JP2011092397A - Tubular member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular member which permits a difference in grade to be easily confirmed. <P>SOLUTION: The tubular member 1a receives a smaller diameter ring member fitted into the tip side inside periphery. The member has a fitting portion 2 on the inside periphery and grants a visually recognizable shape 4 to the fitting portion 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tubular member such as a needle base, a catheter connector, or the like to which another tubular member having a small diameter is fitted by a distal end portion.

  In a tubular member used to distribute liquid in the field of medical instruments and the like, another tubular member having a smaller diameter is fitted into the fitting portion provided on the inner peripheral surface on the distal end side, so that the diameter is mutually reduced. Two different tubular members may be joined.

  For example, the needle base is joined to the needle tube via the adhesive by fitting a needle tube having an outer peripheral surface coated with an adhesive to a fitting portion provided on the inner peripheral surface on the distal end side. (For example, refer to Patent Document 1). In addition, a connector for a tube such as a catheter is formed by fitting a tube coated with an adhesive on the outer peripheral surface to a fitting portion provided on the inner peripheral surface on the distal end side. Joined with.

  Here, many of the needle tubes and tubes have a fine outer diameter, for example, 0.7 to 0.9 mm (22 to 20 G (gauge)) for a needle tube of an injection needle, and 0.80 for a needle tube of a vein indwelling needle. -0.97 mm (22-20 G (gauge)). The tube outer diameter of the suction catheter is 2.0 to 3.33 mm (6 to 10 Fr. (French size)).

  On the other hand, the needle base and the inner peripheral surface of the connector to which the needle tube and tube are fitted also have a diameter corresponding to the outer diameter.

  The tubular member such as the needle base and the connector is distinguished by expressing the diameter of the inner peripheral surface by a grade such as a gauge or a French size. Of course, it is difficult to distinguish even using devices such as cameras. Therefore, in the injection needle and the vein indwelling needle, the needle base is color-coded by a predetermined color code so that it can be distinguished for each grade.

Japanese Utility Model Publication No. 55-78344

  However, since the color coding is not performed on the tubular member that does not appear outside as a product, there is a disadvantage that it cannot be confirmed that members of different grades are mixed when fitting smaller diameter tubular members in the manufacturing process. . Examples of the tubular member that does not appear outside as the product include an inner needle base of a winged needle for the purpose of preventing erroneous puncture. When the inner needle group is not of a corresponding grade with respect to an inner needle of a specific grade, the inner needle group may drop off or become clogged due to poor adhesion, resulting in a defective product.

  Therefore, an object of the present invention is to provide a tubular member that eliminates such inconvenience and can easily confirm the difference in grade.

  In order to achieve such an object, it is conceivable to give the tubular member a different outer shape depending on the grade so that the outer shape can be visually identified. However, in some cases, the tubular member may be incorporated into a product. In this case, in order to avoid interference with other members, the outer shape is preferably the same regardless of the grade. There are difficulties to do.

  Accordingly, the present invention provides a tubular member in which a smaller-diameter annular member is fitted to the inner peripheral surface on the distal end side, and includes a fitting portion on the inner peripheral surface, and the fitting portion is visually identifiable. It is characterized by being given a shape.

  According to the tubular member of the present invention, since the identifiable shape is given, even if different grades are mixed, it can be visually identified by visual observation or a camera. According to the tubular member of the present invention, since the shape is provided in the fitting portion provided on the inner peripheral surface of the tubular member, the tubular member is identified without changing the outer shape of the tubular member. be able to.

  In the tubular member of the present invention, the identifiable shape is provided in a polygonal rectangular tube section, a plurality of ribs, a knurled shape, and a distal end surface of the fitting portion provided at the distal end portion of the fitting portion. It can be set as 1 type of shape selected from the group which consists of the groove part formed. The tubular member of the present invention may have a different shape for each grade. Moreover, the tubular member of the present invention may change the number of apex angles of the polygon for each grade when the shape is the square tube portion provided at the tip of the fitting portion. When the rib is provided at the tip of the fitting portion, the number of the rib may be changed for each grade. Furthermore, when the said shape is the said groove part with which the said shape was provided in the front end surface of the said fitting part, you may change the number of this groove part for every grade.

  Moreover, the tubular member of this invention WHEREIN: The said fitting part may be provided with the taper part which expands gradually toward a front end side from a base end side. When the tubular member of the present invention includes a tapered portion, the identifiable shape may be a circumferential step provided in the middle of the tapered portion. The circumferential stepped portion may be a protruding portion that protrudes from the surface of the tapered portion, or may be a groove portion that is formed in the tapered portion.

  In the tubular member of the present invention, when the shape is the circumferential step provided in the tapered portion, the number of the step may be changed for each grade. Further, when the shape of the tubular member of the present invention is different for each grade, it is different for each grade by combining the circumferential stepped portion with the square tube portion, rib, knurled shape, and groove portion. It may be used as one of the shapes.

(A) is sectional drawing which shows 1st Embodiment of the tubular member of this invention, (b) is a front view of (a). (A) is sectional drawing which shows 2nd Embodiment of the tubular member of this invention, (b) is a front view of (a). (A) is sectional drawing which shows 3rd Embodiment of the tubular member of this invention, (b) is a front view of (a). (A) is sectional drawing which shows 4th Embodiment of the tubular member of this invention, (b) is a front view of (a). (A) is sectional drawing which shows 5th Embodiment of the tubular member of this invention, (b) is a front view of (a). (A) is sectional drawing which shows the modification of 5th Embodiment of the tubular member of this invention, (b) is a front view of (a).

  Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

  The tubular member of the present embodiment is an inner needle base of a winged needle for the purpose of preventing erroneous puncture, and the outer needle and the outer needle base are in a state where the inner needle is fitted and joined to the inner peripheral surface on the distal end side. Is interpolated. Since the inner needle group does not appear outside as a product, it is not color-coded by a color code. As a result, in the manufacturing process, when an inner needle of a specific gauge is fitted, if an inner needle group of another gauge other than the gauge corresponding to the inner needle is mixed, it is difficult to identify the inner needle group. .

  Therefore, as shown in FIG. 1 (a), the tubular member of the present embodiment has an inner needle (not shown) as a smaller-diameter tubular member fitted to the inner peripheral surface on the distal end side (arrow direction). The needle base 1a includes a fitting portion 2 on the inner peripheral surface. The fitting portion 2 includes a proximal end side taper portion 3 and a square tube portion 4 connected to the distal end side of the taper portion 3. The inner needle is fitted to the taper portion 3 with an adhesive applied to the outer peripheral surface, and the taper portion 3 also serves as an adhesive reservoir. The inner needle base 1a can be identified by the fact that the square tube portion 4 has a regular hexagonal cross-sectional shape as shown in FIG.

  Further, in FIG. 1, the square tube portion 4 having a regular hexagonal cross section is shown, but the cross sectional shape of the square tube portion 4 may be another polygonal shape such as a regular octagonal shape or a regular decagonal shape. . In this case, for example, if the outer diameter of the inner needle is 22G, a regular hexagonal shape, if it is 21G, a regular octagonal shape, if it is 20G, a regular decagonal shape, a polygonal apex in the cross-sectional shape of the square tube portion 4 is used. The number of corners may vary depending on the gauge grade.

  Moreover, as shown to Fig.2 (a), it may be set as the inner needle base 1b provided with the some rib 5 instead of the square cylinder part 4 shown in FIG. The inner needle base 1b can be identified from the fact that the number of ribs 5 is four as shown in FIG.

  2 shows an example in which the number of ribs 5 is four, the number of ribs 5 may be six, eight, or the like. In this case, for example, if the outer diameter of the inner needle is 22G, the number of ribs 5 may be different depending on the gauge grade, such as 4 if 21G, 6 if 21G, and 8 if 20G. Good.

  Moreover, as shown to Fig.3 (a), it may be set as the inner needle base 1c provided with the knurled shape 6 instead of the square cylinder part 4 shown in FIG. The inner needle base 1c can be identified by the knurled shape 6 as shown in FIG. 3B when viewed from the tip side or with a camera.

