Quantitative estimation of renal blood flow by power Doppler ultrasonography in renovascular hypertensive dogs

Miyajima, Tetsumasa; Yokoyama, Hiroshi; Taira, Hiroshi; Tsuji, Yuji

doi:10.1111/j.1523-1755.2005.00749.x

Cited by 9 publications

(10 citation statements)

References 17 publications

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“…Bude et al [18] first reported the imaging ability of PDS on renal cortical blood perfusion. Since then, many studies have used PDS to study the effects of various kidney diseases on renal blood flow [15,[19][20][21] . Previous studies have shown that CPDS can contributes to the diagnosis of APN, Anne Hitzel [7] has shown that although the predictive value of CPDS for renal scar is not high, the results of CPDS and DMSA are consistent in 81% of APN kidneys, suggesting that it is better clinical application value.…”

Section: Comparison Of Abnormal Examination Results Of Different Kidnmentioning

confidence: 99%

New strategy of color and power doppler sonography combined with DMSA in the assessment of acute pyelonephritis in infants

Chen

Yan

Yang

et al. 2019

Preprint

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Objectives The purpose of this study was to evaluate the clinical value of color and power doppler sonography (CPDS) when combined it with 99mTc-dimercaptosuccinic acid scintigraphy (DMSA) in assessment of acute pyelonephritis (APN) in infants. Methods A total of 79 children with APN , including 52 males and 27 females, age range 1 month to 3 years old. All patients underwent laboratory inspection including urinary routine test, clean medium urine culture, urinary β2 microglobulin (β2-MG), urinary N-acetylglucosaminidase (NAG), blood routine test, C-reactive protein(CRP), renal function, serum electrolyte and urinary ultrasound. All 79 patients underwent CPDS and DMSA within 48 hours of fever. Results All 79 patients with fever. The peripheral blood routine showed elevated white blood cells in 75 cases, normal in 4 cases, CRP increased in 77 cases, normal in 2 cases. Urine β2-MG increased in 40 cases and normal in 39 cases. Urinary ultrasonography revealed 2 cases of renal cortical echo changes, 24 cases of kidney enlargement, and 1 left kidney shrinkage. Among 79 children, DMSA showed abnormal findings in 95 kidneys and CPDS, in 105 kidneys. The total sensitivity of CPDS was 69.4%, and the total positive predictive value was 62.8%. The sensitivity of CPDS under 6 months was 56.9%, which was 84.2% between 6 months to 1 year, and 94.4% from 1 to 3 years old, respectively. There was no significant correlation between CPDS levels and DMSA positive results. The abnormal rate of intermediate part in the kidneys was significantly lower than that in the upper and lower poles. Children with abnormal CPDS have a greater risk of renal scarring(p<0.05). Conclusion The sensitive of CPDS is highly age-related, it can as a non-invasive tool for assessment of acute pyelonephritis in infants, especially for infants more than 6 months old. CPDS is useful to be combined with DMSA to assess the APN of infants, for infants more than 6 months with febrile urinary tract infections, CPDS is the first recommendation, and followed by DMSA six months later to assess renal scar formation. For those less than 6 months, the DMSA assessment is still the preferred choice.

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Section: Comparison Of Abnormal Examination Results Of Different Kidnmentioning

confidence: 99%

New strategy of color and power doppler sonography combined with DMSA in the assessment of acute pyelonephritis in infants

Chen

Yan

Yang

et al. 2019

Preprint

View full text Add to dashboard Cite

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“…The application of the ultrasonic flow probe technique in RBF measurement in dogs has been validated (21). This technique was used to provide the reference values of RBF in the studies using power-Doppler ultrasonography and CEUS and to evaluate the change in renal perfusion in dogs with renal arterial stenosis and renovascular hypertension (21,22). After placing the probe to the renal artery, we could continuously measure blood flow with the probe.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Renal Blood Flow Using Maximum Slope-Based Computed Tomography Perfusion and Ultrasound Flow Probe in Healthy Dogs

