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WO2013140983A1 - Aiguille médicale - Google Patents

Aiguille médicale Download PDF

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Publication number
WO2013140983A1
WO2013140983A1 PCT/JP2013/055404 JP2013055404W WO2013140983A1 WO 2013140983 A1 WO2013140983 A1 WO 2013140983A1 JP 2013055404 W JP2013055404 W JP 2013055404W WO 2013140983 A1 WO2013140983 A1 WO 2013140983A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
medical needle
needle
cylinder
housing cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/055404
Other languages
English (en)
Japanese (ja)
Inventor
寺澤祐哉
大津順一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Publication of WO2013140983A1 publication Critical patent/WO2013140983A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a medical needle used for blood collection, blood transfusion, infusion, and the like.
  • a medical needle In blood collection, blood transfusion, infusion, etc., medical needles are known that are used by connecting to blood bags, blood collection devices of blood processing circuits (component blood collection circuits, hemodialysis circuits, etc.), blood transfusion sets, infusion sets, and the like.
  • Such a medical needle is generally composed of a needle body having a sharp needle tip at the tip and a hub provided at the proximal end of the needle body.
  • a medical needle provided with a protector that can cover a used needle body has been proposed (see, for example, Japanese Patent No. 3134920).
  • a winged indwelling needle (medical needle) disclosed in Japanese Patent No. 3134920 includes a cannula (needle body), a hub provided at the proximal end of the cannula, and a holding cylinder (not shown) that accommodates and holds the hub therein. Protector), and can slide along the inner wall of the holding cylinder from a first position where the tip of the cannula supported by the hub protrudes from the tip of the holding cylinder to a second position accommodated in the holding cylinder, A first engaging means for releasably locking the hub at the first position of the holding cylinder between the hub and the holding cylinder; and a hub substantially non-releasably locked at the second position of the holding cylinder. Second engagement means is provided.
  • the body of the medical needle (the holding cylinder in Japanese Patent No. 3134920) is picked with a finger and the needle is punctured into the patient's skin.
  • the body portion of the medical needle has an appropriately small diameter, the user can easily pick the body portion, so that the needle tip is easily stabilized, and a hard blood vessel or a thin blood vessel is easily punctured.
  • the winged indwelling needle disclosed in the above-mentioned Japanese Patent No. 3134920 has a structure in which the distal end of the hub is inserted to the position of the distal end of the retaining cylinder in the state of use. It is difficult to make a thin.
  • the present invention has been made in consideration of such problems, and an object of the present invention is to provide a medical needle that can improve operability by thinning the body portion.
  • a medical needle according to the present invention includes a needle body having a needle tip at a distal end, a shaft provided at a proximal end of the needle body, a first tube portion, and the first tube.
  • a second tube portion provided at a base end of the portion and disposed on the inner side so that the shaft is displaceable in an axial direction, and a housing cylinder provided with a first side hole in the second tube portion;
  • a release lever that is swingably fixed to the storage cylinder at an intermediate position in the axial direction of the storage cylinder and that is disposed outside the storage cylinder, and is provided on the release lever via the first side hole.
  • a locking member having an engaging portion that is releasably engaged with the shaft, and the shaft has a tip protruding from the housing cylinder by a predetermined length with respect to the housing cylinder, and the shaft From the first position where the tip of the shaft is disposed in the second pipe portion, the tip of the needle body Is slidable to a second position accommodated in the accommodating cylinder, and the engagement portion engages with the shaft, whereby the shaft is locked at the first position with respect to the accommodating cylinder.
  • the engagement between the engagement portion and the shaft is released when the engagement portion is displaced outward as the release lever is pressed inward.
  • the distal end of the shaft is conventionally In spite of the configuration that is disposed at a position shifted to the base end side compared to the technique, it is possible to prevent the entire length of the medical needle from being increased.
  • operativity can be improved by making a trunk part thin, without lengthening full length.
  • the lock member may have two release levers on opposite sides of the shaft.
  • the engaging portion is engaged so as to be held from both sides of the shaft, a high engaging force can be obtained and the engagement portion and the shaft can be engaged unless the engagement releasing portion is pressed inward.
  • the combined state can be reliably maintained.
  • the lock member further includes a connecting portion that interconnects the two release levers, and the connecting portion is fixed in the receiving cylinder and is provided in the receiving cylinder.
  • the two release levers may be supported through two side holes.
  • connection part fixed to a storage cylinder supports two release levers, while being able to fix a lock member firmly with respect to a storage cylinder
  • the lock member containing two release levers is single. It can be configured as a part.
  • the lock member may be made of a material that is more easily deformed than the housing cylinder.
  • the operation force required for the engagement release operation between the lock member and the shaft can be reduced, and the operability can be improved.
  • the two release levers of the lock member may be displaced with the elastic deformation of the connecting portion.
  • the engagement state between the lock member and the shaft can be stably maintained, and when the release lever is pressed inward, the connecting portion is The release lever can be reliably displaced by elastic deformation.
  • the storage cylinder is configured by a half-cracked first member and a second member that are divided vertically, and the connecting portion is one of the first member and the second member. And may be bent or curved along an inner peripheral portion of the first member and the second member on the side where the fixing portion is provided.
  • the body portion of the medical needle can be assembled by stacking the shaft, the lock member, the first member, and the second member in the vertical direction, so that the assembly workability is excellent and the productivity is improved. Contribute to.
  • the engagement portion protrudes from the inner peripheral surface of the storage cylinder after the engagement between the engagement portion and the shaft is released on the storage tube or the lock member.
  • An anti-return protrusion may be provided to prevent this.
  • an operation portion that is operated by a user is provided at a proximal end of the shaft, and the operation portion is an elastic member that extends in a distal direction and extends opposite to the housing cylinder.
  • a deformable plate-like operation arm may be provided, and the operation arm may press the release lever inward when the operation arm is pressed to the housing cylinder side.
  • both the pressing operation for releasing the engagement between the lock member and the shaft and the pulling operation for moving the shaft in the proximal direction with respect to the housing cylinder are continuously performed as operations on the operation unit. Since it can be performed, it is excellent in operability.
  • the operation arm is configured in a plate shape, the pressing operation force required when releasing the engagement between the lock member and the shaft can be easily reduced by setting the operation arm appropriately long. .
  • the medical needle may be configured as a winged needle having a wing shaft portion surrounding the first tube portion and a pair of wings protruding in opposite directions from the wing shaft portion. Good.
  • the wing shaft portion surrounding the first tube portion can also be made thin.
  • the needle tip of the needle body tends to be stable during an operation of picking the wing shaft portion through the root portion of the folded wing and puncturing the needle body into the living body. Therefore, a medical needle excellent in operability can be provided.
  • the operability can be improved by narrowing the body part.
  • FIG. 1 is an overall perspective view of a medical needle according to an embodiment of the present invention. It is a whole perspective view of a medical needle in a state where a needle body is accommodated in an accommodation cylinder. It is a disassembled perspective view of a medical needle. It is a perspective view which shows the accommodation cylinder of a medical needle. It is a perspective view which shows the locking member of a medical needle.
  • FIG. 6A is a longitudinal sectional view showing an engaged state between the lock member and the shaft
  • FIG. 6B is a longitudinal sectional view showing a disengaged state between the lock member and the shaft. It is sectional drawing which shows the engagement structure of the shaft in a medical needle of the state shown in FIG. 2, and an accommodating cylinder, and its peripheral site
  • FIG. 1 and 2 are overall perspective views showing a configuration of a medical needle 10 according to an embodiment of the present invention.
  • the medical needle 10 is in a state where the needle body 12 protrudes from the housing cylinder 16 by a predetermined length, and in FIG. 2, the needle body 12 is housed in the housing cylinder 16.
  • FIG. 3 is an exploded perspective view of the medical needle 10.
  • the medical needle 10 is configured as a winged needle that is fixed and used while being punctured into the patient's skin during blood collection, blood transfusion, infusion, or the like.
  • this invention is applicable not only to a winged needle but the other kind of medical needle 10, for example, the indwelling needle etc. which are used when performing continuous intravenous infusion.
  • the medical needle 10 configured as a winged needle includes a needle body 12, a hub 14, a housing cylinder 16, a lock member 18, and a wing member 20.
  • the needle body 12 is a portion that is punctured into the skin of a patient undergoing treatment such as blood sampling, blood transfusion, and fluid transfusion, and is made of, for example, a metal material such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, and the like.
  • a sharp needle tip 12a is formed at the tip.
  • the needle body 12 is configured in a circular tube shape having a hollow portion serving as a flow path for body fluid such as blood or infusion.
  • An opening 12 b that functions as a liquid inlet / outlet is formed at the tip of the needle body 12.
  • the cap 22 Prior to use of the medical needle 10, the cap 22 is attached to the medical needle 10.
  • the cap 22 is formed in a hollow cylindrical shape that can accommodate the needle body 12 therein, and is fitted to the distal end side of the wing member 20 on the proximal end side so that the medical needle is covered with the needle body 12. 10 can be mounted. When using the medical needle 10, the cap body 22 can be pulled away from the wing member 20 to expose the needle body 12.
  • the hub 14 is connected to the proximal end of the needle body 12 and supports the needle body 12.
  • the hub 14 is connected to the proximal end of the needle body 12 coaxially with the needle body 12, and a hollow shaft 24 whose hollow portion communicates with the lumen of the needle body 12, and the proximal end of the shaft 24.
  • an operation unit 26 fixed in the vicinity.
  • the proximal end of the needle body 12 is inserted and fixed at the distal end of the shaft 24.
  • the shaft 24 is configured to have a larger diameter than the needle body 12.
  • an annular protrusion 28 that bulges outward in the radial direction and extends over one circumference in the circumferential direction is provided at the tip of the shaft 24.
  • the protrusion 28 is a portion that engages with the elastic engagement pieces 30, 30 provided on the housing cylinder 16 when the shaft 24 comes to a retracted position (a second position described later) with respect to the housing cylinder 16. It is.
  • another shape of protrusion that protrudes in a direction orthogonal to the axis of the shaft 24 may be provided in a partial range of the shaft 24 in the circumferential direction.
  • the protruding portion 28 or the protruding portion having another shape may be provided at a position slightly shifted to the proximal end side with respect to the distal end of the shaft 24 instead of the distal end of the shaft 24.
  • Two engagement grooves 34 are provided on both left and right side portions of the shaft 24 in the longitudinal direction (in the illustrated example, near the center in the longitudinal direction).
  • the engaging grooves 34 and 34 have a groove shape in which the outer peripheral portion of the shaft 24 is partially cut out in the circumferential direction, but instead of the engaging grooves 34 and 34 having such a configuration, the shaft An annular engagement groove that goes around the outer periphery of 24 may be provided.
  • the left and right engaging grooves 34 are provided at the same position in the axial direction of the shaft 24, but may be provided at positions shifted from each other in the axial direction of the shaft 24.
  • a tube connecting portion 36 that can be connected to a tube (not shown) connected to an infusion bag, a blood bag, or the like is provided.
  • a flange portion 38 bulging in the radial direction is provided on the distal end side of the tube connecting portion 36.
  • a reduced diameter portion 40 is provided between the guide groove 32 and the flange portion 38, which is narrower than its front and rear portions.
  • the operation unit 26 is a part that the user picks with fingers and performs a pressing operation and a backward operation.
  • the operation portion 26 includes a base portion 44 in which a notch-like fitting groove is formed to be fitted to the reduced diameter portion 40, and extends from the outer end (left and right ends) of the base portion 44 toward the distal end of the medical needle 10 and the shaft 24.
  • a pair of operation arms 46a and 46b that can be elastically deformed in the radial direction (left and right direction in the illustrated example).
  • Each of the operation arms 46a and 46b is a plate-like portion that extends away from the outer peripheral surface of the receiving cylinder 16 so as to face the outer peripheral surface. (The direction in which the pair of operation arms 46a and 46b approach each other) can be elastically displaced.
  • Each of the operation arms 46a and 46b is provided with a groove for preventing slip on the outer surface side of the tip, and the inner surface in the vicinity of the tip is opposed to the release levers 63a and 63b of the lock member 18.
  • the operation arms 46a and 46b are pressed inward (inward in the radial direction of the shaft 24).
  • the pressing operation force required for the engagement release operation is related to the material, plate thickness, width, length, and the like of the operation arms 46a and 46b. Therefore, the material, plate thickness, width, length, etc. of the operation arms 46a, 46b are related with a small operation force when the operation arms 46a, 46b are pressed to release the engagement between the lock member 18 and the shaft 24. It is good to set so that you can cancel.
  • the operation unit 26 further includes an upper plate 47 extending from the upper end of the base 44 toward the distal end of the medical needle 10.
  • the upper plate 47 has a size (width and length) that covers a portion (a base end portion of the storage tube 16) between the two operation arms 46 a and 46 b of the storage tube 16, and the outer periphery of the storage tube 16. It faces away from the surface.
  • An arrow-shaped mark 49 is provided on the upper surface of the operation unit 26 to indicate the operation direction of the operation unit 26 when the needle body 12 is stored in the storage cylinder 16.
  • the constituent materials of the shaft 24 and the operation unit 26 are not particularly limited.
  • examples thereof include butadiene-styrene copolymers, polyesters such as polyethylene terephthalate and polyethylene naphthalate, butadiene-styrene copolymers, polyamides (for example, nylon 6, nylon 6,6, nylon 6,10, nylon 12) and the like.
  • the housing cylinder 16 includes a first pipe portion 48 that constitutes the distal end side of the housing cylinder 16, and a shaft 24 that is provided at the base end of the first pipe portion 48 and that has an axial direction inside. And a second pipe part 50 disposed so as to be displaceable.
  • the housing cylinder 16 is configured to cover the needle tip 12 a of the needle body 12 when the shaft 24 is retracted to a predetermined position with respect to the housing cylinder 16. That is, the storage cylinder 16 functions as a protector that covers the needle tip 12 a of the needle body 12 after the use of the medical needle 10.
  • the accommodating cylinder 16 is fitted and fixed inside the wing shaft 88 of the wing member 20 in a predetermined range near the tip (in the present embodiment, a portion of the first pipe portion 48).
  • the housing cylinder 16 includes a first member 52 a and a second member 52 b that are divided into upper and lower parts, and includes a first member 52 a and a second member 52 b.
  • a lumen 53 that penetrates in the axial direction and through which the needle body 12 can be inserted is formed.
  • the lumen provided in the housing cylinder 16 includes a first lumen 53 a formed in the first tube portion 48 and a second lumen 53 b formed in the second tube portion 50. Become.
  • the inner diameter of the second lumen 53b is larger than the inner diameter of the first lumen 53a.
  • the first tube portion 48 is a relatively thin portion disposed inside the wing shaft portion 88.
  • the second pipe part 50 is configured to be thicker (larger in diameter) than the first pipe part 48, and the shaft 24 is disposed inside the second pipe part 50 so as to be displaceable in the axial direction.
  • the shaft 24 has a first position where the distal end of the needle body 12 protrudes from the housing cylinder 16 by a predetermined length with respect to the housing cylinder 16 and the distal end of the shaft 24 is disposed in the second pipe portion 50 (see FIG. 1). Then, the tip of the needle body 12 can be slid to the second position (see FIG. 2) where the tip of the needle body 12 is housed in the housing cylinder 16.
  • First side holes 55 and 55 that communicate between the inside and the outside of the second pipe part 50 are provided on the left and right side parts of the second pipe part 50.
  • the 1st side holes 55 and 55 are provided in the substantially exact opposite position in the storage cylinder 16 (2nd pipe part 50).
  • the first side holes 55 and 55 are formed by notch-like recesses 82 and 82 (see also FIG. 3) provided in the first member 52a and notch-like recesses 83 and 83 (see FIG. 3) provided in the second member 52b. 3).
  • a fixing portion 58 for positioning the lock member 18 in the axial direction is provided at an intermediate position in the axial direction of the second pipe portion 50.
  • the fixing portion 58 is an arc-shaped groove 58a extending in the circumferential direction at the inner peripheral portion of the second member 52b, and the lock member 18 having a similar arc shape is connected to the arc-shaped groove 58a.
  • a portion 66 is arranged.
  • second side holes 85 and 85 that communicate between the inside and the outside of the housing cylinder 16 are provided at locations (left and right side portions) corresponding to both ends of the arc-shaped groove 58 a.
  • the second side holes 85 and 85 are provided at substantially opposite positions in the housing cylinder 16 (second pipe portion 50).
  • the second side holes 85 and 85 are formed by notched concave portions 86 and 86 provided in the first member 52a and notched concave portions 87 and 87 provided in the second member 52b.
  • the lock member 18 is fixed to the housing cylinder 16 so as to be swingable at an intermediate position in the axial direction of the housing cylinder 16 and is disposed on the outer side of the housing cylinder 16.
  • 63b, and engagement portions 64a and 64b that are provided on the release levers 63a and 63b and are releasably engaged with the shaft 24 via the first side holes 55 and 55.
  • two release levers 63a and 63b and two engaging portions 64a and 64b are provided, and a connecting portion 66 that interconnects the two release levers 63a and 63b between the two release levers 63a and 63b. Is provided.
  • the connecting portion 66 is fixed in the housing cylinder 16 and supports the two release levers 63 a and 63 b via second side holes 85 and 85 provided in the housing cylinder 16.
  • the two release levers 63a and 63b, the two engaging portions 64a and 64b, and the connecting portion 66 are integrally molded to constitute a single lock member 18.
  • the connecting portion 66 supports the release levers 63a and 63b on the inner surfaces of the release levers 63a and 63b (surfaces facing the housing cylinder 16) in the middle of the release levers 63a and 63b.
  • the release levers 63a and 63b are swingable with the portion as a fulcrum.
  • the engaging portions 64a and 64b have a shape bent inward at the ends of the release levers 63a and 63b, and the engaging grooves 34 and 34 of the shaft 24 at the first position are formed at the inner ends 65 and 65 thereof. Can be engaged.
  • the engagement portions 64a and 64b are engaged after the engagement between the engagement portions 64a and 64b and the engagement grooves 34 and 34 is released (after the engagement portions 64a and 64b are displaced outward).
  • Return prevention protrusions 67 and 67 for preventing the portions 64a and 64b from being displaced inward again and projecting from the inner peripheral surface of the housing cylinder 16 are provided.
  • the return prevention protrusion 67 is provided on the front surface of the engaging portions 64a and 64b, but may be provided on the other surface of the engaging portions 64a and 64b as long as the above function can be achieved. . Further, in the present embodiment, the return prevention protrusions 67 and 67 are located inside the housing cylinder 16 (second lumen 53b) in a state where the engaging portions 64a and 64b are engaged with the engaging grooves 34 and 34, respectively. May be provided so as to be located in the first side holes 55, 55.
  • the release levers 63a and 63b are moved by the operating arms 46a and 46b.
  • the direction is changed (tilted) with both ends of the connecting portion 66 as fulcrums.
  • the connecting portion 66 bends due to elastic deformation, the proximal ends of the release levers 63a and 63b are displaced inward with respect to both ends of the connection portion 66, and the distal ends of the release levers 63a and 63b are outward. Displace.
  • the engagement portions 64a and 64b are disengaged from the engagement grooves 34 and 34, that is, the engagement between the engagement portions 64a and 64b and the engagement grooves 34 and 34 is released.
  • the movement of the shaft 24 in the axial direction with respect to the housing cylinder 16 is allowed.
  • the shaft 24 can be released to the first position with respect to the housing cylinder 16 by the engaging portions 64 a and 64 b of the lock member 18 and the engaging grooves 34 and 34 of the shaft 24.
  • First locking means 39 (see FIG. 6A) to be locked is configured.
  • the number of release levers 63a and 63b (and the engaging portions 64a and 64b) provided on the lock member 18 is not limited to two, and may be only one. In this case, the number of the first side holes 55 provided in the housing cylinder 16 and the engagement groove 34 provided in the shaft 24 are only one.
  • elastic engagement pieces 30, 30 are provided in the vicinity of the base end portion of the housing cylinder 16 at positions facing each other. Specifically, one elastic engagement piece 30 is provided on the first member 52a, and the other elastic engagement piece 30 is provided on the second member 52b. In the present embodiment, an opening 33 is provided in the vicinity of the base end portions of the first member 52 a and the second member 52 b, and the elastic engagement pieces 30, 30 are formed from the side portion on the tip end side of the opening 33. Project in the end direction. Note that only one elastic engagement piece 30 may be provided.
  • the elastic engagement pieces 30, 30 each have a tapered surface 84 that is inclined so as to approach the inside of the storage cylinder 16 toward the proximal direction inside the storage cylinder 16.
  • the protrusion 28 provided on the shaft 24 presses the elastic engagement piece 30 outward.
  • the elastic engagement piece 30 is elastically deformed outward (outward in the radial direction of the housing cylinder 16), so that the protrusion 28 gets over the elastic engagement piece 30.
  • the shaft 24 opposes the elastic engagement pieces 30, 30 at the second position displaced to the most proximal side with respect to the housing cylinder 16. Between the wall portions 31, 31, the movement in the axial direction is prevented with respect to the housing cylinder 16.
  • the second lock that causes the shaft 24 to be substantially unreleasably locked at the second position with respect to the housing cylinder 16 by the elastic engagement pieces 30 and 30, the wall portions 31 and 31, and the projection portion 28.
  • Means 41 are configured.
  • the constituent material of the housing cylinder 16 and the lock member 18 described above is not particularly limited, and for example, one or more materials selected from those exemplified as the constituent materials of the shaft 24 and the operation unit 26 described above may be employed. Further, if the lock member 18 is more easily deformed than the housing cylinder 16, that is, if it is made of a soft material (for example, polyacetal), the connecting portion 66 of the lock member 18 is easily elastically deformed with a small force. When the engagement between the member 18 and the shaft 24 is released, the pressing operation force on the operation arms 46a and 46b can be reduced, and the operability can be improved.
  • a soft material for example, polyacetal
  • the wing member 20 includes a hollow wing shaft portion 88 and a pair of wings 90 a and 90 b projecting left and right from the wing shaft portion 88.
  • the wings 90a and 90b are formed in a plate shape that is coupled to the wing shaft portion 88 at the root portion and becomes wider from the root portion toward the outer end.
  • the wings 90a and 90b have flexibility, and are configured to be openable and closable by bending or bending near the root.
  • Thin portions 92a and 92b are formed in the vicinity of the base portions of the wings 90a and 90b so as to facilitate opening and closing.
  • the upper surface of one wing 90a is provided with a plurality (two in the illustrated example) of convex portions 94
  • the upper surface of the other wing 90b is provided with a plurality of (two in the illustrated example) concave portions as the convex portions 94.
  • 96 is provided, and when the pair of wings 90a and 90b are closed (folded), the convex portion 94 and the concave portion 96 are fitted.
  • One convex portion 94 and one concave portion 96 may be provided.
  • the wing shaft portion 88 and the wings 90a and 90b in the illustrated example are integrally formed. However, the wing shaft portion 88 and the wings 90a and 90b are formed separately and combined to form the wing member 20. Good. Although it does not specifically limit as a constituent material of the wing axial part 88 and wings 90a and 90b, For example, the 1 or more types of material selected from what was illustrated as constituent materials, such as the accommodating part mentioned above, can be employ
  • the wing shaft portion 88 is made of a material having high rigidity so as not to bend during use, and the wings 90a and 90b are flexible so that the root portion can be bent and can be easily opened and closed. You may comprise with material.
  • the wing member 20 in which the wing shaft portion 88 and the wings 90a and 90b are integrally formed can be manufactured, for example, by two-color molding using a resin material having a relatively high rigidity and a resin material having a relatively low rigidity.
  • the medical needle 10 according to the present embodiment is basically configured as described above, and the operation and effect will be described below.
  • the cap 22 is removed from the medical needle 10 to expose the needle body 12.
  • the pair of wings 90a and 90b are picked with fingers and closed (folded). Specifically, the bases of both wings 90a, 90b are bent and closed so that one wing 90a and the other wing 90b overlap.
  • the convex part 94 provided in one wing 90a and the concave part 96 provided in the other wing 90b are fitted to each other, thereby preventing mutual displacement.
  • the needle body 12 When the wings 90a and 90b are in the closed state, the needle body 12 is punctured into the living body while holding the closed wings 90a and 90b with fingers. At this time, as shown in FIG. 6A, the engaging portions 64 a and 64 b of the lock member 18 are engaged with the engaging grooves 34 and 34 provided in the shaft 24. The movement in the axial direction is blocked. That is, the needle body 12 is prevented from moving backward with respect to the housing cylinder 16 and the wing member 20 fixed thereto. For this reason, the needle body 12 does not move backward with respect to the housing cylinder 16 due to the puncture resistance when the wing member 20 is picked with a finger and the needle body 12 is punctured into the living body.
  • the wings 90a and 90b are returned to the opened state, and the wings 90a and 90b are fixed to the skin with an adhesive tape or the like.
  • the engagement between the engagement portions 64a and 64b and the engagement grooves 34 and 34 is released, and the shaft 24 is movable in the proximal direction with respect to the storage cylinder 16.
  • the two operation arms 46a and 46b of the operation unit 26 are pressed inward (side of the housing cylinder 16).
  • the release levers 63a and 63b of the lock member 18 facing the inside of the operation arms 46a and 46b are pressed inward by the operation arms 46a and 46b, thereby supporting the release levers 63a and 63b.
  • the release levers 63a and 63b (specifically, the portion on the base end side relative to the fulcrum of the release levers 63a and 63b) are displaced inward, The engaging portions 64a and 64b are displaced outward. As a result, as shown in FIG. 6B, the engagement between the engagement portions 64a and 64b and the engagement grooves 34 and 34 is released.
  • the engagement portions 64a and 64b are provided with the return prevention protrusions 67.
  • the operation unit 26 is pulled in the proximal direction with respect to the housing cylinder 16 in a state where the engagement between the engagement portions 64a and 64b and the engagement grooves 34 and 34 is released. Then, the needle body 12 fixed to the distal end of the hub 14 is displaced in the proximal direction with respect to the housing cylinder 16. Even when the operating arms 46a and 46b are not pressed inward, the engagement between the engaging portions 64a and 64b and the engaging grooves 34 and 34 is maintained by the action of the return preventing projection 67. The Therefore, the user can displace the operation unit 26 in the proximal direction without pressing the operation arms 46a and 46b inward.
  • the engaging portions 64 a and 64 b do not contact the outer peripheral surface of the shaft 24 while the operation portion 26 is displaced in the proximal direction, frictional resistance due to contact between the engaging portions 64 a and 64 b and the shaft 24 may occur. Therefore, the operation of moving the operation unit 26 in the proximal direction can be performed smoothly.
  • the needle body 12 In the state where the hub 14 is moved to the most proximal side with respect to the housing cylinder 16, the needle body 12 is located inside the housing cylinder 16 (specifically, inside the first pipe portion 48). As shown in FIG. 2, when the shaft 24 moves to a predetermined retracted position (second position), the action of the second locking means 41 (see FIG. 7) described above causes the shaft 24 to move forward relative to the housing cylinder 16. Movement is prevented. Therefore, the needle body 12 does not protrude from the tip of the housing cylinder 16 again. Further, since the second locking means 41 prevents the backward movement of the shaft 24 with respect to the housing cylinder 16, the needle body 12 is effectively prevented from being pulled out from the proximal end of the housing cylinder 16.
  • the distal end of the shaft 24 when the shaft 24 comes to the most distal side of the movable range is more proximal than the first tube portion 48 of the housing cylinder 16. Since it is in the 2nd pipe part 50 of the side, the 1st pipe part 48 of the accommodation cylinder 16 is easy to comprise. That is, since the shaft 24 is not inserted into the first tube portion 48 that constitutes the distal end side of the housing cylinder 16, the outer diameter of the first tube portion 48 can be set to be reduced accordingly. For this reason, the trunk
  • the shaft 24 is adopted by adopting a configuration in which the lock member 18 is disposed not on the proximal end of the housing cylinder 16 but on the distal end side (an intermediate portion in the axial direction of the housing cylinder 16).
  • the distal end of the medical needle 10 is arranged at a position shifted to the proximal end side as compared with the prior art, it is possible to prevent the entire length of the medical needle 10 from being increased.
  • the medical needle 10 according to the present invention the operability can be improved by thinning the trunk without increasing the overall length.
  • the lock member 18 has two release levers 63a and 63b on opposite sides with respect to the shaft 24, so that the engaging portions 64a and 64b are engaged so as to be held from both sides of the shaft 24. Therefore, a high engagement force can be obtained, and the engagement state between the engagement portions 64a and 64b and the shaft 24 can be reliably maintained unless the engagement release portion is pressed inward.
  • the connecting portion 66 that interconnects the two release levers 63 a and 63 b is fixed in the housing cylinder 16 and via the second side holes 85 and 85 provided in the housing cylinder 16. Two release levers 63a and 63b are supported. With this configuration, since the connecting portion 66 fixed to the storage cylinder 16 supports the two release levers 63a and 63b, the lock member 18 can be firmly fixed to the storage cylinder 16 and the two release levers 63a and 63b.
  • the lock member 18 including can be configured compactly as a single part.
  • the lock member 18 is made of a material that is more easily deformed than the housing cylinder 16, so that the operation force required for the disengagement operation between the lock member 18 and the shaft 24 can be reduced. Can be improved.
  • the housing cylinder 16 is composed of a first member 52a and a second member 52b that are divided into upper and lower parts, and the connecting portion 66 of the lock member 18 is the inner periphery of the second member 52b. It has a shape that is bent or curved along the portion, and is disposed in the fixed portion 58 that is formed by the arc-shaped groove 58a provided in the second member 52b. According to this configuration, the body part of the medical needle 10 can be assembled by sequentially stacking the first member 52a, the lock member 18, the shaft 24, and the second member 52b. Contributes to improved productivity.
  • fixed part 58 of the locking member 18 was provided in the 1st member 52a
  • fixed part 58 of the locking member 18 may be provided in the 2nd member 52b side as a modification.
  • the lock member 18 is disposed upside down from the direction shown in FIG.
  • the lock member 18 may be arranged in the reverse direction from the direction shown in FIG.
  • both of the pressing operation for releasing the engagement between the lock member 18 and the shaft 24 and the pulling operation for moving the shaft 24 in the proximal direction with respect to the housing cylinder 16 are performed on the operation unit 26. Therefore, it is excellent in operability.
  • the operation arms 46a and 46b are configured in a plate shape, the pressure required for releasing the engagement between the lock member 18 and the shaft 24 by setting the operation arms 46a and 46b to be appropriately long. The operating force can be easily reduced.
  • the medical needle 10 is configured as a winged needle having a wing shaft portion 88 and a pair of wings 90a and 90b.
  • the wing shaft portion 88 surrounding the first tube portion 48 can also be made thin.
  • the needle tip 12a of the needle body 12 is likely to be stabilized during the operation of picking the wing shaft portion 88 over the root portions of the folded wings 90a and 90b and puncturing the needle body 12 into the living body. Therefore, a winged needle excellent in operability can be provided.

Landscapes

  • 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)
PCT/JP2013/055404 2012-03-21 2013-02-28 Aiguille médicale Ceased WO2013140983A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012063023 2012-03-21
JP2012-063023 2012-03-21

Publications (1)

Publication Number Publication Date
WO2013140983A1 true WO2013140983A1 (fr) 2013-09-26

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PCT/JP2013/055404 Ceased WO2013140983A1 (fr) 2012-03-21 2013-02-28 Aiguille médicale

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WO (1) WO2013140983A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515513A3 (de) * 2014-02-25 2016-03-15 Braun Melsungen Ag Kathetervorrichtung und zugehörige verfahren
WO2016107028A1 (fr) * 2015-01-04 2016-07-07 上海金塔医用器材有限公司 Aiguille de ponction de méridiens biplan anti-piqûre

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001309976A (ja) * 2000-05-01 2001-11-06 Jms Co Ltd 翼付き注射針装置
JP2003180829A (ja) * 2001-10-24 2003-07-02 Becton Dickinson & Co 伸縮自在の針アセンブリ
JP2007519474A (ja) * 2004-01-28 2007-07-19 スペシャライズド・ヘルス・プロダクツ・インコーポレーテッド バイオプシー針装置
JP2009509587A (ja) * 2005-09-22 2009-03-12 タイコ・ヘルスケアー・グループ・エルピー 安全針用の軸線上に配置されない戻しばね

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001309976A (ja) * 2000-05-01 2001-11-06 Jms Co Ltd 翼付き注射針装置
JP2003180829A (ja) * 2001-10-24 2003-07-02 Becton Dickinson & Co 伸縮自在の針アセンブリ
JP2007519474A (ja) * 2004-01-28 2007-07-19 スペシャライズド・ヘルス・プロダクツ・インコーポレーテッド バイオプシー針装置
JP2009509587A (ja) * 2005-09-22 2009-03-12 タイコ・ヘルスケアー・グループ・エルピー 安全針用の軸線上に配置されない戻しばね

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515513A3 (de) * 2014-02-25 2016-03-15 Braun Melsungen Ag Kathetervorrichtung und zugehörige verfahren
AT15219U1 (de) * 2014-02-25 2017-03-15 Braun Melsungen Ag Kathetervorrichtung
WO2016107028A1 (fr) * 2015-01-04 2016-07-07 上海金塔医用器材有限公司 Aiguille de ponction de méridiens biplan anti-piqûre

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