JPS58147539U - Venting needle for infusion - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing how a conventional infusion vent needle is used;
Figure 2 is the same (an explanatory diagram showing the backflow phenomenon of the infusion fluid that has flowed into the ventilation needle, and Figure 3 is a cross-sectional view showing one embodiment of the ventilation needle for infusion according to this invention. 11...・Ventilation needle body, 12...needle part,
13... Trunk, 13a... Base, 13
b...Outside air inlet, 15...Air filter, 16...ring-shaped substrate, 17...
Rising base, 18...Rising partition, 18a.
... Circumferential side, 19 ... Ventilation hole.

Claims (1)

[Scope of utility model registration request] In a ventilation needle consisting of a cylindrical body part in which a needle part is inserted and fixed at one end base and an air filter is provided at the open end of the outside air inlet at the other end, on the inner surface side of the air filter facing inside the body part, A ring-shaped substrate having a raised base protruding from its inner periphery is disposed, and a raised base made of a thin elastic material is provided on the inner surface side of the ring-shaped substrate with a ventilation hole opened on the peripheral side at a position corresponding to the raised base. It has a structure in which a septum body is provided, and the circumferential side of the septum body is elastically deformed by the inflowing infusion that occurs when the needle punctures the infusion solution enclosure, so that the ventilation hole can be tightly closed at the base of the stand. A ventilation needle for infusions featuring: