JP2012192062A - Dialyzing coupler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dialyzing coupler capable of reconciling both of the keeping of an excellent aseptic state and excellent operability at the time of attachment and detachment to a nozzle.SOLUTION: The dialyzing coupler includes the sleeve having the seal material applied to a dialyzing solution circulating nozzle arranged to the inner periphery thereof and fixed to the outer periphery of the seal material, the spring material coming into contact with the sleeve and capable of extending and contracting in the direction sealed to the nozzle and the slider sliding along the sleeve by the extension and contraction of the spring material. A ring-shaped member is provided between the seal material and the slider and pressed by the sliding of the slider to increase the liquid tightness between the seal material and the leading end part of the nozzle at the time of sealing.

Description

  The present invention relates to a dialysis coupler attached to supply a dialysate to a dialyzer, and more particularly to a dialysis coupler for the purpose of preventing contamination in the coupler without deteriorating the seal operability of the coupler. .

  In the artificial dialysis treatment, in order to remove water, electrolytes, wastes and the like in blood, these wastes and the like are removed by passing through a dialyzer. A dialysate is circulated in the dialyzer, and this dialysate is circulated by being connected to a dialyzer via a dialysate circulation nozzle (hereinafter referred to as a nozzle) provided on the side of the dialyzer. Has been.

  The dialysate device is attached to the dialyzer by a pipe having a predetermined length and a dialysis coupler attached to the end of the pipe.

  The coupler for dialysis attached to the nozzle of this dialyzer is composed of a large number of members, and it is necessary to maintain the contact portion with the nozzle in a sterile state for its use. And in order to prevent the liquid leakage of a connection part, the O-ring is used in the connection tool.

  However, it has been found that, for example, bacteria, endotoxins, and the like are prone to proliferate in the dialysate retention part. The retention of the dialysate occurs at the connection portion of each member, the back side of the O-ring, and the like. If bacteria or the like grown in the retention part enter the dialysate, it may enter the body of the dialysis patient and cause various infectious diseases. Further, it is common to periodically clean the connecting portion, but at that time, the back side of the O-ring or the like where the stagnation tends to occur cannot be cleaned, and bacteria or the like may remain.

  Therefore, as a dialysis coupler that does not use an O-ring, an attempt is made to seal the outer periphery of the nozzle body with an elastic body in a liquid-tight manner, and to fix the dialysis coupler to the constricted portion of the outer periphery of the nozzle to prevent the dialysis coupler from coming off. (Patent Documents 1 and 2). With this structure, it was possible to prevent dialysis fluid from staying during dialysis, and not to create an unwashed part even when washing the dialysis coupler.

  However, in this case, it is inevitable that the portion where the dialysis coupler and the nozzle are sealed in a liquid-tight manner becomes a constricted portion of the nozzle which is fixed to prevent the dialysis from being removed. For this reason, when the coupler is removed from the nozzle after dialysis, it has been considered that the dialysate collected outside the nozzle and the inner periphery of the dialysis coupler is scattered.

  Furthermore, since the entire nozzle is liquid-tightly sealed, the resistance when the dialysis coupler is attached / detached is large, and the operability cannot be denied.

JP 2007-151628 A JP 2001-299907 A

  An object of the present invention is to obtain a dialysis coupler capable of achieving both excellent sterility and excellent operability for a dialysis coupler.

In order to achieve the above object, the present invention provides the following methods. That is,
1. A sealing material sealed to the dialysate circulation nozzle is arranged on the inner periphery, and a sleeve fixed to the outer periphery of the sealing material, a spring material that comes into contact with the sleeve and expands and contracts in the direction sealed by the nozzle And a dialysis coupler including a slider that slides along the sleeve by expansion and contraction of the spring material, and has a ring-shaped member between the seal material and the slider, and the ring-shaped member is the slider. A dialysis coupler characterized in that it increases the liquid tightness between the sealing material and the tip of the nozzle at the time of sealing when pressed by sliding.
2. 2. The dialysis according to 1 above, wherein the sealing material has a protrusion that fits or engages with a constriction in the longitudinal direction of the nozzle when the dialysis coupler is sealed, or a ring-shaped structure having the protrusion. Coupler.
3. 3. The above 1 or 2, wherein at least one of an outer peripheral surface pressed corresponding to the first cylindrical portion of the nozzle in the sealing material and an inner periphery of the ring-shaped member has a tapered shape. Dialysis coupler.
4). A dialysis apparatus comprising the dialysis coupler according to any one of 1 to 3 above.

