Venous needle dislodgement monitoring device

A venous needle dislodgement monitoring device, for monitoring for the presence of a needle or cannula to determine if it becomes dislodged. The dislodgement monitoring device comprises a temperature sensor 30, a heart rate sensor 40, and a controller with a transmitter. The temperature sensor and heart rate sensor are disposed on a wearable electronic device 10. The controller and transmitter are located within the wearable electronic device. The temperature sensor and heart rate sensor are in communication with the controller. The controller generates an alarm signal when a threshold value is reached based upon a temperature value measured by the temperature sensor and a heart rate value measured by heart rate sensor. Wherein the transmitter disposed for transmitting the alarm signal to one or more associated medical devices (50, Fig 2). The monitoring device may be provided in a system with the medical device, the medical device comprising needles (54, 58, Fig 2) and associated fluid lines (52, 56, Fig 2), and a computer (60, Fig 2) with a receiver (62, Fig 2) and transmitter (64, Fig 4). A method of detecting venous dislodgment using the system is also taught.