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Drawing Blood for Transfusion

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When the donor’s arm has been congested by gripping it above the elbow, or better by the application of a tourniquet drawn to the requisite degree of tightness, a suitable vein, usually the median basilic, is chosen. The area of puncture is washed with ether and a very small quantity, 2 to 3 minims, of 2 per cent. novocain is introduced over the vein with a hypodermic syringe. If a larger quantity is used, the vein may become obscured, but this small amount may be dispersed by a few moments’ pressure with the finger, and is usually enough to anæsthetize the very small area of skin that is to be operated upon. A tiny cut in the skin is then made with the point of a scalpel, and the needle is pushed through into the vein.

Author
Blood Transfusion
By Geoffrey Keynes
Published in 1922
Available from gutenberg.org
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