CA2216896A1 - Protective sheild for a blood glucose strip - Google Patents
Protective sheild for a blood glucose strip Download PDFInfo
- Publication number
- CA2216896A1 CA2216896A1 CA002216896A CA2216896A CA2216896A1 CA 2216896 A1 CA2216896 A1 CA 2216896A1 CA 002216896 A CA002216896 A CA 002216896A CA 2216896 A CA2216896 A CA 2216896A CA 2216896 A1 CA2216896 A1 CA 2216896A1
- Authority
- CA
- Canada
- Prior art keywords
- strip
- meter
- shield
- sample
- blood glucose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/487—Physical analysis of biological material of liquid biological material
- G01N33/49—Blood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
Abstract
A modified blood glucose test strip reduces the risk of contamination when it is used with a blood glucose meter. The modified strip has adhered to its top surface a protective shield that is preferably cut from a sheet of transparent plastic. The shield permits access to the sample-receiving surface of the strip, but prevents contamination of the meter by the user, because it covers a part of the meter that adjoins the strip when the strip is installed in the meter. Similarly, the shield protects a user from contacting a potentially contaminated area of the meter. The modified strip finds particular advantage in a hospital or other setting where several persons may use the same meter.
Description
; CA 02216896 1997-09-26 PROT~(~TIV~ SHT~T .n FOR A BT .oon C~T I J(-OSF. STRTP
S B~ k~rolln~ of thP TnvPntion 1. Fi~l~l of ~he T. IV--I 11 ;rn This invention relates to a modified blood glucose strip; more partir~ rly, to a blood glucose strip with an integral protective shield to 10 reduce the risk of meter contamination.
S B~ k~rolln~ of thP TnvPntion 1. Fi~l~l of ~he T. IV--I 11 ;rn This invention relates to a modified blood glucose strip; more partir~ rly, to a blood glucose strip with an integral protective shield to 10 reduce the risk of meter contamination.
2. nescrip~ion of ~e l~ te(l ~rt In recent years, the merlir~l diagnostics industry has focll~e~l increasing attention on the health risks posed by bloodborne illnesses, such as AIDS and 15 hepatitis. Thus, diagnoses that involve testing blood must minimize the risk of contaminating equipment and personnel with blood from a patient, as well as the risk of contaminating the patient with blc~d from others.
Among the me-lir~l diagnostic devices that are in most widespread use today is the blood glucose monitor. In the U.S. alone, there are an estimated 1420 million people with diabetes. In order to avoid serious medical problems, such as vision loss, circulatory problems, kidney failure, etc., many of these peoplemonitor their blood glucose on a regular basis and then take the steps n~c~ss~ryto maintain their glucose concentration in an acceptable range.
Blood contamination is of concern when making a blood glucose 25 measurement. For example, when using the most cQInmon types of whole - blood glucose meters (photometric), the glucose determination is generally made from a blood sample that is applied to a test strip that is on the meter. To ; CA 02216896 1997-09-26 apply the patient's finger-stick blood sample, the patient's finger must be positioned above and near to the test strip in order to inoculate the test stripwith the blood sample. There is a risk that the patient's finger may come into contact with a portion of the meter. Although that would not pose a serious S health risk when a meter is used by only one person, it may be a problem when the meter is used in a hospital. In that case, there is a yol~l~Lial for cross-contamination. Blood on the meter also poses a potential hazard to healthcare workers.
A number of ~y~lellls have been rli.crlo5e~1 that are aimed at reducing the lO risk of contamination to a patient and/or to others in connection with diagnostic tests.
U.S. Pat. 4,952,373, issued August 28, 1990, to S~lg~rm~n et al., disdoses a shield that is designed to ~revelll excess liquid on diagnostic cartridges from being transferred to a monitor with which the cartridge is used. The shield is 15 fAhri~te-l from thin plastic or metallic film and is attadhed to a cartridge that is generally the size of a ~edit card.
