Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis

INTRODUCTION: Dilation of urinary tract occurs without the presence of obstruction. Diagnostic methods that depend on renal function may elicit mistaken diagnosis. Whitaker (1973) proposed the evaluation of urinary tract pressure submitted to constant flow. Other investigators proposed perfusion of...

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Main Authors: Patrícia Traballi de Carvalho Pegolo, Marcio Lopes Miranda, Sheila Kim, Antonio Gonçalves de Oliveira Filho, Leonardo Oliveira Reis, Joaquim Murray Bustorff Silva
Format: Article
Language:English
Published: Sociedade Brasileira de Urologia 2012-08-01
Series:International Brazilian Journal of Urology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382012000400003
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author Patrícia Traballi de Carvalho Pegolo
Marcio Lopes Miranda
Sheila Kim
Antonio Gonçalves de Oliveira Filho
Leonardo Oliveira Reis
Joaquim Murray Bustorff Silva
author_facet Patrícia Traballi de Carvalho Pegolo
Marcio Lopes Miranda
Sheila Kim
Antonio Gonçalves de Oliveira Filho
Leonardo Oliveira Reis
Joaquim Murray Bustorff Silva
author_sort Patrícia Traballi de Carvalho Pegolo
collection DOAJ
description INTRODUCTION: Dilation of urinary tract occurs without the presence of obstruction. Diagnostic methods that depend on renal function may elicit mistaken diagnosis. Whitaker (1973) proposed the evaluation of urinary tract pressure submitted to constant flow. Other investigators proposed perfusion of renal pelvis under controlled pressure, making the method more physiological and reproducible. The objective of the present study was to evaluate the results of the anterograde pressure measurement (APM) of the urinary tract of children with persistent hydronephrosis after surgery suspected to present persistent obstruction. MATERIALS AND METHODS: Along 12 years, 26 renal units with persistent hydronephrosis after surgery (12 PUJ and 14 VUJ) were submitted to evaluation of the renal tract pressure in order to decide the form of treatment. Previous radionuclide scans with DTPA, intravenous pyelographies and ultrasounds were considered undetermined in relation to obstruction in 10 occasions and obstructive in 16. APM was performed under radioscopy through renal pelvis puncture or previous stoma. Saline with methylene blue + iodine contrast was infused under constant pressure of 40 cm H2O to fill the urinary system. The ureteral opening pressure was measured following the opening of the system and stabilization of the water column. RESULTS: Among the 10 cases with undetermined previous diagnosis, APM was considered non-obstructive in two and those were treated clinically and eight were considered obstructive and were submitted to surgery. Among the 16 cases previously classified as obstructive, nine confirmed obstruction and were submitted to surgery. Seven cases were considered non-obstructive, and were treated clinically, with stable DMSA and hydronephrosis. CONCLUSIONS: APM avoided unnecessary surgery in one third of the cases and was important to treatment decision in 100%. We believe that this simple test is an excellent diagnostic tool when selectively applied mainly in the presence of functional deficit.
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spelling doaj.art-1f6d9042071c4cd382ec8bdd841526b82022-12-21T22:22:13ZengSociedade Brasileira de UrologiaInternational Brazilian Journal of Urology1677-55381677-61192012-08-0138444845510.1590/S1677-55382012000400003Antegrade pressure measurement of urinary tract in children with persistent hydronephrosisPatrícia Traballi de Carvalho PegoloMarcio Lopes MirandaSheila KimAntonio Gonçalves de Oliveira FilhoLeonardo Oliveira ReisJoaquim Murray Bustorff SilvaINTRODUCTION: Dilation of urinary tract occurs without the presence of obstruction. Diagnostic methods that depend on renal function may elicit mistaken diagnosis. Whitaker (1973) proposed the evaluation of urinary tract pressure submitted to constant flow. Other investigators proposed perfusion of renal pelvis under controlled pressure, making the method more physiological and reproducible. The objective of the present study was to evaluate the results of the anterograde pressure measurement (APM) of the urinary tract of children with persistent hydronephrosis after surgery suspected to present persistent obstruction. MATERIALS AND METHODS: Along 12 years, 26 renal units with persistent hydronephrosis after surgery (12 PUJ and 14 VUJ) were submitted to evaluation of the renal tract pressure in order to decide the form of treatment. Previous radionuclide scans with DTPA, intravenous pyelographies and ultrasounds were considered undetermined in relation to obstruction in 10 occasions and obstructive in 16. APM was performed under radioscopy through renal pelvis puncture or previous stoma. Saline with methylene blue + iodine contrast was infused under constant pressure of 40 cm H2O to fill the urinary system. The ureteral opening pressure was measured following the opening of the system and stabilization of the water column. RESULTS: Among the 10 cases with undetermined previous diagnosis, APM was considered non-obstructive in two and those were treated clinically and eight were considered obstructive and were submitted to surgery. Among the 16 cases previously classified as obstructive, nine confirmed obstruction and were submitted to surgery. Seven cases were considered non-obstructive, and were treated clinically, with stable DMSA and hydronephrosis. CONCLUSIONS: APM avoided unnecessary surgery in one third of the cases and was important to treatment decision in 100%. We believe that this simple test is an excellent diagnostic tool when selectively applied mainly in the presence of functional deficit.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382012000400003HydronephrosisKidneyPyonephrosisUrinary TractWhitaker testobstructionrenal pelvispercutaneousfunctional deficit
spellingShingle Patrícia Traballi de Carvalho Pegolo
Marcio Lopes Miranda
Sheila Kim
Antonio Gonçalves de Oliveira Filho
Leonardo Oliveira Reis
Joaquim Murray Bustorff Silva
Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
International Brazilian Journal of Urology
Hydronephrosis
Kidney
Pyonephrosis
Urinary Tract
Whitaker test
obstruction
renal pelvis
percutaneous
functional deficit
title Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
title_full Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
title_fullStr Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
title_full_unstemmed Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
title_short Antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
title_sort antegrade pressure measurement of urinary tract in children with persistent hydronephrosis
topic Hydronephrosis
Kidney
Pyonephrosis
Urinary Tract
Whitaker test
obstruction
renal pelvis
percutaneous
functional deficit
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382012000400003
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