JP2013244268A - Medical needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical needle that prevents wings from closing.SOLUTION: A medical needle 1 includes: a needle tube 2 having a curve part; a hub 3 provided on the base end side of the curve part of the needle tube 2; a pair of openable/closable wings 42 extending on both sides of the hub 3; and locking parts 5 each locking each wing 42 to the hub 3 so as to maintain a state in which the wings 42 are opened.

Description

  The present invention relates to a medical needle.

  Conventionally, a medical solution such as a high calorie infusion is administered into the body through a catheter placed in the body of a patient. The catheter is connected to a subcutaneously implantable port closed with a rubber occlusion member called a septum. When a drug solution is administered, a medical needle is punctured into the septum portion of the port. As such a medical needle, one provided with a wing for grasping or fixing to a skin during use is known (for example, see Patent Document 1).

  The medical needle described in Patent Literature 1 includes a needle tube bent at a right angle and a pair of wings provided on both sides of the base of the needle tube, and the wings can be bundled with a band in a state where the wings are closed. It is configured. According to such a configuration, since the medical needle having the wings can be formed into a flat shape, the medical needle can be easily packaged and a compact packaging can be achieved.

Japanese Utility Model Publication No. 4-95045

By the way, when using a medical needle, after puncturing the medical needle while grasping a closed wing, the wing is opened and the wing is fixed to the skin with a tape or the like.
However, since medical needles are sterilized and packaged such as EOG (Ethylene Oxide Gas) sterilization with the wings closed, so-called folds are often attached to the wings. For this reason, when the medical needle is punctured and fixed with a tape or the like, the wing is gradually closed from the open state, which makes it difficult to fix. In addition, there is a problem that the fixed state by the tape or the like is released due to this phenomenon even during use of the medical needle.

  The objective of this invention is providing the medical needle | hook which can prevent that a wing | blade closes.

  The medical needle of the present invention includes a needle tube having a bent portion, a hub provided on a proximal end side of the bent portion of the needle tube, a pair of wings extending on both sides of the hub and capable of opening and closing, and the pair In order to maintain the open state of the wings, the wings are provided with locking portions for locking the wings to the hub.

  According to the present invention, since the locking portion for locking each wing to the hub is provided, each wing is attached to the hub in a state where a pair of wings that can rotate with respect to the hub are opened around the hub. Can be locked. For this reason, the state where the wing of the medical needle is open can be maintained, and the wing can be prevented from closing.

  In the medical needle of the present invention, the locking portion includes a through hole provided in each wing, and an engagement protrusion provided to protrude from the hub and engage with the through hole of each wing. Is preferred.

  According to the present invention, the locking portion is constituted by the through hole provided in each wing and the engaging protrusion provided protruding from the hub. For this reason, since the wing can be locked to the hub only by engaging the engaging protrusion with the through hole, the wing can be easily prevented from closing.

  It is preferable that the medical needle of the present invention includes a wing member having the pair of wings, and the wing member is fixed to the hub.

  According to the present invention, since the wing-like member having a pair of wings is fixed to the hub, each wing can be fixed to the hub only by fixing the wing-like member to the hub. For this reason, the manufacturing process of a medical needle can be simplified.

  In the medical needle of the present invention, it is preferable that the hub includes a support portion that supports the wing member.

  According to the present invention, since the hub includes the support portion, the wing member can be supported by the support portion in a state where the wing member is positioned on the support portion, and each wing can be positioned with respect to the hub. . For this reason, a wing | blade can be more reliably latched to a hub.

  In the medical needle of the present invention, it is preferable that the hub includes a pedestal portion that comes into contact with a patient's skin when the medical needle is used, and the engagement protrusion protrudes from the pedestal portion.

  According to the present invention, since the engaging projection is provided on the pedestal that contacts the skin of the patient, the wing can be locked at a position close to the skin. For this reason, when the wing is opened, the wing can be easily adhered to the skin, so that the wing can be reliably fixed to the skin with a tape or the like.

  The medical needle of the present invention includes a wing-like member having the pair of wings, and the hub is provided on the pedestal portion that contacts the patient's skin when the medical needle is used, and the wing-like member. And the engaging protrusions are provided on both sides of the supporting portion, and are gradually narrowed toward the opposite side of the supporting portion in a plan view as viewed from the protruding direction. Preferably there is.

  According to the present invention, since the engaging protrusion is formed to have a shape that gradually narrows toward the side opposite to the support portion that supports the wing-like member, when the wing is closed, the through-hole of the wing is engaged. It can guide to the other side of a support part along the narrow width shape of a projection. For this reason, an engagement protrusion can be easily engaged with a through-hole.

  In the medical needle of the present invention, it is preferable that a proximal end portion of each wing is provided with a groove along a width direction orthogonal to the extending direction of the wing.

  According to the present invention, since the groove is provided in the base end portion of each blade along the width direction of the blade, the bending rigidity of the base end portion can be reduced as compared with the tip portion of the blade. For this reason, since the restoring force which acts on the said wing | blade when opening a wing | blade can be made small, it can prevent reliably that a wing | blade will close.

  In the medical needle of the present invention, it is preferable that a proximal end portion of each wing is provided with a notch in which an end in the width direction perpendicular to the extending direction of the wing is notched.

  According to the present invention, since the notch portion is provided at the base end portion of each blade, the bending rigidity of the base end portion can be reduced compared to the tip portion of the blade. For this reason, since the restoring force of a wing | blade can be made further smaller, it can prevent more reliably that a wing | blade will close.

  In the medical needle of the present invention, it is preferable that the base end portion of each wing is formed thinner than the tip portion of the wing.

  According to the present invention, since the base end portion of each blade is formed thinner than the tip portion, the bending rigidity of the base end portion can be further reduced as compared with the tip portion of the blade, and the blade closes. This can be prevented more reliably.

  In the medical needle of the present invention, one of the pair of wings is provided with a convex portion protruding in the out-of-plane direction of the one wing, and the other wing of the pair is provided with the pair of wings. It is preferable that an engagement recess is provided in which the protrusion engages when the wing is closed.

  According to the present invention, since the projection is provided on one wing and the engagement hole is provided on the other wing, the projection can be engaged with the engagement hole when the wing is closed. For this reason, since wing | blades can be latched, the state which the wing | blade of the medical needle closed can be maintained reliably.

  In the medical needle of the present invention, it is preferable that the wing is made of a material having lower rigidity than a material constituting the hub.

  According to the present invention, since the wing is made of a material having lower rigidity than the hub, the rigidity of the wing can be lowered while ensuring the rigidity of the hub. For this reason, it is possible to reliably support the needle tube with the hub while preventing the blade from closing.

The front view of the medical needle which concerns on 1st Embodiment of this invention. The top view of the medical needle which concerns on 1st Embodiment. The top view of the hub of the medical needle which concerns on 1st Embodiment. The side view of the hub of the medical needle which concerns on 1st Embodiment. The front view which looked at the hub of the medical needle which concerns on 1st Embodiment from the opposite direction of FIG. The top view of the winged member of the medical needle which concerns on 1st Embodiment. The front view of the winged member of the medical needle which concerns on 1st Embodiment. The top view of the winged member of the medical needle which concerns on 2nd Embodiment of this invention. The front view of the winged member of the medical needle which concerns on 2nd Embodiment. The front view of the medical needle which concerns on the modification of this invention. The top view of the medical needle which concerns on the modification of this invention.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
In the second and subsequent embodiments, the same constituent members as those described in the first embodiment and constituent members having the same functions are denoted by the same reference numerals as those in the first embodiment. The description of is omitted or simplified.

[First Embodiment]
As shown in FIGS. 1 and 2, the medical needle 1 according to this embodiment includes a needle tube 2 having a bent portion 21, a hub 3 provided on the proximal end side of the bent portion 21 of the needle tube 2, and a hub 3. The wing-like member 4 having a pair of wings 42 that can be opened and closed, and the pair of wings 42 are locked to the hub 3 in order to maintain the open state around the hub 3. And a locking portion 5 to be provided.
The state where the pair of blades 42 are closed means a state where the surfaces of the blades 42 are in contact with each other, and the state where the blades 42 are open means that the blades 42 are spread and the surfaces of the blades 42 are substantially horizontal. State.

