摘要:
A defibrillator featuring a treatment mode and a training mode comprises an energy source, an electrode connector, a controller, and training mode circuitry. The controller comprises a feature for connecting the energy source to the electrode connector and a pause actuator for permitting a user to inhibit electrical stimulation when no longer required. The training mode circuitry simulates the operation of the defibrillator in treatment mode. The defibrillator also includes a method of operating comprising the steps of: 1) providing a defibrillator having an energy source, a controller, and electrode connectors, wherein the controller further comprises circuits for actuating the defibrillator to deliver a defibrillation shock from the defibrillation energy source to the electrode connectors and 2) operating the defibrillator in a training mode to simulate delivery of a defibrillation shock from the energy source to the electrode connectors without delivering a defibrillation shock from the energy source to the electrode connectors.
摘要:
A method for gathering event data using a data gathering instrument having an instrument clock and an instrument data storage medium, the method comprising the steps of: gathering event data using the data gathering instrument; storing the event data in an instrument data storage medium; using an instrument clock to associate time information with the event data; storing the associated time information in the instrument data storage medium; separating the instrument data storage medium from the data gathering instrument; separating the instrument clock from the data gathering instrument; and storing in a main data storage medium the event data and the time information stored in the instrument data storage medium. The invention also includes a data gathering system practicing this method, the data gathering instrument itself, and removable instrument clock and memory modules, preferably disposed together in a housing such as a PCMCIA format card.
摘要:
Disclosed is a cardiac defibrillator for providing a cardiac defibrillation pulse to a patient. The defibrillator comprises a switch contact (14) mounted on a movable switch (10) that moves between a charge position and a discharge position. In the charge position, the switch contact is coupled to a high-voltage battery (22) in order to provide a charge to an energy storage capacitor (30). When the movable switch is released from the charge position, the switch contact engages an electrode contact (32) and a defibrillation pulse flows into a patient (40). The duration of the cardiac defibrillation pulse can be varied by changing the length of time that the switch contact remains engaged with electrode contact. Also disposed within the switch contact path is a discharge contact (42), which is connected to a discharge resistor (48). When the movable switch is in a discharge position, the switch contact is engaged with the discharge contact thereby allowing the discharge resistor to dissipate charge from the energy storage capacitor. A spring (16) is connected to the movable switch in order to rotate it between the charge and discharge positions.
摘要:
The following disclosure describes several methods and apparatus for intracranial electrical stimulation to treat or otherwise effectuate a change in neural-functions of a patient. The methods in accordance with the invention can be used to treat brain damage (e.g., stroke, trauma, etc.), brain disease (e.g., Alzheimer's, Pick's, Parkinson's, etc.), and/or brain disorders (e.g., epilepsy, depression, etc.). The methods in accordance with the invention can also be used to enhance neural-function of normal, healthy brains (e.g., learning, memory, etc.), or to control sensory functions (e.g., pain).
摘要:
The following disclosure describes a method for intracranial electrical stimulation to treat or otherwise effectuate a change in neural-functions of a patient. Several embodiments are directed toward enhancing or otherwise inducing a lasting change in neural activity to effectuate a particular neural-function. Such lasting change in neural activity is defined as “neuroplasticity.” The methods can be used to treat brain damage (e.g., stroke, trauma, etc.), brain disease (e.g., Alzheimer's, Pick's, Parkinson's, etc.), and/or brain disorders (e.g., epilepsy, depression, etc.). The methods can also be used to enhance neural-function of normal, healthy brains (e.g., learning, memory, etc.), or to control sensory functions (e.g., pain).
摘要:
The following disclosure describes several methods and apparatus for intracranial electrical stimulation to treat or otherwise effectuate a change in neural-functions of a patient. Several embodiments of methods in accordance with the invention are directed toward enhancing or otherwise inducing a lasting change in neural activity to effectuate a particular neural-function. Such lasting change in neural activity is defined as “neuroplasticity.” The methods in accordance with the invention can be used to treat brain damage (e.g., stroke, trauma, etc.), brain disease (e.g., Alzheimer's, Pick's, Parkinson's, etc.), and/or brain disorders (e.g., epilepsy, depression, etc.). The methods in accordance with the invention can also be used to enhance neural-function of normal, healthy brains (e.g., learning, memory, etc.), or to control sensory functions (e.g., pain). Certain embodiments of methods in accordance with the invention electrically stimulate the brain at a stimulation site where neuroplasticity is occurring. The stimulation site may be different than the region in the brain where neural activity is typically present to perform the particular neural function according to the functional organization of the brain. In one embodiment in which neuroplasticity related to the neural-function occurs in the brain, the method can include identifying the location where such neuroplasticity is present. In an alternative embodiment in which neuroplasticity is not occurring in the brain, an alternative aspect is to induce neuroplasticity at a stimulation site where it is expected to occur. Several embodiments of these methods that are expected to produce a lasting effect on the intended neural activity at the stimulation site use electrical pulses that increase the resting membrane potential of neurons at the stimulation site to a subthreshold level.
摘要:
An energy reduction unit is removably connectable to an external defibrillator to reduce the defibrillation energy delivered by the defibrillator to a patient. Use of the energy reduction unit is particularly suited to defibrillating pediatric patients (infants and children under 8) with an automatic or semi-automatic external defibrillator (AED). In one embodiment, the energy reduction unit includes an attenuator which partially dissipates energy produced by the AED. The attenuator is advantageously designed to present an impedance to the AED which, when connected to the patient, is approximately equal to the patient's impedance. The energy reduction unit may include a presence-detect function which enables the defibrillator to modify analysis of ECG signals to account for differences heart rhythms of pediatric and adult patients. In a second embodiment, the energy reduction unit includes an energy control modifier circuit which affects the charging operations performed internal to the AED. Other than being attached to the defibrillation equipment, the energy reduction unit does not otherwise change how an operator uses the equipment.
摘要:
A defibrillator and electrode system that gives the user a visible and/or audible indication of the condition of the electrodes and other parts of the defibrillator system prior to deployment of the electrodes and use of the defibrillator. In a preferred embodiment of the method of this invention, a patient simulation and analyze circuit within the defibrillator periodically tests the condition of the system and provides the user with a visual indication of the system's condition.
摘要:
This invention provides an external defibrillator and defibrillation method that automatically compensates for patient-to-patient impedance differences in the delivery of electrotherapeutic pulses for defibrillation and cardioversion. In a preferred embodiment, the defibrillator has an energy source that may be discharged through electrodes on the patient to provide a biphasic voltage or current pulse. In one aspect of the invention, the first and second phase duration and initial first phase amplitude are predetermined values. In a second aspect of the invention, the duration of the first phase of the pulse may be extended if the amplitude of the first phase of the pulse fails to fall to a threshold value by the end of the predetermined first phase duration, as might occur with a high impedance patient. In a third aspect of the invention, the first phase ends when the first phase amplitude drops below a threshold value or when the first phase duration reaches a threshold time value, whichever comes first, as might occur with a low to average impedance patient. This method and apparatus of altering the delivered biphasic pulse thereby compensates for patient impedance differences by changing the nature of the delivered electrotherapeutic pulse, resulting in a smaller, more efficient and less expensive defibrillator.
摘要:
A defibrillator and electrode system that gives the user a visible and/or audible indication of the condition of the electrodes and other parts of the defibrillator system prior to deployment of the electrodes and use of the defibrillator. In a preferred embodiment of the method of this invention, a patient simulation and analyze circuit within the defibrillator periodically tests the condition of the system and provides the user with a visual indication of the system's condition.