WO2018181728A1 - 留置針組立体 - Google Patents

留置針組立体 Download PDF

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Publication number
WO2018181728A1
WO2018181728A1 PCT/JP2018/013286 JP2018013286W WO2018181728A1 WO 2018181728 A1 WO2018181728 A1 WO 2018181728A1 JP 2018013286 W JP2018013286 W JP 2018013286W WO 2018181728 A1 WO2018181728 A1 WO 2018181728A1
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WO
WIPO (PCT)
Prior art keywords
switch
inner needle
needle
base
needle base
Prior art date
Application number
PCT/JP2018/013286
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English (en)
French (fr)
Japanese (ja)
Inventor
一成 河内
Original Assignee
株式会社トップ
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 株式会社トップ filed Critical 株式会社トップ
Publication of WO2018181728A1 publication Critical patent/WO2018181728A1/ja

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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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • 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 an indwelling needle assembly including an indwelling needle that is punctured into a blood vessel or the like and used for connection with an infusion line or the like.
  • an indwelling needle that inserts an inner needle into an outer needle, guides the inner needle to puncture the outer needle into a blood vessel, etc., and then removes the inner needle and connects the infusion line to the placed outer needle.
  • the conventional indwelling needle when the inner needle is removed from the outer needle, the patient's blood flows out from the outer needle placed in the blood vessel and adheres to the doctor or nurse, or the removed inner needle is attached to the doctor or nurse. In some cases, puncture may occur accidentally.
  • tubular outer needle and the outer needle base to which the proximal end portion of the outer needle is fixed, the inner needle that can be inserted into the outer needle and the outer needle base, and the proximal end portion of the inner needle are fixed.
  • An indwelling needle assembly is known that includes a moving member that can move from the outer needle to a second position in the needle tip direction of the outer needle and a spring that biases the inner needle base toward the proximal end of the housing ( For example, see Patent Document 1).
  • the movement preventing portion prevents the inner needle base from moving in the radial direction in the housing when the moving member is in the first position.
  • a pressing portion that presses the inner needle base in the radial direction in the housing and moves the inner needle base in the radial direction.
  • the removed inner needle is housed in the housing, so that blood scattering when the inner needle is removed from the outer needle and erroneous puncture of the inner needle to the doctor or nurse are prevented. Can be prevented.
  • an object of the present invention is to provide an indwelling needle assembly capable of performing a more stable procedure while preventing malfunctions in view of the problems of the related art.
  • An indwelling needle assembly includes a tubular outer needle, an outer needle base to which a proximal end portion of the outer needle is fixed, an inner needle that can be inserted into the outer needle and the outer needle base, An inner needle base to which the proximal end portion of the inner needle is fixed, a cylindrical housing that accommodates the inner needle base so as to be movable in the axial direction and the radial direction, and the outer needle base is detachably held at the distal end portion.
  • a movable member that can move from a predetermined first position to a second position in the needle tip direction of the outer needle with respect to the housing; and an urging force that biases the inner needle base toward the proximal end of the housing.
  • a biasing member and a switch that is movable with respect to the housing from a predetermined third position to a fourth position in a direction opposite to the needle tip of the outer needle, and the moving member is in the first position.
  • the inner needle base has a movement blocking portion for blocking the movement of the inner needle base in the radial direction, and the inner needle base has the movement member in the first position.
  • the movement preventing portion When it is locked to the housing against the urging force by the urging member, the movement preventing portion is prevented from moving in the radial direction, and the moving member is moved to the second position, The movement blocking portion in the radial direction is released by the movement blocking portion, and the switch has a pressing portion that moves the radial direction by pressing the inner needle base in the casing in the radial direction when the switch is in the fourth position.
  • the inner needle base is released in the radial direction in the casing by the pressing portion and moved in the radial direction to release the engagement with the casing, and the biasing force of the biasing member
  • the distal end portion of the inner needle is accommodated in the housing by being moved in the proximal direction of the housing.
  • the moving member after holding the housing and puncturing the inner needle and the outer needle in the target site, the moving member is moved to the second position and only the outer needle is advanced to move in the radial direction of the inner needle base.
  • the movement prevention can be released.
  • the lock between the inner needle base and the housing is released, and the biasing member moves the proximal end of the housing.
  • the inner needle can be stored in the housing without need.
  • release of movement prevention of the inner needle base in the radial direction and release of engagement between the inner needle base and the housing are divided into operations of the moving member and the switch, respectively.