  The needle tube 2 is composed of a tubular needle having a fluid flow path therein, and is bent in a substantially L shape in side view. The needle tube 2 includes a bent portion 21, a proximal end portion 22 on the proximal end side with respect to the bent portion 21, and a distal end portion 23 on the distal end side with respect to the bent portion 21.

  The hub 3 is made of a material such as a resin having a predetermined heat resistance, and is made of polycarbonate in this embodiment. As shown in FIGS. 3 to 5, the hub 3 includes a flat plate-like pedestal portion 31 disposed substantially perpendicular to the distal end portion 23 of the needle tube 2, and one surface of the pedestal portion 31 (the distal end of the needle tube 2. The support portion 32 is provided on the opposite side of the extending direction of the portion 23) and detachably supports the wing-like member 4, and is provided on both sides of the support portion 32 in the pedestal portion 31. A guide portion 33 to be guided, and an engagement protrusion 34 provided on both sides of the support portion 32 and the guide portion 33 in the pedestal portion 31 so as to protrude from the surface 311 and engage with the blade 42 when the blade 42 is opened. The cylindrical tube connecting portion 35 is provided so as to extend from the support portion 32 in the axial direction of the proximal end portion 22 of the needle tube 2 and to which a tube for introducing a chemical solution is connected.

  The support portion 32 protrudes from the one surface 311 of the pedestal portion 31 in the out-of-plane direction, and the distal end portion 321 in the protruding direction is in the width direction of the pedestal portion 31 (the proximal end of the needle tube 2) It is formed in a substantially T-shaped cross section that projects in a direction perpendicular to the extending direction of the portion 22. And the support part 32 is extended in the length direction (extension direction of the base end part 22 of the needle tube 2) of the said base part 31 in the center of the width direction of the base part 31. As shown in FIG. A part of the bent portion 21 and the base end portion 22 of the needle tube 2 is embedded in the support portion 32.

  When the wing member 4 is mounted on the support portion 32 of the hub 3, the guide portion 33 guides the wing member 4 to position the wing member 4 at a predetermined position, and the wing member 4 is detached from the support portion 32. To prevent it. The guide portion 33 protrudes from one surface 311 of the pedestal portion 31 in the out-of-plane direction (the same direction as the protruding direction of the support portion 32), and is parallel to the support portion 32 extending in the length direction of the pedestal portion 31. It is extended to.

  The engaging protrusion 34 is provided so as to protrude from the one surface 311 of the pedestal portion 31 in the out-of-plane direction (the same direction as the protruding direction of the support portion 32 and the guide portion 33). The shape gradually narrows toward the side opposite to 32. Specifically, the engagement protrusion 34 is formed in an isosceles triangle shape with the side surface 341 on the support portion 32 side as a base in a plan view, and the side surface 341 on the support portion 32 side is parallel to the support portion 32. The other two side surfaces 342 are inclined to the opposite side of the support portion 32. The engagement protrusion 34 is provided at a position on the trajectory of a through hole 425 described later when the wing 42 is opened.

  The wing member 4 is made of a material having elasticity and lower rigidity than the material constituting the hub 3, and is made of a polyurethane elastomer in the present embodiment. As shown in FIGS. 6 and 7, the wing member 4 includes a mounting portion 41 mounted on the support portion 32 of the hub 3 and a pair of wings 42 extending on both sides of the mounting portion 41. Removably fixed to.

  The mounting portion 41 includes two side surface portions 411 and 411 and an upper surface portion 412, and is formed in an inverted U-shaped cross section. The inner surface of the mounting portion 41 is shaped to match the outer surface of the support portion 32 of the hub 3. That is, the corner portion 413 that is a boundary portion between the side surface portion 411 and the upper surface portion 412 is formed by being cut out so as to correspond to the shape of the distal end portion 321 of the support portion 32 of the hub 3.

