Document Detail


Ultrasonic velocities of concentric laminated uric acid stones.
MedLine Citation:
PMID:  8701545     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In concentric laminated uric acid samples two different sound velocities are observed with very different values, the one in the organic matrix varies from 670 to 1170 m s(-1), the other in the crystalline layers between 3200 and 5300 m s(-1). This large difference illustrates the importance of the internal stone structure on the fracture behaviour of urinary stones and reveals the weakness of the actual disintegration models, attributing the destructive effect of shock waves on the differences in acoustical impedance at the water/stone interface and not on the differences in acoustical impedance at the matrix/crystalline interfaces inside the urinary calculus.
Authors:
G Pittomvils; J P Lafaut; H Vandeursen; R Boving; L Baert; M Wevers
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasonics     Volume:  34     ISSN:  0041-624X     ISO Abbreviation:  Ultrasonics     Publication Date:  1996 Jun 
Date Detail:
Created Date:  1996-09-04     Completed Date:  1996-09-04     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0050452     Medline TA:  Ultrasonics     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  571-4     Citation Subset:  IM    
Affiliation:
K.U. Leuven, Department of MTM, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Acoustics
Crystallography
Humans
Lithotripsy
Transducers
Ultrasonics*
Uric Acid / chemistry*
Urinary Calculi / chemistry*,  therapy
Water
Chemical
Reg. No./Substance:
69-93-2/Uric Acid; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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