Systems and methods for signal acquisition and visualization
First Claim
1. A system for bi-directionally conveying biomedical signals between a patient and biomedical signal acquisition and processing devices, comprising:
- an analog input protection and filtering stage, configured to be coupled to a plurality of electrodes that conduct the biomedical signals, the analog input protection and filtering stage comprising a differential circuit with two paths configured to process the biomedical signals in an analog domain to and from the patient;
a signal amplification stage comprising a differential amplifier circuit with a plurality of differential amplifier stages, wherein the differential amplifier circuit is coupled to each of the two paths of the differential circuit and is configured to amplify a first output of the differential circuit by an amplification factor of less than or equal to about 50 for the biomedical signals within a frequency range of about 0.01 Hz to about 1000 Hz;
an analog-to-digital converter stage comprising an analog-to-digital converter coupled to the differential amplifier circuit and configured to digitize a second output of the differential amplifier circuit, wherein the analog-to-digital converter has greater than 16-bit resolution;
a communication module, coupled to the analog-to-digital converter stage and configured to provide a digital communication interface between a digitized third output of the analog-to-digital converter stage and an input to a digital processing stage; and
the digital processing stage, coupled to the communication module, comprising;
a memory with a signal path module comprising a plurality of signal modules configured to apply filtering comprising frequency-selective filtering and signal processing algorithms to the digitized third output from the analog-to-digital converter stage to extract high-frequency and low-amplitude features of the biomedical signals; and
at least one processor configured to execute the plurality of signal modules, wherein the at least one processor filters the biomedical signals in frequency ranges of interest.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems, apparatus, and methods are disclosed for bi-directionally conveying biomedical signals between a patient and signal acquisition and processing devices. An electrophysiology (EP) system includes an analog input protection and filtering stage with a differential circuit to process the biomedical signals to and from the patient; a signal amplification stage with a differential amplifier circuit to amplify an output of the differential circuit; an analog-to-digital converter stage to digitize an output of the differential amplifier circuit; a communication module to interface between the analog-to-digital converter stage and a digital processing stage having a plurality of signal modules; at least one processor to execute the plurality of signal modules, applying frequency-selective filtering and signal processing algorithms to the output from the analog-to-digital converter stage, to extract high-frequency and low-amplitude features of the biomedical signals in frequency ranges of interest; and a display for pattern- and time-aligned visualization of the biomedical signals.
200 Citations
29 Claims
-
1. A system for bi-directionally conveying biomedical signals between a patient and biomedical signal acquisition and processing devices, comprising:
-
an analog input protection and filtering stage, configured to be coupled to a plurality of electrodes that conduct the biomedical signals, the analog input protection and filtering stage comprising a differential circuit with two paths configured to process the biomedical signals in an analog domain to and from the patient; a signal amplification stage comprising a differential amplifier circuit with a plurality of differential amplifier stages, wherein the differential amplifier circuit is coupled to each of the two paths of the differential circuit and is configured to amplify a first output of the differential circuit by an amplification factor of less than or equal to about 50 for the biomedical signals within a frequency range of about 0.01 Hz to about 1000 Hz; an analog-to-digital converter stage comprising an analog-to-digital converter coupled to the differential amplifier circuit and configured to digitize a second output of the differential amplifier circuit, wherein the analog-to-digital converter has greater than 16-bit resolution; a communication module, coupled to the analog-to-digital converter stage and configured to provide a digital communication interface between a digitized third output of the analog-to-digital converter stage and an input to a digital processing stage; and the digital processing stage, coupled to the communication module, comprising; a memory with a signal path module comprising a plurality of signal modules configured to apply filtering comprising frequency-selective filtering and signal processing algorithms to the digitized third output from the analog-to-digital converter stage to extract high-frequency and low-amplitude features of the biomedical signals; and at least one processor configured to execute the plurality of signal modules, wherein the at least one processor filters the biomedical signals in frequency ranges of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A system for near real-time visualization of one or more biomedical signals emitted from a patient, comprising:
-
