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To the Editor:—
The diagnosis of intraductal lesions in the common duct during operation has been a difficult problem. During the past six years I have found a relatively easy method of accurate diagnosis and, since the method has been substantiated by examinations in 168 consecutive operations performed up to May 1943 as reported to the Surgical Section of the California Medical Association meeting on May 3, 1943, I feel that it should be presented for further consideration. An aqueous solution of iodine (hippuran) in quantities from 8 to 15 cc. is injected through a 24 or 26 gage needle inserted obliquely through the wall of the common duct. An aqueous solution is miscible with bile; therefore it is not necessary to withdraw an equal amount of bile before injection. The injection is made after the common duct has been exposed. A cassette is placed under the patient before the
Mentzer SH. IMMEDIATE CHOLANGIOGRAPHY. JAMA. 1945;127(8):482–483. doi:10.1001/jama.1945.02860080054022
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