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Robert L. Dickinson, M.D.
JAMA. 1930;95(4):286-287. doi:10.1001/jama.1930.02720040044026.
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To the Editor:  —The contraceptive pessary found in the bladder by Dr. Rudnick (The Journal, May 17, p. 1565) calls for a report on the probabilities of such an accident, since all of the fifty and more birth control clinics in this country are using this form of protection.There seems to be only one case like it in the literature—that of Lohnstein of Berlin (Deutsche med. Wchnschr. 18:854, 1892), in which the cap was pushed in a week previous to its detection. Its diameters were 5 and 6 mm.; that is, the spring had been partly deformed, whereas the roentgenogram in Rudnick's case shows an uninjured full circle said to be 3½ inches, or number 90, with a dome of 1½ inches, the extreme limit of size in these pessaries.Barnsby (Bull. Soc. d. chir. 21:288-291, 1905) reported that a girl, aged 18, introduced a flexible soft


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