Patent Application
20220143382
The present invention relates to a wiping tip for cleaning a male connector that is preferably used for enteral nutrition.
Enteral nutrition is known as a method for administering liquid matter containing nutrient agents, drugs, or the like to patients who cannot use their mouth to eat. In enteral nutrition, a catheter is inserted from outside the body into the gastrointestinal tract (e.g., the stomach) of a patient and is indwelled therein. Known examples of the catheter include a nasal catheter, which is inserted from the nose of a patient, and a PEG (percutaneous endoscopic gastrostomy) catheter, which is inserted into a gastrostomy formed in the abdomen of a patient. Liquid matter such as nutrient agents, liquid foods (commonly referred to as “enteral nutrients”), or drugs is administered to a patient via a catheter. A container storing liquid matter is connected to a catheter (a nasal catheter, a PEG catheter, etc.) indwelled in a patient. In order to connect different members, a connector constituted by a male connector and a female connector is used.
As this sort of connector, a connector including a male connector 910 shown in
The male connector 910 in
The female connector 920 in
The male connector 910 and the female connector 920 are connected by inserting the male member 911 into the tubular portion 921 and screwing the female thread 915 and the spiral protrusion 925 to each other. The outer circumferential face 912 of the male member 911 and the inner circumferential face 922 of the tubular portion 921 are tapered surfaces with the same diameter and taper angle, and thus they are in liquid-tight surface contact.
In enteral nutrition, the female connector 920 is used as a connector on the upstream side (container side) and the male connector 920 is used as a connector on the downstream side (patient side) with respect to the flow direction of liquid matter.
In the male connector 910, the outer cylinder 913 surrounds the male member 911, and the inner circumferential face of the outer cylinder 913 is provided with the female thread 915. Accordingly, after enteral nutrition has been carried out, liquid matter (an enteral nutrient) tends to remain in a gap 916 between the male member 911 and the outer cylinder 913 (e.g., in the valley of the female thread 915).
When the male connector 910 is arranged at the upstream end of the catheter inserted into a patient, the male connector 910 is indwelled together with the catheter in the patient for along period of time. If the male connector 910 continues to be indwelled in the patient with residual liquid matter, the male connector 910 may become unsanitary. Furthermore, solidified substances formed by liquid matter dried and solidified on the male connector 910 prevent the male connector 910 and the female connector 920 from being reconnected to each other. Accordingly, it is desirable to make the male connector 910 clean through cleaning.
Patent Document 1 describes a wiping tip for cleaning the male connector 910. The wiping tip includes a water-absorbing cylindrical portion. The cylindrical portion is inserted into the gap 916 between the male member 911 and the outer cylinder 913. Liquid matter remaining in the gap is absorbed by the cylindrical portion and wiped off.
Patent Document 1 describes that the cylindrical portion is constituted by a foam or a non-woven fabric made of urethane or polyvinyl alcohol, and can be produced through press molding, transfer molding, or the like. However, it is difficult to mold a foam or a non-woven fabric made of the above-mentioned materials into a cylindrical portion with desired strength. If the cylindrical portion is too soft, the cylindrical portion is likely to deform when it is inserted into the gap 916 between the male member 911 and the outer cylinder 913. Accordingly, the cylindrical portion cannot be inserted deep enough to reach the bottom plate 914, and it is difficult to wipe off liquid matter adhering to the vicinity of the bottom plate 914. On the other hand, if the cylindrical portion is too hard, the cylindrical portion cannot deform to match the male connector 910. Accordingly, for example, it is difficult to wipe off liquid matter adhering to the inside of the groove of the female thread 915 or a corner in the vicinity of the bottom plate 914. In this manner, conventional wiping tips are problematic in that it is not possible to completely wipe off liquid matter adhering to the male connector 910.
It is an object of the present invention to provide a wiping tip capable of cleanly cleaning a male connector provided with a female thread formed so as to surround a male member.
The present invention is directed to a wiping tip including: a hollow cylindrical member; and a cotton-like wiping member arranged on the cylindrical member. The cotton-like wiping member constitutes a thin film portion covering an opening at an end of the cylindrical member, and an outer circumferential portion extending from the thin film portion and covering an outer circumferential face of the cylindrical member over a predetermined length from the end.
