WO2001095958A1 - Puncturer and self-retaining needle assembly - Google Patents

Puncturer and self-retaining needle assembly Download PDF

Info

Publication number
WO2001095958A1
WO2001095958A1 PCT/JP2001/004942 JP0104942W WO0195958A1 WO 2001095958 A1 WO2001095958 A1 WO 2001095958A1 JP 0104942 W JP0104942 W JP 0104942W WO 0195958 A1 WO0195958 A1 WO 0195958A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
needle
portion
evening
inner
member
Prior art date
Application number
PCT/JP2001/004942
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiro Ishida
Original Assignee
Terumo Kabushiki Kaisha
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0618Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
    • A61M25/0625Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard with a permanent connection to the needle hub, e.g. a guiding rail, a locking mechanism or a guard advancement mechanism
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • A61M2005/325Means obstructing the needle passage at distal end of a needle protection sleeve
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3273Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel freely sliding on needle shaft without connection to syringe or needle

Abstract

A puncturer and self-retaining needle assembly adapted to reliably operate a shutter member and provide a high degree of safety in connection with waste disposal or the like. The self-retaining needle assembly (1) comprises a hub-equipped outer needle (4) composed of an outer needle (2), which is a self-retaining needle, and an outer needle hub (3), a hub-equipped inner needle (7) composed of an inner needle (5) used by being inserted in the outer needle (2) and an inner needle hub (6), a protector (8) covering the needle tip (51) of the inner needle (5), and a shutter member (85) installed in the protector (8). The shutter member (85) is integrally formed by bending a strip-like sheet member having elasticity. The shutter member (85) is received in a space (83) in a compressed state, which is a first position. When the needle tip (51) of the inner needle (5) passes through the space (83), the shutter member (85) is released from compression and assumes a second position under its own elastic force, in which position it prevents movement of the needle tip (51) toward the front end.

Description

Puncture tool and the indwelling 釙組 stereoscopic

TECHNICAL FIELD The present invention relates to a puncture device and indwelling Akirahari assembly. More specifically, for example, it relates to a puncture device and the indwelling needle assembly with which to be used to puncture a blood vessel during an infusion or blood collection.

book

The like when performing infusion to background art patient, an indwelling needle connected with an infusion line piercing the blood tract of a patient, do this by indwelling. Such an indwelling needle includes a hollow outer needle, an inner needle which an outer needle hub secured to the proximal end of the outer needle is inserted into the outer inner needle to have a sharp needle tip at the distal end, the inner needle It is composed of a anchored inner needle hub of the proximal end. When piercing the indwelling needle of the patient blood vessel, the inner needle is inserted into the outer needle, it performs puncturing operation in a state of projecting the inner needle 釙 away from the tip of the outer needle. When 釙先 of the inner needle has reached into the blood vessel, blood flows from the needle tip aperture, through the lumen of the inner needle, it flows into the transparent inner needle hub (flashback). Thus, it can be confirmed that the inner needle has ensured vessels. After verifying this flashback, slightly advance the inner needle and outer needle, inserting the tip of the outer needle into the blood vessel. Then, while gripping the outer needle by hand, vent up the inner 釙 from the outer needle, connecting the outer needle hub of the infusion line connector. Then, the administration of the infusion through the connected infusion line and the outer needle.

Incidentally, the inner needle withdrawn from the outer needle, to become unnecessary, but Ru is subjected to disposal, the which is directly discarded, accidents that to finger a finger or the like with the inner needle of the needle tip by mistake discarded and Others there is a possibility that may occur. In particular, the surface or inside of the inner needle, blood deposition, because of the remaining, by such Ayama剌, Ru possibility mower causing infection.

To solve this problem, USP 4 9 9 4 0 4 1 patent are relatively movable with respect Uchi釙Ha blanking, provided protector 釙先 that can be stored for at least the inner 釙indwelling needle has been proposed was. Such indwelling needle, an inner needle after taking vent from the outer needle, moving the Uchi釙 hub to protect evening proximal direction, is configured as to house the needle point of the inner needle in the protector evening there. More to be installed this protection evening, able to prevent the accident that prick a finger or the like in 釙先 the inner 釙 incorrectly disposal operator or the like. ',

In addition, such indwelling needles, when 釙先 is temporarily housed in protection in the evening, in contact with the 釙 destination, those with shutter means for blocking the passage of the needle point of the tip side is proposed ing.

Such shirt evening a means includes a shutter member, and a panel member for urging the shutter member.

However, in such indwelling needle, prior to actuation of the shutter means, i.e., before use of the indwelling needle, panel member is a compressed state, is stored in this state. Therefore, if you have long-term storage of the indwelling needle, it marked with favorite phrase bends panel member, after the use of distillation 置針, upon disposal, is the shutter unit is not working well. In the case of this, there is a risk that the needle tip pops out from the tip of the protection evening. Disclosure of the Invention

An object of the present invention, a shirt evening reliably actuated first member is to provide a high puncture tool and the indwelling needle assembly safe upon disposal processing, or the like.

These objects are achieved by the present invention is directed to (2 7).

(1) A puncture device comprising: a needle body having a needle tip at the distal end, a hub provided at the proximal end of the needle body, the protector evening and the front cover Kihari destination,

The protector includes a protector evening the body having 揷通 capable 釙体 passage the 釙体,

Wherein 釙体 having a second orientation and can be displaced in a shutter member to deter the passage of the needle tip of the 釙体 passage to the first posture capable 揷通 釙体,

The shutter member includes a first portion, said first and a second site present via the connection portion to the site of, the opposite end portions and the connecting portion of the first region, puncture device the distance between the opposite end portions and said connecting portion of the second portion, characterized in that it is configured to change between the first posture and the second posture.

(2) the shutter member, by at least a portion of said first region and Z or the second site is 弹性 deformed, puncture device of the said distance is configured to change (1) .

(3) wherein at least one of the first portion or said second site, the piercing device of having a protrusion protruding toward the other (1) or (2).

(4) the protrusion puncture device of the first site and Z or the was second portion bending or the are those formed by bending (3).

(5) the shutter member is disposed on the needle body middle which is formed in the space of the passage, said second portion, when the first position, an end portion opposite to the connecting portion puncture device according to any one of contact with that (1) is not in the outer peripheral surface of said needle body (4).

(6) said first portion and said second portion, when the second position, the end portion of the front Symbol connecting portion opposite, cormorants O respectively, abut against the inner surface of the protector evening body It is configured (1) to puncture device according to any one of (5).

(7) the end opposite to the connecting portion of the first portion, said opposite end and near the connection portion between the consolidated portion of the second part, when said second position , are respectively the puncture device according to any one of in which (1) is configured to abut against the inner surface of the protector evening body (5).

(8) the first site, the end opposite to the connecting portion, 穿剌 of having a contact area increasing means for increasing the contact area between the inner surface of the protector evening body (6) or (7) ingredients.

(9) the contact area increasing means, the piercing device of the said connecting portion of the first part the ends of the opposite side, a bent portion formed by bending (8).

(10) the first site is a puncture device according to any one of the end opposite to the connecting portion is (is 1) is fixed to the protector evening body (5).

(11) the second site, the end opposite to the connection portion, to any one of (1) having a friction reducing means for reducing the frictional resistance between the outer peripheral surface of said needle body (10) puncture instrument described.

(12) said friction reducing means, wherein an end portion opposite to the connecting portion of the second part, formed by a chamfer which is more formed to bent portions or chamfered formed by folding puncture tool of there (11).

(13) the connecting portion, the puncture device according to any one of in which (1) consists of a bent portion which is bent in a V-shape (12).

(1) the connecting portion is constituted by a curved portion which is curved, puncture device according to any one of a radius of curvature (average) of 1. is 0mm or less (1) to (12).

(15) the shutter member is constituted by a band-shaped plate member, the puncture device according to any one of the 0.04 to 0. A 2 mm (1) without its thickness (14).

(16) the shutter member, the puncture instrument according to any one of the lubricant is applied (1) of stone (15) on its surface.

(17) in a state where the protection evening has covered the needle tip of the needle body, to the protection evening is (1) not having a detachment preventing means for preventing the detached from the 釙先 of the 釙体 (16) puncture device according to any one of.

(18) the detachment preventing means includes a first engagement portion formed in the needle body, the flop Roteku formed in evening, a second engaging portion engageable with the first engagement portion puncture device of that consists (17) between.

(19) said first engagement portion includes a recess formed in an outer peripheral portion of the needle body, said second engaging portion is composed of a convex portion engageable in the recess ( puncture tool of 18). (2 'flight) said needle body has different cross-sectional shape of said needle point and around it from the base end portion, the first engagement portion, the portion cross-sectional shape of the needle body is changed in the configuration, the second engaging portion, a puncture tool configured (18) at the step portion transverse new surface shape of the needle body may engage a portion changes.

(21) the detachment preventing means, the piercing device of composed (17) wherein a was linear or connecting the protector and Hachibu a connecting member having a strip.

(22) when said protection the evening is brought close to the hub, the puncture instrument having a housing space for housing the consolidated member in a relaxed state (21).

(23) the housing space is formed in the hub puncture tool (22). (24) the connecting member, the end portion of the hub side is not fixed to the hub, the end portion of the hub side of the connecting member is engaged with the said Hachibu, the connecting member is the puncture Togegu engaging portion is provided to prevent the coming off-eight blanking (22) or (23).

(25) said needle body is an inner needle of the tubular, the hub is the inner needle hub (1) to puncture device according to any one of (24).

And the piercing device (26) (25),

Hollow and outer needle of the inner needle can be inserted,

Indwelling needle assembly and having an outer needle hub disposed at the proximal end of the outer needle.

(27) the protection evening and the outer indwelling needle assembly of 釙 Hachibu and is engageable (26). BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a longitudinal sectional view showing a first embodiment of the application of the puncture device of the present invention to the indwelling needle assembly (first posture of the shutter opening and first member).

Figure 2 is a longitudinal 靳面 diagram showing a first embodiment of the application of the puncture device of the present invention to the indwelling needle assembly (second posture shirt evening first member).

Figure 3 is a longitudinal sectional view showing the construction of the distal side of the protector (first position of the shutter member) provided in the indwelling needle assembly of the first embodiment.

Figure 4 is a longitudinal sectional view showing a protection evening distal side configuration indwelling 釙組 solid comprises the first embodiment (second posture shirt evening first member).

Figure 5 is a longitudinal sectional view showing a protection evening distal side configuration included in the indwelling needle assembly of the second embodiment (first position of the shutter member).

Figure 6 is a longitudinal sectional view showing a protection evening distal side configuration included in the indwelling needle assembly of the second embodiment (second posture shirt evening first member).

Figure 7 is a longitudinal sectional view showing a protection evening distal side configuration included in the indwelling needle assembly of the third embodiment (the first position of the shutter member).

Figure 8 is a longitudinal sectional view showing the construction of the distal side of the protector (second position of the shutter member) provided in the indwelling needle assembly of the third embodiment.

Figure 9 is a longitudinal sectional view der ¾ showing a protection evening distal side configuration included in the indwelling needle assembly of the fourth embodiment (first position of the shutter member).

Figure 1 0 is a longitudinal sectional view showing a protection evening on the front end side of the structure of the indwelling needle assembly of the fourth embodiment is provided (the second position of the shutter member).

Figure 1 1 is a longitudinal sectional view showing a configuration of a protection evening distal side indwelling needle assembly is provided with the fifth embodiment (first orientation shirt evening first member).

Figure 1 2 is a longitudinal sectional view showing a configuration of a protection evening the distal indwelling 釙組 solid comprises a fifth embodiment (the second position of the shutter member).

Figure 1 3 is an enlarged vertical sectional view showing the configuration of the vicinity protection evening central unit included in the indwelling needle assembly of the sixth embodiment.

1 4 is an enlarged longitudinal sectional view showing a configuration of an end portion of the second portion of the shutter evening one member indwelling needle assembly of the seventh embodiment is provided.

Figure 1 5 is an enlarged longitudinal sectional view showing a configuration of an end portion of the second portion of the shutter member provided in the indwelling 釙組 stereoscopic eighth embodiment.

Figure 1 6 is a longitudinal sectional view showing a configuration of a protection evening distal side indwelling needle assembly is provided in the ninth embodiment (the first posture shirt evening first member).

Figure 1 7 is a longitudinal sectional view showing the indwelling needle assembly of the first 0 embodiment (first position of the shutter member).

Figure 1 8 is a longitudinal sectional view showing an indwelling 釙組 stereoscopic the first 0 embodiment (second position of the shutter member).

Figure 1 9 is a longitudinal sectional view showing the indwelling needle assembly of the first embodiment (first posture of the shutter member).

2 0 is a longitudinal sectional view showing the indwelling needle assembly of the first embodiment (second position shutting evening first member). BEST MODE FOR CARRYING OUT THE INVENTION '

Will be described in detail with reference to the puncture device and the preferred embodiment showing the indwelling 釙組 stereoscopic the accompanying drawings of the present invention.

Ku the first embodiment>

1 and 2, respectively, longitudinal sectional view showing a first embodiment of the application of the puncture device of the present invention to the indwelling needle assembly, 3 and 4, respectively, the indwelling needle of the first embodiment is a longitudinal sectional view showing a protection of evening of the distal configuration of the assembly is provided. In the following description, the right to "proximal end" in FIGS. 1-4, refers to the left side as "distal end". Indwelling needle assembly (puncture 釙組 solid) 1 shown in FIG. 1, since also comprises an outer needle and inner needle, in particular, constitutes a indwelling needle assembly for an infusion, the outer needle is cut 置釙2, the outer needle hub 3 and the hub with outer needle 4 constituted by provided at the proximal end portion of the outer needle 2, an inner needle (釙体) 5 which is used by being inserted into the outer 釙 2, a hub with a 釙 7 constituted by the inner needle hub 6 provided at the proximal end portion of the inner needle 5, and a protection evening 8 covering the needle tip 5 1 of the inner needle 5. Among them, in the inside with hub needle 7 and protection evening 8 constitute a piercing device of the present invention. The following describes the structure of each part.

Outer needle 2, a hollow shape, Ru is preferably used a material having a certain degree of flexibility. The constituent material of the outer needle 2 is not particularly limited, for example, Echirenteto rough Ruo Russia ethylene copolymer (ETFE), polyurethane, various soft resins such as polyether Nai port down resin.

Such outer needle 2, in whole or in part may have an internal visibility. Further, the material constituting the outer needle 2, for example, barium sulfate, blended with X-ray contrast agents such as barium carbonate, may also be provided with a contrast function.

Tip of the outer needle 2, in order to puncture the living body easily and minimally invasive, and has a tapered outer diameter gradually decreases along the distal direction. The proximal portion of the outer needle 2, the outer needle hub 3 is fixed liquid-tightly, and the internal lumen and an outer needle hub 3 of the outer needle 2 is communicated. Outer needle hub 3 is substantially cylindrical member, has a tapered shape gradually increasing its outer diameter and the inner diameter toward the proximal direction. The tapered portion component mates with the distal end portion of the protection evening 8 to be described later.

The outer needle Hachibu 3 is preferably made of a transparent (colorless transparent) colored transparent or translucent tree fat, internal visibility is ensured.

Outer needle 2, to the outer needle Hachibu 3, for example, force caulking, fusing (heat fusion, high frequency fusion bonded, etc.), by a method such as bonding with an adhesive, are fixed.

The inner needle 5 is hollow needle, for example, stainless steel, aluminum or aluminum Niumu alloy, is composed of a metallic material such as titanium or titanium alloy. The distal end of the needle 5, and sharp 釙先 5 1 is formed. The tip 5 1 shape is not particularly limited, in this embodiment, has a shape that having a predetermined angle inclined blade surface relative to the axis of the inner 釙 5.

The inner needle 5 is 揷入 in the lumen of the outer 釙 2, further state that the protection evening 8 fitted to the outer needle hub 3 together, that is used in a state shown in FIG. The following refers to this state as "assembled state".

