METHOD FOR PROJECTING BLOOD LOSS OF A PATIENT DURING A SURGERY

• US 20160331248A1
• Filed: 05/13/2016
• Published: 11/17/2016
• Est. Priority Date: 05/15/2015
• Status: Active Grant

• Current Assignee: Gauss Surgical, Inc. (Stryker Corporation)
• Original Assignee: Gauss Surgical, Inc. (Stryker Corporation)
• Inventors: DE, Titas, SATISH, Siddarth, MILLER, Kevin
• Granted Patent: US 10,555,675 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 2576/00 Medical imaging apparatus involving image processing or analysis A61B1/00009, A61B6/52 and A61B8/52 take precedence; image processing per se G06T; details of algorithms for analysing medical images G06T7/0012
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/02042 Determining blood loss or bleeding, e.g. during a surgical procedure
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/7445 Display arrangements, e.g. multiple display units
• CPC Class Codes: A61B 90/361 Image-producing devices, e.g. surgical cameras
• CPC Class Codes: G06T 2207/30004 Biomedical image processing
• CPC Class Codes: G06T 2207/30024 Cell structures in vitro; Tissue sections in vitro
• CPC Class Codes: G06T 7/0012 Biomedical image inspection
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/70 for mining of medical data, e.g. analysing previous cases of other patients

Abstract

Systems for monitoring blood loss include a display for simultaneously depicting a current blood loss metric at different time points or along a time line. In addition, historical or comparative blood loss information is provided on the display so that the healthcare provider can see assess the current blood loss metric relative to other metrics, so that the healthcare provider can more accurately assess and manage the patient'"'"'s status.

Claims

1. A method of patient monitoring, comprising:

displaying on an estimate of real-time blood loss value for a patient corresponding to a first time point of a current surgical procedure;

displaying an updated estimate of real-time blood loss value for the patient corresponding to a second time point after the first time point; and

displaying at least one reference blood loss value corresponding to the first time point, the second time point, or a third time point after the second time point.

2. The method of claim 1, wherein the set of reference blood loss values is provided by selecting at least one data set from a database of prior surgical procedures.

3. The method of claim 1, wherein the estimate of blood loss and the updated estimate of blood loss are displayed simultaneously on a monitor screen.

4. The method of claim 1, wherein the estimate of blood loss and the updated estimate of real-time blood loss are provided on a two-dimensional plot.

5. The method of claim 4, wherein the two-dimensional plot depicts estimated blood loss over time.

6. The method of claim 4, wherein the set of reference blood loss values are provided on the two-dimensional plot.

7. The method of claim 3, wherein displaying the set of reference blood loss values comprises displaying at least one blood loss tracing over time.

8. The method of claim 7, wherein each of the at least one blood loss tracings are based upon a single historical surgical procedure.

9. The method of claim 8, wherein displaying the set of reference blood loss values comprises displaying a plurality of database blood loss tracings over time.

10. The method of claim 6, wherein the set of reference blood loss values are provided as at least one band plot on the two-dimensional plot.

11. The method of claim 10, wherein the at least one band plot comprises a plurality of nested confidence bands on the two-dimensional plot.

12. The method of claim 6, wherein the estimate of real-time blood loss and updated estimate of blood loss are overlayed on the set of comparative blood loss values.

13. The method of claim 1, further comprising receiving the set of reference blood loss values from a remote server.

14. The method of claim 1, further comprising selecting the set of reference blood loss values based upon the surgical procedure.

15. The method of claim 1, further comprising selecting the set of reference blood loss values based upon one or more patient factors.

16. The method of claim 15, further comprising selecting the set of reference blood loss values based upon one or more health condition or disease factors, or practice-based factors.

17. The method of claim 16, wherein the set of reference blood loss values are an average, median, mode or a range of historical blood loss values from a plurality of prior surgical procedures.

18. The method of claim 17, wherein each of the plurality of prior surgical procedures are the same as the current surgical procedure.

19. The method of claim 18, wherein the plurality of prior surgical procedures are surgical procedures selected based upon the n closest blood loss tracings based upon a curve-of-best-fit to a current blood loss tracing that includes the estimate of blood loss and the updated estimate of blood loss.

20. The method of claim 19, wherein n is between 1 and 50.

21. The method of claim 19, wherein n is between 1 and 10.

22. The method of claim 1, further comprising:

comparing the updated estimate of blood loss value to a threshold value; and

displaying a message, different from the estimate of real-time blood loss, the updated estimate of blood loss and the set of comparative blood loss values, if the threshold value is met or exceeded.

23. The method of claim 22, wherein the threshold value is a time-dependent threshold value.

24. The method of claim 22, wherein the threshold value is determined by the set of reference blood loss values.

25. The method of claim 22, wherein the message is a clinical message indicating that a blood transfusion threshold has been met.

26. The method of claim 22, wherein the message is a clinical message indicating that a blood transfusion threshold is estimated to be met at a future time point.

27. The method of claim 1, wherein the at least one reference blood loss value is at least one predicted future blood loss value corresponding to a third time point.

28. The method of claim 27, wherein the at least one predicted future blood loss value comprises providing at least two predicted future blood loss values, wherein one of the least two predicted future blood loss values is a lower limited predicted future blood loss value at the third time point.

29. The method of claim 28, wherein displaying at least one reference blood loss value corresponding to the first time point, comprising displaying at least one predicted future blood loss tracing that includes the at least one predicted future blood loss value at the third time point.

30. The method of claim 27, wherein displaying at least one predicted future blood loss value comprises displaying a predicted future blood loss area plot that includes the at least one predicted future blood loss value at the third time point.

31. The method of claim 30, wherein the predicted future blood loss area plot is bound by the updated estimate of blood loss value at the second time point.

32. A patient monitoring system, comprising:

a camera configured to generate blood loss images from a surgical procedure; and

one or more processors configured to;

display updated estimated blood loss information for at least two time points on an information display, wherein the estimated blood loss information is generated from the blood loss images, and to

display reference blood loss information on the information display, wherein the reference blood loss information comprises a plurality of blood loss values over different time points of at least one different surgical procedure.

33. The patient monitoring system of claim 32, further comprising a display, provided in a housing with the camera.

34. The patient monitoring system of claim 33, wherein the one or more processors are further configured to select the plurality of blood loss values over different time points of at least one different surgical procedure from a database of prior surgical procedures.

35. The patient monitoring system of claim 32, wherein the one or more processors are configured to simultaneously display the updated estimated blood loss information and the reference blood loss information on a monitor screen.

36. The patient monitoring system of claim 35, wherein the updated estimated blood loss information and the reference blood loss information are provided on a two-dimensional plot.

37. The patient monitoring system of claim 36, wherein the two-dimensional plot depicts estimated blood loss over time.

38. The patient monitoring system of claim 36, wherein the reference blood loss information is at least one blood loss tracing over time.

39. The patient monitoring system of claim 35, wherein the updated estimated blood loss information and the reference blood loss information are overlayed on a graph.

40. The patient monitoring system of claim 32, wherein at least one of the one or more processors is provided on a remote server separate from the camera.

41. The patient monitoring system of claim 34, wherein the one or more processors are further configured to select the plurality of blood loss values over different time points by filtering with one or more patient factors.

42. The patient monitoring system of claim 41, wherein the one or more processors are further configured to select the plurality of blood loss values over different time points by further filtering with one or more health condition or disease factors, or practice-based factors.

43. The patient monitoring system of claim 32, wherein the one or more processors are further configured to:

compare the updated estimate of blood loss value to a threshold value; and

display a message, different from the estimate of real-time blood loss, the updated estimate of blood loss and the set of comparative blood loss values, if the threshold value is met or exceeded.

44. The patient monitoring system of claim 43, wherein the message is a clinical message indicating that a blood transfusion threshold has been met.

45. The patient monitoring system of claim 43, wherein the message is a clinical message indicating that a blood transfusion threshold is estimated to be met at a future time point.

46. The patient monitoring system of claim 32, wherein the reference blood loss information is at least one predicted future blood loss value corresponding to a third time point.

47. The patient monitoring system of claim 46, wherein the at least one predicted future blood loss value comprises providing at least two predicted future blood loss values, wherein one of the least two predicted future blood loss values is a lower limited predicted future blood loss value at the third time point.

48. The patient monitoring system of claim 47, wherein the display of at least one reference blood loss value corresponding to the first time point, comprises the display of at least one predicted future blood loss tracing that includes the at least one predicted future blood loss value at the third time point.

49. The patient monitoring system of claim 47, wherein the display of at least one predicted future blood loss value comprises the displaying of at least one a predicted future blood loss area plot that includes the at least one predicted future blood loss value at the third time point.

50. The patient monitoring system of claim 49, wherein the predicted future blood loss area plot is bound by the updated estimate of blood loss value at the second time point.