The Tuohy Borst adapter (0 FR – 9 FR, 0 mm – 3 mm) can be used to fix bare fiber OXIMP sensors within the provided insertion cannula. It  prevents a backflow of the sample (blood pressure stable). The adapter consists of a Luer Lock connector (compatible with insertion cannula OXIMP500-C and OXIMP1000-C), a silicon seal and a rotating lock nut.