Schachler R, Bird N C, Sauerbruch T, Frost E A, Sackmann M, Paumgartner G, Johnson A G
Klinikum Grosshadern, University of Munich, Germany.
Gut. 1991 Mar;32(3):312-5. doi: 10.1136/gut.32.3.312.
A comparative study of the effectiveness of two types of lithotripter in fragmenting gall bladder stones is reported. The machines used were a Piezolith 2300, which generates shock waves by the piezoceramic principle, and a Dornier MPL 9000, which produces the shock waves by underwater spark discharge. With each machine, corresponding stones of 45 pairs of weight and volume matched calculi (median volume 0.5 cm3, median diameter 10.5 mm) obtained at cholecystectomy were treated. All stones were successfully disintegrated (fragments smaller than 2 mm) with up to 5400 (median 628) shocks with the Piezolith and 3450 (median 428) shocks with the MPL 9000 lithotripters. With the Piezolith, operating at the highest power setting, a 1.65 fold median higher number of shocks was required for stone fragmentation than with the MPL 9000 at a medium power setting. Stone volume seemed to be the only determinant which affected ease of fragmentation; composition and density of the stones as assessed by computed tomography did not seem to be governing factors.
本文报道了两种类型碎石机在粉碎胆囊结石有效性方面的比较研究。所使用的机器一种是通过压电陶瓷原理产生冲击波的Piezolith 2300，另一种是通过水下火花放电产生冲击波的Dornier MPL 9000。对每台机器，均使用在胆囊切除术中获取的45对重量和体积匹配的相应结石（中位体积0.5 cm³，中位直径10.5 mm）进行治疗。使用Piezolith碎石机时，所有结石均在最多5400次（中位628次）冲击下成功粉碎（碎片小于2 mm）；使用MPL 9000碎石机时，所有结石均在3450次（中位428次）冲击下成功粉碎。在最高功率设置下运行的Piezolith碎石机，与在中等功率设置下运行的MPL 9000相比，结石粉碎所需的中位冲击次数高出1.65倍。结石体积似乎是影响粉碎难易程度的唯一决定因素；通过计算机断层扫描评估的结石成分和密度似乎不是主导因素。
