JP5140564B2 - Medical needle - Google Patents

Description

  The present invention relates to a medical needle.

  Conventionally, as a needle for puncturing a subcutaneously implantable catheter access port, a curved needle having a curved portion curved at a predetermined angle (for example, 90 degrees), a telescopic portion that expands and contracts like a pantograph, and a curved needle are passed. A medical needle provided with a plate-like member having a passage portion is known (for example, see Patent Documents 1 and 2). One end of the expansion / contraction part is connected to a base part provided on the proximal end side of the curved needle, and the other end of the expansion / contraction part is connected to a plate-like member.

According to the conventional medical needle, since the above-described expansion / contraction part is provided, when the bending needle is pulled out from the patient's skin (access port), the bending needle (the tip part) can be covered by the expansion / contraction part. it can. For this reason, an accident (a so-called false puncture) in which a person who uses a medical needle (including a medical worker and a patient himself / herself, hereinafter referred to as a user) accidentally stabs a medical needle after use by himself / herself Can be prevented.
Moreover, according to the conventional medical needle, since the plate-shaped member described above is provided, when the curved needle is pulled out from the patient's skin, the upper surface of the plate-shaped member (the surface not in contact with the patient's skin) is raised. The curved needle can be pulled out relatively smoothly by pressing from the side.

JP 2002-369984 A JP 2006-61379 A

  Incidentally, in recent years, there has been an increasing demand for maintaining the stretchable portion in an extended state (hereinafter sometimes referred to as an “extended state”) after the curved needle is removed from the patient's skin. This is because the distal end portion of the curved needle may be exposed from the stretchable portion (plate-like member) if the stretched state of the stretchable portion is released when the user does not intend. If the tip of the curved needle is exposed from the expansion / contraction part (plate-like member), a false puncture may occur.

  Therefore, the present invention has been made in view of such circumstances, and provides a medical needle capable of continuing to maintain the stretchable portion in an expanded state after the curved needle is removed from the patient's skin. For the purpose.

[1] The medical needle of the present invention includes a curved needle (10) having a curved portion (14) curved at a predetermined angle, a base (20) in which a part of the curved needle (10) is implanted, A telescopic part (30) provided on the base part (20) and configured to be stretchable in the first (z) direction along the distal end part (16) of the curved needle from the curved part (14); A plate-like member (60) that is connected to the opposite side of the base (20) of the part (30) and has a passage part (62) that allows the curved needle (10) to pass therethrough; ), The length along the first (z) direction when the stretchable part (30) is most extended is equal to or longer than the length from the distal end part (16) of the curved needle to the curved part (14). An elastic member configured to be, and further expandable and contractable in a pantograph shape, wherein the curved needle 10) with the first elastic member (32) and the second elastic member (36) arranged opposite to each other, and the hook portion arranged on one side of the first and second elastic members (32, 36). (40) and the hook part (32, 36) disposed on the other side of the first and second elastic members (32, 36), when the first and second elastic members (32, 36) are extended. 40) is disposed in the vicinity of the notch (42) and the notch (42), and the hook (40) is engaged with the notch (42). And a pressing member (46) having a function of pressing the hook portion (40) toward the notch portion (42).

For this reason, according to the medical needle of the present invention, since the hook portion and the notch portion described above are provided, the first and second extendable members are extended and the hook portion is locked to the notch portion. Thereby, it becomes possible to continue maintaining the extended state of the first and second elastic members.
Therefore, the medical needle of the present invention is a medical needle capable of maintaining the expansion / contraction portions (first and second expansion / contraction members) in the expanded state after the curved needle is removed from the patient's skin. .

  In addition, according to the medical needle of the present invention, since the above-described pressing member is provided, the engagement force between the hook portion and the notch portion can be further increased. For this reason, it becomes possible to maintain the expansion | extension state of a 1st and 2nd expansion-contraction member with a stronger engaging force.

  In addition, according to the medical needle of the present invention, the manufacturing cost is not so high because it is constituted by a relatively simple member including a hook portion, a notch portion, and a pressing member.

  Further, according to the medical needle of the present invention, the length along the first direction when the first and second elastic members are extended to the maximum is equal to or longer than the length from the distal end portion of the bending needle to the bending portion. Thus, when the curved needle is pulled out from the patient's skin (access port), the curved needle (the tip portion thereof) can be covered by the expansion / contraction part. For this reason, generation | occurrence | production of the erroneous stick by a user can be prevented.

[2] In the medical needle according to [1], the notch (42) includes a first opening end (43) positioned on the base (20) side and the plate-like member (60). A second opening end (44) positioned on the side, and a third opening end (45) connecting the first opening end (43) and the second opening end (44), and the pressing member (46) The one end (47) is connected to the position near the first opening end (43), and the other end (48) extends from the first opening end (43) toward the second opening end (44). The claw-shaped pressing member is preferably configured such that a predetermined space (P) is formed between the other end (48) and the second opening end (44).

  By configuring in this way, a predetermined space is formed between the other end of the claw-shaped pressing member and the second opening end of the notch, so that the space is not formed (that is, the pressing member Compared with the case where both ends are connected to positions near the opening end of the notch portion), the hook portion can be smoothly engaged with the notch portion.

  Further, by configuring as described above, when a force is applied from above the base portion (direction along the first direction) when the first and second elastic members are in the extended state, the end surface of the hook portion is Since it collides with one opening end, it becomes difficult for a hook part to come off from a notch part. At this time, since the other end of the claw-shaped pressing member is configured to extend from the first opening end toward the second opening end, the hook portion is further prevented from coming off from the notch portion. It becomes possible to suppress. As a result, the extended state of the first and second elastic members can be maintained with a stronger engagement force.

[3] In the medical needle according to [1] or [2], the second direction is the same as the direction along the curved portion (14) from the proximal end (12) side portion of the curved needle. In the (y) direction, the hook portions (40, 50), the notches (42, 52), and the pressing members (46, 56) are respectively connected to the first and second elastic members (32, It is preferable that they are disposed on both the second (y) direction front surface and the second (y) direction rear surface in 36).

  By comprising in this way, it is made to engage by a hook part and a notch part from both the 2nd direction near side and back side in a 1st and 2nd expansion-contraction member, and the engaging force is heightened by the pressing member. Therefore, it is possible to continue to maintain the extended state of the first and second elastic members with a stronger engagement force.

  In addition, when each of a hook part, a notch part, and a pressing member is arrange | positioned on both surfaces of the surface of the 1st and 2nd expansion-contraction member in the 2nd direction near side and the 2nd direction back | inner side, (A ) A notch and a pressing member are arranged on both the front surface and the back surface in the second direction of the first elastic member, and both the front surface and the back surface of the second elastic member in the second direction. (B) The first hook portion is disposed on the front surface in the second direction of the second elastic member, and the front surface of the first elastic member is disposed on the front surface in the second direction. A first cutout portion and a first pressing member corresponding to the first hook portion are disposed, a second hook portion is disposed on the back surface in the second direction of the first stretchable member, and a second stretchable member The second notch corresponding to the second hook portion on the back surface in the second direction And the second pressing member may be disposed.

[4] In the medical needle according to any one of [1] to [3], the wing portion is provided on the base (20) and is configured to be rotatable about the base (20) as a central axis. (170), and the wing portion (170) is a cover to which the hook portions (40, 50) are locked when the first and second elastic members (32, 36) are folded. The locking portion (175, 176) has the locking portion (175, 176) in which the first and second elastic members (32, 36) of the wing portion (170) are folded. In the state, it is disposed at a position corresponding to the position of the hook part (40, 50) and is engaged with the hook part (40, 50) by rotating the wing part (170). It is preferable that it is comprised so that cancellation | release is possible.

  By comprising in this way, it becomes possible to continue maintaining the state by which the 1st and 2nd expansion-contraction member was folded. For example, even when a force to try to expand the first and second elastic members (force to open the elastic part) is generated when a curved needle is punctured into the patient's skin, According to the medical needle of the invention, it is possible to suppress such a force to extend by locking the hook portion to the locked portion. Therefore, the medical needle of the present invention is a medical needle that can be stably punctured on the skin of a patient.

  In addition, since the locked portion is configured to be able to release the engaged state with the hook portion by rotating the wing portion, the locked portion can be moved with a simple action of “pinch the wing portion”. It is possible to release the engagement state with the hook portion.

[5] In the medical needle according to any one of [1] to [3] above, the wing part (70) provided on the base part (20) and the expandable part (30) are folded. A needle cover member (80) that holds the wing (70) and the plate member (60) and covers the curved needle (10), and the needle cover member (80) includes the first cover member (80). A predetermined clearance is provided at a position corresponding to at least one of the hook portion (40) and the pressing member (46) when the first and second elastic members (32, 36) are folded. It is preferable that

Before using the medical needle (before puncturing the patient's skin), a compact medical needle is required while ensuring safety. Here, when the first and second elastic members are folded, the size of the entire medical needle can be reduced, while the curved needle (the distal end portion) cannot be covered by the elastic portion. Further, when the first and second extendable members are extended, the curved needle (the tip thereof) can be covered by the first and second extendable members, while the size of the entire medical needle is relatively large. It becomes a thing.
According to the medical needle of the present invention, before using the medical needle, the curved needle, the first and second elastic members, and the plate-like member are folded in the needle cover member in a state where the first and second elastic members are folded. Therefore, safety can be ensured with the first and second elastic members folded. That is, the medical needle of the present invention is a compact medical needle while ensuring safety.

In addition, since the needle cover member is provided with the predetermined clearance described above, when the curved needle, the first and second extendable members, the plate-like member, and the like are stored in the needle cover member, the hook portion and the pressing member Can be prevented from being caught by the needle cover member.
Moreover, since the thickness of the needle cover member other than the portion provided with the clearance can be reduced by configuring as described above, it is possible to contribute to downsizing of the entire medical needle including the needle cover member.

  Note that the reference numerals added in parentheses below the wording of each means described in the claims and in this column (the column for means for solving the problem) indicate the contents described in the claims and this column. It is used for easy understanding, and does not limit the contents described in the claims and in this section.

  Hereinafter, the medical needle of the present invention will be described based on the embodiments shown in the drawings.

[Embodiment 1]
FIG. 1 is a perspective view of a medical needle 1. FIG. 2 is a perspective view of the medical needle 1 when viewed from a direction different from that in FIG. FIG. 3 is a front view of the medical needle 1. FIG. 4 is a rear view of the medical needle 1 (a view of the medical needle 1 viewed from the tube connecting portion 22 side). FIG. 5 is a side view of the medical needle 1. Note that the needle cover member 80 is not shown in FIGS.

  FIG. 6 is a view for explaining how the first and second elastic members 32 and 36 expand and contract. FIG. 6A is a front view of the medical needle 1 when the first and second elastic members 32 and 36 are most folded, and FIG. 6E is the first and second elastic members 32 and 36. FIG. 6B is a front view of the medical needle 1 in a state where the needle is most extended, and FIGS. 6B to 6D are changed from the state shown in FIG. 6A to the state shown in FIG. It is a front view of the medical needle 1 which shows the middle course until.

