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Titolo:
Flow measurements in dialysis shunts: lack of agreement between conventional Doppler, CVI-Q, and ultrasound dilution
Autore:
Zanen, AL; Toonder, IM; Korten, E; Wittens, CHA; Diderich, PPNM;
Indirizzi:
St Franciscus Gasthuis, Dept Nephrol, Rotterdam, Netherlands St FranciscusGasthuis Rotterdam Netherlands ol, Rotterdam, Netherlands St Franciscus Gasthuis, Dept Vasc Surg, Rotterdam, Netherlands St Franciscus Gasthuis Rotterdam Netherlands rg, Rotterdam, Netherlands St Franciscus Gasthuis, Dept Vasc Invest, Rotterdam, Netherlands St Franciscus Gasthuis Rotterdam Netherlands st, Rotterdam, Netherlands
Titolo Testata:
NEPHROLOGY DIALYSIS TRANSPLANTATION
fascicolo: 2, volume: 16, anno: 2001,
pagine: 395 - 399
SICI:
0931-0509(200102)16:2<395:FMIDSL>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
VOLUME FLOW; TIME-DOMAIN; HEMODIALYSIS; VALIDATION; THROMBOSIS;
Keywords:
arteriovenous shunt; blood flow velocity; CVI-Q; haemodialysis; ultrasonography; ultrasound dilution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Zanen, AL Acad Ziekenhuis Dijkzigt, Dept Nephrol, Dr Molewaterpl 40,POB 2040, NL-3000 CA Rotterdam, Netherlands Acad Ziekenhuis Dijkzigt Dr Molewaterpl 40,POB 2040 Rotterdam Netherlands NL-3000 CA
Citazione:
A.L. Zanen et al., "Flow measurements in dialysis shunts: lack of agreement between conventional Doppler, CVI-Q, and ultrasound dilution", NEPH DIAL T, 16(2), 2001, pp. 395-399

Abstract

Background. Measuring flow in dialysis shunts is recommended to predict imminent thrombosis. Multiple use. Numerous ultrasound protocols exist which deter-mine volume flow using a conventional Doppler (CD) frequency shift analysis technique. All of these are subject to potentially large errors. Quantitative colour velocity index (CVI-Q) does not make use of the Doppler equation and is more precise in vitro Ultrasound dilution (UD) measures access flow during dialysis in a non-operator-dependent way. The aim of the present study was to compare these three methods of measuring access flow in vivo for agreement with each other. Methods. In 38 accesses flow was measured by CD, CVI-Q, and UD. All measurements were done during dialysis. Agreement was determined by intraclass correlation coefficient (ICC = R-i) and Bland-Altman analysis. Results. ICC between UD and CVI-Q was R-i = 0.56. ICC between UD and CD was R-i = 0.10, and ICC between CD and CVI-Q was R-i = 0.16. Bland-Altman analysis revealed a bias (mean difference)of -38 ml/min between UD and CVI-Q, a bias of 1129 ml/min between UD and CD, and a bias of 1167 ml/min between CVI-Q and CD. Conclusions. CD measurements did not agree with UD or CVI-Q: much higher values were recorded with the former than with the latter two techniques. The agreement between UD and CVI-Q measurements is low but reasonable. Caution must be applied in comparing and interpreting values of access flow measured by different techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 01:44:37