  • the retraction of the needle is activated, and an unexpected impact can be prevented.
  • both the moving member and the switch are moved along the axial direction of the outer needle, the needle tip of the outer needle can be prevented from shaking in the radial direction during the procedure.
  • a locked portion to be locked to the housing on the outer peripheral surface of the inner needle base, a locked portion to be locked to the housing, and a target to be pressed by the pressing portion of the switch on the proximal side from the locked portion.
  • a pressing portion is formed on each inner peripheral surface of the housing; a locking portion that locks the locked portion; and a support portion that supports the inner needle base on the distal side of the locking portion.
  • the biasing member is sandwiched between a support portion of the casing and a locked portion of the inner needle base, and the pressing portion of the switch is inserted into the casing to be inserted into the inner needle.
  • An inclined surface for moving the needle base in the radial direction by pressing the needle base in the radial direction is formed, and in the moving member, the movement blocking portion sandwiches the inner needle base. It is preferably positioned on the opposite side of the pressing portion.
  • the indwelling needle assembly described above can be realized with a simple configuration, and the pressing portion of the switch is inserted into the housing and disposed between the locked portion and the pressed portion of the inner needle base. Therefore, the indwelling needle assembly can be arranged in the order of the support portion of the housing, the urging member, the locked portion of the inner needle base, the locking portion of the housing, the pressing portion of the switch, and the pressed portion of the inner needle base. The total length of the solid can be shortened.
  • the moving member has a moving member operation unit that can be hooked when the moving member is moved from the first position to the second position, and the switch connects the switch to the third position.
  • a switch operating portion that can be fingered when moving from a position to the fourth position, and the switch operating portion at the third position is disposed adjacent to a proximal end side of the moving member operating portion at the first position. It is preferred that
  • the thumb or index finger of the hand holding the housing is hung on the moving member operation unit, and the distal direction first After moving to the second position, the finger is returned, the finger is put on the switch operation part adjacent to the original second position and pulled in the proximal direction, thereby removing the inner needle and housing Can be stored. Therefore, the operation of using a plurality of fingers or picking them up during the procedure is unnecessary, and the operation can be easily performed.
  • the moving member has a moving member operation unit that can be hooked when the moving member is moved from the first position to the second position, and the switch connects the switch to the third position.
  • a switch operation unit that can be hooked when moving from a position to the fourth position You may comprise the said switch operation part in a 3rd position so that it may be arrange
  • the thumb or index finger of the hand holding the housing is hung on the moving member operation unit, and the distal direction first
  • the inner needle can be removed and stored in the housing by pulling the finger on the switch operating portion and pulling in the proximal direction. Therefore, the operation of using a plurality of fingers or picking them up during the procedure is unnecessary, and the operation can be easily performed.
  • the movement member operation unit at the third position when the switch operation unit at the third position is disposed between the movement member operation unit at the first position and the movement member operation unit at the second position, the movement member operation unit is separated from the movement member.
  • a column portion extending in the radial direction; and a flange portion extending in a direction intersecting the axial direction and the radial direction from the column portion, and storing the switch operation portion in the first position.
  • the moving member is prevented from rotating in a radial direction by at least one of the casing and the switch.
  • the moving member is configured to form a notch having a cantilever-like shape so that the moving member is prevented from returning to the first position again after moving to the second position. It is preferred that
  • FIG. 1 It is a disassembled perspective view of the indwelling needle assembly which concerns on one Embodiment of this invention. It is a figure which shows the detail of the inner needle base in the indwelling needle assembly of FIG. It is a figure which shows the detail of the stopper in the indwelling needle assembly of FIG. It is a figure which shows the detail of the inner cylinder in the indwelling needle assembly of FIG. It is a figure which shows the detail of the switch in the indwelling needle assembly of FIG. It is a figure which shows the detail of the outer cylinder in the indwelling needle assembly of FIG. It is sectional drawing which shows a mode when the case in the indwelling needle assembly of FIG. 1 moves. It is a figure which shows the base end part of the inner cylinder in a modification.
  • FIG. 1 is an exploded perspective view of an indwelling needle assembly according to an embodiment of the present invention.
  • an indwelling needle assembly 1 includes an indwelling part 2 to be indwelled at a target site, an inner needle 3 to be inserted into the indwelling part 2, and an inner needle to which a proximal end portion of the inner needle 3 is fixed.
