Access disconnection systems and methods
First Claim
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1. An extracorporeal blood system comprising:
- an extracorporeal blood machine including an extracorporeal blood circuit;
an access device enabling the extracorporeal blood circuit to be connected to a patient;
a pair of electrical contacts configured to contact blood as the blood flows through the extracorporeal blood circuit; and
a controller configured to model a total impedance Z according to at least two lumped impedances including (i) a lumped impedance ZD due to components of the extracorporeal blood machine and (ii) a lumped impedance ZP due to access of the extracorporeal blood circuit to the patient.
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Abstract
Apparatuses, devices, systems and methods for detecting access disconnection are provided. In one embodiment, a medical fluid system includes (i) a medical fluid machine and (ii) a device operable with the medical fluid machine, the device configured to provide electrical contact with a medical fluid, the device including (a) a tube used during dialysis therapy through which the medical fluid can flow, and (b) a conductive element configured to self-sealingly pierce the tube, the conductive element having a first portion exposed to the medical fluid and a second portion external to the tube.
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Citations
9 Claims
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1. An extracorporeal blood system comprising:
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an extracorporeal blood machine including an extracorporeal blood circuit; an access device enabling the extracorporeal blood circuit to be connected to a patient; a pair of electrical contacts configured to contact blood as the blood flows through the extracorporeal blood circuit; and a controller configured to model a total impedance Z according to at least two lumped impedances including (i) a lumped impedance ZD due to components of the extracorporeal blood machine and (ii) a lumped impedance ZP due to access of the extracorporeal blood circuit to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification