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Power Doppler imaging in acute renal vein occlusion and recanalization: a canine model.

Yoo SY, Kim IO, Kim YI, Lee KH, Lee MW, Youn BJ, Kim WS, Yeon KM - Korean J Radiol (2008 Mar-Apr)

Bottom Line: The PD images were transferred to a personal computer, and the PD signals were quantified.The sequential change of the mean value of the PD signal was statistically significant.The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea. kimio@radcom.snu.ac.kr.

ABSTRACT

Objective: To evaluate the dynamic changes of the power Doppler (PD) in acute renal vein occlusion and recanalization in a canine model.

Materials and methods: We performed a PD of the kidney during graded renal vein occlusion and recanalization induced by balloon inflation and deflation in nine dogs. The PD images were transferred to a personal computer, and the PD signals were quantified.

Results: We observed the temporal change of the PD signal during renal vein occlusion and recanalization, with a decrease in the PD signal during occlusion and an increase during recanalization. The mean PD signal decreased gradually as the renal vein was occluded, and conversely increased gradually with sequential relief of occlusion. The sequential change of the mean value of the PD signal was statistically significant.

Conclusion: The PD can detect a change in renal blood flow during acute renal vein occlusion and recanalization in a canine model. The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.

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Related in: MedlinePlus

Sequential change of the longitudinal power Doppler image of same region of dog kidney, during graded renal vein occlusion and recanalization. Baseline (A), partial occlusion (B), complete occlusion (C), partial recanalization (D), complete recanalization (E), and removal of catheter (F).
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Figure 2: Sequential change of the longitudinal power Doppler image of same region of dog kidney, during graded renal vein occlusion and recanalization. Baseline (A), partial occlusion (B), complete occlusion (C), partial recanalization (D), complete recanalization (E), and removal of catheter (F).

Mentions: The PD images revealed a decrease in the signal intensity as the renal vein was occluded, and an increase after recanalization, as measured on the visual scale reading (Fig. 2). The time course of the PD signal during renal vein occlusion and recanalization in a dog is shown in Fig. 3. Prior to a balloon occlusion, the mean±standard deviation PD signal was 2.88×106±5.43×105. During the partial and complete occlusion, the PD signal decreased to 2.23×106±9.63×105 and 1.15×106±8.82×105, respectively. After balloon deflation, the PD signal increased to 1.60×106±1.32×105, and 2.92×106±1.18×105 during partial and complete recanalization, respectively. After removing the balloon catheter, the PD signal was 3.52×106±8.73×105, which was greater than at the observed baseline. The sequential change of the mean PD signal value was statistically significant (Fig. 4, p < 0.01).


Power Doppler imaging in acute renal vein occlusion and recanalization: a canine model.

Yoo SY, Kim IO, Kim YI, Lee KH, Lee MW, Youn BJ, Kim WS, Yeon KM - Korean J Radiol (2008 Mar-Apr)

Sequential change of the longitudinal power Doppler image of same region of dog kidney, during graded renal vein occlusion and recanalization. Baseline (A), partial occlusion (B), complete occlusion (C), partial recanalization (D), complete recanalization (E), and removal of catheter (F).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2627218&req=5

Figure 2: Sequential change of the longitudinal power Doppler image of same region of dog kidney, during graded renal vein occlusion and recanalization. Baseline (A), partial occlusion (B), complete occlusion (C), partial recanalization (D), complete recanalization (E), and removal of catheter (F).
Mentions: The PD images revealed a decrease in the signal intensity as the renal vein was occluded, and an increase after recanalization, as measured on the visual scale reading (Fig. 2). The time course of the PD signal during renal vein occlusion and recanalization in a dog is shown in Fig. 3. Prior to a balloon occlusion, the mean±standard deviation PD signal was 2.88×106±5.43×105. During the partial and complete occlusion, the PD signal decreased to 2.23×106±9.63×105 and 1.15×106±8.82×105, respectively. After balloon deflation, the PD signal increased to 1.60×106±1.32×105, and 2.92×106±1.18×105 during partial and complete recanalization, respectively. After removing the balloon catheter, the PD signal was 3.52×106±8.73×105, which was greater than at the observed baseline. The sequential change of the mean PD signal value was statistically significant (Fig. 4, p < 0.01).

Bottom Line: The PD images were transferred to a personal computer, and the PD signals were quantified.The sequential change of the mean value of the PD signal was statistically significant.The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea. kimio@radcom.snu.ac.kr.

ABSTRACT

Objective: To evaluate the dynamic changes of the power Doppler (PD) in acute renal vein occlusion and recanalization in a canine model.

Materials and methods: We performed a PD of the kidney during graded renal vein occlusion and recanalization induced by balloon inflation and deflation in nine dogs. The PD images were transferred to a personal computer, and the PD signals were quantified.

Results: We observed the temporal change of the PD signal during renal vein occlusion and recanalization, with a decrease in the PD signal during occlusion and an increase during recanalization. The mean PD signal decreased gradually as the renal vein was occluded, and conversely increased gradually with sequential relief of occlusion. The sequential change of the mean value of the PD signal was statistically significant.

Conclusion: The PD can detect a change in renal blood flow during acute renal vein occlusion and recanalization in a canine model. The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.

Show MeSH
Related in: MedlinePlus