JP4168231B2 - Medical mixed injection port - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical co-infusion port capable of inserting a puncture member and collecting a mixture of medicines and blood, and more particularly to a valve structure of a medical co-infusion port.
[0002]
[Prior art]
In transfusion or blood transfusion therapy, different drugs may be mixed and fluid flowing through the fluid flow path may be collected. For this reason, an infusion solution or a transfusion set having a structure in which a rubber co-injection port through which a sharp injection needle or the like can be punctured is provided in the middle of the fluid flow path. However, since such a mixed injection port punctures a sharp injection needle through a rubber stopper, there is a possibility that the stopper is scraped off at the time of puncturing and the shavings are mixed into the flow path.
[0003]
Also, in recent medical practice, there has been a concern that an accidental puncture accident at the time of use or disposal with a sharp injection needle or puncture needle is concerned. Therefore, there is known a medical mixed injection port through which a non-sharp puncture member can be punctured.
[0004]
FIG. 5 shows a conventional medical mixed injection port. 5A is an overall view of the medical mixed injection port, FIG. 5B is a cross-sectional view of the medical mixed injection port in the XX direction, and FIG. 5C is a direction perpendicular to the XX direction in the drawing. (D) is the same sectional view as (c), and shows a state in which a puncture member is inserted. FIG. 6 is a cross-sectional view in the XX direction of the conventional valve 2 of the medical co-injection port. As shown in FIGS. 5 and 6, when the puncture member 5 is inserted into a medical co-infusion port in which a single-letter slit-like opening 21 is provided in a valve made of elastic rubber or synthetic resin, the opening 21 of the valve 2 is inserted. Is a medical co-infusion port that can be opened to ensure communication and can be automatically closed by the elasticity of the valve 2 when the puncture member 5 is removed.
[0005]
However, a medical co-infusion port in which a single-letter slit-like opening 21 is provided in such a valve has an opening end 22 that is square as shown in FIGS.
Therefore, when the puncture member 5 is repeatedly inserted into or removed from the valve 2 a plurality of times or when the puncture member 5 having a slightly larger size than the shape of the opening 21 is used, the end of the opening The stress is concentrated on 22. As a result, the opening end 22 is damaged, the valve 2 is torn, and the slit-like opening 21 becomes larger than the original shape. For this reason, after the puncture member 5 has been removed, liquid leakage may occur from the tear of the opening 21, and it may be difficult to ensure an external closed system as a medical mixed injection port.
[0006]
[Problems to be solved by the invention]
The medical co-infusion port according to the present invention provides a medical co-infusion port capable of preventing the valve from being damaged against a stress load applied to the valve when the puncture member is inserted or removed.
[0007]
[Means for solving the problems]
In order to solve the above-mentioned problem, the medical mixed injection port according to the present invention is:
A valve having a slit-like opening formed in the center,
The shape of the opening located on the front side of the valve and the shape of the opening located on the back side of the valve
A one-letter slit valve;
An apparatus main body having a hollow fluid flow path and carrying the peripheral edge of the valve leaving the opening of the valve;
In the medical co-infusion port consisting of a cover that covers the peripheral edge of the valve so as to expose the opening of the valve and adheres the valve,
The opening of the valve is configured such that the width of the opening located on the back side is larger than the width of the opening located on the front side,
The opening end on the back side of the valve has a curved shape that is not angular,
The medical co-infusion port is characterized in that a shape extending from an opening end on the front side of the valve to an opening end on the back side of the valve is an arcuate curve shape toward the center of the opening .
[0008]
According to the medical co-infusion port of the present invention, the width of the opening of the valve is configured such that the width of the opening located on the back side is larger than the width of the opening located on the front side, and the opening on the back side of the valve It is a curved shape that does not have an angular end, and the shape from the opening end on the front side of the valve to the opening end on the back side of the valve is a curved shape that forms an arc toward the center of the opening The stress load on the valve, especially when the puncture member is inserted into the valve opening of the medical co-infusion port, reduces the stress load on the opening end on the back side of the valve, thus preventing the valve from being damaged. It is possible to provide a medical mixed injection port.
[0013]
In this specification, the terms “back side” and “front side” of the valve are used, but the “back side” of the valve is the side in contact with the inside of the mixed injection port, and the “front side” of the valve is the mixed injection port of the valve. It is defined as the side exposed to the outside or the side into which the puncture member of the valve is inserted.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Details of the medical co-infusion port according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram of a medical mixed injection port according to the present invention. 1A is an overall view (front view) of the medical mixed injection port, FIG. 1B is a cross-sectional view of the medical mixed injection port in the XX direction, and FIG. 1C is the XX direction in the drawing. Cross-sectional view in a vertical direction (non-puncture state), (d) is the same cross-sectional view as (c), each showing a state where a puncture member is inserted. As shown in FIG. 1, the medical co-infusion port of the present invention has a valve 2 having a slit-like opening 21 formed in the center and a hollow fluid channel 4, and the opening of the valve 2. A medical co-infusion port comprising an apparatus main body 1 that carries the peripheral edge of the valve 2 leaving 21 and a cover 3 that covers the peripheral edge of the valve 2 so as to expose the opening 21 of the valve 2 and to which the valve 2 is fixed. About a certain point, it is the same structure as the conventional medical mixed injection port shown in FIG.
