The utility of resistance index of distal interlobular arteries in evaluating renal graft function

Wang, Shuo-Meng; Lai, Ming-Kuen; Chueh, Shih-Chieh; Chen, J.

doi:10.1016/j.transproceed.2004.09.008

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…There are some studies that support our work while some that state the opposite . The creatinine level is stated to be another factor that can affect the value of RI in some studies . In contrast, Quarto et al .…”

Section: Discussionsupporting

confidence: 61%

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The predictive value of resistive index obtained by Doppler ultrasonography early after renal transplantation on long‐term allograft function

Melek

Baskın

Gülleroğlu

et al. 2016

Pediatric Transplantation

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DUSG is a useful diagnostic tool for the follow-up of renal transplant recipients. The measurement of intrarenal arterial RI by DUSG has been proven to predict short-term AF. The aim of the study was to evaluate the predictive value of DUSG performed during the early after RTx on long-term AF. Seventy patients were enrolled into study. DUSG was performed at third and seventh days after RTx. Patients were divided into two groups according to rate of recovery of graft function as patients with normal graft function and abnormal graft function. Although the RI values were correlated with the AF early after transplantation, they were not correlated with long-term AF. However, the rate of recovery of graft function at early period after RTx was correlated with creatinine level at first year and with glomerular filtration rate at first year and last visit. Although the RI has no predictive value for long-term AF, the rate of recovery of graft function at early post-transplantation period has predictive value for long-term AF; patients with higher RI values early after RTx should be followed carefully for the development of chronic allograft injury.

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Section: Discussionsupporting

confidence: 61%

“…Some studies established that recipients and donor age shows good correlation with the value of RI. Krumme et al .…”

Section: Discussionmentioning

confidence: 99%

The predictive value of resistive index obtained by Doppler ultrasonography early after renal transplantation on long‐term allograft function

Melek

Baskın

Gülleroğlu

et al. 2016

Pediatric Transplantation

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“…17 However, RI has some limitations such as wide normal range that makes its values limited. 18 Additionally, many conditions such as acute rejection, acute tubular necrosis, venous thrombosis, hydronephrosis, and pyelonephritis can result in elevation of RI immediately after renal transplant, 17,19 whereas RI changes are not specific for any of these clinical entities. 20 Regardless of these limitations, elevation of RI after renal transplant is an indicator of graft dysfunction that may adversely affect long-term graft survival.…”

Section: Discussionmentioning

confidence: 99%

Relation of Resistive and Pulsatility Indices With Graft Function After Renal Transplant

Ghorbani

Shirazi²,

Sametzadeh³

et al. 2012

Exp Clin Transplant

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Objectives: There are conflicting data regarding the use of some measured indices by Doppler ultrasound such as the resistive index and the pulsatility index in predicting renal allograft dysfunction. This study sought to evaluate the association of early postoperative Doppler indices and 3-month serum creatinine levels in renal transplant recipients. Materials and Methods: During a 1-year period, all patients who underwent renal transplant at our hospital were recruited into a prospective study. Doppler ultrasound was performed on all patients 6 days and 3 months after the transplant and the resistive index and the pulsatility index were calculated for each patient. Then, the association between these indices and 3-month outcomes of patients were investigated. Results: Thirty-eight patients including 21 men (mean age, 36.6 ± 13.1 y) were evaluated. There was a positive correlation between the resistive index and the pulsatility index at 6 days after transplant and the serum creatinine measured at the same day (P < .001 and r=0.570 for resistive index; P < .001 and r=0.547 for pulsatility index). There was also a positive correlation between the pulsatility index and the resistive index at 6 days after transplant and 3-month serum creatinine level (P = .009 and r=0.420 for resistive index; P = .009 and r=0.417 for pulsatility index). There were negative correlations between the resistive index and the pulsatility index on the sixth day after surgery and creatinine clearance measured at 6 days and 3 months after transplant. Conclusions: This study reveals a strong-to-medium correlation between the resistive index and the pulsatility index, serum creatinine level, measured 6 days after transplant.