  FIG. 7 is a view for explaining a state in which the hook portions 40 and 50 are locked to the cutout portions 42 and 52. In FIG. 7, a cross section in the xy plane is schematically shown in the portions of the hook portions 40 and 50, the cutout portions 42 and 52, and the pressing members 46 and 56.

  FIG. 8 is a view for explaining the hook portion 40, the cutout portion 42, and the pressing member 46. FIG. 8A is a partially enlarged view of the cutout portion 42 and the pressing member 46 viewed along the y direction, and FIG. 8B is a view of the cutout portion 42 and the pressing member 46 viewed along the x direction. FIG. 8C is a partially enlarged view of the hook portion 40, the cutout portion 42, and the pressing member 46 viewed along the y direction when the first and second elastic members 32, 36 are in the extended state. It is a partial enlarged view.

  9 and 10 are views for explaining the needle cover member 80. 9A is a front view of the needle cover member 80, FIG. 9B is a side view of the needle cover member 80, and FIG. 9C is a top view of the needle cover member 80. (D) is a bottom view of the needle cover member 80. 10A is a perspective view of the needle cover member 80, and FIG. 10B is a perspective view of the medical needle 1 when the needle cover member 80 is attached.

  In the following description, three directions orthogonal to each other are referred to as an x direction, a y direction, and a z direction, respectively. The x direction is the “third direction”, the y direction is the “second direction”, and the z direction is the “first direction”. The x direction is the same direction as the long side direction of the plate-like member 60, and the y direction is the same direction as the short side direction of the plate-like member 60 (or the same direction as the longitudinal direction of the base portion 20). , Z direction is a direction along the distal end portion 16 from the bending portion 14 of the bending needle 10 (or a direction perpendicular to the surface of the plate-like member 60 on the base portion 20 side).

  As shown in FIGS. 1 to 5, the medical needle 1 according to the first embodiment has a curved needle 10 having a curved portion 14 curved at a predetermined angle (for example, 90 degrees), and a part of the curved needle 10 is implanted. The base 20, the expansion / contraction part 30 provided in the base 20 and configured to be expandable and contractable in a pantograph shape, the plate-like member 60 connected to the opposite side of the expansion / contraction part 30 from the base 20, and the base 20 The provided wing | blade part 70 and the needle cover member 80 (refer FIG.9 and FIG.10) are provided.

  As shown in FIG. 5, the curved needle 10 is punctured into a proximal end portion 12, a curved portion 14 that is curved at, for example, 90 degrees, and an access port (see FIG. 12 described later) that is implanted under the skin of a patient. And a tip portion 16. From the base end portion 12 to the curved portion 14 is a straight tube parallel to the y direction, and from the curved portion 14 to the front of the distal end portion 16 is a straight tube parallel to the z direction. The distal end portion 16 has a slightly bent configuration for preventing coring (perforation of a septum at the access port and generation of scraps).

  The base portion 20 is configured to cover the base end portion 12 and the bending portion 14 of the bending needle 10. The base 20 has a tubular tube connecting portion 22 and is configured to be connectable to a tube (not shown) at the tube connecting portion 22.

  As shown in FIGS. 3 and 4, the expansion / contraction part 30 includes a first expansion / contraction member 32 and a second expansion / contraction member 36 that are opposed to each other with the bending needle 10 therebetween, and a second expansion / contraction member 36 on the near side in the y direction. A hook portion 40 disposed on the surface, a notch portion 42 disposed on the front surface in the y direction of the first elastic member 32, a pressing member 46 disposed in the vicinity of the notch portion 42, and the first expansion and contraction. The hook portion 50 disposed on the back surface in the y direction of the member 32, the notch portion 52 disposed on the back surface in the y direction of the second elastic member 36, and the vicinity of the notch portion 52. And a pressing member 56.

Each of the first and second elastic members 32, 36 has an end connected to the base 20 and the plate-like member 60, and is configured to be able to be bent in a substantially “<” shape at the bent portions 34, 38. (See FIGS. 3 and 4). In addition, each of the first and second elastic members 32 and 36 is configured to be bendable also at a connection portion between each end of the first and second elastic members 32 and 36 and the base 20 and the plate-like member 60. ing. Since the first and second elastic members 32 and 36 configured in this manner are arranged to face each other with the curved needle 10 therebetween, as shown in FIGS. 6A to 6E, in the x direction. It can be expanded and contracted in a pantograph shape so as to widen or narrow along.
The stretchable portion 30 is arranged so that the direction in which the first and second stretchable members 32 and 36 spread is the same as the long side direction of the plate-like member 60 described later.

  As can be seen from FIG. 6 (e), the lengths of the first and second elastic members 32 and 36 along the z direction when the first and second elastic members 32 and 36 are extended to the maximum are the curved needle 10. It is comprised so that it may become more than the length from the front-end | tip part 16 to the curved part 14.

  The tip portions of the hook portions 40 and 50 have a hook shape as shown in FIGS. When the first and second elastic members 32 and 36 are in the extended state (the state shown in FIG. 6 (e)), as shown in FIG. 7, the hook part 40 is locked to the notch part 42, and the hook part 50 is It is locked to the notch 52.

  As shown in FIGS. 8A and 8B, the notch portion 42 includes a first opening end 43 located on the base 20 side, a second opening end 44 located on the plate-like member 60 side, And a third opening end 45 connecting the first opening end 43 and the second opening end 44.

  The pressing member 46 is a claw-shaped pressing member having one end 47 connected to a position near the first opening end 43 and the other end 48 extending from the first opening end 43 toward the second opening end 44. In other words, the claw-shaped pressing member 46 is configured such that the tip (the other end 48) of the claw is directed toward the plate-shaped member 60 when the telescopic portion 30 is extended. The pressing member 46 is configured such that a predetermined space P (see FIG. 8B) is formed between the other end 48 and the second opening end 44.

