S-Space College of Medicine/School of Medicine (의과대학/대학원) Urology (비뇨기과학전공) Journal Papers (저널논문_비뇨기과학전공)
Urodynamic and Histological Changes in a Sterile Rabbit Vesicoureteral Reflux Model
- Baek, Minki; Paick, Sung Hyun; Jeong, Seong Jin; Hong, Sung Kyu; Choi, Hwang; Kim, Soo Woong
- Issue Date
- KOREAN ACAD MEDICAL SCIENCES
- JOURNAL OF KOREAN MEDICAL SCIENCE; Vol.25 9; 1352-1358
- This manuscript was presented at annual meeting of American Urological Association, Orlando, Florida, May 17-22, 2008(Abstract No. 95972).
- This study aimed to investigate pressure changes of renal pelvis and histological change of kidneys in a surgically induced sterile rabbit vesicoureteral reflux (VUR) model. Five rabbits served as a control group, 7 as the sham-operated group, and 8 served as the VUR group. Three weeks later, urodynamic studies were performed, and histological examinations evaluated degree of inflammation, fibrosis, and tubular damage in the kidneys. At a low infusion rate, renal pelvic pressure in the VUR group was stable until late filling phase and then increased slightly. At a high infusion rate, the renal pelvic pressures of the sham-operated and control groups were stable until late filling phase and then increased slightly, whereas the renal pelvic pressure in the VUR group steadily increased from mid filling phase. Focal thinning of the tubular epithelium and interstitial widening were observed in certain cortical areas of refluxing kidneys, without inflammatory cell infiltration. Obvious changes in the mean diameters of distal tubules and extracellular matrix volume fractions were observed in two highly refluxing kidneys. High pressure reflux with bladder instability may result in renal cortical changes.