JP5910138B2 - Needle assembly - Google Patents

Description

  The present invention relates to a needle assembly.

  For needles that puncture needle assemblies and subcutaneous implantable catheter access ports, medical staff and patients themselves may inadvertently puncture the unintended part of the needle after use at the time of puncture, withdrawal after use, or disposal. Is a problem. Further, there is a possibility that a body fluid containing an infection source is attached to the used needle, and the body fluid attached to the lumen of the needle or the needle tip may be scattered to cause infection. Various methods for preventing unintended puncture of the needle assembly have been proposed.

  Patent Document 1 describes a medical needle including a needle having an annular protrusion on a needle tube portion, a hub that holds the needle, and a storage member that stores a needle tip of the needle. According to this, the engaged portion that engages with the annular protrusion formed on the needle tube portion is formed on the storage member, and prevents re-exposure of the needle after the needle tip is stored in the storage member, thereby preventing erroneous puncture. It can be prevented.

  Patent Document 2 proposes a needle assembly having a wing that can be folded to prevent contact with the tip of the needle. In the above-described safety type needle assembly, it is possible to prevent erroneous puncture because it is difficult for the fingertip to come into contact with the needle simply by folding the wing.

JP 2010-300 A Japanese translation of PCT publication No. 2004-510555

  However, in the medical needle described in Patent Document 1, since the needle tube has an annular protrusion, there is a possibility that the affected part is spread and the burden is applied to the affected part when puncturing the affected part. Further, the needle assembly of Patent Document 2 locally compresses the patient's skin when the wing is folded by the needle extraction operation. Since the skin of the indwelling portion of the subcutaneously implantable catheter access port that is repeatedly punctured is often weaker than other sites, it is not good to apply a load such as friction or compression as much as possible. Furthermore, since the needle assembly does not have a structure that covers the periphery of the tip of the portion of the needle that contacts the living body, there is a possibility that bodily fluid attached to the needle may come into contact with the human body or be scattered.

  The present invention has been made in view of the above problems, and provides a needle assembly that can prevent exposure of a needle after use and prevent scattering of bodily fluids.

Such an object is achieved by the present invention described in the following (1) to (4) .
(1) A needle body and a needle protection member provided at a proximal end portion of the needle body, the needle protection member having a pair of thin pieces facing each other across the axis of the needle body, At least one of the thin pieces has an engaging portion that engages with the other thin piece around it, and when the engaging portion engages with the other thin piece, the pair of thin pieces form a bag shape and the needle body A needle assembly configured to be housed therein , wherein the needle assembly further includes an engagement assisting member, wherein the engagement assisting member includes a first through hole and the first assembly. A second through hole that intersects the through hole, the needle main body is inserted through the first through hole, the pair of thin pieces are inserted through the second through hole, and the needle main body is pulled up; Accordingly, the pair of thin pieces of the needle protection member is pulled out from the second through hole through the first through hole, and the needle protection member is removed. Engaging portions of the pair of slices of wood, the needle assembly, characterized in that it is configured to engage when passing through the base end portion of the first through hole.
(2) The needle assembly according to (1), wherein each of the pair of thin pieces has an engaging portion that engages with the other thin piece around the pair, and the engaging portions engage with each other.
(3) The engagement portion is a single ridge provided around the thin piece or a double ridge that runs side by side, and the single ridge provided on one of the thin pieces is provided on the other thin piece. The needle assembly according to (2), wherein the needle assembly engages with a groove between the two ridges.
(4) The engaging portion is a plurality of protrusions or annular protrusions provided along the periphery of the thin piece, and the protrusion provided in one of the thin pieces is provided in the other thin piece. The needle assembly according to (2), which engages with a central groove of the protrusion.

  ADVANTAGE OF THE INVENTION According to this invention, the needle | hook assembly which can prevent easily the exposure of the needle | hook after use can be provided by providing the protection member which covers a needle | hook at the base end part of a needle | hook. Moreover, since the protective member holds the needle in a substantially sealed state, it is possible to effectively prevent the infectious liquid from scattering.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the needle assembly which concerns on embodiment of this invention, (a) Front view, (b) Side view. It is a side longitudinal cross-sectional view of the needle assembly which concerns on embodiment of this invention. In the needle assembly which concerns on embodiment of this invention, it is the figure showing each step which covers a needle body with a needle protection member. (A) is IV-IV sectional drawing of FIG. However, the needle body is not shown. (B) is a figure showing the state which canceled the engagement of (a).

Hereinafter, a preferred embodiment of the needle assembly of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall view of a needle assembly according to an embodiment of the present invention, where (a) is a front view and (b) is a side view. FIG. 2 is a longitudinal sectional view of the side. 3 is a view showing each stage of covering the needle body with a needle protection member in the needle assembly according to the embodiment of the present invention, and FIG. 4A is a sectional view taken along the line IV-IV in FIG. It is. However, the needle body is not shown. FIG. 4B is a diagram illustrating a state in which the engagement of FIG.

  The needle assembly 1 of the present embodiment is used for various purposes such as administration of drug solutions and blood collection.

  As shown in FIG. 1, the needle assembly 1 of the present embodiment includes a needle body 2, a needle protection member 3 provided at the proximal end portion of the needle body 2, and a needle body at the proximal end portion of the needle body 2. 2 and an engagement assisting member 4 through which the needle protection member 3 is inserted, and a tube 5 provided at the proximal end portion of the needle body 2.

  The needle body 2 includes a needle tube 21, a needle base portion 24 provided at a proximal end portion of the needle tube 21, and a pulling portion 25 extending from the needle base portion 24. The distal end of the needle tube 21 has a needle tip 22, and a lumen 23 penetrating from the needle tip 22 to the proximal end is formed.

  As shown in FIG. 1A, in the present embodiment, the needle tip 22 is inclined with respect to the axis of the needle tube 21, and the opening of the lumen 23 is oriented in a direction perpendicular to the axis of the needle tube 21. That is, the needle body 2 is a Huber needle. Huber needles are preferred because they are used as needles to pierce subcutaneous implantable catheter access ports and do not cause coring. The shape of the needle tip is not limited to this, and may be any shape such as a straight type according to the purpose of use.

  As shown in FIG. 2, the lumen 23 is formed through the needle tube 21. The distal end side is opened by the needle tip 22, and the proximal end side communicates with the tube 5. Therefore, the medicine or the like administered through the tube 5 is released from the needle tip 22 through the lumen 23.

  As shown in FIGS. 1 and 2, the needle base portion 24 is provided at the proximal end portion of the needle tube 21. The needle base portion 24 is in contact with a base end portion of an engagement assisting member 4 described later, and is integrated with the engagement assisting member 4 via a pulling portion 25. In the present embodiment, the needle base portion 24 has a substantially rectangular parallelepiped shape having the same size as the base end portion of the engagement assisting member 4, but is not limited thereto and may have any shape.

  The pulling unit 25 integrates the needle main body 2 and the engagement assisting member 4 and functions as a gripping unit when the needle main body 2 is removed. In the present embodiment, the pulling portion 25 has a band shape, one end is fixed to the proximal end portion of the needle base portion 24, and the other end is locked to a fastener 44 of the engagement assisting member 4 described later. Locking to the fastener 44 may be performed by any method, for example, a hole may be provided in the other end of the traction portion 25 and the fastener 44 may be inserted and locked. You may lock by. In addition, the shape of the tow | pulling part is not restricted to a strip | belt shape, For example, a string shape or a rod shape may be sufficient.

  Here, examples of suitable materials used for the needle body 2 will be given. As the needle tube 21 and the needle tip 22, any material can be used as long as it is a material normally used for a medical needle. For example, stainless steel is used. Further, as the needle base 24, polyolefin such as polyethylene (PE) or polypropylene (PP), polyvinyl such as polystyrene (PS), polyacryl such as polymethyl methacrylate (PMMA), resin material such as polycarbonate, stainless steel, etc. The metal material can be used. As the pulling portion 25, the same materials as those mentioned as the needle base portion 24 can be used, and natural fibers such as cotton and hemp can also be used.

  An example of dimensions of the needle body 2 according to this embodiment will be described. The needle tube 21 has a diameter of about 0.85 mm to 1.5 mm (17 G to 30 G) and a length of about 5 to 30 mm. The needle tip 22 has a length of about 0.5 to 7 mm and is inclined about 5 to 30 ° with respect to the axis of the needle tube 21. The lumen 23 has a diameter of about 0.3 to 1 mm. Furthermore, the needle base 24 has a length of about 3 to 15 mm, a width of about 3 to 20 mm, and a height of about 2 to 15 mm, and the traction portion 25 has a length of about 4 to 30 mm and a width of about 2 to 10 mm.