The length of the inner 釙 5, when the assembled state, is the length of the extent in which at least the needle point 5 1 protrudes from the previous end opening 2 1 of the outer needle 2.

Proximal end of the inner 釙 5 is fixed to the tip of the inner needle hub 6, the lumen of the inner needle 5 is communicated with the internal space of the Uchihariha Bed 6. Inner 釙 Hachibu 6 is composed of a substantially cylindrical hollow member.

Method for fixing the inner needle hub 6 of the inner needle 5 is, for example, fitting, force caulking, fusing, a method such as bonding with an adhesive, or a method can be mentioned that a combination of these.

The inner needle Hachibu 6 is preferably transparent (colorless transparent), is composed of a colored transparent or translucent tree fat, internal visibility is ensured. Thus, when the needle tip 5 1 secured vessels, it is possible to confirm flashback of the blood flowing through the inner needle 5 by visual inspection.

The outer periphery of the tip end of the Uchi釙 hub 6, the flange 61 is formed. For example, when the operation of extracting the inner 釙 5 from the outer needle 2, the row Ukoto this operation by hooking a finger on the flange 61, it is possible to perform this operation more reliably.

In addition, the opening of the base end side of the inner needle hub 6, so as to cover the opening, the vent fill evening 6 2 is installed. The ventilation filter 6 2, gas is transmitted through the liquid has a property you cut off.

Specific examples of the ventilation filter 6 2, for example, various sintered porous body, a hydrophobic nonwoven fabric, other porous material and the like. In this case, as the sintered porous body, for example a polymeric material such as polyethylene (powder), a hydrophilic (water-soluble, 7 swellable) is preferably obtained by sintering a material containing polymer scratch. Using this sintered porous body, since the ventilation also cut off by contact with the liquid (blood), it is a child prevents the entry of air from outside.

In addition, the front end surface of the inner needle hub 6, the recess 6 3 are formed. The recess 6 3 has a distal end surface of the inner needle hub 6, when the proximal end surface of the protection evening 8 abuts the locking member 9 2 has a function as a relief hole being 揷入.

Outer needle hub 3, the constituent material of the protection evening body 81 to the inner needle hub 6 and later are not limited to Japanese, respectively, for example, polyethylene, polypropylene, Poributaji E emissions, ethylene - polyolefin and vinyl acetate copolymer , polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, Po esters, acrylic resin, ABS resin, AS resin, ionomer one, Poria acetal, Porifue two sulfide, various resin materials such as polyether ether ketone and the like.

Protection evening 8 includes a protector body 81 composed of a substantially cylindrical member, and a shutter member (shirt evening One means) 8 5 you later. The protection evening center of the main body 8 1, the needle body passageway 82 to the inner 釙 5 is 揷通 is formed to penetrate from the proximal end of the Purotekuda body 81 to the tip.

Cross-sectional shape of the needle body passageway 82 is circular and the inner diameter of the needle body passageway 82 is set to a slightly large value outside diameter and equal to or than that of the inner needle 5.

Further, the inside of the protector evening body 81, i.e. in the middle of the needle body passageway 82, the space 8 3 was enlarged needle body through passage 82 is formed. The space 8 3, the shutter member 8 5 it later is housed. Space 8 3, cylindrical, prismatic shape, or may be a different shape, but rectangular parallelepiped is preferred. Space 8 3 Shirt evening can accommodate an element 8 5 at the first position, and sized to sufficiently recover the second position.

The tip end of the protector evening body 81 has a shape capable of fitting the outer needle hub 3. For example, the outer diameter is tapered to gradually decrease toward the tip. Further, the base end side of the protection evening body 81 is exposed from the outer needle hub 3. The Exposed portions 8 la has a substantially cylindrical shape, that have a length that can be manually grasped. By having an exposed portion 8 1 a, space needlepoint 5 1 Uchi釙 5 withdrawn from the outer needle can be sufficiently accommodated in the protection evening can be ensured.

Protection evening proximal end of the main body 8 1 can the tip of Uchi釙 hub 6, they become configured to abut, thereby moving the inner needle hub 6 in the proximal direction relative to the protector evening 8. At the center portion in the longitudinal direction of the protector evening body 81, the fitting portion 8 4 protruding in a ring shape to be fitted to the base end edge portion of the outer needle Hachibu 3 is formed. The fitting portion 8 4, for example, when the outer needle hub 3 of the operation of removing the protection evening 8, by hooking a finger can be used to perform the operation.

In the illustrated configuration, protector evening body 81 has been integrally formed, not limited to this, for example, as in the sixth embodiment described below, obtained by fixing the two members - even good. In this case, in a separated state protection evening body 81 into two members, it is possible that internal (space 8 3 in) to house the shutter member 8 5 (installed). Shirt evening first member 8 5 has a function to prevent the needle tip 5 1 of the inner needle 5 located on the proximal side of the space 8 3 passes toward-edge direction.

Shirt evening first member 8 5 includes a first portion 8 6, the bent portion (connecting portion) 8 8 exists via a second 'second site that is bent to the site 8 6 of the first in a substantially V-shape and a 8 7, (elastically deformed) having elasticity by bending a band-like plate members are integrally formed.

The shut evening first member 8 5, the first portion 8 6 the angle between the second portion 8 7 changes, that is, near the proximal end 8 6 1 of the first portion 8 6 (the bent part 8 8 and the opposite end), by the distance between the near proximal end 8 7 1 of the second portion 8 7 (end of the bent portion 8 8 opposite) changes, the inner needle 5 釙体second position a passage 8 2 you blocking the 揷通 (through) can first posture (shown in FIGS. 1 and 3), the passage of the needle tip 5 1 of the inner needle 5 (FIGS. 2 and 4 to deformation and orientation) showing that (displacement).

That is, when the inner 釙 5 are 揷通 (through) the needle body passageway 82, shirt evening some member 8 5, the first portion 8 6 around the bending portion 8 8 second portion 8 7 and is accommodated (disposed) in the space 8 within 3 closer memorial compressed to (bent) state with each other, and has a first position (position shown in FIGS. 1 and 3). In this state, near the proximal end 8 6 1 of the first portion 8 6 (end of the bent portion 8 8 opposite side), those in the space 8 3 of the upper (near the inner surface of the protector evening body 8 1) contact, (the end opposite the bent portion 8 8) the second portion 8 7 the proximal 8 7 1 around is in contact with the vicinity of the outer peripheral surface of the inner needle 5.

On the other hand, when the Uchi釙 hub 6 to protect the evening 8 is moved in the proximal direction, the needle tip 5 1 of the inner needle 5 is moved in the proximal direction, through the space 8 3. At this time, the shutter member 8 5, the compressed state is released, by its own elastic force, a first portion 8 6 and the second portion position 8 7 spreads away from each other about the bending portion 8 8, with the proximal end 8 6 1. near the one quality maintain contact with the space 8 3 of the upper (protection evening body 8 1 of the inner surface), the proximal end 8 7 around 1, the bottom of the space 8 3 (protection evening body 8 1 of the inner surface) in contact, a second position (position shown in FIGS. 2 and 4). In this state, shirt evening first member 8 5, prevent the movement of the 釙先 5 1 tip direction (pass).

Incidentally, (in FIGS. 1 to 4, the length in the direction perpendicular to the paper surface) width of the shutter member 8 5 is set larger than the inner diameter of the needle body passageway 82. Therefore, if, even when a force in the distal direction to the proximal end of the inner 釙 hub 6 has been applied, the inner needle 5 is further from the state 釙先 5 1 is in contact with the proximal end face of the shutter member 8 5 tip It is prevented from moving in the direction. That is, the inner 釙 5, in a state where the needle tip 5 1 is in contact with the proximal end face of the shirt evening first member 8 5, even it'll move to the shutter member 8 5 each distal direction, shirt evening - member 8 5 needles since no entering the passage 8 within 2, more, it is moved to-edge direction is prevented (prevention).