U.S. Pat. 5,100,620, issued Mardh 31, 1992, to Brenneman, disdoses an inverse funnel shaped body with a central r~pill~ry tube to transport a liquid sample from a remote sample-applic~tion point to a test surface. The device 20 can be used to transfer blood from a finger stick to a reagent film.
mm ~ry of tl~e T- IVt'l) I;( n In accordance with the present il,venlion, a blood glucose monitoring device comprises a) a blood glucose strip of the type that is inserted into a predetermined 25 position in a blood glucose meter and that has a sample-rec~iving area to which ; CA 02216896 1997-09-26 a sample of blood can be applied for a measurement by the meter of a glucose concentration in the sample and b) a protective shield secured to the strip, bounding at least a part of the sample ;eceivillg area, and ~:ove~ g a part of the meter when the strip is in the position.
The device of the yiesellt invention permits a person to use a conventional photometric blood glucose meter with on-meter dosing, but with rerll1ce~ risk that the person will either contaminate the meter or be contaminated by it The device is disposable, and the terms "device" and "disposable" are used interchangeably throughout this sperifit ~hon and the appended daims.
Bri~f nesrrip~ion of thP nr~W;l~,S
Fig. 1 is an exploded perspective view of a device of this illv~:nLion and a meter that it is used with.
Fig. 2 is a perspective view of the device of Fig. 1 installed in the meter of Fig. 1.
Fig. 3 is a top plan view of a device of tLis invention.
Fig. 4 is a cross-sectional view of the device of Fig. 3.
Fig. 5 is a top plan view of an alternative embodiment of a device of this invention.
Fig. 6 is a cross-sectional view of the device of Fig. 5 1 )et~ile-l nes(~ription of the Tnv~ntil~n Blood glucose monitors that involve "on-meter dosing" are well known in the art and are typified by the One Touch(~) group of meters from LifeScan, Inc., Milpitas, CA. Those meters involve the use of a strip that is impregnated with a reagent that causes a color change that can be related to the glucose concentration in a whole-blood sample applied to the strip. In practice, a user ; CA 02216896 1997-09-26 first inserts a blood glucose strip into the meter, and then applies to a designated area on the top ("sample") surface of the strip a sample of his/her blood. As the sample passes through the strip toward the other ("testing") surface, glucose in the sample reacts with the reagent to cause a change in strip S r~fl~ct~nce at the testing surface. This change in r~fl~ct~nce can be related to the glllrose concentration in the blood sample.
Since persons with diabetes, for whom blood glucose meters are intended, often are visually impaired, they may find it difficult to apply a blood sample from a finger stick onto the designated area on the strip. They may 10 inadve~ lly touch their blood to a part of the meter, near that designated area on the strip. Thereafter, a later user - who, par~irlll~rly in a hospital setting, may be a different person - may come into contact with the previous user's blood. The device of the present invention addresses the problems of contamination of blood glucose meters with blood from a user and 15 contamination of a user with (a previous user's) blood from a meter. It does so, by providing a shield, which is secured to the strip, bounds at least a part of the sample-receiving area of the strip, and covers part of the meter when the strip is in position. By stating that the shield "bounds at least a part of the sample-receiving area" we mean that it adjoins part of ~at area, possibly, but not 20 I-Press~rily~ surrounding the area. The primary purpose of the shield is to ~ venL contamination of the meter with the user's blood, and that purpose does not require the shield to surround the sample-receiving area. I~ the shieldsurrounds the area, for example, by incol~oidlillg a through hole aligned with the area, it helps the user apply the sample in the proper place. Optionally, the 25 user may be further assisted by a target imprinted on the shield to help locate the area. The target may be a graphic design printed on the shield; for CA 022l6896 l997-09-26 example, a circle or any other kind of assistance pattern applied to the shield.The shield is col,velliently secured to the strip by an adhesive that surrounds the through hole. If the shield does not surround the sample-receivi-lg area, then it has a longer edge, along which it is co,lv~:llient to apply adhesive forbonding to the strip over a larger area. Although any flexible sheet mAtPriAl would be suitable, the shield is ~.rerer~bly cut from a sheet of transparent, flexible plastic. There are a number of well-known thermoplastic m;~tPri~l~ thatare suitable; e.g. polyester, polycarbonate, poly~lyr~ne, etc. The thickness is not ~riti~ Al, but is typically in the range from about 0.05 to about 0.2 mm.
