METHOD AND APPARATUS FOR ENABLING CONTINUOUS DATA ACQUISITION ACROSS MULTIPLE STAGES OF CARE

• US 20130012785A1
• Filed: 07/07/2011
• Published: 01/10/2013
• Est. Priority Date: 07/07/2011
• Status: Abandoned Application

• Current Assignee: CareFusion 209, Inc.
• Original Assignee: CareFusion 209, Inc.
• Inventors: Quinlivan, Linda, LOMBARDI, Daniel J., King, William S., Schluter, Ronald, Kolasa, William E., Klossner, Patricia, Garz, Eric T.
• Application Number:
  US13/178,275
• Publication Number:
  US 20130012785A1
• Time in Patent Office: Days
• US Class Current: 600/301
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/0024 for multiple sensor units attached to the patient, e.g. using a body or personal area network
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
• CPC Class Codes: A61B 5/24 Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
• CPC Class Codes: H03F 2200/261 Amplifier which being suitable for instrumentation applications
• CPC Class Codes: H03F 2203/45138 Two or more differential amplifiers in IC-block form are combined, e.g. measuring amplifiers
• CPC Class Codes: H03F 3/45475 using IC blocks as the active amplifying circuit

Abstract

A data acquisition device for providing continuous data acquisition across a plurality of stages of care through a plurality of functioning modes is disclosed. The data acquisition device includes two inputs coupled to an instrumentation amplifier, wherein each input provides an input signal to the instrumentation amplifier, a mode selection module coupled to the instrumentation amplifier, operable to select either an AC mode or one of a plurality of DC modes for processing the input signals, wherein the mode is determined based at least in part on analyzing at least one of a plurality of parameters associated with a plurality of stages of care, and a data collection module operable to process the received signals using the selected mode.

Claims

1. A data acquisition device, comprising:

two inputs coupled to an instrumentation amplifier, wherein each input provides an input signal to the instrumentation amplifier;

a mode selection module, coupled to the instrumentation amplifier, operable to select either an alternating current (AC) mode, or one of a plurality of direct current (DC) modes for processing the input signals, wherein the mode is determined based at least in part on analyzing at least one of a plurality of parameters associated with a plurality of stages of care; and

a data collection module operable to process the received signals using the selected mode.

2. The data acquisition device of claim 1, wherein the selected stage of care of the plurality of stages of care is changed to a different stage of care, and wherein the data collection module is further operable to continuously process the received signals, when the selected stage of care of the plurality of stages of care is changed to the different stage of care.

3. The data acquisition device of claim 2, wherein the mode is changed when the selected stage of care of the plurality of stages of care is changed to the different stage of care.

4. The data acquisition device of claim 1, wherein the plurality of DC modes comprise:

a first DC mode with a first gain and a first level of sensitivity;

a second DC mode with a second gain and a second level of sensitivity, wherein the second gain is greater than the first gain and wherein the second level of sensitivity is greater than the first level of sensitivity; and

a third DC mode with a third gain and a third level of sensitivity, wherein the third gain is greater than the first gain and second gain and wherein the third level of sensitivity is greater than the first level of sensitivity and the second level of sensitivity.

5. The data acquisition device of claim 4, wherein the first gain is within a range of +/−

0.1 of 1.50, the first level of sensitivity is within a range of +/−

0.1 mV of +/−

1.3V, the second gain is within a range of +/−

0.1 of 6.3, the second level of sensitivity is within a range of +/−

25 mV of +/−

325 mV, the third gain is within a range of +/−

0.1 of 12.7, and the third level of sensitivity is within a range of +/−

25 mV of +/−

160 mV.

6. The data acquisition device of claim 1, wherein the AC mode comprises a gain within a range of +/−

10 of 400 and a level of sensitivity within a range of +/−

1 mV of +/−

5 mV.

7. The data acquisition device of claim 1, wherein the plurality of parameters comprise at least two selected from a group consisting of:

input signal sampling rate;

noise in the input signals;

a common mode rejection ratio (CMRR) value;

cost of equipment;

device battery life;

device memory capacity;

device size;

DC offset tolerance;

input bias current; and

bandwidth sensitive range.

8. The data acquisition device of claim 1, wherein the plurality of stages of care comprise at least two selected from a group consisting of:

clinical electroencephalography (EEG) operation;

long term monitoring (LTM) operation;

intensive care unit (ICU) operation;

operating room (OR) operation;

sleep study operation;

research study operation; and

ambulatory operation.

