摘要:
A circuit with low voltage energy storage for use in generating a defibrillation waveform is described. A charging circuit includes a pulse capacitor that stores defibrillation energy, a high voltage generator circuit that includes a transformer and a rectification circuit through which the pulse capacitor is charged with the defibrillation energy, and a discharge and polarity control circuit electrically connected to the pulse capacitor and switchable to receive the defibrillation energy, which is output as a defibrillation waveform. A low voltage energy supplementing circuit is electrically connected to the pulse capacitor in line with the high voltage generator circuit and stores supplemental defibrillation energy. A microcontroller is adapted to enable the low voltage energy supplementing circuit to modulate the delivery of the stored supplemental energy to the pulse capacitor to augment the defibrillation energy derived from\the initial defibrillation waveform.
摘要:
An electrocardiography patch is provided. A flexible backing is formed of an elongated strip of stretchable material and a pair of electrodes is respectively affixed on a contact surface of each end of the elongated strip. A flexible circuit is affixed on each end of the elongated strip and includes a pair of circuit traces electrically coupled to each electrode. A non-conductive receptacle is securely adhered on the one end of the elongated strip opposite the contact surface and formed to removably receive an electrocardiography monitor and house a battery. Electrical pads are provided on a bottom surface of the non-conductive receptacle to interface with electrical contacts protruding from the electrocardiography monitor. A pair of the electrical pads is formed to electrically couple with the electrodes. A pair of battery leads is formed on the non-conductive receptacle to electrically interface the battery to another pair of the electrical pads.
摘要:
A method for performing ambulatory electrocardiographic monitoring is provided. An ambulatory ECG monitor, that includes a plurality of sensing electrodes coupled to self-powered sensing circuitry, is provisioned. A monitoring site is located on the surface of a patient's chest at midline and above the body of the sternum adjacent to the fourth and fifth intercostal spaces. The electrodes are aligned and placed along the midline. The ambulatory ECG monitor is removably adhered to the monitoring site for the duration of monitoring. ECG data is sensed through the sensing electrodes at the monitoring site and the sensed ECG data is recorded into the sensing circuitry.
摘要:
A computer-implemented electrocardiographic data processor with time stamp correlation is provided. A monitoring circuit includes a persistent memory and power supply that powers an encoder that determines a differential voltage between a current discrete digital voltage value and a prior voltage value. The differential voltage is stored into the persistent memory in a digitized data stream representative of analog cardiac action potential signals. Digitally-encoded voltage values and time stamps are retrieved from the persistent memory. A post-processing application executes. A set of output voltages and voltage differences that each correspond to lower and upper bounds of voltage is stored. Each retrieved voltage value is compared to the voltage bounds and the voltage differences within which each retrieved voltage value falls is identified. The output voltages corresponding to the voltage differences is selected. A display depicts the output voltages as reproduced analog cardiac action potential signals and correlates the time stamps.
摘要:
An ambulatory electrocardiographic (ECG) monitor with a jumpered sensing electrode and method of use is provided. Self-powered ECG sensing circuitry is fully enclosed in a housing that provides electrode connection receptacles on a bottom surface of the housing. A flexible and stretchable electrode mounting panel having an elongated shape is provided with a layer of skin adhesive on a skin contacting surface. Sensing electrodes are mounted on opposite ends of the mounting panel. Each sensing electrode includes an electrode pad facing the skin contacting surface and an oppositely-facing electrode connection plug. Each connection plug is removably and pivotably couplable into the connection receptacles. A jumper wire assembly includes a jumper connection plug electrically connected to a jumper connection receptacle. The jumper connection plug is removably and pivotably couplable into the connection receptacles and the jumper connection receptacle is removably and pivotably couplable into the connection plugs on the mounting panel.
摘要:
A computer-implemented electrocardiographic data processor with time stamp correlation is provided. A monitoring circuit includes a persistent memory and power supply that powers an encoder that determines a differential voltage between a current discrete digital voltage value and a prior voltage value. The differential voltage is stored into the persistent memory in a digitized data stream representative of analog cardiac action potential signals. Digitally-encoded voltage values and time stamps are retrieved from the persistent memory. A post-processing application executes. A set of output voltages and voltage differences that each correspond to lower and upper bounds of voltage is stored. Each retrieved voltage value is compared to the voltage bounds and the voltage differences within which each retrieved voltage value falls is identified. The output voltages corresponding to the voltage differences is selected. A display depicts the output voltages as reproduced analog cardiac action potential signals and correlates the time stamps.
摘要:
A microcontrolled electrocardiographic monitoring circuit with feedback control is provided. An input signal path includes an electrode, a low pass filter, and an amplifier connected in-line. The electrode senses an input signal and the amplifier outputs a filtered amplified output signal. A microcontroller circuit includes an input codec, analog-to-digital converter, and feedback generation module. The analog-to-digital converter converts the filtered amplified output signal into a data stream of discrete digital values. The feedback module identifies a pairing of drive resistor settings matched to each discrete digital value, which are output as a digital feedback signal. The output signal path includes an electrode and a buffer connected in-line. A pair of drive resistors is connected in parallel to an input terminal of the buffer and to the output terminals of the feedback module. Each drive resistor is adjusted according to the digital feedback signal, and the electrode provides an output signal.
摘要:
A method for performing ambulatory electrocardiographic monitoring on an adult female is provided. An ambulatory ECG monitor, that includes a plurality of sensing electrodes coupled to self-powered sensing circuitry, is provisioned. A monitoring site is located on the surface of a patient's chest at midline and above the body of the sternum adjacent to the fourth and fifth intercostal spaces between the breasts in the upper portion of the intermammary cleft. The electrodes are aligned and placed along the midline. Interference from breast tissue with placement of the ambulatory monitor at the monitoring site is evaluated. The ambulatory ECG monitor is removably adhered to the monitoring site clear of any breast tissue interference for the duration of monitoring. ECG data is sensed through the sensing electrodes at the monitoring site and the sensed ECG data is recorded into the sensing circuitry.
摘要:
An ambulatory electrocardiographic (ECG) monitor with a jumpered sensing electrode and method of use for female and large-girthed patients is provided. Self-powered ECG sensing circuitry is fully enclosed in a housing with electrode receptacles on a bottom surface. A flexible and stretchable electrode mounting panel is provided with a layer of skin adhesive. A standoff pad is placed between the housing and the electrode mounting panel. Sensing electrodes are mounted on opposite ends of the mounting panel. Each sensing electrode includes an electrode pad facing the skin contacting surface and an oppositely-facing electrode plug. Each plug is removably and pivotably couplable into the receptacles. A jumper wire assembly includes a jumper plug electrically connected to a jumper receptacle. The jumper plug is removably and pivotably couplable into the receptacles and the jumper receptacle is removably and pivotably couplable into the plugs on the mounting panel opposite from the standoff pad.
摘要:
A microcontrolled electrocardiographic monitoring circuit with differential voltage encoding is provided. An input signal path includes an electrode, a low pass filter, and an amplifier, which are each connected in-line. The electrode senses an input signal via a conductive surface and the amplifier outputs a filtered amplified output signal. A microcontroller circuit includes an input codec, an analog-to-digital converter, and an encoder. The analog-to-digital converter is connected to the input signal path through an output of the amplifier and converts the filtered amplified output signal into a data stream of discrete digital values. The encoder determines a differential voltage between a current discrete digital value and a prior discrete digital value in the data stream. Persistent memory is connected to the microcontroller circuit via a peripheral serial interface bus, wherein the differential voltages for each of the discrete digital values in the data stream are stored into the persistent memory.