Jornal Vascular Brasileiro
https://jvascbras.org/article/doi/10.1590/1677-5449.202000142
Jornal Vascular Brasileiro
Original Article

Stent fractures in the superficial femoral artery: predisposing factors and their implications

Fraturas de stents na artéria femoral superficial: fatores predisponentes e suas implicações

Fernando Trés Silveira; Álvaro Razuk Filho; Paulo Fernandes Saad; Karen Ruggeri Saad; Gustavo José Politzer Telles; Pedro Ivo C. Ravizzini; Roberto Augusto Caffaro; Valter Castelli Júnior

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Abstract

Abstract: Background: Fractures in stents implanted in the superficial femoral artery (SFA) are recognized complications of endovascular management of this arterial territory.

Objectives: The objective of this study was to determine the prevalence of fractures in stents implanted in the SFA and to identify predisposing factors for these fractures together with their impact on the patency of these devices.

Methods: The study included 39 patients (65.7±9.0 years) who previously underwent angioplasty for delivery of 56 stents into the SFA. During follow-up, which ranged from 7 to 46 months, variables were collected on the characteristics of the lesions treated and characteristics of the stents implanted. Two examiners independently analyzed digital radiographs for the presence of stent fractures and the patency of the devices.

Results: We found a 10.7% prevalence of fracture of implanted stents. Implantation of multiple stents was identified as a significant predisposing factor for fractures. We observed a marked tendency for fractures in female patients and in lesions treated with longer stents (> 150 mm). Stenosis exceeding 50% and occlusions were significantly more frequent in fractured stents.

Conclusions: This study suggests that implants longer than 150 mm and multiple stents are associated with higher device fracture rates. In cases with stent fractures, stenoses exceeding 50% and occlusions were significantly more frequent.

Keywords

peripheral arterial disease, stents, endovascular procedures

Resumo

Resumo: Contexto: As fraturas de stents implantados na artéria femoral superficial (AFS) são uma complicação reconhecida pós-tratamento endovascular desse território arterial.

Objetivos: Este estudo objetivou determinar a presença de fraturas nos stents implantados na AFS e identificar fatores predisponentes para essas fraturas, juntamente com o impacto na perviedade desses dispositivos.

Métodos: Foram incluídos 39 pacientes (65,7±9,0 anos) previamente submetidos à angioplastia para colocação de 56 stents na AFS. Durante o seguimento, que variou de 7 a 46 meses, foram coletadas variáveis referentes às características das lesões tratadas e às características dos stents implantados. Dois examinadores analisaram radiografias digitais para verificar a presença de fraturas de stent e a perviedade dos dispositivos independentemente.

Resultados: Foi encontrada uma prevalência de 10,7% de fratura nos stents implantados. O implante de múltiplos stents foi identificado como fator predisponente significativo para fraturas. Foi observada uma tendência acentuada de fraturas em pacientes do sexo feminino e em lesões tratadas com stents mais longos (> 150 mm). As estenoses acima de 50% e as oclusões foram significativamente mais frequentes em stents fraturados.

Conclusões: Este estudo sugere que implantes de múltiplos stents ou de stents com extensão maior que 150 mm estão associados a maiores taxas de fraturas do dispositivo. No caso de fraturas de stents, as estenoses mais significativas que 50% e as oclusões foram consideravelmente mais frequentes.
 

Palavras-chave

doença arterial periférica, stents, procedimentos endovasculares

References

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Submitted date:
03/03/2020

Accepted date:
09/23/2020

Sociedade Brasileira de Angiologia e Cirurgia Vascular (SBACV)"> Sociedade Brasileira de Angiologia e Cirurgia Vascular (SBACV)">
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