Pulsating expression cap

• US 7,201,723 B2
• Filed: 03/25/2004
• Issued: 04/10/2007
• Est. Priority Date: 03/25/2004
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Chan, Frank A.
• Primary Examiner(s): Hindenburg; Max F.
• Assistant Examiner(s): TOWA, RENE T
• Application Number:
  US10/809,725
• Publication Number:
  US 20050215925A1
• Time in Patent Office: 1,111 Days
• Field of Search: 600/573, 600/576, 600/583, 606/181, 606/182
• US Class Current: 600/583
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable

Abstract

A body fluid sampling device includes an expression member placed around an incision in the skin of a user, a compression member to contact and traverse the expression member, and a housing configured to contact the skin near the incision. The expression member is configured to repeatedly move from a relaxed position over the incision to a contracted position over the incision. The expression member is at least partially resilient in order to repeatedly squeeze and/or compress the skin around the incision.

Claims

1. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe; and

the compression member includes at least one compression lobe configured to contact the at least one expression lobe to compress the skin.

2. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe;

the compression member includes at least one compression lobe configured to contact the at least one expression lobe, and the compression lobe is configured to contact and to rotate about the at least one expression lobe to compress the band.

3. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position; and

wherein the expression member includes a skin contacting portion configured to surround the band and wherein the skin contacting portion is moveable between a relaxed position around the incision in skin and a contracted position around the incision to express bodily fluid from the incision in skin.

4. A sampling device, comprising:

an expression member having a skin contacting portion that is moveable between a relaxed position around an incision in skin and a contracted position around the incision in skin to compress and squeeze the skin near the incision;

a compression member configured to contact the skin contacting portion of the expression member to move the skin contacting portion from the relaxed position to the contracted position;

a housing to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one nub; and

the compression member includes at least one bulge configured to contact and rotate about the at least one nub to compress the skin contacting portion.

5. A sampling device, comprising:

an expression member having a skin contacting portion that is moveable between a relaxed position around an incision in skin and a contracted position around the incision in skin to compress and squeeze the skin near the incision;

a compression member configured to contact the skin contacting portion of the expression member to move the skin contacting portion from the relaxed position to the contracted position;

a housing to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one nub;

the compression member includes at least one bulge configured to contact and rotate about the at least one nub to compress the skin contacting portion; and

wherein the nub is made of a non-resilient material.

6. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe, the at least one expression lobe includes a plurality of expression lobes; and

the compression member includes at least one compression lobe configured to contact the at least one expression lobe, to compress the band the at least one compression lobe includes a plurality of compression lobes equal in number to the plurality of expression lobes.

7. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe, the at least one expression lobe includes a plurality of expression lobes; and

the compression member includes at least one compression lobe configured to contact the at least one expression lobe, to compress the band the at least one compression lobe includes a plurality of compression lobes unequal in number to the plurality of expression lobes.

8. A sampling device, comprising:

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe;

the compression member includes at least one compression lobe configured to contact the at least one expression lobe;

the compression lobe is configured to contact and to rotate about the at least one expression lobe to compress the band;

wherein the band is compressed in a symmetrical pattern.

9. A sampling device, comprising;

a lancet configured to form an incision in skin;

an expression member having a band positioned to contact skin that is deformable to squeeze skin around the incision;

wherein the band is moveable between a relaxed position around the incision in skin and a contracted position around the incision in skin;

a compression member configured to contact and rotate about the expression member wherein the band compresses from the relaxed position to the contracted position to express bodily fluid from the incision in skin;

a housing configured to contact the skin near the incision;

wherein at least a portion of the expression member is resilient in order to return to the relaxed position;

the expression member includes at least one expression lobe;

the compression member includes at least one compression lobe configured to contact the at least one expression lobe;

the compression lobe is configured to contact and to rotate about the at least one expression lobe to compress the band;

wherein the band is compressed in an asymmetrical pattern.