1. Field of the Invention
The invention in general relates to disposable dry test strips for testing bodily fluids, and more particularly to a method and apparatus for packaging such test strips.
2. Statement of the Problem
Dry test strips are well known in the art. For example, dry test strips to determine glucose levels in the blood may be used several times a day by diabetics. Lipid and lipid-related dry test strips are used to determine the concentration of a particular blood lipid or lipid related analyte, such as total cholesterol, high density lipoprotein cholesterol (HDL), low density lipoprotein cholesterol (LDL), triglycerides, and ketones. See, for example, U.S. Pat. No. 5,597,532 issued Jan. 28, 1997 to James Connolly, U.S. Pat. No. 5,366,609 issued to Bradley E. White et al. on Nov. 22, 1994, U.S. Pat. No. 5,246,858 issued to Steven R. Arbuckle et al. on Sep. 21, 1993, U.S. Pat. No. 5,104,619 issued to Aurora F. de Castro et al. on Apr. 14, 1992, and U.S. Pat. No. 5,053,199 issued to Dale A Keiser et al. on Oct. 1, 1991. It is noted that ketones are not lipids, but are related to lipids in that they are a by-product of the burning of lipids by the body. One form of state-of-the-art dry test strips, such as lipid and lipid related dry test strips, generally include a dispersion layer to which the blood is applied, one or more red blood cell layers beneath the dispersion layer for separating the red blood cells from the blood plasma, a reagent layer beneath the red blood cell layer in which the reagents that isolate the particular blood analyte are dissolved by the plasma, and a bottom detection layer that produces the signal indicative of the concentration of the analyte. This signal may be, for example, a color, the density of which is proportional to the concentration of the analyte. The concentration signal is read by a test strip reader to produce an output indicating the concentration of the analyte. For example, the reader may be a reflectance meter which reads the color generated in the detection layer. Other dry test strips provide an output via a resistance measurement or other electrochemical measurement. In state-of-the-art dry test systems, a ROM chip is included with each container of dry test strips, and the strip reader includes a port into which the ROM may be inserted. See the patents cited above. The ROM contains calibration data relating to the particular batch of strips, which data is read by the reader to calibrate the output. Dry test strip systems have evolved in the last ten years to become nearly as accurate as laboratory tests run by skilled laboratory technicians.
Dry test strips have the advantage that relatively unskilled people at the site where the test is ordered or needed can perform them in a few minutes. Yet, most of the use of lipid and lipid-related dry test strips is presently limited to physician's office and hospitals. This is due to several reasons, one being the fact that use strategies for lipid and lipid-related dry test strips is somewhat more complicated then, for example, glucose test strips. For example, HDL cholesterol, LDL cholesterol, and triglyceride levels are used by physicians as a significant indicator of risk of coronary heart disease. No one of these by itself is sufficient to tell the physician what the physician needs to know for diagnosis. Ketones may be an indicator of the onset of diabetes, but can also be a normal result of dieting, hard physical exercise, and other common practices. Thus, one test is often not sufficient for a reliable diagnosis. Another reason is that, as compared to, for example, glucose, lipid and lipid-related levels in the blood change relatively slowly. Thus, physicians tend to schedule these tests to be taken at their office, where they have more control over timing and other factors. Moreover, since distributing and selling strips one or two at a time would add significantly to the distribution and sales costs, thereby significantly adding to the cost of the product, manufacturers package the test strips, like other common health or medical goods, in containers of a dozen or more which are conventionally sold to physicians.
For the above reasons, it would be desirable if a way could be found to take advantage of the accuracy of state-of-the-art dry test strips and the fact that they are easily used by unskilled end users, while still taking account of the more complicated aspects of the diagnoses based on them. If at the same time this could be done without significant increase in cost, this would be even more desirable.