  An object of the present invention is to provide a dialysis coupler capable of achieving both excellent sterility and excellent operability.

FIG. 6 is a cross-sectional view showing an example of a state in which a dialysis coupler is sealed by a nozzle and a sealing material is pressed by a ring-shaped member to maintain a sealed state. It is a schematic diagram which shows an example of the state in which the liquid-tight seal | sticker is open immediately before attachment of the dialysis coupler 1 or immediately after removal. It is a schematic diagram which shows the variation shape by which the sealing material was equipped with the ring-shaped structure. It is a schematic diagram which shows the variation shape by which the ring-shaped structure was equipped at the front-end | tip of the sealing material. It is a schematic diagram which shows the aspect which made it possible to press the top | upper surface of a nozzle using a step-shaped ring-shaped member. It is a schematic diagram which shows the aspect whose ring-shaped member and slider are integral shapes.

  Hereinafter, although the one aspect | mode of the coupler for dialysis of this invention is demonstrated based on drawing, the following preferable aspect and illustration are not limited to this case.

  FIG. 1 is a schematic view showing an example of a state in which a dialysis coupler 1 according to the present invention is crowned by a nozzle 60 and a liquid-tight seal state is maintained. The dialysis coupler 1 is provided with a seal material 10 on the portion directly sealing the dialysate circulation nozzle, that is, on the inner periphery, and on the outer periphery of the seal material 10 there is a flanged sleeve 20 for fixing the seal material 10. The spring material 30 is in contact with the sleeve 20. The spring material can be expanded and contracted in the direction in which the coupler is covered with the nozzle 60, and a slider 40 is provided on the outer periphery of the spring material 30 so as to slide along the sleeve in that direction. Furthermore, a ring-shaped member 50 that makes the sealing material 10 adhere more liquid tightly to the nozzle 60 by the sliding action of the slider is disposed in the circumference between the sealing material and the slider.

  The sealing material 10 and the flanged sleeve 20 are fixed by a retaining groove portion 11 in the sealing material 10 and a retaining step portion 21 in the flanged sleeve 20, and the slider is driven by the extending force of the spring material 30 that contacts the flanged sleeve 20. 40 slides along the flanged sleeve 20, and the sealing material 10 is brought into close contact with the first cylindrical portion 62 of the nozzle 60 via the ring-shaped member 50, whereby the dialysis coupler 1 is sealed in a liquid-tight manner with the nozzle 60. Is done.

  In the sealing material 10, the inner peripheral shape of the portion fitted with the nozzle 60 is equal to the outer peripheral shape and size of the first cylindrical portion 62 of the nozzle 60, or the size is slightly smaller than this. When the sealing material 10 is pressed by the ring-shaped member 50, the dialysis coupler 1 and the nozzle 60 can be sealed more liquid-tight.

  The inner peripheral shape of the ring-shaped member 50 is appropriately determined depending on the required liquid-tight sealability, but is a shape capable of expressing a force that presses the first cylindrical portion 62 of the nozzle 60 from the circumferential direction as much as possible. Is preferred. Furthermore, the inner peripheral shape of the ring-shaped member 50 is more preferably a shape that can be deformed by applying pressure to the sealing material 10 when the sealing is completed. By pressing the sealing material 10, the sealing material 10 can be brought into close contact with the nozzle 60 to be liquid-tightly sealed.

More preferably, at least one of the inner peripheral shape of the ring-shaped member 50 and the corresponding outer peripheral shape of the sealing material 10 has a certain taper shape with respect to the axis of the nozzle 60. As a result, when the ring-shaped member 50 slides in a state in which the ring-shaped member 50 is in contact with the sealing material 10 by the spring material 30 via the slider 40, the sealing material 10 and the nozzle 60 are used until the liquid-tight sealing is completed. It is possible to prevent deterioration in operability due to the frictional force between each other.
The taper shape is appropriately determined depending on the required sealing performance and operability when the dialysis coupler 1 is attached to or detached from the dialysis coupler 1, but is preferably 5 ° to 30 °, more preferably 10 ° to 20 ° with respect to the axial direction of the nozzle. If it is.

  FIG. 2 is a schematic view showing an example of a state in which the liquid tight seal is opened immediately before or after the dialysis coupler 1 is attached.

  When removing the dialysis coupler 1, the slider 40 is pulled up so that a force in the direction of pulling away from the seal member 10 via the inner peripheral flange 41 is applied to the ring-shaped member 50. Is possible.

  Further, when the sealing material 10 is sealed by the nozzle 60 and sealed in a liquid-tight manner, the force for pressing the ring-shaped member 50 via the slider is appropriately determined depending on the shape of the spring material 30. The larger the repulsive force of the spring material 30 is, the more the ring-shaped member 50 is pressed against the seal material 10 and thus the sealing performance is improved. To do. Therefore, it is preferable that the force is such that even a female nurse can perform the attaching / detaching operation without any problem.

  In addition, the dialysis coupler according to the present invention preferably has a structure in which the sealing material 10 is fixed to the nozzle 60 even at a location different from the first cylindrical portion 62 when the liquid-tight seal is completed. This is necessary to maintain a reliable fluid tight seal in order to prevent the dialyzing fluid from leaking out of the nozzle 60 when an external force is applied due to an unexpected operation or environmental change. The lock structure.

  As an example of such a lock structure, it is preferable to use the constricted portion 63 of the nozzle 60, and the inner peripheral projection at a position corresponding to the nozzle constricted portion 63 on the inner peripheral surface of the sealing material 10 when the dialysis coupler is sealed. This can be achieved by providing 14. The inner peripheral projection can be attached to a ring-shaped structure 70 provided on the sealing material as will be described later.

  The outer peripheral shape of the dialysate circulation nozzle in the dialyzer is standardized by, for example, JIS T3250: 2005, and the constricted portion is not an exception and is constant, so the shape of the inner peripheral protrusion always obtains the desired fit. It is possible.

  The shape of the inner peripheral protrusion 14 is appropriately determined depending on the material of the sealing material 10, but is preferably a shape that follows the shape of the nozzle constriction 63. Moreover, it is more preferable to arrange them at an arbitrary distribution so as not to deteriorate the operability at the time of attachment / detachment.

Further, in order to further strengthen the fixing of the sealing material 10 to the nozzle 60 by the inner peripheral protrusion 14, the outer peripheral protrusion 13 is provided on the sealing material 10, and the engagement convex portion 42 formed on the inner peripheral surface of the slider 40 from the outer periphery. By performing the backup fixing, it is possible to prevent the sealing material 10 from being deformed in the circumferential direction, and it is possible to maintain the fixing of the sealing material 10 by the inner peripheral protrusion 14. The shape of the outer peripheral protrusion 13 and the engaging protrusion 42 is not particularly specified, but it is not necessary to form both on the entire periphery, and they may be arranged in any uniform arrangement so long as the fixation is maintained.

The material of the sealing material 10 is appropriately determined in order to reliably seal the nozzle 60 by being pressed by the ring-shaped member 50, and is preferably formed of a resin having a hardness (type A) of 60 to 80 degrees. Further, in the present invention, in order to achieve a high required cleanliness, it is preferable that the sealing material 10 which is a liquid contact portion in the coupler is formed of silicon rubber. When the wetted part is formed of silicon rubber, the wetted surface is not easily deteriorated, and dirt and foreign matter are not easily attached to the wetted surface. Due to the elasticity, the attaching / detaching work can be performed smoothly.

  Further, in order to efficiently apply the extending force of the spring member 30 to the sealing member 10 via the ring-shaped member 50 and bring it into contact with the nozzle 60, the material of the ring-shaped member 50 is preferably hard, Hard resin can be used. More preferable examples include stainless steel having excellent corrosion resistance, and polypropylene, polyethylene, polyacetal, or fluororesin having excellent chemical resistance.

  FIG. 3 is a schematic diagram showing an example of the dialysis coupler 1 in the case where the seal member 10 is provided with a ring-shaped structure 70 in order to prevent the deformation of the inner peripheral protrusion 14 and fix the seal member 10 to the nozzle 60. Yes, it is effective for fixing the sealing material 10 further. Here, unlike the ring-shaped member 50, the ring-shaped structure 70 is formed of a hard resin at a position corresponding to the inner peripheral protrusion 14 of the nozzle 60, as shown in FIG. It is provided on the outer periphery. As a result, deformation and elongation of the sealing material 10 can be reduced, and the fixing of the sealing material 10 and the nozzle 60 can be achieved more firmly together with the fixing by the ring-shaped member 50.

  Furthermore, when it is desired to more firmly fix the sealing material 10 and the nozzle 60, as shown in FIG. 4, the ring-shaped structure 70 having a shape covering the nozzle body is provided at the tip of the sealing material 10. Is preferred. By fitting the inner peripheral protrusion 14 of the ring-shaped structure 70 made of hard resin into the constricted portion 63 of the nozzle 60, the deformation and elongation of the sealing material 10 itself can be reduced, and the ring-shaped member 50 It is possible to achieve the fixation of the sealing material 10 and the nozzle 60 more firmly together with the fixation by the above.

  In any case, the ring-shaped structure 70 formed of a hard resin is firmly fitted to the sealing material 10, or is adhesively fixed, or two-color molding or insert molding with the sealing material 10. It is preferable that the ring-shaped structure 70 is made of a material such as polypropylene, polyethylene, polyacetal or fluororesin having excellent chemical resistance, like the ring-shaped member 50.

  FIG. 5 is a schematic diagram showing an example of the dialysis coupler 1 when the ring-shaped member 50 has a stepped shape.

  In order to strengthen the liquid-tight seal between the sealing material 10 and the nozzle 60, it is preferable not only to seal the first cylindrical portion 62 of the nozzle 60 but also to seal the nozzle top surface 61 together. By making the shape of the ring-shaped member 50 stepped and adding the function of bringing the sealing material 10 into contact with the nozzle top surface 61 and pressing it, the dialysis coupler 1 and the nozzle 60 are made more fluid-tight. It is possible to seal.

  FIG. 6 is a schematic diagram showing an example of the dialysis coupler 1 when the ring-shaped member 50 is integrated with the slider 40.

  By integrating the function of pressing the sealing member 10 of the ring-shaped member 50 into the inner peripheral surface of the slider 40 that slides with the spring member 30, the number of parts constituting the dialysis coupler 1 can be reduced. .

DESCRIPTION OF SYMBOLS 1 Dialysis coupler 10 Sealing material 11 Retaining groove part in sealing material 12 Outer peripheral taper part 13 Outer peripheral protrusion 20 Flange sleeve 21 Retaining step part in flanged sleeve 20 30 Spring material 40 Slider 41 Inner peripheral collar part 42 Engaging convex part 50 Ring-shaped member 60 Nozzle for dialysate circulation 61 Top surface 62 First cylindrical portion 63 Constricted portion 70 Ring-shaped structure

Claims (4)

  A sealing material sealed to the dialysate circulation nozzle is arranged on the inner periphery, and a sleeve fixed to the outer periphery of the sealing material, a spring material that comes into contact with the sleeve and expands and contracts in the direction sealed by the nozzle And a dialysis coupler including a slider that slides along the sleeve by expansion and contraction of the spring material, and has a ring-shaped member between the seal material and the slider, and the ring-shaped member is the slider. A dialysis coupler characterized in that it increases the liquid tightness between the sealing material and the tip of the nozzle at the time of sealing when pressed by sliding.   The said sealing material has a ring-shaped structure provided with the protrusion or the said protrusion which fits or engages with the constriction part in the longitudinal direction of the said nozzle at the time of the sealing of the said dialysis coupler. Dialysis coupler.   The at least one of the outer peripheral surface pressed corresponding to the 1st cylindrical part of the said nozzle in the said sealing material or the inner periphery of a ring-shaped member has a taper shape, It is characterized by the above-mentioned. The dialysis coupler as described.   A dialysis apparatus comprising the dialysis coupler according to any one of claims 1 to 3.

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