Lancet having capillary channel and sterile protection element and method for producing such a lancet
View Patent ↗Lancets comprising a piercing element for puncturing the skin of a patient, a test region containing detection reagents for determining an analyte concentration of a body fluid sample, a capillary structure arranged in the piercing element for transporting a body fluid sample to the test region, and a sterile protection element, which encloses the tip of the piercing element. The capillary structure is blocked in a section surrounded by the sterile protection element. Also provided are methods for producing a lancet, comprising: producing a piercing element, which on the upper side has an upwardly open capillary structure; covering a section of the upper side of the piercing element and blocking the capillary channel in this section using a first material; covering a section of the underside using a second material; sterilizing the piercing element; and attaching a test region containing detection reagents to the piercing element.
1. A lancet, comprising:
a piercing element for puncturing the skin of a patient;
a test region containing detection reagents for determining an analyte concentration of a body fluid sample;
a capillary channel arranged in the piercing element for transporting a body fluid sample to the test region, wherein the capillary channel is a groove or a continuous slot; and
a sterile protection element, which encloses the tip of the piercing element, the sterile protection element comprising a first component covering a section of an upper side of the piercing element and filling in the capillary channel in the covered section, and a second component covering a section of an underside of the piercing element; wherein the capillary channel is blocked in a section surrounded by the sterile protection element.
2. The lancet according to claim 1 , wherein the capillary channel is blocked by the sterile protection element filling in the capillary channel at least over a part of the length.
3. The lancet according to claim 2 , further comprising a carrier body fastened to the piercing element, wherein the carrier body protrudes from the sterile protection element.
4. The lancet according to claim 3 , further comprising a film glued to both:
(1) the side the first component facing away from the piercing element; and (2) a part of the carrier body that protrudes from the sterile protection element.
5. The lancet according to claim 1 , wherein at least one of the two components is a film.
6. The lancet according to claim 1 , wherein the first component is porous.
7. The lancet according to claim 6 , wherein the first component is a polymer foam.
8. The lancet according to claim 1 , wherein a film is glued to the side the first component facing away from the piercing element.
9. The lancet according to claim 8 , further comprising a carrier body fastened to the piercing element, wherein the film glued to the first component is also glued to a part of the carrier body that protrudes from the sterile protection element.
10. The lancet according to claim 1 , wherein the first component is thicker than the second component.
11. The lancet according to claim 10 , wherein the first component is at least ten times as thick as the second component.
12. The lancet according to claim 1 , wherein the piercing element is fastened to a carrier body, which carries the test region.
13. A carrier strip comprising a plurality of lancets according to claim 1 , arranged thereon.