  As shown in FIGS. 1 and 2, the needle protection member 3 includes a first thin piece 31 and a second thin piece 32. The first thin piece 31 and the second thin piece 32 each have a band shape, and are fixed to the needle base portion 24 with their surfaces facing each other across the needle tube 21.

  As shown in FIG. 4, the first thin piece 31 has an engaging portion 311 on the surface facing the second thin piece 32. In the present embodiment, the engaging portion 311 is a single ridge that runs above the upper side of FIG. 4B and two ridges that run parallel below the lower side of FIG. In addition, although not shown, a strip is also formed at the lower end of the first thin piece 31 along the circumference.

  Further, the second thin piece 32 has an engaging portion 321 on the surface facing the first thin piece 31. The engaging part 321 is two ridges that run parallel in the upper part of FIG. 4 (b) and one ridge that runs in the lower part of FIG. 4 (b).

  As will be described later, the engaging portion 311 of the first thin piece 31 and the engaging portion 321 of the second thin piece 32 are engaged to form a bag shape, and the needle tube 21 and the needle tip 22 are accommodated therein. That is, the periphery of the first thin piece 31 and the second thin piece 32 is engaged by engaging one groove with the groove between the two opposite stripes. Thereby, the used needle tube 21 and the needle tip 22 are not exposed, and erroneous puncture and scattering of pathogenic body fluid are prevented.

  The engaging portion 311 or the engaging portion 321 may be intermittent instead of a series of ribs in the longitudinal direction as in the present embodiment. That is, a plurality of protrusions and annular protrusions provided along the periphery of the first thin piece 31 or the second thin piece 32 may be used. In this case, the 1st thin piece 31 and the 2nd thin piece 32 can be engaged by engaging with the recessed part of the annular protrusion which a protrusion opposes.

  Here, examples of suitable materials used for the needle tip protecting member 3 will be given. Any material can be used for the first thin piece 31 and the second thin piece 32 as long as they have flexibility. Examples of such materials include polyolefins such as polyethylene (PE) and polypropylene (PP), polyvinyls such as polystyrene (PS), polyacryls such as polymethyl methacrylate (PMMA), and resin materials such as polycarbonate.

  A dimension example of the needle protection member 3 according to this embodiment will be described. The first thin piece 31 and the second thin piece 32 have a length of about 10 to 40 mm and a width of about 3 to 15 mm, respectively. Moreover, the engaging part 311 and the engaging part 321 have a height of about 1 to 4 mm.

  As shown in FIGS. 1 and 2, the engagement assisting member 4 includes an umbrella-shaped main body 41. As will be described later, the engagement assisting member 4 engages the first thin piece 31 and the second thin piece 32 of the needle protection member 3 in conjunction with the removal of the needle body 2.

  The main body 41 has a first through hole 42 penetrating through the central portion. The needle tube 21 is inserted through the first through hole 42. Further, a second through hole 43 is provided so as to be orthogonal to the first through hole 42. The second through hole 43 is formed toward both ends of the engagement assisting member 4 with the first through hole 42 interposed therebetween. The first thin piece 31 and the second thin piece 32 are inserted through the second through holes 43, respectively. Further, the bottom surface of the main body 41 has a substantially spherical round shape.

  The engagement assisting member 4 is provided with a fastener 44. In this embodiment, the fastener 44 is formed at one end of the main body 41 of the engagement assisting member 4 and is constituted by a shaft and a sphere provided at the tip thereof. As described above, the fastener 44 is inserted into the hole provided at the other end of the traction tool 25 so that the needle body 2 and the engagement assisting member 4 are integrated.

  Here, examples of suitable materials used for the engagement assisting member 4 will be given. As the main body 41 and the fastener 44, for example, a polyolefin such as polyethylene (PE) or polypropylene (PP), a polyvinyl such as polystyrene (PS), a polyacryl such as polymethyl methacrylate (PMMA), or a resin material such as polycarbonate. Can be used.

