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Claims for Patent: 5,843,014

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Claims for Patent: 5,843,014

Title: Display for an electrotransport delivery device
Abstract:An electrotransport delivery device (10) with a display (14) having only on and off states, and a method of operating the display (14), are provided. Preferably, the display 14 is a light (e.g., a light emitting diode) with lit and unlit states or an audible alarm (e.g., a beeper) with sounding and silent states. The device (10) counts and stores the number of events (e.g., patient initiated drug delivery or sensed patient condition) which occur over a predetermined period of time (e.g., the period of time over which the device is worn by the patient). The event count is displayed by cycling the display (14) between on and off states according to a predetermined regimen which correlates the number of on/off cycles to the number of events. The device and method permit the use of a simple and inexpensive means (e.g., an LED) to display (e.g., to a medical technician) the number of e.g., patient initiated doses delivered over a previous period of therapy.
Inventor(s): Lattin; Gary A. (Forest Lake, MN), Bernstein; Keith J. (Somerville, NJ)
Assignee: ALZA Corporation (Palo Alto, CA)
Application Number:08/410,112
Patent Claims: 1. A method of displaying how many events have occurred over a period of use of a patient-worn electrotransport delivery device by means of a delivery device display having on and off states, comprising:

counting the number of events which occur over the period of use and storing the count; and

displaying the count by cycling the display between on and off states according to a predetermined regimen which correlates the number of on/off cycles to the count.

2. The method of claim 1, wherein the predetermined regimen correlates each on/off cycle of the display to between x and y events, x and y each being an integer from 0 to 100.

3. The method of claim 2, wherein zero on/off cycles of the display correlates to no events having occurred.

4. The method of claim 1, wherein the display is selected from the group consisting of a light having lit and unlit states, an audible alarm having sounding and no-sounding states, and a combination thereof.

5. The method of claim 4, wherein the light comprises a light emitting diode.

6. The method of claim 4, wherein the audible alarm comprises a beeper.

7. The method of claim 1, wherein the event comprises delivering drug by electrotransport during a delivery interval.

8. The method of claim 7, wherein the delivery interval is shorter than the period of use.

9. The method of claim 8, wherein the period of use is up to about 24 hours.

10. The method of claim 1, wherein the event comprises a patient condition which is sensed by the device.

11. The method of claim 10, including sensing and counting the number of times the patient condition falls outside a predetermined range.

12. The method of claim 1, wherein the event is manually initiated.

13. The method of claim 12, wherein at least some of the events are initiated by the patient activating a switch on the device.

14. The method of claim 1, wherein the display also displays when an event is occurring.

15. The method of claim 1, characterized by displaying the count between successive events.

16. The method of claim 1, characterized by manually initiating the display.

17. A patient-worn electrotransport delivery device, comprising:

a counter for counting the number of events which have occurred over a period of use and storing the count; and

a display having on and off states, the display being operative to cycle between on and off states according to a predetermined regimen which correlates the number of on/off cycles to the count.

18. The device of claim 17, wherein the predetermined regimen correlates each on/off cycle of the display to between x and y events, x and y each being an integer from 0 to 100.

19. The device of claim 17 wherein zero on/off cycles of the display correlates to no events having occurred.

20. The device of claim 17, wherein the display is selected from the group consisting of a light having lit and unlit states, an audible alarm having sounding and no-sounding states, and a combination thereof.

21. The device of claim 20, wherein the light comprises a light emitting diode.

22. The device of claim 20, wherein the audible alarm comprises a beeper.

23. The device of claim 17, wherein the event comprises delivering drug by electrotransport during a drug delivery interval.

24. The device of claim 23, wherein the drug delivery is shorter than the period of use.

25. The device of claim 23, wherein the period of use is up to about 24 hours.

26. The device of claim 23, wherein the drug is an analgesic.

27. The device of claim 17, including a sensor for sensing a patient condition.

28. The device of claim 17, wherein each event comprises the sensed patient condition falling outside a predetermined range.

29. The device of claim 17, including a manually activated switch for initiating an event.
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