WO2017141548A1 - Aiguille de seringue et appareil médical - Google Patents

Aiguille de seringue et appareil médical Download PDF

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Publication number
WO2017141548A1
WO2017141548A1 PCT/JP2016/088742 JP2016088742W WO2017141548A1 WO 2017141548 A1 WO2017141548 A1 WO 2017141548A1 JP 2016088742 W JP2016088742 W JP 2016088742W WO 2017141548 A1 WO2017141548 A1 WO 2017141548A1
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WO
WIPO (PCT)
Prior art keywords
diameter portion
injection needle
side hole
small
needle according
Prior art date
Application number
PCT/JP2016/088742
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English (en)
Japanese (ja)
Inventor
英之 朝倉
秀徳 藤原
大谷内　哲也
西川　尚穂
Original Assignee
テルモ株式会社
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Application filed by テルモ株式会社 filed Critical テルモ株式会社
Publication of WO2017141548A1 publication Critical patent/WO2017141548A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles

Definitions

  • the present invention relates to an injection needle and a medical instrument provided with such an injection needle.
  • an injection needle for injecting a fluid such as a chemical into a living body such as a human body is known.
  • medical instruments such as a needle-implanted syringe in which such an injection needle is directly fixed to the port of the syringe body, and a syringe needle with a hub fixed to a needle base (hub) connectable to the port of the syringe body. ing.
  • a through hole (side hole) is provided on the side surface of the injection needle, and in addition to the distal end opening surrounded by the blade surface of the distal end portion of the injection needle, fluid also flows out from this side hole. It is possible to make it possible.
  • a technique for providing a side hole in an injection needle for example, a technique described in Patent Document 1 is known.
  • tip part of an injection needle is provided.
  • the present invention has been made in view of such problems, and it is intended to provide an injection needle and a medical instrument that can effectively reduce injection resistance and diffuse fluid when injecting fluid into a living body. Objective.
  • the injection needle of the present invention is a syringe needle for injecting a fluid into a living body having a distal end opening surrounded by a blade surface at a distal end portion, and having a tubular shape and extending from a proximal end portion to a predetermined range.
  • the inner diameter of the reduced diameter portion gradually decreases from the large diameter portion side toward the small diameter portion side.
  • the injection needle of the present invention has a certain thickness from the base end portion to the tip end portion.
  • the large-diameter portion, the small-diameter portion, and the reduced-diameter portion are configured by a plate-like body that is curved in a tubular shape and whose butt end faces are joined to each other.
  • an outer peripheral end surface forming an outer peripheral edge of the at least one side hole extends along a radial direction of the small diameter portion.
  • the fluid preferably has a viscosity at room temperature of 1 to 100 cps.
  • the fluid preferably has a viscosity at room temperature of 10 to 20 cps.
  • the at least one side hole is at least one long hole extending in the longitudinal axis direction of the small diameter portion.
  • the at least one side hole is a plurality of holes arranged at intervals in the longitudinal axis direction of the small diameter portion.
  • the plurality of holes are arranged in the longitudinal axis direction of the injection needle.
  • the at least one side hole is preferably a square hole.
  • the at least one side hole is preferably a round hole.
  • the at least one side hole is provided on a side surface of the small diameter portion viewed from the blade surface side.
  • the injection needle of the present invention preferably includes a rough surface portion on the outer peripheral surface of the large diameter portion.
  • a medical instrument of the present invention includes any one of the injection needles of the present invention described above and a cylindrical cylinder, and includes an outer peripheral surface of the large-diameter portion of the injection needle, A junction is provided between the peripheral surface and the peripheral surface.
  • a joint is provided between the outer peripheral surface of the reduced diameter portion and the large diameter portion of the injection needle and the inner peripheral surface of the cylindrical body.
  • the injection needle according to the present invention is provided over a predetermined range from the base end portion, and is provided with a large diameter portion having a constant inner diameter dimension and a predetermined range from the distal end portion, and is constant smaller than the large diameter portion.
  • a small-diameter portion having an inner-diameter dimension, and a reduced-diameter portion having an inner-diameter dimension that is provided over a range between the large-diameter portion and the small-diameter portion and decreases from the large-diameter portion side toward the small-diameter portion side, And at least one side hole penetrating the side surface of the small diameter portion.
  • the injection needle according to the present invention it is possible to effectively reduce the fluid injection resistance generated in the entire inside of the injection needle. Moreover, according to the injection needle according to the present invention, the fluid can be dispersed and discharged through the tip opening and at least one side hole, so that the fluid can be effectively diffused in the living body.
  • the medical instrument according to the present invention since such an injection needle is joined to the cylindrical body at the large diameter portion, it is possible to effectively reduce the fluid injection resistance generated in the entire interior of the medical instrument.
  • the fluid can be effectively diffused in the living body through the tip opening of the injection needle and at least one side hole.
  • an injection needle and a medical instrument that can effectively reduce the injection resistance and diffuse the fluid when injecting the fluid into the living body.
  • FIG. 3A is a sectional view taken along line BB in FIG. 3C, and FIG.
  • 3B is a sectional view taken along line CC in FIG. It is a fragmentary perspective view which shows the manufacture point of the injection needle shown in FIG. 2, (a) is the state immediately after a punching process, (b) is the state of the initial stage of a press process, (c) is the state of the final stage of a press process. , (D) shows the state when the pressing process is completed. It is a figure which shows a part of injection needle which concerns on other embodiment of this invention, (a) is a perspective view, (b) is the side view seen from the blade surface side, (c) is the side of a blade surface It is the side view seen from. It is a fragmentary perspective view which shows the manufacture point of the injection needle shown in FIG.
  • the “tip” means the side (left side in FIG. 2 (a)) where the blade surface of the injection needle is located in the longitudinal axis direction of the injection needle
  • the “base end” means It means the opposite side (the right side in FIG. 2 (a)).
  • a medical device 100 includes an injection needle 1 for injecting a fluid such as a chemical into a living body such as a human body.
  • the injection needle 1 has a configuration that is particularly suitable for applications in which fluid is injected into the skin or skin of a living body.
  • the injection needle 1 has a configuration that is particularly suitable when a relatively high-viscosity fluid such as a biopharmaceutical centering on a protein preparation is targeted. Specifically, it is particularly suitable when the viscosity of the fluid at normal temperature (that is, 25 ° C.) is 1 to 100 cps, and more preferably 10 to 20 cps.
  • the medical instrument 100 is a syringe including an injection needle 1, a syringe body 102, and a plunger (not shown).
  • a cylindrical body 101 having a diameter smaller than that of the syringe main body 102 is integrally provided at the distal end portion of the cylindrical syringe main body 102, and an inner peripheral surface of the cylindrical body 101 and an injection needle 1 to be described later.
  • a joining portion is provided between the outer peripheral surface of the cylindrical large-diameter portion 11 (see FIG. 2).
  • the medical instrument 100 of the present embodiment is configured as a needle-implantable syringe in which the injection needle 1 is directly fixed to the port of the syringe body 102, and thus is supplied to the medical site in a state of being prefilled with fluid. It is particularly suitable for a prefilled syringe.
  • the fluid in the syringe body 102 is pushed from the injection needle 1 by pushing the gasket attached to the distal end side of the plunger toward the distal end side while the syringe body 102 is filled with fluid. Can be drained.
  • the syringe body 102 can be formed of a resin material such as cyclic polyolefin, cyclic polyolefin copolymer, or polypropylene.
  • the injection needle 1 can be formed with metal materials, such as stainless steel and a titanium alloy, for example.
  • the joint between the cylinder 101 and the large-diameter portion 11 of the injection needle 1 is, for example, an adhesive portion using an adhesive or the like, for example, a fusion portion using heating of the injection needle 1 by laser irradiation or the like. be able to.
  • the outer peripheral surface of the large diameter part 11 may be directly fused to the inner peripheral surface of the cylindrical body 101, or the inner peripheral surface of the cylindrical body 101 and the large diameter
  • the large-diameter portion 11 and the cylindrical body 101 may be fused by pressing the resin inner cylindrical body while melting it between the outer peripheral surface of the portion 11.
  • the injection needle 1 when the injection needle 1 is joined, not only the large diameter portion 11 but also the outer peripheral surface of the reduced diameter portion 13 (see FIG. 2) described later of the injection needle 1 is joined to the inner peripheral surface of the cylinder 101. It is preferable to configure. That is, it is preferable to provide a joint between the outer peripheral surface of the reduced diameter portion 13 and the large diameter portion 11 of the injection needle 1 and the inner peripheral surface of the cylindrical body 101. Since the reduced diameter portion 13 has a conical shape that decreases in diameter from the proximal end side toward the distal end side, the medical instrument 100 is configured by such joining so that the injection needle 1 can be pulled out to the distal end side. The joint strength with respect to can be increased efficiently.
  • the rough surface portion is constituted by a knurling 11 a (see FIG. 2) composed of a plurality of tubular grooves extending in the circumferential direction of the large diameter portion 11.
  • the medical instrument 100 is configured as a needle-implantable syringe in which the injection needle 1 is directly fixed to the cylindrical body 101 that is a port of the syringe body 102, but instead of such a configuration, for example, a syringe body You may comprise as a syringe needle with a hub fixed to the needle base (hub) connectable to this port. Further, the medical instrument 100 can employ other configurations as long as the outer peripheral surface of the large-diameter portion 11 of the injection needle 1 is joined to the inner peripheral surface of the cylindrical body 101.
  • the injection needle 1 has a tubular shape having a distal end opening 12b surrounded by a blade surface 12a at the distal end, and has a constant thickness from the distal end to the proximal end. t. Further, the injection needle 1 is provided over a predetermined range from the base end portion, and is provided with a large diameter portion 11 having a constant inner diameter dimension d11 and a predetermined range from the distal end portion. Are provided over a range between the small diameter portion 12 having a small constant inner diameter dimension d12 and the large diameter portion 11 and the small diameter portion 12, and decreases from the large diameter portion 11 side toward the small diameter portion 12 side. And a reduced diameter portion 13 having an inner diameter. In the present embodiment, each of the large diameter portion 11 and the small diameter portion 12 has a cylindrical shape, and the reduced diameter portion 13 has a conical shape whose diameter decreases from the proximal end side toward the distal end side.
  • the reduced diameter portion 13 has a configuration having an inner diameter that gradually decreases from the large diameter portion 11 side toward the small diameter portion 12 side as in the present embodiment, from the viewpoint of reducing fluid injection resistance.
  • an inner diameter dimension gradually decreases in this way
  • a configuration in which the inner diameter size decreases in a stepped shape is also possible.
  • the injection needle 1 is provided with at least one side hole 12c that penetrates the side surface of the small diameter portion 12.
  • at least one side hole 12 c is provided on a side surface of the small diameter portion 12 as viewed from the blade surface 12 a side, and a direction (longitudinal direction) along the longitudinal axis O of the small diameter portion 12. It is configured as one long hole extending in the axial direction.
  • the said long hole has comprised the shape of a square hole.
  • the outer peripheral end surface 12c1 forming the outer peripheral edge of the side hole 12c extends along the radial direction of the small diameter portion 12.
  • the injection needle 1 is composed of a plate-like body 14 that is curved in a tubular shape and whose butt end surfaces 14a are joined to each other.
  • the injection needle 1 of the present embodiment having such a configuration can be efficiently manufactured in the following manner.
  • deployment shape of the injection needle 1 is obtained by punching out a metal thin plate.
  • a notch 14b constituting the side hole 12c can be formed on the butted end surface 14a of the plate-like body 14 when the plate-like body 14 is curved in a tubular shape and the butted end surfaces 14a are joined to each other.
  • the knurl 11a (see FIG. 2) of the large-diameter portion 11 described above can be simultaneously formed in this punching process.
  • FIGS. 5 (b) and 5 (c) a pressing process for sandwiching the plate-like body 14 between the upper mold and the lower mold having a predetermined shape is performed a plurality of times, so that FIG. A tubular body having side holes 12c as shown in d) can be obtained.
  • the butt end surfaces 14a can be joined to each other with high accuracy by welding using laser irradiation.
  • the joining of the butt end surface 14a is not necessarily limited to welding, and for example, an adhesive can be used.
  • the blade surface 12a of a predetermined shape can be formed by cutting the front-end
  • the total length L1 of the injection needle 1 shown in FIG. 2 is 21.9 mm
  • the length L12 of the small diameter portion 12 is 8.7 mm
  • the length L13 of the reduced diameter portion 13 is 5.5 mm
  • the effective length is 12.7 mm ( Including a reduced diameter portion of 4.0 mm).
  • the small-diameter portion 12 is 29G (gauge) (outer diameter D12 is 0.338 mm)
  • the inner diameter d12 is 0.238 mm
  • the large-diameter portion 11 is 24G (outer diameter D11 is 0.565 mm)
  • the inner diameter d11 is
  • the thickness is 0.465 mm and the wall thickness t is 0.050 mm.
  • the blade surface length L12a is 1.8 mm
  • the total length L11a of the rough surface portion made of the knurl 11a is 4.8 mm
  • the gap G11a between the rough surface portion (knurl 11a) and the tip of the large diameter portion 11 is 0.4 mm.
  • the total length L1 of the injection needle 1 is preferably 10 to 90 mm, more preferably 13 to 38 mm.
  • the length L12 of the small diameter portion 12 is preferably 1 to 70 mm, more preferably 2 to 25 mm.
  • the length L13 of the reduced diameter portion 13 is preferably 1 to 50 mm, more preferably 2 to 20 mm.
  • the small diameter part 12 is preferably 34 to 23G, more preferably 31 to 25G.
  • the large diameter portion 11 is preferably 30 to 18G, more preferably 29 to 24G.
  • the wall thickness t is preferably 0.040 to 0.220 mm, more preferably 0.043 to 0.100 mm.
  • the blade surface length L12a is preferably 0.8 to 6.37 mm, and more preferably 1.10 to 2.60 mm.
  • the total length L11a of the rough surface portion is preferably 2 to 30 mm, more preferably 4 to 10 mm.
  • the distance G11a between the rough surface portion (knurl 11a) and the tip of the large diameter portion 11 is preferably 0.05 to 5.0 mm, more preferably 0.1 to 1.0 mm.
  • the side hole 12c shown in FIG. 3 has an overall length L12c of 1.5 mm, a width W12c of 0.094 mm, and a distance G12c from the base end of the blade surface 12a of 0.5 mm.
  • the total length L12c of the side hole 12c is preferably 0.2 to 5.0 mm, more preferably 1.0 to 2.5 mm.
  • the width W12c of the side hole 12c is preferably 0.03 to 1.0 mm, more preferably 0.05 to 0.3 mm.
  • the gap G12c between the side hole 12c and the base end of the blade surface 12a is preferably 0.3 to 3.0 mm, more preferably 0.5 to 2.0 mm.
  • the injection needle 1 is a syringe needle 1 for injecting a fluid into a living body, having a tubular shape and having a distal end opening 12b surrounded by a blade surface 12a at a distal end portion.
  • the large-diameter portion 11 provided over a predetermined range from the base end portion and having a constant inner diameter dimension d11, and the constant inner-diameter dimension provided over a predetermined range from the distal end portion and smaller than the large diameter portion 11
  • Small diameter portion 12 having d12 and a reduced diameter having an inner diameter dimension which is provided over a range between large diameter portion 11 and small diameter portion 12 and decreases from the large diameter portion 11 side toward the small diameter portion 12 side.
  • the configuration includes a portion 13 and at least one side hole 12c penetrating the side surface of the small diameter portion 12.
  • the injection needle 1 it is possible to effectively reduce the injection resistance of the fluid generated in the entire inside of the injection needle 1. Further, according to the injection needle 1 according to the present embodiment, the fluid can be dispersed and discharged through the tip opening 12b and at least one side hole 12c, so that the fluid can be effectively diffused in the living body. it can.
  • the injection needle 1 according to the present embodiment is configured such that the inner diameter of the reduced diameter portion 13 is gradually reduced from the large diameter portion 11 side toward the small diameter portion 12 side. Therefore, according to the injection needle 1 according to the present embodiment, the fluid injection resistance can be more effectively reduced.
  • the injection needle 1 according to the present embodiment is configured to have a constant thickness t from the proximal end portion to the distal end portion. Therefore, according to the injection needle 1 according to the present embodiment, the outer diameter of the small diameter portion 12 and the reduced diameter portion 13 is made smaller than that of the large diameter portion 11, and the puncture resistance at the time of puncture can be effectively reduced. it can.
  • the injection needle 1 according to the present embodiment is configured by a plate-like body 14 in which the large diameter portion 11, the small diameter portion 12, and the reduced diameter portion 13 are curved in a tubular shape and the butt end surfaces 14a are joined to each other. Therefore, according to the injection needle 1 according to the present embodiment, it is possible to efficiently manufacture by punching the plate-like body 14 from a thin plate, pressing the plate-like body 14 into a tube shape, and joining the butt end face 14a. .
  • the injection needle 1 is configured such that the outer peripheral end surface 12c1 that forms the outer peripheral edge of at least one side hole 12c extends along the radial direction of the small diameter portion 12. Therefore, according to the injection needle 1 which concerns on this embodiment, the side hole 12c (or the notch 14b which comprises the side hole 12c at the time of a press work) can also be formed in the punching process of the plate-shaped body 14 from a thin plate. Therefore, efficient production is possible, and moreover, the fluid can be diffused effectively because the fluid can be discharged radially from the side hole 12c at the time of injection.
  • the injection needle 1 according to the present embodiment is for injecting a fluid having a viscosity at normal temperature of 1 to 100 cps, more preferably 10 to 20 cps into a living body. Therefore, according to the injection needle 1 according to the present embodiment, a relatively high-viscosity fluid such as a biopharmaceutical centering on a protein preparation can be smoothly injected into the living body, and the effects in the living body can be obtained. Fluid diffusion can be realized.
  • the injection needle 1 according to the present embodiment is configured such that at least one side hole 12c is at least one long hole extending in the longitudinal axis direction of the small diameter portion 12. Therefore, according to the injection needle 1 according to the present embodiment, reduction and diffusion of fluid injection resistance can be effectively realized with a simple configuration.
  • the injection needle 1 according to the present embodiment is configured such that at least one side hole 12c is a square hole. Therefore, according to the injection needle 1 according to the present embodiment, reduction and diffusion of fluid injection resistance can be effectively realized with a simple configuration.
  • At least one side hole 12c is provided on a side surface of the small diameter portion 12 as viewed from the blade surface 12a side (that is, a side surface located on the opposite side of the blade edge). It is the composition. Therefore, according to the injection needle 1 according to the present embodiment, an increase in puncture resistance at the time of puncture due to the provision of at least one side hole 12c can be suppressed.
  • the injection needle 1 according to the present embodiment is configured to include a rough surface portion (for example, a knurling 11a) on the outer peripheral surface of the large diameter portion 11. Therefore, according to the injection needle 1 according to the present embodiment, the bonding strength when the large-diameter portion 11 of the injection needle 1 is bonded to the cylindrical body 101 of the medical device 100 can be increased.
  • a rough surface portion for example, a knurling 11a
  • the medical instrument 100 includes the above-described injection needle 1 and a cylindrical cylinder 101, and includes an outer peripheral surface of the large-diameter portion 11 of the injection needle 1 and an inner periphery of the cylindrical body 101. It is the structure that the junction part is provided between the surfaces. Therefore, according to the medical instrument 100 according to the present embodiment, it is possible to effectively reduce the injection resistance of the fluid generated in the entire interior of the medical instrument 100, and at the same time, the tip opening 12b of the injection needle 1 and at least one side hole 12c. Thus, the fluid can be effectively diffused in the living body.
  • the medical instrument 100 has a configuration in which a joint portion is provided between the outer peripheral surface of the reduced diameter portion 13 and the large diameter portion 11 of the injection needle 1 and the inner peripheral surface of the cylindrical body 101. Therefore, it is possible to efficiently increase the bonding strength against the withdrawal of the injection needle 1 toward the distal end side.
  • the injection needle and medical instrument according to the present embodiment have the same configuration as the embodiment described with reference to FIGS. 1 to 5 except that the shape of the side hole 22c of the injection needle 2 is different. .
  • one side hole 12c formed as a rectangular hole is provided.
  • four side holes 22c formed as square holes arranged at equal intervals and arranged in the longitudinal axis direction are provided.
  • each side hole 22c is provided on the side surface of the small diameter portion 22 as viewed from the blade surface 22a side, and the outer peripheral end surface 22c1 that forms the outer periphery of each side hole 22c is:
  • the small diameter portion 22 extends along the radial direction.
  • the injection needle 2 can be manufactured in the same manner as in the embodiment described with reference to FIGS. That is, first, as shown in FIG. 7A, in the punching process for obtaining the plate-like body 24 having the developed shape of the injection needle 2, the plate-like body 24 is tubular on the butt end surface 24 a of the plate-like body 24. It is possible to form a notch 24b that constitutes the side hole 22c when the butted end surfaces 24a are joined to each other. Then, as shown in FIGS. 7B and 7C, a tubular body having a side hole 22c as shown in FIG. 7D is obtained by bending the plate-like body 24 by performing a plurality of pressing steps. Can be obtained. Thereafter, the butt end surface 24a is joined, and the injection needle 2 can be obtained by forming the blade surface 22a having a predetermined shape at the tip of the tubular body.
  • each side hole 22c of the injection needle 2 shown in FIG. 6 is 0.2 mm
  • the width W22c of each side hole 22c is 0.094 mm
  • the gap g22c between the side holes 22c is 0.3 mm.
  • a gap G22c between the side hole 22c located on the most distal side and the base end of the blade surface 22a is 0.3 mm.
  • Various dimensions of the portions other than the side holes 22c are the same as those in the embodiment described with reference to FIGS.
  • the length L22c of each side hole 22c is preferably 0.1 to 1.0 mm, and more preferably 0.15 to 0.5 mm.
  • the width W22c of each side hole 22c is preferably 0.03 to 1.0 mm, more preferably 0.05 to 0.3 mm.
  • the gap g22c between the side holes 22c is preferably 0.1 to 1.0 mm, more preferably 0.2 to 0.5 mm.
  • the distance G22c between the side hole 22c located on the most distal side and the base end of the blade surface 22a is preferably 0.3 to 2.0 mm, more preferably 0.3 to 1.5 mm.
  • the injection needle 2 according to the present embodiment is configured such that at least one side hole 22c is a plurality of holes arranged at intervals in the longitudinal axis direction of the small diameter portion 22. Therefore, according to the injection needle 2 according to the present embodiment, it is possible to reliably diffuse the fluid.
  • the injection needle 2 according to the present embodiment is configured such that the plurality of holes (side holes 22c) are arranged in the longitudinal axis direction of the injection needle 2. Therefore, according to the injection needle 2 according to the present embodiment, the fluid can be reliably diffused with a simple configuration.
  • the injection needle and the medical instrument according to this embodiment have the same configuration as that of the embodiment described with reference to FIGS. 1 to 5 except that the shape of the side hole 32c of the injection needle is different.
  • one side hole 12c formed as a rectangular hole is provided.
  • Three side holes 32c formed as round holes arranged at equal intervals and shifted in the circumferential direction are provided. These three side holes 32c are constituted by a notch 34b and a through hole 34d.
  • the injection needle according to the present embodiment can be manufactured in the same manner as in the embodiment described with reference to FIGS. That is, first, as shown in FIG. 8A, in the punching process for obtaining the plate-like body 34 having the developed shape of the injection needle, a side hole 32c is formed in the butt end surface 34a of the plate-like body 34. The notch 34b and the through hole 34d can be formed. Then, as shown in FIGS. 8B and 8C, a tubular body having a side hole 32c as shown in FIG. 8D is obtained by bending the plate-like body 34 by performing a plurality of pressing steps. Can be obtained. Thereafter, the butt end surface 34a is joined, and a blade surface having a predetermined shape is formed at the distal end portion of the tubular body, whereby an injection needle can be obtained.
  • the injection needle according to the present embodiment is configured such that at least one side hole 32c is a round hole. Therefore, according to the injection needle according to the present embodiment, reduction and diffusion of fluid injection resistance can be effectively realized with a simple configuration.
  • the circumferential position and the longitudinal axis position where the side holes 12c are provided may be changed, and a plurality of side holes 12c may be arranged.
  • the number and shape of the side holes 22c, the interval between the side holes 22c may be changed, and a plurality of side holes arranged in the longitudinal axis direction may be used.
  • You may change the circumferential direction position and longitudinal-axis direction position which provide 22c.
  • the number, shape, and arrangement of the plurality of round holes constituting the side hole 32 c may be changed.
  • Injection needle 11 Large diameter part 11a Knurled (rough surface part) 12 Small-diameter portion 12a Blade surface 12b Tip opening 12c Side hole 12c1 Outer peripheral end surface of side hole 13 Reduced-diameter portion 14 Plate-like body 14a Butt end surface 14b Notch 2 Injection needle 22 Small-diameter portion 22a Blade surface 22c Side hole 22c1 Outer end surface of side hole 24 Plate-like body 24a Butt end face 24b Notch 32c Side hole 34a Butt end face 34b Notch 34d Through hole 100 Medical instrument 101 Tubular body 102 Syringe body O Longitudinal axis L1 Length of syringe needle L11a Length of rough surface part L12 Length of small diameter part Length L12a Blade length L12c Length of side hole L13 Length of reduced diameter portion W12c Width of side hole D11 Outer diameter size of large diameter portion D12 Outer diameter size of small diameter portion d11 Inner diameter size of large diameter

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une aiguille de seringue (2) qui est caractérisée en ce qu'elle comprend : une section de grand diamètre (11) qui est disposée sur une plage prédéterminée depuis une section d'extrémité proximale et a une certaine dimension de diamètre interne ; une section de petit diamètre (12) qui est disposée sur une plage prédéterminée depuis une section d'extrémité distale et a une certaine dimension de diamètre interne qui est plus petite que celle de la section de grand diamètre (11) ; une section de diamètre décroissant (13) qui est disposée sur une plage entre la section de grand diamètre (11) et la section de petit diamètre (12) et a une dimension de diamètre interne qui diminue du côté de la section de grand diamètre (11) au côté de la section de petit diamètre (12) ; et au moins un trou latéral (12c) pénétrant à travers une surface latérale de la section de petit diamètre (12). De plus, cet appareil médical (100) est caractérisé par les éléments suivants : il comporte l'aiguille de seringue (2) et un tube (101) ayant une forme cylindrique ; et il comporte une section de jonction située entre une surface périphérique externe de la section de grand diamètre (11) de l'aiguille de seringue (2) et une surface périphérique interne du tube (101).
PCT/JP2016/088742 2016-02-18 2016-12-26 Aiguille de seringue et appareil médical WO2017141548A1 (fr)

Applications Claiming Priority (2)

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JP2016029310 2016-02-18
JP2016-029310 2016-02-18

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WO2017141548A1 true WO2017141548A1 (fr) 2017-08-24

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265870A (ja) * 1988-09-01 1990-03-06 Hakko Denki Seisakusho:Kk 留置針の製造方法
JP2000511809A (ja) * 1996-06-10 2000-09-12 エラン コーポレーション ピーエルシー 流体の皮下送給のためのニードル
JP2003190282A (ja) * 2001-12-27 2003-07-08 Terumo Corp 金属製の管状体およびその製造方法
JP2004248694A (ja) * 2003-02-18 2004-09-09 Terumo Corp 医療用針
JP2005523082A (ja) * 2002-04-16 2005-08-04 イムプリント ファーマスーティカルス リミテッド 側面口付き注射針
JP2007000934A (ja) * 2006-06-22 2007-01-11 Terumo Corp 金属製の管状体およびその製造方法
WO2007059005A2 (fr) * 2005-11-15 2007-05-24 Amgen Inc. Aiguille a ouvertures laterales
WO2015037233A1 (fr) * 2013-09-11 2015-03-19 テルモ株式会社 Ensemble aiguille creuse médicale et procédé de fabrication d'une aiguille creuse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265870A (ja) * 1988-09-01 1990-03-06 Hakko Denki Seisakusho:Kk 留置針の製造方法
JP2000511809A (ja) * 1996-06-10 2000-09-12 エラン コーポレーション ピーエルシー 流体の皮下送給のためのニードル
JP2003190282A (ja) * 2001-12-27 2003-07-08 Terumo Corp 金属製の管状体およびその製造方法
JP2005523082A (ja) * 2002-04-16 2005-08-04 イムプリント ファーマスーティカルス リミテッド 側面口付き注射針
JP2004248694A (ja) * 2003-02-18 2004-09-09 Terumo Corp 医療用針
WO2007059005A2 (fr) * 2005-11-15 2007-05-24 Amgen Inc. Aiguille a ouvertures laterales
JP2007000934A (ja) * 2006-06-22 2007-01-11 Terumo Corp 金属製の管状体およびその製造方法
WO2015037233A1 (fr) * 2013-09-11 2015-03-19 テルモ株式会社 Ensemble aiguille creuse médicale et procédé de fabrication d'une aiguille creuse

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