Method and device for detecting the detachment of the venous needle from a patient during dialysis
AssigneeGambro Lundia AB
InventorsFrancesco Alberto Paolini, Carlo Alberto Lodi, Massimo Fava
Life of this patent
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Abstract
A method of detecting the detachment of the venous needle from a patient during an extracorporeal blood treatment in a dialysis machine having an extracorporeal blood circuit provided with an arterial branch and a venous branch. The arterial pressure (Pa) is measured in the arterial branch and the venous pressure (Pv) is measured in the venous branch, and the determination is made of whether or not decreases of the arterial pressures (Pa) and venous pressures (Pv) are occurring during the dialysis treatment in normal conditions.
Claims18
Method of detecting the detachment of the venous needle (13) from a patient (P) during an extracorporeal blood treatment in a dialysis machine (1) having an extracorporeal blood circuit (2) comprising an arterial branch (8) and a venous branch (10), the method comprising the steps of measuring the arterial pressure (Pa) in the arterial branch (8) and the venous pressure (Pv) in the venous branch (10), and determining whether or not decreases of the arterial pressures (Pa) and venous pressures (Pv) are occurring during the dialysis treatment in normal conditions.
Device for detecting the detachment of the venous needle (13) from a patient (P) during an extracorporeal blood treatment in a dialysis machine (1) having an extracorporeal blood circuit (2) comprising an arterial branch (8) and a venous branch (10), the device (14) being characterized in that it comprises pressure detectors (16, 17) for measuring the arterial pressure (Pa) in the arterial branch (8) and the venous pressure (Pv) in the venous branch (10), and a control unit (15) for determining whether or not decreases of the arterial pressures (Pa) and venous pressures (Pv) are occurring during the dialysis treatment in normal conditions.
Dependencies are inferred from the claim text.