Such arrangement shutter member 8 5 of the first orientation or al a compressed state, is excellent in restoring force to the second position is substantially original shape. Therefore, since the shirt evening bend to one member 8 5 favorite phrase that are attached is prevented, even when stored for a long period of indwelling needle assembly 1, the shutter member 8 5 becomes reliably second posture, the needle tip 5 1 prevent movement in the distal direction (anti) Ru can exhibit a sufficient effect to.

The thickness of the shirt evening first member 8 5 is not particularly limited, for example, 0.0 4-0. Is preferably about 2 mm, 0.0 8 to 0. More preferably about 1 mm . When shirt evening first member 8 5 is less than the lower limit of the, in the second position, depending on the magnitude of the force the inner needle hub 6 is subjected in the distal direction to the proximal end, the inner needle 5 toward the distal end move, Ru if there where 釙先 5 1 will break through the shirt evening first member 8 5. On the other hand, when the shirt evening first member 8 5 is thicker than the upper limit of the shutter member 8 5, depending on its constituent material, when in the first orientation, if the frictional resistance between the outer peripheral surface of the inner needle 5 is increased there is.

The material of the shutter member 8 5, der what may prevent the passage of 釙先 5 1 lever, it may be any, for example, polyethylene, polypropylene, polybutylene evening Zhen, polyolefin and ethylene one vinyl acetate copolymer , polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polymethyl force one Poneto, polyamide, polyethylene terephthalate, polyesters such as polybutylene terephthalate evening rate, acrylic resins, AB S resin, AS resin, Aiono Ma mono-, polyacetal evening Ichiru, Porifue two sulfide, various kinds of resin materials of polyether ether Ke tons etc., stainless steel, aluminum alloy, copper or copper-based alloys, various metallic materials such as titanium or titanium alloy.

The surface of such a shutter opening and first member 8 5, preferably lubricant is imparted. Thus, movement of the inner friction resistance between the outer peripheral surface and near the proximal end 8 7 1 of the second portion 8 7 of the needle 5 (sliding resistance) is reduced, the inner needle 5 protection evening 8 the proximal direction be performed more circle, to smooth it can be. Jun, as the lubricant, for example, silicone, silicone N'oiru, grease, various oils, surfactants and the like.

In the present embodiment, the proximal end 8 6 near 1 of the first portion 8 6 is merely a configuration that abuts against the inner surface of the protector body 81. The invention is not limited thereto, the protector body 81, for example, implanted, fusion, and more methods such as bonding with an adhesive, but may be fixed, it is not fixed from the first position excellent restoring force to the second position, also the assembling process is simple preferred.

Such indwelling needle assembly 1, the protector 8 housing the needle tip 5 1 of the inner needle 5 in (covered) state, prevent the disengagement from the needle tip 5 1 of the inner 釙 5 protection evening 8 It is that the detachment preventing means (9 a, 9 b, 9 c) may have further a. The following describes the structure of the detachment preventing means 9 a.

The outer peripheral surface of the position of a predetermined length from the distal end of the inner needle 5, the recess (first engagement portion) 9 1 are formed.

On the other hand, the proximal end of the protector evening 8 (the protector body 81), elastically deformable locking member (plate panel) 9 2 are projectingly formed. The locking member 9 2 may be formed by protection evening the same member is secured to protect the evening as a separate member, implanted, fusion, may be bonded. The locking member 9 2 fixed end and the tip, and the proximal end and the movable end is cantilevered protection evening body 81, Boboshide straight direction movable end within 弹性 to the inner needle 5 ( in Figures 1 and 2, it is displaced (deformed) in the vertical direction). This is the locking member 9 2 of the base end (movable end), as a second engagement portion, the claw (convex portion) projecting toward the inner needle 5 9 3 are gar body formed. Accordingly, the pawl 9 3 (in FIG. 1 and FIG. 2, the vertical direction) inner 釙 5 Nibobo vertical direction can be moved.

In the assembled condition of the indwelling 釙組 assembly 1, the pawl 9 3, more elastic force of the locking member 9 2, is in contact with the outer peripheral surface of the inner needle 5 (see FIG. 1). Moreover, protection evening 8 (pro Tech evening body 8 1) for housing the needle tip 5 1 of the inner needle 5 and (covered), the pawl 9 3 is inserted into the recess 9 1 formed in the inner needle 5, the recess 9 1 to engage (see Fig. 2). This ensures that the protector evening 8 deviates from the needle tip 5 1 of the inner needle 5 (leaves) of is prevented. In such a recess 9 1 and the pawl 9 3, it constitutes detachment preventing means 9 a.

The recess 9 1 may be made plurality shaped along the longitudinal and / or circumferential direction of the inner needle 5.

In the illustrated configuration, the recess 9 1 is that is formed on a part of the outer circumferential direction of the inner needle 5 is not limited thereto, it is formed annularly along the entire circumference of the outer peripheral surface of the inner needle 5 and rather it may also, also, as possible out be comprised of a groove formed along a longitudinal direction of the outer peripheral surface of the inner needle 5.

Next, an example of how to use the indwelling 釙組 assembly 1 will be described in detail.

[1] a state assembled indwelling 釙組 assembly 1, while manually grasped the inner needle Hachibu 6, etc., the inner needle 5 and the outer needle 2 to puncture the blood vessel (vein or artery) of a patient.

When the needle tip 5 1 [2] the needle 5 is punctured into the blood vessel, the internal pressure of the vessel (blood pressure) flows back inner 釙 5 proximally blood is introduced into the inner needle hub 6, the viewing it is possible to visually recognize the flashback through the Uchi釙 hub 6 having sex. Thus the needle tip 5 1 of the inner needle 5 can know that it has secured the vessel.

In line with the inflow of the blood, the air of the inner needle hub 6 is to be discharged through the vent fill evening 6 2, blood can not pass through the gas permeable filter 6 2, leakage to the outside occurs Absent.

[3] further advancing the inner 釙 5 and the outer needle 2 to the minute distance distally, the distal end opening 2 1 out 釙 2 is inserted into the blood vessel. Thus, the outer 釙 2 to secure the vessel.

[4] while pressing by hand the outer needle 2, which is placed in a blood vessel, holding the inner needle hub 6 with the other hand, pulling the proximal direction. Thus, Ru inner 釙 5 withdrawn from the outer needle 2. At this time, protector evening 8, a state fitted into the outer needle hub 3 is maintained.

The [5] the step [4], the inner needle 5, the is moved from the position of the assembled proximal direction, passing 釙先 5 1 of the inner 釙 5 inside the space 8 3 of the protector 8 until , the shutter member 8 5 maintains the first position, near the proximal end 8 7 1 of the second portion 8 7 comes into contact with the outer peripheral surface of the inner needle 5 (see FIGS. 1 and 3).

[6] Further inner 釙 5 is moved in the proximal direction, the needle tip 5 1 pass through the space 8 3, the shutter member 8 5 'due to its own elastic force, a first portion 8 6 No. and 2 parts position 8 7 moves so away from each other around the bending portion 8 8. That, shirts evening first member 8 5 opens in the space 8 3 (spread). At this time, the proximal end 8 6 near 1 of the first portion 8 6 comes into contact with the upper space 8 3, the proximal end 8 7 near with one second portion 8 7, against the bottom of the space 8 3 contact. Thus, shirt evening first member 8 5 becomes the second attitude (see FIG. 2 and FIG. 4).

Thus, the shutter member 8 5 is the second position, even if the needle tip 5 1 you'll move again back in the distal direction, the needle tip 5 1 abuts against the shutter member 8 5 can not return .

[7] passes through the needle tip 5 1 space 8 3, When Shirt evening first member 8 5 becomes a second orientation, substantially at the same time as this, formed on the inner needle 5 is claw 9 3 of the locking member 9 2 It is inserted into the recess 9 1 which is to lock (see FIGS. 2 and 4).

Thus, after covering the protection evening 8 needle tip 5 1, pro Tech 8 is disengaged from the needle tip 5 1 of the inner needle 5 (outside) that is prevented.

[8] needlepoint 5 1 of the inner 釙 5 in this way Once covered with protection evening 8, removing the protector evening 8 fitted in the outer needle hub 3 from the outer needle hub 3. Thus, needle tip 5 1 a hub with the needle 7 is covered with the protector 8, the hub with outer needle 4 are separated.

The outer needle hub 3 of [9] in 釙 5 out with hub withdrawn needle 4, connectors, etc. of the infusion set (not shown) to quickly connect, according to a conventional method to start the administration of the infusion.

After One sampling inner 釙 5 from the outer 釙 2 in this manner, since the hub with the 釙 7 is not required, it is subjected to waste disposal. The hub with 釙 7 is needle tip 5 1 is covered by the protector 8, in particular, the needle tip 5 1 shirt evening moves than beyond the first member 8 5 distally, the distal end of the protector evening 8 and protrude from, that the needle tip 5 1 is moved in the proximal direction, since there is no possible protection evening 8 deviates, prick a finger or the like, such as those who do disposal by mistake by the needlepoint 5 1 accident can be prevented. Furthermore, in such indwelling needle assembly 1, fitted strength between the protection evening 8 and the outer 釙 hub 3 (bonding force), by setting smaller than the engaging force between the recesses 9 1 and the pawl 9 3, following occurs, such action 'effect as of. That is, the state of the step [7], when pulling the inner needle 5 in the proximal direction, protector evening 8 together with the inner needle 5 is also pulled proximally, protection was fitted into the outer needle hub 3 evening 8 Ru can be pulled out from the outer needle hub 3.

In this manner, the inner needle 5 with the operation of pulling the outer needle 2 is disengaged the, protection evening 8 from the outer needle hubs 3, it is possible to perform the operation for covering the needle tip 5 1 of the inner needle 5, it can be carried out the operation more easily.

<Second Embodiment>

Next, a description of a second embodiment of the indwelling needle assembly of the present invention.

5 and 6, respectively, a longitudinal sectional view showing the protection of evening of the distal configuration of the indwelling 釙組 solid comprises the second embodiment. Hereinafter abbreviated For indwelling needle assembly 1 shown in FIGS. 5 and 6, the first focuses on the differences from the embodiments, the same matters information, description thereof.

In the indwelling needle assembly 1 of the second embodiment, except for the configuration of the shut evening first member 8 5 are different, which is the same as the first embodiment.

That is, the first portion 8 6, the protruding portion 8 6 2 are formed to protrude toward the second portion 8 7 (other) in the middle. The projecting portion 8 6 2 are those which are formed by bending the first portion 8 6.

By providing such a protrusion 8 6 2, shirt evening first member 8 5, in the first position (position shown in FIG. 5), the state of being compressed more strongly. Thus, the shutter member 8 5, restore to the second position (position shown in FIG. 6) is more reliably Na of.

Such a projecting portion 8 6 2 may be provided on one even without least the first portion 8 6 or the second portion 8 7, the other shape is not particularly limited. Further, the projecting portions 8 6 2 may be more formed to bend the first portion 8 6 and second portion 8 7.

<Third Embodiment>

Next, a description will be given of a third embodiment of the indwelling needle assembly of the present invention.

7 and 8, respectively, a longitudinal sectional view showing the protection of evening of the distal configuration provided indwelling needle assembly of the third embodiment. Hereinafter abbreviated For indwelling needle assembly 1 shown in FIGS. 7 and 8, the first focuses on the differences from the embodiments, the same matters information, description thereof.

In the indwelling needle assembly 1 of the third embodiment, except for the configuration of the shut evening first member 8 5 are different, which is the same as the first embodiment.

That is, the first portion 8 6, the protruding portion 8 6 2 are formed to protrude toward the second portion 8 7 on its way. The projecting portion 8 6 2 are those which are formed by bending the first portion 8 6.

The inner needle 5 is while 揷通 (through) the needle body passageway 82, the shutter member 8 5, near the proximal end 8 6 1 and around the bent portion 8 8 of the first part 8 6 spaces 8 3 the top surface (inner surface of pro Tech evening body 8 1), also, the outer circumferential surface of the second portion 8 7 the proximal 8 7 1 near the inner 釙 5, respectively, abut, the curvature of the projection portion 8 6 2 radius There is increasing accommodated in the space 8 within 3 (first portion 8 6 approaches a flat plate) of such a condition (installed), and has a first position (the state shown in FIG. 7).

On the other hand, when the inner needle hub 6 to protect the evening 8 is moved in the proximal direction, the needle tip 5 1 of the inner needle 5 is moved in the proximal direction, through the space 8 3. In this case, near the first portion 8 6 of the proximal end 8 6 1 and around the bent portion 8 8, respectively, while maintaining contact with the space 8 third upper (inner surface of the protector body 81), the first portion 8 6 returns to substantially its original shape as the curvature radius decreases due to its own elastic force. Thus, second portion 8 7 is rotated around the bending portion 8 8 contacts near its proximal end 8 7 1 to the bottom of the space 8 3 (the inner surface of the protector body 81), shutter one member 8 5 becomes the second attitude (attitude shown in FIG. 8). In this state, the shutter member 8 5, prevent the movement of the tip 5 1-edge direction (pass).

With such a configuration, shirt evening first member 8 5, it is reliably Ri good restoration to the second position.

Ingredients Fourth Embodiment>

Next, a description of a fourth embodiment of the indwelling needle assembly of the present invention.

9 and 1 0 are, respectively, a longitudinal sectional view showing the construction of the distal side of Purode Kuta indwelling needle assembly is provided with a fourth embodiment. Hereinafter, the indwelling. Needle assembly 1 shown in FIGS. 9 and 1 0, for the differences from the first and third embodiments will be mainly described, similar matters will be omitted.

In the indwelling needle assembly 1 of the fourth embodiment, except Rukoto have different configuration of the shutter member 8 5 is the same as the first embodiment.

That is, the shutter member 8 5, when the first position (position shown in FIG. 9), with the collision detection section 8 6 2 is folded into an S-shape, is housed (installed) in space 8 3 there.

The shirt evening first member 8 5 moves needlepoint 5 1 of the inner needle 5 is the proximal direction, it passes through the space 8 3, protrusions 8 which have been folded in S-shape of the first portion 8 6 6 2 returns to substantially its original shape by 弹性 force of its own al, a second position (position shown in FIG. 1, 0).

In such a configuration, the shutter member 8 5, since a projecting portion 8 6 2 which is folded in an S-shape, regardless of the modulus of elasticity of the material itself, a strong elasticity is obtained, the second restore to posture is made more reliably.

Ku fifth embodiment>

Next, a description of a fifth embodiment of the indwelling 釙組 solid of the present invention.

Figure 1 1 and Figure 1 2 is, respectively, a longitudinal sectional view showing a pro Tech the evening of the distal configuration provided indwelling needle assembly of the fifth embodiment. DETAILED DESCRIPTION FIG. 1 1 and 1 2 I indwelling 釙組 assembly 1 shown this, for the differences from the first and third embodiments will be mainly described, similar matters will be omitted.

In the indwelling 釙組 assembly 1 of the fifth embodiment, except Rukoto have different configuration of the shutter member 8 5 is the same as the first embodiment.

That is, the shutter member 8 5, when the first position (position shown in FIG. 1 1), the base end side of the second portion 8 7 is curved, in contact with the outer peripheral surface of the inner needle 5, the space is housed (installed) in 8 3.

The shutter member 8 5, needlepoint 5 1 of the inner 釙 5 is moved in the proximal direction, passes through the space 8 3, first portion 8 6 and second portion 8 7, respectively, their 弹性substantially return to its original shape by the force, a second position (position shown in FIG. 1 2). By the proximal side of the second portion 8 7 to such a configuration, shirt evening some member 8 5, in the first position (position shown in FIG. 1 1), the first portion 8 6 and site 8 7 2 are deformed respectively, it becomes more strongly compressed state. For this reason, the shutter member 8 5, restore to the second position (position shown in FIG. 1 2) is more securely made.

<Sixth Embodiment>

Next, a description will be given of a sixth embodiment of the indwelling needle assembly of the present invention.

