Defibrillation system

• US 6,374,138 B1
• Filed: 08/31/2000
• Issued: 04/16/2002
• Est. Priority Date: 03/07/1997
• Status: Expired due to Term

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Cardiac Science Operating Company (Cardica Incorporated)
• Inventors: Owen, James M., Totman, Mark H., Fincke, Randall W., OʼLeary, James P.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US09/652,329
• Time in Patent Office: 593 Days
• Field of Search: 607/2, 607/4, 607/5, 600/510, 600/518, 128/903, 128/904
• US Class Current: 607/5
• CPC Class Codes: A61N 1/0452 Specially adapted for transcutaneous muscle stimulation [TMS]
• CPC Class Codes: A61N 1/0456 Specially adapted for transcutaneous electrical nerve stimulation [TENS]
• CPC Class Codes: A61N 1/046 Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0468 Specially adapted for promoting wound healing
• CPC Class Codes: A61N 1/0472 Structure-related aspects
• CPC Class Codes: A61N 1/0476 Array electrodes (including any electrode arrangement with more than one electrode for at least one of the polarities)
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/0496 characterised by using specific chemical compositions, e.g. hydrogel compositions, adhesives
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]
• CPC Class Codes: A61N 1/3918 characterised by shock pathway, e.g. by electrode configuration
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3937 Monitoring output parameters
• CPC Class Codes: A61N 1/3987 characterised by the timing or triggering of the shock
• CPC Class Codes: A61N 1/3993 User interfaces for automatic external defibrillators

Abstract

A method of treating a patient for ventricular tachycardia using a wearable defibrillator includes monitoring the patient for a predetermined condition via one or more electrodes on the defibrillator, sending a message to the patient in response to the predetermined condition, activating the defibrillator so that the defibrillator delivers defibrillation energy to the patient, and storing at least one of the results of the monitoring, sending and activating steps in a memory on the defibrillator. The method also includes downloading information stored in the memory of the defibrillator to a base station having an external interface, and transmitting the information downloaded from the memory of the base station to an external location via the external interface of the base station.

Claims

1. A base station for use with a wearable defibrillator, the base station comprising:

a defibrillator interface over which information is exchanged with the defibrillator;

an external interface over which information is exchanged with an external entity; and

a controller which (i) receives patient information and defibrillation information from the defibrillator, (ii) transmits the patient information and defibrillation information to the external entity, (iii) receives defibrillator programming information from the external entity, (iv) programs the defibrillator in accordance with the defibrillator programming information, (v) performs diagnostics on the defibrillator, and (vi) transmits results of the diagnostics to at least one of the defibrillator and the external entity.

2. A base station according to claim 1, further comprising a patient simulator which mates to a defibrillator and which simulates patient responses so as to test the defibrillator.

3. A base station according to claim 1, wherein the patient information comprises at least one of abnormal heart activity of the patient, an electrocardiogram of the patient, an impedance of the patient, and artifact noise in the patient.

4. A base station according to claim 1, wherein the defibrillator programming information comprises at least one of patient identification (“

ID”

) number, ventricular tachycardia rate at which the defibrillation energy is to be delivered to the patient, patient thoracic impedance range, a time and a date at which the defibrillator was issued to the patient, a name of a clinic at the external entity, a name of a clinician at the clinic at the external entity, documentation regarding the defibrillator, and instructions on how to use the defibrillator.