[0015]
The medical co-infusion port of the present invention is closed because the opening 21 provided in the valve 2 is slit-like when the puncture member 5 is in a non-puncture state, as in the conventional medical co-infusion port, A closed system is secured by shutting off from the outside.
[0016]
In order to connect the medical co-injection port and the puncture member 5 to ensure the communication state, the puncture member 5 is first pressed against the opening 21 on the front side of the valve 3. Then, the opening 21 pressed by the distal end portion of the puncture member 5 is expanded and opened, and at the same time, the puncture member 5 is inserted into the opening 21. Thereby, the medical co-injection port and the puncture member are connected, and it becomes possible to ensure communication. At this time, since the slit-shaped opening 21 is provided in the valve, the opening 21 of the valve 2 by the puncture member 5 does not open more than necessary. Furthermore, since the repulsive force which tries to restore to the original shape is acting on the valve 2, the liquid tightness between the valve 2 and the puncture member 5 is ensured.
[0017]
When the connection operation is completed and the puncture member 5 is detached from the medical co-infusion port, the opening of the valve is released from the pressing force of the puncture member 5, so that the original state (FIG. 1 (b ) And (c)), the shape is restored. In addition, the medical co-injection port can be secured again by a closed system that is shut off from the outside.
[0018]
The present invention differs from the conventional medical co-infusion port in that the opening end 22 on the back side of the opening 21 provided in the valve 2 has an arcuate curved shape. When inserting the puncture member 5 into the opening 21 of the valve 2, the tip of the puncture member 5 is pressed against the opening 21 on the front side, and the opening 21 of the valve 2 is deformed to open. The stress load is applied from the front side direction of the valve 2.
[0019]
Further, since the opening 21 of the valve 2 has a slit shape, when the opening 21 is pushed down by the puncture member 5 and deformed, a considerable stress is applied to the opening end 22. . At this time, if the shape of the opening end 22 is an angular shape like the valve 2 of the conventional medical mixed injection port shown in FIGS. 5 and 6, this stress is concentrated on the opening end 22. End up. Since the insertion member 5 is pressed and inserted from the front side of the valve, the stress load is more conspicuous at the opening 22 at the back side of the valve than at the opening 22 at the front side of the valve.
[0020]
Therefore, in the present invention, a configuration that can absorb the deformation of the valve due to the stress load generated at the time of insertion by making the opening end on the back side of the valve with a higher stress load into a curved shape without being squared. The stress load on the end of the opening of the valve can be reduced.
[0021]
FIG. 2 is a cross-sectional view in the XX direction of the valve of the medical co-injection port according to the present invention. A slit-like opening 21 provided in the valve 2 is provided so as to penetrate the front side (A) and the back side (B) of the valve. Further, the opening end 22 on the front side (A) of the valve 2 has an angular right-angled shape, but the opening end 22 on the back side (B) of the valve 2 is arcuate toward the outside of the opening 21. It has a curved shape. With the above configuration, it is possible to reduce the stress load on the opening end 22 of the valve 2 due to the deformation of the valve 2 accompanying the insertion and removal of the puncture member.
[0022]
Another embodiment of the medical mixed injection port according to the present invention will be described. FIG. 3 is a sectional view of a valve in another embodiment of the medical co-infusion port according to the present invention. About the embodiment of the valve of the medical mixed injection port shown in FIG. 3, the slit-like opening 21 is provided so as to penetrate the front side (A) and the back side (B) of the valve 2 as in the above-described embodiment. Yes. Moreover, the shape of the opening part edge part 22 of the back side (B) of the valve 2 has comprised the curve shape which makes | forms arc shape. Furthermore, in the present embodiment, the cross-sectional shape of the opening 21 has a gentle slope from the opening end 22 on the front side (A) of the valve 2 to the opening end 22 on the back side (A). For this reason, the shape (Db) in which the width of the opening 21 on the back side is larger than the width (Da) of the opening 21 on the front side (A) of the valve 2, that is, the cross-sectional shape of the opening 21 shows a substantially trapezoid. This is desirable because stress load on the opening end on the back side of the valve can be reduced.
[0023]
At this time, the relationship (Da: Db) between the opening width (Da) on the front side (A) of the valve and the opening width (Db) on the back side (B) of the valve is from 1: 1.1. If it is in the range of 1: 3, since it becomes possible to reduce the stress load to the opening part edge part of a valve further, it is a desirable aspect.
