Traumatic kidney rupture in hydronephrosis.
The hydrostatic pressure, intrapelvic volume, and specific elasticity and strength of strips of tissue from the parenchyma and the pelvis of eight hydronephrotic kidneys were investigated and compared with the tissue characteristics of the pelvis of four control kidneys. Hydronephorsis manifested itself by a sixfold reduction of tissue strength, and dynamically by a ninefold reduction of the energy absorptive capacity of the parenchyma as compared with the pelvis. Its further response to trauma appeared to be influenced by internal pressure, the law of mass variation, and the energy absorptive capacity of surrounding anatomical structures. The vulnerability of the hydronephrotic kidney in situ depends on its volume and topography, the parenchyma being the part that may be regarded as the site most predisposed to rupture.
D001696:Biomechanical Phenomena; D004548:Elasticity; D006801:Humans; D006869:Hydronephrosis / Q000150:complications* / Q000503:physiopathology; D006874:Hydrostatic Pressure; D007668:Kidney / Q000293:injuries*; D007682:Kidney Pelvis / Q000503:physiopathology; D012421:Rupture