Drug dispensing event detector

• US 4,939,705 A
• Filed: 11/23/1988
• Issued: 07/03/1990
• Est. Priority Date: 11/23/1988
• Status: Expired due to Term

• Current Assignee: Aprex Corporation
• Original Assignee: Aprex Corporation
• Inventors: Hamilton, Richard G., Liu, David M.
• Primary Examiner(s): Miska, Vit W.
• Application Number:
  US07/275,294
• Time in Patent Office: 587 Days
• Field of Search: 368/10, 368/107-113, 221/2, 221/3, 221/15, 340/309.15, 340/309.4, 364/569
• US Class Current: 368/10
• CPC Class Codes: A61J 2200/30 Compliance analysis for taking medication
• CPC Class Codes: A61J 7/0418 with electronic history memory
• CPC Class Codes: A61J 7/0436 resulting from removing a drug from, or opening, a container

Abstract

A device for detecting the dispensing of drugs from a container in a way which eliminates false detection events due to mishandling of the container is disclosed. The device includes a container which may be opened and closed. It also contains a means for detecting the opening and separately detecting the closing of the container as well as means for measuring the time between these events and comparing this elapsed time to a predetermined standard indicative of drug dispensing event. The times of proper drug dispensing events are stored in the device for use by the health care professional following the patient'"'"'s drug dosing compliance. Other opening and closing intervals which fall outside this time range give rise to an alternative response. They may be recorded with a notation of their probable error or they may be disregarded. In other aspects, the invention provides a preferred physical configuration for the electronic components of the device and a preferred means for accessing the data stored in the device.

Claims

1. A device for detecting the dispensing of drug from a container comprising

a container having an openable and reclosable dispensing aperture,

means capable of generating a first electrical signal in response to the opening of the openable aperture and a second electrical signal in response to the reclosing of the aperture,

means for measuring the elapsed time between the first electrical signal and the second electrical signal,

means for comparing the elapsed time with a predetermined accept/reject time range and determining if the elapsed time falls within the accept range, and

means for recording each time an elapsed time within the accept range is determined.

2. The device of claim 1 wherein the predetermined accept/reject time range is a time range having a minimum boundary of about 0.5 seconds.

3. The device of claim 2 wherein the recording is noted as a valid dispensing of drug from the container.

4. The device of claim 1 additionally comprising means for measuring a second elapsed time between the second electrical signal and the next subsequent first electrical signal

means for comparing the second elapsed time with a second predetermined accept/reject time range and determining if the elapsed time falls within that second accept range, and

means for recording each time an elapsed time within the second accept range is determined.

5. The device of claim 4 wherein the second predetermined accept/reject time range is a time range having a minimum boundary of about 2 seconds.

6. The device of claim 5 wherein the recording is noted as a valid closing of the container.

7. The device of claim 4 additionally comprising means for recording openings or closings of the container which fall outside the accept range.

8. The device of claim 4 additionally comprising means for alerting the patient when the elapsed time is larger than the accept range.

9. The device of claim 4 additionally comprising means for informing the patient'"'"'s health care professional when an elapsed time outside the accept ranges has been detected.