Two-lens sample

The two-glass sample was developed around 1800 by the British urologist Henry Thompson and is an orientational examination of the urine . It provides information on the localization of an existing urinary tract infection or gonorrhea ( gonorrhea ) in men. The urine drained by the patient is divided into two portions when urinating and collected separately in two glasses. The urine obtained in this way is held in front of a light source and assessed. Normal urine is clear. More pronounced deposits and opacities are pathological and require a more detailed investigation of the cause.

Cloudy urine can be caused by pus-forming white blood cells ( leukocytes ) or minerals. It should be noted that they also occur after a vegetable diet.

A cloudy portion of urine collected in the first glass indicates inflammation of the anterior urethra ( anterior urethritis ), a cloudy urine portion collected in the second glass indicates inflammation of the posterior urethra. In the case of male gonorrhea, it can be assumed in the first case that the infection was less than three weeks ago.

Knowing the progression of gonorrhea is important for making a disease prognosis. For anatomical reasons, the urinary system in men becomes affected first and the genital system only after about three weeks. By recognizing the disease in good time and treating it, any possible sterility as a consequence of the disease can be prevented.

Individual evidence

1. ↑ Barbara I. Tshisuaka: Thompson, Sir Henry. In: Werner E. Gerabek , Bernhard D. Haage, Gundolf Keil , Wolfgang Wegner (eds.): Enzyklopädie Medizingeschichte. De Gruyter, Berlin / New York 2005, ISBN 3-11-015714-4 , pp. 1396 f.
2. ^ Pschyrembel . 256th edition. de Gruyter Verlag, Berlin 1991, ISBN 3-11-017621-1 .

This article is about a health issue. It is not used for self-diagnosis and does not replace a diagnosis by a doctor. Please note the information on health issues !