  The pressing member 46 has a function of pressing the hook portion 40 toward the notch portion 42 when the hook portion 40 is locked to the notch portion 42 (see FIG. 7).

  In addition, after the hook part 40 is completely locked to the notch part 42, the pressing member 46 may be in contact with the hook part 40 or may not be in contact with the hook part 40. That is, after the hook portion 40 is completely locked to the notch portion 42, the pressing member 46 does not necessarily hold the hook portion 40 toward the notch portion 42.

  Since the notch 52 and the pressing member 56 have the same configuration and function as the above-described notch 42 and the pressing member 46, detailed description thereof is omitted.

  As shown in FIGS. 1 and 2, the plate-like member 60 is a substantially rectangular plate-like member, and the corners of the four corners of the rectangle are rounded. The plate-like member 60 is arranged such that its long side is along the x direction and its short side is along the y direction. The plate-like member 60 is formed at a substantially central portion and has a passage portion 62 through which the curved needle 10 passes. The passage part 62 is a slit-like (cut-out) passage part.

  As shown in FIGS. 1 to 4, the wing part 70 is a pair of wing members connected to the side of the base part 20, and includes substantially rectangular gripping parts 72 and 74, the base part 20, and each gripping part. 72 and 74, and thin portions 77 and 78 formed thinner than the grip portions 72 and 74. The grip portions 72 and 74 are configured to be rotatable by a predetermined angle about the connecting portion between the base portion 20 and the thin portions 77 and 78 (FIGS. 11A1 to 11C1 and FIG. a2) to FIG. 11 (c2).) Since the thickness of the thin portions 77 and 78 is thinner than the thickness of the grip portions 72 and 74, it is possible to suppress the interference between the base portion 20 and the thin portions 77 and 78 when gripping the wing portion 70. As a result, the wing part 70 can be easily gripped. Moreover, since the thickness of the thin parts 77 and 78 is thinner than the thickness of the holding parts 72 and 74, there also exists an effect that it is easy to rotate the holding parts 72 and 74.

  The base part 20, the elastic part 30, the plate-like member 60, and the wing part 70 are made of the same plastic material (for example, polyethylene, polypropylene, etc.), and are formed by injection molding.

  As shown in FIGS. 9 and 10, the needle cover member 80 is a member having a substantially T-shape in front view in which the contents are hollowed out while leaving a predetermined thickness. The needle cover member 80 includes a first storage portion 82 that can store the wing portion 70, the expansion / contraction portion 30 and the plate-like member 60 in a state in which the expansion / contraction portion 30 is folded, and the curved needle 10 ( And a second storage portion 84 capable of storing the tip portion 16). A cutout 83 is provided on the upper surface of the first storage portion 82 corresponding to the position of the base portion 20. When the expansion / contraction part 30 is in the folded state, as shown in FIG. 10 (b), the wing part 70, the expansion / contraction part 30 and the plate-like member 60 are stored in the first storage part 82, and the bending needle 10 (the tip part 16 of the curved needle 10). ) Is stored in the second storage unit 84.

  Further, the needle cover member 80 has a convex portion at a position corresponding to the position of the hook portion 40 when the first and second elastic members 32 and 36 are folded (the state shown in FIG. 6A). 86, a groove portion 87 having a U-shape in plan view is provided at a position corresponding to the position of the hook portion 50, and a substantially square hole 88 is formed at a position corresponding to the position of the pressing member 46. Is provided. A predetermined clearance is provided between the needle cover member 80, the hook portions 40 and 50, and the pressing member 46 by the convex portion 86, the groove portion 87, and the hole portion 88 (see FIG. 10B).

  As shown in FIG. 9A, the first storage portion 82 has a thickness T1 along the z direction other than the portion where the convex portion 86 is provided, and a thickness T2 along the z direction of the portion where the convex portion 86 is provided. It is comprised so that it may become thinner.

The medical needle 1 according to Embodiment 1 will be described in more detail with reference to FIGS.
FIGS. 11-13 is a figure shown in order to demonstrate the medical needle 1. FIG. 11 (a1) to 11 (e1) are front views showing respective states when the medical needle 1 is used, and FIGS. 11 (a2) to 11 (e2) are FIGS. 11 (a1) to 11. It is a perspective view at the time of the state shown to (e1). FIG. 12A is a view schematically showing a state where the medical needle 1 is punctured into the patient's skin S, and FIG. 12B is a view when the medical needle 1 is removed from the patient's skin S. It is a figure which shows a mode typically. 12 (a) and 12 (b), the size of the medical needle 1 relative to the access port AP, the depth (distance) from the patient's skin S to the access port AP, and the like are exaggerated. ing. FIG. 13A is a front view of the medical needle 1 when force is applied from above the base portion 20 (direction along the z direction) when the first and second elastic members 32 and 36 are in the extended state. FIG. 13 (b) is an enlarged view of a portion indicated by reference numeral A in FIG. 13 (a). In FIG. 13B, the hook portion 40 is hatched to make the drawing easy to understand.

When using the medical needle 1, first, the needle cover member 80 is removed from the medical needle 1 (see FIG. 10B) with the needle cover member 80 attached.
Next, the gripping portions 72 and 74 of the wing portion 70 are gripped, and the wing portion 70 is rotated until the gripping portions 72 and 74 come into contact with each other (FIGS. 11A1 to 11C1 and 11A2). To FIG. 11 (c2).)
Then, with the grasping portions 72 and 74 grasped, the curved needle 10 is punctured into a predetermined portion of the access port AP embedded under the skin S of the patient (see FIG. 12A). After puncturing, if necessary, the gripping portions 72 and 74 are spread out and taped from above the gripping portions 72 and 74.

  When removing the curved needle 10 from the patient's skin S (access port AP), if the tape is fixed, the tape is peeled off, and the gripping portions 72 and 74 are picked up while holding the plate-like member 60, and the patient's skin. The curved needle 10 is pulled out from S (see FIGS. 11 (d1), 11 (e1), 11 (d2), 11 (e2), and 12 (b)). The hook portions 40 and 50 are engaged with the cutout portions 42 and 52 together with the pulling operation of the bending needle 10 or immediately after the pulling operation (see FIG. 8C).

  Note that the method of removing the curved needle 10 from the patient's skin S (access port AP) is not limited to the method described above. Although the description by illustration is omitted, the first and second elastic members 32, 74 are arranged so that the gripping portions 72, 74 are along the first and second elastic members 32, 36 (hanging on the plate-like member 60 side). 36 and the gripping portions 72 and 74 may be picked up together.

According to the medical needle 1 according to the first embodiment, since the hook portions 40 and 50 and the notches 42 and 52 are provided, the first and second elastic members 32 and 36 are in an expanded state and are notched. By locking the hook portions 40, 50 to the portions 42, 52, it is possible to continue to maintain the extended state of the first and second elastic members 32, 36.
Therefore, the medical needle 1 according to the first embodiment is a medical needle capable of maintaining the stretchable parts (first and second stretchable members) in the stretched state after the curved needle is removed from the patient's skin. Become a needle.

  Further, according to the medical needle 1 according to the first embodiment, since the pressing members 46 and 56 described above are provided, the engagement force between the hook portion 40 and the notch portion 42 (and the hook portion 50 and the notch portion 52). It is possible to further increase the engagement force). For this reason, it becomes possible to maintain the extended state of the 1st and 2nd expansion-contraction members 32 and 36 with a stronger engaging force.

  Moreover, according to the medical needle 1 which concerns on Embodiment 1, since it is comprised by the comparatively simple member by the hook parts 40 and 50, the notch parts 42 and 52, and the pressing members 46 and 56, manufacturing cost is low. It won't be so high.

  Further, according to the medical needle 1 according to the first embodiment, the length along the z direction when the first and second elastic members 32 and 36 are extended to the maximum is from the distal end portion 16 of the bending needle 10 to the bending portion. 14 or more, when the curved needle 10 is pulled out from the patient's skin (access port), the curved needle 10 (tip 16 thereof) is covered by the expansion / contraction part 30. (See FIG. 12B). For this reason, generation | occurrence | production of the erroneous stick by a user can be prevented.

  In the medical needle 1 according to the first embodiment, the pressing member 46 (and the pressing member 56) is a claw-shaped pressing member whose other end 48 extends from the first opening end 43 toward the second opening end 44. Since the predetermined space P is formed between the other end 48 and the second opening end 44, the space is not formed (that is, both ends of the pressing member are formed on the notch portion 42). The hook portions 40 and 50 can be smoothly engaged with the cutout portions 42 and 52 as compared to the case where the hook portions 40 and 50 are connected to the vicinity of the opening end.

  In the medical needle 1 according to the first embodiment, as shown in FIG. 13A, when the first and second elastic members 32 and 36 are in the extended state, the base 20 is above (the direction along the z direction). When the force is applied, the end surface of the hook portion 40 collides with the first opening end 43 as shown in FIG. 13B, so that the hook portion 40 is difficult to come off from the notch portion 42. Although description by illustration is abbreviate | omitted, since the end surface of the hook part 50 collides with the 1st opening end of the notch part 52 similarly, the hook part 50 becomes difficult to remove | deviate from the notch part 52. Further, since the other ends of the claw-shaped pressing members 46 and 56 are configured to extend from the first opening end toward the second opening end, the hook portions 40 and 50 are notched portions 42 and 52. It is possible to further suppress attempts to deviate from the above. As a result, the extended state of the first and second elastic members 32 and 36 can be maintained with a stronger engagement force.

  In the medical needle 1 according to the first embodiment, the hook portions 40 and 50, the cutout portions 42 and 52, and the pressing members 46 and 56 are respectively located on the front side in the y direction of the first and second elastic members 32 and 36. It arrange | positions on both surfaces of the surface and the surface of the y direction back side. Thus, the hook portions 40 and 50 are engaged with the notches 42 and 52 from both the front side and the back side in the y direction of the first and second elastic members 32 and 36, and the pressing members 46 and 56 are used. Since the engaging force is increased, the extended state of the first and second elastic members 32 and 36 can be maintained with a stronger engaging force.

  Since the medical needle 1 according to the first embodiment further includes the wing part 70 described above, the curved needle 10 can be easily inserted and removed by grasping the wing part 70.

  Since the medical needle 1 according to the first embodiment further includes the needle cover member 80 described above, the curved needle 10 is placed in the needle cover member 80 in a state where the telescopic portion 30 is folded before the medical needle 1 is used. The telescopic part 30 and the plate-like member 60 can be stored. For this reason, safety | security can be ensured with the expansion-contraction part 30 in the state folded. That is, the medical needle 1 according to the first embodiment is a compact medical needle while ensuring safety.

In the medical needle 1 according to the first embodiment, the needle cover member 80 is formed with the convex portion 86, the groove portion 87, and the hole portion 88 described above. That is, since a predetermined clearance is provided between the needle cover member 80 and the hook portions 40, 50 and the pressing member 46, the curved needle 10, the first and second extendable members 32, 36 are provided in the needle cover member 80. In addition, when the plate-like member 60 and the like are stored, the hook portions 40 and 50 and the pressing member 46 can be prevented from being caught by the needle cover member 80.
Further, as described above, since the thickness of the needle cover member 80 other than the portion where the convex portion 86 is provided can be reduced (because it is set to “T1 <T2” as shown in FIG. 9A), This can contribute to the miniaturization of the entire medical needle 1 including the needle cover member 80.

[Embodiment 2]
FIG. 14 is a view for explaining the medical needle 2 according to the second embodiment. 14 (a) is a front view of the medical needle 2, and FIG. 14 (b) is a cross-sectional view taken along the line AA in FIG. 14 (a). In FIG. 14, the needle cover member 80 is not shown. Moreover, in FIG. 14, the same code | symbol is attached | subjected about the member same as FIGS. 1-5, and detailed description is abbreviate | omitted.

  The medical needle 2 according to the second embodiment basically has a configuration similar to that of the medical needle 1 according to the first embodiment, but the configuration of the wings is different from that of the medical needle 1 according to the first embodiment. .

  That is, in the medical needle 2 according to the second embodiment, as shown in FIG. 14, the locked portions 175 and 176 (only the locked portion 176 are shown in FIGS. 14A and 14B) as wing portions. And a wing portion 170 having a shape shown in FIG.

  The wing portion 170 is disposed between the grip portions 172 and 174 having a substantially rectangular shape, and between the base portion 20 and the grip portions 172.174, and the thin portions 177 and 178 formed thinner than the thickness of the grip portions 172 and 174. And locked portions 175 and 176 disposed on part of the end surfaces of the gripping portions 172 and 174. Since the gripping portions 172 and 174 and the thin portions 177 and 178 have the same configuration as the gripping portions 72 and 74 and the thin portions 77 and 78 described in the first embodiment, detailed description thereof is omitted.

  The locked portions 175 and 176 are disposed at positions corresponding to the positions of the hook portions 40 and 50 when the first and second elastic members 32 and 36 are folded. The locked portions 175 and 176 have a function of locking the hook portions 40 and 50 when the first and second elastic members 32 and 36 are folded, and the wing portion 70 (the gripping portion 172 and 172). 174) has a function of releasing the engaged state with the hook portions 40 and 50 when the lever 174 is rotated.

As described above, the medical needle 2 according to the second embodiment is different from the medical needle 1 according to the first embodiment in the configuration of the wings, but as in the case of the medical needle 1 according to the first embodiment, Since the hook portions 40 and 50 and the cutout portions 42 and 52 are provided, the first and second elastic members 32 and 36 are extended and the hook portions 40 and 50 are locked to the cutout portions 42 and 52. As a result, it is possible to continue to maintain the extended state of the first and second elastic members 32 and 36.
Therefore, the medical needle 2 according to the second embodiment is a medical needle that can continue to maintain the stretchable portions (first and second stretchable members) in the stretched state after removing the curved needle from the patient's skin. Become a needle.

  Since the medical needle 2 according to the second embodiment includes the wing part 170 having the above-described locked parts 175 and 176, the first and second elastic members 32 and 36 are maintained in a folded state. It is possible to continue. For example, when the curved needle 10 is punctured into the patient's skin, there is a case in which a force to expand the first and second elastic members 32 and 36 (force to open the expansion / contraction part) is generated. However, according to the medical needle 2 according to the second embodiment, the hooking portions 40 and 50 are locked to the locked portions 175 and 176, so that it is possible to suppress such a force to extend. It becomes. Therefore, the medical needle 2 according to the second embodiment is a medical needle that can be stably punctured on the skin of the patient.

  In addition, since the locked portions 175 and 176 are configured to be able to release the engaged state with the hook portions 40 and 50 by rotating the wing portion 170, it is easy to “pick the wing portion 170”. It is possible to release the engaged state between the locked portions 175 and 176 and the hook portions 40 and 50 with a simple action.

  The medical needle 2 according to the second embodiment has the same configuration as that of the medical needle 1 according to the first embodiment except that the configuration of the wings is different. Therefore, the effect of the medical needle 1 according to the first embodiment is provided. Of the relevant effects.

  As mentioned above, although the medical needle of this invention was demonstrated based on said each embodiment, this invention is not limited to each said embodiment, In the range which does not deviate from the summary, it implements in a various aspect. For example, the following modifications are possible.

(1) In each of the above embodiments, the case where the claw-shaped pressing members 46 and 56 are configured such that the tips of the claw are directed toward the plate-shaped member 60 when the telescopic portion 30 is extended is illustrated. However, the present invention is not limited to this, and it may be configured such that the tip of the claw is directed toward the base 20 when the stretchable portion 30 is extended. In each of the above embodiments, as the pressing member, a so-called claw-shaped pressing member in which the other end 48 is not connected to the second opening end 44 of the notch 42 has been described as an example. It is not limited to this, The pressing member which consists of a structure where the both ends of the pressing member were connected to the 1st or 2nd opening end vicinity position of a notch part may be sufficient.

(2) In each of the above-described embodiments, the case where the notch shapes of the notch portions 42 and 52 are substantially U-shaped as illustrated in FIG. 1 and FIG. However, the present invention is not limited to this. For example, any cutout shape may be used as long as the hook portion can be locked, such as a U shape or a trapezoidal shape. Also, the shape of the hook portion can be appropriately changed according to the notch shape of the notch portion.

(3) In each of the above embodiments, the notch portion 42 and the pressing member 46 are disposed on the front surface in the y direction of the first elastic member 32, and the hook portion is disposed on the front surface of the second elastic member 36 in the y direction. 40 is disposed, the hook portion 50 is disposed on the back surface of the first elastic member 32 in the y direction, and the notch portion 52 and the pressing member 56 are disposed on the back surface of the second elastic member 36 in the y direction. Although the case has been described by way of example, the present invention is not limited to this. For example, the notch portion and the pressing member are arranged on both the front surface and the back surface in the y direction of the first elastic member 32, and the front surface and the back surface of the second elastic member 36 on the front surface in the y direction. The hook part may be arrange | positioned at both.

(4) In each of the above embodiments, the hook portions 40, 50, the cutout portions 42, 52, and the hook portions 40, 50 are located closer to the plate member 60 than the bent portions 34, 38 in the first and second elastic members 32, 36. Although the case where the pressing members 46 and 56 are disposed has been described as an example, the present invention is not limited to this. For example, the hook part, the notch part, and the pressing member are arranged at positions near the bent parts 34, 38 in the first and second elastic members 32, 36 or closer to the base part 20 than the bent parts 34, 38, respectively. Also good.

(5) In each of the above-described embodiments, one set of hook portion, notch portion, and pressing member is disposed on both the front and back surfaces in the y direction of the first and second elastic members 32, 36. However, the present invention is not limited to this. For example, one set of the hook portion, the notch portion, and the pressing member may be disposed on only one of the front surface and the rear surface in the first and second elastic members 32, 36. In addition, a plurality of sets of hook portions, notch portions, and pressing members may be arranged on only one of the front surface and the back surface in the y direction of the first and second elastic members 32, 36, A plurality of sets of hook portions, notch portions, and pressing members may be disposed on both the front surface and the back surface in the y direction of the first and second elastic members 32 and 36.

(6) In each of the embodiments described above, a needle having a convex portion 86, a groove portion 87, and a hole portion 88 in order to provide a predetermined clearance between the needle cover member and the hook portions 40, 50 and the pressing member 46. Although the cover member 80 has been exemplified and described, the present invention is not limited to this. As long as a predetermined clearance can be provided between the needle cover member and the hook portions 40 and 50 and the pressing member 46, a needle cover member having another shape and configuration may be used. Further, the convex portions 86, the groove portions 87, and the hole portions 88 are not limited to the shapes described above.

(7) In the second embodiment, as can be seen from FIG. 14, the case where the locked portions 175 and 176 are provided on part of the end surfaces of the grip portions 172 and 174 has been described as an example. The invention is not limited to this. For example, the locked portion may be provided on the entire end surface of the grip portions 172 and 174.

(8) In each of the above embodiments, the case where the plate-like member is substantially rectangular has been described as an example, but the present invention is not limited to this. For example, an elliptical or round plate-shaped member may be used, a triangular or square plate-shaped member may be used, and a pentagonal or more polygonal plate-shaped member may be used.

(9) In each of the above embodiments, the case where the passage portion 62 formed on the plate-like member 60 is slit-shaped (notched) has been described as an example, but the present invention is limited to this. It is not a thing. As a passage part, the hole (round hole or square hole) formed in the position (substantially center part of a plate-shaped member) where the curved needle 10 passes may be sufficient, for example.

(10) In each of the above embodiments, the case where the base portion 20, the stretchable portion 30, the plate-like member 60, and the wing portions 70 and 170 are integrally formed has been described, but the present invention is limited to this. It is not a thing. For example, these members may be created individually and then joined.

(11) In each of the above embodiments, the case where the base portion 20, the stretchable portion 30, the plate member 60, and the wing portions 70 and 170 are made of the same plastic material (for example, polyethylene, polypropylene, etc.) has been described as an example. However, the present invention is not limited to this. For example, different plastic materials may be used for each member, or these members may be formed of a material other than the plastic material.

(12) In each of the above embodiments, the case where the bending portion 14 of the bending needle 10 is bent 90 degrees has been described as an example, but the present invention is not limited to this. The present invention can also be applied to a medical needle including a curved needle that is curved at an angle of less than 90 degrees or greater than 90 degrees.

(13) In each of the above embodiments, the case where the wing portions 70 and 170 are a pair of wing members connected to the side of the base portion 20 has been described as an example, but the present invention is limited to this. For example, one wing member may be arranged above the base 20 so as to extend along the z direction. In each of the above embodiments, the wing portions 70 and 170 having the substantially rectangular gripping portions 72, 74, 172, and 174 have been described as examples. However, the present invention is not limited to this, and the The wing | blade part which has a holding part of the shape (for example, round shape etc.) different from rectangular shape may be sufficient.

(14) In each of the above embodiments, the direction in which the first and second elastic members 32 and 36 spread and the long side direction of the plate-like member 60 are aligned in the same x direction when the elastic part 30 is folded, and the blade Although the case where the grip portions 72, 74, 172, and 174 of the portions 70 and 170 extend in the x direction has been described as an example, the present invention is not limited to this. For example, the spreading direction of the first and second elastic members and the long side direction of the plate-like member may be aligned in the same x direction, and the grip portion of the wing portion may be configured to extend in the y direction. Alternatively, the extending direction of the first and second elastic members and the long side direction of the plate-like member may be aligned in the same y direction, and the grip portion of the wing portion may be configured to extend in the y direction.
In the latter case, that is, the direction in which the first and second expandable members spread, the long side direction of the plate-like member, and the direction in which the gripping portion of the wing portion extends is the y direction, which is the longitudinal direction of the base portion 20. When the medical needles are aligned in the same direction, the width of the entire medical needle in the x direction can be made relatively small. For example, when two or more medical needles are arranged side by side, The medical needle can be arranged in a state where the tube outlet direction is aligned in one direction.

(15) In each of the above-described embodiments, the base 20 having the tube connecting portion 22 is exemplified and described as the base, but the present invention is not limited to this, and for example, the tube connecting portion is omitted. You may provide the base (base which does not have a tube connection part). In this case, for example, the base end portion 12 of the curved needle 10 may be exposed from the base portion, and the base end portion 12 and the tube may be directly connected.

1 is a perspective view of a medical needle 1. FIG. FIG. 3 is a perspective view of the medical needle 1 when viewed from a direction different from that in FIG. 1. 1 is a front view of a medical needle 1. FIG. The rear view of the medical needle 1. FIG. The side view of the medical needle 1. FIG. The figure shown in order to demonstrate a mode that the 1st and 2nd expansion-contraction members 32 and 36 expand and contract. The figure shown in order to demonstrate a mode that the hook parts 40 and 50 are latched by the notch parts 42 and 52. FIG. The figure shown in order to demonstrate the hook part 40, the notch part 42, and the pressing member 46. FIG. The figure shown in order to demonstrate the needle cover member 80. FIG. The figure shown in order to demonstrate the needle cover member 80. FIG. The figure shown in order to demonstrate the medical needle 1. FIG. The figure shown in order to demonstrate the medical needle 1. FIG. The figure shown in order to demonstrate the medical needle 1. FIG. The figure shown in order to demonstrate the medical needle 2 which concerns on Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Medical needle 10 Curved needle 12 Curved needle base end part 14 Curved part 16 Curved needle distal end part 20 Base part 22 Tube connecting part 30 Stretchable part 32 First stretchable member 34, 38 Bent part 36 Second stretchable member 40 , 50 Hook parts 42, 52 Notch part 43 First opening end 44 Second opening end 45 Third opening end 46, 56 Pressing member 47 (pressing member) one end 48 (pressing member) other end 60 Plate-like member 62 Passing part 70, 170 Wing part 72, 74, 172, 174 Grasping part 77, 78, 177, 178 Thin part 80 Needle cover member 82 First storing part 83 Notch 84 (first storing part) Second storing part 86 Convex part 87 Groove part 88 Hole part 175,176 Locked part AP Access port S Patient's skin T1 Thickness T2 along the z direction other than the part provided with the convex part Along the z direction of the part provided with the convex part Thickness

Claims (5)

A curved needle (10) having a curved portion (14) curved at a predetermined angle;
A base (20) in which a part of the curved needle (10) is implanted;
An extendable portion (30) provided on the base portion (20) and configured to be extendable in the first (z) direction along the distal end portion (16) of the curved needle from the curved portion (14);
A plate-like member (60) having a passage portion (62) that is connected and arranged on the opposite side to the base portion (20) in the stretchable portion (30) and allows the curved needle (10) to pass therethrough,
The stretchable part (30)
The length along the first (z) direction when the stretchable part (30) is most extended is equal to or longer than the length from the distal end part (16) of the curved needle to the curved part (14). It is an elastic member configured to,
A first expandable member (32) and a second expandable member (36) that are expandable and contractable in a pantograph shape and are opposed to each other with the curved needle (10) interposed therebetween;
A hook portion (40) disposed on one side of the first and second elastic members (32, 36);
Arranged on the other side of the first and second elastic members (32, 36), the hook portion (40) is locked when the first and second elastic members (32, 36) are extended. A notch (42) to be made;
It is arranged in the vicinity of the notch (42), and when the hook (40) is locked to the notch (42), the hook (40) is directed to the notch (42). A medical needle (1) having a pressing member (46) having a function of pressing and holding. The medical needle according to claim 1, wherein
The notch (42) includes a first opening end (43) located on the base (20) side, a second opening end (44) located on the plate-like member (60) side, and the first An open end (43) and a third open end (45) connecting the second open end (44);
The pressing member (46) has one end (47) connected to a position near the first opening end (43) and the other end (48) from the first opening end (43) to the second opening end (44). ) Is a claw-shaped pressing member extending in the direction, and is configured such that a predetermined space (P) is formed between the other end (48) and the second opening end (44). A medical needle (1) characterized by the above. The medical needle according to claim 1 or 2,
When the same direction as the direction along the curved portion (14) from the proximal end (12) side portion of the curved needle is the second (y) direction,
The hook part (40, 50), the notch part (42, 52), and the pressing member (46, 56) are respectively connected to the second (y) in the first and second elastic members (32, 36). ) The medical needle (1), which is disposed on both the front surface and the back surface in the second (y) direction. The medical needle according to any one of claims 1 to 3,
A wing (170) provided on the base (20) and configured to be rotatable about the base (20) as a central axis;
The wing portion (170) is a locked portion (175, 176) to which the hook portion (40, 50) is locked when the first and second elastic members (32, 36) are folded. )
The locked portion (175, 176) is
Among the wing parts (170), the first and second elastic members (32, 36) are arranged at positions corresponding to the positions of the hook parts (40, 50) when folded. ,
The medical needle (2) configured to be able to release the engaged state with the hook portion (40, 50) by rotating the wing portion (170). The medical needle according to any one of claims 1 to 3,
A wing (70) provided in the base (20);
A needle cover member (80) covering the curved needle (10) while pressing the wing portion (70) and the plate member (60) in a state where the stretchable portion (30) is folded;
The needle cover member (80) has at least one of the hook portion (40) and the pressing member (46) when the first and second elastic members (32, 36) are folded. A medical needle (1), wherein a predetermined clearance is provided at a position corresponding to the position.

Images