JP4066222B2 - Connector with automatic opening / closing valve and medical device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a male connector used by being connected to a female connector.
[0002]
The present invention relates to such a connector, and more particularly to a connector with an automatic opening / closing valve that is used by being incorporated in a catheter, an infusion set, a transfusion set, an artificial lung circuit, a dialysis circuit, or the like.
[0003]
[Prior art]
Conventionally, in medical practice, drugs and the like are injected by connecting a female connector installed at the proximal end of an injection needle or extension tube to a male connector installed at the distal end of an infusion set or blood transfusion set. Or sucking. When performing such operations, it is necessary to pay close attention to prevent medicines from flowing out of the male connector and air from flowing in before the connection. If this precaution is insufficient, there is a possibility that the drug or the like is insufficient or the air is contaminated by bacteria.
[0004]
In addition, when a drug or the like is administered through a male connector such as an infusion set or a blood transfusion set, the infusion set or the blood transfusion set or the like is filled with the drug or the like, and then temporarily stored and administered in an important manner.
[0005]
In such a case, the male connector must be recapped to prevent inflow of air. Furthermore, in an infusion set, a transfusion set, or the like, there is a possibility that a drug or the like may flow out from the tip of the male connector due to forgetting to close or loosening the clamp.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to prevent outflow of medicine and air from the male connector when it is necessary to connect a male connector and a female connector provided in each medical device during injection or suction operation of the medicine or the like. To provide a connector with an automatic on-off valve.
[0007]
[Means for Solving the Problems]
The aforementioned problems can be solved by the following.
[0008]
(1) A male connector used by being connected to a female connector of a medical tube, wherein the male connector includes a connector main body having a fluid flow path therein, a connecting portion of a female connector at a distal end portion, and a proximal end portion And a valve body that normally shuts off the flow path at the distal end of the male connector, and the valve body is automatically connected to the female connector. The valve body is made of an elastic body having a restoring force, and the outer periphery of the valve body is larger than the minimum outer periphery of the distal end portion of the male connector, and the maximum connection portion of the female connector is provided. The outer periphery of the valve body is smaller than the inner diameter, and a plurality of protrusions are provided on the axis of the slit, and the outer periphery of the valve body is the inner wall of the female connector when fitted to the female connector. Contacting, by the equal force is applied to the protrusion, the slit connector with automatic on-off valve, characterized by deformed so as to open into the axis perpendicular direction.
[0009]
(2) A medical device in which a female connector is connected to a proximal end portion of the connector with an automatic opening / closing valve according to (1).
[0010]
(3) A medical device in which an infusion set or a blood transfusion set is connected to a proximal end portion of the connector with an automatic opening / closing valve according to (1) to (2).
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The connector with an automatic opening / closing valve of the present invention is usually used for needles, extension tubes, catheters, multi-way stopcocks, etc., and can be connected to a female connector having one end connected to a tube such as a needle or catheter and the other end having a connecting portion. The male connector has a simple lure shape. When connecting the automatic open / close valve connector of the present invention to these female connectors, the valve body provided in the automatic open / close valve connector of the present invention automatically opens to open the fluid passage, and when removed from the female connector, The valve body is automatically closed and the fluid passage is blocked.
[0017]
The automatic open / close valve-equipped connector of the present invention will be described below in detail with reference to the drawings.
[0018]
FIG. 1 is a front view of a connector 1 with an automatic opening / closing valve of the present invention. 2 is an axial sectional view of the connector 1 with an automatic opening / closing valve taken along the line AA in FIG. 1, and FIG. 3 is an axial sectional view of the connector 1 with an automatic opening / closing valve taken along the line BB in FIG.
[0019]
The automatic open / close valve-equipped connector 1 includes a male connector body 2 having a connection portion with a female connector, and a valve body 3 at the distal end of the male connector body 2 in the direction of connection to the female connector.
[0020]
One end of the male connector main body 2 is provided with a connecting portion that connects to the female connector, and the other end is provided with a proximal end portion that connects the medical tube. A female connector, an infusion set, and a medical tube of a transfusion set can be connected to the base end portion.
[0021]
FIG. 4 is a front view of the valve body 3 attached to the connector 1 with the automatic opening / closing valve of the present invention. As shown in FIG. 4, the valve body 3 is provided with a slit 5 for opening and closing the flow path. At least a part of the outer periphery of the valve body 3 is set to come into contact with the inner wall of the female connector when the connector 1 with the automatic opening / closing valve is fitted to the female connector.
[0022]
And the valve body 3 is good also as a structure which provided the projection part 6 which protrudes in an outer peripheral direction. The protrusion 6 functions if there is one, but preferably two or more are provided. Although the details will be described later, the opening and closing of the slit 5 is efficiently performed.
[0023]
The material used for the connector body 2 is not particularly limited, but is preferably made of a relatively hard synthetic resin such as polypropylene or polycarbonate.
[0024]
The material of the valve body 3 is not particularly limited, but is preferably an elastic material, and more preferably a rubber material such as silicone rubber having a restoring force.
[0025]
Next, the operation will be described.
[0026]
FIG. 5 is a cross-sectional view of the connector 1 with an automatic opening / closing valve of the present invention and a female connector 11 having a needle portion 12 at the tip before connection, and FIG. 6 shows the state after connection of FIG.
[0027]
As shown in FIG. 5, the inner diameter of the female connector 11 has a shape that gradually decreases toward the needle portion 12.
[0028]
In the connector 1 with the automatic opening / closing valve before connection, the slit 5 of the valve body 3 is closed. There is no problem even if the maximum outer diameter L1 (see FIG. 4) of the valve body is set slightly larger than the maximum inner diameter L2 of the connection portion of the female connector 11, but the connection is established by setting it slightly smaller than the inner diameter L2. Smooth.
[0029]
In order to connect the automatic open / close valve connector 1 to the female connector 11 in this state, when the automatic open / close valve connector 1 is pushed toward the connecting portion of the female connector 11, it passes through the maximum inner diameter L2 of the female connector 11. The protrusion 6 of the valve body 3 starts to contact the inner wall 13 of the female connector 11 due to the gradually decreasing inner diameter. When the automatic open / close valve-equipped connector 1 is further pushed forward, the protruding portion 6 gradually decreases in the direction of the needle portion 12 in the protruding portion 6. Shrink until equal or slightly smaller. Thereby, the closed slit 5 is deformed so as to open.
[0030]
Furthermore, when two or more protrusions 6 are installed on the axis of the slit 5 as shown in FIGS. 1 and 4, force is applied equally to each protrusion 6, and the protrusions 6 are provided on the valve body 3. The slit 5 is deformed so as to open in a direction perpendicular to the axis of the slit 5, and the slit 5 is easily opened. As a result, the blocked flow path is opened.
[0031]
By providing two or more protrusions 6 in this way, at least a part of the outer periphery of the valve body 3 as described above is formed in the slit 5 more than when it is set to contact the inner wall 13 of the female connector 11. Opening and closing efficiency is improved.
[0032]
Further, the valve body 3 may be configured such that only the protrusions 6 provided at two or more locations on the axis line are in contact with the inner wall 13 of the female connector 11. With this configuration, when the slit 5 is deformed so as to open in the direction perpendicular to the axis as described above, the outer peripheral portion of the valve body 3 similarly expands in the outer peripheral direction perpendicular to the axis of the slit 5. When deformed to do so, a space can be secured when the diameter is expanded and deformed.
[0033]
Further, when the automatic open / close valve-equipped connector 1 and the female connector 11 are pulled apart to release the connection, the opened slit 5 causes the inner wall 13 to cease to be pressed against the valve body 3, and at the same time, It is closed by its resilience.
[0034]
As described above, according to the automatic open / close valve-equipped connector 1 of the present invention, when connected to the female connector 11, the slit 5 of the valve body 3 is automatically opened, and when the connection is released, the slit 5 is automatically opened. Closed.
[0035]
(Embodiment)
Next, the connector with an automatic opening / closing valve of the embodiment will be described.
[0036]
FIG. 7 is a cross-sectional view in the axial direction when a tube of an infusion set is connected to the proximal end portion of the connector with an automatic opening / closing valve of the present invention.
[0037]
In the connector 21 with the automatic opening / closing valve of the embodiment, the male connector body 22 is made of polypropylene as a material. The valve body 23 is provided with a slit 25 penetrating the valve body 23 at the center, and further provided with two protrusions 26 on the outer periphery of the valve body 23. The two protrusions 26 are arranged one by one so as to face the axis of the slit 25. The valve body 23 was made of silicone rubber as a material, and was bonded and fixed near the tip of the male connector body 22. The male connector 21 produced in this way was attached to the tube 27 at the patient-side tip of a Terumo infusion set (not shown).
