SYSTEM AND METHOD FOR PREDICTING NEAR-TERM PATIENT TRAJECTORIES

• US 20120041277A1
• Filed: 08/12/2010
• Published: 02/16/2012
• Est. Priority Date: 08/12/2010
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hu, Jianying, Sorrentino, Robert K., Sow, Daby M., Sun, Jimeng, EBADOLLAHI, SHAHRAM
• Application Number:
  US12/855,068
• Publication Number:
  US 20120041277A1
• Time in Patent Office: Days
• 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 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: G16H 50/70 for mining of medical data, e.g. analysing previous cases of other patients

Abstract

A system and method for predicting near term measurements of a patient includes a stream processor configured to summarize raw measurements from patients into signatures and construct optimal prediction models based on previously obtained signatures. A similar patient tracker is configured to monitor similar patient information for a query patient. The similar patient information is determined based on a similarity between the query patient and signatures of other patients. A model analyzer is configured to employ retrofitted optimal prediction models from similar patients to predict near term measurements of the query patient.

Claims

1. A system to predict near term measurements of a patient, comprising:

a stream processor configured to summarize raw measurements from patients into signatures and construct optimal prediction models using previously obtained signatures;

a similar patient tracker configured to monitor similar patient information relative to a query patient, the similar patient information being determined based on a similarity between the query patient and the signatures of other patients; and

a model analyzer configured to employ retrofitted optimal prediction models from similar patients to predict near term measurements of the query patient.

2. The system as recited in claim 1, wherein the stream processor summarizes raw measurements in real-time or near real-time.

3. The system as recited in claim 1, wherein the signatures include frequency domain coefficients which represent time windows of a time series of measurements representing health status for a given patient.

4. The system as recited in claim 3, wherein the time series of measurements includes one or more of heart rate, blood pressure, blood oxygen, electrocardiogram information and temperature.

5. The system as recited in claim 1, wherein the similar patient tracker updates which optimal prediction models that are employed to predict near term measurements of the query patient based upon current conditions of the query patient.

6. The system as recited in claim 5, wherein the model analyzer determines a set of top similar patients and feeds back this information to enable the similar patient tracker to update the optimal prediction models.

7. The system as recited in claim 6, wherein the model analyzer employs prediction error as feedback for updating the optimal prediction models.

8. The system as recited in claim 1, wherein the stream processor constructs a regression model using patient signatures to construct the optimal prediction models.

9. The system as recited in claim 1, wherein the model analyzer employs an ensemble model from the retrofitted optimal prediction models to create the prediction model.

10. The system as recited in claim 1, wherein the ensemble model includes weighted averages of all the retrofitted optimal prediction models where weights are proportional to a similarity between the query patient signature and the other patient signatures.

11. A method for predicting near term measurements of a patient, comprising:

summarizing time windows of patient measurements into signatures;

retrofitting optimal prediction models based on historical measurements;

tracking similar patients and signatures of the similar patients for a query patient;

constructing a predictive model of the query patient using the optimal models from the similar patients; and

predicting a near-term measurement for the query patient based on the predictive model.

12. The method as recited in claim 11, wherein summarizing time windows includes summarizing raw measurements in real-time or near real-time.

13. The method as recited in claim 11, wherein the signatures include frequency domain coefficients which represent the time windows of a time series of measurements representing health status for a given patient.

14. The method as recited in claim 13, wherein the time series of measurements includes one or more of heart rate, blood pressure, blood oxygen, electrocardiogram information and temperature.

15. The method as recited in claim 11, wherein constructing includes updating which of the optimal prediction models are employed to predict near term measurements of the query patient based upon current conditions of the query patient.

16. The method as recited in claim 15, further comprising providing feedback of a set of top similar patients to enable updates to the optimal prediction models.

17. The method as recited in claim 16, wherein the feedback includes prediction error for updating the optimal prediction models.

18. The method as recited in claim 11, wherein retrofitting optimal prediction models includes constructing a regression model using patient signatures to construct the optimal prediction models.

19. The method as recited in claim 11, wherein constructing a predictive model includes employing an ensemble model from the retrofitted optimal prediction models to create the prediction model.

20. The method as recited in claim 19, wherein the ensemble model includes weighted averages of all the retrofitted optimal prediction models where weights are proportional to a similarity between the query patient signature and the other patient signatures.

21. A computer readable storage medium comprising a computer readable program for predicting near term measurements of a patient, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:

summarizing time windows of patient measurements into signatures;

retrofitting optimal prediction models based on historical measurements;

tracking similar patients and signatures of the similar patients for a query patient;

constructing a predictive model of the query patient using the optimal models from the similar patients; and

predicting a near-term measurement for the query patient based on the predictive model.

22. The computer readable storage as recited in claim 21, wherein summarizing time windows includes summarizing raw measurements in real-time or near real-time,

23. The computer readable storage as recited in claim 21, wherein the signatures include frequency domain coefficients which represent the time windows of a time series of measurements representing health status for a given patient.

24. The computer readable storage as recited in claim 23, wherein the time series of measurements includes one or more of heart rate, blood pressure, blood oxygen, electrocardiogram information and temperature.

25. The computer readable storage as recited in claim 21, wherein constructing a predictive model includes employing an ensemble model from the retrofitted optimal prediction models to create the prediction model, wherein the ensemble model includes weighted averages of all the retrofitted optimal prediction models where weights are proportional to a similarity between the query patient signature and the other patient signatures.