Saddle-contoured cap for a dermal tissue lancing device

• US 20050234488A1
• Filed: 01/28/2005
• Published: 10/20/2005
• Est. Priority Date: 04/16/2004
• Status: Abandoned Application

• Current Assignee: Lifescan Incorporated (Duv Holding Corporation)
• Original Assignee: Lifescan Incorporated (Duv Holding Corporation)
• Inventors: Allen, John
• Application Number:
  US11/045,542
• Publication Number:
  US 20050234488A1
• 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 5/150748 Having means for aiding positioning of the piercing device at a location where the body is to be pierced means for aiding positioning of devices for bringing media into the body A61M5/427, locating blood vessels A61B5/489
• CPC Class Codes: A61B 5/151 Devices specially adapted for taking samples of capillary blood, e.g. by lancets , needles or blades

Abstract

A cap for a dermal tissue lancing device that has a housing and a lancet moveable with respect to the housing includes a body with an opening therethrough for at least a portion of the lancet to pass through. The body of the cap has a proximal end configured for engagement with the housing and a distal end. Moreover, the distal end has a projection and a rim with a continuous saddle-contoured compression surface for engaging a dermal tissue target site. When the cap contacts and is urged towards the dermal tissue target site, the continuous saddle-contoured compression surface applies substantially uniform pressure against the dermal tissue target site.

Claims

1. A cap for a dermal tissue lancing device, the dermal tissue lancing device including a housing and a lancet that is moveable with respect to the housing, the cap comprising:

a body with an opening therethrough for at least a portion of a lancet to pass through, the body having

a proximal end configured for engagement with the housing; and

a distal end;

wherein the distal end includes;

a projection with a rim, the rim having a continuous saddle-contoured compression surface for engaging a dermal tissue target site, whereby, when the cap contacts and is urged towards the dermal tissue target site, the continuous saddle-contoured compression surface applies substantially uniform pressure against the dermal tissue target site.

2. The cap of claim 1, wherein the continuous saddle-countered compression surface is an elliptical continuous saddle-contoured compression surface.

3. The cap of claim 2, wherein the elliptical continuous saddle-contoured compression surface has a major axis and a minor axis and the ratio of the major axis to the minor axis is in the range of about 1.1 to 1.8.

4. The cap of claim 2, wherein the elliptical continuous saddle-contoured compression surface has a major axis and a minor axis and the major axis has a length in the range of about 10 mm to 16 mm and the minor axis has a length in the range of about 9 mm to 13 mm.

5. The cap of claim 2, wherein the projection has a height in the range of 3 mm to 5 mm.

6. The cap of claim 1, wherein the continuous saddle-contoured compression surface has a saddle height in the range of from about 0.2 mm to 0.8 mm.

7. The cap of claim 1, wherein the rim includes a lip extending into the opening.

8. The cap of claim 7, wherein the lip forms an angle alpha with a theoretical plane that is perpendicular to the opening, the angle alpha being the range of +10 degrees to −

10 degrees.

9. The cap of claim 1, wherein the cap is comprised of a rigid material selected from the group consisting of polystyrene materials, polycarbonate materials, polyester materials and combinations thereof.

10. The cap of claim 1, wherein the cap is comprised of a deformable material selected from the group consisting of elastomeric materials, polymeric materials, polyurethane materials, latex materials, silicone materials, and combinations thereof.