Disposable skin perforator and blood testing device
First Claim
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1. A skin perforator for obtaining a sample of blood by puncturing the skin comprising:
- a) a pressure plate containing an aperture formed therein wherein said pressure plate is placed adjacent to and surrounding the area of skin to be punctured;
b) a cover plate having a resilient convex panel formed therein, said cover plate being attached to said pressure plate and said convex panel having a point penetrating barb formed integrally therefrom and directed inward toward said aperture in said pressure plate, said integrally formed barb resulting in an aperture formed in said convex panel, wherein a first and second pressure are applied the convex panel and directed toward said pressure plate, said second pressure being greater than said first pressure so that said convex panel has a resistance to said first pressure and as said first pressure is increased toward said second pressure, said pressure overcomes the resistance of said convex panel and said convex panel collapses rapidly to cause said barb to suddenly and rapidly penetrate the skin causing a puncture, said convex panel resiliently returning to its original convex shape upon removal of said pressure thereby withdrawing the barb from the skin, and(c) a means for limiting said barb to a single penetration of the skin wherein said limiting means automatically occludes the aperture of said pressure plate following the initial penetration.
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Abstract
A device that pierces the skin due to the collapsing of dome between the fingertips. Immediately after a puncture is made, a blood or exudate sample can be collected on an absorbent test strip laminated on the pressure plate. Flow enhancement of blood or exudate from the puncture site is achieved by maintenance of pressure around the site and on the imparting of a vacuum within the device. A shutter device incorporated into the skin perforator prevents repeated use of the device.
398 Citations
22 Claims
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1. A skin perforator for obtaining a sample of blood by puncturing the skin comprising:
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a) a pressure plate containing an aperture formed therein wherein said pressure plate is placed adjacent to and surrounding the area of skin to be punctured; b) a cover plate having a resilient convex panel formed therein, said cover plate being attached to said pressure plate and said convex panel having a point penetrating barb formed integrally therefrom and directed inward toward said aperture in said pressure plate, said integrally formed barb resulting in an aperture formed in said convex panel, wherein a first and second pressure are applied the convex panel and directed toward said pressure plate, said second pressure being greater than said first pressure so that said convex panel has a resistance to said first pressure and as said first pressure is increased toward said second pressure, said pressure overcomes the resistance of said convex panel and said convex panel collapses rapidly to cause said barb to suddenly and rapidly penetrate the skin causing a puncture, said convex panel resiliently returning to its original convex shape upon removal of said pressure thereby withdrawing the barb from the skin, and (c) a means for limiting said barb to a single penetration of the skin wherein said limiting means automatically occludes the aperture of said pressure plate following the initial penetration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A skin perforator for puncturing the skin, said perforator of the type comprising a housing having a contact surface for placement adjacent to the skin to be punctured, an aperture in said contact surface, a puncturing member operatively mounted within said housing for movement towards and through said aperture, wherein the improvement comprises:
a limiting means for automatically occluding the aperture of said skin perforator following initial puncture of the skin. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification