Method and apparatus for enhancement of chest compressions during CPR
First Claim
1. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
- a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions;
at least one sensor connected to the pad, the sensor being configured to sense movement of the chest or force applied to the chest;
processing circuitry for processing the output of the sensor to determine whether the rescuer is substantially releasing the chest following chest compressions; and
at least one prompting element connected to the processing circuitry for providing the rescuer with information as to whether the chest is being substantially released following chest compressions.
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Reexamination
Accused Products
Abstract
An apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions, at least one sensor connected to the pad, the sensor being configured to sense movement of the chest or force applied to the chest, processing circuitry for processing the output of the sensor to determine whether the rescuer is substantially releasing the chest following chest compressions, and at least one prompting element connected to the processing circuitry for providing the rescuer with information as to whether the chest is being substantially released following chest compressions.
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Citations
60 Claims
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1. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
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a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions; at least one sensor connected to the pad, the sensor being configured to sense movement of the chest or force applied to the chest; processing circuitry for processing the output of the sensor to determine whether the rescuer is substantially releasing the chest following chest compressions; and at least one prompting element connected to the processing circuitry for providing the rescuer with information as to whether the chest is being substantially released following chest compressions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
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a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions; at least one motion sensor connected to the pad, the motion sensor being configured to sense movement of the chest; processing circuitry for processing the output of the motion sensor to estimate the maximum velocity of compression of the chest; and at least one prompting device connected to the processing circuitry for providing the rescuer with information representative of the maximum velocity of compression. - View Dependent Claims (17, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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18. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
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a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions; and at least one velocity sensor connected to the pad, the velocity sensor being configured to sense the linear velocity of upward and downward movement of the chest. - View Dependent Claims (19, 20)
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30. A method of determining chest compression during CPR, the method comprising
applying a motion sensor to the chest of a patient at a location near or at the location at which a rescuer applies force to produce chest compressions; -
determining chest displacement from analysis of features of the motion waveform produced by the motion sensor, wherein determining chest displacement from analysis of features comprises determining onset and completion times for a compression cycle from the features of the waveforms. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of determining chest compression during CPR, the method comprising
applying a motion sensor to the chest of a patient at a location near or at the location at which a rescuer applies force to produce chest compressions; -
determining chest displacement from analysis of features of the motion waveform produced by the motion sensor, wherein the motion sensor is an accelerometer, and further comprising processing the output of the accelerometer to provide velocity and acceleration waveforms, and further comprising prompting a rescuer based as to whether compressions are within desired limits on compression depth and compression release, wherein the prompts to the rescuer are based on multi-cycle trends, so that they are not immediately influenced by the rescuer taking a brief break in the application of CPR.
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41. A method of determining chest compression during CPR, the method comprising
applying a motion sensor to the chest of a patient at a location near or at the location at which a rescuer applies force to produce chest compressions; -
determining chest displacement from analysis of features of the motion waveform produced by the motion sensor, wherein the motion sensor is an accelerometer, and further comprising processing the output of the accelerometer to provide velocity and acceleration waveforms, and further comprising prompting a rescuer based as to whether compressions are within desired limits on compression depth and compression release, and further comprising determining chest compliance, and using the determined chest compliance to adjust the level of pressure/force that the rescuer is permitted to apply at the end of a compression stroke without being prompted as to insufficiently releasing the chest.
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42. A method of determining chest compression during CPR, the method comprising
applying a motion sensor to the chest of a patient at a location near or at the location at which a rescuer applies force to produce chest compressions; -
determining chest displacement from analysis of features of the motion waveform produced by the motion sensor, wherein the motion sensor is an accelerometer, and further comprising processing the output of the accelerometer to provide velocity and acceleration waveforms, and wherein the features determined from the waveforms include one or more of the following;
width, amplitude, area, center of mass, skewness, height/width ratio, TAR, TAMPR and TWR. - View Dependent Claims (43, 44)
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45. A method of analyzing ECG signals during application of CPR, the method comprising:
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detecting ECG signals during application of chest compressions; detecting the output of a sensor from which information on the velocity of chest compressions can be determined; and using the information on the velocity to reduce at least one signal artifact in the ECG signal resulting from the chest compressions. - View Dependent Claims (46, 47, 48, 49, 50, 51)
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52. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
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a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions; at least one motion sensor connected to the pad, the motion sensor being configured to sense movement of the chest; at least one force sensor connected to the pad, the force sensor being configured to sense force applied to the chest; and processing circuitry for processing the output of the motion sensor and force sensor to estimate the compliance of the chest. - View Dependent Claims (53, 54, 55, 56)
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57. Apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising:
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a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions; at least one bistable mechanical element that when depressed provides tactile feedback to the hand of the rescuer upon the start of a compression and at the end of a compression. - View Dependent Claims (58, 59, 60)
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Specification