9. The data acquisition device of claim 1, wherein the input signals are used to acquire at least one selected from a group consisting of:

EEG measurements;

transcranial Doppler (TCD) measurements;

perfusion measurements;

intracranial pressure (ICP) measurements;

invasive depth EEG measurements;

blood pressure measurements;

temperature measurements;

heart rate measurements;

Saturation of peripheral oxygen (SpO₂) measurements;

evoked potential measurements; and

vital sign monitoring measurements.

10. The data acquisition device of claim 1, wherein the instrumentation amplifier is powered using a dual supply, and wherein the mode selection module is powered using a single supply.

11. The data acquisition device of claim 10, further comprising:

a data storage module operable to store data associated with at least a portion of the processed signals generated by the data collection module.

12. The data acquisition device of claim 11, further comprising:

a data transmission module operable to transmit at least a portion of the stored data.

13. The data acquisition device of claim 12, wherein the data transmission module is further operable to transmit using at least one selected from a group consisting of:

wireless transmitter;

a wireline connection; and

a fiber optic coupling.

14. The data acquisition device of claim 12, wherein the data transmission module is further operable to transmit through at least one selected from a group consisting of:

continuous transmission;

periodic transmission; and

transmission in response to a received data request.

15. A method of continuously acquiring data, the method comprising:

receiving a selection of a first mode of operation from a plurality of modes, wherein the mode is determined based at least in part on analyzing at least one of a plurality of parameters associated with a plurality of stages of care;

receiving input signals from two inputs;

processing the received input signals using the selected first mode of operation to generate a first data set;

receiving a selection of a second mode of operation from the plurality of modes, wherein the second mode differs from the first mode; and

processing the received input signals using the selected second mode of operation without interruption in receiving the input signals to generate a second data set.

16. The method of claim 15, wherein the receiving a selection of the second mode further comprises:

detecting a change to a new stage of care of the plurality of stages of care; and

selecting the second mode in response to the detected change.

17. The method of claim 15, wherein the plurality of modes of operation comprise an AC mode or one of a plurality of DC modes for processing the input signals.

18. The method of claim 17, wherein the plurality of DC modes comprise:

a first DC mode with a first gain and a first level of sensitivity;

a second DC mode with a second gain and a second level of sensitivity, wherein the second gain is greater than the first gain and wherein the second level of sensitivity is greater than the first level of sensitivity; and

a third DC mode with a third gain and a third level of sensitivity, wherein the third gain is greater than the first gain and second gain and wherein the third level of sensitivity is greater than the first level of sensitivity and the second level of sensitivity.

19. The method of claim 18, wherein the first gain is within a range of +/−

0.1 of 1.50, the first level of sensitivity is within a range of +/−

0.1 mV of +/−

1.3V, the second gain is within a range of +/−

0.1 of 6.3, the second level of sensitivity is within a range of +/−

25 mV of +/−

325 mV, the third gain is within a range of +/−

0.1 of 12.7, and the third level of sensitivity is within a range of +/−

25 mV of +/−

160 mV.

20. The method of claim 17, wherein the AC mode comprises a gain of 406 and a level of sensitivity of +/−

5 mV.

21. The method of claim 15, wherein the plurality of parameters comprise at least two selected from a group consisting of:

input signal sampling rate;

noise in the input signals;

a common mode rejection ratio (CMRR) value;

cost of equipment;

device battery life;

device memory capacity;

device size;

DC offset tolerance;

input bias current; and

bandwidth sensitive range.

22. The method of claim 15, wherein the plurality of stages of care comprise at least two selected from a group consisting of:

clinical electroencephalography (EEG) operation;

long term monitoring (LTM) operation;

intensive care unit (ICU) operation;

operating room (OR) operation;

sleep study operation;

research study operation; and

ambulatory operation.

23. The method of claim 15, wherein the input signals are used to acquire at least one selected from a group consisting of:

EEG measurements;

transcranial Doppler (TCD) measurements;

perfusion measurements;

intracranial pressure (ICP) measurements;

invasive depth EEG measurements;

blood pressure measurements;

temperature measurements;

heart rate measurements;

Saturation of peripheral oxygen (SpO₂) measurements;

evoked potential measurements; and

vital sign monitoring measurements.

24. The method of claim 15, further comprising:

storing at least a portion of the first data set and the second data set; and

transmitting at least a portion of the stored data.

25. The method of claim 24, wherein transmitting of at least a portion of the stored data further comprises:

transmitting wirelessly, through a wireline connection, or via a fiber optic coupling.

26. The method of claim 24, wherein the transmitting further comprises:

transmitting through at least one selected from a group consisting of;

continuous transmission, periodic transmission, and transmission in response to a received data request.