Use of Doppler ultrasonography to evaluate renal arterial blood flow in horses.
Abstract: To obtain Doppler ultrasonographic images of renal arteries in horses and to establish reference range values for systolic and diastolic renal arterial blood flow and resistive indices. Also to determine whether Doppler ultrasonography could be used in horses to detect changes in renal blood flow after IV administration of furosemide. Methods: 11 clinically normal adult horses. Methods: Pulsed-wave Doppler examinations were performed on arcuate arteries of 5 sedated horses. Continuous-wave Doppler examinations were performed on pyelorenal arteries in 7 nonsedated horses and were repeated in 6 horses after furosemide administration. Peak-systolic velocity (SV) and end-diastolic velocity (EDV) were measured and the resistive indices (RI) were calculated. Results: Using pulse-wave Doppler ultrasonography in sedated horses, arcuate arteries were determined to have a SV of 0.406 +/- 0.116 m/s (mean +/- SD), EDV of 0.184 +/- 0.057 m/s, and RI of 0.549 +/- 0.044. Using continuous-wave Doppler ultrasonography in nonsedated horses, pyelorenal arteries were determined to have SV of 1.047 +/- 0.009 m/s, EDV of 0.510 +/- 0.006 m/s, and RI of 0.512 +/- 0.004. Doppler waveforms from the arcuate and pyelorenal arteries had a low resistance flow pattern, characterized by a systolic peak followed by a continuous antegrade diastolic flow. After furosemide administration, the pyelorenal arterial velocities increased, but the RI remained unchanged. Conclusions: Doppler ultrasonography may be used to record renal blood flow in horses and to detect changes following furosemide administration. Conclusions: Doppler ultrasonographic images may assist in the diagnosis of renal diseases that affect either blood flow or Doppler waveform.
Publication Date: 1997-07-01 PubMed ID: 9215441
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This research paper discusses the evaluation of renal arterial blood flow in horses using Doppler ultrasonography. The study establishes reference values for renal blood flow and tests the ability of this method to detect flow changes after the administration of a certain drug.
Methodology
- The researchers performed Doppler ultrasonographic examinations on two types of arteries in horses; arcuate arteries in sedated horses and pyelorenal arteries in non-sedated horses. They then repeated these tests on six horses after administration of furosemide, a diuretic drug.
- The examinations involved measuring the peak-systolic velocity (SV), end-diastolic velocity (EDV), and calculating the resistive indices (RI), which are indicators of the resistance to blood flow within the vessels.
Results
- Results showed that the arcuate arteries in sedated horses had a peak systolic velocity of 0.406 m/s, end-diastolic velocity of 0.184 m/s, and a resistive index of 0.549. The pyelorenal arteries in non-sedated horses, on the other hand, had a peak systolic velocity of 1.047 m/s, end-diastolic velocity of 0.510 m/s, and a resistive index of 0.512.
- These values indicated a low resistance flow pattern in the arteries, characterized by a systolic peak followed by a continuous antegrade diastolic flow. This pattern was maintained even after the administration of furosemide, although with increased arterial velocities. The resistive index, however, remained unchanged.
Conclusions
- The study concluded that Doppler ultrasonography can be used to record and assess renal blood flow in horses, and to detect flow changes following the administration of furosemide.
- Furthermore, the researchers suggested that the Doppler images obtained during the study could assist in the diagnosis of renal diseases that either affect the blood flow or the Doppler waveform.
Cite This Article
APA
Hoffmann KL, Wood AK, Kirby AC.
(1997).
Use of Doppler ultrasonography to evaluate renal arterial blood flow in horses.
Am J Vet Res, 58(7), 697-701.
Publication
Researcher Affiliations
- Department of Veterinary Clinical Sciences, University of Sydney, NSW, Australia.
MeSH Terms
- Animals
- Blood Flow Velocity / drug effects
- Diastole / drug effects
- Furosemide / pharmacology
- Horses / physiology
- Renal Artery / diagnostic imaging
- Renal Artery / drug effects
- Renal Circulation / drug effects
- Systole / drug effects
- Ultrasonography, Doppler / veterinary
- Vascular Resistance / drug effects
Citations
This article has been cited 2 times.- Freccero F, Petrucelli M, Cipone M, Nocera I, Sgorbini M. Doppler evaluation of renal resistivity index in healthy conscious horses and donkeys.. PLoS One 2020;15(2):e0228741.
- Siwinska N, Zak A, Slowikowska M, Szczepankiewicz B, Niedzwiedz A, Paslawska U. An assessment of the utility and repeatability of the renal resistive index in horses.. PLoS One 2019;14(12):e0226941.
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