JP2017012261A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical connector capable of effectively protecting a needle tip and performing priming.SOLUTION: A medical connector includes: a hub 101 having a first passage 111 penetrating in an axial direction; a hollow needle 102 fixed to the hub 101 so as to communicate with the first passage 111; and a sleeve 103 for covering the needle 102 and forming a watertight space 131 with the front end surface of the hub 101. The hub 101 includes: a second passage 112 where a first end is opened to the watertight space 131 and a second end is opened to the outside of the watertight space 131; and a filter 113 arranged at the second end of the second passage 112 and allowing gas to permeate.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to medical connectors, and more particularly to connectors that can be used in closed infusion systems.

  In the infusion system, a sub-path for co-injecting other fluids such as infusion and liquid medicine is connected to a main path for injecting the infusion into a patient's body, if necessary. The connection between the main route and the sub route is performed by connecting a port provided on the main route and a connector provided at the end of the sub route.

  A general port is sealed with an elastic body such as rubber, and the connector has a needle or the like that can penetrate the elastic body. The main path and the sub path can be connected by puncturing the elastic body of the port with the needle of the connector.

  In recent years, strengthening of countermeasures such as prevention of infection and prevention of erroneous puncture at the time of infusion has been demanded. For this reason, a connector in which the needle tip is protected by a hood has been studied (for example, see Patent Document 1).

JP 2010-233893 A

  However, providing a hood makes it difficult for a finger or the like to touch the needle tip, but the effect of the hood having a large opening is limited. In order to more effectively protect the needle tip, it is conceivable to provide a cap or the like that completely covers the needle. However, the removal of the cap is not only troublesome but also causes erroneous puncture. It is also conceivable to provide an elastic sleeve or the like that can be punctured without being removed. However, if a sleeve or the like that completely covers the needle is provided, there is a problem that priming becomes difficult.

  An object of the present disclosure is to realize a medical connector that can effectively protect a needle tip and can be easily primed.

  One aspect of the medical connector includes a hub having a first passage extending in the axial direction, a hollow needle fixed to the hub so as to communicate with the first passage, and a front end surface of the hub that covers the needle. A hub for forming a watertight space, and the hub has a second passage having a first end opened in the watertight space, a second end opened outside the watertight space, and a second end of the second passage. And a filter that allows gas to pass therethrough.

  In one aspect of the medical connector, the medical connector may further include an annular hood attached to the hub and surrounding the needle.

  In one aspect of the medical connector, the hub has an outer cylinder and an inner cylinder inserted into the outer cylinder, the filter has a cylindrical shape inserted between the outer cylinder and the inner cylinder, and the second passage is A first space provided between the inner wall of the inner cylinder and the needle, and a second space provided between the inner cylinder and the outer cylinder so as to communicate with the first groove and reaching the filter. It is good also as the structure currently formed.

  According to the connector of the present disclosure, the needle tip can be effectively protected and priming can be easily performed.

It is sectional drawing which shows the connector which concerns on one Embodiment. It is sectional drawing which shows the example of the port which can connect a connector. It is sectional drawing which shows the modification of a connector.

  In the present disclosure, the side that becomes the patient side when using the medical connector is described as a front end, and the opposite side is described as a rear end.

  As shown in FIG. 1, the medical connector 100 of the present embodiment includes a hub 101 having a first passage 111 penetrating in the axial direction, and a needle 102 fixed to the hub 101 so as to communicate with the first passage 111. And a sleeve 103 that covers the needle 102 and forms a watertight space 131 with the hub 101. The hub 101 is provided on the second end side of the second passage 112 and the second passage 112 having a first end opening in the water-tight space 131 and a second end opening outside the water-tight space 131. And a filter 113 capable of transmitting light. An annular hood 104 is connected to the hub 101 so as to surround the needle 102. A tube 105 of an infusion circuit is connected to the rear end of the hub 101. The rear end of the tube 105 can be connected to a chemical solution bottle or the like.

  For example, when the rear end of the tube 105 is connected to a chemical solution bottle, the chemical solution passes through the tube 105 to reach the medical connector 100 and enters the watertight space 131 formed by the sleeve 103 through the first passage 111 and the needle 102. Overflow. Since the second passage 112 having the filter 113 through which gas can pass is connected to the watertight space 131, the air in the watertight space 131 is pushed out from the filter 113 at the end of the second passage 112, and the watertight space 131. And the 2nd channel | path 112 will be in the state filled with the chemical | medical solution. Thus, the infusion line can be primed by using the medical connector 100 of the present embodiment.

