WEARABLE CARDIAC DEFIBRILLATION SYSTEM WITH ELECTRODE ASSEMBLIES HAVING PILLOW STRUCTURE
In embodiments, a wearable cardiac defibrillation (WCD) system includes one or more flexible ECG electrodes. The WCD system may have a support structure that is dimensioned to be worn so as to press the electrodes towards the body of the patient. The electrodes may be made from appropriate material so as to flex in order to match a contour of the body of the patient. An advantage over the prior art is that the flexible electrode may make better electrical contact with the patient's skin, and therefore provide a better ECG signal for the WCD system to perform its diagnosis.
1 . An electrode assembly configured for use with a Wearable Cardiac Defibrillator (WCD) system, the WCD system including a support structure configured to exert nonzero pressure to a body of a patient while worn by the patient, an electronics module, and a signal conductor having a first end terminating in a first electro-mechanical connector and a second end configured to be coupled to the electronics module, the electrode assembly comprising:
an electrode configured to be communicatively coupled to the electronics module;
a pillow structure coupled to the electrode;
wherein the electrode assembly is configured to be coupled to the support structure so that the electrode assembly is placed against the body due to the nonzero pressure when the support structure is worn, and
wherein the pillow structure is flexible so as to acquire a first shape due to the electrode assembly being subjected to the nonzero pressure, and a second shape different from the first shape when the pillow structure is not being subjected to the nonzero pressure.
2 . The electrode assembly of claim 1 , wherein the first electro-mechanical connector includes a snap mechanical contact.
3 . The electrode assembly of claim 1 , wherein the electrode has a main surface with an average thickness measured in a direction perpendicular to the main surface of less than 4 mm.
4 . The electrode assembly of claim 1 , wherein the electrode includes a metal foil.
5 . The electrode assembly of claim 1 , wherein the electrode assembly is configured to be removably attached to the support structure.
6 . The electrode assembly of claim 1 , wherein the first shape is a squeezed version of the second shape.
7 . The electrode assembly of claim 1 , wherein the pillow structure includes a piece of foam.
8 . The electrode assembly of claim 1 , wherein the pillow structure includes a pouch filled with a fluid.
9 . The electrode assembly of claim 1 , wherein the pillow structure includes a pouch filled with air.
10 . The electrode assembly of claim 1 , further comprising:
a flexible inner conductor that flexes when the pillow structure transitions from the first shape to the second shape, and
wherein the signal terminal is electrically coupled to the electrode via the flexible inner conductor.
11 . A Wearable Cardiac Defibrillator (WCD) system, comprising:
a support structure comprising a pillow structure, the support structure configured to exert nonzero pressure to a body of a patient while worn by the patient;
an electronics module;
a signal conductor having a first end terminating in a first electro-mechanical connector and a second end configured to be coupled to the electronics module; and
an electrode assembly comprising an electrode configured to be communicatively coupled to the electronics module, wherein the electrode assembly is configured to be coupled to the support structure so that the electrode is aligned with the pillow structure and placed against the body due to the nonzero pressure when the support structure is worn, and
wherein the pillow structure is flexible so as to acquire a first shape due to the electrode assembly being subjected to the nonzero pressure, and a second shape different from the first shape when the pillow structure is not being subjected to the nonzero pressure.
12 . The WCD system of claim 11 , wherein the first electro-mechanical connector includes a snap mechanical contact.
13 . The WCD system of claim 11 , wherein the electrode has a main surface with an average thickness measured in a direction perpendicular to the main surface of less than 4 mm.
14 . The WCD system of claim 11 , wherein the electrode includes a metal foil.
15 . The WCD system of claim 11 , wherein the electrode assembly is configured to be removably attached to the support structure.
16 . The WCD system of claim 11 , wherein the first shape is a squeezed version of the second shape.
17 . The WCD system of claim 11 , wherein the pillow structure includes a piece of foam.
18 . The WCD system of claim 11 , wherein the pillow structure includes a pouch filled with a fluid.
19 . The WCD system of claim 11 , wherein the pillow structure includes a pouch filled with air.
20 . The WCD system of claim 11 , further comprising:
a flexible inner conductor that flexes when the pillow structure transitions from the first shape to the second shape, and
wherein the signal terminal is electrically coupled to the electrode via the flexible inner conductor.