Two chronic problems currently affect hospital administration in the US: 1) monitoring patients' vital signs to ensure their safety, and 2) managing staff workload. This E-Team is looking to solve both problems by developing the Aid Network (AID-N), a wireless patient monitoring system for hospitals. AID-N consists of patent-pending low-cost wireless medical sensors, called eTags, that automate the process of monitoring vital signs. The eTags continuously transmit patient vital signs to the provider's computer (a handheld PDA style device), and generates an alarm when a patient's condition deteriorates. Beyond improving patient safety, this technology could relieve some of the workload of the medical team.