The present invention overcomes the above and other problems by packaging multiple types of dry test strips in a single-user package. The present invention also overcomes the above and other problems by packaging the strips in combinations found to be useful for diagnostic purposes. For example, a package may contain two multiple-analyte test strips that test for the concentration of LDL, HDL, and triglycerides simultaneously, four HDL cholesterol test strips, and four LDL cholesterol test strips. Or the package may contain glucose, HDL and triglycerides test strips. Preferably, the particular combinations are as prescribed by a physician for a particular patient, or as desired by a particular end user.
Packaging the test strips with multiple types of strips in a container reduces the cost per strip of distributing and selling. In addition, since generally an individual end user does not have use for more than a few such tests over a several month or longer period, in many contexts, a multiple strip package as described in the Background of the Invention above may be a six month's or more supply for a single patient or end user. Thus, the conventional packaging is wasteful for a typical end user. More importantly, the conventional packaging system and method creates a potential problem that, over such a long period, the end user may forget to use the test strips in a timely manner so as to make diagnosis less reliable. The invention overcomes and addresses this problem by packaging the strips in a manner that automatically reminds the patient or other end user of the appropriate test schedule. Preferably, this is a schedule following the direction or prescription of a physician. For example, each test is packaged in a separate sub-package from the other included tests, and strip-specific scheduling information is applied to the individual sub-package. Preferably, the packaging is structured so that only one dry test strip at a time may be removed from the multiple-strip container.
The invention also anticipates and addresses the potential problem of a user not being able to timely follow a relatively complex use schedule by using the strip reader to remind the user of the test schedule. This problem is also addressed by the strip reader checking an inserted dry test strip against the scheduled tests, and informing the user of whether the test strip has been inserted according to the schedule. The schedule information preferably is communicated to the reader via a ROM chip packaged with the test strips, via the Internet or other wired or wireless communications system, packaged with the test strips via bar-coded test strips, or via tagging a strip with an RFID (radio frequency identification device). For example, the reader may be connected to a computer with a USB connector and the schedule downloaded via the Internet. This downloading may be automatically performed via communication data packaged with the test strip, such as on a ROM, a bar code, or an RFID device.
The invention provides a system for measuring blood analytes, the system comprising: a plurality of dry strips, the test strips including a test strip of a first test strip type for measuring a first analyte type and a second test strip of a second test strip type for measuring a second analyte type different from the first analyte type, the types of test strips selected from the group consisting of: test strips for measuring the concentration of high density lipoprotein (HDL) cholesterol, test strips for measuring the concentration of low density lipoprotein (LDL) cholesterol, test strips for measuring the concentration of lipoprotein cholesterol other than HDL and LDL, test strips for measuring total blood cholesterol, test strips for measuring a triglyceride, test strips for measuring glucose, and test strips for measuring a ketone; and a single-user container of a size that can be held in one hand by a human being, the single-user container containing the first and second test strips. Preferably, the single-user container is selected from the group consisting of a bottle, a jar, a vial, a tray, or a blister pack. Preferably, the system further comprises strip-specific scheduling information for using the plurality of different types of dry test strips, the strip-specific scheduling information either in or on the container. Preferably, the system further comprises schedule confirmation information which permits a user to confirm after a strip is removed from the container what strips have been used and the time each strip was scheduled to be used. Preferably, the strip-specific scheduling information is applied to the container. Preferably, the strip-specific scheduling information is in the container. Preferably, the system further includes an optically or electronically readable data storage element, wherein the strip-specific scheduling information is stored in the data storage element. Preferably, the data storage device is selected from the group consisting of an electronic read-only memory (ROM), a bar code, and a radio frequency identification device (RFID). Preferably, the plurality of dry test strips consists of twenty-five or less of the dry test strips in the single-user container. Preferably, one of the plurality of dry test strips consists of a three analyte test strip. Preferably, the plurality of dry test strips comprises a test strip for measuring glucose and a test strip for measuring a ketone. Preferably, the plurality of dry test strips comprises a test strip for measuring HDL cholesterol, a test strip for measuring glucose, and a test strip for measuring a triglyceride. Preferably, the plurality of dry test strips comprises an HDL cholesterol test strip, an LDL cholesterol test strip, and a total cholesterol test strip.
