Abstract: An apparatus for implantation of in vivo sensors includes a housing, a dual-lumen tube extending therefrom, and an in vivo sensor received within one of the lumen of the tube. A needle is received within the other lumens of the tube, and is used to insert the tube through the skin. After implantation, the needle is removed, and the flexible tube and sensor remaining beneath the skin provides the user with reduced irritation and greater comfort. The associated method for subcutaneous implantation of a sensor for use in vivo is also disclosed.

Abstract: An improved near-infrared quantitative analysis instrument is disclosed comprising a removable finger insert which facilitates properly aligning and fitting and individual user's finger into the optical system of the analysis instrument. The finger insert according to the present invention also prevents the analysis instrument's optical system from being damaged by foreign matter typically introduced by a user's finger. The finger insert can also be provided with filters which will enable the insert to be used to as an optical standard for the analysis instrument.