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In performing splanchnic anesthesia of Braun according to the Finsterer method, I found in one case some difficulty after locating the point for injection; the needle engaged the rubber covering of the finger and had to be withdrawn, the glove removed, and an attempt made again to locate the spot with the bare finger. In order to avoid this break in surgical technic, that is, to apply the splanchnic anesthesia without removal of the rubber glove, I had an instrument made which facilitates the introduction of the needle for the diffusion of the anaesthetic solution into the retroperitoneal space in which the splanchnics lie. The instrument consists of a grooved director, on one end of which is fastened a three-quarter pliable metal ring. This ring with director is placed over the tip of the finger used to locate the point at which the needle is to be introduced into the
Burke J. A NEW INSTRUMENT IN SPLANCHNIC ANESTHESIA. JAMA. 1924;82(10):790. doi:10.1001/jama.1924.26520360003010d