  An example of dimensions of the engagement assisting member 4 according to this embodiment will be described. The main body 41 has an outer diameter of about 10 to 50 mm and a height of about 2 to 10 mm. The first through hole 42 is formed in such a size that the needle tube 21 can be inserted therein, and the second through hole 43 is formed in such a size that the first thin piece 31 and the second thin piece 32 can be inserted therethrough. .

Next, a usage example of the needle assembly according to the present embodiment will be described with reference to FIG.
The needle assembly 1 according to this embodiment is used for puncturing a subcutaneously implantable catheter access port. First, the needle tube 21 is punctured into the septum of the port. At this time, since the needle base 24 and the engagement assisting member 4 are integrated by the pulling portion 25, the needle base 24 and the engagement assisting member 4 can be punctured without being separated even if they are punctured. .

  Then, a desired drug or the like is administered as appropriate. At this time, since the bottom surface of the engagement assisting member 4 is rounded, it is easy to fit to the skin and to fix the needle assembly 1 to the skin.

  The needle extraction is performed by releasing the engagement between the traction portion 25 and the fastener 44 and pulling the traction portion 25 upward. At this time, the engagement assisting member 4 is pressed with one hand, and the pulling portion 25 is pulled up with the other hand. As the needle body 2 is pulled up, the first thin piece 31 and the second thin piece 32 of the needle protection member 3 are pulled out from the second through hole 43 through the first through hole 42, respectively. The engaging portion 311 of the first thin piece 31 and the engaging portion 321 of the second thin piece 32 are engaged when passing through the proximal end portion of the first through hole 42. Therefore, as shown in FIG. 3 (b), when the needle tube 21 is pulled out, the pulled-out portion is stored in the needle protection member 3. When the needle body 2 is all pulled out in this way, the needle tube 21 and the needle tip 22 are stored in the needle protection member 3 as shown in FIG.

  In the needle assembly 1 of the present embodiment, the withdrawal of the needle and the protection of the needle tube 21 are performed at the same time. Therefore, even when pathogenic body fluid is attached to the needle tube 21, the needle tube 21 is already covered when the needle is removed, so there is no fear of scattering of the body fluid. Further, since the needle tip 22 is covered with the needle protection member 3, there is no risk of erroneous puncture.

DESCRIPTION OF SYMBOLS 1 Needle assembly 2 Needle main body 21 Needle tube 22 Needle tip 23 Lumen 24 Needle base 25 Pulling part 3 Needle protection member 31 1st thin piece 311 Engagement part 32 2nd thin piece 321 Engagement part 4 Engagement auxiliary member 41 Main body 42 1st through-hole 43 2nd through-hole 44 Fastener 5 Tube

Claims (4)

A needle body, and a needle protection member provided at a proximal end portion of the needle body,
The needle protection member has a pair of thin pieces facing each other across the axis of the needle body,
At least one of the pair of thin pieces has an engaging portion that engages with the other thin piece around the pair, and when the engaging portion engages with the other thin piece, the pair of thin pieces forms a bag shape. A needle assembly configured to house a needle body therein ,
The needle assembly further includes an engagement assisting member,
The engagement assisting member has a first through hole and a second through hole intersecting the first through hole,
The needle body is inserted through the first through hole, and the pair of thin pieces are inserted through the second through hole,
As the needle body is pulled up, the pair of thin pieces of the needle protection member is pulled out from the second through hole through the first through hole,
The needle assembly according to claim 1, wherein the engaging portion of the pair of thin pieces of the needle protection member is configured to engage when passing through the proximal end portion of the first through hole .   The needle assembly according to claim 1, wherein each of the pair of thin pieces has an engaging portion that engages with the other thin piece around the pair of thin pieces, and the engaging portions engage with each other.   The engaging portion is a single ridge provided around the thin piece or a two-piece ridge running side by side, wherein the single ridge provided on one of the thin pieces is provided on the other thin piece. The needle assembly of claim 2, wherein the needle assembly engages a groove between the two ridges. The engaging portion is a plurality of protrusions or annular protrusions provided along the periphery of the thin piece, and the protrusion provided on one thin piece is the center of the annular protrusion provided on the other thin piece. The needle assembly of claim 2, wherein the needle assembly is engaged with a groove of the needle.

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