Ell C, Kerzel W, Langer H, Heyder N, Foerster E, Domschke W
Department of Medicine, University of Erlangen-Nuremberg, F.R.G.
Dig Dis Sci. 1989 Jul;34(7):1006-10. doi: 10.1007/BF01536364.
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.
一种新型体外压电碎石机对胆结石的碎裂能力进行了测试。总共177颗手术切除的胆囊结石接受了压电冲击波治疗。在施加冲击波之前，测定了所有结石的直径、重量和体积以及选定结石的CT密度和MR信号强度。施加冲击波后，通过X射线衍射法和/或红外光谱法研究了结石的化学成分。所有结石（最大直径6 - 30毫米）均成功破碎；最大直径为17毫米、最大重量为1800毫克、最大体积为2立方厘米的结石通常会被破碎成小于或等于4毫米的碎片。所需冲击波的数量与体积相关性最强（r = 0.82，P < 0.001），与重量相关性次之（r = 0.81，P < 0.001），与直径的相关性稍弱（r = 0.62，P < 0.001）。未发现结石的化学成分、CT密度或MR强度与破碎所需脉冲数之间存在相关性。
