Fragmentation of biliary calculi by means of extracorporeally generated piezoelectric shock waves
| Autor: | N. Heyder, H Langer, E C Foerster, Wolfram Domschke, Ch. Ell, W. Kerzel |
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| Rok vydání: | 1989 |
| Předmět: |
Shock wave
medicine.medical_specialty Physiology Chemistry business.industry medicine.medical_treatment Gastroenterology Gallstones Gallbladder Stone Lithotripsy medicine.disease Extracorporeal Surgery Intensity (physics) Volume (thermodynamics) Cholelithiasis medicine Humans Ultrasonics Fragmentation (cell biology) Nuclear medicine business |
| Zdroj: | Digestive Diseases and Sciences. 34:1006-1010 |
| ISSN: | 1573-2568 0163-2116 |
| Popis: | 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. After shock-wave application, the chemical composition of the stones was investigated by x-ray diffractometry and/or infrared spectrometry. All the stones (maximum diameter 6-30 mm) were successfully fragmented; calculi with a maximum diameter of 17 mm, a maximum weight of 1800 mg, and a maximum volume of 2 cc were regularly disintegrated into fragments less than or equal to 4 mm. The number of shock waves required correlated most closely with volume (r = 0.82, P less than 0.001), weight (r = 0.81, P less than 0.001) and, to a somewhat lesser degree, diameter (r = 0.62, P less than 0.001). No correlation was found between the chemical composition, CT density, or MR intensity of the calculi and the number of pulses needed for fragmentation. |
| Databáze: | OpenAIRE |
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