Medical injection systems and methods related to user activated control devices

摘要

A control module for a medical injection system generates an injection control signal based on sensed internal pressure of a user activated control device, for example, in response to an applied external force that causes the sensed internal pressure to increase from a baseline pressure, and continues to sense the internal pressure of the device, following release of the applied external force, so that, if the sensed internal pressure drops below the baseline pressure, the control module may generate a notification. Thus, an operator of the system may monitor internal pressure of the control device for a drop below the baseline pressure, and then, if such a drop is detected, inspect the control device for leaks and reconnect, replace or repair the control device, or simply reconnect or replace the control device.

主权项

1. A method for setting up a user activated control device in a medical injection system, the control device having been coupled to a control module of the system via a connection between a tubing line of the control device and a control panel containing the control module, the tubing line being in fluid communication with an internal volume of the control device, the control module including a pressure sensor in fluid communication with the connected tubing line, wherein the internal volume of the control device, the tubing line, and the pressure sensor are included in a closed internal volume intended to prevent fluid from flowing out of the closed internal volume, and the method comprising:
applying an external force to an elastic portion of the control device, to compress the internal volume thereof from a first volume to a second volume, and holding the external force for a period of time, the applied external force increasing an internal pressure of the control device from an initial baseline pressure; monitoring the internal pressure of the control device during the period of time, the internal pressure being sensed by the pressure sensor of the control module; if the monitored internal pressure does not significantly drop during the period of time, establishing an injection control signal to correspond to the monitored internal pressure; releasing the applied external force to allow the elastic portion to rebound to the first volume while continuing to monitor the internal pressure; and if the internal pressure drops below the baseline pressure, after releasing the applied external force, inspecting the control device for leaks in the closed internal volume, wherein the baseline pressure is zero differential pressure with respect to atmospheric.