The cylindrical member makes it possible to deeply insert the cotton-like wiping member into a gap between a male member and an outer cylinder. The cotton-like wiping member is interposed between a cylindrical member and a male connector. Thus, according to the present invention, it is possible to cleanly dean a male connector provided with a female thread formed so as to surround a male member.
In the wiping tip of the present invention, the cotton-like wiping member may be arranged at both ends of the cylindrical member. According to this aspect, for example, a male connector can be cleanly cleaned by sequentially using the cotton-like wiping members at the two ends.
Alternatively, the cotton-like wiping member may be arranged at only one end of the cylindrical member. This aspect is advantageous in urging a user to dispose of the wiping tip of the present invention after single use.
The cotton-like wiping member may be impregnated with a cleaning solution. This aspect is advantageous in cleanly cleaning the male connector.
A slit may be formed through the thin film portion. This aspect is advantageous, first, in allowing the male member to pierce the thin film portion with ease, and, second, in uniformly wiping clean the outer circumferential face of the male member.
A cotton-like filling member may be placed in the cylindrical member. This aspect is advantageous in wiping off liquid matter adhering to the end of the male member.
In the wiping tip of the present invention, the wiping tip may include a stick-shaped rod. Furthermore, a hole may be provided over a predetermined length extending along a longitudinal direction of the rod, from an end face of the rod. The portion of the rod in which the hole is provided may be the cylindrical member. The portion of the rod other than the cylindrical member is solid, and has relatively high strength. The wiping tip including this rod is advantageous in efficiently performing cleaning.
In the wiping tip of the present invention, one end thereof may include the cylindrical member provided with the cotton-like wiping member, and another end thereof may include a handle. This aspect is advantageous in improving the cleaning efficiency and keeping the cotton-like wiping member clean.
In the wiping tip of the present invention, the wiping tip may be used to wipe clean a male connector including: a cylindrical male member; an outer cylinder surrounding the male member; and a female thread formed on an inner circumferential face of the outer cylinder facing the male member. According to this aspect, a male connector that is used as a patient-side connector in enteral nutrition can be cleaned using the wiping tip of the present invention.
The thin film portion may be penetrable by the male member. The cylindrical member may be insertable into a gap between the male member and the outer cylinder. According to this aspect, the end of the male member and the faces of the male member and the cylindrical member defining the gap can be wiped dean.
In the wiping tip of the present invention, the thin film portion may be configured to be penetrated by the male member and folded into the cylindrical member. According to this aspect, the folded thin film portion wipes off liquid matter adhering to the outer circumferential face of the male member.
An outer diameter of the outer circumferential portion may be larger than an inner diameter of the female thread. This aspect is advantageous in wiping off liquid matter adhering to the inside of the groove of the female thread.
An outer diameter of the cylindrical member may be equal to or smaller than an inner diameter of the female thread. According to this aspect, the wiping tip can be deeply inserted into the gap between the male member and the outer cylinder. This aspect is advantageous in cleanly cleaning the male connector.
An inner diameter of the cylindrical member may be equal to or larger than a maximum outer diameter of an outer circumferential face of the male member. This aspect is advantageous in the following points. First, the wiping tip can be deeply inserted into the gap between the male member and the outer cylinder. It is advantageous in cleanly cleaning the male connector. Second, the thin film portion torn by the male member can be reliably interposed between the male member and the cylindrical member. It is advantageous in preventing the cylindrical member from damaging the outer circumferential face of the male member.
Hereinafter, the present invention will be described in detail while showing preferred embodiments thereof. However, it will be appreciated that the present invention is not limited to the embodiments below. In the drawings that will be referred to in the following description, only the main members constituting the embodiments of the present invention are shown in a simplified manner for the sake of convenience of description. Therefore, an optional member that is not shown in the drawings referred to below may be included. Furthermore, any of the members shown in the drawings may be changed or omitted, within the scope of the present invention. In the drawings that will be referred to in the description of the embodiments below, members corresponding to those shown in the drawings that are referred to in the description of any preceding embodiment are denoted by the same reference numerals as those of the members shown in the drawings of that preceding embodiment. With respect to such members, redundant descriptions are omitted, and the description of the preceding embodiment should be taken into account.
The cylindrical member 10 has a hollow cylindrical shape in which a hole 11 extending along the longitudinal direction of the cylindrical member 10 is formed through the cylindrical member 10. The hole 11 is a through-hole connecting the two ends of the cylindrical member 10, and is connected to the outside via openings at the two ends of the cylindrical member 11. The outer circumferential face and the inner circumferential face of the cylindrical member 10 both have a circular cross-sectional shape. The inner diameter and the outer diameter of the cylindrical member 10 are each constant along the longitudinal direction of the cylindrical member 10. The cylindrical member 10 is strong enough so as to not allow the cylindrical member to substantially deform when it is pinched by user's fingers or when a bending force or a torsional force is applied thereto. There is no limitation on the material of the cylindrical member 10, but examples thereof include resin materials such as polyethylene, polypropylene, polycarbonate, styrene ethylene, polyethylene terephthalate, polybutylene terephthalate, a butylene styrene block copolymer, polyacetal, polyamide, and hard polyvinyl chloride, and, of these materials, it is preferable to use polyolefin-based resins such as polyethylene and polypropylene. It is preferable that the cylindrical member 10 is integrally produced as a single component through injection molding of the above-described resin materials.
The cotton-like wiping member 20 is a cotton-like material in which fibers are entwined. There is no limitation on the material of the cotton-like wiping member 20, but examples thereof include water-absorbing materials such as cotton and rayon, and it is particularly preferable to use absorbent cotton. The cotton-like wiping member 20 constitutes a thin film portion 21 in the shape of a thin film covering an opening at an end of the cylindrical member 10, and an outer circumferential portion 23 extending from the thin film portion 21. The outer circumferential portion 23 covers the outer circumferential face of the cylindrical member 10, over a predetermined length from the end of the cylindrical member 10. The cotton-like wiping member 20 is arranged at an end of the cylindrical member 10 such that the thin film portion 21 and the outer circumferential portion 23 are continuously formed.
There is no limitation on the method for attaching the cotton-like wiping member 20 to the cylindrical member 10, and, for example, it is possible to use substantially the same method as a method for producing a cotton swab. That is to say, a cotton-like material with a predetermined size is pressed against the end of the cylindrical member 10 so as to close the opening of the cylindrical member 10, and the cylindrical member 10 is rotated so that the cotton-like material is wound around the outer circumferential face of the cylindrical member 10. It is also possible to firmly fix the cotton-like wiping member 20 to the cylindrical member 10 using an adhesive made of PVA (polyvinyl alcohol) or the like. The adhesive is preferably applied to only part (e.g., the portion of the outer circumferential portion 23 farthest from the end of the cylindrical member 10) of the outer circumferential portion 23. The cotton-like wiping member 20 is soft and elastic except for the portion to which the adhesive is applied.
Hereinafter, a method for using the wiping tip 1 will be described.
The wiping tip 1 can be used to clean a male connector 90 shown in
When carrying out enteral nutrition, a female connector (see
First, as shown in
Next, as shown in
As shown in
The wiping tip 1 is rotated in a clockwise direction with respect to the male connector 90 when viewed from the wiping tip 1 side. The outer circumferential portion 23 of the cotton-like wiping member 20 moves along the female thread 915 of the male connector 90. Even when a rotational force is applied to the wiping tip 1, the cylindrical member 10 does not substantially deform. In accordance with the rotation of the wiping tip 1, the wiping tip 1 enters (moves forward) deeper into the gap 916 of the male connector 90. Finally, as shown in
Subsequently, the wiping tip 1 is rotated in the opposite direction (the counterclockwise direction) with respect to the male connector 90. The outer circumferential portion 23 of the cotton-like wiping member 20 moves along the female thread 915 of the male connector 90. In accordance with the rotation of the wiping tip 1, the cylindrical member 10 gradually moves backward from the gap 916 of the male connector 90. Then, the wiping tip 1 is separated from the male connector 90. The used wiping tip 1 is then disposed of.
When the wiping tip 1 is inserted into the male connector 90 and then pulled out from the male connector 90 as described above, the male connector 90 can be cleaned by allowing the cotton-like wiping member 20 to wipe off liquid matter adhering to the male connector. The liquid matter is removed from the male connector 90 in a state of being absorbed by the cotton-like wiping member 20 and retained in the cotton-like wiping member 20. Solid substances contained in the liquid matter are also wiped off and removed by the cotton-like wiping member 20 together with the liquid matter.
In the above-described conventional wiping tips, the entire cylindrical portion configured to be inserted into the gap 916 of the male connector is made of a water-absorbing material. Accordingly, it is difficult to produce a cylindrical portion with desired strength. If the cylindrical portion is too soft or too hard, it is not possible to completely wipe off liquid matter.
On the other hand, in the wiping tip 1 of Embodiment 1, the hollow cylindrical member 10 is provided with the cotton-like wiping member 20.
The cylindrical member 10 functioning as a core can be made of a material with desired strength. Accordingly, even when the wiping tip 1 is moved forward and backward while it is rotated with respect to the male connector 90, the cylindrical member 10 does not substantially deform. It is easy to insert the cotton-like wiping member 20 arranged on the cylindrical member 10 into the gap 916 until the cotton-like wiping member 20 comes into contact with the bottom plate 914.
The cotton-like wiping member 20 is likely to deform to match the shape of the surface of the male connector 90 with which the cotton-like wiping member 20 has been brought into contact. The cotton-like wiping member 20 continuously extends from the thin film portion 21 covering an opening of the cylindrical member 10 to the outer circumferential portion 23 covering the outer circumferential face of the cylindrical member 10. During the process in which the wiping tip 1 is moved forward and backward while it is rotated with respect to the male connector 90, the outer circumferential portion 23 of the cotton-like wiping member 20 wipes dean the female thread 915 formed on the inner circumferential face of the outer cylinder 913. The outer circumferential portion 23 deforms to match the thread shape of the female thread 915, enters the groove of the female thread 915, and wipes off liquid matter adhering to the groove. The cotton-like wiping member 20 covering the circular end of the cylindrical member 10 wipes off liquid matter adhering to the bottom plate 914, a corner at the boundary between the bottom plate 914 and the outer cylinder 913, and a corner at the boundary between the bottom plate 914 and the male member 911.
In an initial state, the thin film portion 21 of the cotton-like wiping member 20 covers an opening of the cylindrical member 10. During the process in which the male member 911 penetrates the thin film portion 21 (see
The thin film portion 21 penetrated by the male member 911 is folded into the hole 11 of the cylindrical member 10 and is held between the male member 911 and the cylindrical member 10. When the wiping tip 1 is pushed into and pulled out from the male connector 90, the thin film portion 21 moves along the outer circumferential face 912 of the male member 911, and wipes off liquid matter adhering to the outer circumferential face 912.
In this manner, according to Embodiment 1, the strength necessary for the wiping tip 1 is ensured by the cylindrical member 10. During the cleaning of the male connector 90 using the wiping tip 1, the cotton-like wiping member 20 is always interposed between the cylindrical member 10 and the male connector 90. When the wiping tip 1 is pushed into and pulled out from the male connector 90, the cotton-like wiping member 20 moves while remaining in contact with the male connector 90. Accordingly, it is possible to completely wipe off liquid matter adhering to the male connector 90. The wiping tip 1 is advantageous in cleanly cleaning the male connector 90.
In a used wiping tip 1, the thin film portion 21 has been torn. It is possible to easily determine whether or not the wiping tip has been used, by looking at the thin film portion 21. The possibility of using a used wiping tip 1 again by mistake is low. According to this aspect as well, the wiping tip 1 is advantageous in cleanly cleaning the male connector 90.
The cylindrical member 10 has a simple hollow cylindrical shape. The cotton-like wiping member 20 can be wound around the end of the cylindrical member 10 using substantially the same method as a method for producing a cotton swab. Accordingly, the wiping tip 1 has a simple structure and can be easily produced. The wiping tip 1 can be produced in large quantities at low cost.
An outer diameter D20 (see
A length L20 (see
An outer diameter D10 (see
An inner diameter D11 (see
The cotton-like wiping member 20 may be impregnated with a cleaning solution. There is no limitation on the cleaning solution, but examples thereof include alcohol and sterilized purified water. Solidified substances and the like formed by liquid matter dried and stuck to the male connector 90 can be removed clean using the cleaning solution.
In the wiping tip 1, the cotton-like wiping member 20 is arranged at both ends of the cylindrical member 10. Accordingly, first, most of the liquid matter adhering to the male connector 90 can be wiped off using one of the cotton-like wiping members 20, and then a slight amount of still remaining liquid matter can be wiped off clean using the other cotton-like wiping member 20. It is possible to cleanly dean the male connector 90 with a small number of wiping tips 1.
The two ends of the wiping tip 1 may be symmetrical or asymmetrical. For example, one of the cotton-like wiping members 20 may be formed thicker than the other cotton-like wiping member 20. This aspect is advantageous, for example, in wiping clean a plurality of types of male connectors 90 with different dimensions, using a common wiping tip.
In the wiping tip of the present invention, the cotton-like wiping member 20 does not have to be arranged at both ends of the cylindrical member (rod) 10, and, as in a wiping tip 1′ in
The wiping tip 2 of Embodiment 2 can be used to clean the male connector 90 as in the case of the wiping tip 1 of Embodiment 1.
In Embodiment 2, when the end of the male member 911 of the male connector 90 is pressed against the thin film portion 21, the thin film portion 21 is torn from the slit 22 (particularly two ends thereof). This aspect has the following effects. First, the thin film portion 21 is easily torn. Accordingly, the male member 911 can penetrate the thin film portion 21 merely with application of a relatively small force. Even an inexperienced operator can easily insert the wiping tip 2 into the gap 916 of the male connector 90. Second, the thin film portion 21 is torn always in a stable manner, for example, such as the thin film portion 21 being torn into substantially two equal parts. Even when the male member 911 is pressed against a position slightly deviated from the center of the thin film portion 21, there is little variation in the torn manner. When the male member 911 is inserted into the cylindrical member 10, the torn thin film portion 21 surrounds the outer circumferential face 912 of the male member 911 substantially evenly in the circumferential direction. This aspect is advantageous in uniformly wiping off liquid matter adhering to the outer circumferential face 912.
The slit 22 may be formed through both thin film portions 21 at the respective ends of the wiping tip 2, or only one of the thin film portions 21. The shape of the slit 22 is not limited to that in this embodiment, and may be changed as necessary.
Embodiment 2 is the same as Embodiment 1, except for the above-described aspects. The description of Embodiment 1 applies also to Embodiment 2.
The wiping tip 3 of Embodiment 3 can be used to clean the male connector 90 as in the case of the wiping tip 1 of Embodiment 1.
In Embodiment 3, when the male member 911 of the male connector 90 penetrates the thin film portion 21 and enters the hole 11, the cotton-like filling member 25 comes into contact with the end of the male member 911. When the wiping tip 3 is rotated and moved forward to the male connector 90, the male member 911 gradually compresses or moves the cotton-like filling member 25 while rotating with respect to the cotton-like filling member 25. Even in the case in which liquid matter adhering to the end of the male member 911 is not completely wiped off by the thin film portion 21 when the male member 911 pierces the thin film portion 21, the liquid matter can be wiped off later by the cotton-like filling member 25.
Not only portions in the vicinity of the two ends of the hole 11 of the cylindrical member 10 but also a portion over substantially the entire length of the hole 11 may be filled with the cotton-like filling member 25.
The cotton-like filling member 25 may be impregnated with the cleaning solution described in Embodiment 1.
Embodiment 3 is the same as Embodiment 1, except for the above-described aspects. The description of Embodiment 1 applies also to Embodiment 3. Embodiment 3 may be applied to the wiping tip 2 of Embodiment 2.
The wiping tip 4 of Embodiment 4 can be used to clean the male connector 90 as in the case of the wiping tip 1 of Embodiment 1. The male member 911 pierces the thin film portion 21 and is inserted into the holes 16. The depth of each of the holes 16 is more than the length of the male member 911 of the male connector 90 (the protruding length of the male member 911 from the bottom plate 914).
Since the portion of the rod 15 other than the portions in which the holes 16 are formed is a solid columnar member, it has relatively high strength. Accordingly, the rod 15 is not crushed in the diameter direction or bent by a force applied during wipe cleaning. It is possible to efficiently perform cleaning.
The hole 16 and the cotton-like wiping member 20 may be arranged at only one end of the rod 15.
Embodiment 4 is the same as Embodiment 1, except for the above-described aspects. The description of Embodiment 1 applies also to Embodiment 4. Embodiment 4 may be applied to the wiping tips 2 and 3 of Embodiments 2 and 3.
The wiping tip 5 of Embodiment 5 can be used to clean the male connector 90 as in the case of the wiping tip 1 of Embodiment 1.
An operator can perform wipe cleaning while gripping the handle 30. The handle 30 is relatively large and is unlikely to deform, and thus the operator can firmly grip the handle 30. It is also easy to apply a rotational force to the wiping tip 5. Accordingly, the cleaning efficiency is improved. Furthermore, since the operator is unlikely to touch the cotton-like wiping member 20, the cotton-like wiping member 20 is kept clean.
The cylindrical member 10 may be integrated with the handle 30 so as not to be separated therefrom. There is no limitation on the method for integrating the cylindrical member 10 and the handle 30, but examples thereof include a method in which the cylindrical member 10 and the handle 30 are separately produced, after which they are connected to each other into one piece using an adhesive, welding, or the like, and a method in which one of the cylindrical member 10 and the handle 30 is produced, after which the other is integrated with the one through double-molding. Alternatively, it is also possible to integrally mold the cylindrical member 10 and the handle 30 simultaneously as one component using the same material.
The cylindrical member 10 may be detachably attached to the handle 30. In this case, the handle 30 can be repeatedly used while the cylindrical member 10 provided with the cotton-like wiping member 20 is disposed of after single use. In order to allow a rotational force applied to the handle 30 to be reliably transferred to the cylindrical member 10, the handle 30 and the cylindrical member 10 may have a fitting shape (e.g., a projection and a recess) in which they are fitted to each other at the corresponding connecting portions.
In
In
Embodiment 5 is the same as Embodiment 1, except for the above-described aspects. The description of Embodiment 1 applies also to Embodiment 5. Embodiment 5 may be applied to the wiping tips 2 to 4 of Embodiment 2 to 4.
Embodiments 1 to 5 above are merely an example. The present invention is not limited to Embodiments 1 to 5, and may be changed as appropriate.
In the foregoing embodiments, the outer circumferential face and the inner circumferential face of the cylindrical member both have a circular cross-sectional shape, but the present invention is not limited to this. For example, one or both of the outer circumferential face and the inner circumferential face may have a cross-section in the shape of a regular polygon (e.g., a regular octagon, etc.). The outer circumferential face having such a cross-sectional shape is advantageous in applying a rotational force to the wiping tip.
In the foregoing embodiments, the inner circumferential face of the cylindrical member is a cylindrical face whose inner diameter is constant in the longitudinal direction, but the present invention is not limited to this. In a portion into which the male member 911 is inserted, the inner circumferential face of the cylindrical member may have a female tapered surface whose inner diameter increases toward the opening (e.g., a female tapered surface with the same taper angle as that of the outer circumferential face 912 of the male member 911).
The wiping tip of the present invention may be of a disposable type in which the wiping tip is disposed of after each cleaning of a male connector, or of a reusable type in which the wiping tip is repeatedly used to dean a male connector through washing with water or the like and drying after cleaning of a male connector.
While there is no limitation on the field of use of the present invention, the present invention can be preferably used as a cleaning tool for a male connector including a male member, and an outer cylinder provided with a female thread. In particular, the present invention is suitable as a cleaning tool for a male connector arranged at an upstream end of a catheter inserted into the body of a patient in order to carry out enteral nutrition.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019-054556 | Mar 2019 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2020/009511 | 3/5/2020 | WO | 00 |
