JPH0666682U - Needle - Google Patents

Abstract

(57) [Summary] [Purpose] When a solvent is injected with a syringe to dissolve the injectable solution in a sealed vial, the pressure applied to the piston of the syringe does not increase and the solvent is easily removed. To provide a structure of an injection needle that can be injected into. [Structure] Needle tube 1 and needle base 2 supporting a base end of the needle tube
Consists of. Horizontal holes 3 and 4 are bored in the upper and lower portions of the needle tube 1 or in the needle base 2 and the lower portion of the needle tube 1, respectively. These lateral holes are communicated with each other by a ventilation pipe 5 attached to the inner wall of the needle tube 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an injection needle, and more particularly, to a structure of an injection needle suitable for dissolving a soluble injection when used.

[0002]

[Prior art]

 The injectable solution type injection is usually stored in a dry state in a vial bottle sealed with a rubber stopper. In order to use this injectable solution as an injectable solution, it is necessary to dissolve the dry-use injectable preparation before use in a solvent. For this reason, the method of inserting the injection needle from the rubber stopper of the vial and injecting the solvent into the vial with a syringe is usually used.

However, since the vial is in a hermetically sealed state, the pressure inside the vial increases as the solvent is injected, and it is necessary to gradually increase the force applied to the piston of the syringe. This tendency becomes even greater as the space inside the container decreases.

For this reason, the solvent cannot be injected promptly, a large force may be applied to the finger pushing the piston, and liquid may leak from the connecting portion between the injection needle and the injection container, which is an unexpected situation. There is a problem that causes.

[0005]

[Problems to be solved by the device]

 The purpose of the present invention is to easily inject the solvent without injecting the high pressure on the piston of the syringe when injecting the solvent with the syringe to dissolve the injectable solution for injection in the sealed vial. It is to provide a structure of an injection needle capable of.

[0006]

[Means for Solving the Problems]

 The injection needle of the present invention is an injection needle comprising a needle tube and a needle base portion supporting a proximal end portion of the needle tube, wherein a lateral hole is bored in an upper portion and a lower portion of the needle tube, or in the needle base portion and the lower portion of the needle tube. Moreover, these lateral holes communicate with each other by a ventilation pipe attached to the inner wall of the needle pipe.

In the present invention, if the lateral hole in the lower portion of the needle tube is formed in a position such that it is inside the vial when the injection needle is inserted into the rubber stopper of the vial, the perforation position is the same. However, it may be near the center or above the center.

[0008]

【Example】

 An embodiment of the present invention will be specifically described with reference to the drawings.

Embodiment 1 FIG. 1 is a sectional view showing an embodiment of the injection needle of the present invention, and FIG. 2 is an enlarged sectional view taken along line II-II of FIG. A needle base 2 that supports the needle tube 1 is provided at the base end of the needle tube 1. A lateral hole 3 is drilled in the lower portion of the needle tube 1, and a lateral hole 4 is drilled in the upper portion of the needle tube 1. The horizontal hole 3 and the horizontal hole 4 are connected by a ventilation pipe 5.

Embodiment 2 FIG. 3 is a sectional view showing another embodiment of the syringe of the present invention. In this embodiment, a lateral hole 3 is drilled in the lower portion of the needle tube 1 and a lateral hole 7 is drilled in the needle base 2. The horizontal hole 3 and the horizontal hole 7 are connected by a ventilation pipe 5. The cross-sectional view of the needle tube 1 is similar to the shape shown in FIG.

In the case of using the injection needle of this embodiment, the lateral hole 7 is always located outside the vial even when the needle tube 1 is inserted to the proximal end, so that the needle tube should be inserted properly. You don't have to.

[0012]

[Operation] FIG. 4 is a cross-sectional view showing an example of a state of use when a solvent is injected into a vial bottle containing a soluble injection preparation at the time of use, using the syringe using the injection needle of Example 1. It is an explanatory diagram. The solvent 20 is injected from the tip of the needle tube 1 inserted into the vial 10 sealed with the rubber stopper 11 and the cap 12. The gas in the space portion of the vial, which decreases along with it, flows into the ventilation pipe 5 through the lateral hole 3, passes through the ventilation pipe 5, and is discharged into the atmosphere through the lateral hole 4.

Therefore, the pressure in the vial does not increase as in the case of using a conventional injection needle, and the vial is always maintained at about atmospheric pressure. Therefore, unlike the conventional case, it is not necessary to gradually increase the force applied to the piston, and the solvent can be injected very easily.

[0014]

[Effect of device]

 Since the injection needle of the present invention has a mechanism capable of discharging the gas in the vial to the outside, when the solvent that dissolves the injectable solution at the time of injection is injected into the vial, the pressure inside the vial is reduced. Does not get pressurized. Therefore, the injection of the solvent can be performed very easily.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the injection needle of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view showing another embodiment of the injection needle of the present invention.

FIG. 4 is a cross-sectional explanatory view showing an example of a usage state of the injection needle of the present invention.

[Explanation of symbols]

 1 Needle pipe 2 Needle base 3,4 Horizontal hole 5 Vent pipe 6 Vent pipe side wall 7 Horizontal hole 8 Piston 9 Syringe container 10 Vial bottle 11 Rubber stopper 12 Cap 20 Solvent

Claims (2)

[Scope of utility model registration request] 1. An injection needle comprising a needle tube and a needle base portion supporting a base end portion of the needle tube, wherein lateral holes are bored in an upper portion and a lower portion of the needle tube, and these lateral holes are attached to an inner wall of the needle tube. An injection needle characterized by being communicated with each other by a vent pipe. 2. An injection needle comprising a needle tube and a needle base portion supporting a base end portion of the needle tube, wherein lateral holes are bored in the needle base portion and a lower portion of the needle tube, and these lateral holes are formed on the inner wall of the needle tube. An injection needle characterized by communicating with a ventilation tube attached to the.