| Petersen's bag | An obsolete device consisting of a rubber bag introduced into the rectum and inflated to push up the bladder to facilitate suprapubic cystotomy. (05 Mar 2000) |
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| Petersen, C | <person> German surgeon, 1845-1908. See: Petersen's bag. (05 Mar 2000) |
| Smith-Petersen, Marius | <person> U.S. Surgeon, 1886-1953. See: Smith-Petersen nail. (05 Mar 2000) |
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| Smith-Petersen nail | A flanged nail for pinning a fracture of the neck of the femur. (05 Mar 2000) |