a differential circuit having two paths and configured to process the one or more biomedical signals in an analog domain, wherein the differential circuit is further configured to linearly attenuate a respective amplitude of the one or more biomedical signals within a first frequency range between about 350 kHz and about 600 kHz; a differential amplifier module comprising a plurality of differential amplifier stages, wherein the differential amplifier module is coupled to each of the two paths of the differential circuit and is configured to amplify a first output of the differential circuit by an amplification factor, wherein the amplification factor is less than or equal to about 50 for the one or more biomedical signals within a second frequency range between about 0.01 Hz and about 1000 Hz; an analog-to-digital converter module, coupled to the differential amplifier module and configured to digitize a second output of the differential amplifier module to produce a digitized third output of the analog-to-digital converter module, wherein the analog-to-digital converter module has greater than 16-bit resolution; a processor comprising software, configured to apply filtering comprising frequency-selective filtering and signal processing algorithms to the digitized third output from the analog-to-digital converter module to extract high-frequency and low-amplitude features of the one or more biomedical signals, and output packets of processed signals and the one or more biomedical signals; a plurality of synchronization delay elements configured to synchronize the processed signals with the one or more biomedical signals; and a display device comprising a graphical user interface, configured to display the synchronized processed signals and the one or more biomedical signals. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. A system for visualization of one or more biomedical signals emitted from a patient, the system comprising:
a biomedical signal interface device for conveying the one or more biomedical signals to the system, comprising; an input protection circuit to shunt a defibrillation signal; a plurality of circuit board elements coupled to the input protection circuit, each of the plurality of circuit board elements comprising; a differential circuit having two paths configured to process the one or more biomedical signals in an analog domain, wherein the differential circuit is further configured to linearly attenuate a respective amplitude of the one or more biomedical signals within a first frequency range between about 350 kHz and about 600 kHz; a differential amplifier module comprising a plurality of differential amplifier stages, wherein the differential amplifier module is coupled to each of the two paths of the differential circuit and is configured to amplify a first output of the differential circuit by an amplification factor, wherein the amplification factor is less than or equal to about 50 for the one or more biomedical signals within a second frequency range between about 0.01 Hz and about 1000 Hz; and an analog-to-digital converter module, coupled to the differential amplifier module, configured to digitize a second output of the differential amplifier module to produce a digitized third output of the analog-to-digital converter module, wherein the analog-to-digital converter module has greater than 16-bit resolution; and a processor comprising software, communicatively coupled to each analog-to-digital converter module of the plurality of circuit board elements, wherein the processor is configured to process the respective digitized third output from each analog-to-digital converter module for display. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
26. A system for visualization of one or more biomedical signals from a patient, the system comprising:
-
a medical signal interface device for conveying the one or more biomedical signals between the patient and monitoring or treatment devices, wherein the one or more biomedical signals have a recognized pattern, the medical signal interface device comprising; a differential circuit having two paths configured to process the one or more biomedical signals in an analog domain, wherein the differential circuit is further configured to linearly attenuate a respective amplitude of the one or more biomedical signals within a first frequency range between about 350 kHz and about 600 kHz; a differential amplifier module comprising a plurality of differential amplifier stages, wherein the differential amplifier module is coupled to each of the two paths of the differential circuit and is configured to amplify a first output of the differential circuit by an amplification factor, wherein the amplification factor is less than or equal to about 50 for the one or more biomedical signals within a second frequency range between about 0.01 Hz and about 1000 Hz; and an analog-to-digital converter module, coupled to the differential amplifier module, configured to digitize a second output of the differential amplifier module to produce a digitized third output of the analog-to-digital converter module, wherein the analog-to-digital converter module has greater than 16-bit resolution; and a processor comprising software, wherein the software comprises a digital processing function configured to identify a measure of deviation between the digitized third output of the analog-to-digital converter module and the recognized pattern of the one or more biomedical signals. - View Dependent Claims (27, 28, 29)
-
Specification