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Vol. 39. Issue 5.
Pages 291-295 (June 2015)
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Vol. 39. Issue 5.
Pages 291-295 (June 2015)
Original article
Analysis of the safety profile of treatment with a large number of shock waves per session in extracorporeal lithotripsy
Análisis del perfil de seguridad del tratamiento con un número ampliado de ondas de choque por sesión en litotricia extracorpórea
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A. Budía Albaa,b, J.D. López Acónb,
Corresponding author
jdanilo41@hotmail.com

Corresponding author.
, A. Polo-Rodrigob, P. Bahílo-Mateub, M. Trassierra-Villab, F. Boronat-Tormoa,b
a Hospital Virgen del Consuelo-Grupo NISA de Valencia, Valencia, Spain
b Hospital Universitario y Politécnico La Fe, Valencia, Spain
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Tables (2)
Table 1. Descriptive and comparative analysis of the clinical features and treatment in both groups.
Table 2. Frequency and distribution of the complications detected in both groups.
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Abstract
Objective

To assess the safety of increasing the number of waves per session in the treatment of urolithiasis using extracorporeal lithotripsy.

Materials and methods

Prospective, comparative, nonrandomized parallel study of patients with renoureteral lithiasis and an indication for extracorporeal lithotripsy for the patients who were consecutively enrolled between 2009 and 2010. We compared group I (160 patients) treated on schedule with a standard number of waves/session (mean 2858.3±302.8) using a Dornier lithotripter U/15/50 against group II (172 patients) treated with an expanded number of waves/session (mean, 6728.9±889.6) using a Siemens Modularis lithotripter. The study variables were age, sex, location, stone size, number of waves/session and total number of waves to resolution, stone-free rate (SFR) and rate of complications (Clavien–Dindo classification). Student's t-test and the chi-squared test were employed for the statistical analysis.

Results

The total rate of complications was 11.9% and 10.46% for groups I and II, respectively (p=.39). All complications were minor (Clavien–Dindo grade I). The most common complications were colic pain and hematuria in groups I and II, respectively, with a similar treatment intolerance rate (p>.05). The total number of waves necessary was lower in group II than in group I (p=.001), with SFRs of 96.5% and 71.5%, respectively (p=.001).

Conclusion

Treatment with an expanded number of waves per session in extracorporeal lithotripsy does not increase the rate of complications or their severity, however, extracorporeal lithotripsy could increase the overall effectiveness of the treatment.

Keywords:
Extracorporeal lithotripsy
Number of shock waves
Safety
Complications
Resumen
Objetivo

Evaluar la seguridad del incremento del número de ondas por sesión en el tratamiento de la litiasis urinaria mediante litotricia extracorpórea.

Material y métodos

Estudio prospectivo, comparativo, no aleatorizado, de grupos paralelos de pacientes con litiasis reno-ureteral e indicación de litotricia extracorpórea incluidos consecutivamente entre 2009 y 2010. Se comparó un grupo i (160 pacientes) tratado programadamente con un número medio de ondas/sesión estándar (2858,3±302,8) y un litotriptor Dornier Lithotripter U/15/50, frente a un grupo ii (172 pacientes) tratado con un número medio de ondas/sesión ampliado (6728,9±889,6) y un litotriptor Siemens Modularis. Las variables analizadas fueron edad, sexo, localización, tamaño de la litiasis, número de ondas/sesión y totales hasta la resolución, tasa libre de litiasis (TLL) y tasa de complicaciones (clasificación Clavien-Dindo). Para el análisis estadístico fueron empleados la «t» de Student y la Chi cuadrado.

Resultados

La tasa de complicaciones totales fue 11,9% para el grupo i y 10,46% para el grupo ii (p=0,39). Todas ellas fueron complicaciones menores grado i (Clavien-Dindo). La más frecuente en el grupo i fue el dolor cólico y en el grupo ii la hematuria, con tasa de intolerancia al tratamiento similar (p>0,05). El número de ondas totales necesarias fue inferior en el grupo ii respecto al grupo i (p=0,001), con TLL del 96,5% y 71,5% respectivamente (p=0,001).

Conclusión

El tratamiento con un número ampliado de ondas por sesión en litotricia extracorpórea no implica mayor tasa de complicaciones ni mayor severidad de las mismas. Sin embargo, podría aumentar la efectividad global del tratamiento.

Palabras clave:
Litotricia extracorpórea
Número de ondas de choque
Seguridad
Complicaciones

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