The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform

Svend Larsen - One of the best experts on this subject based on the ideXlab platform.

  • intrarenal backflow during Retrograde Pyelography with graded intrapelvic pressure a pathoanatomic study
    Apmis, 2009
    Co-Authors: Henrik S. Thomsen, Svend Larsen
    Abstract:

    Histologic examination was performed in 21 baby-pig kidneys after Retrograde Pyelography with a mixture of meglumine sodium diatrizoate and Ferritin at intrapelvic pressures of either 30–35 or 70–75 mm Hg. In further 4 kidneys light microscopy was done after Retrograde Pyelography with a mixture of barium sulfate and gelatin at an intrapelvic pressure of 70–75 mm Hg. The primary pathway for intrarenal backflow was canalicular. The contrast material entered the interstitium only by one route: Tubular leakage. Only in the central portions of the kidney leakage was seen. Interstitial Ferritin was found more frequently in areas with intrarenal backflow at an intrapelvic pressure of 70–75 mm Hg than of 30–35 mm Hg.

Henrik S. Thomsen - One of the best experts on this subject based on the ideXlab platform.

  • intrarenal backflow during Retrograde Pyelography with graded intrapelvic pressure a pathoanatomic study
    Apmis, 2009
    Co-Authors: Henrik S. Thomsen, Svend Larsen
    Abstract:

    Histologic examination was performed in 21 baby-pig kidneys after Retrograde Pyelography with a mixture of meglumine sodium diatrizoate and Ferritin at intrapelvic pressures of either 30–35 or 70–75 mm Hg. In further 4 kidneys light microscopy was done after Retrograde Pyelography with a mixture of barium sulfate and gelatin at an intrapelvic pressure of 70–75 mm Hg. The primary pathway for intrarenal backflow was canalicular. The contrast material entered the interstitium only by one route: Tubular leakage. Only in the central portions of the kidney leakage was seen. Interstitial Ferritin was found more frequently in areas with intrarenal backflow at an intrapelvic pressure of 70–75 mm Hg than of 30–35 mm Hg.

Demetrius H Bagley - One of the best experts on this subject based on the ideXlab platform.

  • surveillance of upper urinary tract transitional cell carcinoma the role of ureteroscopy Retrograde Pyelography cytology and urinalysis
    The Journal of Urology, 2000
    Co-Authors: Gregory L Chen, Ehab A Elgabry, Demetrius H Bagley
    Abstract:

    Purpose: A select group of patients with upper tract transitional cell carcinoma are treated with ureteroscopic resection. We determine the validity and accuracy of urinalysis, bladder cytology, upper tract biopsy/cytology and Retrograde Pyelography for the detection of recurrent upper tract transitional cell carcinoma compared to endoscopic findings.Materials and Methods: Patients with ureteroscopically treated upper tract transitional cell carcinoma were followed with surveillance every 3 to 6 months. Surveillance included urinalysis with dipstick and microscopic examination, bladder cytology, Retrograde Pyelography read by a urologist and radiologist, and ureteropyeloscopy with cytology and biopsy of suspicious areas. Not all results were available for all surveillance procedures. Measures of sensitivity and specificity for the aforementioned surveillance procedures were determined relative to endoscopic findings that were defined as the standard. Confidence intervals were also estimated. Initially, a ...

Gregory L Chen - One of the best experts on this subject based on the ideXlab platform.

  • surveillance of upper urinary tract transitional cell carcinoma the role of ureteroscopy Retrograde Pyelography cytology and urinalysis
    The Journal of Urology, 2000
    Co-Authors: Gregory L Chen, Ehab A Elgabry, Demetrius H Bagley
    Abstract:

    Purpose: A select group of patients with upper tract transitional cell carcinoma are treated with ureteroscopic resection. We determine the validity and accuracy of urinalysis, bladder cytology, upper tract biopsy/cytology and Retrograde Pyelography for the detection of recurrent upper tract transitional cell carcinoma compared to endoscopic findings.Materials and Methods: Patients with ureteroscopically treated upper tract transitional cell carcinoma were followed with surveillance every 3 to 6 months. Surveillance included urinalysis with dipstick and microscopic examination, bladder cytology, Retrograde Pyelography read by a urologist and radiologist, and ureteropyeloscopy with cytology and biopsy of suspicious areas. Not all results were available for all surveillance procedures. Measures of sensitivity and specificity for the aforementioned surveillance procedures were determined relative to endoscopic findings that were defined as the standard. Confidence intervals were also estimated. Initially, a ...