Fig. 1 is an exploded perspective view showing a device 10 of the present il~vt:l~lion and a meter 12. Device 10 consists of a test strip 14 and shield 16.
Test strip 14 includes a holder, or handle, 18 and reagent pad 20. Shield 16 is adhered to holder 18 of test strip 14 with adhesive 22. In use, strip 14 is inserted into slot 24, while shield 16 covers the area 26 that adjoins the slot lS Fig. 2 is a perspective view of the device 10 mounted in meter 12 and ready for a blood sample to be applied to sam~le-receivil-g area 28 of strip 14.Area 28 is surrounded by adhesive 22. Shield 16 covers adjoining areas of the meter and presents them from becoming contaminated with blood.
Fig. 3iS a top plan view of a device 10 of this invention, showing holder 18 of strip 14 adhered with adhesive 22 to shield 16. Optional target 29 surrounds the sample-receiving area 28 of strip 14 to help a user locate that area.
Fig. 4 is a sectional view of the device of Fig. 3, taken along line 4-4 of Fig.3. As is dear from Fig. 4, the sample-receiving area 28 of strip 14 is at the top surface of reagent pad 20. Through holes 30 and 32 of shield 16 and holder 18, respectively, are co-aligned over sample-receiving area 28.
; CA 02216896 1997-09-26 Fig. 5 is a top plan view of an alternative embodiment of a device of this invention. In the embodiment shown, shield 116 has a U-shaped cutout.
Adhesive 122 adheres shield 116 to holder 18 of strip 14 along the perimeter of the cutout.
S Fig. 6 depicts a cross section taken along line 6-6 of Fig. 5. Hole 32 of holder 18 overlies sample-receiving area 28 of strip 14, which is at the top surface of reagent pad 20.
It will be understood by those skille-l in the art that the foregoing descriptions of embodiments of this invention are illustrative of practicing theinvention but are in no way limiting. V~ri~tinrls of the detail presented may bemade without departing from the scope and spirit of the present illv~:nLion.
".
Among the me-lir~l diagnostic devices that are in most widespread use today is the blood glucose monitor. In the U.S. alone, there are an estimated 1420 million people with diabetes. In order to avoid serious medical problems, such as vision loss, circulatory problems, kidney failure, etc., many of these peoplemonitor their blood glucose on a regular basis and then take the steps n~c~ss~ryto maintain their glucose concentration in an acceptable range.
Blood contamination is of concern when making a blood glucose 25 measurement. For example, when using the most cQInmon types of whole - blood glucose meters (photometric), the glucose determination is generally made from a blood sample that is applied to a test strip that is on the meter. To ; CA 02216896 1997-09-26 apply the patient's finger-stick blood sample, the patient's finger must be positioned above and near to the test strip in order to inoculate the test stripwith the blood sample. There is a risk that the patient's finger may come into contact with a portion of the meter. Although that would not pose a serious S health risk when a meter is used by only one person, it may be a problem when the meter is used in a hospital. In that case, there is a yol~l~Lial for cross-contamination. Blood on the meter also poses a potential hazard to healthcare workers.
A number of ~y~lellls have been rli.crlo5e~1 that are aimed at reducing the lO risk of contamination to a patient and/or to others in connection with diagnostic tests.
U.S. Pat. 4,952,373, issued August 28, 1990, to S~lg~rm~n et al., disdoses a shield that is designed to ~revelll excess liquid on diagnostic cartridges from being transferred to a monitor with which the cartridge is used. The shield is 15 fAhri~te-l from thin plastic or metallic film and is attadhed to a cartridge that is generally the size of a ~edit card.
