On bedside urine-testing : a clinical guide to the observation of urine in the course of work / by Geo. Oliver.

Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: On bedside urine-testing : a clinical guide to the observation of urine in the course of work / by Geo. Oliver. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    122/272 (page 114)
    If now, however, the observer employs the test solutions, he will, in all probability, obtain results which differ from those produced by the test-papers, the re- action being much more pronounced, and, moreover, not clearing at all with heat. Experiment has shown me, that the cause of this disparity is to be found in the varying quantities of the reagents added to the volume of urine submitted to examination ; that when they exceed a certain proportion,—that uniformly sup- plied by the test-papers to 6olli of urine,— heat can no longer clear up the haziness, the excess of the mercuric salt preventing solution. I, therefore, regard the test- of the solution falls, and in the cold it greatly exceeds the original ainount. Heat will again disperse it as before. The characteristic feature of the reaction is the great in- crease of the opacity which follows the clearing up by heat; just, in fact, what occurs with normal urine, and also with urine which contains an excess of mucin. No doubt the observer, taking into account the highly muciparous character of the urine, will be surprised by the slightness of the reaction, after dropping in the test-papers; and he will, moreover, find that lo minims of it, when added to the 60 minim solution prepared from the test-papers (see p. 122), gives the faintest tinge of milkiness, which heat, far short of boiling, completely removes. If now a trace of albumin be communicated to the mucin-charged urine —as by adding a little albuminous urine-the test-papers will produce an opacity, which heat will clear up only to a certain degree ; that which remains over being due to the albumin.