INTRAVENOUS DRIP MONITORING METHOD AND RELATED INTRAVENOUS DRIP MONITORING SYSTEM

• US 20110144595A1
• Filed: 06/02/2010
• Published: 06/16/2011
• Est. Priority Date: 12/11/2009
• Status: Abandoned Application

• Current Assignee: Primax Electronics Limited
• Original Assignee: Primax Electronics Limited
• Inventors: Cheng, Ting-Yuan
• Application Number:
  US12/791,885
• Publication Number:
  US 20110144595A1
• Time in Patent Office: Days
• US Class Current: 604/253
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 5/1689 Drip counters
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281

Abstract

The present invention provides an intravenous drip monitoring method and related intravenous drip monitoring system. The intravenous drip monitoring method comprises: providing a background color as a background of a flow regulating device of an intravenous drip; obtaining a plurality of frames in the flow regulating device of the intravenous drip in accordance of a frame rate; performing an image processing operation on the plurality of frames to obtain brightness variations generated by motion drips in the flow regulating device; utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a dropping frequency of the intravenous drip in a first detecting area of the flow regulating device; and utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device.

Claims

1. An intravenous drip monitoring method, comprising:

providing a background color as a background of a flow regulating device of an intravenous drip;

obtaining a plurality of frames in the flow regulating device of the intravenous drip in accordance of a frame rate;

performing an image processing operation on the plurality of frames to obtain brightness variations generated by motion drips in the flow regulating device;

utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a dropping frequency of the intravenous drip in a first detecting area of the flow regulating device; and

utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device.

2. The intravenous drip monitoring method of claim 1, further comprising:

utilizing the brightness variations generated by the motion drips in the flow regulating device to define the first detecting area and the second detecting area.

3. The intravenous drip monitoring method of claim 2, wherein the step of utilizing the brightness variations generated by the motion drips in the flow regulating device to define the first detecting area and the second detecting area comprises:

utilizing the brightness variations generated by the motion drips in the flow regulating device to find a drip dropping starting point in an upper area of the flow regulating device;

defining an area around the drip dropping starting point as the first detecting area;

utilizing the brightness variations generated by the motion drips in the flow regulating device to find a liquid surface in a lower area of the flow regulating device; and

defining an area around the water surface as the second detecting area.

4. The intravenous drip monitoring method of claim 1, wherein the step of utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the dropping frequency of the intravenous drip in a first detecting area of the flow regulating device comprises:

defining at least a detecting sub-area in the first detecting area;

detecting numbers of motion blocks in the detecting sub-area;

when observing the numbers of motion blocks respectively exceeding a threshold at a plurality of time points, labeling the plurality of time points as a plurality of peak occurring time points;

calculating an average distance between the plurality of peak occurring time points; and

detecting the dropping frequency of the intravenous drip in accordance with the average distance and following peak occurring time points.

5. The intravenous drip monitoring method of claim 4, wherein the step of detecting the dropping frequency of the intravenous drip in accordance with the average distance and the following peak occurring time points comprises:

setting a first observing window at each time point spaced at an interval of the average distance;

in a first state, determining whether a peak occurring time point appears in a current first observing window, wherein;

when the peak occurring time point does not appear in the current first observing window, keeping in the first state and adjusting the frame rate, and calculating the average distance again; and

when the peak occurring time point appears in the current first observing window, entering a second state;

in the second state, determining whether a peak occurring time point appears in a current first observing window and determining whether a first number of accumulating times of the peak occurring time points greater than a first predetermined number, wherein;

when the peak occurring time point does not appear in the current first observing window, go back to the first state and calculating the average distance again;

when the peak occurring time point appears in the current first observing window, and the first number of accumulating times of the peak occurring time points is smaller than the first predetermined number, keeping in the second state; and

when the peak occurring time point appears in the current first observing window, and the first number of accumulating times of the peak occurring time points is not smaller than the first predetermined number, entering a third state;

in the third state, calculating an actual distance per two peak occurring time points to calculating an actual average distance per two peak occurring time points, setting a second observing window at each time point spaced at an interval of the actual average distance, and determining whether a peak occurring time point appears in a current second observing window, wherein;

when the peak occurring time point does not appear in the current second observing window, entering a fourth state; and

when the peak occurring time point appears in the current second observing window, keeping in the third state;

in the fourth state, determining whether a peak occurring time point appears in a current second observing window and determining whether a second number of accumulating times of the peak occurring time points greater than a second predetermined number, wherein;

when the peak occurring time point does not appear in the current second observing window, go back to the third state;

when the peak occurring time point does not appear in the current second observing window, and the second number of accumulating times of the peak occurring time points is greater than the second predetermined number, entering the first state; and

when the peak occurring time point does not appear in the current second observing window, and the second number of accumulating times of the peak occurring time points is not greater than the second predetermined number, keeping in the fourth state.

6. The intravenous drip monitoring method of claim 5, wherein the step of utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device comprises:

defining a plurality of detecting sub-areas in the second detecting area from top to bottom;

observing numbers of motion blocks generated by the motion drips of the flow regulating device passing through the plurality of detecting sub-areas during a specific period;

when observing the numbers of motion blocks in a detecting sub-area of the plurality of detecting sub-areas exceeding a threshold, updating a number of peak accumulating times corresponding to the detecting sub-area; and

determining the liquid horizontal height of the flow regulating device in accordance with a plurality of numbers of peak accumulating times corresponding to at least the plurality of detecting sub-areas.

7. The intravenous drip monitoring method of claim 6, wherein the step of determining the liquid horizontal height of the flow regulating device comprises:

performing a weighted averages process to determine the liquid horizontal height of the flow regulating device in accordance with the plurality of numbers of peak accumulating times and heights of the plurality of detecting sub-areas.

8. The intravenous drip monitoring method of claim 6, wherein the step of determining the liquid horizontal height of the flow regulating device comprises:

determining the liquid horizontal height of the flow regulating device in accordance with a detecting sub-area having a largest peak accumulating time of the plurality of detecting sub-areas.

9. The intravenous drip monitoring method of claim 6, further comprising:

determining whether to output a warning message in accordance with the dropping frequency and the liquid horizontal height.

10. The intravenous drip monitoring method of claim 9, wherein the step of determining whether to output the warning message comprises:

when remaining in the third state and an actual average distance between every two peak occurring time points is smaller than a determined distance, outputting a warning message to warn that the dropping frequency is too high.

11. The intravenous drip monitoring method of claim 9, wherein the step of determining whether to output the warning message comprises:

when remaining in the third state and an actual average distance between every two peak occurring time points is greater than a determined distance, outputting a warning message to warn that the dropping frequency is too low.

12. The intravenous drip monitoring method of claim 9, wherein the step of determining whether to output the warning message comprises:

when entering to the fourth state from the first state, outputting a warning message to warn that the intravenous drip stops to drip.

13. The intravenous drip monitoring method of claim 9, wherein the step of determining whether to output the warning message comprises:

when entering to the fourth state from the first state and the liquid horizontal height of the flow regulating device is lower than a determined height, outputting a warning message to warn that the intravenous drip is empty.

14. The intravenous drip monitoring method of claim 9, wherein the step of determining whether to output the warning message comprises:

when entering to the fourth state from the first state and the liquid horizontal height of the flow regulating device does not have any variation, outputting a warning message to warn that a tube of the intravenous drip is jammed.

15. The intravenous drip monitoring method of claim 4, wherein the step of utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the dropping frequency of the intravenous drip in a first detecting area of the flow regulating device further comprises:

Observing the numbers generated by the motion drips in the flow regulating device passing the detecting sub-area, and setting the threshold accordingly.

16. The intravenous drip monitoring method of claim 1, wherein the step of utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device comprises:

defining a plurality of detecting sub-areas in the second detecting area from top to bottom;

observing numbers of motion blocks generated by the motion drips of the flow regulating device passing through the plurality of detecting sub-areas during a specific period;

when observing the numbers of motion blocks in a detecting sub-area of the plurality of detecting sub-areas exceeding a threshold, updating a number of peak accumulating times corresponding to the detecting sub-area; and

determining the liquid horizontal height of the flow regulating device in accordance with a plurality of numbers of peak accumulating times corresponding to at least the plurality of detecting sub-areas.

17. The intravenous drip monitoring method of claim 16, wherein the step of determining the liquid horizontal height of the flow regulating device comprises:

performing a weighted averages process to determine the liquid horizontal height of the flow regulating device in accordance with the plurality of numbers of peak accumulating times and heights of the plurality of detecting sub-areas.

18. The intravenous drip monitoring method of claim 16, wherein the step of determining the liquid horizontal height of the flow regulating device comprises:

determining the liquid horizontal height of the flow regulating device in accordance with a detecting sub-area having a largest peak accumulating time of the plurality of detecting sub-areas.