U.S. Pat. 5,100,620, issued Mardh 31, 1992, to Brenneman, disdoses an inverse funnel shaped body with a central r~pill~ry tube to transport a liquid sample from a remote sample-applic~tion point to a test surface. The device 20 can be used to transfer blood from a finger stick to a reagent film.
mm ~ry of tl~e T- IVt'l) I;( n In accordance with the present il,venlion, a blood glucose monitoring device comprises a) a blood glucose strip of the type that is inserted into a predetermined 25 position in a blood glucose meter and that has a sample-rec~iving area to which ; CA 02216896 1997-09-26 a sample of blood can be applied for a measurement by the meter of a glucose concentration in the sample and b) a protective shield secured to the strip, bounding at least a part of the sample ;eceivillg area, and ~:ove~ g a part of the meter when the strip is in the position.
The device of the yiesellt invention permits a person to use a conventional photometric blood glucose meter with on-meter dosing, but with rerll1ce~ risk that the person will either contaminate the meter or be contaminated by it The device is disposable, and the terms "device" and "disposable" are used interchangeably throughout this sperifit ~hon and the appended daims.
Bri~f nesrrip~ion of thP nr~W;l~,S
Fig. 1 is an exploded perspective view of a device of this illv~:nLion and a meter that it is used with.
Fig. 2 is a perspective view of the device of Fig. 1 installed in the meter of Fig. 1.
Fig. 3 is a top plan view of a device of tLis invention.
Fig. 4 is a cross-sectional view of the device of Fig. 3.
Fig. 5 is a top plan view of an alternative embodiment of a device of this invention.
Fig. 6 is a cross-sectional view of the device of Fig. 5 1 )et~ile-l nes(~ription of the Tnv~ntil~n Blood glucose monitors that involve "on-meter dosing" are well known in the art and are typified by the One Touch(~) group of meters from LifeScan, Inc., Milpitas, CA. Those meters involve the use of a strip that is impregnated with a reagent that causes a color change that can be related to the glucose concentration in a whole-blood sample applied to the strip. In practice, a user ; CA 02216896 1997-09-26 first inserts a blood glucose strip into the meter, and then applies to a designated area on the top ("sample") surface of the strip a sample of his/her blood. As the sample passes through the strip toward the other ("testing") surface, glucose in the sample reacts with the reagent to cause a change in strip S r~fl~ct~nce at the testing surface. This change in r~fl~ct~nce can be related to the glllrose concentration in the blood sample.
Since persons with diabetes, for whom blood glucose meters are intended, often are visually impaired, they may find it difficult to apply a blood sample from a finger stick onto the designated area on the strip. They may 10 inadve~ lly touch their blood to a part of the meter, near that designated area on the strip. Thereafter, a later user - who, par~irlll~rly in a hospital setting, may be a different person - may come into contact with the previous user's blood. The device of the present invention addresses the problems of contamination of blood glucose meters with blood from a user and 15 contamination of a user with (a previous user's) blood from a meter. It does so, by providing a shield, which is secured to the strip, bounds at least a part of the sample-receiving area of the strip, and covers part of the meter when the strip is in position. By stating that the shield "bounds at least a part of the sample-receiving area" we mean that it adjoins part of ~at area, possibly, but not 20 I-Press~rily~ surrounding the area. The primary purpose of the shield is to ~ venL contamination of the meter with the user's blood, and that purpose does not require the shield to surround the sample-receiving area. I~ the shieldsurrounds the area, for example, by incol~oidlillg a through hole aligned with the area, it helps the user apply the sample in the proper place. Optionally, the 25 user may be further assisted by a target imprinted on the shield to help locate the area. The target may be a graphic design printed on the shield; for CA 022l6896 l997-09-26 example, a circle or any other kind of assistance pattern applied to the shield.The shield is col,velliently secured to the strip by an adhesive that surrounds the through hole. If the shield does not surround the sample-receivi-lg area, then it has a longer edge, along which it is co,lv~:llient to apply adhesive forbonding to the strip over a larger area. Although any flexible sheet mAtPriAl would be suitable, the shield is ~.rerer~bly cut from a sheet of transparent, flexible plastic. There are a number of well-known thermoplastic m;~tPri~l~ thatare suitable; e.g. polyester, polycarbonate, poly~lyr~ne, etc. The thickness is not ~riti~ Al, but is typically in the range from about 0.05 to about 0.2 mm.
