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[The jet phenomenon in the bladder (author's transl)]
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|March 1, 1978
Summary
The urine jet entering the bladder is a visible phenomenon explained by kinetic impulse. This physiological process occurs under specific flow conditions, aiding in diagnostic interpretations.
Area of Science:
- Urology
- Radiology
- Fluid Dynamics
Background:
- The entry of urine into the bladder can create a visible jet phenomenon.
- Understanding this phenomenon is important for diagnostic interpretations in urology and radiology.
Purpose of the Study:
- To illustrate the jet phenomenon during urine entry into the bladder using urograms.
- To discuss the diagnostic significance of the urine jet.
- To explore the physiological conditions under which this phenomenon occurs.
Main Methods:
- Illustration of the jet phenomenon using patient urograms.
- Experimental modeling to determine the kinetic impulse and flow conditions for jet visibility.
- Theoretical considerations of fluid dynamics and physiological parameters.
Main Results:
- The jet phenomenon is determined by kinetic impulse and specific flow conditions at the ureteral orifice.
- For a 1:10 contrast medium and water mixture, the jet is visible when central flow velocity drops to approximately 0.073 m/s.
- The findings suggest the jet can be produced under physiological conditions in humans.
Conclusions:
- The urine jet phenomenon observed during bladder filling is a physiologically reproducible event.
- Diagnostic interpretation of urograms can benefit from understanding the dynamics of the urine jet.
- Kinetic impulse and flow dynamics are key factors in the formation of the urine jet.