Integral, flexible, electronic patient sensing and monitoring system

• US 6,917,293 B2
• Filed: 05/17/2002
• Issued: 07/12/2005
• Est. Priority Date: 05/17/2002
• Status: Expired due to Term

• Current Assignee: J Brasch Company LLC
• Original Assignee: Tactilitics, Inc.
• Inventors: Beggs, George R.
• Primary Examiner(s): Mullen, Thomas
• Application Number:
  US10/147,683
• Publication Number:
  US 20030216670A1
• Time in Patent Office: 1,152 Days
• Field of Search: 340/573.1, 340/573.4, 340/666, 340/667, 600/595
• US Class Current: 340/573.1
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 2562/164 the sensor is mounted in or on a conformable substrate or carrier
• CPC Class Codes: A61B 5/1113 Local tracking of patients, e.g. in a hospital or private home
• CPC Class Codes: A61B 5/1115 Monitoring leaving of a patient support, e.g. a bed or a wheelchair
• CPC Class Codes: A61B 5/1118 Determining activity level
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61B 5/6894 Wheel chairs
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

Abstract

A self contained patient sensing and monitoring system is provided for sensing and monitoring the presence, absence, and movement of the patient. Embodiments of the present invention provide a system conformable to a patient support surface, systems that are self contained, systems that are operationally unobtrusive, and programmable systems. Embodiments of the present invention comprise a container, a sensor configured within the container, and a control unit responsive to the sensor and configured within the container, wherein the container at least substantially encompassing the sensor and the control unit and wherein the control unit is conformable to the patient support surface. Some embodiments of the present invention comprise a container, a sensor configured within the container, and a control unit conformable to a patient support surface and configured within the container, wherein said control unit is responsive to the sensor. Embodiments of the present invention may also comprise a sensor, a signal conditioner responsive to the sensor, a processor configured to comprise instruction and data and to which the signal conditioner is configured to provide signals generated by the sensor, at least one storage media, wherein the instructions and data are stored on the at least one storage media, and at least one input connection capable of providing programmable input to the storage media and the processor. Methods are also disclosed for sensing and monitoring the presence, absence, and movement of a patient. The inventive concept can be used in various applications, such as a bed, mattress, chair, or wheelchair, to achieve the monitoring of the presence, absence, and movement of a patient.

Claims

1. A patient sensing and monitoring system, comprising:

a sensor for detecting the presence or absence of a patient;

a control unit responsive to the sensor and operable to send a signal to a receiving device upon detecting the absence of the patient; and

a container at least substantially encompassing the sensor and the control unit, wherein the container, sensor, and control unit configuration is conformable to a surface of a patient support apparatus, and wherein the control unit comprises one or more operation modes selected from the group consisting of a hold mode, and a sleep mode.

2. The system as described in claim 1 wherein said container comprises a sleeve.

3. The system as described in claim 1 wherein said system comprises a wheelchair covering.

4. The system as described in claim 1 wherein said system comprises a wheelchair pad.

5. The system as described in claim 1 wherein said system comprises a mattress covering.

6. The system as described in claim 1 wherein said system comprises a mattress pad.

7. The system as described in claim 1 wherein said system is configured as a component of a mattress.

8. The system as described in claim 1 wherein said system comprises a chair covering.

9. The system as described in claim 1 wherein said system comprises a chair pad.

10. The system as described in claim 1, wherein the one or more operation modes is controlled by a switch.

11. The system as described in claim 1 wherein said control unit is programmable.

12. The system as described in claim 11 wherein said control unit comprises a processor.

13. The system as described in claim 12 wherein said control unit is configured to process instructions and data.

14. The system as described in claim 13 wherein said control unit comprises at least one storage medium and wherein said instructions and data are stored on said at least one storage medium.

15. The system as described in claim 12 wherein said control unit comprises a piezoelectric element responsive to said processor and capable of providing an audible alarm.

16. The system as described in claim 1 wherein said control unit comprises a battery.

17. The system as described in claim 1 wherein said patient sensing and monitoring system is configured for external power supply.

