[특허]Pulse detection method and apparatus using patient impedance

Pulse detection method and apparatus using patient impedance 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61N-001/37 A61B-005/024 A61B-005/0464 A61B-005/08 A61B-005/00 A61N-001/39 A61N-001/365
출원번호	US-0688729 (2010-01-15)
등록번호	US-9950178 (2018-04-24)
발명자 / 주소	Stickney, Ronald E. Taylor, James W. O'Hearn, Patricia Jayne, Cynthia P. Lank, Paula Hampton, David R.
출원인 / 주소	Physio-Control, Inc.
대리인 / 주소	Baker & Hostetler LLP
인용정보	피인용 횟수 : 0 인용 특허 : 95

초록 ▼

The presence of a cardiac pulse in a patient is determined by evaluating fluctuations in an electrical signal that represents a measurement of the patient's transthoracic impedance. Impedance signal data obtained from the patient is analyzed for a feature indicative of the presence of a cardiac pulse. Whether a cardiac pulse is present in the patient is determined based on the feature in the impedance signal data. Electrocardiogram (ECG) data may also be obtained in time coordination with the impedance signal data. Various applications for the pulse detection of the invention include detection of PEA and prompting PEA-specific therapy, prompting defibrillation therapy and/or CPR, and prompting rescue breathing depending on detection of respiration.

대표청구항 ▼

1. An electrotherapy device, comprising: (a) electrodes adapted to sense an electrocardiogram (ECG) signal from a patient and adapted to communicate an impedance-sensing signal through the patient;(b) an electrotherapy generator in communication with the electrodes for delivering electrotherapy to the patient; and(c) processing circuitry in communication with the electrodes and the electrotherapy generator and configured to: analyze the patient's ECG signal for asystole, and if the patient is determined to be in asystole condition, prompt a user for delivery of chest compressions;analyze the impedance-sensing signal to determine the presence of chest compressions being delivered to the patient and if chest compressions are not determined to be present during a cardiopulmonary resuscitation (CPR) period, prompt delivery of chest compressions to the patient;filter the impedance signal through a bandpass filter; andanalyze the filtered impedance-sensing signal to determine the presence of respiration in the patient by comparing impedance signal data that is based on the impedance-sensing signal to a previously identified impedance signal data pattern known to be indicative of a presence of respiration, the processing circuitry further configured to prompt the delivery of rescue breathing therapy to the patient if respiration is determined not present in the patient,in which the electrotherapy generator and the processing circuitry are implemented in an automated external defibrillator. 2. The electrotherapy device of claim 1, in which the processing circuitry is further configured to analyze the impedance signal data by determining cardiac output in terms of a stroke volume and use the determined cardiac output as an additional feature indicative of the presence of a cardiac pulse, the processing circuitry is further configured to prompt a message on a display reporting whether a cardiac pulse is present in the patient. 3. A method comprising: obtaining, with an automated external defibrillator, an electrocardiogram (ECG) signal and an impedance signal data derived from an impedance-sensing signal from a patient;analyzing, with the automated external defibrillator, the ECG signal for asystole, filtering the impedance signal through a bandpass filter, and analyzing the filtered impedance signal data to determine the presence of respiration in the patient by comparing the impedance signal data to a previously identified impedance signal data pattern known to be indicative of a presence of respiration;prompting, with the automated external defibrillator, a user for delivery of chest compressions in response to the analysis determining the patient to be in an asystole condition; andprompting, with the automated external defibrillator, the user for delivery of rescue breathing therapy to the patient if the respiration is determined not present in the patient. 4. The method of claim 3, further comprising: analyzing, with the automated external defibrillator, the impedance-sensing signal to determine the presence of chest compressions being delivered to the patient by comparing impedance signal data to a previously identified impedance signal data pattern known to be indicative of a presence of chest compressions; andprompting, with the automated external defibrillator, delivery of chest compressions to the patient if chest compressions are not detected during a CPR period. 5. The electrotherapy device of claim 3, in which the processing circuitry is further configured to analyze the impedance signal data by determining cardiac output in terms of a rate of output and use the determined cardiac output as an additional feature indicative of the presence of a cardiac pulse, the processing circuitry is further configured to prompt a message on a display reporting whether a cardiac pulse is present in the patient.

이 특허에 인용된 특허 (95)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Pulse detection method and apparatus using patient impedance 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허에 인용된 특허 (95)

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연합인증

Pulse detection method and apparatus using patient impedance 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허에 인용된 특허 (95)

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