Summary
With the momentum flux apparatus, momentum flux in the voided urinary stream at maximum flow rate was measured in 117 normal males. A normal area of momentum flux related to maximum flow rate has been delineated. The between-person variation of momentum flux was statistically significantly larger than the withinperson variation evaluated from repeated voidings from two normal persons. These direct measurements of momentum flux have been compared with those predicted from results obtained with the drop spectrometer. The agreement between the two types of measurements is judged satisfactory.
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References
Griffiths, D. J.: Hydrodynamics of male micturition — II. Measurements of stream parameters and urethral elasticity, Medical and Biological Engineering 9, 589 (1971)
Meyhoff, H. H., Griffiths, D. J., Nordling, J., Hald, T.: Accuracy and interpretation of results from the DISA momentum flux meter. Urological Research 8, 37 (1980)
Sterling, A. M., Griffiths, D. J.: Measurement of the elasticity of the male urethral meatus by urinary drop spectrometry. Urologia Internationalis 31, 321 (1976)
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Meyhoff, H.H., Griffiths, D.J., Nordling, J. et al. Momentum flux values at maximum flow rate in normal males. Urol. Res. 8, 67–70 (1980). https://doi.org/10.1007/BF00271431
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DOI: https://doi.org/10.1007/BF00271431