Detecting disease and designing treatment. Duplex and the diagnosis of diseased leg vessels

In hospital Z, a Dutch university hospital, a new protocol for the diagnosis of vascular patients has been introduced. It requires vascular surgeons to rely sometimes on a non‐invasive diagnostic technique, called duplex, in place of a previously used invasive one, called angiography. This article is a multivocal account of the protocol's introduction. It focuses on the intricate ways in which two aspects of diagnosis, the detection of disease and the design of treatment, relate.