. Large (> 15 mm; P<0·05), round stones (P<0·02) and gallstones with SDD index of <50 HU (P<0·05) were more difficult to fragment. Clinical application of these parameters may help in better selection of patients for this non-surgical mode of therapy for gallstones." @default.
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- W2044562017 date "1994-01-01" @default.
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- W2044562017 title "Brittleness of gallstones to lithotripsy: effect of physicochemical and ultrastructural characteristics" @default.
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- W2044562017 doi "https://doi.org/10.1111/j.1365-2362.1994.tb02055.x" @default.
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