  Each wing 42 extends substantially perpendicularly to the side surface portion 411 of the mounting portion 41 and is formed in a substantially L shape in plan view. That is, each wing 42 extends on both sides of the mounting portion 41. The wing 42 includes a distal end portion 421 and a proximal end portion 422 formed to be thinner than the distal end portion 421. The base end portion 422 includes grooves 423 formed on both surfaces of the base end portion 422 and extending in the width direction orthogonal to the extending direction of the blades 42, and a notch portion in which the end portions in the width direction of the blades 42 are notched. 424 is provided. With such a configuration, the bending rigidity of the base end portion 422 can be lowered compared to the tip end portion 421 of the wing.

  Each blade 42 is provided with a through hole 425 that penetrates the blade 42 in the out-of-plane direction (thickness direction). The through hole 425 is formed corresponding to the shape of the engagement protrusion 34 of the hub 3. The through hole 425 and the engagement protrusion 34 of the hub 3 constitute the locking portion 5 (FIGS. 1 and 2). Furthermore, one wing 42 is provided with a convex portion 426 that protrudes in the out-of-plane direction of the one wing 42, and the convex portion 426 engages with the other wing 42 when these wings 42 are closed. An engagement recess 427 is provided.

  In addition, as shown in FIG. 7, the pair of wings 42 of the present embodiment have their respective base end portions 422 extending slightly inclined toward the upper surface portion 412 side. For this reason, when each wing | blade 42 is not latched by the hub 3, the pair of wing | blade 42 does not become horizontal, but the state expanded toward the direction opposite to the front-end | tip part 23 of the needle tube 2 (FIG. 1 is a state located between a position indicated by a solid line and a position indicated by a one-dot chain line).

  The above medical needle 1 is packaged in a state where the pair of wings 42 are closed, as indicated by a one-dot chain line in FIG. By closing the wing 42, the medical needle 1 can be made to have a flatter shape, so that the medical needle 1 can be easily packaged and a compact packaging can be achieved. At this time, since the convex portion 426 of one wing 42 is engaged with the engagement concave portion 427 of the other wing 42, the state where the wing 42 is closed can be reliably maintained.

  On the other hand, when administering a medical solution, the user takes out the medical needle 1 from the package, punctures the medical needle 1 while grasping the closed wing 42, and attaches the base 31 of the hub 3 to the patient's skin. Make contact. Then, as shown by a solid line in FIG. 1, the user opens the pair of blades 42, engages the engagement protrusions 34 of the hub 3 with the through holes 425 of the blades 42, and then attaches the blades 42 with a tape or the like. It is fixed to the skin and left in place, and the drug solution is administered. After completing the administration of the drug solution, the tape is removed, the wing 42 is closed again, and the medical needle 1 is removed while holding the wing 42.

  Here, since each wing | blade 42 of this embodiment is sterilized and packaged, such as EOG (Ethylene Oxide Gas) sterilization, in the closed state, there exists a fold. For this reason, in a state where the blade 42 is opened, a restoring force in the direction of closing the blade 42 acts on the blade 42. However, since the engaging protrusion 34 of the hub 3 is engaged with the through hole 425 of the blade 42, a frictional force is generated between the engaging protrusion 34 and the through hole 425, and this frictional force is applied to the blade 42. The action of the wing 42 trying to close against the restoring force acting is restricted. That is, the engagement protrusion 34 and the through hole 425 maintain the blade 42 in an open state by engaging with each other. For this reason, it can prevent that the wing | blade 42 closes gradually with progress of time, and it can prevent that the fixing state by a tape etc. is cancelled | released. Further, since the blades 42 can be prevented from gradually closing from the open state when fixed with tape or the like, the problem that the blades 42 are difficult to fix can be avoided.

According to the above embodiment, the following effects are obtained.
That is, since the medical needle 1 is provided with the locking portions 5 for locking the wings 42 to the hub 3, the pair of wings 42 that can rotate with respect to the hub 3 open around the hub 3. In this state, each blade 42 can be locked to the hub 3. For this reason, the state where the wing 42 of the medical needle 1 is open can be maintained, and the wing 42 can be prevented from closing.

  The locking portion 5 is configured by the through-hole 425 provided in each blade 42 and the engaging protrusion 34 provided protruding from the hub 3. For this reason, the wings 42 can be locked to the hub 3 simply by engaging the engagement protrusions 34 with the through holes 425, so that the wings 42 can be easily prevented from closing.

