The surgery of the stomach : a handbook of diagnosis and treatment / by Herbert J. Paterson.

  • Paterson, Herbert J. (Herbert John), 1868-1940.
Date:
1914
Catalogue details

Licence: In copyright

Credit: The surgery of the stomach : a handbook of diagnosis and treatment / by Herbert J. Paterson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    422/446
    ! 324 SURGERY OF THE STOMACH test-tube, and a few drops of liquor ferri perchloridi added; this mixture is a deep amethyst blue. Enough distilled water is added to render the fluid transparent, and 5 c.c. of the resultmg solution are placed m a test-tube. To this a few drops of filtered gastric contents are added. If lactic acid be present, a canary yellow or greenish-yellow colour results. It is more dehcate to make the test for lactic acid, after extracting the gastric contents, with ether. The ether dis- solves the lactic acid, other substances bemg left behind. The ethereal solution is evaporated on a water bath, and the residue extracted with water and tested as described above. In the presence of lactic acid the solution turns green. Strauss' Test.—A more dehcate test is that of Strauss. If made with a special Strauss funnel the test is a very simple one. The funnel has a stop-cock at its lower end. Above the stop-cock two marks are engraved on the glass, one mark 5 c.c. and the other mark 25 c.c. above the stop- cock. At the upper end of the funnel is a glass stopper. To apply the test, filtered gastric contents are run into the funnel up to the 5 c.c. mark, and ether added up to the 25 c.c. mark. The glass stopper is replaced and the funnel is shaken vigorously. It is then allowed to stand until the ether has separated from the gastric contents. The stop- cock then is opened and the fluid allowed to run out slowly until the remaining fluid reaches to the 5 c.c. mark. The funnel is now fiUed up to the 25 c.c. mark with distilled water, and a few drops of tincture of iron chloride added. If lactic acid be present, the mixture, on being shaken, turns a deep or pale green, according to the amount of acid present. Gmelin's Test for Bile Pigment.—Ten cubic centimetres of fuming nitric acid are placed in a test-tube. By means of a pipette an equal quantity of filtered gastric contents is floated on the nitric acid. If bile pigment be present, a 1