CA2373853A1 - Split pressure ring for lancing device and method of operation - Google Patents
Split pressure ring for lancing device and method of operation Download PDFInfo
- Publication number
- CA2373853A1 CA2373853A1 CA002373853A CA2373853A CA2373853A1 CA 2373853 A1 CA2373853 A1 CA 2373853A1 CA 002373853 A CA002373853 A CA 002373853A CA 2373853 A CA2373853 A CA 2373853A CA 2373853 A1 CA2373853 A1 CA 2373853A1
- Authority
- CA
- Canada
- Prior art keywords
- pressure ring
- flared portion
- lancing device
- skirt
- collar
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150053—Details for enhanced collection of blood or interstitial fluid at the sample site, e.g. by applying compression, heat, vibration, ultrasound, suction or vacuum to tissue; for reduction of pain or discomfort; Skin piercing elements, e.g. blades, needles, lancets or canulas, with adjustable piercing speed
- A61B5/150061—Means for enhancing collection
- A61B5/150068—Means for enhancing collection by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
- A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
Abstract
A pressure ring for a lancing device for holding open a skin puncture while collecting a blood sample includes a col-lar that fits onto the end of a lancing device. A skirt is provided on the collar and a flared portion depends from the skirt. At least one axial slit is formed in the skirt. The pressure ring is made of a flexible material such as polypro-pylene such that when the lancing device with a pressure ring is placed on a person's skin and pressure is applied, the slits spread apart stretching the skin for a puncture by a lance in the lancing device. Once a puncture has been made, the pressure ring holds the puncture wound open to allow bleeding. Removing the lancing device from the puncture site releases the skin allowing the puncture would to close.
Description
SPLIT PRESSURE RING FOR LANCING DEVICE
AND ~dBTHOD OF OPERATION
Field of the Invention The present invention generally relates to a split pres-sure ring for a lancing device and, more particularly, to a pressure ring with at least one slit that is pressed against skin causing the split in the ring to spread apart thereby tightening the skin for a puncture and drawing of a blood sam-ple.
Hackgrouad of the Invention Many people for health reasons are required to test their blood several times a day. For example, diabetics must fre-quently test the level of glucose in their blood throughout each day. To perform these tests a sample of blood is needed and this is typically collected by a lancing device and tested by a glucometer. The lancing device drives a lance into the skin to form a puncture wound. The lancing device is then re-moved and the user manually squeezes or massages the puncture site until enough blood is obtained to perform a test . It is desirable to eliminate the need for a user to squeeze or mas-sage the puncture site to obtain blood since squeezing or mas-saging can cause discomfort. One example of a device seeking to avoid the manual squeezing is provided by Amira Medical in Scotts Valley, California. They sell the AtLast blood glucose system. This system includes a rigid tube used with a press and release motion to draw blood to the surface of the punc-ture. Another example is a product called Thera Sense Free Style made by Thera Sense in Alameda, California. This is a blood glucose monitoring system which includes a lancing de-vice with a molded pressure ring that is part of an end cap on the lancing device. The molded pressure ring is not split.
AND ~dBTHOD OF OPERATION
Field of the Invention The present invention generally relates to a split pres-sure ring for a lancing device and, more particularly, to a pressure ring with at least one slit that is pressed against skin causing the split in the ring to spread apart thereby tightening the skin for a puncture and drawing of a blood sam-ple.
Hackgrouad of the Invention Many people for health reasons are required to test their blood several times a day. For example, diabetics must fre-quently test the level of glucose in their blood throughout each day. To perform these tests a sample of blood is needed and this is typically collected by a lancing device and tested by a glucometer. The lancing device drives a lance into the skin to form a puncture wound. The lancing device is then re-moved and the user manually squeezes or massages the puncture site until enough blood is obtained to perform a test . It is desirable to eliminate the need for a user to squeeze or mas-sage the puncture site to obtain blood since squeezing or mas-saging can cause discomfort. One example of a device seeking to avoid the manual squeezing is provided by Amira Medical in Scotts Valley, California. They sell the AtLast blood glucose system. This system includes a rigid tube used with a press and release motion to draw blood to the surface of the punc-ture. Another example is a product called Thera Sense Free Style made by Thera Sense in Alameda, California. This is a blood glucose monitoring system which includes a lancing de-vice with a molded pressure ring that is part of an end cap on the lancing device. The molded pressure ring is not split.
