The diagnosis of disease / by J. Porter Parkinson.

  • Parkinson, J. Porter.
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: The diagnosis of disease / by J. Porter Parkinson. Source: Wellcome Collection.

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    increase in size ; the long bones become thicker, but not longer, while those of the legs show marked bending m the direction of their natm-al cm'vatm-e. The disease is very chronic, bone after bone becoming affected; but intervals of arrest of the disease occur, followed by fresh intervals of pam and enlargement. ACROMEGALY is an uncommon disease affecting adults, usually males. The hands and feet enlarge, as do the bones of the face, especially the lower jaw. The enlargement is due to growth of both bones and subcutaneous tissues. The tongue is sometimes also en- larged. Frequently there is also impairment of vision, due to double temporal hemianopia. CHAPTER X. DISEASES OF THE BLOOD. Examination of the Blood. As a preliminary, the tmt of the skin and mucous membranes as of the lips and conjunctivffi, should be noted. After placing a bandage round a finger, it may be pricked, and the blood examined. (a) Colour may be pale in anaemias, look as if mixed with milk in leuchfemia, bright pink in poisoning by carbon monoxide, or chocolate-coloured in poisoning by nitro-benzole. (h) Number of corpuscles may be estimated by Gower's Htemocytometer. Five cm. of blood are measured by a pipette, and mixed with 995 em. of normal saline solution ; a drop of this is placed on a shde ruled with cross-lines, distant from each other O'l millimetre, the coll of the slide being 02 of 1 mm. deep ; the cell is covered by a cover-glass, and the number of red and white corpuscles counted in 10 squares; this, multiplied by 1,000, givcs^the number in 1 cubic milli- metre of blood. The normal average per cubic millimetre is 5,000,000 in males, and 4,500,000 in females, and of white corpuscles there should be 1 to each 300 red, except after a meal, when the white corpuscles may be much increased in number.