Stents in the femoropopliteal territory: prevalence of fractures and their consequences / Stents no território fêmoro-poplíteo: prevalência de fraturas e suas consequências

ABSTRACT Endovascular treatment for femoropopliteal arterial disease has made revascularization procedures less invasive, but the self-expanding stents used can suffer great wear in arteries with extreme mobility. Objective: to evaluate the prevalence of fractures in stents implanted in the femoropopliteal segment, to identify predisposing factors and consequences on arterial patency. Method: between March and June 2019, thirty patients previously operated for femoropopliteal obstruction underwent stent X-rays in anteroposterior and lateral views to detect fractures and Doppler to analyze arterial patency. Results: we observed 12 cases with fractures (33.3%): 1 type I (2.8%), 3 type II (8.3%), 5 type III (13.9%), 3 type IV (8.3%) and no type V. According to the TASC II we had 1 in group B (8.3%), 6 in group C (50%) and 5 in group D (41.6%) p <0.004. The number of stents per limb was 3.1 (± 1.3) in cases of fracture versus 2.3 (± 1.3) in cases without fracture (p = 0.08). The extension was 274.17mm (± 100.94) in cases of fracture and 230.83mm (± 135.44) in cases without fracture (p = 0.29). On Doppler we had: 17 patients (47.2%) without stenosis, 9 patients (25%) with stenosis> 50% and 10 patients (27.8%) with occlusion (p = 0.37). There was no correlation between fracture and arterial obstruction (p = 0.33). Conclusion: stent fractures are a frequent finding in the femoropopliteal area (33.3%), being more prevalent in cases of more advanced disease (C and D). There was no association between the finding of fracture and arterial obstruction.

RESUMO Os tratamentos endovasculares para a doença arterial obstrutiva fêmoro-poplítea tornaram os procedimentos de revascularização menos invasivos, porém os stents metálicos autoexpansíveis utilizados podem sofrer grande desgaste em artérias com extrema mobilidade. Objetivo: avaliar a prevalência de fraturas em stents implantados no segmento fêmoro-poplíteo, identificar fatores predisponentes e possíveis consequências sobre a patência arterial. Métodos: entre março a junho de 2019, trinta pacientes previamente operados por obstrução fêmoro-poplítea realizaram RX dos stents em incidências ântero-posterior e perfil para detectar fraturas e eco Doppler para analisar a patência arterial. Resultados: observamos 12 casos com fraturas (33,3%): 1 do tipo I (2,8%), 3 do tipo II (8,3%), 5 do tipo III (13,9%), 3 do tipo IV (8,3%) e nenhuma tipo V. Segundo a classificação TASC II, tivemos 1 no grupo B (8,3%), 6 no grupo C (50%) e 5 no grupo D (41,6%) p<0,004. O número de stents por membro foi de 3,1 (±1,3) nos casos de fratura contra 2,3 (±1,3) nos casos sem fratura (p = 0,08). A extensão tratada foi 274,17mm (±100,94) nos casos de fratura e 230,83mm (±135,44) nos casos sem fratura (p=0,29). No Doppler tivemos: 17 pacientes (47,2%) sem estenose, 9 pacientes (25%) com estenose>50% e 10 pacientes (27,8%) com oclusão (p=0,37). Não houve correlação entre fratura e obstrução arterial (p=0,33). Conclusão: as fraturas de stents são um achado frequente no setor fêmoro-poplíteo (33,3%) sendo mais prevalentes nos casos de doença mais avançada TASC II C e D. Não houve associação entre o achado de fratura e obstrução arterial.

Enfermedades vasculares periféricas y niveles de calidad de vida en el municipio Diez de Octubre / Peripheral vascular diseases and levels of quality of life in 10 of October municipality

Objetivo: Determinar la prevalencia de las enfermedades vasculares periféricas y los niveles de calidad de vida en el municipio "Diez de Octubre". Métodos: Estudio descriptivo en una muestra aleatorizada (n= 200) de los 201 586 habitantes del municipio. El diagnóstico de las enfermedades vasculares periféricas se realizó por examen físico-vascular confirmado por estudios hemodinámico, ultrasonográfico, y ecográfico. Se aplicó el cuestionario de "Calidad de vida" SF-36 a los mayores de 18 años sin discapacidad mental. Resultados: La tasa de enfermedades vasculares periféricas fue de 66 por 100 000 habitantes debida a las flebopatías (59,5 por ciento), la macroangiopatia diabética (13,9 por ciento), la enfermedad arterial periférica (8,4 por ciento) y la cerebrovascular (6,4 por ciento). Los factores de riesgo más frecuentes fueron: obesidad (48,5 por ciento), hipertensión arterial (37,5 por ciento) y tabaquismo (33,5 por ciento). Hubo un incremento de enfermedades vasculares periféricas a partir de los 50 años con la presencia de dos o más enfermedades en el 37,3 por ciento. De las personas. En aquellas con enfermedad vascular se encontró una disminución (p < 0,05) en todas las escalas de la calidad de vida con un deterioro en la medida sumaria "salud física", la que se encontró asociada a su presencia (χ2 = 27,11; p = 0,001). Conclusiones: En el municipio Diez de Octubre, hay una elevada tasa de enfermedades vasculares periféricas con un deterioro importante en los niveles de calidad de vida de las personas que la padecen(AU)

Objective: To determine the prevalence of peripheral vascular diseases and the levels of quality of life in 10 of October municipality. Methods: A descriptive study was conducted on a random sample (n=200) from 201 586 inhabitants of the municipality. The diagnosis of peripheral vascular diseases was performed by physical-vascular examination confirmed by hemodynamic, ultrasound, and echo-Doppler studies. The "Quality of life" questionnaire SF-36 was applied to people older than 18 years without mental disabilities. Results: The rate of peripheral vascular disease was 66 per 100 000 inhabitants due to phlebopathies (59.5 percent), diabetic macroangiopathy (13.9 percent), peripheral arterial disease (8.4 percent) and cerebrovascular disease (6.4percent). The most frequent risk factors were obesity (48.5 percent), hypertension (37.5 percent) and smoking (33.5 percent). There was an increase in peripheral vascular diseases after the age of 50 years with two or more types of diseases in 37.3 percent of the population. A decrease (p <0.05) in all the quality of life scales, with deterioration in the disease-related summary measure "physical health", was found in people with vascular disorders (χ2= 27.11; p= 0.001). Conclusions: In 10 of October municipality, there is a high rate of peripheral vascular diseases with a significant deterioration of the quality of life of people who suffer them(AU)

The Primary Patency and Fracture Rates of Self-Expandable Nitinol Stents Placed in the Popliteal Arteries, Especially in the P2 and P3 Segments, in Korean Patients

OBJECTIVE: We wanted to evaluate the status of self-expandable nitinol stents implanted in the P2 and P3 segments of the popliteal artery in Korean patients. MATERIALS AND METHODS: We retrospectively analyzed 189 consecutive patients who underwent endovascular treatment for stenoocclusive lesions in the femoropopliteal artery from July 2003 to March 2009, and 18 patients who underwent stent placement in popliteal arterial P2 and P3 segments were finally enrolled. Lesion patency was evaluated by ultrasound or CT angiography, and stent fracture was assessed by plain X-rays at 1, 3, 6 and 12 months and annually thereafter. RESULTS: At the 1-month follow-up, stent fracture (Type 2) was seen in one limb (up to P3, 1 of 18, 6%) and it was identified in seven limbs at the 3-month follow-up (Type 2, Type 3, Type 4) (n = 1: up to P2; n = 6: P3). At the 6-month follow-up, one more fracture (Type 1) (up to P3) was noted. At the 1-year follow-up, there were no additional stent fractures. Just four limbs (up to P2) at the 2-year follow-up did not have stent fracture. The primary patency was 94%, 61% and 44% at 1, 3 and 6 months, respectively, and the group with stent implantation up to P3 had a higher fracture rate than that of the group that underwent stenting up to P2 (p < 0.05). CONCLUSION: We suggest that stent placement up to the popliteal arterial P3 segment and over P2 in an Asian population can worsen the stent patency owing to stent fracture. It may be necessary to develop a stent design and structure for the Asian population that can resist the bending force in the knee joint.