Mask fitting system and method

• US 7,827,038 B2
• Filed: 06/06/2005
• Issued: 11/02/2010
• Est. Priority Date: 06/04/2004
• Status: Active Grant

• Current Assignee: ResMed Pty Ltd. (ResMed Incorporated)
• Original Assignee: Resmed Limited (ResMed Incorporated)
• Inventors: Price, Andrew Martin, Kwok, Philip Rodney, Robinson, Gary Christopher, Richard, Ron, Selvarjan, Karthikeyan, Vuletich, Ivan John, Su, Sophear, Kelly, John Michael
• Primary Examiner(s): O'Connor; Gerald J.
• Assistant Examiner(s): Pauls; John A
• Application Number:
  US10/556,461
• Publication Number:
  US 20060235877A1
• Time in Patent Office: 1,975 Days
• Field of Search: 705/2, 705/4, 705/153, 706/14, 707/104.1, 709/203, 382/154, 128/206.24, 248/279, 250/223, 351/206
• US Class Current: 705/2
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0622 having an underlying cushion
• CPC Class Codes: A61M 16/0633 with forehead support
• CPC Class Codes: A61M 2016/0661 with customised shape
• CPC Class Codes: A61M 2205/0216 Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
• CPC Class Codes: A61M 2205/3553 remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• 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 50/50 for simulation or modelling of medical disorders

Abstract

A mask fitting system (1) for selecting a mask system for a patient includes at least one terminal (6) which receives data unique to a patient. The patient data can be scanned in using a scanner, such as a handheld or 3-D scanner, or the relevant dimensions of the patient can be simply input into the terminal. A database (2) is provided to store mask system data relating to a plurality of potential mask system solutions for the patient. A communication channel (4) is provided by which the data received by the terminal can be compared with mask system data stored in a mask system database, so as to generate a best-fit mask system result. The best-fit result may include one or more mask system recommendations for the patient.

Claims

1. A mask fitting system for selecting a mask system for a patient, the system comprising:

at least one terminal configured to receive patient data specific to the patient, including at least one two-dimensional front image of the patient and at least one two-dimensional profile image, the patient data including a nasal or nares image of the patient;

an input controller in communication with the at least one terminal, the input controller being configured to determine the patient'"'"'s facial dimensions from the at least one two-dimensional front image and the at least one two-dimensional profile image via an automatic facial feature extractor or pointer-based input mechanism, the automatic facial feature extractor or pointer-based input mechanism being usable to identify predefined locations on the patient'"'"'s face in deriving the facial dimensions of the patient;

a mask system database to store mask system data relating to a plurality of mask systems;

a communication channel by which the patient'"'"'s facial dimensions are to be communicated with the mask system database; and

at least one controller configured to compare the patient'"'"'s facial dimensions with the mask system data stored in the mask system database, so as to select at least one best fit mask system from the plurality of mask systems for the patient, in dependence on the comparison.

2. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the patient data includes at least one of physical characteristics, the patient'"'"'s history with mask systems, and the patient'"'"'s sleeping characteristics.

3. A mask fitting system for selecting a mask system for a patient according to claim 2, wherein the physical characteristics include one or more of the following criteria:

age of the patient, facial hair of the patient, whether the patient wears dentures, and the sex of the patient.

4. A mask fitting system for selecting a mask system for a patient according to claim 2, wherein the patient'"'"'s history with mask systems includes information regarding the patient'"'"'s type of breathing, leak problems with prior mask systems, anxiety of the patient when wearing a mask system, and whether the patient prefers to watch TV or read while wearing a mask system.

5. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the facial dimensions include at least one of the depth, length and width of the patient'"'"'s nose.

6. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the at least one terminal includes an automatic facial feature extractor and a user interface with a display.

7. A mask fitting system for selecting a mask system for a patient according to claim 6, wherein the terminal includes a cursor visible on the display, the cursor being configured for movement to one or more positions on the two-dimensional frontal and/or profile images of the patient, to thereby derive facial dimensions of the patient via the image(s).

8. A mask fitting system for selecting a mask system for a patient according to claim 6, wherein the automatic facial feature extractor is a scanner to automatically obtain the facial dimensions from the patient without the use of a pointer-based input mechanism.

9. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the at least one terminal is further configured to receive a separate two-dimensional nasal or nares image of the patient.

10. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the mask system data is associated with a tagging device provided on each of the mask systems.

11. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the system includes fuzzy logic to adapt to a user'"'"'s fit methods.

12. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the at least one two-dimensional front image and/or the at least one two-dimensional profile image are compared to scans of the plurality of mask systems, and a metric of best fit is determined therefrom.

13. A mask fitting system for selecting a mask system for a patient according to claim 1, wherein the patient data specific to the patient includes a scan and/or a trace of the patient'"'"'s nasal area.

14. A three-dimensional mask fitting system for selecting a mask system for a patient, the system comprising:

at least one terminal configured to receive patient data specific to the patient, including a three dimensional facial representation of the patient;

a mask system database to store mask system data relating to a plurality of mask systems;

a communication channel by which patient data received by the at least one terminal is to be communicated with the mask system database;

at least one controller configured to compare the three dimensional facial representation of the patient with the mask system data stored in the mask system database, the at least one controller being configured to compare the patient data with the mask system data stored in the mask system database, so as to select at least one mask system from the plurality of mask systems; and

mask fitting programmed logic circuitry configured to predict leaks and contact pressure between the at least one mask system and the three dimensional facial representation of the patient, taking into account the patient'"'"'s skin texture and firmness, so as to select at least one best-fit mask system from the at least one mask system selected by the at least one controller.

15. A mask fitting system for selecting a mask system for a patient according to claim 14, wherein the terminal includes a non-contact reader to obtain the three dimensional facial representation of the patient.

16. A mask fitting system for selecting a mask system for a patient according to claim 14, wherein the terminal includes a contact reader to obtain the three dimensional facial representation of the patient.

17. A three-dimensional mask fitting system for selecting a mask system for a patient according to claim 14, further comprising a contact cushion contouring device operable to provide the three dimensional representation of the patient.

18. A three-dimensional mask fitting system for selecting a mask system for a patient according to claim 17, wherein the contact cushion contouring device is formed from a deformable material including one or more of gel, silicone, foam, and/or plastic material.

19. A three-dimensional mask fitting system for selecting a mask system for a patient according to claim 17, wherein the contact cushion contouring device comprises a cushion of pins and/or loaded springs.

20. A three-dimensional mask fitting system for selecting a mask system for a patient according to claim 17, wherein the contact cushion contouring device is configured to be placed over the patient'"'"'s face to form a deformation, and further wherein the deformation may be traced, photographed, and/or scanned.

21. A mask fitting system for selecting a mask system for a patient according to claim 20, further comprising a stylus and/or laser operable to generate the scan and/or trace.

22. A mask fitting system for selecting a mask system for a patient according to claim 20, wherein the scan and/or the trace may be used to customize nasal prongs.

23. A method for selecting a mask system for a patient comprising:

receiving into a terminal patient data unique to the patient and at least one two-dimensional front image of the patient and at least one two-dimensional profile image of the patient, the patient data including a nasal or nares image of the patient;

determining patient facial dimensions from the at least one two-dimensional front image and the at least one two-dimensional profile image via an automatic facial feature extractor or pointer-based input mechanism, the automatic facial feature extractor or pointer-based input mechanism being usable to identify predefined locations on the patient'"'"'s face in deriving the facial dimensions of the patient;

communicating the patient'"'"'s facial dimensions to a mask system database;

comparing the patient'"'"'s facial dimensions to mask system data stored in the mask system database to produce a best-fit mask system signal or result; and

communicating the best-fit mask system signal or result to the terminal.

24. A method for operating a terminal for use in determining a best fit mask system for a patient, the method comprising:

receiving patient data and at least one three dimensional facial image of the patient from the terminal;

communicating at least a portion of the patient data and a representation of the three dimensional facial image of the patient to a mask system database, the mask system database including a plurality of mask systems;

comparing the patient data and the at least one three dimensional facial image with mask system data stored in the mask system database;

selecting at least one mask system from the plurality of mask systems;

electronically determining pressure and leaks between the representation of the three dimensional facial image of the patient and each one at least one mask system of the plurality of mask systems by at least taking the texture and firmness of the patient'"'"'s skin into account, so as to determine at least one best-fit mask system; and

displaying the at least one best-fit mask system.

25. A method according to claim 24, further comprising receiving from a contact cushion contouring device the patient data specific to the patient, the contact cushion contouring device being formed from a deformable material including one or more of gel, silicone, foam, and/or plastic material.

26. A method according to claim 24, wherein the contact cushion contouring device comprises a cushion of pins and/or loaded springs.

27. A method according to claim 24, further comprising:

placing a contact cushion contouring device over the patient'"'"'s face; and

,

tracing, photographing, and/or scanning the contact cushion contouring device to generate the patient data specific to the patient.

28. A method according to claim 27, further comprising customizing nasal prongs based at least in part on the scan and/or the trace of the nasal area.

29. A method according to claim 24, further comprising scanning and/or tracing the patient'"'"'s nasal area to generate patient data specific to the patient, the scanning and/or tracing being performed by a stylus and/or a laser.

30. A recording medium on which is recorded a control program for controlling a data processor used in conjunction with a mask fitting system, the recording medium including machine-readable instructions for causing the data processor to:

receive into a terminal patient data unique to a patient, including at least one two-dimensional front image of the patient and at least one two-dimensional profile image of the patient, the patient data including a nasal or nares image of the patient;

determine patient facial dimensions from the at least one two-dimensional front image and the at least one two-dimensional profile image via an automatic facial feature extractor or pointer-based input mechanism, the automatic facial feature extractor or pointer-based input mechanism being usable to identify predefined locations on the patient'"'"'s face in deriving the facial dimensions of the patient;

communicate the patient'"'"'s facial dimensions to a mask system database including mask system data;

compare the patient'"'"'s facial dimensions with the mask system data to provide a best-fit mask system result;

communicate the best-fit mask system result from the mask system database to the terminal; and

display the at least one best-fit mask system.

31. A recording medium according to claim 30, wherein a contact cushion contouring device is operable to generate the patient data, the contact cushion contouring device being formed from a deformable material including one or more of gel, silicone, foam, and/or plastic material.

32. A recording medium on which is recorded a control program for controlling a data processor used in conjunction with a terminal of a mask fitting system, the recording medium including machine readable instructions for causing the data processor to:

read, receive, and/or scan patient data unique to a patient and at least one three dimensional facial image of the patient;

communicate at least a portion of the patient data and a representation of the three dimensional facial image of the patient to a mask system database, the mask system database including a plurality of mask systems;

compare the patient data and the at least one three dimensional facial image with mask system data stored in the mask system database;

select at least one mask system from the plurality of mask systems;

electronically determine pressure and leaks between the representation of the three dimensional facial image of the patient and each one of the at least one mask system of the plurality of mask systems by at least taking the texture and firmness of the patient'"'"'s skin into account, so as to determine at least one best-fit mask system; and

provide at least one best-fit mask system.

33. A recording medium on which is recorded a control program for controlling a data processor used in conjunction with the mask fitting database of a mask fitting system according to claim 32, wherein the mask system data includes individual characteristics on each of the plurality of mask systems, the individual characteristics of each of the plurality of mask systems graded according to a mask system grading criteria.

34. A recording medium according to claim 32, wherein a contact cushion contouring device is operable to generate the patient data is based on a contact cushion contouring device configured to generate input to the control program, the contact cushion contouring device comprising a cushion of pins and/or loaded springs.

35. A recording medium according to claim 32, wherein the patient data specific to the patient can be generated by tracing, photographic, and/or scanning a contact cushion contouring device placed over the patient'"'"'s face.

36. A recording medium according to claim 32, wherein the patient data specific to the patient is based on a scan and/or a trace of the patient'"'"'s nasal area that is provided as input to the control program.

37. A recording medium according to claim 36, wherein a stylus and/or laser is operable to generate the scan and/or trace as input to the control program.

38. A recording medium according to claim 36, wherein the scan and/or the trace may be used to customize nasal prongs.

39. A mask fitting system for selecting a mask system for a patient, the system comprising:

an image acquisition device configured to take at least two images of a patient from different pre-determined angles at a predetermined fixed focal length, the images being taken subsequent to one another; and

at least one terminal configured to receive the at least two images of a patient, the at least one terminal being configured to;

identify patient landmarks via a pointer-based input mechanism or an automatic facial feature extractor that takes into account the pre-determined angles and the predetermined fixed focal length;

compare said identified patient landmarks with dimensional data of a plurality of masks stored in a database and identify at least one mask likely or suitable to fit a patient based on said comparison, and

determine and display a weighted score of likelihood of suitability of fit of each identified mask.

40. A mask fitting system according to claim 39, further comprising a mount assembly including a base for stabilizing the mount, a chin support attached to the base for locating the patient'"'"'s head, an arm attached to chin support for setting the focal length, and a distal end of said arm to support said image acquisition device.

41. A mask fitting system according to claim 40, wherein the distal end of said arm comprises a screw to secure the image acquisition device.

42. A mask fitting system according to claim 40, wherein the arm is located on a pivot to rotate the arm from a first position to at least a second position.

43. A mask fitting system according to claim 42, further comprising a lock in at least a portion of the pivot to stabilize the image acquisition device in at least a first position.

44. A mask fitting system according to claim 43, wherein the lock comprises a tab and a bump.

45. A mask fitting system according to claim 43, wherein the lock stabilizes the image acquisition device at a frontal position of the patient and a profile position of the patient.

46. A mask fitting system according to claim 40, wherein the chin support remains in a fixed position when the image acquisition device is rotated.

47. A mask fitting system according to claim 40, wherein the arm is provided at a length sufficient to enable the image acquisition device to capture all required facial dimensions.

48. A mask fitting system according to claim 40, wherein the mount assembly is disassemblable.

49. A mask fitting system according to claim 39, wherein the patient landmarks include dimensions obtained from front and profile views of a patient.

50. A mask fitting system according to claim 49, wherein the dimensions include at least one of the depth, length, and width of the patient'"'"'s nose.

51. A mask fitting system according to claim 50, wherein the at least one terminal comprises an automatic facial feature extractor and a user interface with a display.

52. A mask fitting system according to claim 51, wherein the automatic facial feature extractor comprises a camera configured to provide an image of the patient to the display, wherein the image comprises at least one of a frontal image of a patient, a profile image of the patient and/or a nasal or nare image of the patient.

53. A mask fitting system according to claim 39, wherein the image acquisition device is configured to provide a 3D model of the patient'"'"'s face, the 3D model being usable by the at least one terminal to electronically determine possible gaps between the patient'"'"'s face and the plurality of mask systems.

54. A mask fitting system according to claim 53, wherein the patient'"'"'s skin texture/firmness is taken into account to determine said possible gaps.

55. A mask fitting system according to claim 39, wherein the image acquisition device includes a camera.

56. A mask fitting system according to claim 39, wherein the image acquisition device includes a 3D scanner.

57. A mask fitting system according to claim 39, wherein the at least one two images include at least one two-dimensional front image of the patient and at least one two-dimensional profile image, including a nasal or nares image of the patient.

58. A mask fitting system according to claim 39, wherein the at least one terminal is further configured to identify said patient landmarks via a scanner or cursor-based input mechanism.

59. A mask fitting system according to claim 39, wherein the at least one terminal is further configured to receive a separate two-dimensional nasal or nares image of the patient.

60. A mask fitting system according to claim 39, wherein the terminal includes a cursor visible on the display, the cursor being configured for movement to one or more positions on the two-dimensional frontal and/or profile images of the patient, to thereby derive facial dimensions of the patient via the image(s).

61. A mask fitting system according to claim 39, wherein the automatic facial feature extractor is a scanner to automatically obtain the facial dimensions from the patient without the use of a cursor.