19. An intravenous drip monitoring system, comprising:

an image obtaining device, positioned in a side of a flow regulating device of an intravenous drip, utilized for obtaining a plurality of frames in the flow regulating device of the intravenous drip;

a color plate, positioned in a side of a flow regulating device of an intravenous drip, utilized for providing a background color as a background of a flow regulating device of an intravenous drip; and

an image processing device, coupled to the image obtaining device, utilized for;

obtaining a plurality of frames in the flow regulating device of the intravenous drip in accordance of a frame rate;

performing an image processing operation on the plurality of frames to obtain brightness variations generated by motion drips in the flow regulating device;

utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a dropping frequency of the intravenous drip in a first detecting area of the flow regulating device; and

utilizing the brightness variations generated by the motion drips in the flow regulating device to detect a liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device.

20. The intravenous drip monitoring system of claim 19, wherein the image processing device is further utilized for:

utilizing the brightness variations generated by the motion drips in the flow regulating device to define the first detecting area and the second detecting area.

21. The intravenous drip monitoring system of claim 20, wherein the function of the image processing device for utilizing the brightness variations generated by the motion drips in the flow regulating device to define the first detecting area and the second detecting area comprises:

utilizing the brightness variations generated by the motion drips in the flow regulating device to find a drip dropping starting point in an upper area of the flow regulating device;

defining an area around the drip dropping starting point as the first detecting area;

utilizing the brightness variations generated by the motion drips in the flow regulating device to find a liquid surface in a lower area of the flow regulating device; and

defining an area around the water surface as the second detecting area.

22. The intravenous drip monitoring system of claim 19, wherein the function of the image processing device for utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the dropping frequency of the intravenous drip in a first detecting area of the flow regulating device comprises:

defining at least a detecting sub-area in the first detecting area;

detecting numbers of motion blocks in the detecting sub-area;

when observing the numbers of motion blocks respectively exceeding a threshold at a plurality of time points, labeling the plurality of time points as a plurality of peak occurring time points;

calculating an average distance between the plurality of peak occurring time points; and

detecting the dropping frequency of the intravenous drip in accordance with the average distance and following peak occurring time points.

23. The intravenous drip monitoring system of claim 22, wherein the function of the image processing device for detecting the dropping frequency of the intravenous drip in accordance with the average distance and the following peak occurring time points comprises:

setting a first observing window at each time point spaced at an interval of the average distance;

in a first state, determining whether a peak occurring time point appears in a current first observing window, wherein;

when the peak occurring time point does not appear in the current first observing window, keeping in the first state and adjusting the frame rate, and calculating the average distance again; and

when the peak occurring time point appears in the current first observing window, entering a second state;

in the second state, determining whether a peak occurring time point appears in a current first observing window and determining whether a first number of accumulating times of the peak occurring time points greater than a first predetermined number, wherein;

when the peak occurring time point does not appear in the current first observing window, go back to the first state and calculating the average distance again;

when the peak occurring time point appears in the current first observing window, and the first number of accumulating times of the peak occurring time points is smaller than the first predetermined number, keeping in the second state; and

when the peak occurring time point appears in the current first observing window, and the first number of accumulating times of the peak occurring time points is not smaller than the first predetermined number, entering a third state;

in the third state, calculating an actual distance per two peak occurring time points to calculating an actual average distance per two peak occurring time points, setting a second observing window at each time point spaced at an interval of the actual average distance, and determining whether a peak occurring time point appears in a current second observing window, wherein;

when the peak occurring time point does not appear in the current second observing window, entering a fourth state; and

when the peak occurring time point appears in the current second observing window, keeping in the third state;

in the fourth state, determining whether a peak occurring time point appears in a current second observing window and determining whether a second number of accumulating times of the peak occurring time points greater than a second predetermined number, wherein;

when the peak occurring time point does not appear in the current second observing window, go back to the third state;

when the peak occurring time point does not appear in the current second observing window, and the second number of accumulating times of the peak occurring time points is greater than the second predetermined number, entering the first state; and

when the peak occurring time point does not appear in the current second observing window, and the second number of accumulating times of the peak occurring time points is not greater than the second predetermined number, keeping in the fourth state.

