System for withdrawing body fluid

• US 20080021494A1
• Filed: 09/24/2007
• Published: 01/24/2008
• Est. Priority Date: 05/26/2000
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Frank Deck, Gunter Schmelzeisen-Redeker, Klaus Ebert, Thomas Weiss
• Inventors: Ebert, Klaus, Weiss, Thomas, Deck, Frank, Schmelzeisen-Redeker, Guenther
• Granted Patent: US 8,523,894 B2
• Time in Patent Office: Days
• US Class Current: 606/181
• 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 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• 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 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood

Abstract

The present invention relates to a compression device for stimulating the efflux of a body fluid from a body part. The device has a compression unit with a pressure-application region made of a deformable material, the region being formed to generate a repulsive force between the body part and the compression unit. The repulsive force passes through a force maximum then decreases to serve as an indication that the body part is guided sufficiently firmly and far enough onto the compression unit.

Claims

1. A compression device for stimulating the efflux of a body fluid from a body part, the device comprising:

a compression unit having a pressure-application region made of a deformable material, the region being formed to generate a repulsive force between the body part and the compression unit, the repulsive force passing through a force maximum then decreasing to serve as an indication that the body part is guided sufficiently firmly and far enough onto the compression unit.

2. The device of claim 1 wherein the region is formed to increase the repulsive force when the body part starts to press the compression unit.

3. The device of claim 2 wherein the repulsive force decreases after passing through the force maximum.

4. The device of claim 2 wherein the compression unit includes a plate and the pressure-application region includes a lower conically tapering region widening towards the plate and an upper conically tapering region narrowing towards the plate.

5. The device of claim 4 wherein the upper and lower conically tapering regions are formed to cooperate so that the primary movement of the body part against the upper region perpendicular to the plate is at least partially converted into a transverse movement.

6. The device of claim 1 wherein the deformable material of the pressure-application region is an elastomer.

7. The device of claim 1 wherein the pressure-application region has an opening with a rim.

8. The device of claim 7 wherein the rim is in the form of a ring.

9. The device of claim 7 wherein the opening has an inner width of at least 4 mm.