The invention also provides a method of packaging a dry test strips, the method comprising: providing a first type of dry test strip selected from the group consisting of: test strips for measuring the concentration of high density lipoprotein (HDL) cholesterol, test strips for measuring the concentration of low density lipoprotein (LDL) cholesterol, test strips for measuring the concentration of lipoprotein cholesterol other than HDL and LDL, test strips for measuring total blood cholesterol, and test strips for measuring a ketone; providing a second type of dry test strip selected from the group consisting of: test strips for measuring the concentration of high density lipoprotein (HDL) cholesterol, test strips for measuring the concentration of low density lipoprotein (LDL) cholesterol, test strips for measuring the concentration of lipoprotein cholesterol other than HDL and LDL, test strips for measuring total blood cholesterol, and test strips for measuring a ketone, the second type of dry test strip being a different type than the second type of dry test strip; and packaging the first type of test strip together with the second type of test strip in a single-user container of a size that can be held in one hand by a human being. Preferably, the packaging comprises sealing each of the test strips in an airtight packet and then packing the packets in the container. Preferably, the method further comprises labeling each of the packets with strip-specific scheduling information. Preferably, the packaging comprises placing each of the dry test strips in a separate compartment in the container and sealing the container. Preferably, the method further comprises labeling each of the compartments with strip-specific scheduling information. Preferably, the method further comprises passing the scheduling information from a physician to a dry test strip packager, and the placing is performed by the packager. Preferably, the method further comprises storing strip-specific scheduling information in a form accessible by a dry test strip reader, inserting one of the dry test strips in the strip reader, checking the inserted dry test strip against the strip-specific scheduling information, and informing the user of the reader of whether the test strip has been inserted according to the scheduling information.
In another aspect, the invention provides a method of providing strip-specific scheduling information to a user of a dry test strip, the method comprising: storing the strip specific scheduling information in an electronic memory; placing the electronic memory in a container with one or more dry test strips; removing the electronic memory from the container; inserting the memory into a dry test strip reader; inserting a dry test strip into the reader, and communicating the scheduling information to the user via the dry test strip reader. Preferably, the communicating is selected from the group consisting of audio communication and visual communication.
In a further aspect, the invention provides a system for measuring blood analytes, the system comprising; a dry test strip for measuring the concentration of: high density lipoprotein (HDL) cholesterol; a dry test strip for measuring a triglyceride; a dry test strip for measuring glucose; and a single-user container containing the dry test strips.
In yet another aspect, the invention provides a statin diagnostic pack comprising a single-user container holding two or more different dry test strips selected from the group consisting of an HDL cholesterol test strip, an LDL cholesterol test strip, and a total cholesterol test strip.
In an additional aspect, the invention also provides a method of scheduling a dry test strip test, said method comprising: storing strip-specific scheduling information in a form accessible by a dry test strip reader, inserting a dry test strip in said strip reader, checking said inserted dry test strip against said strip-specific scheduling information, and informing the user of said reader of whether said test strip has been inserted according to said scheduling information.
The invention not only provides a packaging system that takes advantage of the fact that dry test strips can be easily used by unskilled persons, but also permits the unskilled user to follow complex testing schedules accurately, and does this in a cost effective manner. These and other objects and benefits of the invention will become apparent from the following written description when read in conjunction with the accompanying drawing.
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and described in the following. It is understood that no limitation to the scope of the invention is thereby intended. It is further understood that the present invention includes any alterations and modifications to the illustrated embodiments and includes further applications of the principles of the invention as would normally occur to one skilled in the art to which this invention pertains. It should also be understood that, in accordance with the patent law, the drawings are not intended to be precise engineering drawings of the invention, but rather are only intended to illustrate the invention. For example, the scale of the drawings and relative size of the various parts are generally altered so as to better illustrate the invention within the constraints of a written document such as this.
