Extracorporeal shock wave lithotripsy for upper urinary tract stones using piezoelectric shock wave lithotripsy]

Between August 1999 and July 2000, 123 cases of renal stones and 52 cases of ureteral stones in 116 males and 59 females were treated with the New Piezolith 2500. The average number of sessions required for renal and ureteral stones was 2.50 and 1.48, respectively. At 3 months postoperatively, stone-free rates for renal and ureteral stones were 64.2% and 72.7%, respectively. Assessing residual stones less than 4 mm in diameter as an effective treatment outcome, the efficacy rates for renal and ureteral stones were 94.3% and 86.4%, respectively. Side effects were encountered in 5 cases (2.9%) of high fever and one case (0.57%) of renal subcapsular hematoma. New Piezolith 2500 is effective and safe for the treatment of upper urinary stones.     

Extracorporeal shock wave lithotripsy for urinary tract stones using piezoelectric lithotripter (Piezolith)]

A total of 133 stones in renoureteral and bladder units from 122 patients, 8 to 80 years old, were treated by extracorporeal shock wave lithotripsy (ESWL) with the Wolf Piezolith device from November 1989 through December 1990. The 133 stones involved renal stones (91), ureter stones (34) and bladder stones (9). The number of shock waves per session was up to 4,000 shots, the mean number of shots was 3,120. Neither anesthesia nor analgesic agents were used except for epidural anesthesia on 10 and intramuscular analgesics on 8 patients. Fragmentation into particles 4 mm in size or less occurred in 89 of the 91 renal stones (97.8%), 24 of the 34 ureteral stones (70.6%) and 8 of the 8 bladder stones (100%). The mean numbers of treatment on each stone were 3.2, 1.8 and 1.8, respectively. Ultrasound localization restricted treatment of ureteral stones to the most proximal and distal fourth of the ureter.     

体外冲击波碎石术治疗上尿路尿酸结石

作者采用超声定位的压电晶体式体外冲击波碎石术连续性治疗１２１例上尿路尿酸结石，观察其碎石疗效。肾结石１１２例，共１６７枚，结石长径０．５～３．５ｃｍ，平均０．８６ｃｍ；输尿管结石９例，长径０．６～１．３ｃｍ，平均０．８４ｃｍ。２例输尿管上段结石接受了重定位辅助治疗，其余均采用原位治疗。单次治愈者为８０．９９％，２次者１２．４０％，３次者４．９６％，４次者１．６５％。所有患者术后均未发生严重并发症。作者认为采用超声定位的压电晶体式碎石机治疗尿酸结石是一种较为理想的方法，并侧重探讨了尿酸结石的Ｂ超定位技术、碎石过程中的冲击方法和术后碱性药物的应用。     

Extracorporeal shock wave lithotripsy for biliary stones

Extracorporeal shock wave lithotripsy is a noninvasive technique for treatment of patients with gallbladder and bile duct stones. Selected patients with gallbladder stones can be treated on an outpatient basis without general anesthesia and may return to full activity within 1 or 2 days. Stone-free rates of 40% to 60% at 6 months have been achieved in most reported series with minimal morbidity. Bile duct stone lithotripsy has achieved stone clearance in 80% of patients in whom conventional methods were unsuccessful and therefore constitutes a valuable second-line treatment for these patients.     

Extracorporeal shock wave lithotripsy monotherapy for bladder stones

This report presents our initial experience in 36 patients with bladder stones, treated by extracorporeal shock wave lithotripsy. Minute fragmentation and uncomplicated evacuation occurred in 26 patients (72%). Mean treatment duration was 55 minutes. Mean number of shock waves was 3600 and electrical discharge averaged 24 kV per shock wave. No morbidity, during or after treatment, was encountered in these patients. The treatment was performed without the use of anaesthesia on an outpatient basis.     

Extracorporeal shock wave lithotripsy for upper urinary tract stones using the Dornier Lithotripter Compact: an experience in Japan

Between May 1997 and February 1998, 40 cases of renal stones and 40 cases of ureteral stones in 60 males and 20 females were treated with the Dornier Lithotripter Compact. The size of the stones ranged from 5 mm to 80 mm. Three patients required epidural anesthesia and 4 patients required a ureteral stent. Fragmentation of the stones was observed in all patients. After 1 month, the efficacy and stone free rates were 91% and 54%, respectively. After 3 months, they were 91% and 68%, respectively. There were no serious side effects such as pyelonephritis, perirenal hematomas, and massive hematuria. In conclusion, the Dornier Lithotripter Compact proved to be a safe and highly effective lithotripter for the treatment of renal and ureteral stones.     

