JP4847647B2 - Connector and indwelling needle assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector used for a medical device such as an indwelling needle assembly or an intravenous needle with a wing.
[0002]
[Prior art]
Conventionally, when an infusion solution or the like is administered to a patient, a tube or the like is connected to each other via a connector to ensure a flow path. However, when it is necessary to completely remove air from the flow path, it is necessary to flow a small amount of liquid before the flow path is completed and to push air out of the flow path. In addition, there is a possibility that the liquid is leaked from the flow path and flows out to the outside world because it is difficult to remove the air. In particular, when a body fluid such as a patient's blood is used as a liquid for removing air, the spilled liquid may cause a medical accident such as infection. Therefore, it is conceivable to provide a filter with air permeability in the connector and remove air while preventing the liquid from flowing out. However, in this case, the flow rate of the liquid in the channel cannot be sufficiently secured by the filter.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a connector that ensures a sufficient liquid flow rate while providing a filter at a connection portion, and that does not generate filter fragments at this time, and a medical device using the connector.
[0004]
[Problems to be solved by the invention]
The above object is solved by the present invention described below.
[0006]
(1) The present invention provides a female connector into which a distal end portion of a male connector is inserted. The connector includes an opening into which the male connector is inserted and a fluid passage that communicates with the opening. The connector is characterized in that a hydrophobic ventilation filter that can be broken by the tip of the male connector is provided in the fluid passage.
[0007]
(2) The connector according to (1) , wherein the hydrophobic ventilation filter is made of a resin material uniaxially oriented.
[0008]
(3) The connector according to (1) or (2) , wherein the hydrophobic ventilation filter is provided perpendicular to the longitudinal axis direction of the connector.
[0009]
(4) In the present invention (1) or (2) , the hydrophobic ventilation filter has a surface perpendicular to the insertion direction of the tip of the male connector. It is a connector of description.
[0010]
(5) The present invention includes a catheter hub to which a catheter is connected and an inner needle hub to which an inner needle inserted into the catheter is connected, and a distal end portion of a male connector is inserted into the catheter hub. In the indwelling needle assembly provided with the female connector portion, the connector portion has an opening into which the male connector is inserted, and a fluid passage communicating with the opening, and the fluid passage The indwelling needle assembly is characterized in that a hydrophobic ventilation filter that can be broken by the tip of the male connector is provided therein.
[0011]
(6) The indwelling needle assembly according to (5) , wherein the hydrophobic ventilation filter is made of a resin material uniaxially oriented.
[0012]
(7) The indwelling needle assembly according to any one of (5) to (6) , wherein the hydrophobic ventilation filter is provided perpendicular to a longitudinal axis direction of the connector. is there.
[0013]
(8) In the present invention (5) to (6) , the hydrophobic ventilation filter has a surface perpendicular to the insertion direction of the tip of the male connector. An indwelling needle assembly as described.
[0014]
The breakable filter used in the present invention is a uniaxially oriented resin material, which can be obtained by a stretching method, a high draft extraction method, or the like, and particularly does not generate fragments when it breaks. Is desirable.
[0015]
In addition, the breakable filter used in the present invention preferably has air permeability because the air inside the medical device having the connector or the connector portion is pulled out by pushing it out using liquid such as blood. It is desirable to have hydrophobicity in order to prevent leakage from the connector or connector part.
[0016]
As the resin material for the filter used in the present invention, a crystalline resin can be used when the filter is obtained by a stretching method, and for example, a single layer or laminated sheet of polyolefins such as polyethylene and polypropylene can be used.
[0017]
In the present invention, by using a uniaxially oriented filter, the filter can be easily broken so as to be along the alignment direction when broken, and the occurrence of broken pieces of the filter can also be prevented.
[0018]
As a filter that can be used in the present invention, polyethylene (Ube Industries “Yupor”: UP2015), polypropylene (Ube Industries “Eupor”), specifically uniaxially oriented, breathable and hydrophobic. Polyethylene-polypropylene-polyethylene trilayer ("Upore" manufactured by Ube Industries), polypropylene-polyethylene-polypropylene trilayer ("Upore" manufactured by Ube Industries), and the like can be used.
[0019]
The position of the filter used in the present invention is not particularly limited as long as the filter is provided in a fluid passage inside the connector or the connector portion at a position where it can be broken from the opening portion by the tip of the male connector.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
An indwelling needle assembly 1 of the present invention shown in FIG. 1 was produced. The indwelling needle assembly 1 includes a catheter hub 5 to which a catheter 6 is connected, and an inner needle hub 7 to which an inner needle 8 that is inserted into the catheter 6 is connected. The connector part 2 is provided. In addition, a hemostasis valve 9 is provided on the catheter hub 5 in order to prevent blood from flowing out of the catheter 6 after the inner needle 8 is pulled out.
