[Value of vascular ultrasound in the evaluation of hemodialysis fistulas]. / Formen und Komplikationen des Hämodialyseshunts - Stellenwert der Sonographie.
Radiologe
; 48(3): 272-80, 2008 Mar.
Article
em De
| MEDLINE
| ID: mdl-17273820
ABSTRACT
Vascular ultrasound has been proven to be effective in the assessment of hemodialysis fistulas providing noninvasive diagnostic work-up of vascular morphology and hemodynamics. The most common reason for hemodialysis fistula failure is thrombosis due to stenosis. Therefore, early identification of stenosis is essential to avoid complications. Ultrasound-based identification of hypoechoic plaques and intimal proliferation helps to reach therapeutic decisions. An estimation of the grade of stenosis is also feasible. An occlusion rate of up to 45% due to reduced blood flow justifies follow-up examinations. Due to frequent puncture of the fistula the risk of hemodynamically relevant stenoses is increased. Establishment of new ultrasound methods like B-flow and advanced dynamic flow (ADF) enable direct visualization of the flow in the area of the anastomosis. In addition, high-resolution ultrasound techniques allow improved flow detection without aliasing. Our report addresses the topics of examination strategy, possible complications, and treatment like percutaneous intervention techniques.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vasos Sanguíneos
/
Derivação Arteriovenosa Cirúrgica
/
Ultrassonografia
/
Diálise Renal
/
Oclusão de Enxerto Vascular
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
De
Revista:
Radiologe
Ano de publicação:
2008
Tipo de documento:
Article