Extracorporeal shock wave lithotripsy of staghorn stones

One hundred forty-seven cases of staghorn calculi were treated with HM-3 Dornier lithotripter. The stone located at the right tract in 71, the left 65 and 11 bilaterally. Fifteen cases had stones larger than 6 cm in length, the biggest size was 11 cm in diameter. Majority of the patients in this group underwent multiple ESWL treatment. PCN was needed in only 4 cases. For safety reason, The interval between two ESWL treatment should be more than 1 week. All stones were completely fragmented and discharged no longer than 4 months. The overall procedural complications were relatively low and not severe. Hematuria occurred in all the patients, fever in 8.8% and pain in 12.2%. The results of this study indicate that the majority of staghorn stone could be treated satisfactory with ESWL.     

Extracorporeal shock wave lithotripsy for ureteral stones and cystine stones]

We report our experience with extracorporeal shock wave lithotripsy (ESWL) in the treatment of ureteral and cystine stones, which are known to be difficult to treat by this method. First, in order to determine the effectiveness of the ureteral catheter in the destruction of ureteral stones, we compared the clinical results of 121 patients treated without the catheter and 141 patients inserted with the catheter. There was no significant difference in the success rate between the two groups regardless of stone size, which indicates that the use of the ureteral catheter had no effect on the outcome of treatment. We then studied the clinical results of impacted ureteral stones which are especially difficult to destroy. Excretory urography was performed to non-invasively diagnose these stones, and those without visualization in the ureter below the stone were diagnosed as impacted stones and treated by ESWL without the ureteral catheter. Among the stones with a diameter of 1 to 2 cm, the success rate was significantly lower in impacted stones compared to non-impacted stone. These findings suggest that ESWL treatment without the ureteral catheter may be effective for ureteral stones with a diameter of less than 1 cm and non-impacted stones with a diameter of 1 to 2 cm, while combination therapy with other methods such as TUL may be better for other stones. We also performed ESWL on 6 patients with renal stones and 2 patients with ureteral stones which were cystine stones. Renal stones required an average 4.1 treatment with an average of 1,875 shocks per treatment, and ureteral stones required 1.5 treatment with an average of 1,833 shocks.(ABSTRACT TRUNCATED AT 250 WORDS)     

Extracorporeal shock wave lithotripsy (ESWL) for urinary tract stones using Dornier MFL 5000, performed by the technician

As the only lithotripsy centre at a University Hospital in the most crowded city of Turkey, we have a big number of patients with urinary stones. Between April 1990 and August 1993, 2680 sessions of treatment were done to 1257 renal units. Our study reveals that the results obtained by the performance of an experienced technician are just as reliable as those obtained by an experienced urologist.     

中段输尿管结石的原位体外冲击波碎石

目的 报告电磁式体外冲击波原位治疗中段输尿管结石疗效。方法 患者５４例,结石直径为５－２０ｍｍ,平均１１ｍｍ。ＥＳＷＬ治疗时经侧腹部入路并采用工能量冲击技术。工作电压２－７档,发射次数每序列３０００－５０００次,治疗结果代入效率商公式测算。结果 碎石治疗３个月内无石率为９６％,复震率３０％,效率商７４％。     

Extracorporeal shock wave lithotripsy in situ treatment for ureteral stones

Three hundred and sixteen patients with ureteral stones were treated in situ (without retrograde stone manipulation) with and without stent bypass (DJ stent, ureteral catheter). Results were generally better with stent bypass, but only marginally so for stones larger than 10 mm in diameter. Regardless of whether or not the ureter was stented, lower ureteral stones were more difficult to fragment than upper ureteral stones and pre-sacral stones did not respond well to in situ treatment. We observed that evaluation of stone disintegration and fragment evacuation could only be properly assessed after approximately 3 weeks post-ESWL.     

Extracorporeal shock wave lithotripsy for upper urinary tract stone using piezoelectric lithotripter (Piezolith 2200)

The results of clinical trial using the second generation extracorporeal shock wave lithotripter (Piezolith 2200, Wolf, West Germany) were presented. The treatments were performed between December 1987 and March 1988 at the University of Tokyo. In total 59 ESWL sessions were carried out on 32 patients with 48 upper urinary tract stones. The treatment could be performed without anesthesia or analgesic agent in every case. A double-J ureteral stent was indwelling in 6 patients with ureteral stones or large stones before ESWL treatment, and transurethral lithotripsy (TUL) was performed in two patients after the treatment. On the X-ray film obtained three weeks after the final ESWL treatment, 13 cases (40.6%) were completely free from stone fragments, while 9 cases (28.2%) had stone fragments less than or equal to 5 mm. Others had fragments greater than 5 mm. ESWL using this device was clinically useful in 71.9% in the three weeks follow-up period. No serious complication was observed after treatment except macroscopic hematuria for a few days in all cases, pyrexia in 4 cases (12.5%) and flank pain in 7 cases (21.9%). There were slight and transient changes in the laboratory data after the treatment, but these changes were milder than those with spark gap lithotripters. It is concluded that Piezolith 2200 is useful in the management of patients with upper urinary tract stones, and it is applicable more safely than the first generation lithotripters.     