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“…A ultra-sonografia vascular com Doppler colorido ganhou importante espaço no acompanhamento dos enxertos renais, principalmente na identificação das complicações vasculares e da rejeição aguda, com o estudo do fluxo e da resistividade vascular nas artérias do parênquima renal e com o cálculo do IR e do IP nas artérias interlobares 3,9,10,13,14 .…”

Section: Discussionunclassified

“…A grande vantagem dessa técnica é a possibilidade de estudo do baixo fluxo nas diversas partes do corpo, especialmente nos locais onde os sinais são fracos, seja pelo calibre, seja pela profundidade dos vasos. Essa técnica apresenta um grande potencial na avaliação da perfusão renal, pela maior sensibilidade no estudo dos vasos intraparenquimatosos, principalmente dos pequenos vasos arqueados do córtex renal, sendo três vezes mais sensível do que o ecoDoppler colorido convencional [8][9][10] .…”

Section: Introductionunclassified

Avaliação da perfusão renal pelo Power Doppler em pacientes transplantados renais

et al. 2006

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Objetivos: O objetivo deste estudo é testar a aplicabilidade do estudo ultra-sonográfico com Power Doppler na identificação das alterações da perfusão dos rins transplantados e sua correlação com a reserva funcional renal e microalbuminúria antes e após a infusão de solução de aminoácidos intravenosos.Métodos: Vinte e três pacientes transplantados renais foram avaliados pelo Power Doppler antes (fase basal), após 120 minutos (fase 1) e após 240 minutos (fase 2) da infusão intravenosa de aminoáci-dos. Concomitantemente, foram realizadas, nas três fases, dosagem de creatinina, avaliação do índice de filtração glomerular, da reserva funcional renal e de microalbuminúria.Resultados: De acordo com os padrões de perfusão na fase basal pelo Power Doppler, descritos por Hoyer et al. em 1999, os pacientes foram divididos em três grupos: 12 pacientes com escore I, seis com escore II e cinco com escore III de perfusão renal. Nos enxertos renais com excelente perfusão renal (escore I), observou-se variação significativa das variáveis estudadas, tanto na fase 1 como na 2 (P < 0,05), com exceção da microalbuminúria, que apresentou tendência a alteração significativa com um maior tempo de exposição ao estímulo (fase 2). O mesmo foi observado com os pacientes com escore II, porém sem variação nos níveis de microalbuminúria. Já os pacientes com escore III não apresentaram variações nos parâmetros estudados, estando nesse grupo os dois únicos pacientes que não apresentaram reserva funcional renal.Conclusões: Os achados sugerem que os transplantes com escore I de perfusão apresentam reserva funcional renal quando submetidos a estímulo com aminoácidos. No entanto, com a progressiva diminuição no grau de perfusão renal pelo Power Doppler, observa-se perda da capacidade dos rins transplantados em aumentar o índice de filtração glomerular como resposta a estímulos externos, com seqüente ausência de reserva funcional renal. A partir deste estudo, será possí-vel criar novos horizontes para o entendimento da evolução dinâmica do processo de perda da função renal nos transplantados renais. Palavras-chave:Power Doppler, perfusão renal, transplante renal. AbstractObjectives: The aim of this study was to determine the applicability of Power Doppler ultrasound in the identification of changes in the perfusion of renal transplants and their correlation with renal functional reserve and microalbuminuria before and after the infusion of intravenous amino acids.Methods: Twenty-three renal transplanted patients were assessed by Power Doppler before (baseline), 120 minutes (stage 1) and 240 minutes (stage 2) after the infusion of intravenous amino acids. At the same time, during the three stages, we measured serum creatinine, index of glomerular filtration, renal functional reserve, and microalbuminuria.Results: According to predefined patterns of perfusion by Power Doppler, described by Hoyer et al. in 1999, the patients were divided into three groups: 12 patients with score I, six with score II, and five with score III of renal perfusion. In the ...

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The utility of resistance index of distal interlobular arteries in evaluating renal graft function

Cited by 7 publications

References 2 publications

The predictive value of resistive index obtained by Doppler ultrasonography early after renal transplantation on long‐term allograft function

The predictive value of resistive index obtained by Doppler ultrasonography early after renal transplantation on long‐term allograft function

Relation of Resistive and Pulsatility Indices With Graft Function After Renal Transplant

Avaliação da perfusão renal pelo Power Doppler em pacientes transplantados renais

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