  • An inner cylinder 6 that is mounted so as to be slidable to a position, a compression spring S that biases the inner needle base 4 toward the proximal end of the housing 5, and a detained portion from a predetermined third position with respect to the housing 5 And a switch 7 attached so as to be slidable to a fourth position in the direction opposite to the needle tip of the second needle.
  • the inner cylinder 6 constitutes a moving member in the present invention.
  • the compression spring S constitutes an urging member in the present invention.
  • the first position is the position of the inner cylinder 6 in FIG. 7A
  • the second position is the position of the inner cylinder 6 in FIGS. 7B to 7D.
  • the third position is the position of the switch 7 in FIGS. 7A and 7B
  • the fourth position is the position of the switch 7 in FIGS. 7C and 7D.
  • the indwelling unit 2 includes a tubular outer needle 21 and an outer needle base 22 to which a proximal end portion of the outer needle 21 is fixed.
  • the outer needle 21 includes a shaving bamboo-like puncture portion 21a at the tip.
  • the inner needle 3 is inserted into the outer needle 21 and the outer needle base 22 so that the tip protrudes from the tip of the outer needle 21.
  • the housing 5 includes an outer cylinder 8 and a stopper 9 fixed to the outer cylinder 8.
  • a protector 10 is attached to the distal end portion of the housing 5 to protect the indwelling portion 2 and the inner needle 3.
  • FIG. 2 shows the details of the inner needle base 4.
  • 2A is a plan view
  • FIG. 2B is a front view
  • FIG. 2C is a sectional view taken along the line CC of FIG. 2A.
  • the inner needle base 4 is adjacent to the proximal end side of the hollow needle-shaped inner needle fixing portion 41 to which the inner needle 3 is inserted and fixed, and the inner needle fixing portion 41.
  • a hollow cylindrical filter insertion portion 42 having a diameter larger than that of the portion 41.
  • fixed part 41 is the level
  • a locked portion 44 extending along a direction orthogonal to the axis of the inner needle base 4 is provided on the top and the distal end side of the filter insertion portion 42.
  • the front end surface of the locked portion 44 is flush with the stepped portion 43.
  • a protrusion 45 that is pushed downward by the switch 7 when the switch 7 is moved from the third position to the fourth position is provided on the upper side and the base end side of the filter insertion portion 42.
  • the protruding portion 45 is provided with an inclined surface 45a for enabling the pressing.
  • the protrusion part 45 comprises the to-be-pressed part in this invention.
  • the periphery of the filter insertion portion 42 is made of a transparent member so that the blood flashback generated at the filter insertion portion 42 can be visually recognized.
  • a filter (aeration plug) 46 (FIG. 1) that allows only gas to pass and suppresses passage of liquid is inserted into the filter insertion portion 42.
  • FIG. 3 shows details of the stopper 9.
  • 3A is a plan view
  • FIG. 3B is a front view
  • FIG. 3C is a left side view
  • FIG. 3D is a right side view
  • FIG. 3E is a bottom view
  • FIG. 3F is a sectional view taken along line FF in FIG.
  • the stopper 9 includes a partial cylindrical portion 91 that is opened by cutting out a substantially cylindrical bottom surface side, a top plate portion 92 that closes the distal end of the partial cylindrical portion 91, and a base end. And a bottom plate portion 93 to be closed.
  • the outer diameter of the partial cylindrical portion 91 is the same as or slightly smaller than the inner diameter of the inner cylinder 6, and the inner diameter of the partial cylindrical portion 91 is the same as or slightly larger than the inner needle base 4.
  • a rectangular stopper slit portion 94 extending along the longitudinal direction is formed above and on the tip side of the partial cylindrical portion 91.
  • the partial cylindrical portion 91 is formed adjacent to the distal end side of the stopper slit portion 94 with a locking storage portion 95 that is locked in a state where the locked portion 44 of the inner needle base 4 is fitted. .
  • the base end side surface of the locking storage portion 95 supports the distal end surface of the locked portion 44, and the locking portion is released when the inner needle base 4 is swung to a support releasing position described later.
  • 95a is configured.
  • a convex portion 96 is provided adjacent to the proximal end side of the stopper slit portion 94 and slidably fitted into an inner cylinder slit portion 63 of the inner cylinder 6 described later.
  • the top plate portion 92 is configured as an annular and flat plate member.
  • the axis of the ring coincides with the axis of the housing 5.
