File:Clinical lectures on the principles and practice of medicine (1874) (14597016780).jpg

Identifier: clinicallectures1874benn (find matches)
Title: Clinical lectures on the principles and practice of medicine
Year: 1874 (1870s)
Authors: Bennett, John Hughes, 1812-1875
Subjects: Medicine Medicine
Publisher: New York : Wood
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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W Fig. 380. Fig. 381. constitution. In size they range from that of a millet-seed or smaller grains Fig. 376. External view of a remarkable renal calculus, with projections on allsides of it but one, impacted in the pelvis of the kidney. Fig. 377. Section of the same calculus, with nucleus of uric acid and oxalate oflime. Fig. 378. Calculus with lithic acid nucleus, surrounded by oxalate of lime, andcovered externally with laminae of lithic acid.—(Syme). Fig. 379. Triangular formed calculus of lithic acid deposited round a phosphaticnucleus at one corner.—(Syme). Fig. 380. Oval calculus of lithic acid, having a lithic acid nucleus, surrounded byoxalate of lime —(IAston). Fig. 381. Oval calculus of uric acid.—(Liston). Real size. CONCRETIONS. 277 (known under the name of gravel), which may pass along the urethra, tothat of a body weighing several ounces, and occupying nearly the wholebladder. In form they may be round, oval, flattened, irregular or nodu-
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Fig. 384. lated, and in chemical constitution may consist of phosphate of lime,triple phosphate of ammonia and magnesia, uric acid, oxalate of lime, orzanthic oxide. Not unfrequently in one calculus may be observed de-posits of varying chemical compositions, round a central nucleus, indi-cating the salts predominant in the urine during the period of its forma-tion (Figs. 378 to 384). One of the most remarkable circumstances connected with vesicalcalculi is, that the nucleus may be composed, not only of various kindsof salts or of fragments of other calculi, but even of foreign substanceswhich have been introduced from without. Thus, various rounded bodiesthrust down the urethra, may form thecentres of these concretions. Fig. 385represents a piece of slate pencil as thenucleus of \ phosphatic concretion. Mr.Svme removed it by the operation oflithotomy, and the man confessed hehad introduced the foreign body him-self, which had slipped from his fingers, !Fi£r 385 and entered the bladde

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