MEASUREMENT OF ELASTICITY OF MALE URETHRAL MEATUS BY URINARY DROP SPECTROMETRY

被引:5
作者
STERLING, AM
GRIFFITHS, DJ
机构
[1] LEIDEN UNIV HOSP, DEPT UROL, LEIDEN, NETHERLANDS
[2] UNIV EXETER, DEPT PHYS, EXETER, ENGLAND
关键词
D O I
10.1159/000280068
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
The urinary stream breaks up into drops shortly after leaving the external meatus. For normal human males the frequency of the drops is related in a characteristic way to the flow rate [FR]. From this relation the elastic properties of an elastic constriction near the external meatus are calculated, using a theory of flow through distensible tubes. The elastic constriction behaves as if rigid at low FR, but distends elastically at FR above a critical value. This theoretical result is verified by observations of the stream emerging from a mechanical model, constructed with similar elastic properties. Functional meatal stenosis is associated with a lack of distensibility at the higher FR, which is reflected clinically in a changed relation between drop frequency and FR. Measurement of the relation, by the urinary drop spectrometer, offers a quick, non-invasive way of diagnosing this type of urethral obstruction.
引用
收藏
页码:321 / 331
页数:11
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