  • a circular through-hole 92 a into which the inner needle fixing portion 41 of the inner needle base 4 is loosely fitted is formed at the center of the top plate portion 92. Since the hole diameter of the circular through hole 92a is slightly larger than the outer diameter of the inner needle fixing portion 41, the circular through hole 92a is formed so that the inner needle base 4 can be removed in the proximal direction and the inner needle. The distal end side of the inner needle base 4 is loosely supported so that the proximal end side of the base 4 can swing from a predetermined support position described later to a support release position and move in the radial direction.
  • the surface on the base end side of the top plate portion 92 is a support portion 92b that supports the tip of the compression spring S.
  • a concave portion 92c corresponding to a rocking prevention portion 65 of the inner cylinder 6 described later is formed below the top plate portion 92.
  • the bottom plate portion 93 is configured as a disk-like and flat plate-like member having a diameter larger than the outer diameter of the partial cylindrical portion 91.
  • the axis of the disk coincides with the axis of the housing 5.
  • a pair of claw portions 93a extending in parallel with a plane including the axis of the housing 5 and the vertical direction are provided adjacent to each other with the axis interposed therebetween.
  • FIG. 4 shows details of the inner cylinder 6.
  • 4A is a plan view
  • FIG. 4B is a front view
  • FIG. 4C is a left side view
  • FIG. 4D is a right side view
  • FIG. 4E is an EE cross-sectional view of FIG.
  • the inner cylinder 6 is a hollow cylindrical outer needle base mounting portion 61 that is adjacent to the proximal end side of the outer needle base mounting portion 61 and has a larger diameter than the outer needle base mounting portion 61.
  • the cylindrical part 62 of a shape is provided.
  • the outer needle base attachment portion 61 and the cylindrical portion 62 communicate with each other, and their axes coincide with the axis of the housing 5.
  • the outer peripheral surface of the outer needle base mounting portion 61 is detachably mounted with the base end portion of the outer needle base 22 being externally fitted. Further, the inner needle fixing portion 41 of the inner needle base 4 is inserted into the inner peripheral surface of the outer needle base attaching portion 61 so as to advance and retreat.
  • the inner diameter of the cylindrical portion 62 is larger than the outer diameter of the partial cylindrical portion 91 of the stopper 9 and smaller than the diameter of the bottom plate portion 93 of the stopper 9.
  • the outer diameter of the cylindrical portion 62 is approximately the same as the diameter of the bottom plate portion 93 of the stopper 9.
  • a rectangular inner cylinder slit portion 63 extending in the longitudinal direction from the proximal end portion to the distal end side is formed above the cylindrical portion 62.
  • the widths in the short direction of the inner cylinder slit portion 63 and the stopper slit portion 94 of the stopper 9 are formed to be approximately the same.
  • an assembly groove 64 narrower than the inner cylinder slit part 63 is provided between the base end of the inner cylinder slit part 63 and the base end of the cylindrical part 62.
  • a convex swing preventing portion 65 extending from the distal end to the proximal end side is provided below the inner peripheral surface of the cylindrical portion 62.
  • fluctuation prevention part 65 blocks
  • the stopper 9 can be prevented from rotating relative to the inside of the inner cylinder 6 by fitting the swing preventing portion 65 and the recess 92 c of the stopper 9.
  • An inner cylinder operation part 66 for moving the inner cylinder 6 from the first position to the second position is provided at the top and the tip of the cylindrical part 62.
  • the inner cylinder operation portion 66 includes a pair of column portions 66a and 66a provided across a plane extending in the vertical direction including the axis, and a bridging portion 66b connecting the both column portions 66a (the present invention). It is formed in an arch shape.
  • the inner cylinder operation portion 66 is provided with a pair of column portions 66 a and 66 a that are separated from the width of the switch operation portion 74 so that a switch operation portion 74 described later can pass therethrough.
  • the inner cylinder operation unit 66 constitutes the moving member operation unit of the present invention.
  • the base end side of the column portion 66a is a surface inclined slightly upward toward the distal end side so that the inner cylinder 6 can be easily pushed toward the distal end of the casing 5 with the thumb or index finger of the hand holding the casing 5. ing.
  • FIG. 5 shows the details of the switch 7.
  • 5A is a plan view
  • FIG. 5B is a front view
  • FIG. 5C is a left side view
  • FIG. 5D is a right side view
  • FIG. 5E is a bottom view
  • FIG. 5F is a cross-sectional view along AA in FIG.
  • the switch 7 includes a rectangular upper plate member 71 extending along the longitudinal direction, a rectangular lower plate member 72 extending in parallel below the upper plate member 71, and an upper portion. It has the coupling
  • the width of the upper plate member 71 in the short direction is approximately the same as the width of the lower plate member 72 in the short direction, and is smaller than the width of the coupling portion 73 in the short direction. Is also great.
