The SFV is an excellent conduit for vascular access, whether it is transposed or is part of a composite PTFE-SFV fistula. In this series, fistula infection was nonexistent, thrombosis rates were low, and clinical evidence of venous hypertension was minimal. The major impediment to unrestricted use of SFV in constructing AVFs is a high incidence of clinically significant postoperative ischemia requiring reoperation.

Improved patient selection and selective intraoperative femoral vein tapering eliminated remedial procedures to correct ischemia in patients undergoing tFV access. Patency rates were excellent despite the liberal use of vein tapering. Transposed FV access should be considered for good risk individuals undergoing their first lower extremity access.

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Preliminary work has shown that normal lungs have predictable CT patterns and density ranges. In emphysema, there are irregular zones of extremely low density as well as an overall low mean density. CT appears to have considerable potential for early detection of pulmonary emphysema and characterization of the degree of involvement. CT can also be useful in the study of physiological phenomena such as regional blood flow.