Figure 1 3 is an enlarged vertical sectional view showing the configuration of the vicinity protection evening central unit included in the indwelling needle assembly of the sixth embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIG. 1 3, described earlier Symbol focusing on differences from the first and third embodiments, the same items will be omitted. 'In the indwelling needle assembly 1 of the sixth embodiment, except for the configuration of the protection evening body 8 1 and shirt evening some member 8 5 are different, which is the same as the first embodiment.

That is, protection evening body 81 includes a main body 8 1 1, secured to the outer peripheral portion of the main body portion 8 1 1 (e.g., fusion, adhesion, etc.) consists of two members of the been exterior portion 8 1 2 there. Depending manufacturing process because there is better to two members may be advantageous. Further, shirts evening first member 8 5 has a bent portion 8 6 3 formed by bending the base end portion of the first portion 8 6 (end of the bent portion 8 8 opposite).

Bent portion 8 6 3, as shown in FIG. 1 3, when shutter first member 8 5 is in the first position, abuts the top 8 6 3 a is the inner surface of the outer portion 8 1 2, the first portion 8 6 base end 8 6 near 1 is in contact with the distal end surface of the main body portion 8 1 1. Thus, the shutter member 8 5 increases the contact area between the protector body 81 of the inner surface. Ie, the bent portion 8 6 3 constitutes the contact area increasing means.

By providing such a bending portion 8 6 3, shirts evening to disperse the pressing force against the pro-Tech evening body 81 of the first member 8 5, can you to reduce the protection evening burden of the main body 8 1.

Moreover, such a bent part 8 6 3 has a function of preventing the vicinity of the proximal end 8 6 1 of the first portion 8 6, may enter the fixing portion of the body portion 81 1 and the outer portion 8 1 2 also it has. However, the configuration of the sixth embodiment of the protector body 81 and the shutter member 8 5 may be separately combined with other embodiments.

For this reason, by providing the bent portion 8 6 3, it is possible to improve the durability 1 "raw Protection evening body 8 1.

<Seventh Embodiment>

Next, a description will be given of a seventh embodiment of the indwelling 釙組 solid of the present invention.

1 4 is an enlarged longitudinal sectional view showing a configuration of an end portion of the second portion of the shutter evening one member indwelling needle assembly of the seventh embodiment is provided. Hereinafter, with the indwelling needle assembly 1 shown in FIG. 1 4, will be described by focusing the difference between the first and third embodiment, For the same matters will be omitted.

In the indwelling needle assembly 1 of the seventh embodiment, except Rukoto have different configuration of the shut evening first member 8 5 is the same as the first embodiment.

That is, the shutter member 8 5, as a friction reducing means, by bending toward the vicinity of the proximal end 8 7 1 of the second portion 8 7 on the inner needle 5 (protection evening body 81 along the center axis in the direction selfish) , and a bending portion 8 7 2 formed big tail shape. Bending portions 8 7 2, as shown in FIG. 1 4, when shirts evening first member 8 5 is in the first position, abuts against the outer peripheral surface of the inner needle 5, the frictional resistance between the outer peripheral surface of the inner needle 5 ( thereby reducing the sliding resistance). Thus, it is possible to proximal movement of the protection evening 8 of the inner needle 5 more circular smooth.

Note that the bent part 8 7 2, rather than clockwise as described in FIGS. 1-4, may be those made form counterclockwise.

Further, the bent part 8 7 2, as long as it can reduce the frictional resistance between the outer peripheral surface of the inner 釙 5 (sliding resistance) is not limited to the illustrated, eg, V-shaped Jo, U-shaped or the like may be formed in any shape.

<Eighth Embodiment>

It will now be described an eighth embodiment of the indwelling needle assembly of the present invention.

Figure 1 5 is an enlarged longitudinal sectional view showing a configuration of an end portion of the second portion of the shirt evening first member provided in the indwelling 釙組 stereoscopic eighth embodiment. Hereinafter, with the indwelling needle assembly 1 shown in FIG. 1 5, will be described by focusing the difference between the first and third embodiment, For the same matters will be omitted.

In the indwelling needle assembly 1 of the eighth embodiment, except Rukoto have different configuration of the shutter first member 8 5 is the same as the first embodiment.

That is, the shutter member 8 5, as a friction reducing means, and the vicinity of the proximal end 8 7 1 of the second portion 8 7 has a chamfered portion 8 7 3 formed by chamfering.

Chamfer 8 7 3, as shown in FIG. 1 5, when shirts evening first member 8 5 is in the first position, it abuts against the outer peripheral surface of the inner needle 5, the frictional resistance between the outer peripheral surface of the inner needle 5 thereby reducing the (sliding resistance). Thus, it is possible to proximal movement of the protection evening 8 of the inner needle 5 more smoothly.

The surface of the chamfered portion 8 7 3 is preferably as smooth as possible to so that processing the sliding resistance between the inner 釙 5 is applied.

Ku ninth embodiment>

Next is a description of a ninth embodiment of the indwelling 釙組 solid of the present invention.

Figure 1 6 is a longitudinal sectional view showing the construction of the distal side of Purochikuta indwelling 釙組 solid comprises the ninth embodiment. Hereinafter, Te indwelling needle assembly 1 {Kotsui shown in FIG. 1 6, will be described by focusing the difference between the first contact and the third embodiment, the same matters will be omitted.

In the indwelling 釙組 assembly 1 of the ninth embodiment, except Rukoto have different configuration of the shutter member 8 5 is the same as the first embodiment.

That, shirts evening first member 8 5 includes a first portion 8 6, and a second portion 8 7 existing through a curved portion which is curved (coupling portion) 8 8 'relative to first portion 8 6 It includes, and is formed in a substantially U shape as a whole.

With such a configuration, shirt evening first member 8 5, recovery from the first posture to the second posture is performed more reliably.

The radius of curvature of the curved portion 8 8 '(average) is not particularly limited, and example embodiment, 1. O mm is preferred in which the following, 0.1 2-0. More preferably about 5 mm . A larger radius of curvature is the upper limit of the bending portion 8 8 ', shirt evening first member 8 5, when the first position (position shown in FIG. 1 6), that to the fully compressed state can not, that is, when the amount of deflection is reduced. Ku CHAPTER 1 0 embodiment>

Next, a description will be given of a first 0 embodiment of the indwelling needle assembly of the present invention.

Figure 1 7 is a longitudinal sectional view illustrating the indwelling needle assembly of the first 0 embodiment (first position of the shutter member), 1 8 is indwelling needle assembly of the first 0 embodiment (shirt evening it is a longitudinal sectional view showing a second posture) of the part 5 material. Hereinafter, the indwelling needle assembly 1 shown in FIG. 1 and FIGS. 1 8, wherein the first focuses on the differences from the embodiment, similar matters, for will be omitted.

In the indwelling needle assembly 1 of the first 0 embodiment, except the this configuration of the detachment preventing means are different, is the same as the first embodiment.

0 The following describes the structure of the detachment preventing means 9 b of the first 0 embodiment.

Inner needle 5 that have different cross-sectional shapes of the needle tip 5 1 and around it from the base end portion. That is, the inner needle 5, the change portion (first engagement portion) 9 4 boundary at a distal end and a proximal side, is different its cross-sectional shape.

Inner 釙 5, than change portions 9 4, without the cross-sectional shape is flat portions of the distal end side, cross-sectional shape of the portion of the base end side has a substantially circular shape. Hereinafter, the portion of the change portion 9 4 from the tip side of the inner 釙 5, "flat portion 5 2" and refers, the change portion 9 of 4 than the proximal portion of the inner 釙 5, a "non-planar portion 5 3" say. Upon entering the blood in the inner needle and the flat portion 5 2 is provided on the distal end side of the inner needle 5 is advantageous in that more visible Shasui.

A method of changing the cross-sectional shape of the inner needle 5 (the flat portion 5 2 of forming method) is may be grinding (cutting), bending, pressing, virtuous preferable due plastic working punching and the like. According to plastic working, while retaining the wall thickness of the tube wall of the inner needle 5 (the flat portion 5 2) substantially constant in the circumferential direction, it is possible to deform the inner needle 5. Therefore, the inner needle 5, the strength of that is suitably held.

