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Statements

Subject Item
n2:RIV%2F00064165%3A_____%2F12%3A13561%21RIV13-MZ0-00064165
rdf:type
n8:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.5301/jva.5000047
dcterms:description
Purpose: Patency of mature vascular access for hemodialysis is mostly limited by the growing stenoses leading to acute access thrombosis. The therapy of choice is usually percutaneous balloon angioplasty (PTA). However, PTA injures the vessel wall and subsequent re-stenosis develops faster than de novo stenosis. Therefore, the key is in appropriate timing of PTA procedures - as late as possible but before access thrombosis develops. Ultrasonography combines the morphologic and functional access assessment, but the former is less precise than angiography. The aim of this study was to compare ultrasonographic and angiographic measuring of residual diameter as the additional criterion of significant stenoses used in our center. Methods: Residual diameter of significant stenoses was measured by B-mode ultrasonography three times in 20 patients. All the patients were indicated for angiography and the residual diameter of the stenoses was re-analyzed by this method. The repeatability of ultrasonographic residual diameter measurements and reproducibility in comparison to angiography were expressed by coefficients of variation (CV). Results: The residual diameter was 1.69 +/- 0.05 mm by ultrasound and 1.65 +/- 0.59 mm measured by angiography. In the ultrasound repeatability study, CV was 3.17 +/- 2.76% and in the reproducibility study CV was 18.0 +/- 15.6%. All the stenoses found to be significant by ultrasound were above 65% by angiography and PTA was performed. Conclusions: Ultrasonographic measurement of the residual diameter is stable in experienced hands and is well comparable to angiography results. These findings advocate residual diameter of 2.0 mm as the strong additional criterion of the significant stenoses, which can also be used in ultrasound surveillance of arteriovenous grafts. Purpose: Patency of mature vascular access for hemodialysis is mostly limited by the growing stenoses leading to acute access thrombosis. The therapy of choice is usually percutaneous balloon angioplasty (PTA). However, PTA injures the vessel wall and subsequent re-stenosis develops faster than de novo stenosis. Therefore, the key is in appropriate timing of PTA procedures - as late as possible but before access thrombosis develops. Ultrasonography combines the morphologic and functional access assessment, but the former is less precise than angiography. The aim of this study was to compare ultrasonographic and angiographic measuring of residual diameter as the additional criterion of significant stenoses used in our center. Methods: Residual diameter of significant stenoses was measured by B-mode ultrasonography three times in 20 patients. All the patients were indicated for angiography and the residual diameter of the stenoses was re-analyzed by this method. The repeatability of ultrasonographic residual diameter measurements and reproducibility in comparison to angiography were expressed by coefficients of variation (CV). Results: The residual diameter was 1.69 +/- 0.05 mm by ultrasound and 1.65 +/- 0.59 mm measured by angiography. In the ultrasound repeatability study, CV was 3.17 +/- 2.76% and in the reproducibility study CV was 18.0 +/- 15.6%. All the stenoses found to be significant by ultrasound were above 65% by angiography and PTA was performed. Conclusions: Ultrasonographic measurement of the residual diameter is stable in experienced hands and is well comparable to angiography results. These findings advocate residual diameter of 2.0 mm as the strong additional criterion of the significant stenoses, which can also be used in ultrasound surveillance of arteriovenous grafts.
dcterms:title
More precise diagnosis of access stenosis: ultrasonography versus angiography More precise diagnosis of access stenosis: ultrasonography versus angiography
skos:prefLabel
More precise diagnosis of access stenosis: ultrasonography versus angiography More precise diagnosis of access stenosis: ultrasonography versus angiography
skos:notation
RIV/00064165:_____/12:13561!RIV13-MZ0-00064165
n8:predkladatel
n18:ico%3A00064165
n3:aktivita
n17:I n17:P
n3:aktivity
I, P(NS10590)
n3:cisloPeriodika
3
n3:dodaniDat
n10:2013
n3:domaciTvurceVysledku
n6:8167044 n6:9483047 n6:6204104 n6:2863715
n3:druhVysledku
n15:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
151810
n3:idVysledku
RIV/00064165:_____/12:13561
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Angiography; Duplex Doppler ultrasound; Hemodialysis vascular access; Residual diameter; Significant stenosis; hemodialysis vascular access; percutaneous transluminal angioplasty; internal carotid-artery; ultrasound surveillance; neointimal hyperplasia; arteriovenous grafts; ptfe grafts; blood-flow; short-term; patency
n3:klicoveSlovo
n4:patency n4:hemodialysis%20vascular%20access n4:short-term n4:Significant%20stenosis n4:Angiography n4:ptfe%20grafts n4:ultrasound%20surveillance n4:arteriovenous%20grafts n4:internal%20carotid-artery n4:Hemodialysis%20vascular%20access n4:blood-flow n4:neointimal%20hyperplasia n4:percutaneous%20transluminal%20angioplasty n4:Duplex%20Doppler%20ultrasound n4:Residual%20diameter
n3:kodStatuVydavatele
IT - Italská republika
n3:kontrolniKodProRIV
[C074B4D3EBCC]
n3:nazevZdroje
Journal of Vascular Access
n3:obor
n11:FA
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n9:NS10590
n3:rokUplatneniVysledku
n10:2012
n3:svazekPeriodika
13
n3:tvurceVysledku
Tuka, Vladimír Malík, Jan Kaván, Jan Kudlička, Jaroslav
n3:wos
000310197200009
s:issn
1129-7298
s:numberOfPages
5