The Tuohy Borst adapter (0 FR – 9 FR, 0 mm – 3 mm) can be used to fix insertable minipobes with fiber diameter of 250µm, 500µm or 1000µm 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 IMP500-C and IMP1000-C), a silicon seal and a rotating lock nut.