Integrated electrical signal switching and amplifying system

• US 5,566,096 A
• Filed: 03/29/1994
• Issued: 10/15/1996
• Est. Priority Date: 11/13/1992
• Status: Expired due to Term

• Current Assignee: GE Marquette Medical Systems, Inc. (General Electric Company)
• Original Assignee: Quinton Electrophysiology Corporation
• Inventors: Fine, Richard M., Wodlinger, Harold M.
• Primary Examiner(s): Weinhardt, Robert A.
• Application Number:
  US08/219,692
• Time in Patent Office: 931 Days
• Field of Search: 364/413.02, 364/413.01, 364/574, 364/572, 364/571.01, 128/696, 128/702, 128/708, 128/710, 128/706, 128/712, 128/719
• US Class Current: 702/191
• CPC Class Codes: A61B 2562/226 comprising means for identifying the connector, e.g. to prevent incorrect connection to socket
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/304 Switching circuits
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick
• CPC Class Codes: G16H 40/40 for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades

Abstract

A signal management system is disclosed which integrates a patient switching box and an amplification unit into a single compact enclosure sufficiently small to reside by the patient table in an operating unit set up for electrophysiology procedures. The system includes a front panel designed to accept standard ECG leads, a plurality of intracardiac leads, including leads available for stimulation and/or lesion generation, and a plurality of pressure channels. The front panel also includes a touch screen display to allow quick assignments of labels to each of the ECG or intracardiac leads and the pressure channels. The system includes an onboard microprocessor which allows any operation performed on the system to be automatically updated on a remote computer processing unit if attached, and vice-versa. Digital signal processors are used in the system to perform switching operations on the electrical signals received, and to perform gain, limiting and/or filtering processes thereon. The digital signal processors are automatically calibrated to adjust for varying gain and phase performance of the inputing front-end amplifiers which deliver the electrical signals from the intracardiac leads.

Claims

1. An integrated intracardiac signal switching and amplifying system for receiving intracardiac signals, amplifying the received intracardiac signals, applying common mode rejection to the amplified intracardiac signals, and outputting the common mode rejected intracardiac signals, said system comprising:

an intracardiac signal receiver for receiving the intracardiac signals from a patient,

an intracardiac signal amplifier for receiving the received intracardiac signals and amplifying the intracardiac signals,

an analog to digital converter for receiving the amplified intracardiac signals and converting the amplified intracardiac signals into digital intracardiac signals,

a digital signal processor for receiving the digital intracardiac signals and performing a common mode rejection operation on the digital intracardiac signals, and

an intracardiac signal output for outputting the common mode rejected intracardiac signals from said system.

2. A system according to claim 1 wherein said signal receiver includes means for receiving analog electrical intracardiac signals, and said signal amplifier includes means for converting the analog intracardiac signals to digital intracardiac signals and said digital signal processor includes means for switching the digital intracardiac signals to perform a signal switching operation and said common mode rejection operation and said signal output includes means for converting the digital intracardiac signals into analog signals prior to output thereof from said system.

3. A system according to claim 1 wherein said digital signal processor processes said digital intracardiac signals for gain, signal limiting and applies a plurality of filters thereto.

4. A method for processing an intracardiac signal from a patient with an integrated signal and amplifying system for use in an electrophysiology procedure, the method including,

receiving an intracardiac signal from the patient with a receiver,

amplifying the intracardiac signal received by the receiver with an amplifier to create an amplified signal,

converting the amplified signal received from the amplifier with an analog to digital converter to create a digital intracardiac signal,

performing a common mode noise rejection operation on the digital intracardiac signal received from the converter with a digital signal processor to create a processed digital intracardiac signal,

outputting the processed intracardiac signal from the system.

5. The method of claim 4 further including the step of performing a switching operation on the digital intracardiac signal by the digital signal processor.

6. The method of claim 4 further including the step of processing the digital intracardiac signal for gain and signal limiting and filtering the digital intracardiac signal by the digital signal processor.