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The mechanics of urine transport in the upper urinary tract: 1. The dynamics of the isolated bolus
Author(s) -
Griffiths Derek J.,
Notschaele Cyril
Publication year - 1983
Publication title -
neurourology and urodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 90
eISSN - 1520-6777
pISSN - 0733-2467
DOI - 10.1002/nau.1930020209
Subject(s) - bolus (digestion) , medicine , ureter , upper urinary tract , urinary system , mechanics , urology , surgery , physics
On the basis of theoretical and experimental results, a simple mechanical framework is developed in which the propagation of the isolated bolus can be understood. It is shown that the pressure in the bolus is determined primarily by the pressure needed to separate the walls of the collapsed ureter, and that the observed variations in the velocity of the leading edge can be accounted for by nonuniformity of the ureteric cross section.