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To the Editor:
—In regard to the blood transfusion apparatus as described by Dr. L. L. Stanley in The Journal, March 6, 1920, p. 671, this modification may be made: namely, the stopcock may be substituted for the ball valve arrangement as described.A glass stopcock with a good sized bore may be substituted for each one of the ball valves, thus shutting off each of the two needles, at will, from the syringe. When the donor's blood is to be drawn, the stopcock leading to his needle is opened, while the one leading to the recipient's needle is closed. The syringe is filled by drawing out the plunger. The donor's stopcock is now closed and the recipient's stopcock opened, and the blood is immediately forced into the recipient's vein by pushing in the piston of the syringe. The advantages of this modification are:It is a relatively simple instrument
It is a relatively simple instrument
Greenhouse B. "BLOOD TRANSFUSION APPARATUS". JAMA. 1920;74(14):967. doi:10.1001/jama.1920.02620140041026