Figure 1.

Screenshot from Cerner computerized physician order entry (CPOE) ischemic stroke admission order set. This order set was designed to comply with national performance measures, such as the administration of thrombolytic therapy within 180 minutes of patients’ arrival. The blue circles with “X” in the middle represent “hardstops,” meaning the physician must fill out these specific fields before signing and activating the order set. To meet the relevant time cutoff, physicians must enter the “hours since last seen normal,” with the computer then calculating whether thrombolysis is indicated.