et al. 2020

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Computed tomography (CT) perfusion can analyze tissue perfusion and quantitative parameters, including blood flow, blood volume, and transit time. CT perfusion has been used for evaluating split renal function. However, its applicability in veterinary medicine was not validated. This study aimed to evaluate the correlation of renal blood flow (RBF) derived by maximum slope-based CT perfusion and an ultrasonic flow probe and assess the effect of the presence of a pre-existing contrast medium on CT perfusion in the kidneys. In five healthy purpose-bred beagles, CT perfusion was performed at the level of the left renal hila after injection of 1 mg/kg iohexol, during measuring RBF with an ultrasonic flow probe placed on the left renal artery. After post-contrast CT scan with injection of 2 mg/kg iohexol, CT perfusion scan was repeated with the same protocol used in the first perfusion study. The CT perfusion derived RBF was analyzed based on the maximum slope and was compared with the true RBF obtained using an ultrasonic flow probe. Results indicated that CT perfusion derived RBF was significantly correlated with true RBF, although CT perfusion derived RBF did not match the absolute value of the true RBF. It was correlated with the true RBF, even in the presence of a pre-existing contrast medium in the kidney. CT perfusion can estimate the change in individual renal perfusion non-invasively, and this method can be used supplementary to the conventional CT protocol in clinic.

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“…The quantitative estimate of the kidney cortical blood flow by spectral Doppler ultrasonography may be useful in the investigation of kidney physiology, providing characterization of a variety of kidney disturbances, including renovascular hypertension (Myajima et al, ). In the CVL‐negative animals the vascular flow observed by the color Doppler and its spectral line agree with comparable findings from Szatmári et al () who studied the main abdominal blood vessels of dogs using Doppler techniques.…”

Section: Discussionmentioning

confidence: 99%

Comparative B‐mode and Doppler renal ultrasonography with histopathological findings in dogs positive for canine visceral leishmaniasis

Baltazar

Moura

Pessoa

et al. 2016

Microscopy Res & Technique

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Morphological parameters and renal flow were assessed and measured in six clinically healthy dogs with negative serological and parasitological examinations for canine visceral leishmaniasis (CVL) and six dogs with CVL-positive serological and parasitological tests and asymptomatic condition of the disease. Kidney length and diameter were measured and compared with the aorta/kidney ratio. Alterations in flow were measured using the flow velocity (cm/s) and resistance index (RI). Renal function was assessed by serum biochemical examination (urea, creatine, total proteins, albumin, and globulin) and urinalysis. CVL-positive animals presented heterogeneous kidney echotexture, reduced vascular flow, hypoperfusion, lesser visualization of the arcuate arteries, high RI values (1.06 ± 0.28 for the right kidney and 1.10 ± 0.30 for the left kidney), reduced diastolic flow, and high systolic peak. They also presented positive creatine/RI correlation and between the renal artery vascular flow and kidney diameter. Histopathological analysis of CVL-positive animals was compatible and confirmed hemodynamic changes observed by Doppler ultrasound. The findings in the present study showed that Doppler ultrasonography is a valid method to assess and detect alterations in flow in renal pathological processes with kidney vascular damage, as in the case of leishmaniasis, and can help in the diagnosis of animals with this infection. Microsc. Res. Tech. 79:637-645, 2016. © 2016 Wiley Periodicals, Inc.

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Quantitative estimation of renal blood flow by power Doppler ultrasonography in renovascular hypertensive dogs

Cited by 9 publications

References 17 publications

New strategy of color and power doppler sonography combined with DMSA in the assessment of acute pyelonephritis in infants

New strategy of color and power doppler sonography combined with DMSA in the assessment of acute pyelonephritis in infants

Comparison of Renal Blood Flow Using Maximum Slope-Based Computed Tomography Perfusion and Ultrasound Flow Probe in Healthy Dogs

Comparative B‐mode and Doppler renal ultrasonography with histopathological findings in dogs positive for canine visceral leishmaniasis

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