Extracorporeal shock wave lithotripsy as first line treatment for urinary tract stones in children: outcome of 500 cases

Purpose

The continued evolution of stone treatment modalities, such as endourologic procedures, open surgery and shock wave lithotripsy, makes the assessment of continuous outcomes are essential. Pediatric urolithiasis are an important health problem allover the world, especially in Middle East region. We evaluate the safety, efficacy and factors affecting success rate and clearance of stones in children treated with shock wave lithotripsy.

Patient and methods

Between 2005 and 2010, a total of 500 children with stones in the upper urinary tract at different locations were treated by Extracorporeal shock wave lithotripsy (ESWL) in our department, Sohag University, Egypt. We have used the Siemn??s Lithostar Modularis machine, Germany. A total of 371 boys and 129 girls with the average age of 8.63?±?5?years, and a range from 9?months to 17?years were included in this study. Diagnosis of their urinary calculi was established either by the use of abdominal ultrasound, plain X-ray, intravenous urography, or CT scan. The stones were located in the kidney in 450 (90%) patients; 298 (66%) pelvic, 26 (5.7%) upper calices, 57 (12.6%) mid calices, and lower calices in 69 (15.3%) patients. The average of their stone sizes was 12.5?±?7.2?mm. The other 50 children their stone were located in the proximal ureteral stones in 35 patients (70%); middle third in 5 (10%) patients and in the distal ureter in 10 (20%) patients. The average ureteral stone size was 7.5?±?3.2?mm. All children were treated under general anesthesia with adequate lung and testes shielding using air foam. We treated the distal ureteral stones of young children in the supine position through greater sciatic foramen and lesser sciatic foramen as the path of shockwave instead of prone position, which is not a comfortable or natural position and could adversely affect cardiopulmonary function especially under general anesthesia. Localization was mainly done by ultrasound, and X-ray was only used to localize ureteral calculi. For follow-up, we have used abdominal ultrasound, plain X-ray, and CT scan if needed to confirm stone disintegration and clearance.

Results

The overall success rate for renal and ureteral calculi was 83.4 and 58.46%, respectively. The re-treatment rate was 4% in renal group and 28% for the ureteral group. No serious complications were recorded in our patients. Minor complications occurred in 15% of our patients; renal colic was reported in 10% of our treated patients, and repeated vomiting was reported in 5% that respond to antiemetics. In the renal group; children with history of pervious urologic surgical procedures had low success rate of stone clearance after ESWL. In the ureteral group stone burden, stone location, had a significant impact on stone clearance outcome.

Conclusion

This study showed that SWL in pediatric age group for both renal and ureteral stone is cost effective, safe with an acceptable re-treatment rate; however children with large stone burden or previous urologic surgery have low success rate.     

Extracorporeal shock wave lithotripsy of stones in the ureter

In the present paper we report on one-year experience with the application of extracorporeal shock wave lithotripsy (ESWL) in 157 patients with stones in the ureter 63 of which were in the pyeloureteral segment, 52 in the lumbar part and 42 in the distal third. The indications and contraindications for lithotripsy, the peculiarities in performing the manipulation are determined and the results analysed. They are evaluated as very good because 78.98% of the patients have passed completely disintegrated stones up to the tenth day after lithotripsy. The average hospital stay was 4.08 days. The drawback of the method is the high cost of manipulation.     

Extracorporeal shock wave lithotripsy of midureteral stones using the Dornier HM-3

Fifty-three patients were treated in the prone position for stones located in the pre-sacral ureter. Cases were performed at the Orange County Kidney Stone Center by 28 urologists from March 1988-November 1989. A Dornier HM-3 Lithotripter with the original generator, 15.6-cm ellipse, and computerized gantry was used. No repeat treatment was utilized in this series and three failures resulted.     

Extracorporeal shock wave lithotripsy of proximal and distal ureteral stones

Extracorporeal shock wave lithotripsy (ESWL) was used for treatment of 105 patients with ureteral stones. There were 77 stones in the upper part of the ureter, i.e. above the pelvic brim, and 28 in the lower part, i.e. below the sacroiliac joint. Successful fragmentation was attained in 101 (96%). In 93% of the patients with stones in the upper ureter and in 100% with stones in the lower ureter the fragments were eliminated completely. In 87% of the patients with stones in the upper ureter, a ureteral catheter was introduced under local anesthesia but without fluoroscopic control. It was thereby possible to remove 30% of the stones from the ureter to the kidney. For the remaining stones, saline was infused through the catheter during ESWL. For patients with stones in the lower part of the ureter, a ureteral catheter was passed in 79% and saline infused during treatment. Whereas some form of anesthesia was used for treatment of all upper ureteral stones, 89% of the treatments for lower ureteral stones were performed without anesthesia. Auxiliary procedures after ESWL were limited to four ureteral catheter manipulations for distal stones. Four proximal stones which remained unaffected by ESWL had to be treated by open surgery (3 stones) or percutaneous surgery (1 stone). Of 82 ureteric stones treated in situ the success fragmentation rate was 95%. The average number of ESWL sessions was 1.04 for both proximal and distal ureteral stones.     

Extracorporeal shock wave lithotripsy in children: experience using a mpl-9000 lithotriptor

Our objectives were to assess the value of extracorporeal shock wave lithotripsy (ESWL) in treating pediatric urolithiasis, and to determine the factors that may affect treatment success. Between January 1993 and August 2002, 129 children with upper urinary tract calculi (134 renoureteral units) were treated using a Dornier MPL-9000 lithotriptor. The series consisted of 77 boys and 52 girls with an age range from 20 months to 14 years (average age: 8.7 years). All ESWL procedures took place under general anaesthesia or sedation with ketamin or fentanyl. Under ultrasonic or fluoroscopic guidance, children were treated with a maximum 2,550 shocks at an average of 19.5 kV. Success was defined as the lack of any visible stone fragments on post-treatment radiological evaluation. The patients were assessed 3 months after ESWL treatment and the results were compared using ²-tests to detect factors that might be associated with treatment success. There were 105 renal, 20 ureteral, four bilateral renal and one unilateral renal plus contralateral ureteral calculi. The mean sizes were 15.7 mm for pelvic, 17.8 mm for renal and 10.2 mm for ureteral stones. One or two lithotripsy sessions were sufficient in most cases (71.6%). In 15 (11.6%) patients, double J stents introduced before lithotripsy were left indwelling until all stone fragments were voided. Overall success rates were 89.5% for pelvic, 85.5% for renal and 75% for ureteral stones. Complications such as urinary tract infection, Steinstrasse and small subcapsular hematoma occurred in 19 (14.7%) patients. The only significant factor associated with the stone-free rate was the diameter of the stone (P=0.022). This study confirmed that the stone-free rate is significantly influenced by stone size. Because children with stone disease are at risk for a longer period than adults, their cumulative likelihood of stone recurrences may be higher. Thus, we agree with other authorities that minimally invasive treatment, such as ESWL, is mandatory in children with urolithiasis.     

Extracorporeal shock wave lithotripsy for the treatment of pancreatic duct stones

The purpose of endoscopic therapy in chronic pancreatitis is to decompress the main pancreatic duct and to remove the obstacles that impede the ductal flow of pancreatic juice. The availability of extracorporeal shock wave lithotripsy (ESWL) has improved the results of endoscopic drainage of the main pancreatic duct and has also expanded the indications of endoscopic therapy for chronic pancreatitis. This article briefly reviews ESWL for pancreatic duct stones in patients with chronic pancreatitis, including our experience with ESWL. ESWL is an effective and safe procedure for endoscopically unremovable main pancreatic duct stones, and, in selected patients, ESWL alone may be effective.     

Extracorporeal shock wave lithotripsy: first choice therapy for ureteral stones

Extracorporeal shock wave lithotripsy represents the first choice therapy for reno-ureteral stone disease, being successful in more than 85% of cases. When extracorporeal shock wave lithotripsy is associated with both appropriate cystoscopic manipulations and with a proper positioning of the patient on the stretcher of the lithotripter, it can be successfully applied to ureteral stones regardless of their specific location. We report 99 patients with ureteral calculi submitted to extracorporeal shock wave lithotripsy with a stone free rate of 98%.     

Extracorporeal shock wave lithotripsy for the treatment of bulbous urethral stones

Extracorporeal shock wave lithotripsy was used to treat multiple, large, bulbous urethral calculi in a paraplegic man. Prior attempt at endoscopic extraction was unsuccessful owing to the size and location of the calculi. Two treatments of 3,000 shocks each resulted in fragmentation of the calculi