The accompanying photograph shows a new kind of tourniquet which has several distinct advantages over the types now in use, and which has been approved by all who have used it. The tourniquet consists of a convenient length of 1 inch (2.5 cm.) black cotton or silk elastic fitted with a broad metal hook at one end and a sliding eye, adjustable to the circumference of the extremity, in which the hook engages. The loop thus formed is easily tightened by pulling on the free end of the elastic or is loosened by the force of its own elasticity when the tab on the sliding eye is raised. These operations are easily performed with one hand so that the other is free to palpate the pulse or vein. When injecting solutions into a vein, the tourniquet may be released instantly by a single simple twist of the wrist, a feature
Straub ME, MacNeal HP. A TOURNIQUET FOR INTRAVENOUS PROCEDURES. Arch Derm Syphilol. 1934;29(5):717. doi:10.1001/archderm.1934.01460110075012
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