Lancet device having capillary action

• US 7,803,123 B2
• Filed: 04/30/2004
• Issued: 09/28/2010
• Est. Priority Date: 01/22/2001
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Roe, Steven N., Perez, Edward P.
• Primary Examiner(s): Hindenburg; Max
• Assistant Examiner(s): Eiseman; Adam J
• Application Number:
  US10/838,156
• Publication Number:
  US 20050004494A1
• Time in Patent Office: 2,342 Days
• Field of Search: 205/777.5, 600/573, 600/579, 600/581, 600/583
• US Class Current: 600/583
• CPC Class Codes: A61B 2010/008 Interstitial fluid
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
• CPC Class Codes: A61B 5/14514 using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150419 comprising means for capillary action
• CPC Class Codes: A61B 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/15087 short range, e.g. between console and disposable using implanted devices A61B5/150877
• 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 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood
• CPC Class Codes: G01N 35/1079 with means for piercing stoppers or septums

Abstract

A device for sampling body fluid, the device comprising, a main body, a lancet disposed within the main body, a carrier disposed within the main body fixedly attached to the lancet, a biasing means in communication with the lancet and the carrier, an annular space disposed within the main body adjacent the lancet, and a means for measuring a body fluid. Wherein the means for measuring the body fluid may include micro-porous test strips, an electronic testing device, an optical/reflectance testing measuring device, or a visual inspection.

Claims

1. A device for sampling body fluid, comprising:

a main body defining a capillary channel;

a lancet disposed within the capillary channel, the lancet having a proximal end and a distal tip, the lancet having a groove disposed axially along the lancet from the proximal end to the distal tip, the lancet and the main body defining an annular space dimensioned to draw fluid via capillary action; and

a testing element in communication with the annular space, wherein the testing element is disposed within the groove of the lancet.

2. The device of claim 1, wherein the testing element includes a test strip disposed within the groove of the lancet.

3. The device of claim 1, wherein the testing element includes a reactive coating deposited in the groove of the lancet.

4. The device of claim 1, wherein the groove has a v-shaped geometry.

5. The device of claim 1, further comprising:

a spring received in the capillary channel, the spring being biased to retract the lancet; and

a spring retainer extending in the capillary channel against which the spring is biased.