Su~moaary of the Invention The present invention provides a device for and a method of drawing blood from a puncture site . The device is a split pressure ring that fits on an end of a lancing device. The split pressure ring includes a collar that encircles an end of a lancing device . The split pressure ring further includes a skirt extending from the collar and into a linear or curvilin-ear flared portion. The flared portion is terminated by a rim and at least one slit is formed in the rim and the flared por-tion. The split pressure ring is formed of a flexible mate-rial and this with the slit allows the pressure ring to flex and the slit to spread when force is applied. Thus, when the pressure ring is pressed against skin at a puncture site, the ring deforms causing the slit to spread apart and stretch the skin for lancing and to draw blood after the skin has been lanced.
Brief Description of the Drawings Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:
Fig. 1 is a front elevation view of a prior art rigid tube pressure ring;
Fig. 2 is a plan view of a split pressure ring con-structed in accordance with the principles of the present in-vention;
Fig. 3 is a view taken along line 3-3 of Fig. 2;
Fig. 4 is a plan view of the split pressure ring of Figs.
2-3 mounted on a lancing device; and Fig. 5 is a plan view of an alternative embodiment of the split pressure ring illustrated in Figs. 2-4.
While the invention is susceptible to various modifica-tions and alternative forms, a specific embodiment thereof has been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to limit the invention to the particu-lar forms disclosed, but an the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Detailed Description of the Preferred Embodiments A prior art rigid tube pressure ring 10 is illustrated in Fig. 1. The rigid tube pressure ring 10 is of the type used in the Amira Medical AtLast blood glucose system. The rigid tube pressure ring 10 includes a collar 12 that fits onto a lancing device (not shown) . A straight skirt 14 extends from the collar 12. The rigid tube pressure ring 10 is formed of an inflexible material. To obtain a sample of blood, a lower end 16 of the skirt 14 is pressed on the skin around a punc-ture and a press and release motion draws blood to the sur-face. The inflexibility of the rigid tube pressure ring 10 is uncomfortable to the user and does not quickly and easily draw sufficient blood needed for testing.
The split pressure ring 110 illustrated in Figs. 2-4 overcomes these deficiencies by being flexible and functioning differently. The flexibility of the split pressure ring 110 is provided by the material from which the split pressure ring 110 is formed and the inclusion of one or more longitudinal slits 112 extending parallel to the central axis of the split pressure ring 110. The split pressure ring 110 functions by the slits 112 spreading apart when the split pressure ring 110 is placed on a puncture site and axial pressure is applied.
This spreading apart of the slits 112 stretches the skin be-fore puncture and holds the wound open after puncture until enough sample bleeds from the wound for testing.
The split pressure ring 110 includes a collar 114 that fits over an end 116 of a lancing device 118. The collar 114 includes a central bore 120 that fits over and around the end 116 of the lancing device 118.
The lancing device 118 includes a body 122 that houses a lance and a driving mechanism for driving the lance out of the end 116 and into skin at a puncture site. The driving mecha-nism is cocked by a top or knob 124 on the body 122 and is re-leased to drive the lance by a button 126.
The split pressure ring 110 includes a skirt 128 extend-ing from the collar 114. The collar 114 and the skirt 128 have a central passage 130 along which the lance is driven. A
flared portion 132 terminating in a rim 134 extends from the skirt 128. The flared portion 132 is curvilinear and, in a preferred embodiment, at a radius of approximately .095 inch.
This radius adds flexibility to the flared portion 132 but other radii can be used.
The entire split pressure ring 110 and in particular the skirt 128, the flared portion 132 and the rim 134 are formed of flexible material such as polypropylene or DELRIN~. In ad-dition, the four longitudinal slits 112 spaced approximately 90° apart are formed in the rim 134, the flared portion 132, the skirt 128 and part of the collar 114. The flexible mate-rial and the slits 112 provide a flexible split pressure ring 110 in which the slits 112 spread apart and the split pressure ring 110 slides along its central axis as a controlled axial force is applied to the split pressure ring 110.