  In addition, since the wing member 4 having a pair of wings 42 is fixed to the hub 3, each wing 42 can be fixed to the hub 3 simply by fixing the wing member 4 to the hub 3. For this reason, the manufacturing process of the medical needle 1 can be simplified.

  Further, since the hub 3 includes the support portion 32, the wing-like member 4 can be supported by the support portion 32 in a state where the wing-like member 4 is positioned on the support portion 32. It can be carried out. For this reason, the wing | blade 42 can be more reliably latched to the hub 3. FIG.

  Moreover, since the engaging protrusion 34 is provided in the base part 31 contact | abutted to a patient's skin, the wing | blade 42 can be latched in the position close | similar to skin. For this reason, when the wing 42 is opened, the wing 42 can be easily adhered to the skin, so that the wing 42 can be reliably fixed to the skin with a tape or the like.

  Further, since the engagement protrusion 34 has a shape gradually narrowing toward the side opposite to the support portion 32 that supports the wing member 4, when the wing 42 is closed, the through hole 425 of the wing 42 is formed. The engaging protrusion 34 can be guided to the opposite side of the support portion along the narrow shape. For this reason, the engagement protrusion 34 can be easily engaged with the through hole 425.

  Moreover, since the groove 423 is provided in the base end part 422 of each wing | blade 42 along the width direction of the said wing | blade 42, compared with the front-end | tip part 421 of the wing | blade 42, the bending rigidity of the base end part 422 can be made low. it can. For this reason, since the restoring force which acts on the said wing | blade 42 when the wing | blade 42 is opened can be made small, it can prevent reliably that the wing | blade 42 will close.

  Further, since the notch portion 424 is provided in the base end portion 422 of each blade 42, the bending rigidity of the base end portion 422 can be made lower than that of the tip end portion 421 of the blade 42. For this reason, since the restoring force of the wing | blade 42 can be made still smaller, it can prevent more reliably that a wing | blade will close.

  Further, since the base end portion 422 of each blade 42 is formed thinner than the tip end portion 421, the bending rigidity of the base end portion 422 can be further reduced as compared with the tip end portion 421 of the blade 42, and the blade 42 can be It can prevent more reliably that it closes.

  Moreover, since the convex part 426 is provided in one wing | blade 42 and the engagement recessed part 427 is provided in the other wing | blade 42, when the wing | blade 42 is closed, the convex part 426 is engaged with the engaging recessed part 427. Can do. For this reason, since the wing | blades 42 can be latched, the state where the wing | blade 42 of the medical needle 1 was closed can be maintained reliably.

  Further, since the blades 42 are made of a material having lower rigidity than the hub 3, it is possible to reduce the rigidity of the blades 42 while ensuring the rigidity of the hub 3. For this reason, the needle tube 2 can be reliably supported by the hub 3 while preventing the blades 42 from being closed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 8 and 9, the medical needle 1 of the present embodiment includes a position of the groove 423 in the wing 42, a point where the wing 42 is not provided with the notch 424, and a shape of the through hole 425 </ b> A of the wing 42. However, each differs from the first embodiment.

  Specifically, the groove 423 is formed on the surface 428 of the blade 42 facing the pedestal 31 of the hub 3, and is not formed on the surface 429 opposite to the surface 428. That is, the groove 423 is formed only on the outer surface 428 when the wing 42 is closed.

On the other hand, in the through hole 425A, the peripheral edge on the opposite side of the mounting portion 41 in a plan view is formed in a waveform. Accordingly, when the engagement protrusion 34 engages with the through hole 425A, the through hole 425A can be easily deformed, and thus each blade 42 can be easily locked to the hub 3.
The above-described embodiment also has the same effect as that of the first embodiment.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the wing 42 is fixed to the hub 3 by fitting the wing-like member 4 to the support portion 32 of the hub 3, but the hub 3 and the wing 42 may be molded integrally. . That is, the wing 42 may be configured to extend directly from the support portion 32 of the hub 3.