Fig. 1 is an exploded perspective view showing a device 10 of the present il~vt:l~lion and a meter 12. Device 10 consists of a test strip 14 and shield 16.
Test strip 14 includes a holder, or handle, 18 and reagent pad 20. Shield 16 is adhered to holder 18 of test strip 14 with adhesive 22. In use, strip 14 is inserted into slot 24, while shield 16 covers the area 26 that adjoins the slot lS Fig. 2 is a perspective view of the device 10 mounted in meter 12 and ready for a blood sample to be applied to sam~le-receivil-g area 28 of strip 14.Area 28 is surrounded by adhesive 22. Shield 16 covers adjoining areas of the meter and presents them from becoming contaminated with blood.
Fig. 3iS a top plan view of a device 10 of this invention, showing holder 18 of strip 14 adhered with adhesive 22 to shield 16. Optional target 29 surrounds the sample-receiving area 28 of strip 14 to help a user locate that area.
Fig. 4 is a sectional view of the device of Fig. 3, taken along line 4-4 of Fig.3. As is dear from Fig. 4, the sample-receiving area 28 of strip 14 is at the top surface of reagent pad 20. Through holes 30 and 32 of shield 16 and holder 18, respectively, are co-aligned over sample-receiving area 28.
; CA 02216896 1997-09-26 Fig. 5 is a top plan view of an alternative embodiment of a device of this invention. In the embodiment shown, shield 116 has a U-shaped cutout.
Adhesive 122 adheres shield 116 to holder 18 of strip 14 along the perimeter of the cutout.
S Fig. 6 depicts a cross section taken along line 6-6 of Fig. 5. Hole 32 of holder 18 overlies sample-receiving area 28 of strip 14, which is at the top surface of reagent pad 20.
It will be understood by those skille-l in the art that the foregoing descriptions of embodiments of this invention are illustrative of practicing theinvention but are in no way limiting. V~ri~tinrls of the detail presented may bemade without departing from the scope and spirit of the present illv~:nLion.
".
Claims (5)
1. A blood glucose monitoring device, comprising a. a blood glucose strip of the type that is inserted into a predetermined position in a blood glucose meter and that has a sample-receiving area to which a sample of blood can be applied for a measurement by the meter of a glucose concentration in the sample and b. a protective shield secured to the strip, bounding at least a part of the sample-receiving area, and covering a part of the meter when the strip isin the position.
2. The monitoring device of claim 1 in which the shield comprises a substantially transparent thermoplastic sheet.
3. The monitoring device of claim 1 in which the shield has a through hole that is substantially aligned with the sample-receiving area.
4. The monitoring device of claim 3 in which the shield is secured to the strip with an adhesive that surrounds the through hole.
5. The monitoring device of claim 3 in which a target imprinted on the shield locates the through hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/723,040 US5714123A (en) | 1996-09-30 | 1996-09-30 | Protective shield for a blood glucose strip |
| US08/723,040 | 1996-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2216896A1 true CA2216896A1 (en) | 1998-03-30 |
Family
ID=24904564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002216896A Abandoned CA2216896A1 (en) | 1996-09-30 | 1997-09-26 | Protective sheild for a blood glucose strip |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5714123A (en) |
| EP (1) | EP0832691A3 (en) |
| KR (1) | KR19980025107A (en) |
| CN (1) | CN1127663C (en) |
| AR (1) | AR008863A1 (en) |
| AU (1) | AU710509B2 (en) |
| BR (1) | BR9704928A (en) |
| CA (1) | CA2216896A1 (en) |
| HU (1) | HU223207B1 (en) |
| IL (1) | IL121822A (en) |
| MX (1) | MXPA97007460A (en) |
| MY (1) | MY117115A (en) |
| NO (1) | NO974491L (en) |
| RU (1) | RU2194446C2 (en) |
| SG (1) | SG74024A1 (en) |
| TW (1) | TW372189B (en) |
| ZA (1) | ZA978718B (en) |
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| AU710509B2 (en) | 1999-09-23 |
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| AR008863A1 (en) | 2000-02-23 |
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| EEER | Examination request | ||
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