System for withdrawing body fluid

• US 6,679,852 B1
• Filed: 07/12/2000
• Issued: 01/20/2004
• Est. Priority Date: 05/26/2000
• Status: Expired due to Fees

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Corporation (Roche Holding AG)
• Inventors: Weiss, Thomas, Forster, Richard, Deck, Frank, Schmelzeisen-Redeker, Guenther
• Primary Examiner(s): Denion, Thomas
• Assistant Examiner(s): Chang, Ching
• Application Number:
  US09/614,269
• Time in Patent Office: 1,287 Days
• Field of Search: 600/573, 600/583, 606/181, 606/182, 606/183
• US Class Current: 600/583
• CPC Class Codes: A61B 2010/008 Interstitial fluid
• 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 5/150175 Adjustment of penetration depth
• 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 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• 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 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit

Abstract

System for withdrawing body fluid from a body part in particular the finger pad, comprising a compression unit that can be deformed when the body part is pressed against it and increases the internal pressure in a region of the body part, and a withdrawal device. Deformation of the compression unit partially converts the primary pressing movement into a secondary movement which leads to an increase in the internal pressure in a region of the body part. The invention also comprises a system for stimulating the outflow of body fluid using a deformable compression unit.

Claims

1. System for withdrawing body fluid from a first region of a part of the body, the system comprising:

a compression unit being formed to squeeze and at least partially enclose a second region of the body part when the body part is pressed against the unit in a primary direction, the second region adjoining the first region, and to partially convert applied pressure from the body part in the primary direction into a movement of the unit in a secondary direction with a component perpendicular to the primary direction such that an internal pressure is increased in the first region of the body part,

a perforation device being formed to produce a body opening in the area of the increased internal pressure of the first region which juts out from the unit, wherein the puncture depth of the perforation device is adjustable, and

a control unit is integrated which coordinatively controls the activation of the perforation device and analytical system.

2. System for stimulating the outflow of a body fluid from a first region of a body part comprising a compression unit which partially converts a pressure applied by a second region of the body part, which adjoins the first region, in a primary direction into a movement of the unit in a secondary direction with a component at right angles to the primary direction and thus increases the internal pressure in the first region of the body part, which juts out from the unit, wherein the compression unit squeezes and at least partially encloses the second region of the body part when the body part is pressed against the compression unit.

3. System as claimed in claim 2, in which the compression unit has a U-shaped region with side parts that are formed to move towards one another when the body part is pressed against the U-shaped region.

4. System for withdrawing body fluid from a first region of a part of the body, the system comprising:

a compression unit being formed to squeeze and at least partially enclose a second region of the body part when the body part is pressed against the unit in a primary direction, the second region adjoining the first region, and to partially convert applied pressure from the body part in the primary direction into a movement of the unit in a secondary direction with a component perpendicular to the primary direction such that an internal pressure is increased in the first region of the body part, and

a perforation device being formed to produce a body opening in the area of the increased internal pressure of the first region, which juts out from the unit.

5. System as claimed in claim 4, in which the perforation device is displaceably disposed relative the compression unit.

6. System as claimed in claim 5, in which the perforation device is spring loaded.

7. System as claimed in claim 6, in which the puncture depth of the perforation device is adjustable.

8. System as claimed in claim 5, in which the puncture depth of the perforation device is adjustable.

9. System as claimed in claim 4, in which the puncture depth of the perforation device is adjustable.

10. System as claimed in claim 9, in which the analytical system contains at least one test element.

11. System as claimed in claim 4, in which an analytical system for the determination of the concentration of glucose is integrated.

12. System as claimed in claims 4, wherein the perforation device is a lancet or cannula.

13. System as claimed in claim 4, in which the compression unit has a U-shaped region with side parts that are formed to move towards one another when the body part is pressed against the U-shaped region.

14. System as claimed in claim 13, in which the compression unit is manufactured from a plastic or a rubber foam.

15. System as claimed in claim 4, in which the compression unit has a material that is deformable and has an essentially constant volume.

16. System as claimed in claim 15, further comprising a frame and the compression unit is arranged in the frame.

17. System for withdrawing body fluid from a region of a part of the body, the system comprising:

a compression unit being formed to at least partially enclose the body part when the body part is pressed against it in a primary direction and to partially convert applied pressure from the body part in the primary direction into a movement of the unit in a secondary direction with a component perpendicular to the primary direction such that an internal pressure is increased in the region of the body part, and

a perforation device being formed to produce a body opening in the area of the increased internal pressure,

in which the compression unit has a U-shaped region with side parts that are formed to move towards one another when the body part is pressed against the U-shaped region and the U-shaped region is flexible and includes ends that are connected to levers of essentially constant length.

18. System for withdrawing body fluid from a region of a part of the body, the system comprising:

a compression unit being formed to at least partially enclose the body part when the body part is pressed against it in a primary direction and to partially convert applied pressure from the body part in the primary direction into a movement of the unit in a secondary direction with a component perpendicular to the primary direction such that an internal pressure is increased in the region of the body part, and

a perforation device being formed to produce a body opening in the area of the increased internal pressure,

in which the compression unit has a U-shaped region with side parts that are formed to move towards one another when the body part is pressed against the U-shaped region and the U-shaped region is formed by two essentially inflexible half shells that are connected together via a flexible region.

19. Method for stimulating outflow of body fluid from a first region of a body part, the method comprising the steps of:

providing a compression unit,

placing the body part in the unit so that the first region juts out from the unit, and

pressing the body part against the compression unit in a primary direction, the compression unit squeezing and at least partially enclosing a second region of the body part and partially converting the primary pressing movement into a movement of the unit in a secondary direction transverse to the primary direction such that the internal pressure is increased in the first region of the body part.

20. Method of claim 19, wherein the body part is a finger pad.

21. Method as claimed in claim 19, in which the compression unit has a U-shaped region with side parts and the pressing step including pressing the body part against the U-shaped region to partially convert the primary pressing movement into movement of the side walls towards one another.