In the embodiment, the locking portion 5 is configured by the through holes 425 and 425A provided in the blade 42 and the engagement protrusion 34 provided in the hub 3. However, the locking portion 5 is provided only in one of the hub and each blade. It is good also as a provided structure. For example, as shown in FIGS. 10 and 11, locking portions 5 </ b> A that protrude in the out-of-plane direction from the four corners of one surface 311 of the base portion 31 of the hub 3 are provided, and a blade 42 is interposed between the locking portions 5 </ b> A. Each blade 42 may be locked to the hub 3 by fitting. On the contrary, such a locking portion 5A may be provided on the wing 42, and the hub 3 may be fitted between the locking portions 5A.
In the above-described embodiment, the through-holes 425 and 425A are provided in the blade 42, and the engagement protrusion 34 is provided in the hub 3. However, the engagement protrusion 34 protruding from the blade 42 is provided in the blade 42, and the through-hole is formed in the hub 3. May be provided.

  In the above-described embodiment, the engagement protrusion 34 is formed in an isosceles triangle shape. However, the shape of the engagement protrusion 34 is not limited to this. For example, the opposite side of the support portion 32 in a plan view viewed from the protruding direction. A semicircular shape in which an arc portion is located, a circular shape, or a rhombus shape may be used.

In the above-described embodiment, the notches 424 are provided at both ends in the width direction of the wing 42. However, the notches 424 may be provided only at one end.
In the first embodiment, the grooves 423 are provided on both surfaces of the base end portion 422 of the wing 42. However, the grooves 423 may be provided only on one surface as in the second embodiment.

  The present invention can be used for any medical needle having a wing.

DESCRIPTION OF SYMBOLS 1 Medical needle 2 Needle tube 3 Hub 4 Wing-like member 5 Locking part 21 Bending part 34 Engagement protrusion 42 Wing 422 Base end part 423 Groove 424 Notch part 425 Through-hole

Claims (11)

A needle tube having a bent portion;
A hub provided on the proximal end side of the bent portion of the needle tube;
A pair of wings extending on both sides of the hub and freely openable and closable;
In order to maintain the pair of wings in an open state, the medical needle is provided with a locking portion for locking each wing to the hub. The medical needle according to claim 1, wherein
The locking portion is
Through holes provided in each wing;
A medical needle characterized by including an engaging protrusion that protrudes from the hub and engages with a through hole of each wing. The medical needle according to claim 2,
A wing-like member having the pair of wings,
The medical needle, wherein the wing-like member is fixed to the hub. The medical needle according to claim 3,
The medical needle according to claim 1, wherein the hub includes a support portion for supporting the wing-like member. The medical needle according to any one of claims 2 to 4,
The hub includes a pedestal that contacts the patient's skin when the medical needle is used,
The medical needle according to claim 1, wherein the engaging protrusion protrudes from the pedestal portion. The medical needle according to claim 2,
A wing-like member having the pair of wings,
The hub is
A pedestal that contacts the patient's skin when using the medical needle;
A support portion provided on the pedestal portion and supporting the wing-like member;
The engagement protrusion is provided on both sides of the support portion, and has a shape that gradually narrows toward the opposite side of the support portion in a plan view as viewed from the protruding direction. . The medical needle according to any one of claims 1 to 6,
A medical needle characterized in that a groove is provided in a base end portion of each wing along a width direction orthogonal to the extending direction of the wing. The medical needle according to any one of claims 1 to 7,
A medical needle, characterized in that a proximal end portion of each wing is provided with a notch in which an end in the width direction perpendicular to the extending direction of the wing is notched. The medical needle according to any one of claims 1 to 8,
A medical needle characterized in that a base end portion of each wing is formed thinner than a tip end portion of the wing. The medical needle according to any one of claims 1 to 9,
One wing of the pair is provided with a convex portion protruding in the out-of-plane direction of the one wing,
The medical needle according to claim 1, wherein the other wing of the pair is provided with an engagement recess that engages the projection when the pair of wings are closed. The medical needle according to any one of claims 1 to 10,
The medical needle, wherein the wing is made of a material having lower rigidity than a material constituting the hub.

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