RT Journal A1 Harbin RM T1 A cofferdam intestinal retractor JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1919 FD May 31 VO 72 IS 22 SP 1614 OP 1614 DO 10.1001/jama.1919.26110220003011d UL http://dx.doi.org/10.1001/jama.1919.26110220003011d AB This inexpensive retractor is made in the form of a truncated cone by sewing a section of stocking around pliable copper rings. A dozen or more of different sizes will be found useful in the isolation of infected areas, in reaching inaccessible sources of hemorrhage and facilitating suturing without heavy packing and in searching for lesions causing intestinal obstruction.