  • the width in the short direction of the inner cylinder slit portion 63 of the inner cylinder 6 exceeds the width of the coupling portion 73 and is smaller than the width of the upper plate-like member 71.
  • the coupling portion 73 is fitted into the inner cylinder slit portion 63 and can slide, but the upper plate member 71 and the lower plate member 72 do not pass through the inner cylinder slit portion 63 unless they are forcibly deformed.
  • the upper plate member 71 is curved along the outer peripheral surface of the inner cylinder 6, the lower plate member 72 is curved along the outer peripheral surface of the filter insertion portion 42 of the inner needle base 4, and the coupling portion 73 is the stopper 9. It curves so that the outer peripheral surface of this may be followed.
  • a switch operation unit 74 for moving the switch 7 from the third position to the fourth position is provided at the top and tip of the upper plate member 71.
  • the front end side of the switch operation unit 74 is a surface slightly inclined upward toward the base end side so that the thumb or index finger of the hand holding the casing 5 can be easily pushed in the base end direction.
  • a pair of overhanging portions 75 and 75 are provided on both side surfaces of the upper plate-like member 71 adjacent to the proximal end side of the switch operating portion 74.
  • the overhang portions 75, 75 extend along the short direction of the upper plate-like member 71, respectively.
  • a press accommodating portion 76 that penetrates vertically and into which the protruding portion 45 of the inner needle base 4 is fitted is formed.
  • the tip side surface of the press accommodating portion 76 comes into contact with the protruding portion 45 of the inner needle base 4 and presses the protruding portion 45 downward, and the inner needle base 4 is swung later.
  • a pressing portion 76a that causes movement is configured.
  • the projecting portion 45 is provided with an inclined surface 45a for enabling pressing, but the present invention is not limited to this, and the pressing portion 76a is provided with an inclined surface for enabling pressing. Also good.
  • the peripheral edge portion of the press housing portion 76 constitutes a rocking prevention mechanism in cooperation with the rocking prevention portion 65 of the inner cylinder 6. That is, the peripheral edge portion and the rocking prevention portion 65 sandwich the filter insertion portion 42 of the inner needle base 4 from above and below until the inner cylinder 6 is moved from the first position to the second position. 4 is prevented from swinging downward.
  • FIG. 6 shows the details of the outer cylinder 8.
  • 6A is a plan view
  • FIG. 6B is a front view
  • FIG. 6C is a left side view
  • FIG. 6D is a right side view
  • FIG. 6E is a cross-sectional view taken along line EE in FIG. 6A, and FIG. is there.
  • the outer cylinder 8 includes a hollow cylindrical main body 81 in which a pair of anti-slip portions 81 a are formed on both side surfaces, and a disk-shaped flat plate provided at the base end of the main body 81. And a bottom portion 82 which is a member.
  • the outer cylinder 8 is formed with an outer cylinder slit portion 83 that is open in a slit shape from the tip to the center.
  • the distal end side of the outer cylinder slit portion 83 has a width equivalent to the lateral width of the inner cylinder operation portion 66 of the inner cylinder 6 and serves as an inner cylinder storage portion 83a for storing the inner cylinder operation portion 66 at the first position. .
  • the outer cylinder slit part 83 is provided with a pair of return prevention parts 83b adjacent to the proximal end side of the inner cylinder storage part 83a.
  • the pair of return preventing portions 83b are formed by projecting in a direction approaching from the opposing edges of the outer cylinder slit portion 83, respectively, and when the switch 7 moves from the third position to the fourth position, Further contact with the projecting portions 75 and 75 of the switch 7 prevents further movement.
  • the outer cylinder slit part 83 is adjacent to the proximal end side of the return prevention part 83b, and is formed with a switch housing part 83c that is narrower than the inner cylinder housing part 83a and houses the switch 7.
  • the bottom portion 82 has a disk shape whose center is opened in a rectangular shape, and locks the claw portion 93 a of the stopper 9.
  • the tip side surface is an inclined surface so that the claw portion 93a can easily get over, while the base side surface can prevent the claw portion 93a that got over from returning to the base.
  • the surface is perpendicular to the axis of the outer cylinder 8.
  • the assembly of the indwelling needle assembly 1 is performed as follows.
  • the above-described filter (aeration plug) 46 is inserted into the filter insertion portion 42 of the inner needle base 4.
