Wound dressing monitoring systems including appurtenances for wound dressings

• US 10,265,219 B2
• Filed: 04/14/2014
• Issued: 04/23/2019
• Est. Priority Date: 04/12/2012
• Status: Active Grant

• Current Assignee: Elwha LLC (Intellectual Ventures LLC)
• Original Assignee: Elwha LLC (Intellectual Ventures LLC)
• Inventors: Duesterhoft, Paul, Dykstra, Nicholas, Hawkins, Daniel, Hyde, Roderick A., Kare, Jordin T., Leuthardt, Eric C., Schubert, Elizabeth L., Tegreene, Clarence T., Wood, Jr., Lowell L.
• Primary Examiner(s): Abouelela, May A
• Application Number:
  US14/252,136
• Publication Number:
  US 20140298928A1
• Time in Patent Office: 1,835 Days
• Field of Search: 600573, 600583, 604319, 602 42
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61F 13/00051 Accessories for dressings
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3382 Upper level detectors
• CPC Class Codes: A61M 2205/3553 remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2230/50 Temperature
• CPC Class Codes: G01N 33/00 Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

Appurtenances to a wound dressing and systems for monitoring wound dressings are described. In some embodiments, a system for monitoring a wound dressing includes: an appurtenance to a wound dressing, wherein the appurtenance includes a sensor unit, an electronic identifier, and a transmitter unit operably attached to the sensor unit and to the electronic identifier; and a local unit including a receiver for the transmitter unit, a processor operably attached to the receiver, and a communication unit operably attached to the processor.

Claims

1. An appurtenance to a wound dressing, comprising:

a substrate including a bottom wall, the bottom wall including a surface of a size and shape to mate with a surface of the wound dressing, the substrate defining an interior space and including a flexible divider disposed in the interior space, the flexible divider extending upwardly from the bottom wall, the flexible divider separating the substrate into a first lateral section and a second lateral section, the first lateral section and the second lateral section extending upwardly from at least a portion of the bottom wall, the flexible divider configured to minimize fluid flow between the first lateral section and the second lateral section, wherein each of the first lateral section and the second lateral section includes an at least partially enclosed compartment;

a plurality of projections that project from the substrate, the plurality of projections are configured to pierce the wound dressing, at least one of the plurality of projections exhibiting a shape that generally tapers from a proximal end thereof to a distal end thereof, wherein the proximal end is adjacent to the substrate and the distal end is spaced from the substrate;

a sensor unit affixed to the substrate;

an electronic identifier affixed to the substrate; and

a transmitter unit operably attached to the sensor unit and to the electronic identifier, the transmission unit including circuitry configured to transmit information associated with the sensor unit and the transmitter unit.

2. The appurtenance of claim 1, wherein the sensor unit comprise:

a chemical sensor.

3. The appurtenance of claim 1, wherein the sensor unit comprises:

a resonance sensor.

4. The appurtenance of claim 1, wherein the sensor unit comprises:

a plurality of sensors within the sensor unit.

5. The appurtenance of claim 1, wherein the electronic identifier comprises:

an RFID unit.

6. The appurtenance of claim 1, wherein the electronic identifier comprises:

an electronic code.

7. The appurtenance of claim 1, comprising:

at least two sensor units, the sensor units positioned on opposing ends of the substrate.

8. The appurtenance of claim 7, wherein the flexible divider is positioned between at least two of the sensor units.

9. The appurtenance of claim 1, further comprising:

a desiccant material in fluid communication with the wound dressing.

10. The appurtenance of claim 1, further comprising:

a channel internal to at least one of the plurality of projections, the channel attached to a first aperture at a distal end of the projection, the channel attached to a second aperture positioned adjacent to the substrate; and

an enclosed tubular structure attached to the substrate, the enclosed tubular structure affixed to the second aperture at a first end, the tubular structure affixed to the sensor unit at a second end.

11. The appurtenance of claim 10, further comprising:

one or more walls forming a gas-sealed chamber attached to the enclosed tubular structure, the gas-sealed chamber including an internal gas pressure below atmospheric pressure; and

a breakable seal between the gas-sealed chamber and the enclosed tubular structure.

12. The appurtenance of claim 1, wherein the plurality of projections are configured to reversibly mate with the surface of the wound dressing.

13. The appurtenance of claim 1, wherein:

the plurality of projections includes at least one first projection that fluidly couples the first lateral section to the wound dressing and at least one second projection that fluidly couples the second lateral section to the wound dressing; and

the sensor unit includes a first sensor unit disposed in the first lateral section and a second sensor unit disposed in the second lateral section.

14. The appurtenance of claim 1, wherein the flexible divider includes a thin plastic sheet.

15. The appurtenance of claim 1, further comprising a first section of a desiccant or sorbent material disposed in the first section and a second section of the desiccant or sorbent material disposed in the second section.

16. The appurtenance of claim 1, wherein the sensor unit is deposed in a portion of at least one of the plurality of projections that is configured to pierce the wound dressing, wherein the sensor unit is configured to detect one or more characteristics of the wound dressing or an individual using the wound dressing.

17. The appurtenance of claim 1, wherein:

the substrate includes a first edge and a second edge, the surface extending between the first edge and the second edge; and

the plurality of projections includes at least one first projection attached to the first edge and at least one second projection attached to the second edge.

18. The appurtenance of claim 1, wherein at least two of the plurality of projects extend outward in substantially same place as the surface of the substrate.

19. A wound dressing monitoring system, comprising:

an appurtenance to a wound dressing, wherein the appurtenance includes

a substrate including a bottom wall, the bottom wall including a surface configured to mate with a surface of the wound dressing, the substrate defining an interior space and including a flexible divider disposed in the interior space, the flexible divider extending upwardly from the bottom wall, the flexible divider separating the interior space of the substrate into a first lateral section and a second lateral section, the first lateral section and the second lateral section extending upwardly from at least a portion of the bottom wall, the flexible divider configured to minimize fluid flow between the first lateral section and the second lateral section, wherein each of the first lateral section and the second lateral section includes an at least partially enclosed compartment;

a plurality of projections that project from the substrate, the plurality of projections are configured to pierce the wound dressing, at least one of the plurality of projections exhibiting a shape that generally tapers from a proximal end thereof to a distal end thereof, wherein the proximal end is adjacent to the substrate and the distal end is spaced from the substrate;

a sensor unit;

an electronic identifier; and

a transmitter unit operably attached to the sensor unit and to the electronic identifier; and

a local unit including a receiver for the transmitter unit, a processor operably attached to the receiver, and a communication unit operably attached to the processor.

20. The system of claim 19, wherein the transmitter unit included in the appurtenance comprises:

a radio-frequency identification (RFID) transmitter.

21. The system of claim 19, wherein the transmitter unit included in the appurtenance comprises:

a near field communication (NFC) device.

22. The system of claim 19, wherein the processor comprises:

first circuitry configured to accept data received by the receiver from the transmitter unit of the appurtenance;

second circuitry configured to classify a subset of the received data as originating from the electronic identifier of the appurtenance;

third circuitry configured to classify a subset of the received data as originating from the sensor unit of the appurtenance;

fourth circuitry configured to compare the subset of the received data classified as originating from the sensor unit of the appurtenance with data in memory; and

fifth circuitry configured to initiate a signal to a system user in response to the comparison;

wherein the first circuitry, the second circuitry, the third circuitry, the fourth circuitry, and the fifth circuitry form at least one circuitry.

23. The system of claim 19, wherein the processor comprises:

first circuitry configured to accept data received by the receiver from the transmitter unit of the appurtenance; and

second circuitry configured to initiate a signal by the communication unit in response to the received data;

wherein the first circuitry and the second circuitry form at least one circuitry.

24. The system of claim 23, wherein the processor comprises:

third circuitry configured to initiate a signal to a user in response to the received data;

wherein the first circuitry, second circuitry, and the third circuitry form at least one circuitry.

25. The system of claim 19, wherein the processor comprises:

first circuitry configured to accept data received by the receiver from the transmitter unit of the appurtenance;

second circuitry configured to classify two or more subsets of the received data;

third circuitry configured to compare the two or more subsets of the received data with data in memory;

fourth circuitry configured to prioritize results from the comparisons; and

fifth circuitry configured to initiate a signal to a user in response to the prioritized results;

wherein the first circuitry, the second circuitry, the third circuitry, the fourth circuitry, and the fifth circuitry form at least one circuitry.

26. The system of claim 25, wherein the processor comprises:

sixth circuitry configured to add a time stamp to the accepted data received by the receiver from the transmitter unit of the appurtenance;

seventh circuitry configured to compare the time stamp with data in memory to generate an elapsed time value;

eighth circuitry configured to prioritize results from the comparisons and the elapsed time value; and

ninth circuitry configured to initiate a signal to a user in response to the prioritized results;

wherein the first circuitry, the second circuitry, the third circuitry, the fourth circuitry, the fifth circuitry, the sixth circuitry, the seventh circuitry, the eighth circuitry, and the ninth circuitry form at least one circuitry.

27. The system of claim 19, wherein the processor comprises:

first circuitry configured to accept data received by the receiver from the transmitter unit of the appurtenance;

second circuitry configured to classify two or more subsets of the received data;

third circuitry configured to compare the two or more subsets of the received data with data in memory;

fourth circuitry configured to prioritize results from the comparisons into a binary output; and

fifth circuitry configured to initiate a signal to a user based on the binary output;

wherein the first circuitry, the second circuitry, the third circuitry, the fourth circuitry, and the fifth circuitry form at least one circuitry.

28. The system of claim 19, comprising:

a central assembly, including a central assembly processor, a central assembly receiver configured to receive signals from the communication unit, and a user interface.