摘要:
A defibrillator method and apparatus wherein a patient's measured transthoracic impedance (TTI) is used to control the amount of energy contained in a defibrillation pulse applied to the patient. Prior to delivering a defibrillation pulse, the patient's TTI is measured by an impedance measuring circuit (11). The patient's TTI may also be measured during delivery of a prior defibrillation pulse. A microprocessor (23) uses the measured patient TTI to control the shape of the defibrillation pulse by controlling: (i) the phase duration of the defibrillation pulse; and (ii) the voltage level to which the defibrillator's capacitor bank (15) is charged. The defibrillation pulse shape is controlled so that the energy conveyed by the defibrillation pulse to the patient is near or exceeds a desired value. The desired value may be set by an operator via an energy selector (25). A switch (13) controls the connection of defibrillator electrodes (27a, 27b) to the impedance measuring circuit (11) and the capacitor bank (15).
摘要:
The system and method provide for electrocardiogram analysis and optimization of patient-customized cardiopulmonary resuscitation and therapy delivery. An external medical device includes a housing and a processor within the housing. The processor can be configured to receive an input signal for a patient receiving chest compressions and to select at least one filter mechanism and to apply the filter mechanism to the signal to at least substantially remove chest compression artifacts from the signal. A real time dynamic analysis of a cardiac rhythm is applied to adjust and integrate CPR prompting of a medical device. Real-time cardiac rhythm quality is facilitated using a rhythm assessment meter.
摘要:
A dosage for electrotherapy delivered to a patient, such as a defibrillation pulse delivered by an external defibrillator, is selected based on an age-related classification, such as adult or child, and a measured electrical parameter, such as the transthoracic impedance, of the patient. For example, a nominal voltage level for an energy storage circuit may be determined based on a nominal dosage. The nominal voltage level may be adjusted by applying a function that relates voltage level adjustment to impedance to the measured impedance. The function may be selected based on the age-related classification of the patient. The dosage of the defibrillation pulse delivered based on the adjusted voltage level, i.e., the selected dosage, may have a substantially equivalent probability of success for the patient as the nominal dosage would provide for a reference patient with an average transthoracic impedance for the class of which the patient is a member.
摘要:
Systems, devices, software and methods are provided, for making a decision as to whether to administer an electric shock to a patient. The decision can be made differently, depending on whether the patient has already been shocked or not.
摘要:
Medical devices, software and methods are provided, for making a decision as to whether to administer electric shock therapy to a patient. The decision is made with respect to ECG data that is discounted at least partially, and sometimes even completely, if it occurs during a transition between chest compression group and a pause for ventilation.
摘要:
A cardiac arrhythmia may be induced by delivering a sequence of pulses to a patient via one or more extravascular electrodes. In one example, one or more pacing pulses may be delivered to a patient via an extravascular electrode and a shock pulse may be delivered to the patient the extravascular electrode. In some examples, the pacing pulses and the shock pulse may be generated with energy from a common energy storage module and without interim charging of the module. For example, the pacing and shock pulses may be generated as the energy storage module dissipates. In another example, a cardiac arrhythmia may be induced in a patient by delivering a burst of pulses to a patient via an extravascular electrode. In some cases, the burst of pulses may be generated with energy from a common energy storage module and without interim charging of the energy storage module.
摘要:
A cardiac arrhythmia may be induced by delivering a sequence of pulses to a patient via one or more extravascular electrodes. In one example, one or more pacing pulses may be delivered to a patient via an extravascular electrode and a shock pulse may be delivered to the patient the extravascular electrode. In some examples, the pacing pulses and the shock pulse may be generated with energy from a common energy storage module and without interim charging of the module. For example, the pacing and shock pulses may be generated as the energy storage module dissipates. In another example, a cardiac arrhythmia may be induced in a patient by delivering a burst of pulses to a patient via an extravascular electrode. In some cases, the burst of pulses may be generated with energy from a common energy storage module and without interim charging of the energy storage module.
摘要:
Techniques are provided for alerting a person to check a medical device while conserving battery power. The medical device initiates a status alert if a readiness condition of the medical device is no longer being met. The status alert includes notification periods during which an audible sound is emitted alternating with off periods during which substantially no audible sound is emitted. The audible sounds may include certain tones or at least one spoken word. At least one of the duration of successive notification periods or the duration of successive off periods may be varied. In this manner, the medical device may provide audible sound at different times during the day in an attempt to get the attention of a person. In addition, the medical device may sense an activity to determine when to provide the audible sound.
摘要:
Techniques are provided for alerting a person to check a medical device while conserving battery power. The medical device initiates a status alert if a readiness condition of the medical device is no longer being met. The status alert includes notification periods during which an audible sound is emitted alternating with off periods during which substantially no audible sound is emitted. The audible sounds may include certain tones or at least one spoken word. At least one of the duration of successive notification periods or the duration of successive off periods may be varied. In this manner, the medical device may provide audible sound at different times during the day in an attempt to get the attention of a person. In addition, the medical device may sense an activity to determine when to provide the audible sound.
摘要:
Devices, methods, and software implementing those methods for providing communicating external chest compression (ECC) devices and defibrillation (DF) devices, where the ECC and DF devices can be physically separate from each other. Both ECC and DF devices are able to operate autonomously, yet able to communicate with and cooperate with another device when present. Some ECC and DF devices are adapted to be physically and/or electrically coupled to each other. One ECC device includes a backboard, a chest compression member, a communication module, controller, and at least one sensor, electrode lead or electrode. One DF device includes a defibrillator module, a controller, and a communication module that can communicate with the ECC communication module. The communicating ECC and DF devices may deliver ECC, pacing, defibrillation, ventilation, and cooling therapies, and may deliver instructions to human assistants, in a coordinated and cooperative fashion.