Stenosis is the most frequent vascular access complication and is responsible for access thrombosis and thus long-term patency limitation. Regular arteriovenous graft (AVG) examination by ultrasonography and preemptive balloon angioplasty prolong AVG cumulative patency according to some, but by far not all trials. This was why the routine use of ultrasound surveillance is not recommended recently.In this review we show huge differences in the definition of stenosis significance among the trials and other probable factors, which may have caused the contradiction of the results. Without precise definition of stenosis significance, many AVGs have been undergoing unnecessary balloon interventions with high morbidity, high cost and low benefit.

• MeSH
• arteriovenózní zkrat škodlivé účinky   MeSH
• cévy - implantace protéz škodlivé účinky   MeSH
• dialýza ledvin * MeSH
• duplexní dopplerovská ultrasonografie * MeSH
• lidé MeSH
• okluze cévního štěpu etiologie   patofyziologie   ultrasonografie   MeSH
• prediktivní hodnota testů MeSH
• průchodnost cév MeSH
• regionální krevní průtok MeSH
• rychlost toku krve MeSH
• trombóza etiologie   patofyziologie   ultrasonografie   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH

Chronic hemodialysis therapy required regular entry into the patient's blood stream with adequate flow. The use of arteriovenous fistulas and grafts is linked with lower morbidity and mortality than the use of catheters. However, these types of accesses are frequently affected by stenoses, which decrease the flow and lead to both inadequate dialysis and access thrombosis. The idea of duplex Doppler ultrasound surveillance is based on the presumption that in-time diagnosis of an asymptomatic significant stenosis and its treatment prolongs access patency. Details of performed trials are conflicting, and current guidelines do not support ultrasound surveillance. This review article summarizes the trials performed and focuses on the reasons of conflicting results. We stress the need of precise standardized criteria of significant access stenosis and the weakness of the metaanalyses performed.

• MeSH
• arteriovenózní zkrat * škodlivé účinky   MeSH
• dialýza ledvin MeSH
• duplexní dopplerovská ultrasonografie MeSH
• lidé MeSH
• okluze cévního štěpu diagnostické zobrazování   etiologie   terapie   MeSH
• průchodnost cév MeSH
• ultrasonografie MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH