Indication TRANS VD Metal Needles for Extracorporeal Circulation Circuits are used on adults. They are used to relieve the left ventricle to avoid excessive pressure. Technical Characteristics Class III device. Single-use, sterilised needle. AISI 304 stainless steel needle. Tip moulded in ABS. Triple bevel at its distal end and 8 lateral perforations. Connected to the ECC circuit line. Can be supplied with a PVC tube and a preassembled ECC connector.