  The medical connector 100 of this embodiment can be connected to a port 200 as shown in FIG. 2, for example. The port 200 includes a cylindrical housing 201 and a sealing material 202 provided at one end of the housing 201. The housing 201 can be formed of a resin such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyacrylonitrile, polycarbonate, acrylic-butadiene-styrene (ABS), or vinyl chloride. The sealing material 202 can be formed of, for example, natural rubber, isoprene rubber, synthetic rubber such as silicon rubber, or elastomer.

  The connector 100 can be easily connected to the port 200 by puncturing the needle 102 covered with the sleeve 103 into the sealing material 202 provided in the port 200 as it is. Since the needle 102 is covered with the sleeve 103 until the connector 100 is connected to the port 200, contamination of the needle 102 and erroneous puncture by the needle 102 are unlikely to occur. Furthermore, since the hood 104 is provided so as to surround the needle 102, it is possible to make it difficult for a finger or the like to touch the sleeve 103. Further, the hood 104 can be an engaging member that makes it difficult to remove the connector 100 from the port 200. A configuration in which the hood 104 is not provided is also possible.

  In the present embodiment, the hub 101 is formed by an outer cylinder 115 and an inner cylinder 116 inserted into the outer cylinder 115, and the filter 113 is inserted between the outer cylinder 115 and the inner cylinder 116. Yes. The outer cylinder 115 has a tube connecting portion that can connect the tube 105 to the rear end portion. In a portion excluding the tube connecting portion of the outer cylinder 115, a large diameter portion, a medium diameter portion, and a small diameter portion having different inner diameters are sequentially provided from the front end side. The inner diameter of the small diameter portion is substantially equal to the outer diameter of the needle 102, the inner diameter of the middle diameter portion is substantially equal to the outer diameter of the inner cylinder 116, and the inner diameter of the large diameter portion is substantially equal to the outer diameter of the filter 113. The filter 113 has a cylindrical shape having a flange on the front end side, and the length of the portion excluding the flange is substantially equal to the length of the large diameter portion of the outer cylinder 115. The inner diameter of the filter 113 is substantially equal to the outer diameter of the inner cylinder 116. The inner cylinder 116 is inserted into an outer cylinder 115 having a filter 113 inserted in the large diameter portion. The inner cylinder 116 is longer than the combined length of the medium diameter part and the large diameter part of the outer cylinder 115, and protrudes to the front end side from the outer cylinder 115. The inner diameter of the inner cylinder 116 is substantially equal to the outer diameter of the needle 102, the needle 102 is attached so as to penetrate the inner cylinder 116, and the rear end portion of the needle 102 is inserted into the small diameter portion of the outer cylinder 115.

  A portion of the inner cylinder 116 protruding from the outer cylinder 115 is provided with an annular locking portion 116 a that fixes the sleeve 103, and the sleeve 103 is fixed. At least a part of the front end surface of the filter 113 is not covered with the sleeve 103.

  A first space is provided in the axial direction on the inner wall of the inner cylinder 116 so that a gap is formed between the inner cylinder 116 and the needle 102. The first space may be formed by providing a groove on the inner wall of the inner cylinder 116. A second space is provided so that a gap is also formed between the outer cylinder 115 and the inner cylinder 116. The second space may be formed by providing the second groove on the inner wall of the middle diameter portion of the outer cylinder 115 and the step surface between the middle diameter portion and the small diameter portion. The first space and the second space are in communication with each other, and a second passage 112 reaching the filter 113 from the front end of the inner cylinder 116 is formed. By combining the outer cylinder 115, the inner cylinder 116, and the filter 113, the second passage 112 can be easily formed.

  The outer cylinder 115 and the inner cylinder 116 can be formed of a resin such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyacrylonitrile, polycarbonate, acrylic-butadiene-styrene (ABS), or vinyl chloride. The outer cylinder 115 and the inner cylinder 116 may be formed of the same material or different materials. The outer cylinder 115 and the inner cylinder 116 can be fixed with an adhesive. Further, it can be fixed by high frequency welding or the like, or can be fixed by fitting.

  The filter 113 may be any filter that allows gas to pass but does not allow liquid to pass. For example, a hydrophobic membrane filter or a sintered filter can be used. Among these, a sintered filter made of polyethylene, polypropylene, polymethyl methacrylate, polystyrene, or the like is preferable. Further, it may contain a water-absorbing polymer that swells when contacted with blood and closes the pores of the sintered body. As the water-absorbing polymer, starch or acrylate can be used. The content of the water-absorbing polymer can be about 5% to 30% with respect to the total weight of the sintered filter. The filter 113 can be fixed to the hub 101 with an adhesive. Further, it can be fixed by high frequency welding or the like, or can be fixed by fitting.

  The needle 102 can be formed of a metal such as stainless steel, aluminum, or titanium, or an alloy containing these metals. Moreover, if the sealing material 202 of the port 200 can be penetrated, it can also form with resin, such as a polycarbonate or ABS. The needle 102, the outer cylinder 115, and the inner cylinder 116 can be fixed with an adhesive. It can also be fixed by high frequency welding or the like.

  The sleeve 103 has a cylindrical shape having a bottom surface. The sleeve 103 only needs to be able to penetrate the needle 102 when the connector 100 is connected to the port 200, and can be formed of synthetic rubber such as natural rubber, isoprene rubber or silicon rubber, or elastomer.

  The hood 104 is a substantially cylindrical member, the front end portion has an inner diameter that is externally fitted to the port 200, and the rear end portion has an inner diameter that is in contact with the outer peripheral surface of the rear end portion of the hub 101. doing. The hood 104 has a length that completely covers the tip of the sleeve 103.

  By providing a claw-like protrusion at the front end of the hood 104 and providing a recess in the port 200 that engages with the protrusion of the hood 104, the hood 104 can be used as a retaining stopper. The hood 104 and the port 200 can be engaged by being pushed in, or can be brought into engagement by being rotated after being pushed.

  The hood 104 can be fixed to the outer peripheral surface of the hub 101. When the hood 104 is engaged with the port 200 by rotating, the hood 104 is preferably attached to the hub 101 so as to be rotatable. In the present embodiment, the hood 104 is prevented from falling back and forth by the annular protrusion provided at the rear end portion of the hub 101 and the tube 105 connected to the tube connecting portion. In addition, any configuration may be used as long as the hood 104 can be prevented from falling back and forth.

  The hood 104 can be formed of a resin such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyacrylonitrile, polycarbonate, acrylic-butadiene-styrene (ABS), or vinyl chloride.

  In the present embodiment, the second passage 112 is formed by providing a gap between the hub 101 and the needle 102. However, another configuration may be used as long as a passage having one end opened in the watertight section 131 and the other end opened outside the watertight space 131 can be provided. For example, the other end of the second passage 112 may open to the side surface or the rear end surface of the hub 101. In addition, although the filter 113 has a cylindrical shape, it may have any shape as long as gas can escape from the second passage 112 and the liquid can be sealed. FIG. 3 shows an example in which a through hole is provided between the front end and the side surface of the hub 101. One second passage 112 may be provided, but a plurality of second passages 112 may be provided around the needle 102.

  In this embodiment, the example in which the tube connection part which directly connects the tube 105 was provided in the rear-end part of the hub 101 was shown. However, a luer connector or the like can be provided at the rear end of the hub 101. Although an example in which the connector 100 of the present embodiment is connected to the port 200 provided in the middle of the line is shown, it can also be connected to a port provided at the end of the line.

  The connector of the present disclosure effectively protects the needle tip and facilitates priming, and is useful as a connector for an infusion system.

100 Connector 101 Hub 102 Needle 103 Sleeve 111 First passage 112 Second passage 113 Filter 115 Outer tube 116 Inner tube 116a Locking portion 200 Port 201 Housing 202 Sealing material

Claims (3)

A hub having a first passage extending axially;
A hollow needle fixed to the hub so as to communicate with the first passage;
A sleeve that covers the needle and forms a watertight space with a front end surface of the hub;
The hub is provided in a second passage having a first end opened in the watertight space, a second end opened outside the watertight space, and the second end of the second passage. A medical connector having a permeable filter.   The medical connector according to claim 1, further comprising an annular hood attached to the hub and surrounding the needle. The hub has an outer cylinder and an inner cylinder inserted into the outer cylinder,
The filter is a cylinder inserted between the outer cylinder and the inner cylinder,
The second passage is provided between the inner cylinder and the outer cylinder so as to communicate with the first space provided between the inner wall of the inner cylinder and the needle, and the first space. The medical connector according to claim 1, wherein the medical connector is formed by a second space that reaches the filter.

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