US 9,808,586 B2
Electrical safety methods, devices, and systems for medical treatment devices
Yakov Kogan, Bedford, MA (US)
Assigned to NXSTAGE MEDICAL, INC., Lawrence, MA (US)
Filed by NXSTAGE MEDICAL, INC., Lawrence, MA (US)
Filed on Mar. 22, 2017, as Appl. No. 15/466,770.
Application 15/466,770 is a continuation of application No. 14/123,066, granted, now 9,636,454, previously published as PCT/US2012/041740, filed on Jun. 8, 2012.
Claims priority of provisional application 61/590,409, filed on Jan. 25, 2012.
Claims priority of provisional application 61/494,770, filed on Jun. 8, 2011.
Prior Publication US 2017/0189626 A1, Jul. 6, 2017
Int. Cl. A61M 5/50 (2006.01); A61M 1/14 (2006.01); G05B 9/02 (2006.01)
CPC A61M 5/5086 (2013.01) [A61M 1/14 (2013.01); G05B 9/02 (2013.01); A61M 2205/0233 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for protecting a patient from an electrical source of a treatment device, comprising:
connecting the patient to a treatment device by a fluid circuit in which a leakage current is induced by capacitive and/or inductive coupling of the fluid circuit with the treatment device;
providing a conductive element adjacent the fluid circuit such that it is capacitively coupled to the fluid circuit, wherein the conductive element is electrically isolated from a fluid carried by said fluid circuit and the fluid carried by the fluid circuit is conductive;
inducing a voltage in said conductive element and detecting a magnitude of the voltage which is responsive to the current induced by said capacitive and/or inductive coupling; and
interrupting a normal operation of the treatment device effective to reduce said leakage current in response to a detected magnitude of said voltage.