18. The system as described in claim 1 wherein said control unit and said sensor are configured on a conformable substrate.

19. The system as described in claim 18 further comprising at least one flex element.

20. The system as described in claim 19 wherein said at least one flex element comprises at least one opening in said conformable substrate.

21. The system as described in claim 1 further comprising a wireless transmitter responsive to said control unit.

22. The system as described in claim 21 wherein said wireless transmitter is configured within said container and wherein said container at least substantially encompasses said wireless transmitter.

23. The system as described in claim 21 wherein said wireless transmitter comprises a radio frequency transmitter.

24. The system as described in claim 23 wherein said radio frequency transmitter is capable of transmission at about a frequency range of 900 MHz.

25. The system as described in claim 21 further comprising at least one wireless receiver responsive to said wireless transmitter.

26. The system as described in claim 25 wherein said wireless receiver is connected to patient monitoring equipment.

27. The system as described in claim 26 wherein said patient monitoring equipment comprises a nurse call circuit.

28. The system as described in claim 1 further comprising at least one output conductor connected to said control unit.

29. The system as described in claim 28 wherein said at least one output conductor comprises an electrical conductor selected from the group consisting of a cable, wire, lead, or plug conductor.

30. A patient sensing and monitoring system, comprising:

a sensor for detecting the presence or absence of a patient, the sensor comprising an on-off switch circuit comprising a plurality of electrical connections;

a control unit responsive to the sensor and operable to send a signal to a receiving device upon detecting the absence of the patient; and

a container at least substantially encompassing the sensor and the control unit, wherein the container, sensor, and control unit configuration is conformable to a surface of a patient support apparatus.

31. The system as described in claim 30 wherein said on-off switch circuit comprises a first portion and a second portion, wherein said first and second portions are configured to responsively provide either an open switch configuration or a closed switch configuration responsive to the weight of a patient upon said sensor.

32. The system as described in claim 31 further comprising at least one support element adjacent said first and said second portions.

33. The system as described in claim 32 wherein said at least one support element comprises a spacer.

34. The system as described in claim 31 wherein said first portion comprises a first set of electrical connections and said second portion comprises a second set of electrical connections, and wherein said closed switch configuration comprises an electrical connection between at least one of said electrical connections of said first set and at least one of said electrical connections of said second set.

35. The system as described in claim 31 wherein said first portion comprises a top portion of said on-off switch circuit and said second portion comprises a bottom portion of said on-off switch circuit, and wherein either the top portion or the bottom portion is substantially adjacent a patient.

36. The system as described in claim 30 wherein said plurality of electrical connections comprise a network of electrical connections.

37. The system as described in claim 36 wherein said network of electrical connections comprises at least a portion of a series of substantially parallel network of electrical connections.

38. The system as described in claim 30 wherein said on-off switch circuit is conformable to the surface of the patient support apparatus.

39. The system as described in claim 38 wherein said on-off switch circuit is configured on a conformable substrate.

40. The system as described in claim 39 wherein said on-off switch circuit comprises a formed configuration on said conformable substrate, said formed configuration selected from the group consisting of an inked, etched, or deposited configuration.

41. The system as described in claim 39 further comprising at least one flex element.

42. The system as described in claim 41 wherein said at least one flex element comprises at least one opening in said conformable substrate.

43. A patient sensing and monitoring system, comprising:

a sensor for detecting the presence or absence of a patient;

a control unit responsive to the sensor and operable to send a signal to a receiving device upon detecting the absence of the patient, the control unit comprising a signal conditioner configured to filter static or transient signals generated by the sensor; and

a container at least substantially encompassing the sensor and the control unit, wherein the container, sensor, and control unit configuration is conformable to a surface of a patient support apparatus.

44. The system as described in claim 43 wherein said control unit comprises a processor and wherein said signal conditioner is configured to forward the filtered sensor signals to said processor.

45. The system as described in claim 44 wherein said signal conditioner is configured to provide said filtered sensor signals to said processor upon an open circuit configuration or closed circuit configuration.

46. The system as described in claim 45 wherein said open circuit configuration comprises an open switch configuration of said sensor and said closed circuit configuration comprises a closed switch configuration of said sensor.

47. A patient sensing and monitoring system, comprising:

a sensor for detecting the presence or absence of a patient;

a control unit responsive to the sensor and operable to send a signal to a receiving device upon detecting the absence of the patient, said control unit comprising a processor and at least one input connection, said at least one input connection providing programmable input to at least one storage medium and the processor as instructions; and

a container at least substantially encompassing the sensor and the control unit, wherein the container, sensor, and control unit configuration is conformable to a surface of a patient support apparatus.

48. The system as described in claim 47 wherein said at least one input connection comprises a plurality of programming connections.

49. A patient sensing and monitoring system, comprising:

a sensor for detecting the presence or absence of a patient;

a control unit responsive to the sensor and operable to send a signal to a receiving device upon detecting the absence of the patient, said control unit and said sensor being provided as a formed configuration on a conformable substrate, wherein said formed configuration is selected from the group consisting of an inked, etched, or deposited configuration; and

a container at least substantially encompassing the sensor and the control unit, wherein the container, sensor, and control unit configuration is conformable to a surface of a patient support apparatus.

50. A method of operationally unobtrusively sensing and monitoring a patient, comprising the steps of:

providing a sensor at least substantially encompassed by a container;

providing a control unit responsive to said sensor and at least substantially encompassed by said container;

conformably positioning said encompassed sensor and control unit on a patient support surface of a support apparatus;

monitoring for the presence, absence, or movement of a patient;

detecting an open circuit configuration of said sensor and control unit corresponding to the absence of the patient;

measuring an amount of time corresponding to said open circuit configuration and said absence of said patient;

determining if said amount of time exceeds a threshold delay period;

transmitting an alarm signal corresponding to the absence of the patient upon said step of determining if said amount of time exceeds a threshold delay period;

detecting a closed circuit configuration of the sensor and control unit corresponding to the presence of the patient; and

transmitting patient movement information responsive to said step of detecting a closed circuit configuration.

51. A method of sensing and monitoring a patient as described in claim 50 wherein said step of conformably positioning comprises conformably positioning said encompassed sensor and control unit on a patient support surface of a support apparatus selected from the group consisting of a bed, a mattress, a chair, or a wheelchair.

52. A method of sensing and monitoring a patient as described in claim 50 further comprising the steps of:

powering said control unit and said sensor; and

connecting said control unit to external patient monitor equipment.

53. A method of sensing and monitoring a patient as described in claim 52 wherein said step of connecting said control unit to external patient monitoring equipment comprises connecting said control unit to a nurse call circuit.

54. A method of sensing and monitoring a patient as described in claim 52 wherein said step of connecting said control unit comprises providing wireless connection.

55. A method of sensing and monitoring a patient as described in claim 54 wherein said step of providing wireless connection comprises providing a wireless transmitter connected to said control unit, wherein said wireless transmitter is capable of transmitting signals to at least one receiver external of said wireless transmitter, said control unit, and said sensor.

56. A method of sensing and monitoring a patient as described in claim 52 wherein said step of powering said control unit and sensor comprises activating an on function of said control unit.

57. A method of sensing and monitoring a patient as described in claim 56 wherein said step of powering said control unit and sensor comprises providing an external power supply.

58. A method of sensing and monitoring a patient as described in claim 56 wherein said step of powering said control unit and sensor comprises providing power from a battery connected to said control unit and sensor.

59. A method of sensing and monitoring a patient as described in claim 50 wherein said control unit is programmable, and further comprising the step of:

programming said control unit with instructions and data.

60. A method of sensing and monitoring a patient as described in claim 59 wherein said step of programming comprises programming instructions and data selected from the group consisting of timer data, clock data, hold instructions, or sleep instructions.

61. A method of sensing and monitoring a patient as described in claim 59 wherein said step of programming comprises storing said instructions and data on storage media.

62. A method of sensing and monitoring a patient as described in claim 59 wherein said step of programming comprises entering said instructions and data through at least one input connection.

63. A method of sensing and monitoring a patient as described in claim 59 wherein said step of programming comprises providing instructions and data to said control unit, said instructions selected from instructions of the group consisting of software, program code, or firmware.

64. A method of sensing and monitoring a patient as described in claim 50 wherein said step of monitoring comprises activating a monitoring mode of said control unit and said sensor.

65. A method of sensing and monitoring a patient as described in claim 64 wherein said of activating comprises generating a signal through closed circuit configuration of said control unit and said sensor.

66. A method of sensing and monitoring a patient as described in claim 65 wherein said step of generating a signal comprises creating a closed switch configuration of said sensor.

67. A method of sensing and monitoring a patient as described in claim 66 wherein said step of creating a closed switch configuration of said sensor comprises positioning the patient on said sensor.

68. A method of sensing and monitoring a patient as described in claim 50 wherein said step of detecting an open circuit configuration of said sensor and control unit corresponding to the absence of the patient comprises detecting an open switch configuration of said sensor.

69. A method of sensing and monitoring a patient as described in claim 68 wherein said step of detecting an open switch configuration comprises detecting the removal of patient pressure from said sensor.

70. A method of sensing and monitoring a patient as described in claim 50 wherein said step of detecting an open circuit configuration of said sensor and control unit corresponding to the absence of the patient comprises detecting a time intervals.

71. A method of sensing and monitoring a patient as described in claim 50 further comprising the step of transmitting an alarm signal responsive to said step of detecting an open circuit configuration of said sensor and control unit corresponding to the absence of the patient.

72. A method of sensing and monitoring a patient as described in claim 71 further comprising the steps of:

initiating a hold or sleep mode of said control unit and sensor;

positioning a patient on said sensor;

rescuing the control unit and sensor; and

monitoring for the presence, absence, or movement of the patient on the patient support surface of the support apparatus.

73. A method of sensing and monitoring a patient as described in claim 72 wherein said step of initiating a hold or sleep mode comprises activating a signaling device of said control unit.

74. A method sensing and monitoring a patient as described in claim 73 wherein said step of activating a signaling device of said control unit comprises operating a switch.

75. A method of sensing and monitoring a patient as described in claim 50 further comprising the step of monitoring the energy level of a battery of said control unit.

76. A method of sensing and monitoring a patient as described in claim 75 further comprising the step of transmitting an alarm signal responsive to a low energy level of said battery to monitoring equipment external to said control unit and said sensor.

77. A method of sensing and monitoring a patient as described in claim 76 further comprising the step of generating an audible alarm signal responsive to said low energy level.

78. A method of sensing and monitoring a patient as described in claim 50 wherein said step of detecting a closed circuit configuration of said sensor and control unit corresponding to the presence of the patient comprises detecting a closed switch configuration of said sensor.

79. A method of sensing and monitoring a patient as described in claim 78 wherein said step of detecting a closed switch configuration of said sensor comprises detecting a closed switch configuration of said sensor corresponding to movement of the patient.

80. A method of sensing and monitoring a patient as described in claim 78 wherein said step of detecting a closed switch configuration comprises detecting the weight of a patient on said sensor corresponding to movement or non-movement of the patient.

81. A method of sensing and monitoring a patient as described in claim 80 wherein said step of detecting the weight of a patient comprises detecting a change in the weight of the patient on said sensor.

82. A method of sensing and monitoring a patient as described in claim 50 wherein said step of transmitting patient movement information comprises transmitting patient movement information to external patient monitoring equipment.

83. A method of sensing and monitoring a patient as described in claim 82 further comprising a step of transmitting an alarm signal to external patient monitoring equipment responsive to said patient movement information.

84. A method of sensing and monitoring a patient as described in claim 83 wherein said step of transmitting an alarm signal comprises transmitting a periodic alarm signal.

85. A method of sensing and monitoring a patient as described in claim 83 further comprising the step of transmitting an audible alarm responsive to said patient movement information.

86. A method of sensing and monitoring a patient as described in claim 50 further comprising the step of powering down the control unit and sensor.