Abstract: A through the needle catheter device is described which includes apparatus for threading a catheter into a blood vessel. The apparatus is irreversible during the threading process. The catheter device also includes means for irreversibly withdrawing and splitting the needle. A technique is provided for inserting the needle, threading the catheter, and withdrawing the needle from a patient.

Abstract: A through the needle catheter device is described which includes apparatus for threading a catheter into a blood vessel. The apparatus is irreversible during the threading process. The catheter device also includes means for irreversibly withdrawing and splitting the needle. A technique is provided for inserting the needle, threading the catheter, and withdrawing the needle from a patient.

Abstract: A through the needle catheter device is described in which a catheter is located inside a splittable needle for insertion into the body. Means are provided for preventing rearward motion of the catheter relative to the needle as the needle and catheter are inserted into the body. As the needle is withdrawn from the body, a splitting mechanism splits the needle, releasing the enclosed catheter. Means are provided for preventing forward motion of the needle relative to the catheter as the needle is withdrawn, thereby preventing inadvertent perforation of the catheter during withdrawal. After the needle has been withdrawn and split, the catheter assembly, including a catheter cannula, a section of extension tubing and a luer, fall away from the patient-facing side of the device. In a preferred embodiment a taping wing is provided at the proximal end of the catheter cannula.