Effects of dexmedetomidine on microcirculatory perfusion in rabbits with renal ischemia/reperfusion injury: quantitative evaluation with contrast-enhanced ultrasound / 南方医科大学学报
Journal of Southern Medical University
;
(12): 628-632, 2016.
Article
in Chinese
| WPRIM
| ID: wpr-263991
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effects of dexmedetomidine on renal microcirculatory perfusion in rabbits with renal ischemia/reperfusion (I/R) injury rabbit by quantitative analysis of contrast-enhanced ultrasound (CEUS).</p><p><b>METHODS</b>Twenty- four New Zealand rabbits were randomly divided into 3 groups (8 in each), including a control group, renal I/R injury group and dexmedetomidine group. In the latter two groups, the right kidney of the rabbits was resected and I/R injury was induced in the left kidney. In dexmedetomidine group, the rabbits received an intraperitoneal dose of 10 µg/kg dexmedetomidine 30 min before renal ischemia, and 24 h after reperfusion, the renal size and renal artery resistance (RI) were measured, and renal cortex perfusion was observed by CEUS. The time-to-peak intensity (TTP), peak signal intensity (PSI), gradient between start frame to peak frame (Grad) and area under the curve (AUC) were quantitatively analyzed using the time-intensity curves. Pathological changes of the kidney were also observed.</p><p><b>RESULTS</b>Compared with the control group, the rabbits in I/R and dexmedetomidine groups showed distinct changes of the renal size with obvious renal pathologies. RI, PPT and AUC all increased, and PSI and Grad decreased significantly in I/R and dexmedetomidine groups (P<0.05). Compared with I/R group, obvious improvement of the renal size and renal pathologies were observed in dexmedetomidine group, which showed significantly decreased RI, PPT and AUC and increased PSI and Grad (P<0.05).</p><p><b>CONCLUSION</b>CEUS combined with the time-intensity curve parameters allows quantitative and dynamic analysis of the protective effects of dexmedetomidine on microcirculatory perfusion in rabbits with renal I/R injury.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Renal Artery
/
Reperfusion Injury
/
Dexmedetomidine
/
Disease Models, Animal
/
Drug Therapy
/
Kidney
/
Kidney Diseases
/
Microcirculation
Type of study:
Prognostic study
Limits:
Animals
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2016
Type:
Article
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