On the other hand, the needle body passageway 8 in second protection evening 8 (protection evening body 8 1), the tubular body 8 9, for example, fitting, screwing, force caulking, fusion bonding, by bonding or the like with an adhesive, solid They are wearing (fixed). Thus, the boundary between 釙体 passage 82 and the tubular body 8 9, the stepped portion (second engagement portion) 9 5 are formed.

As the material of the tubular body 8 9 is not particularly limited, for example, a resin material, metallic material, fiber material, glass material, a ceramic material, and the like.

The inner diameter r of the tubular body 8 9, or approximately equal to the outer diameter of the non-planar portion 5 3, or is set to a slightly larger value (see FIG. 1 7).

Flat portion 5 2, as described above, and has a flat shape. Therefore, protector 8 (protection evening body 8 1) accommodating the needle tip 5 1 of the inner 釙 5 (covered) state to, and you'll move distally relative to the inner needle 5 to protect evening 8 , stepped portions 9 5 engages the change portion 9 4, change portion 9 4 can not pass through the inner lumen of the tubular body 8 9 (see FIG. 1 8). Thus, protection evening 8 deviates from the needle tip 5 1 of the inner needle 5 (leaves) of is prevented. In such a changing portion 9 4 and the step portion 9 5, it is configured detachment preventing means 9 b.

Also, the flat portion 5 second outer diameter (maximum outer diameter) and R, when the inner diameter of the tubular body 8 9 (average) was r, RZ r is, for example, 1.0 2 to 1.3 0 about it is preferable to satisfy the relation 1. 0 4 to 1. more preferably satisfies 2 0 about relationships. If less than the above lower limit value, depending on such construction materials of the tubular body 8 9, which may function in the detachment preventing means 9 b is not sufficiently exhibited. On the other hand, if it exceeds the upper limit, depending on the dimensions of the tubular body 8 9, excessively large outer diameter of the flat portion 5 2, upon puncture of the inner needle 5 vessels, there are cases where the patient's burden is increased.

Such be cowpea the structure generates the same effect and advantage as those of the first embodiment is produced.

Further, the change portions 9 4 and the stepped portion 9 5, respectively, since it is formed on the inner needle 5 and protection evening 8, configuration is simple, no increase in the number of components, downsizing, it contributes to diameter reduction to.

Incidentally, the tubular body 8 9, protector evening but it may also be integrally formed with the body 81. ■

<First embodiment>

Next, a description will be given of a first embodiment of the indwelling needle assembly of the present invention.

Figure 1 9 is a longitudinal sectional view illustrating the indwelling needle assembly of the first embodiment (first posture of the shutter members), 2 0, indwelling needle assembly of the first embodiment (shirt evening it is a longitudinal sectional view showing a second posture) of a single member. Hereinafter, the indwelling 釙組 assembly 1 shown in FIG. 1 9 and 2 0, for the first focuses on the differences from the embodiment, the same matters will be omitted.

In the indwelling 釙組 assembly 1 of the first embodiment, except the this configuration of the detachment preventing means are different, is the same as the first embodiment.

The following describes the structure of the detachment preventing means 9 c of the first embodiment.

The inner needle hub 6, at its distal end, disposed plate-shaped lid member 6 4 so as to block the opening of the recess 6 3, contact is formed receiving space 6 5 for accommodating the cord 9 6 described later Ri, when puncturing operation and the like, never straps 9 6 gets in the way.

The lid member 6 4, a hole 6 4 1 is the inner needle 5 is 揷通 a substantially central portion, (connecting member form a linear or band) string at a position shifted outward from the hole 6 4 1 9 6 is a hole 6 4 2 that will be inserted, respectively, are formed through the lid member 6 4.

Straps 9 6 is the tip is protection evening 8 secured by letting you be embedded in (the protector body 81) (fixed), the proximal end (the end of Uchi釙 hub 6 side) It is not fixed or secured to the inner needle hub 6.

The proximal end portion of the cord 9 6,? And engaged with the 6 4 2 proximal edge, the locking portion 9 6 1 straps 9 6 is prevented from disengaging from Uchi釙Ha Bed 6 is provided. The locking portion 9 6 1, for example, tying the straps 9 6 bulk (e.g., spherical, etc.) securing the member of the string 9 6 (e.g., fusion, adhesive, etc.) formed by equal or be able to. The base end portion of the cord 9 6 Protection evening by not fixed to the main body 8 1, it is possible to housed in the housing space 6 5 with a minimum bending folding straps 9 6 'prevents the deformation of the straps 9 6 and it can be extended smoothly string 9 6 through the hole 6 4 2.

Examples of the material of the straps 9 6 is not particularly limited, for example, polyolefins such as polyethylene, polyvinyl chloride, polyurethane, polybutylene terephthalate evening resin material such as polyesters, such as rate, fiber materials such as cotton, various metal materials etc. can be mentioned, et al. are.

Such straps 9 6, multiplicity of single fibers or fiber according to the above materials (eg if, as a single fiber was 蹉Tsu, such as those woven monofilaments), nonwovens, or in the shape of such Fi Lum it can be used.

In the assembled condition of the indwelling needle assembly 1 (when to approximate protection evening 8 in the inner needle hub 6), straps 9 6 is folded in the relaxed state, the housing space 6 within 5 (Uchi釙 hub 6) It is housed (see Fig. 1 9). The protection evening 8 (the protector body 81) is accommodated needlepoint 5 1 of the inner needle 5 (covered) state, string 9 6, bawl state stretched. When you'll move distally relative to the inner needle 5 this time protection evening 8, the engagement portion 9 6 1 engaged with the base end side edge portion of the lid member 9 4 holes 9 4 2, holes 9 4 2 can not it to pass through (see Fig. 2 0). Thus, protection evening 8 deviates from 釙先 5 1 of the inner needle 5 (leaves) of is prevented. In such a cord 9 6, it is constituted detachment preventing hand stage 9 c.

The length of cord 9 6, in needlepoint 5 1 housing the state of the inner needle 5 protection evening 8, preferably set to such an extent that slightly slack remains. This makes it possible to straps 9 6 after the needle tip 5 1 reliably is housed within the protector 8 shirt evening first member 8 5 has come second posture to be effective as a detachment preventing means. Ie, it is possible to fix the protection evening 8 securely to 釙先 5 1.

Even cowpea to such a configuration, the same effect 'effects as the first embodiment occurs.

Incidentally, the storage space 6 5, alternatively the inner needle hub 6, be formed in the protector 8 (protection evening body 8 1), the inner 釙 Hachibu 6 and protection evening may be formed on 8 stop both.

Although the puncture device and the indwelling needle assembly of the present invention have been explained embodiments illustrated in the drawings, the present invention is not limited thereto, the parts constituting the indwelling needle assembly, similar it can be replaced with an arbitrary configuration capable of exhibiting the function. Further, the puncture tool and the indwelling needle assembly of the present invention, the first to the first embodiment sac Chino, may be a combination of any two or more configurations.

The connecting unit described above, the first and second sections integrally with, but been filed which was formed by bent or curved plate member is not limited thereto, respectively the first portion and the tip portion the Judges of the second part comprises a sheet member, for example, screws, pins, force caulking, fitting, bonding, fusion, welding, fixed or spring or the like in brazing, etc. or it may be provided by coupling. Industrial Applicability

As described above, according to the present invention, hardly attached bends favorite phrase shutter member, a long period of time since they have stored sufficient resiliency even (function), the shutter member is reliably operated. Therefore, once the protector needle tip housed in the evening can be reliably prevented from protruding from the tip of the back protector, high safety upon disposal processing, or the like

'There.

In particular, by appropriately selecting the shape of the shutter member, it is possible to further securely improve the resilience.

Further, in the case of providing the detachment preventing means, once covered the evening is (leaves) Ru out protection from 釙先 it is prevented.

Claims

The scope of the claims
1. A needle body having a needle tip at the distal end, a hub provided at the proximal end of the needle body, a puncture device having a protection evening and covering the needle tip,
The protection evening includes a protector evening body having a 揷通 capable needle body passageway the needle body,
Wherein 釙体 having a second orientation and can be displaced in a shirt evening first member to deter passage of the needle tip 揷通 possible first orientation and the 釙体 to the needle body passageway,
The shutter member includes a first portion, said first and a second site present via the connection portion to the site of, the opposite end portions and the connecting portion of the first region, puncture device the distance between the opposite end portions and said connecting portion of the second portion, characterized in that it is configured to strange I inhibit in said first position and said second position .
2. The shutter first member, by some even without least the first portion and / or the second portion is elastically deformed, to claim 1, wherein the distance is configured to change puncture instrument described.
3. Wherein at least one of the first portion or the second site, puncture instrument according to claim 1 or 2 having a protrusion protruding toward the other.
4. The protrusion 穿剌 device of claim 3 is obtained by forming by bending or flexing the first site and Z or the second region.
5. The shutter member is disposed on the needle body middle which is formed in the space of the passage, said second portion, when the first position, an end portion of the connecting portion opposite said the outer peripheral surface of 釙体 claims 1 abuts to puncture 剌具 according to any one of the 4.
6. The first site and the second site, when in said second position, an end portion opposite to the consolidated portion, respectively, configuration to abut the inner surface of the protector evening body It claims 1 and is to puncture device according to any one of the 5.
7. End of said connecting portion opposite the first portion, said opposite end and near the connecting portion between the connecting portion of the second part, when said second position, respectively , 穿剌 tool according to one of claims 1 to 5 Neu displacement is configured to abut against the inner surface of the protection evening body.
8. The first site is the opposite side Me end and the connecting portion, the puncture device according to claim 6 or 7 having a contact area increasing means for increasing the contact area between the inner surface of the protector body.
9. The contact area increasing means is a puncture instrument according to claim 8 in which the said connection portion of the first part the ends of the opposite side, a bending portion formed by bending.
1 0. The first site is a puncture instrument according to any one of the connecting portion and to end opposite claims 1 and is fixed to the protector evening body 5.
1 1. The second part is the end opposite to the connecting portion, according to any one of claims 1 to 1 0 having a friction reducing means for reducing the frictional resistance between the outer peripheral surface of the 釙体of 穿剌 tool.
1 2. The friction reducing means, the end opposite to the said connection portion of the second portion is constituted by a beveled portion formed by folding portions or chamfered formed by bending Ri folding puncture device according to claim 1 1 has.
13. The coupling portion puncture device according to any one of claims 1 to 12 is composed of a bent portion which is bent in a V shape.
14. The coupling portion includes a curved portion that is curved, puncture device according to any one of the radius of curvature (average) of 1. 0 mm or less claims 1 to 12.
15. The shutter member is formed of a strip-shaped plate member, the puncture device according to any one of the thickness of claims 1 is 0. 04~ 0. 2 mm 14.
16. The shirt evening first member, the lubricant on the surface; 穿剌 tool according to ^ any one of claims 1 to 15 are assigned.
17. In a state where the protection evening has covered the needle tip of the needle body, to the protector claims 1 having a detachment preventing means for preventing the disengaged from the needle tip of said needle body
16 穿剌 tool according to any one of. ,
18. The needle body is an inner needle of the tubular, the hub 穿剌 tool according to claim 1 of stone 17 is Uchi釙 hub.
19. a puncture device according to claim 18,
Hollow and outer needle of the inner needle can be inserted,
Indwelling needle assembly and having an outer needle hub disposed at the proximal end of the outer needle.
20. The protection evening and the outer needle hub and distills 置釙 assembly according to fittable claim 19.
PCT/JP2001/004942 2000-06-12 2001-06-12 Puncturer and self-retaining needle assembly WO2001095958A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000-175172 2000-06-12
JP2000175172 2000-06-12
JP2001-137716 2001-05-08
JP2001137716A JP4942256B2 (en) 2000-06-12 2001-05-08 Puncture tool and the indwelling needle assembly

Publications (1)

Publication Number Publication Date
WO2001095958A1 true true WO2001095958A1 (en) 2001-12-20

Family

ID=26593732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/004942 WO2001095958A1 (en) 2000-06-12 2001-06-12 Puncturer and self-retaining needle assembly

Country Status (2)

Country Link
JP (1) JP4942256B2 (en)
WO (1) WO2001095958A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133109A1 (en) * 2007-03-30 2009-12-16 Terumo Kabushiki Kaisha Indwelling needle assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20210394U1 (en) * 2002-07-04 2002-09-12 Braun Melsungen Ag catheter introducer
JP4966860B2 (en) * 2005-10-25 2012-07-04 テルモ株式会社 Indwelling needle assembly
US7744567B2 (en) * 2006-11-22 2010-06-29 Becton, Dickinson And Company Reducing withdrawal force in a safety IV catheter
EP2941289A4 (en) * 2013-01-03 2016-11-02 Vigmed Ab Spring clip needle guard
JP6138921B2 (en) * 2013-04-01 2017-05-31 テルモ株式会社 Catheter assembly
KR101491953B1 (en) * 2014-07-21 2015-02-11 송재원 Medicine injection niddle unit having stick injury and infection preventing fuction

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979000239A1 (en) * 1977-10-26 1979-05-03 Konsinvenior Ab A destruction device for injection needles
JPH0261352U (en) * 1988-10-25 1990-05-08
US5344408A (en) * 1993-08-06 1994-09-06 Becton, Dickinson And Company Break-away safety shield for needle cannula
EP0750917A2 (en) * 1995-06-07 1997-01-02 JOHNSON &amp; JOHNSON MEDICAL, INC. Tip protection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6004294A (en) * 1998-04-09 1999-12-21 Becton, Dickinson And Company Catheter and introducer needle assembly with needle shield

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979000239A1 (en) * 1977-10-26 1979-05-03 Konsinvenior Ab A destruction device for injection needles
JPH0261352U (en) * 1988-10-25 1990-05-08
US5344408A (en) * 1993-08-06 1994-09-06 Becton, Dickinson And Company Break-away safety shield for needle cannula
EP0750917A2 (en) * 1995-06-07 1997-01-02 JOHNSON &amp; JOHNSON MEDICAL, INC. Tip protection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133109A1 (en) * 2007-03-30 2009-12-16 Terumo Kabushiki Kaisha Indwelling needle assembly
EP2133109A4 (en) * 2007-03-30 2014-10-15 Terumo Corp Indwelling needle assembly

Also Published As

Publication number Publication date Type
JP2002126080A (en) 2002-05-08 application
JP4942256B2 (en) 2012-05-30 grant

Similar Documents

Publication Publication Date Title
US6832992B2 (en) Passive safety device for needle of blood collection set
US5314503A (en) Automatic sheath protection of hypodermic needle
US6527747B2 (en) Introducer needle assembly having a tethered needle shield
US5911705A (en) One step catheter advancement automatic needle retraction system
US6582402B1 (en) Catheter-advancement actuated needle retraction system
US5092851A (en) Safety needle with spring-loaded shield
US6461362B1 (en) Catheter insertion device with retractable needle
US7303548B2 (en) Catheter introducer assembly having safety shielded needle
US20020099339A1 (en) Passive safety device
US6997913B2 (en) Needle safety device
US20030120222A1 (en) Safety needle
US20030093009A1 (en) Needle safety device
US6224569B1 (en) Compact needle point shield
US6942652B1 (en) Retractable I-V catheter placement device
US20090204026A1 (en) Safety Blood Collection Assembly With Indicator
US6969376B2 (en) Safety indwelling needle
US20030229316A1 (en) Medical device
US5501675A (en) Safety catheter assembly having safety stop push button
US7428773B2 (en) Method for making a safety shield assembly and related combinations thereof
US6652486B2 (en) Safety catheter
US20040243061A1 (en) Safety needle and catheter assembly
US20040116864A1 (en) Catheter introducer assembly having safety shielded needle before and after use
US7717888B2 (en) Safety needle with collapsible sheath
US20080119795A1 (en) Needle Shielding Device
US6638254B2 (en) Indwelling needle assembly

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase