Patent ID: 8628724
Filing Date: 2014-01-14
Classification: A61B

Abstract:
1. A needle assembly for aspiration of a sample, comprising: a needle having an upper flange, a distal end, a central hollow-bore extending through at least a portion of the needle, and at least one transverse hollow-bore in fluid communication with the central bore; a differential pressure chamber having at least one port in fluid communication with the central hollow-bore of the needle; a needle guide having at least one port for passage of the needle, wherein the needle guide has an adhesive thereon and adjacent to the needle to impede horizontal and vertical movement of the needle during use; a sensor strip containing at least one reaction reagent for determining a concentration of at least one analyte in the sample, the sensor strip disposed between the differential pressure chamber and the needle guide, the sensor strip having at least one port for passage of the upper flange of the needle; a fluid filter permeable to gas but not fluids disposed between the sensor strip and the differential pressure chamber; and an analyte reaction assembly disposed between the fluid filter and the needle guide and configured to contain the sensor strip within a reaction region, the analyte reaction assembly comprising: