WO1994008507B1 - Monitor and method for acquiring and processing electrical signals relating to bodily functions - Google Patents

Monitor and method for acquiring and processing electrical signals relating to bodily functions

Info

Publication number
WO1994008507B1
WO1994008507B1 PCT/US1993/009763 US9309763W WO9408507B1 WO 1994008507 B1 WO1994008507 B1 WO 1994008507B1 US 9309763 W US9309763 W US 9309763W WO 9408507 B1 WO9408507 B1 WO 9408507B1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
monitor
electrical signals
acquiring
stream
Prior art date
Application number
PCT/US1993/009763
Other languages
French (fr)
Other versions
WO1994008507A1 (en
Filing date
Publication date
Priority claimed from US07/961,525 external-priority patent/US5368041A/en
Application filed filed Critical
Priority to CA002146979A priority Critical patent/CA2146979C/en
Priority to EP93923860A priority patent/EP0665728A4/en
Priority to AU53702/94A priority patent/AU5370294A/en
Publication of WO1994008507A1 publication Critical patent/WO1994008507A1/en
Publication of WO1994008507B1 publication Critical patent/WO1994008507B1/en

Links

Abstract

An EEG monitor utilizes a portable acquisition module (14) and a substantially stationary processing module (12). The EEG signals are acquired and converted to an oversampled stream of digital signals by a sigma-delta modulator (64) located in the data acquisition module. The signals are then filtered by a decimation filter (62) located in the processing module. Additional means are also provided to monitor the electrode leads to detect when the leads become unplugged. The monitor provides all power to the data acquisition module over a single twisted line which transmits data as well.

Claims

- -
AMENDED CLAIMS
[received by the International Bureau on 7 April 1994 (07.04.94); original claims 1, 2, 3, 5 and 19 amended; remaining claims unchanged (3 pages)]
1. A monitor for receiving electrical signals from a living body and processing such signals to obtain information relating to a bodily function or organ, said monitor comprising: means for acquiring the electrical signals through one or more electrodes connected to the body, said electrical signals being unfiltered in a preselected bandwidth greater than the bandwidth into which the electrical signals are expected to fall, said means for acquiring being located within a first housing and including a means for receiving the unfiltered electrical signals in analog form and converting the signals into an unfiltered stream of digital signals; means for filtering said stream of digital signals to isolate signals of interest from said stream of digital signals, said means for filtering being located in a second housing separate from a housing in which said means for acquiring is located; means for transmitting said unfiltered electrical signals from said means for acquiring to said means for filtering.
2. The monitor of claim 1 wherein said means for receiving the analog signals is an analog modulator which includes means for outputting signals in a one-bit digital stream.
3. The monitor of claim 2 wherein said modulator further comprises means for outputting said one bit digital stream at a rate greater than twice the rate required by the Nyquist principle.
4. The monitor of claim 1 wherein said means for acquiring is a portable device of a size that fits within a human hand. 5. The monitor of claim 1 further comprising a plurality of units of said means for receiving and converting all located in a single housing.
-28-
17. The monitor for receiving electrical signals from a living body of claim 16 wherein said means for acquiring comprises a transformer which receives said voltage pulse through said means for connecting.
18. The monitor for receiving electrical signals from a living body of claim 16 wherein said means for detecting comprises a comparator which measures said droop after a fixed time interval elapses and compares said mesured droop to a predefined level.
19. A monitor for receiving electrical signals from a living body and processing such signals to obtain information relating to a bodily function or organ, said monitor comprising means for acquiring the electrical signals through one or more electrodes connected to the body, said electrical signals being unfiltered in a preselected bandwidth greater than the bandwidth into which the electrical signals are expected to fall, said means for acquiring being located within a housing and including a means for receiving the unfiltered electrical signals in analog form and converting the signals into an unfiltered stream of one-bit digital signals that is output at a rate greater than twice the rate required by the Nyquist principle; means for filtering said stream of digital signals to isolate signals of interest from said stream of digital signals, said means for filtering including means for downsampling said stream of digital signals; means for transmitting said unfiltered electrical signals from said means for acquiring to said means for filtering.
PCT/US1993/009763 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions WO1994008507A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002146979A CA2146979C (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions
EP93923860A EP0665728A4 (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions.
AU53702/94A AU5370294A (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/961,525 US5368041A (en) 1992-10-15 1992-10-15 Monitor and method for acquiring and processing electrical signals relating to bodily functions
US07/961,525 1992-10-15

Publications (2)

Publication Number Publication Date
WO1994008507A1 WO1994008507A1 (en) 1994-04-28
WO1994008507B1 true WO1994008507B1 (en) 1994-05-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/009763 WO1994008507A1 (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions

Country Status (5)

Country Link
US (2) US5368041A (en)
EP (2) EP0665728A4 (en)
AU (1) AU5370294A (en)
CA (1) CA2146979C (en)
WO (1) WO1994008507A1 (en)

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