indewelling needle catheter vein detained needle Designed to insert in the patient's vein to give anaesthesia, medicine or other solutions for intermittent drug therapy, infusion or multiple fluid infusion.100% safe: It can be used without risk of thrombophelebitis because it is made of P.T.F.E. (Poly Tetra Fluoro Ethylene) catheter, one of the most bio-compatible materials known to man. P.T.F.E. has the lowest coefficient of friction and reduces the chances of sticking to vascular walls.The P.T.F.E. catheter, designed and made with double tapered formed tip and siliconised, offers lower resistance during insertion, resulting in less trauma to the patient, avoiding fold back.Air vented hub: The needle end is covered with a unique air vented hub (fitted on Needle hub) resulting in a higher flow rate and quick and easy confirmation of correct vascular access. It avoids blood spillage and prevents formation of air bubbles