Tuohy Borst adapters (TBA) are medical devices used for the advancement of catheters or optical fibres from 0 to 6 FR while preventing the backflow of body fluids. TBAs form a leak-proof seal around the instruments making them suitable for a wide variety of interventional and diagnostic procedures.

Promepla Tuohy Borst adapter has a cylindrical shape, and the body of the adapter is manufactured from polycarbonate. The adapter is composed of 4 different components: a nut, connector, ring, and a seal. The rotating lock nut is used for tightening the seal around the catheter or optical fibre and helps to secure the device position. The elastomer seal prevents the backflow of fluid by rapidly forming a hermetic seal. The adapter has a male Luer lock connector located on the distal end and a female Luer lock on the proximal end. The adapter is available both with and without a side port, with a fixed or rotating ring, can be sterilized using gamma irradiation and are single-use devices.