I have taken my idea of the main piece of my apparatus for blood transfusion from a 10 c.c. ampule, containing sodium citrate in salt solution, issued with a transfusion set to the American Expeditionary Forces in France.
This ampule I have enlarged fifty times, bringing it up to a capacity of 500 c.c. Such an ampule I found commonly used in France for preserving and administering prepared sterile salt solution. I have modified this ampule somewhat, and have added two rubber tubes about 6 inches long, with a glass mouth-piece in one tube and a needle in the other. The apparatus is then complete.
The ampule is made of thick glass, and both ends are drawn out into tubes. One end is left straight and the other is bent into a U curve. The extreme ends are flared slightly, and half an inch from the ends are apparently constricted