24. The intravenous drip monitoring system of claim 23, wherein the function of the image processing device for utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device comprises:

defining a plurality of detecting sub-areas in the second detecting area from top to bottom;

observing numbers of motion blocks generated by the motion drips of the flow regulating device passing through the plurality of detecting sub-areas during a specific period;

when observing the numbers of motion blocks in a detecting sub-area of the plurality of detecting sub-areas exceeding a threshold, updating a number of peak accumulating times corresponding to the detecting sub-area; and

determining the liquid horizontal height of the flow regulating device in accordance with a plurality of numbers of peak accumulating times corresponding to at least the plurality of detecting sub-areas.

25. The intravenous drip monitoring system of claim 24, wherein the function of the image processing device for determining the liquid horizontal height of the flow regulating device comprises:

performing a weighted averages process to determine the liquid horizontal height of the flow regulating device in accordance with the plurality of numbers of peak accumulating times and heights of the plurality of detecting sub-areas.

26. The intravenous drip monitoring system of claim 24, wherein the function of the image processing device for determining the liquid horizontal height of the flow regulating device comprises:

determining the liquid horizontal height of the flow regulating device in accordance with a detecting sub-area having a largest peak accumulating time of the plurality of detecting sub-areas.

27. The intravenous drip monitoring system of claim 24, wherein the image processing device is further utilized for:

determining whether to output a warning message in accordance with the dropping frequency and the liquid horizontal height.

28. The intravenous drip monitoring system of claim 27, wherein the function of the image processing device for determining whether to output the warning message comprises:

when remaining in the third state and an actual average distance between every two peak occurring time points is smaller than a determined distance, outputting a warning message to warn that the dropping frequency is too high.

29. The intravenous drip monitoring system of claim 27, wherein the function of the image processing device for determining whether to output the warning message comprises:

when remaining in the third state and an actual average distance between every two peak occurring time points is greater than a determined distance, outputting a warning message to warn that the dropping frequency is too low.

30. The intravenous drip monitoring system of claim 27, wherein the function of the image processing device for determining whether to output the warning message comprises:

when entering to the fourth state from the first state, outputting a warning message to warn that the intravenous drip stops to drip.

31. The intravenous drip monitoring system of claim 27, wherein the function of the image processing device for determining whether to output the warning message comprises:

when entering to the fourth state from the first state and the liquid horizontal height of the flow regulating device is lower than a determined height, outputting a warning message to warn that the intravenous drip is empty.

32. The intravenous drip monitoring system of claim 27, wherein the function of the image processing device for determining whether to output the warning message comprises:

when entering to the fourth state from the first state and the liquid horizontal height of the flow regulating device does not have any variation, outputting a warning message to warn that a tube of the intravenous drip is jammed.

33. The intravenous drip monitoring system of claim 23, wherein the function of the image processing device for utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the dropping frequency of the intravenous drip in a first detecting area of the flow regulating device further comprises:

Observing the numbers generated by the motion drips in the flow regulating device passing the detecting sub-area, and setting the threshold accordingly.

34. The intravenous drip monitoring system of claim 19, wherein the function of the image processing device for utilizing the brightness variations generated by the motion drips in the flow regulating device to detect the liquid horizontal height of the flow regulating device in a second detecting area of the flow regulating device comprises:

defining a plurality of detecting sub-areas in the second detecting area from top to bottom;

observing numbers of motion blocks generated by the motion drips of the flow regulating device passing through the plurality of detecting sub-areas during a specific period;

when observing the numbers of motion blocks in a detecting sub-area of the plurality of detecting sub-areas exceeding a threshold, updating a number of peak accumulating times corresponding to the detecting sub-area; and

determining the liquid horizontal height of the flow regulating device in accordance with a plurality of numbers of peak accumulating times corresponding to at least the plurality of detecting sub-areas.

35. The intravenous drip monitoring system of claim 34, wherein the function of the image processing device for determining the liquid horizontal height of the flow regulating device comprises:

performing a weighted averages process to determine the liquid horizontal height of the flow regulating device in accordance with the plurality of numbers of peak accumulating times and heights of the plurality of detecting sub-areas.

36. The intravenous drip monitoring system of claim 34, wherein the function of the image processing device for determining the liquid horizontal height of the flow regulating device comprises:

determining the liquid horizontal height of the flow regulating device in accordance with a detecting sub-area having a largest peak accumulating time of the plurality of detecting sub-areas.

37. The intravenous drip monitoring system of claim 19, wherein the image processing device is a digital camera or a web cam.