M Majd - One of the best experts on this subject based on the ideXlab platform.

  • Pediatric pyeloplasty : is routine Retrograde Pyelography necessary ?
    The Journal of Urology, 1994
    Co-Authors: H G Rushton, A B Belman, Yousef H. Salem, M Majd
    Abstract:

    AbstractTo evaluate the necessity for Retrograde Pyelography in the preoperative evaluation of children undergoing pyeloplasty, we reviewed the records of 108 consecutive patients (age range 5 days to 18 years, median 1 year) who underwent pyeloplasty at our institution during a 6-year period. The routine preoperative evaluation consisted of a renal/bladder sonogram, furosemide renal scan (99mtechnetium-diethylenetriaminepentaacetic acid or 99mtechnetium-mercaptoacetyltriglycine) and voiding cystogram. No other imaging studies were obtained in 95 patients (88%). Other upper tract studies usually performed before referral included excretory urography in 9 cases and computerized tomography in 5. Preoperative Retrograde Pyelography was only performed in 1 symptomatic patient before referral to our institution. Surgical findings confirmed obstruction at the ureteropelvic junction in all patients. Undetected ureteral dilatation, which might suggest undiagnosed distal obstruction, was not encountered. After pye...

  • pediatric pyeloplasty is routine Retrograde Pyelography necessary
    The Journal of Urology, 1994
    Co-Authors: Gil H Rushton, Y Salem, Barry A Belman, M Majd
    Abstract:

    AbstractTo evaluate the necessity for Retrograde Pyelography in the preoperative evaluation of children undergoing pyeloplasty, we reviewed the records of 108 consecutive patients (age range 5 days to 18 years, median 1 year) who underwent pyeloplasty at our institution during a 6-year period. The routine preoperative evaluation consisted of a renal/bladder sonogram, furosemide renal scan (99mtechnetium-diethylenetriaminepentaacetic acid or 99mtechnetium-mercaptoacetyltriglycine) and voiding cystogram. No other imaging studies were obtained in 95 patients (88%). Other upper tract studies usually performed before referral included excretory urography in 9 cases and computerized tomography in 5. Preoperative Retrograde Pyelography was only performed in 1 symptomatic patient before referral to our institution. Surgical findings confirmed obstruction at the ureteropelvic junction in all patients. Undetected ureteral dilatation, which might suggest undiagnosed distal obstruction, was not encountered. After pye...

  • Pediatric pyeloplasty: is routine Retrograde Pyelography necessary?
    The Journal of urology, 1994
    Co-Authors: H G Rushton, Y Salem, A B Belman, M Majd
    Abstract:

    To evaluate the necessity for Retrograde Pyelography in the preoperative evaluation of children undergoing pyeloplasty, we reviewed the records of 108 consecutive patients (age range 5 days to 18 years, median 1 year) who underwent pyeloplasty at our institution during a 6-year period. The routine preoperative evaluation consisted of a renal/bladder sonogram, furosemide renal scan (99mtechnetium-diethylenetriaminepentaacetic acid or 99mtechnetium-mercaptoacetyltriglycine) and voiding cystogram. No other imaging studies were obtained in 95 patients (88%). Other upper tract studies usually performed before referral included excretory urography in 9 cases and computerized tomography in 5. Preoperative Retrograde Pyelography was only performed in 1 symptomatic patient before referral to our institution. Surgical findings confirmed obstruction at the ureteropelvic junction in all patients. Undetected ureteral dilatation, which might suggest undiagnosed distal obstruction, was not encountered. After pyeloplasty 2 patients were lost to followup, renal drainage improved in 104 (98%) and drainage failed to improve in 2 of whom 1 (0.9%) required reoperation. All patients who presented with symptomatic uretero-pelvic junction obstruction experienced postoperative resolution of the presenting complaints. Our series demonstrates that routine Retrograde Pyelography to define the level of obstruction is not necessary for successful primary pyeloplasty. In experienced hands and with careful attention to detail, the combination of renal/bladder sonography and diuretic renography can reliably exclude the possibility of distal obstruction in children with hydronephrosis before pyeloplasty.