Wearable monitoring and treatment device

• US 9,131,901 B2
• Filed: 01/22/2014
• Issued: 09/15/2015
• Est. Priority Date: 09/01/2011
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Volpe, Shane S., Kaib, Thomas E.
• Primary Examiner(s): KAHELIN, MICHAEL WILLIAM
• Application Number:
  US14/161,017
• Publication Number:
  US 20140206974A1
• Time in Patent Office: 601 Days
• US Class Current: 1/1
• CPC Class Codes: A41D 13/1281 with incorporated means for medical monitoring
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/1135 by monitoring thoracic expansion
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/6804 Garments; Clothes
• CPC Class Codes: A61B 5/6805 Vests
• CPC Class Codes: A61B 5/6844 Monitoring or controlling distance between sensor and tissue
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/7455 characterised by tactile indication, e.g. vibration or electrical stimulation
• CPC Class Codes: A61N 1/046 Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0484 Garment electrodes worn by the patient
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3931 Protecting, e.g. back-up systems
• CPC Class Codes: A61N 1/3968 Constructional arrangements, e.g. casings A61N1/375 takes precedence
• CPC Class Codes: A61N 1/3975 Power supply A61N1/378 takes precedence
• CPC Class Codes: A61N 1/3987 characterised by the timing or triggering of the shock

Abstract

A wearable therapeutic device to facilitate care of a subject is provided. The wearable therapeutic device can include a garment having a sensing electrode. The garment includes at least one of an inductive element and a capacitive element, and a controller identifies an inductance of the inductive element or a capacitance of the capacitive element, and determines a confidence level of information received from the sensing electrode based on the inductance or the capacitance. The wearable therapeutic device also includes an alarm module coupled with the controller and configured to provide a notification to a subject based on the confidence level.

Claims

1. A wearable therapeutic device, comprising:

a garment including a sensing electrode;

at least one of an inductive element having an inductance and a capacitive element having a capacitance included in at least part of the garment; and

a controller coupled to the sensing electrode and the at least one of the inductive element and the capacitive element, the controller comprising;

an expansion determiner to determine an amount of garment expansion based on at least one of the inductance of the inductive element and the capacitance of the capacitive element,

a sensing electrode position verifier to verify positioning of the sensing electrode on a subject at least in part by determining whether the amount of garment expansion is within a tolerance range, and

a tolerance range adjuster to adjust the tolerance range based on a quality level of information received from the sensing electrode.

2. The wearable therapeutic device of claim 1, wherein the tolerance range adjuster comprises a range increaser to adjust the tolerance range at least in part by decreasing at least one of an upper threshold and a lower threshold of the tolerance range in response to receiving substantially artifact free information from the sensing electrode.

3. The wearable therapeutic device of claim 1, wherein the tolerance range adjuster comprises a range decreaser to adjust the tolerance range at least in part by increasing at least one of an upper threshold and a lower threshold of the tolerance range in response to receiving distorted information from the sensing electrode.

4. The wearable therapeutic device of claim 1, wherein the controller further comprises a respiratory function determiner to determine respiratory function of the subject based on the amount of garment expansion.

5. The wearable therapeutic device of claim 4, wherein the sensing electrode comprises an electrocardiogram sensor to sense electrocardiogram information of the subject;

and wherein the controller further comprises an arrhythmia detector to detect an arrhythmia of the subject based at least in part on the determined respiratory function and the electrocardiogram information.

6. The wearable therapeutic device of claim 1, wherein the sensing electrode comprises an electrocardiogram sensor to sense electrocardiograph information of the subject;

and wherein the controller further comprises an arrhythmia detector to detect an arrhythmic cardiac event based on at least one of the amount of garment expansion and the electrocardiograph information of the subject.

7. The wearable device of claim 1, further comprising a therapy electrode coupled to the controller.

8. The wearable therapeutic device of claim 7, wherein the controller further comprises a therapy electrode position verifier to verify positioning of the therapy electrode on the subject based at least in part on the amount of garment expansion.

9. The wearable therapeutic device of claim 7, wherein the controller further comprises a treatment applier to apply treatment to the subject via the therapy electrode in response to detecting an arrhythmic cardiac event and verifying positioning of the therapy electrode.

10. The wearable therapeutic device of claim 1, wherein the garment includes at least one of a belt and a strap.

11. The wearable therapeutic device of claim 1, wherein the wearable therapeutic device includes the inductive element in at least part of the garment and the inductive element is coiled around a core.

12. A method of facilitating care of a subject, comprising:

providing a wearable therapeutic device that includes a sensing electrode;

receiving, from the sensing electrode, information about the subject;

determining at least one of an inductance of an inductive element and a capacitance of a capacitive element included in at least part of the wearable therapeutic device;

determining an amount of garment expansion based on at least one of the inductance of the inductive element and the capacitance of the capacitive element;

verifying positioning of the sensing electrode on the subject at least in part by determining whether the amount of garment expansion is within a tolerance range; and

adjusting the tolerance range based on a quality level of information received from the sensing electrode.

13. The method of claim 12, wherein adjusting the tolerance range includes decreasing at least one of an upper threshold and a lower threshold of the tolerance range responsive to receiving substantially artifact free information from the sensing electrode.

14. The method of claim 12, wherein adjusting the tolerance range includes increasing at least one of an upper threshold and a lower threshold of the tolerance range responsive to receiving distorted information from the sensing electrode.

15. The method of claim 12, further comprising determining respiratory function of the subject based on the amount of garment expansion.

16. The wearable therapeutic device of claim 12, wherein receiving information from the subject includes receiving electrocardiogram information from the subject, and the method further comprises detecting an arrhythmia of the subject based at least in part on the electrocardiogram information and a determination of respiratory function based on the amount of garment expansion.

17. The method of claim 12, further comprising verifying positioning of a therapy electrode included in the wearable therapeutic device at least in part on the amount of garment expansion.

18. The method of claim 17, further comprising:

detecting an arrhythmic cardiac event based on the received information about the subject; and

applying treatment to the subject via the therapy electrode responsive to detecting an arrhythmic cardiac event and verifying the positioning of the therapy electrode.

19. A non-transitory computer readable medium having stored thereon sequences of instructions including instructions that cause a processor to:

receive, from a sensing electrode of a wearable therapeutic device, information about the subject;

determine at least one of an inductance of an inductive element and a capacitance of a capacitive element included in at least part of the wearable therapeutic device;

determine an amount of garment expansion based on at least one of the inductance of the inductive element and the capacitance of the capacitive element;

verify positioning of the sensing electrode on the subject at least in part by determining whether the amount of garment expansion is within a tolerance range; and

adjust the tolerance range based on a quality level of information received from the sensing electrode.

20. The computer readable medium of claim 19, wherein the instructions that cause the processor to adjust the tolerance range include instructions that cause the processor to decrease at least one of an upper threshold and a lower threshold of the tolerance range in response to receiving substantially artifact free information from the sensing electrode.

21. The computer readable medium of claim 19, wherein the instructions that cause the processor to adjust the tolerance range include instructions that cause the processor to increase at least one of an upper threshold and a lower threshold of the tolerance range in response to receiving distorted information from the sensing electrode.