Patent ID: 6716193
Filing Date: 2004-04-06
Classification: A61M

Abstract:
A device for injecting liquid under pressure to a patient, the device comprising:means for pumping the liquid, a length of tubing extending from the pumping means to the patient; a regulation system located on the length of tubing; a first occlusion system located on the length of tubing downstream of the regulation system, the first occlusion system and the regulation system defining an intermediate segment having an intermediate pressure, a segment of tubing downstream of the first occlusion system having a downstream pressure, wherein the intermediate pressure, in the absence of injection to the patient, is greater than the downstream pressure to direct leakage of liquid from the first occlusion system downstream toward the patient; a first pressure sensor connected to the intermediate segment which measures any drop in the intermediate pressure in the absence of injection to the patient to detect leakage from the intermediate segment, the first pressure sensor having an output indicative of leakage from the intermediate segment, said output being operative in the absence of injection to the patient; means responsive to the output of the first pressure sensor for assisting in prevention of contamination of components upstream of the first occlusion system; and a disconnection system situated on the intermediate segment, said disconnection system comprising a boundary between a piece of tubing downstream therefrom for single use and a piece of tubing upstream therefrom for multiple use, wherein said disconnection system further comprises means for occluding at least one piece of the tubing that is activated prior to disconnection.