This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
1. A ONE MAN CLOT PROOF TRANSFUSION APPARATUS
In working more or less constantly during the past year with blood transfusion by the citrate method, we have found numerous pitfalls and have tried to simplify the apparatus, eliminating chances of failure.The principal difficulty has been to use a needle small enough so that one trial is enough to get well into the vein and still prevent clotting long enough to get the desired amount of blood. A 17-gage needle (g), preferably platinum, is large enough and causes the donor no marked discomfort. However, as the blood reaches the tube leading to the container there is a slowing of the stream because of the large bore of the tube compared with that of the needle. The walls of this tubing soon become coated with blood cells and a clot filling the lumen results, often before the desired amount of blood
HARTMAN FW. NEW METHODS FOR BLOOD TRANSFUSION AND SERUM THERAPY. JAMA. 1918;71(20):1658–1659. doi:10.1001/jama.1918.26020460009010b