APPARATUS AND METHOD FOR DETECTING DISCONNECTION OF AN INTRAVASCULAR ACCESS DEVICE
摘要
An apparatus and method are disclosed for detecting the disconnection of a vascular access device such as a needle, cannula or catheter from a blood vessel or vascular graft segment. A pair of electrodes is placed in direct contact with fluid or blood in fluid communication with the vascular segment. In one embodiment, the electrodes are incorporated into a pair of connectors connecting arterial and venous catheters to arterial and venous tubes leading to and from an extracorporeal blood flow apparatus. Wires leading from the electrodes to a detecting circuit can be incorporated into a pair of double lumen arterial and venous tubes connecting the blood flow apparatus to the blood vessel or vascular graft. The detecting circuit is configured to provide a low-voltage alternating current signal to the electrodes to measure the electrical resistance between the electrodes, minimizing both the duration and amount of current being delivered. Detection of an increase in electrical resistance between the electrodes exceeding a pre-detepnined threshold value may be used to indicate a possible disconnection of the vascular access device.
申请公布号
WO2011053810(A3)
申请公布日期
2011.06.30
申请号
WO2010US54772
申请日期
2010.10.29
申请人
DEKA PRODUCTS LIMITED PARTNERSHIP;WILT, MICHAEL, J.;SACHS, JASON, M.;GRANT, KEVIN, L.
发明人
WILT, MICHAEL, J.;SACHS, JASON, M.;GRANT, KEVIN, L.