Examination of the urine; a manual for students and practitioners . of irregular shape,but sometimes in the form of long and transparent shreds,the ends of which taper or split in fine divisions, whichfade away imperceptibly. They are often covered withamorphous urates, and may be mistaken for casts. Theyare, however, flat and not cylindric; generally very muchnarrower than casts, and their granules can be dissolvedwith a little heat on the addition of acids or alkalis. Thepresence of these threads has no very marked clinicalsignificance unless there is an excessive amount of mucus,which indic
Examination of the urine; a manual for students and practitioners . of irregular shape,but sometimes in the form of long and transparent shreds,the ends of which taper or split in fine divisions, whichfade away imperceptibly. They are often covered withamorphous urates, and may be mistaken for casts. Theyare, however, flat and not cylindric; generally very muchnarrower than casts, and their granules can be dissolvedwith a little heat on the addition of acids or alkalis. Thepresence of these threads has no very marked clinicalsignificance unless there is an excessive amount of mucus,which indicates irritation or inflammation in some part ofthe genito-urinary tract. Mucin threads may be demon-strated by the addition of a little acetic acid and a littlesolution of iodin, potassium iodid, tartaric acid, or dilute PROSTATIC PLUGS 31I mineral acids, but an excess of the latter will redissolvethe mucin. Mucin threads may be found in urine withoutaddition of acids, being probably precipitated by the actionof acids formed in acid fermentation. The greater the. Fig. 69.—False casts (after Peyer). irritation in the genito-urinary tract, the more opaque,the thicker, and the more ropy becomes the mucus, andappears then in the form of clouds mixed with epithelialcells from the seat of the trouble. PROSTATIC PLUGS Prostatic plugs are large, colorless, or yellow moldsof the prostatic ducts (Fig. 70), cylindric, with roundedends, or of irregular shape. Their outlines are not sharply 312 EXAMINATION OF THE URINE defined, as they generally are found in clouds of mucus,but their chief characteristic is the fact that they have im-bedded in them or adherent to them spermatozoa andepithelial cells from the prostatic ducts. Their presenceindicates an inflammation of the prostate involving theducts, and they are said to occur in urines after massage Fig. 70.—Spermatozoa: At a are so-called Bottcher crystals; at 6, amy-loid bodies; at c, a prostatic plug (Jakob). of the prostate, but the
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