The best and most modern methods of the examination of urine as required in medical practice / by W. Henry Kesteven.

  • Kesteven, W. Henry (William Henry)
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: The best and most modern methods of the examination of urine as required in medical practice / by W. Henry Kesteven. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    IO in cast-like bundles, if they are contained in casts, it may be argued that they have come from the kidney. The cre- nation of their edges is due to the action of the urine in which they have been steeped since their extravasation. It is therefore possible for them to acquire this appearance when they have been detained in the bladder in cases of retention, having escaped from the vessels in that organ. But in that case there will be other blood corpuscles present normal in shape from more recent extravasation, for it is not likely that only a few would escape and then the bleeding cease. The haemorrhage is pretty certain to be continuous in this locality. Chemically.—The presence of blood in the urine is demonstrated by the detecting therein of hoemo-globin. To test for this substance it is necessary to add to the urine in a test tube five drops of tincture of guaiacum and then to float upon it a small quantity of ozonic cether, at the line of junction of the two fluids, if there be any hoemo- globin present a blue tint will appear. Some white blotting paper soaked with the urine will show the same coloration on the addition of the cether and tinc- ture of guaiacum. Some resemblance to the colour thus produced is produced when there is iodide of potasseum present in the urine as is the case when patients are taking that drug. The genuine hoemo-globin blue is more purely blue, there is some yellow mingled with the blue in the other case, and the iodide colour is much less rapid in appearance. (3) SUGAR. In the Lancet (March 1st, 1884) Dr. Pavy published a method of testing urine for sugar, and of determining the amount of that substance present. The following description thereof is given in his own words : “The solution is made by dissolving 20.400 grammes of potassic sodic tartrate with the same amount of caustic potass, then adding a solution of 4.158 gramme of cupric sulphate. When this mixed solution is quite cold, add 300 cc. of strong solution of ammonia (.880), and with water, make up to one litre. Ten cubic centimetres of the above liquid is a convenient quantity to work with, and does not call for the employment of any appliance to obviate the inconvenience arising from the evolved ammonia as I found to be necessary when I first introduced the test, and used a larger amount for the analysis. By diluting the specimen to be examined to a greater extent, as much accuracy is attainable as with the employment of a larger amount of the test, and a less dilute liquid. In