Since a typical catheter insertion device is used for percutaneous insertion of a catheter into an artery or a vein located in a deep part of a tissue, it is necessary to secure a sufficient lumen for introducing the catheter while alleviating pain inflicted on the patient when the catheter insertion...http://www.google.es/patents/US4565545?utm_source=gb-gplus-sharePatente US4565545 - Catheter insertion device
