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In employing the Crile transfusion canula we sometimes encounter difficulty in telescoping the artery over the vein. The relatively small size of the artery makes it necessary at times to manipulate for a considerable length of time before we can successfully reunite the two. I have made certain changes in the Crile instrument which I think facilitate the operative procedure.
The modified transfusion canula consists of a ring which has the shape of a truncated cone and which is carried on a rather firm handle, both canula and handle being cut out of a single piece of German silver. A reference to the accompanying illustration will show that the canula is cleft lengthwise by a slit which makes it possible to alter permanently the diameter of the instrument and also to cause a temporary diminution in its size, if such be desired. The metal is made as thin as possible
BUERGER L. A MODIFIED CRILE TRANSFUSION CANULA. JAMA. 1908;LI(15):1233. doi:10.1001/jama.1908.25410150037002e
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