[0024]
Further, if the width (Da, Db) of the opening 21 on the front side (A) and the back side (B) of the valve 2 is within the range of the above relationship, even by multiple stress loads due to insertion and removal of the puncture member, It has been experimentally confirmed that the valve 2 is hardly damaged and does not leak.
[0025]
FIG. 4 is a cross-sectional view of a valve in another embodiment of the medical co-infusion port according to the present invention. The embodiment of the medical co-injection valve shown in FIG. 4 has substantially the same configuration as the above-described embodiment. However, in the present embodiment, the opening end 22 on the back side (B) of the valve 2 forms an arcuate curved shape, and the opening end 22 on the front side (A) of the valve 2 also has an arcuate curved shape. There is no. Thereby, not only can the stress load on the opening end 22 on the back side (B) of the valve 2 be reduced, but also the stress load on the opening end 22 on the front side (A) of the valve 2 can be reduced. This is a desirable mode.
[0026]
In any of the above-described configurations, it is possible to reduce the stress load on the opening end portion on the back side of the valve due to insertion and removal of the puncture member, and therefore, it is possible to prevent the valve from being damaged. Play.
[0027]
In addition, about embodiment of the valve of the medical mixed injection port shown in this specification, although the shape of the opening part 21 of the valve 2 showed the embodiment of the shape of a slit-like character, this invention is only this embodiment. It is not limited to. For example, even if the shape of the opening 21 is a slit-shaped cross shape, the effect of the present invention can be achieved.
[0028]
Further, the valve 2 used in the medical co-infusion port according to the present invention is a material that is deformed when a physical force is applied, and is restored to its original shape when the force is released. Even if the opening is provided, it is preferable that the material is a material capable of ensuring a closed system that is shut off from the outside. Therefore, the valve 2 is preferably an elastic body. Moreover, since it contacts with blood, it is preferable that it does not have any negative influence on blood. Therefore, as the material of the valve 2, isoprene rubber, silicone rubber or the like is suitable. The effects of the present invention can be achieved even with synthetic rubber such as natural rubber, butyl rubber, nitrile rubber, or thermoplastic elastomer.
[0029]
【The invention's effect】
According to the medical co-infusion port of the present invention, since the end of the opening on the back side of the valve provided in the medical co-infusion port has an arcuate curved shape, the stress load on the valve, particularly the puncture member It is possible to reduce the stress load on the end of the opening on the back side of the valve that occurs when the is inserted into the opening of the valve of the medical co-infusion port.
[0030]
Also, the shape of the opening on the back side is larger than the width of the opening on the front side of the valve, that is, the cross-sectional shape of the opening is substantially trapezoidal, the width (Da) of the opening on the front side of the valve and the opening on the back side of the valve When the relationship (Da: Db) with the width (Db) of the part is in the range of 1: 1.1 to 1: 3, the effect of further reducing the stress load on the opening end on the back side of the valve can be obtained. Play.
[0031]
Furthermore, both the back side of the valve and the opening end portion on the front side have an arcuate curved shape, thereby reducing the stress load on the opening end portion on the front side of the valve.
[0032]
With the above configuration, the medical co-infusion port of the present invention can provide a medical co-infusion port capable of preventing the valve from being damaged against a stress load applied to the valve due to insertion and removal of the puncture member. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a view showing a medical co-infusion port according to the present invention. FIG. 2 is a cross-sectional view of the valve of the medical co-infusion port according to the present invention in the XX direction in FIG. FIG. 4 is a sectional view of a valve in another embodiment of the medical mixed injection port according to the present invention. FIG. 5 is a diagram showing a conventional medical mixed injection port. FIG. 6 is a cross-sectional view of a valve in a conventional medical co-infusion port.
1. 1. Device main body Valve 21. Opening 22. 2. Opening end 3 Cover 4. 4. Fluid flow path Puncture member A. Front side of valve Back side of valve Da. Width Db. Of opening on the front side of the valve Width of the opening on the back side of the valve

Claims (1)

A valve having a slit-like opening formed in the center,
The shape of the opening located on the front side of the valve and the shape of the opening located on the back side of the valve
A one-letter slit valve;
An apparatus main body having a hollow fluid flow path and carrying the peripheral edge of the valve leaving the opening of the valve;
Covering the peripheral edge of the valve so as to expose the opening of the valve, the medical co-infusion port comprising a cover for fixing the valve,
The width of the opening of the valve is configured such that the width of the opening located on the back side is larger than the width of the opening located on the front side,
The opening end on the back side of the valve has a curved shape that is not angular,
A medical co-infusion port, characterized in that a shape from an opening end on the front side of the valve to an opening end on the back side of the valve is an arcuate shape extending toward the center of the opening.

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