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Suggested standards for reports dealing with lower extremity ischemia
Robert B. Rutherford, M.D. (Chairman), D.Preston Flanigan, M.D., Sushil K. Gupta, M.D., K.Wayne Johnston, M.D., Allastair Karmody, M.D., Anthony D. Whittemore, M.D., J.Dennis Baker, M.D., Calvin B. Ernst, M.D., Crawford Jamieson, M.D., Shanti Mehta, M.S. Journal of Vascular Surgery Volume 4, Issue 1, Pages (July 1986) DOI: / (86) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
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Fig. 1 Acceptable ways of graphically presenting the life-table data recorded in Table III. A, Numbers at risk at beginning of each period are indicated. Cumulative patency rate is indicated by stepped rather than curved line, and line is interrupted beyond point at which standard error exceeds 10%. B, Standard errors are also graphically shown. This method of display may be preferable if two patency curves are being compared in the same figure. Journal of Vascular Surgery 1986 4, 80-94DOI: ( / (86) ) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
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Fig. 2 A, Bolder numbers indicate value, out of possible total of 3, assigned to each vessel; numbers in finer print indicate values assigned to varying degrees of occlusion (Table IV). B, Runoff resistance values are calculated as follows for grafts entering the three levels indicated: Level A, superficial femoral = 2 × 3; profunda femoris = 1 × 0; total = = 7. Level B, distal popliteal blind segment = 3 × = 10. Level C, anterior tibial = 2 × 0; arch = 1 × 0; total = = 1. Journal of Vascular Surgery 1986 4, 80-94DOI: ( / (86) ) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
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Fig. 3 In each of three graft configurations (A-C), individual runoff values for right and left limbs are 7 and 4, respectively. Values for aortobifemoral stem (A), entire right axillofemoral graft (B), and proximal axillofemoral stem (C) are all 2.5 (1/R = 1/4 + 1/7 = 11/28 = 1/2.5). However, distal axillofemoral limb (C) has runoff resistance value of 7.D shows a sequential bypass where resistance values of proximal and distal limbs are 10 and 1, respectively. Combined they give a resistance value for proximal stem of 0.9 (1/R = 10/10 + 1/10 = 11/10 = 1/0.9). Journal of Vascular Surgery 1986 4, 80-94DOI: ( / (86) ) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
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