[0038]
The luer part 24 of the connector main body 22 was produced according to the ISO standard, and the valve body had a maximum outer circumference including the protrusions set to 4.0 mm. The length of the slit 25 of the valve body 23 was set to 1 mm, and the diameter was about 0.6 mm when opened. The thickness of the valve body 23 was 1.5 mm in the outer peripheral direction and 0.7 mm in the center.
[0039]
Place 2000 ml of physiological saline in an IVH bag made by Terumo, attach it to the stand, connect the bottle needle of the infusion set to which this male connector 21 is attached to the infusion bag, and set the drop from the bottle needle to the tip of the male connector 21 to 130 cm. Set to.
[0040]
In this state, the male connector 21 was connected to a female connector portion of a 23G Terumo needle, and the infusion set was adjusted at a flow rate of 80 ml / h. At this time, the valve body 23 is deformed so that the inner surface of the female connector portion of the needle applies a force to the projection portion 26 and is compressed from the outer peripheral direction on the axis of the slit 25, thereby being provided on the valve body 23. The slit 25 is deformed so as to open in a direction perpendicular to the axis of the slit 25, and from a closed state to an open state through which fluid can pass.
[0041]
This state was left for 24 hours. As a result, the remaining liquid amount in the infusion bag after 24 hours was 110 ml.
[0042]
Next, 2000 ml of physiological saline solution is put into an IVH bag made by Terumo, and this is attached to a stand, and the bottle needle of the infusion set to which this male connector 21 is attached is connected to the infusion bag, and from the bottle needle to the tip of the male connector 21 The head was set to 130 cm. In this state, the male connector 21 was connected to a 23G Terumo needle female connector, and the infusion set was adjusted to a flow rate of 80 ml / h, then the needle was removed and left for 24 hours. Liquid leakage from the tip of the male connector 21 was not observed.
[0043]
Accordingly, the flow rate and accuracy can be ensured in the same manner as in a normal infusion set, and fluid does not pass through the valve body unless connected to the female connector.
[0044]
【The invention's effect】
It has become possible to prevent contamination of bacteria and the like due to inflow of air, and to prevent outflow of drugs and the like from the tip of the male connector by forgetting to close or loosening the clamp in an infusion set or the like.
[0045]
[Brief description of the drawings]
FIG. 1 is a front view of a connector according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG. 1. FIG.
FIG. 4 is a front view of a valve body used in the connector of the present invention.
FIG. 5 is an axial cross-sectional view before the connection of the connector and the female connector of the present invention.
FIG. 6 is a cross-sectional view in the axial direction after connection of the connector of the present invention and a female connector.
FIG. 7 is an axial sectional view of the connector according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connector 2 Male connector main body 3 Valve body 5 Slit 6 Protrusion part 11 Female connector 12 Needle part 13 Inner wall 21 Connector 22 Male connector main body 23 Valve body 25 Slit 26 Protrusion part 27 Tube

Claims (3)

A male connector used by connecting to a female connector of a medical tube, wherein the male connector includes a connector body having a fluid flow path therein, a female connector connection portion at a distal end portion, and a tube at a proximal end portion. And a valve body that normally cuts off the flow path at the tip of the male connector, and the valve body automatically opens the flow path when fitted to the female connector. Having a slit to perform,
The valve body is made of an elastic body having a restoring force,
The outer periphery of the valve body is larger than the minimum outer periphery of the distal end portion of the male connector, smaller than the maximum inner diameter of the connection portion of the female connector, and the outer periphery of the valve body has a plurality of protrusions provided on the axis of the slit. And
When the outer periphery of the valve body contacts the inner wall of the female connector when fitted to the female connector, the slit is opened in a direction perpendicular to the axis thereof by applying an even force to the protrusion. A connector with an automatic on-off valve , characterized by deformation . The medical device by which the female connector is connected to the base end part of the said connector with an automatic on-off valve of Claim 1 . A medical device in which an infusion set or a blood transfusion set is connected to a base end portion of the connector with an automatic opening / closing valve according to claim 1.

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