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Inicio Radiología (English Edition) Efficacy and complications in the use of self-expanding colonic stents: An analy...
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Vol. 57. Issue 5.
Pages 402-411 (September - October 2015)
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Vol. 57. Issue 5.
Pages 402-411 (September - October 2015)
Original article
Efficacy and complications in the use of self-expanding colonic stents: An analysis of 15 years’ experience
Eficacia y complicaciones en el empleo de prótesis autoexpandibles de colon: análisis de un periodo de 15 años
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J.D. Samper Wamba
Corresponding author
samper.wamba@gmail.com

Corresponding author.
, A. Fernández Martínez, L. González Pastrana, L. López González, Ó. Balboa Arregui
Servicio de Radiodiagnóstico, Complejo Asistencial Universitario de León, León, Spain
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Figures (2)
Tables (5)
Table 1. Overall characteristics of the proceeding to deliver self-expanding colonic stents in our hospital (n=478).
Table 2. Comparative analysis based on the location of the obstructive disease.
Table 3. Evolutive analysis of the proceeding based on the two established periods.
Table 4. Study of the possible factors associated with complications during follow-up.
Table 5. Summary of the comparative dosimetric analysis based on how the hydrophilic guidewire is introduced.
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Abstract
Objective

To analyze the efficacy and safety of the procedure for placing self-expanding stents in the colon. To evaluate the factors associated with complications. To analyze the dose of radiation delivered in the procedure.

Material and methods

This was a retrospective descriptive study of 478 procedures done at a single center to place self-expanding metallic stents in the colon. A total of 423 nitinol stents and 79 stainless steel stents were placed. We included all colonic obstructions, of which 446 had malignant causes and 8 had benign causes. We excluded patients with intestinal perforation, severe colonic bleeding, short life expectancy, or lesions located less than 5cm from the anus. We collected the dosimetric data and analyzed the technical success, clinical success, and complications during follow-up.

Results

The procedure was a technical success in 92.26% of cases (n=441) and a clinical success in 78.45% (n=375); complications occurred during follow-up in 18.5% of cases. Complications occurred more frequently with the stainless steel stents than with the nitinol stents (OR: 3.2; 95% CI: 1.8–5.7). The mean value of the dose area product was 35Gycm2. When instead of being done by the interventional radiologist working together with an endoscopist the procedure was done exclusively by the interventional radiologist, the time under fluoroscopy (p=0.001), dose area product (p=0.029), and kinetic energy released per unit mass (p=0.001) were greater.

Conclusion

The procedure for placing self-expanding colonic stents is efficacious and safe with an acceptable rate of complications. The doses of radiation delivered were low, and the radiation doses and time under fluoroscopy were lower when the procedure was done together with an endoscopist.

Keywords:
Self-expanding stents
Colon
Colorectal carcinoma
Fluoroscopy
Resumen
Objetivo

Analizar la eficacia y seguridad del procedimiento para colocar las prótesis autoexpandibles de colon. Evaluar los factores asociados a complicaciones. Realizar un análisis dosimétrico del procedimiento.

Material y métodos

Realizamos un estudio descriptivo retrospectivo unicéntrico de 478 procedimientos para colocar prótesis metálicas autoexpandibles de colon. Se insertaron 423 prótesis de nitinol y 79 de acero inoxidable. Incluimos todas las obstrucciones de colon, 446 de etiología maligna y 8 de causa benigna. Excluimos los pacientes con perforación intestinal, hemorragia grave del colon, esperanza de vida corta y lesiones situadas a menos de 5cm del ano. Analizamos el éxito técnico, éxito clínico, las complicaciones durante el seguimiento y recogimos los datos dosimétricos.

Resultados

Se obtuvo éxito técnico en un 92,26% (n=441), éxito clínico en un 78,45% (n=375) y un porcentaje de complicaciones durante el seguimiento del 18,5%. Las prótesis de acero tuvieron más complicaciones (OR: 3,2; IC 95%: 1,8-5,7). El valor medio de producto dosis por área fue 35Gy.cm2. El de tiempo de fluoroscopia (p=0,001), producto dosis por área (p=0,029) y kerma (p=0,001) fueron mayores si el procedimiento fue realizado exclusivamente por fluoroscopia, en vez de conjuntamente por el endoscopista y el radiólogo intervencionista.

Conclusión

El procedimiento para colocar prótesis autoexpandibles de colon es eficaz y seguro, con una tasa aceptable de complicaciones. Las dosis de radiación fueron bajas, con menos dosis y tiempos de fluoroscopia cuando el procedimiento se realizó de manera conjunta con el endoscopista.

Palabras clave:
Prótesis autoexpandibles
Colon
Carcinoma colorrectal
Fluoroscopia

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