  Moreover, as shown to Fig.4 (a), it may be set as the inner needle base 1d provided with the some groove part 7 in the front end surface 2a of the fitting part 2 instead of the square cylinder part 4 shown in FIG. The inner needle base 1d can be identified from the fact that the number of the groove portions 7 is four as shown in FIG.

  4 shows an example in which the number of the groove portions 7 is four, the number of the groove portions 7 may be five, six, or the like. In this case, for example, if the outer diameter of the inner needle is 22G, the number of the groove portions 7 may be different depending on the gauge grade, such as 4 pieces for 21G, 5 pieces for 21G, and 6 pieces for 20G. Good.

  Further, the inner needle base 1d includes the arc-shaped groove portion 7 as shown in FIG. 4B, but the shape of the groove portion is not limited to the arc shape, and is formed radially on the distal end surface 2a. May be.

  Furthermore, as shown in FIG. 5 (a), instead of the rectangular tube portion 4 shown in FIG. 1, an inner needle base 1e having a stepped portion made of a circumferential protrusion 8 protruding from the surface in the middle of the tapered portion 3 is used. Also good. The inner needle base 1e can be identified by the presence of the circumferential protrusion 8 in the middle of the tapered portion 3 as shown in FIG.

  5 shows an example in which the number of the circumferential protrusions 8 is one, the number of the circumferential protrusions 8 may be two, three, or the like. In this case, the number of the circumferential protrusions 8 varies depending on the gauge grade, for example, one if the outer diameter of the inner needle is 22G, two if 21G, and three if 20G. It may be.

  Further, as shown in FIGS. 6 (a) and 6 (b), an inner needle base 1f provided with a circumferential groove 9 may be used instead of the circumferential protrusion 8 shown in FIG. An effect can be obtained.

  In the present embodiment, the number of apex angles of the polygon in the cross-sectional shape of the square tube portion 4, the number of ribs 5, the number of grooves 7, the circumferential protrusion 8 or the circumferential groove 9 according to the gauge grade. However, the shape provided in the fitting portion 2 may be different. In this case, for example, if the outer diameter of the inner needle is 22G, the square tube portion 4 can be a knurled shape 6 if it is 21G, and the circumferential protrusion 8 if it is 20G.

  Further, the circumferential protrusion 8 or the circumferential groove 9 may be used in combination with the rectangular tube 4, the rib 5, the knurled shape 6, and the groove 7. In this way, a wider variety of identifications can be made possible.

  In the present embodiment, the case where the fitting portion 2 includes the tapered portion 3 is described. However, the tapered portion 3 may not be provided except in the case of the inner needle bases 1e and 1f. Further, in the present embodiment, the case where the tubular member is the inner needle base 1a to 1f is described, but the tubular member is fitted with a smaller-diameter annular member fitted to the inner peripheral surface on the distal end side. Other tubular members such as an injection needle having a luer taper portion, an indwelling needle placed on the patient's body surface, or a connector of a tube of a suction catheter may be used as long as it has a joint portion.

  1 ... 1a, 1b, 1c, 1d, 1e, 1f ... inner needle base, 2 ... fitting part, 3 ... taper part, 4 ... square tube part, 5 ... rib, 6 ... knurled shape, 7 ... groove part, 8 ... circumferential shape Projection, 9 ... circumferential groove.

Claims (4)

  In a tubular member in which a smaller-diameter annular member is fitted to the inner peripheral surface on the distal end side, the inner peripheral surface is used as a fitting portion, and the fitting portion is provided with a visually identifiable shape. A tubular member characterized by the above.   2. The tubular member according to claim 1, wherein the identifiable shape includes a polygonal rectangular tube portion in cross-sectional view provided at a distal end portion of the fitting portion, a plurality of ribs, a knurled shape, and a distal end surface of the fitting portion. A tubular member having a shape selected from the group consisting of groove portions provided in the above.   3. The tubular member according to claim 1, wherein the fitting portion includes a tapered portion that gradually increases in diameter from the proximal end side toward the distal end side.   4. The tubular member according to claim 3, wherein the identifiable shape is a circumferential step provided in the middle of the tapered portion.

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