In this disclosure the term “different type of test strip” means that a strip measures a different analyte. In this context, test strips for measuring high density lipoprotein (HDL) cholesterol, test strips for measuring low density lipoprotein (LDL) cholesterol, test strips for measuring lipoprotein cholesterol other than HDL and LDL, test strips for measuring total blood cholesterol, test strips for measuring glucose, test strips for measuring triglycerides, and test strips for measuring a ketone are all “different types” of test strips because they measure different analytes.
Tray 102 also comprises scheduling confirmation information 140 which is visible after a strip is removed from the tray. Scheduling confirmation information 140 permits a user to confirm after a strip is removed what strips have been used and the time the strip was scheduled to be used. Scheduling confirmation information 140 preferably includes date confirmation information 142, analyte confirmation information 144, and physician confirmation information 146, which preferably includes the name 147 of the physician that prescribed the test, and physician contact information 148, which may be a phone number, or an address, such as an email address. Scheduling confirmation information 140 is preferably applied to the bottom 149 of the tray well 112 which held the dry test strip. It may be applied, for example, by direct printing on the tray bottom, or printing on a label which is applied to the tray well bottom. Tray 102 preferably is made of plastic, such as polyethylene or EVA but also may be made of foil or other suitable plastic or metal that can be vapor sealed.
The test strips according to the invention also provide analyte indicators, such as 152, 154 and 156 that indicate to the reader the analyte that the strip measures. In the embodiment of
An exemplary completed packaging system 200 according to the invention is shown in
Another exemplary embodiment 600 of a dry test strip packaging system according to the invention is shown in
The data mentioned above, such as calibration data, directions or prescription data, data regarding sequencing, or timing, or other information may also be communicated to the reader 710 via other storage devices, such as an RFID tag 164 (
If the physician communicates the prescription or other directions to the patient, then the patient may then communicate the prescription to the packager at 808. At 812, the packager applies the prescription of other direction information to the packaging system, such as the system 200, 300, 400, 500, or 600, and/or entered into the memory 740. The dry test strips are then packaged in a container such as 201, 310, 610 as per the prescription or other directions at 816. Preferably, a memory, such as 740, containing the prescription or other direction data is packaged in the container with the strips at 820. The strips are then shipped to the user, or in some cases stored while waiting for sale. It should be understood that in some cases, instead of a prescription or directions from a physician, a standard set of tests following one or more standard test schedules may be packaged, and, in this case, standard directions associated with the strips may be stored on memory 740 and the memory then packaged with the strips as discussed above.
When, at 824, the end user, who may be a patient, obtains the packaged strips, the user opens the container and inserts the memory 740 in the strip reader 710. The reader may download the data in memory 740 to a memory in the reader, or the reader may read the data in the memory only when the data is needed. The strip reader 710 may then communicate, either visually, audibly, or both the test schedule to the user at 830. The user then inserts a strip into the reader at 832. Each time a strip is inserted into strip, the strip reader checks the strips against the prescription or other directions at 834. In the embodiment described, this is done by reading indicators 152, 154 and 156 on the strip. In this embodiment, the indicators are protrusions, each of which activates a switch in reader 710 when they are inserted in receptacles 753, 754 and 755. The indicators may also be mechanical, such as those shown, electrical, such as conductors, optical, such as colored elements or LEDs, or any other suitable indicators. If the strip is not the correct strip, the reader so notifies the user at 836 and the user inserts the correct strip. If the strip is the correct strip, the strip reader reads the strip at 838 and stores the data. Note that, even if the strip is not the correct strip, the reader may note which strip it is, and read the strip and record the data anyway. This is because when a strip is inserted, blood may already have been applied to it and a result for that strip determined, and this prevents waste of a strip. The user may however, insert the strip into the reader prior to use as a check. At 840, the data from the strip is communicated to the user and/or physician. This preferably includes visual communication via the reader display 730, by recording the data in memory 740 and delivering it to the physician's office, by internet, by the user telephoning the physician or by other communication methods.