To use the blood drawing system defined by the lancing device 118 and the split pressure ring 110, the end 116 of the lancing device 118 is inserted into the central bore 120 of the collar 114. The assembled blood drawing system is placed on a puncture site by placing the rim 134 on the skin of a user or patient . A controlled force is applied to the split pressure ring 110 pressing the lancing device 118 toward the puncture site. This controlled force causes deformation of the skirt 128, the flared portion 132 and the rim 134 and spreads apart the slits 112. This deformation and spreading stretches the skin at the puncture site. The driving mecha-nism of the lancing device 118 is activated by pressing the button 126 and the lance is driven out of the end 116 of the lancing device 118, along the passage 130 and into the stretched skin of the user. The lance is withdrawn and the controlled force on the split pressure ring 110 is maintained thereby holding the puncture wound open. Once enough sample has bled from the puncture wound, the controlled force is re-leased and the blood drawing system is lifted from the punc-ture site allowing the wound to close and begin healing. A
sensor, test strip or other device may be applied to the sam-ple for testing.
An alternative embodiment of the split pressure ring 110 is illustrated in Fig. 5. The alternative split pressure ring 210 is similar to the split pressure ring 110 in that it in-cludes a collar 212, a central bore 214 in the collar 212, a skirt 216 depending from the collar 212, and a passage 218 ex-tending through the skirt 216. The alternative split pressure ring 210 differs from the split pressure ring 110 in that it includes a linear flared portion 220 that terminates in a rim 222. The angle a of the linear flared portion 220 is approxi-mately 135°.
The alternative split pressure ring 210 is made of the same flexible material as the split pressure ring 110 and in-cludes longitudinal slits 224 in the rim 222, linear flared portion 220, skirt 216 and part of the collar 212. With this material and structure the alternative split pressure ring 210 operates in the same way as the split pressure ring 110.
While the present invention has been described with ref-erence to one or more particular embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present in-vention. Each of these embodiments and obvious variations thereof is contemplated as falling within the spirit and scope of the claimed invention, which is set forth in the following claims.
Brief Description of the Drawings Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:
Fig. 1 is a front elevation view of a prior art rigid tube pressure ring;
Fig. 2 is a plan view of a split pressure ring con-structed in accordance with the principles of the present in-vention;
Fig. 3 is a view taken along line 3-3 of Fig. 2;
Fig. 4 is a plan view of the split pressure ring of Figs.
2-3 mounted on a lancing device; and Fig. 5 is a plan view of an alternative embodiment of the split pressure ring illustrated in Figs. 2-4.
While the invention is susceptible to various modifica-tions and alternative forms, a specific embodiment thereof has been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to limit the invention to the particu-lar forms disclosed, but an the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Detailed Description of the Preferred Embodiments A prior art rigid tube pressure ring 10 is illustrated in Fig. 1. The rigid tube pressure ring 10 is of the type used in the Amira Medical AtLast blood glucose system. The rigid tube pressure ring 10 includes a collar 12 that fits onto a lancing device (not shown) . A straight skirt 14 extends from the collar 12. The rigid tube pressure ring 10 is formed of an inflexible material. To obtain a sample of blood, a lower end 16 of the skirt 14 is pressed on the skin around a punc-ture and a press and release motion draws blood to the sur-face. The inflexibility of the rigid tube pressure ring 10 is uncomfortable to the user and does not quickly and easily draw sufficient blood needed for testing.
The split pressure ring 110 illustrated in Figs. 2-4 overcomes these deficiencies by being flexible and functioning differently. The flexibility of the split pressure ring 110 is provided by the material from which the split pressure ring 110 is formed and the inclusion of one or more longitudinal slits 112 extending parallel to the central axis of the split pressure ring 110. The split pressure ring 110 functions by the slits 112 spreading apart when the split pressure ring 110 is placed on a puncture site and axial pressure is applied.
This spreading apart of the slits 112 stretches the skin be-fore puncture and holds the wound open after puncture until enough sample bleeds from the wound for testing.
The split pressure ring 110 includes a collar 114 that fits over an end 116 of a lancing device 118. The collar 114 includes a central bore 120 that fits over and around the end 116 of the lancing device 118.
The lancing device 118 includes a body 122 that houses a lance and a driving mechanism for driving the lance out of the end 116 and into skin at a puncture site. The driving mecha-nism is cocked by a top or knob 124 on the body 122 and is re-leased to drive the lance by a button 126.
The split pressure ring 110 includes a skirt 128 extend-ing from the collar 114. The collar 114 and the skirt 128 have a central passage 130 along which the lance is driven. A
flared portion 132 terminating in a rim 134 extends from the skirt 128. The flared portion 132 is curvilinear and, in a preferred embodiment, at a radius of approximately .095 inch.
This radius adds flexibility to the flared portion 132 but other radii can be used.
The entire split pressure ring 110 and in particular the skirt 128, the flared portion 132 and the rim 134 are formed of flexible material such as polypropylene or DELRIN~. In ad-dition, the four longitudinal slits 112 spaced approximately 90° apart are formed in the rim 134, the flared portion 132, the skirt 128 and part of the collar 114. The flexible mate-rial and the slits 112 provide a flexible split pressure ring 110 in which the slits 112 spread apart and the split pressure ring 110 slides along its central axis as a controlled axial force is applied to the split pressure ring 110.
To use the blood drawing system defined by the lancing device 118 and the split pressure ring 110, the end 116 of the lancing device 118 is inserted into the central bore 120 of the collar 114. The assembled blood drawing system is placed on a puncture site by placing the rim 134 on the skin of a user or patient . A controlled force is applied to the split pressure ring 110 pressing the lancing device 118 toward the puncture site. This controlled force causes deformation of the skirt 128, the flared portion 132 and the rim 134 and spreads apart the slits 112. This deformation and spreading stretches the skin at the puncture site. The driving mecha-nism of the lancing device 118 is activated by pressing the button 126 and the lance is driven out of the end 116 of the lancing device 118, along the passage 130 and into the stretched skin of the user. The lance is withdrawn and the controlled force on the split pressure ring 110 is maintained thereby holding the puncture wound open. Once enough sample has bled from the puncture wound, the controlled force is re-leased and the blood drawing system is lifted from the punc-ture site allowing the wound to close and begin healing. A
sensor, test strip or other device may be applied to the sam-ple for testing.
An alternative embodiment of the split pressure ring 110 is illustrated in Fig. 5. The alternative split pressure ring 210 is similar to the split pressure ring 110 in that it in-cludes a collar 212, a central bore 214 in the collar 212, a skirt 216 depending from the collar 212, and a passage 218 ex-tending through the skirt 216. The alternative split pressure ring 210 differs from the split pressure ring 110 in that it includes a linear flared portion 220 that terminates in a rim 222. The angle a of the linear flared portion 220 is approxi-mately 135°.
The alternative split pressure ring 210 is made of the same flexible material as the split pressure ring 110 and in-cludes longitudinal slits 224 in the rim 222, linear flared portion 220, skirt 216 and part of the collar 212. With this material and structure the alternative split pressure ring 210 operates in the same way as the split pressure ring 110.
While the present invention has been described with ref-erence to one or more particular embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present in-vention. Each of these embodiments and obvious variations thereof is contemplated as falling within the spirit and scope of the claimed invention, which is set forth in the following claims.
Claims (20)
1. A pressure ring for a lancing device, comprising:
a collar configured to fit on an end of a lancing device;
a skirt on said collar;
a flared portion flaring from said skirt; and at least one longitudinal slit in said flared portion.
a collar configured to fit on an end of a lancing device;
a skirt on said collar;
a flared portion flaring from said skirt; and at least one longitudinal slit in said flared portion.
2. The pressure ring claimed in claim 1 comprising four equally spaced longitudinal slits in said skirt.
3. The pressure ring claimed in claim 1 said flared portion being linear.
4. The pressure ring claimed in claim 1 said flared portion being linear and at an angle of about 135° to the longitudinal axis of said skin pressure ring.
5. The pressure ring claimed in claim 1 said flared portion being curvilinear.
6. The pressure ring claimed in claim 1 said flared portion being curvilinear and of a radius of about .095 inch.
7. The pressure ring claimed in claim 1 comprising a rim on said flared portion.
8. The pressure ring claimed in claim 1 said collar, skirt and flared portion formed of polypropylene.
9. The pressure ring claimed in claim 1 said collar, skirt and flared portion formed of DELRIN.
10. A system for drawing blood, comprising:
a lancing device including a first end, a lance mounted in said lancing device, a lance driver in said lancing device for driving said lance out of said first end, and a pressure ring mounted on said first end of said lancing device, said pressure ring including a collar, a skirt extend-ing from said collar, a flared portion extending from said skirt, and at least one slit in said flared portion.
a lancing device including a first end, a lance mounted in said lancing device, a lance driver in said lancing device for driving said lance out of said first end, and a pressure ring mounted on said first end of said lancing device, said pressure ring including a collar, a skirt extend-ing from said collar, a flared portion extending from said skirt, and at least one slit in said flared portion.
11. The system claimed in claim 10 said at least one slit ex-tending parallel to a central axis of said pressure ring.
12. The system claimed in claim 10 comprising four slits ex-tending through said flared portion and said skirt equally spaced around said pressure ring.
13. The system claimed in claim 10 said flared portion being linear.
14. The system claimed in claim 10 said flared portion being curvilinear.
15. The system claimed in claim 10 said pressure ring being polypropylene.
16. The system claimed in claim 10 said pressure ring being DELRIN.
17. The system claimed in claim 10 said pressure ring includ-ing a rim on said flared portion.
18. The system claimed in claim 10 said at least one slit ex-tending at least partially into said collar.
19. A method of applying pressure on a puncture site of a lancing device, said lancing device including a body with a first end, a lance in said body and a driver for driving said lance out of said first end and into a puncture site, a pres-sure ring mounted on said first end of said body of said lanc-ing device, said pressure ring including a skirt and flared portion and at least one slit in said flared portion, compris-ing:
placing the flared portion of said pressure ring on a puncture site; and applying force on said pressure ring to deform at least said flared portion of said pressure ring.
placing the flared portion of said pressure ring on a puncture site; and applying force on said pressure ring to deform at least said flared portion of said pressure ring.
20. The method of applying pressure on a puncture site claimed in claim 19 comprising driving said lance into said pressure site; and maintaining said force on said pressure ring until suffi-cient sample is drawn from said puncture site.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27853701P | 2001-03-26 | 2001-03-26 | |
| US60/278,537 | 2001-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2373853A1 true CA2373853A1 (en) | 2002-09-26 |
Family
ID=23065355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002373853A Abandoned CA2373853A1 (en) | 2001-03-26 | 2002-02-28 | Split pressure ring for lancing device and method of operation |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6752817B2 (en) |
| EP (1) | EP1245187B1 (en) |
| JP (1) | JP2002315741A (en) |
| AT (1) | ATE339916T1 (en) |
| AU (1) | AU781117B2 (en) |
| CA (1) | CA2373853A1 (en) |
| DE (1) | DE60214788T2 (en) |
| DK (1) | DK1245187T3 (en) |
| ES (1) | ES2272588T3 (en) |
| PT (1) | PT1245187E (en) |
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2002
- 2002-02-20 US US10/078,519 patent/US6752817B2/en not_active Expired - Lifetime
- 2002-02-28 CA CA002373853A patent/CA2373853A1/en not_active Abandoned
- 2002-03-06 AU AU21301/02A patent/AU781117B2/en not_active Ceased
- 2002-03-13 AT AT02005311T patent/ATE339916T1/en not_active IP Right Cessation
- 2002-03-13 PT PT02005311T patent/PT1245187E/en unknown
- 2002-03-13 EP EP02005311A patent/EP1245187B1/en not_active Expired - Lifetime
- 2002-03-13 DE DE60214788T patent/DE60214788T2/en not_active Expired - Fee Related
- 2002-03-13 ES ES02005311T patent/ES2272588T3/en not_active Expired - Lifetime
- 2002-03-13 DK DK02005311T patent/DK1245187T3/en active
- 2002-03-19 JP JP2002076121A patent/JP2002315741A/en active Pending
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| US20020138040A1 (en) | 2002-09-26 |
| EP1245187B1 (en) | 2006-09-20 |
| DE60214788D1 (en) | 2006-11-02 |
| ATE339916T1 (en) | 2006-10-15 |
| DK1245187T3 (en) | 2007-01-22 |
| ES2272588T3 (en) | 2007-05-01 |
| JP2002315741A (en) | 2002-10-29 |
| AU781117B2 (en) | 2005-05-05 |
| EP1245187A1 (en) | 2002-10-02 |
| DE60214788T2 (en) | 2007-10-11 |
| AU2130102A (en) | 2002-10-03 |
| US6752817B2 (en) | 2004-06-22 |
| PT1245187E (en) | 2007-01-31 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20090302 |