A puncture needle for an intravenous catheter and a method for manufacturing the same, and an injection device including the puncture needle

摘要

The puncture needle for intravenous injection includes a tubular body (9) suitable for housing the needle (5) of the catheter (1) and an opening suitable for fixing the connection part (3) of the catheter (1) (I) from the proximal end (11) to the tapered distal end (12) provided with a hole (13) for partially withdrawing the needle (5) to the outside is a defined length And has a peripheral wall (10) extending along the direction (L). The peripheral wall (10) has a fluid supply with a total area (At) that approximates the area of the distal hole (13) and a higher total numerical flow rate (Q_T) To define a uniform distribution of the liquid supplied along the longitudinal direction of the tubular body (9), extending substantially in the opposite longitudinal direction (e) and extending in opposite directions, respectively. 1/3 to 1/7 of the maximum diameter (ID) of the distal hole (13) at a minimum size (d) on the order of 1 mm and the overall length in the longitudinal direction is 50 At least one pair of tubes (15, 15 ') having a length greater than or equal to%.