DISPOSABLE TEST SENSOR WITH IMPROVED SAMPLING ENTRANCE

摘要

A disposable electrochemical test sensor designed to facilitate sampling of fluid samples. It has a fluid chamber having a novel extra wide sampling entrance, but no additional air escape vent. The chamber provides a reservoir from which a sample fluid can be drawn into the chamber through capillary action. The extra wide sampling entrance provided by the present invention can draw blood into the chamber through any part of the opening, thus it allows easy targeting the samples with small volume, picking up smeared samples and it is more tolerant to users who jam the tip of the sensor into users' finger.

主权项

1. An electrochemical test sensor comprising:
a base layer having a front sampling end and an electric contact end, the base layer having electrodes at the front sampling end, and electric contacts at the electric contact end; an upper layer having a front sampling end and an electric contact end; a middle layer having a front sampling end and an electric contact end, the middle layer being positioned between the base layer and the upper layer such that a portion of the electric contact end of the base layer extends beyond the electric contact end of the middle layer, the middle layer forming a cutout region at the front sampling end defined by a portion of a front edge being recessed from the middle layer front sampling end; wherein the front sampling end of the middle layer is recessed from a front edge of the upper layer front sampling end and recessed from a front edge of the base layer front sampling end, the middle layer recession defining two side openings, one on a first side of the test sensor and another on a second side of the test sensor; a fluid chamber defined on a top by the upper layer, on a bottom by the base layer, on one side by the recessed edge of the middle layer defining the cutout region, and having a sampling entrance defined by the two side openings and an open side opposite to the recessed edge of the middle layer; and wherein the two side openings are configured to allow a fluid to enter the fluid chamber through one of the two side openings when the first or second side of the test sensor is parallel to a surface that the fluid is on.