  • one end of the compression spring S is attached to the inner needle fixing portion 41 of the inner needle base 4 so as to press the stepped portion 43 of the inner needle base 4.
  • a stopper 9 is attached to the inner needle base 4 from above. That is, the inner needle fixing portion 41 is fitted to the top plate portion 92 at the tip of the stopper 9, the top plate portion 92 presses the other end of the compression spring S, and the locked portion 44 of the inner needle base 4 is stopped by the stopper.
  • the stopper 9 is disposed with respect to the inner needle base 4 so as to be fitted into the latching storage portion 95 of 9. At this time, the locking portion 95 a of the locking storage portion 95 locks the locked portion 44 of the inner needle base 4 against the urging force of the compression spring S.
  • the distal end side of the inner needle base 4 is supported by the top plate portion 92 so that the proximal end side of the inner needle base 4 can swing downward.
  • the switch 7 is mounted on the stopper 9 from above. That is, the press accommodating portion 76 of the switch 7 is fitted into the protruding portion 45 of the inner needle base 4, and the lower plate member 72 of the switch 7 is fitted along the stopper slit portion 94 of the stopper 9.
  • the switch 7 is attached to the third position with respect to the stopper 9.
  • the distal end portion of the stopper 9 is inserted from the proximal end side of the inner tube 6, and the inner tube 6 is moved to the inner needle base 4, the stopper 9, and the stopper until the proximal end of the inner tube 6 contacts the bottom plate portion 93 of the stopper 9. Slide against switch 7.
  • the assembly groove 64 of the inner cylinder 6 includes the inclined portion 64a, the coupling portion 73 of the switch 7 and the convex portion 96 of the stopper 9 sequentially pass over the assembly groove 64 and are inserted into the inner cylinder slit portion 63.
  • the cylindrical portion 62 of the inner cylinder is inserted so as to be sandwiched between the upper plate member 71 and the lower plate member 72 of the switch 7.
  • the stopper 9 When the stopper 9 is advanced to the tip of the inner cylinder 6, the inner needle fixing portion 41 of the inner needle base 4 is inserted into the outer needle base mounting portion 61, and the swing prevention portion 65 of the inner cylinder 6 is The concave portion 92 c of the stopper 9 is fitted, and the lower portion of the filter insertion portion 42 of the inner needle base 4 is supported.
  • the switch operating portion 74 of the switch 7 enters and is stored in the arched lower portion of the inner cylinder operating portion 66 of the inner cylinder 6. Since the inner length of the inner cylinder 6 and the outer length of the stopper 9 are approximately the same, when the stopper 9 is advanced until it contacts the tip of the inner cylinder 6, the base end of the inner cylinder 6 is the bottom plate of the stopper 9. It contacts the part 93.
  • the inner cylinder 6 is attached to the stopper 9 at the first position, and the position of the inner cylinder operating portion 66 at the first position of the inner cylinder 6 and the switch at the third position of the switch 7 are set.
  • the position of the operation unit 74 is approximately the same in the longitudinal direction.
  • the swing preventing portion 65 of the inner cylinder 6 is supported by sandwiching the filter insertion portion 42 of the inner needle base 4 from above and below by the bottom surface of the second plate-like member of the switch 7 and the inner peripheral surface of the stopper 9.
  • the filter insertion portion 42 is prevented from swinging downward about the top plate portion 92.
  • the swing prevention portion 65 and the concave portion 92 c of the stopper 9 prevent the stopper 9 from rotating relative to the inside of the inner cylinder 6.
  • the base end portion of the inner cylinder 6 is inserted from the distal end side of the outer cylinder 8, and the outer cylinder 8 is moved to the inner needle base 4, the stopper 9, until the bottom plate portion 93 of the stopper 9 contacts the bottom portion 82 of the outer cylinder.
  • the switch 7 and the inner cylinder 6 are slid.
  • the upper plate member 71 of the switch 7 and the inner cylinder operating portion 66 of the inner cylinder 6 are guided by the outer cylinder slit portion 83 of the outer cylinder 8.
  • the switch 7 is inserted along the outer cylinder slit portion 83, the upper plate member 71 of the switch 7 is stored in the switch storage portion 83c, and the inner cylinder operation portion 66 is stored in the inner cylinder storage portion 83a.
  • the claw portion 93a of the stopper 9 gets over the opening provided in the bottom portion 82 of the outer cylinder 8 and is locked. The Thereby, the mounting of the outer cylinder 8 is completed, and the inner cylinder 6 is attached to the first position with respect to the outer cylinder 8.
  • an adhesive is applied to the proximal end portion of the inner needle 3, and the proximal end portion is inserted into the inner needle fixing portion 41 of the inner needle base 4 and adhered.
  • the indwelling part 2 is attached to the inner cylinder 6 by fitting the outer needle base attaching part 61 of the inner cylinder 6 to the outer needle base 22 of the indwelling part 2. Further, the protector 10 is attached to the outer cylinder 8 by inserting the distal end of the outer cylinder 8 into the base end of the protector 10. Thereby, the assembly of the indwelling needle assembly 1 is completed.
  • the protector 10 When using the indwelling needle assembly 1, first, the protector 10 is removed from the indwelling needle assembly 1 to expose the outer needle 21.
  • the housing 5 is held, and the inner needle 3 and the outer needle 21 are punctured into the target site of the blood vessel.
  • the puncture of the inner needle 3 and the outer needle 21 into the blood vessel can be confirmed by the occurrence of flashback of blood at the filter insertion portion 42 of the inner needle base 4.
  • the inner needle base 4 is configured such that the distal end side of the inner needle fixing portion 41 can be swung by the top plate portion 92 of the stopper 9 as shown in FIG. 7A. It is supported by the locking portion 95a of the stopper 9 via the locked portion 44 of the inner needle base 4 against the urging force of the compression spring S.
  • the swing preventing portion 65 of the inner cylinder 6 supports the lower portion of the filter insertion portion 42, the downward swing of the filter insertion portion 42 is prevented.
  • the switch operating portion 74 of the switch 7 is pulled with the thumb or index finger of the hand holding the housing 5.
  • the pressing portion 76a of the switch 7 comes into contact with the protruding portion 45 of the inner needle base 4, as shown in FIG.
  • the protrusion 45 is pressed down.
  • the inner needle base 4 swings around the top plate portion 92 of the stopper 9 and the filter insertion portion 42 of the inner needle base 4 is displaced downward.
  • the locked portion 44 of the inner needle base 4 is displaced downward to be removed from the position supported by the locking portion 95a of the stopper 9, and the support of the locked portion 44 by the locking portion 95a is released. Is done.
  • the outer needle 21 with the outer needle base 22 can be placed at the target site.
  • treatment such as infusion is performed.
  • the inner cylinder with the thumb or index finger of the hand holding the housing 5
  • the support of the inner needle base 4 against the compression spring S biasing member
  • the inner needle base 4 can be moved in the proximal direction by the compression spring S, and the inner needle 3 can be accommodated in the housing 5.
  • the prevention of the swinging of the inner needle base 4 is performed by an operation of pushing the inner cylinder operation portion 66 in the distal direction, and the support by the stopper 9 is released by swinging the inner needle base 4. Since the operation is divided so as to be performed by pulling the switch operation portion 74 in the proximal direction, it is possible to prevent the inner needle 3 from being retracted accidentally and the inner needle from being received at an unexpected timing. .
  • the position of the inner cylinder operation portion 66 at the first position of the inner cylinder 6 and the position of the switch operation portion 74 at the third position of the switch 7 are substantially the same in the longitudinal direction.
  • the operation of pushing the inner cylinder operation part 66 in the distal direction and the operation of pulling the switch operation part 74 in the proximal direction can be performed only by extending and bending the finger. Therefore, the operation of using a plurality of fingers or picking them up is not necessary during the procedure, and can be easily operated.
  • the coupling portion 73 of the switch 7 and the convex portion 96 of the stopper 9 are sandwiched between opposing edges of the inner cylinder slit portion 63 of the inner cylinder 6, and the upper plate member 71 of the switch 7 is Since the stopper 9, the inner cylinder 6 and the outer cylinder 8 are prevented from rotating relative to each other via the switch 7, the procedure is stably performed. Can do.
  • the switch 7 has a substantially tuning fork shape in which an upper plate member 71 and a lower plate member 72 are coupled by a coupling portion 73, and therefore the switch operation unit 74 is pulled in the proximal direction.
  • the switch operation unit 74 When operated, compression and tension work along the longitudinal direction of the upper plate member 71 and the lower plate member 72. Therefore, since the twist and the bending do not occur, the width can be designed to be narrow.
  • the lower plate member 72 is placed inside the cylindrical portion 62 of the inner cylinder 6 in a state where the pressing housing portion 76 of the switch 7 is fitted to the protruding portion 45 of the inner needle base 4. Can be assembled to enter. Therefore, according to this embodiment, the indwelling needle assembly 1 can be downsized with a simple configuration.
  • the inner cylinder operation portion 66 is formed in an arch shape by a pair of column portions 66a and 66a and a bridge portion 66b connecting both the column portions 66a, but the bridge portion 66b is omitted.
  • a pair of pillar portions 66a and 66a may be used, the bridge portion 66b and the pillar portion 66a may be omitted to form a single pillar portion 66a, and the pillar portion 66a may be omitted as an L-shaped inner cylinder operation portion 66. Also good.
  • the inner cylinder operation unit 66 is formed in an arch shape, and the switch operation unit 74 is disposed on the inner side thereof, so that the position of the inner cylinder operation unit 66 in the first position of the inner cylinder 6
  • the position of the switch operation unit 74 at the third position of the switch 7 is matched in the longitudinal direction, but the switch operation unit 74 at the third position is set to the position of the inner cylinder operation unit 66 at the first position of the inner cylinder 6.
  • a return prevention mechanism 67 that prevents the inner cylinder 6 from returning toward the first position is provided on the inner cylinder 6. You may provide in a base end part.
  • the return prevention mechanism 67 is formed by cutting from the inner cylinder slit portion 63 and protrudes into the inner cylinder slit portion 63 at the free ends of a pair of cantilevered portions extending in the longitudinal direction of the inner cylinder slit portion 63. Configured as a part. Thereby, the return prevention mechanism 67 is elastically pressed by the convex part 96 of the stopper 9 and can be returned when the inner cylinder 6 moves from the first position to the second position.
  • the tip end side of the inner cylinder 6 of the return prevention mechanism 67 is inclined so that the convex part 96 of the stopper 9 can easily get over. Further, the opposite side edges of the central portion of the return prevention mechanism 67 are notched into a U-shape corresponding to the convex portion 96 so that the convex portion 96 that has been overcome can be prevented from being fitted and returned to the base. ing.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Public Health (AREA)
  • Vascular Medicine (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
PCT/JP2018/013286 2017-03-30 2018-03-29 留置針組立体 WO2018181728A1 (ja)

Applications Claiming Priority (2)

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JP2017-069278 2017-03-30
JP2017069278A JP6864180B2 (ja) 2017-03-30 2017-03-30 留置針組立体

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WO2018181728A1 true WO2018181728A1 (ja) 2018-10-04

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Publication number Priority date Publication date Assignee Title
IT201900001685A1 (it) 2019-02-06 2020-08-06 Sol Millennium Swiss R&D Center Sa Dispositivo medico con cannula disassata

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6056726A (en) * 1994-02-28 2000-05-02 Isaacson; Dennis Ray Self-contained safety intravenous catheter insertion device
JP2004533278A (ja) * 2001-02-21 2004-11-04 セルポムド リミテッド 小型カテーテル挿入装置
US20090131872A1 (en) * 2004-12-28 2009-05-21 Sergey Popov Catheter placement device
JP2013022263A (ja) * 2011-07-21 2013-02-04 Top Corp 留置針組立体
JP2016506282A (ja) * 2013-01-11 2016-03-03 江蘇磐宇科技有限公司Ｓｕｎｗｅｌｌ Ｂｉｏｔｅｃｈ Ｃｏ．， Ｌｔｄ． 安全な静脈留置針

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011045543A (ja) * 2009-08-27 2011-03-10 Terumo Corp 留置針組立体
EP2489393A4 (en) * 2009-10-16 2013-04-03 Terumo Corp INVESTMENT NEEDLE AND INVESTMENT NEEDLE ASSEMBLY

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6056726A (en) * 1994-02-28 2000-05-02 Isaacson; Dennis Ray Self-contained safety intravenous catheter insertion device
JP2004533278A (ja) * 2001-02-21 2004-11-04 セルポムド リミテッド 小型カテーテル挿入装置
US20090131872A1 (en) * 2004-12-28 2009-05-21 Sergey Popov Catheter placement device
JP2013022263A (ja) * 2011-07-21 2013-02-04 Top Corp 留置針組立体
JP2016506282A (ja) * 2013-01-11 2016-03-03 江蘇磐宇科技有限公司Ｓｕｎｗｅｌｌ Ｂｉｏｔｅｃｈ Ｃｏ．， Ｌｔｄ． 安全な静脈留置針

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JP2018166992A (ja) 2018-11-01
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TWI735772B (zh) 2021-08-11

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