Vasc-Alert is an online software-as-a-service application (program) intended to alert dialysis center personnel of increased risk of access site stenosis for individual hemodialysis patients.  Vasc-Alert uses measurements routinely collected during dialysis treatment in a electronic medical record. Some of the data recorded is generated by a hemodialysis machine, such as pressure and flow rate. Vasc-Alert applies this data to a previously published algorithm called the Vascular Access Pressure Ratio Test (VAPRT) to these measurements.  The average VAPRT result for each treatment session is stored in a Vasc-Alert database.  Reports are issued by Vasc-Alert, listing patients with high readings on three consecutive treatments.  Hemodialysis center personnel can use the report as a tool to proactively monitor incipient stenosis and prompt proactive intervention to avoid site closure.The Vasc-Alert Online Application provides an easy and secure way to view information on your patients, download reports, and upload treatment run data to Vasc-Alert.  

The reports issued by Vasc-Alert should be considered only as prompts for the appropriate medical personnel to examine patients more closely using traditional methods such as physical examination of the access site, or angiogram.  The use of Vasc-Alert does not replace the need to monitor dialysis patients according to the standards already in place at your center.

Federal law restricts this device to sale by or on the order of a licensed health care practitioner.

United Kingdom distribution

Version 3.01

February 13, 2023

Download the Vasc-Alert User's Guide in PDF format