Traditional cervical catheters are made of Teflon and may cause thrombosis or crack if left in place for more than 48 hours. This large diameter polyurethane catheter with a needle allows the catheter to remain for up to 30 days. The EQUIVET HiFlow LongTerm (HFLT) intravenous catheter softens at body temperature. Some common problems related to catheters, such as phlebitis, can be reduced using these polyurethane catheters. Non-thrombogenic and non-cracking. They can be safely left in the vein for up to 30 days. Suture wings with holes.