[0021]
The connector portion 2 includes an opening portion 4b, a fluid passage 4a communicating with the opening portion 4b and the inside of the catheter hub 5, and a uniaxially oriented hydrophobic ventilation filter 3 provided in the fluid passage 4a. The hydrophobic ventilation filter 3 is fixed by ultrasonic fusion so that the surface thereof is perpendicular to the insertion direction of the distal end portion 10 a of the male connector 10. The hydrophobic ventilation filter 3 was a polyethylene porous film (Ube Industries, Ltd. “UPOR”: UP2015).
[0022]
Hereinafter, the usage pattern of the indwelling needle assembly 1 will be described. First, the indwelling needle assembly 1 was punctured into the skin, and it was confirmed that a blood vessel was secured by a flash bag to the inner needle hub 7. Thereafter, when the inner needle 8 and the inner needle hub 7 were pulled out, blood from the blood vessel was filled into the catheter hub 5 via the catheter 6. At this time, the air remaining in the catheter hub 5 escapes from the hydrophobic ventilation filter 3 so as to be pushed out by the blood, and blood does not leak from the hydrophobic ventilation filter 3 even if the inside of the catheter hub 5 is filled with blood. There wasn't.
[0023]
Next, the distal end portion 11 of the male connector 10 of the infusion set (Telfusion infusion set: TS-A350PK027 (manufactured by Terumo Corporation)) filled (primed) with physiological saline is hydrophobicized on the connector 2. The liquid-permeable filter 3 was liquid-tightly connected while being broken. The state is shown in FIG. 2 (however, blood is omitted in FIG. 2). At this time, the hydrophobic ventilation filter 3 was easily broken along the orientation direction, and no fragments were generated.
[0024]
As another embodiment of the connector of the present invention, a winged intravenous injection needle 20 as shown in FIG. 3 was produced. The winged intravenous injection needle 20 has a connector 23 connected to a tube 22 extending from a base end portion of a winged hub 21 of a normal winged intravenous needle, and the indwelling needle assembly described above is included in the connector 23. A hydrophobic ventilation filter 24 similar to the hydrophobic ventilation filter 3 of No. 1 was provided.
[0025]
When an infusion set filled with a physiological saline solution (primed) was connected to the winged intravenous needle 20 in the same manner as the indwelling needle assembly 1 described above, the hydrophobic aeration filter was obtained. Was easily broken along the orientation direction, and no fragments were generated.
[0026]
【The invention's effect】
Since the connector of the present invention has a breakable hydrophobic ventilation filter, when administering an infusion solution or the like to a patient, when connecting a tube or the like through the connector to secure a flow path, a liquid such as blood is used. The air in the flow path can be removed while preventing leakage of the liquid, and the flow rate of the liquid in the flow path can be sufficiently secured because the hydrophobic ventilation filter is broken.
[0027]
Further, by using a uniaxially oriented resin material by a stretching method, a high draft extraction method, or the like as the hydrophobic ventilation filter, it is possible to prevent generation of fragments of the hydrophobic filter at the time of breakage.
[0028]
Therefore, the connector of the present invention can provide a connector that can be safely operated and used without the risk of blockage of the flow path due to infection such as blood or fragments of the hydrophobic ventilation filter, and a medical device using the connector.
[0029]
The connector of the present invention is effectively used for a female connector into which a distal end portion of a male connector is inserted, an indwelling needle assembly having a similar connector portion, a winged intravenous needle, a multiway stopcock such as a three-way stopcock, etc. can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an indwelling needle assembly 1 according to the present invention.
FIG. 2 is a cross-sectional view showing a use state of the indwelling needle assembly 1 according to the present invention.
FIG. 3 is a cross-sectional view of a winged intravenous needle 20 according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Indwelling needle assembly 2 Connector part 3 Uniaxially oriented hydrophobic ventilation filter 4a Fluid passage 4b Opening part 5 Catheter hub 6 Catheter 7 Inner needle hub 8 Inner needle 9 Hemostatic valve 10 Male connector 11 Tip part 20 of male connector Injected needle 21 with wings Hub 22 with wings 22 Tube 23 Connector 24 Uniaxially oriented hydrophobic ventilation filter

Claims (4)

In the female connector into which the tip of the male connector is inserted,
The connector has an opening into which the male connector is inserted, and a fluid passage communicating with the opening,
A connector characterized in that a hydrophobic ventilation filter that can be broken by the tip of the male connector is provided in the fluid passage. The connector according to claim 1 , wherein the hydrophobic ventilation filter is made of a resin material uniaxially oriented. A catheter hub to which a catheter is connected and an inner needle hub to which an inner needle inserted into the catheter is connected. A female connector portion into which a distal end portion of a male connector is inserted into the catheter hub. In the indwelling needle assembly provided with
The connector portion has an opening into which the male connector is inserted, and a fluid passage communicating with the opening,
In the indwelling needle assembly, a hydrophobic ventilation filter that can be broken by a distal end portion of the male connector is provided in the fluid passage. The indwelling needle assembly according to claim 3 , wherein the hydrophobic ventilation filter is made of a resin material uniaxially oriented.

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