As discussed above, a feature of the invention is that a plurality of different types of dry test strips are packaged, distributed and sold in a single-user container. “Different types” of dry test strips here means that a first one of said test strips measures a different type of analyte then a second one of said test strips. The limitation of “a single-user container” excludes the situation where a plurality of vials, each containing a number of one type of dry test strip may have been shipped together in another container, since, in that case the plurality of different test strips are in a plurality of containers. Preferably, the single-user container is selected from the group consisting of a bottle, a jar, a vial, a tray, or a blister pack. Preferably, the plurality of dry test strips consists of one-hundred or less of the dry test strips in the single container. More preferably, the plurality of dry test strips consists fifty or less of the dry test strips in the single container. More preferably, the plurality of dry test strips consists twenty-five or less of the dry test strips in the single container. Most preferably, the plurality of dry test strips consists of a dozen or less of the dry test strips in the single container. The forgoing limitations also exclude situations in which a number of different test strips, each type in a different vial, are shipped together, for example in a crate. The container is preferably a container that can be held in one hand by a human being. The container is preferably a single-user container, that is, a container designed to be used by a single user, rather than a container shipped to a distributor, for example. Those skilled in the art understand what is meant by a single-user container.
Another feature of the invention is that a strip-specific schedule for using the plurality of different types of dry test strips is included in the system, the schedule being either in or on the container. A related feature is that the system includes an electronic memory, and the schedule may be stored on the electronic memory. Preferably, the plurality of dry test strips consists of one-hundred or less of the dry test strips in the single container. More preferably, the plurality of dry test strips consists fifty or less of the dry test strips in the single container. More preferably, the plurality of dry test strips consists twenty-five or less of the dry test strips in the single container. Most preferably, the plurality of dry test strips consists of a dozen or less of the dry test strips in the single container.
In another aspect, the invention provides a method of providing scheduling information to a user of a dry test strip, the method comprising storing the scheduling information in an electronic memory; placing the electronic memory in a container with one or more dry test strips; removing the electronic memory from the container; inserting the memory into a dry test strip reader; and communicating the scheduling information to the reader via the dry test strip reader. Preferably, the communicating is selected from the group consisting of audio communication and visual communication. Preferably, the method further comprises passing the scheduling information from a physician to a dry test strip packager, and the placing is performed by the packager. Preferably, the scheduling information is strip-specific scheduling information.
A further feature of the invention is that information concerning the order or use of the test strips and the timing of the use of the test strips appropriate to a particular end user is included in the package. This individualized scheduling information may be provided by the user's physician, and may be communicated to the user via the packager of the test strips.
Once the invention is understood, many new and helpful packaging systems can be imagined. For example, one system might be labeled a statin diagnostic pack. This pack may contain, for example, at least two of an HDL test strip, an LDL test strip and a total cholesterol test strip. Statin drug suppliers may want to include such a pack with their medications, or even give free samples of said packs away. It is known that only 20% of people for which stain drugs are prescribed actually stay on the drug for a year or more. Such statin diagnostic packs would provide an excellent way to show the statin user that the statin drugs are working, and that they should stay on their medications. Such packs would be potential life savers as many of the people that go off their statin drugs become victims of heart attacks.
There has been described a novel dry test strip packaging system and process for prescribing, packaging and using dry test strips that. It should be understood that the particular embodiments shown in the drawings and described within this specification are for purposes of example and should not be construed to limit the invention, which will be described in the claims below. Further, it is evident that those skilled in the art may now make numerous uses and modifications of the specific embodiments described, without departing from the inventive concepts. It is also evident that the methods recited may in many instances be performed in a different order; or equivalent structures and processes may be substituted for the various structures and processes described. Consequently, the invention is to be construed as embracing each and every novel feature and novel combination of features present in and/or possessed by the bodily fluid analysis system herein described.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US09/47653 | 6/17/2009 | WO | 00 | 4/25/2011 |
Number | Date | Country | |
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61073242 | Jun 2008 | US |