| Pressure Transmission Through Ureteric Stents: a Novel in Vivo Human Study. | |
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MedLine Citation:
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PMID: 22245299 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: To document, in an in vivo study, the pressure transmission from the urinary bladder to the upper tract through ureteric stents in human patients. Stents have acquired special importance in the urological armamentarium. Flank pain and hydronephrosis are associated with stenting in 50% and 18% of cases, respectively. Pressure transmission from urinary bladder to the upper tract through the stent is the logical explanation for loin pain and hydronephrosis. METHODS: This study was conducted in a prospective manner. We did not select patients or modify their management; instead, we studied patients who, during the course of urological management of some upper tract disease, are left with both a ureteric stent and a nephrostomy tube. Twenty patients fulfilled our criteria. After written consent, a pressure-flow study was done monitoring pressure changes in the renal pelvis during different phases of bladder filling in sitting and recumbent positions. RESULTS: Pressure-flow curves showed almost equal transmission of pressure from the bladder to the renal pelvis throughout all phases of bladder filling and emptying. Any voluntary and involuntary rise of pressure in the bladder was instantly and almost equally transmitted to the renal pelvis. A subgroup of patients with infravesical obstruction resulting from benign prostatic hyperplasia also showed equal transmission of the elevated intravesical pressure during voiding to the renal pelvis. CONCLUSION: Pressure from the lower urinary tract is transmitted to the upper tract through the stent, posing a threat to the renal parenchyma and function. Stent placement, when indicated, should be used for the shortest period possible, in sterile urine. |
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Authors:
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Wael M Sameh; Ahmed Abulfotooh Eid |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-12 |
Journal Detail:
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Title: Urology Volume: - ISSN: 1527-9995 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0366151 Medline TA: Urology Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Urology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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