System for processing signal data representing physiological parameters

• US 6,773,397 B2
• Filed: 09/19/2002
• Issued: 08/10/2004
• Est. Priority Date: 10/11/2001
• Status: Expired due to Term

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Draeger Medical Systems Incorporated (Dragerwerk AG)
• Inventors: Kelly, Clifford Mark
• Primary Examiner(s): Jones, Mary Beth
• Assistant Examiner(s): Mallari, Patricia C.
• Application Number:
  US10/247,424
• Publication Number:
  US 20030088184A1
• Time in Patent Office: 691 Days
• Field of Search: 600/300-301, 600/323, 600/324, 600/481, 600/485, 600/500-504, 600/508, 600/509, 600/528, 600/529, 600/544-546, 600/549
• US Class Current: 600/301
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters

Abstract

Determination of a physiological parameter value includes reception of several signals, each representing a respective one of several physiological parameters and including a pulsation associated with the parameter. A system detects a pulsation associated with a physiological parameter. The system includes an input device for receiving a plurality of different signals, each of the plurality of different signals indicating a pulsation in respective different physiological parameters. A signal processor detects and accumulates information from the plurality of different signals. The accumulated information including values of relative delay between the pulsation in the respective different parameters. A timing processor determines a timing of the pulsation in at least one of the different parameters based at least on the accumulated information. The physiological parameters include parameters associated with at least two of, non-invasive blood pressure, invasive blood pressure, heart beat, blood oxygen saturation level, respiration rate, an ECG and temperature.

Claims

1. A system for detecting a pulsation associated with a physiological parameter, comprising:

an input device for receiving a plurality of different signals, each of the plurality of different signals indicating a pulsation in respective different physiological parameters;

a signal processor for detecting and accumulating information from the plurality of different signals, the information including values of relative delay between pulsations in the respective different parameters; and

a timing processor for determining a timing of the pulsation in at least one of the different parameters based at least on the accumulated information;

wherein

the plurality of different signals comprises at least two of (a) an electrocardiogram signal, (b) a blood oxygen saturation representative signal, (c) an invasive blood pressure representative signal, and (d) a non-invasive blood pressure representative signal.

2. A system according to claim 1, wherein

the physiological parameters comprise parameter associated with at least two of non-invasive blood pressure, invasive blood pressure, heart beat, blood oxygen saturation level, respiration rate, an ECG (Electro-CardioGraph) and temperature.

3. A system for detecting a pulsation associated with a physiological parameter, comprising:

an input device for receiving a plurality of different signals, each of the plurality of different signals indicating a pulsation in respective different physiological parameters;

a signal processor for detecting and accumulating information from the plurality of different signals, the information including values of relative delay between the pulsation in the respective different parameters; and

a timing processor for determining a timing of the pulsation in at least one of the

different parameters based at least on the accumulated information and on information derived from different sources, wherein the signal processor appends information from patient monitoring sources to a patent record in response to patient admission and stores the appended information for future use and the signal processor appends information from patient monitoring sources to a patient record when the plurality of different signals are determined to exceed a predetermined quality threshold.

4. A system for detecting a pulsation associated with a physiological parameter, comprising:

an input device for receiving a plurality of different signals, each of the plurality of different signals indicating a pulsation in respective different physiological parameters;

a signal processor for detecting and accumulating information from the plurality of different signals, the information including values of relative delay between pulsations in the respective different parameters; and

a timing processor for determining a timing of the pulsation in at least one of the different parameters based at least on the accumulated information and on information derived from different sources,

the signal processor appends information from patient monitoring sources to a patient record when the plurality of different signals are determined to exceed a predetermined quality threshold.

5. A system according to claim 4, wherein

the signal processor appends information from patient monitoring sources to a patient record in response to patient admission and stores the appended information for future use.

6. A method for determining a value of a physiological parameter, comprising:

receiving a plurality of signals, each of said plurality of signals representing a respective one of a plurality of physiological parameters and comprising a pulsation associated with a corresponding parameter of said plurality of physiological parameters; and

determining, for each of a plurality of combinations of parameters for a particular patient, a temporal relationship between corresponding pulsations associated with different parameters of said plurality of combinations of parameters, said plurality of combinations of parameters comprising a heart beat associated parameter in combination with a parameter associated with at least one of, (a) non-invasive blood pressure, (b) invasive blood pressure, (c) blood oxygen saturation level and (d) respiration rate.

7. A method according to claim 6, wherein said plurality of combinations of parameters comprise a heart beat associated parameter in combination with a parameter associated with at least one of, (i) a cardiac ultrasound pulsation, (ii) temperature and (iii) an ECG.

8. A method according to claim 6, wherein said step of determining said temporal relationship between said corresponding pulsations comprises:

detecting and accumulating information from said plurality of different signals, said information including values of relative delay between corresponding pulsations associated with said different parameters of said plurality of combinations of parameters, and

determining a timing of a pulsation in at least one of said different parameters based at least on said accumulated information.

9. A method according to claim 6, further comprising:

Identifying and indicating when said plurality of different signals representing said plurality of combinations of parameters are determined to exceed a predetermined quality threshold.

10. A method for determining a value of a physiological parameter, comprising:

receiving a signal representing a first parameter of a plurality of physiological parameters;

receiving at least one signal respectively representing at least one other of the plurality of physiological parameters;

determining at least one value respectively associated with the first parameter;

determining values of a plurality of the at least one other of the physiological parameters based on the received at least one signal;

identifying a combination of values based on the determined values;

identifying a temporal relationship associated with the identified combination of values; and

determining a pulsation associated with the signal representing the first parameter based at least on the determined temporal relationship;

determining ratings corresponding to values representing said plurality of physiological parameters, and

selecting at least one parameter value based at least on said determined ratings.

11. A method according to claim 10, wherein

said step of determining at least one value and said step of determining values, both determine values associated with pulsation.

12. A device comprising a memory storing processor-executable process steps and a processor in communication with the memory and operative in conjunction with the stored process steps to perform the steps of claim 10.

13. A method according to claim 10, wherein

said combination of values comprise a heart beat associated value in combination with a value associated with at least one of, (a) non-invasive blood pressure, (b) blood oxygen saturation level, (c) respiration rate (d) a cardiac ultrasound pulsation, (e) an ECG and (e) temperature.