JP4222142B2 - Wing indwelling needle - Google Patents

Description

  The present invention relates to a winged indwelling needle used for hemodialysis, continuous / intermittent drug administration, or intermittent blood sample collection.

  Conventionally, in treatment and treatment in which a so-called winged indwelling needle in which a wing for fixing a human body is attached to a metallic needle is fixed to the skin surface for a long time, the pain of the patient is extremely large. For example, in hemodialysis, blood is drawn from the artery of a patient with renal disease such as chronic renal failure, uremia, or renal anemia, and the blood is dialyzed through a semipermeable membrane of an artificial dialyzer to bring the blood into contact with the blood. A method of taking out substances such as urea nitrogen and creatinine into the dialysate and returning the purified blood from the veins to the patient's body has already been widely practiced in Japan and overseas. Although this dialysis method varies depending on the patient's condition, it is usually carried out 2 to 3 times per week, and the required time per time is usually 2 to 6 hours. Each time a patient is pierced with a thick metal puncture needle through an internal shunt or an artificial blood vessel, the blood circuit is connected to an artificial dialyzer, and the puncture needle is left on the arm or the like during the required time.

  However, in the conventional method, since the needle tube excluding the indwelling needle having the synthetic resin mantle tube is made of metal when the metal thick puncture needle is indwelled, the blood vessel wall is often damaged by the needle tube. Patients undergoing dialysis have been extremely painful because they are required to move as little as possible during dialysis treatment. In addition, in the case of a fixing method in which a metal puncture needle and a needle fixing part as in the conventional method are integrated, and wing pieces provided on both sides from the needle fixing part are fixed to the skin surface with a tape or the like, Since the puncture angle and the indwelling angle do not coincide with each other depending on how the tape is applied, there has been a problem that the needle tip is in close contact with the vein wall and medication cannot be performed smoothly, or the blood vessel wall is damaged by the needle tip.

In order to solve this puncture angle problem, Japanese Patent Application Laid-Open No. 10-151197 proposes that the needle tip is lifted by tilting and holding the injection needle at a certain angle. Further, Oite the indwelling needle of the above-mentioned patent document 1 is also been proposed to place a cushion material between the adhesive portion which is adhered to the pedestal and the skin surface for setting an injection needle at a constant angle This means that the needle will follow even if the needle moves somewhat.

Japanese Patent Laid-Open No. 10-151197 (2-3 pages, FIGS. 1, 2, 3, 4)

However, the angle inclination proposed in Japanese Patent Application Laid-Open No. 10-151197 has a narrow adjustment range even when a cushioning material is used, and it has a movement force that pulls the tube connected to the needle fixing portion of the puncture needle. It is difficult to resist and is basically a setting based on the premise that the patient hardly moves the body.
That is, in the conventional winged indwelling needle, the wing piece fixed to the skin surface and the needle fixing portion are structured so as to move almost integrally except for the direction in which the wing piece is folded. The movement of the wing piece is transmitted to the needle tip of the puncture needle as it is when the body moves and the tube is pulled, etc., and the puncture angle of the puncture needle changes or the needle tip moves to the left and right In many cases, the tip of the puncture needle touches the blood vessel wall and damages the blood vessel wall.

  In view of the above-mentioned drawbacks, the present invention was made in order to provide an indwelling needle used for dialysis and the like for the purpose of reducing a load applied to a living body during indwelling, and a needle fixing portion of a puncture needle, The wing pieces are connected more flexibly, and the structure of the part connected from the needle fixing part to the tube for dialysis or drug administration does not press the skin, and the patient's body moves and the tube moves Even when the needle is pulled, it absorbs a certain amount of movement up to the needle fixing part of the puncture needle, and further, the puncture needle itself is made of synthetic resin, and the damage to the blood vessel wall even if the needle tip touches the blood vessel wall The aim is to minimize the above.

  In order to solve the above-mentioned problems, the indwelling needle with a wing according to the present invention has an outer wall of a needle hub to which a rear end portion of a needle tube having a puncture end portion is connected, substantially perpendicular to the axis of the needle hub and substantially horizontal to each other. A pair of elastic thread-like connecting bodies is extended to each other, and a fixing wing piece is connected to the tip of the thread-like connecting body.

  According to the present invention, since the needle hub to which the needle tube is connected and the fixing wing piece are connected via an elastic thread-like connecting body, the force transmitted to the fixing wing piece is directly applied to the needle of the puncture needle It is not transmitted directly to the front, but the movement of the puncture needle in the direction of changing the puncture angle or the movement of swinging the needle tip to the left or right is weakened at the elastic thread-like connecting body, and the movement of external force is fixed to the needle of the puncture needle Since it can be absorbed before the part, the movement of the indwelling needle is prevented, which is preferable.

  Further, the indwelling needle with a wing according to the present invention is configured such that the needle hub is held by the connection tube, and the axis of the connection tube is curved in the middle so as to be detached from the axis of the needle tube. By intentionally deflecting the part connected to the dialysis and drug solution administration tube from the needle fixing part from the axis of the needle tube, that is, the upper part of the blood vessel, even if the part is fixed, the blood vessel is not compressed. The tube can be guided in such a way.

  Furthermore, in the indwelling needle with a blade according to the present invention, a sliding ring is inserted into a connecting tube, and a thread-like connection having a pair of elasticity in a substantially horizontal direction with respect to the axis of the sliding ring on the outer wall of the sliding ring. The body is extended, and the wing pieces are connected to the tips of the thread-like connecting body, so that the part connected to the tube for dialysis and drug administration can be stably fixed to the skin surface. In addition, a wing piece with the above-described thread-like connection body having elasticity that is highly flexible with respect to external force is used for fixing, and the thread-like connection body extends to the outer wall of the sliding ring that can slide the connection tube. Because it is installed, it can be freely fixed according to the patient's posture and other conditions, and by providing an intermediate part that connects the needle fixing part to the tube for dialysis or drug administration, Moving Even in a case where the occurring for example tube is moving patient's body is pulled by a stable placement state without even winged indwelling needle is pulled directly is maintained.

  Furthermore, in the winged indwelling needle of the present invention, the needle tube to be used is made of a synthetic resin having rigidity and flexibility, so that the needle tube itself has a flexibility compared to a conventional metal needle. Softness at the time of contact is added, and the blade surface and the cutting edge can be easily blunted at the time of forming the needle tube, so that damage to the blood vessel wall can be minimized even if it contacts the blood vessel wall. Here, blunting refers to a state that is not sharp, and in the synthetic resin puncture needle used for the indwelling needle with a wing of the present invention, the edge of the blade edge and the blade surface is about 20 μm to 100 μm (more preferably 30 μm to 70 μm). A radius of about is preferred.

  As described above in detail, the winged indwelling needle of the present invention is substantially perpendicular to the axis of the needle hub and substantially horizontal to the outer wall of the needle hub to which the rear end of the needle tube having the puncture end is connected. A pair of elastic thread-like connecting bodies is extended to the needle hub to which the needle tube is connected and the fixing wing piece is connected via the elastic thread-like connecting body. The transmitted force is not directly transmitted to the needle tip of the puncture needle, but the movement in the direction in which the puncture angle of the puncture needle changes and the movement of swinging the needle tip to the left and right are weakened at the part of the elastic thread-like connecting body, and external force Can be absorbed before the needle fixing portion of the puncture needle, which is preferable because the movement of the indwelling needle is prevented.

  The winged indwelling needle according to the present invention is configured such that the needle hub is held by a connection tube and the axis of the connection tube is curved in the middle so as to be disengaged from the axis of the needle tube. By deliberately deflecting the portion connected to the tube for drug administration from the axial center of the needle tube, that is, the upper part of the blood vessel, the tube can be prevented from being compressed even if it is fixed on it. Can lead.

  Furthermore, in the indwelling needle with a blade according to the present invention, a sliding ring is inserted into a connecting tube, and a thread-like connection having a pair of elasticity in a substantially horizontal direction with respect to the axis of the sliding ring on the outer wall of the sliding ring. The body is extended, and wing pieces are connected to the tips of the thread-like connecting body. The part connected to the tube for dialysis and drug administration is stably fixed to the skin surface, and Because the wing piece with the above-mentioned thread-like connecting body having high flexibility with respect to external force is used for fixing, and the thread-like connecting body extends from the outer wall of the sliding ring that can slide the connecting tube. It can be fixed freely according to the patient's posture and other conditions, and by providing an intermediate part connected from the needle fixing part to the tube for dialysis or drug administration, for example, the patient's movement etc. Without being pulled directly winged indwelling needle such as when pulled tube body movements, stable placement state is maintained.

Furthermore, in the winged indwelling needle of the present invention, when the needle tube to be used is made of a synthetic resin having rigidity and flexibility, the needle tube itself is more flexible than the metal needle at the time of contact with the blood vessel. Softness is added, and the blade surface and cutting edge can be easily blunted at the time of forming the needle tube, so that damage to the blood vessel wall can be minimized even if it contacts the blood vessel wall.
In addition, by making the needle tube made of a synthetic resin material together with other parts of the indwelling needle with the wing of the present invention, incineration is easy and handling is easy in terms of waste treatment, and contamination is prevented after using the indwelling needle with the wing of the present invention. It is extremely beneficial to be able to dispose of it reliably.

Hereinafter, an embodiment of the indwelling needle with wings of the present invention will be described with reference to FIG.
In FIG. 1, A is a winged indwelling needle of the present invention, and this indwelling needle A for dialysis comprises a needle tube 1, a connecting tube 2, a needle hub 3, a thread-like connecting body 4, a blade piece 5, and a luer connector 6.

The needle tube 1 preferably has a length of about 3 to 20 mm, more preferably 5 to 10 mm, which requires a distance from the puncture site on the skin surface of the patient to the puncture portion of the blood vessel. As the material, a needle diameter of 0.5 mm to 1.8 mmφ (outer diameter) made of metal such as stainless steel is used.
When the needle tube 1 is made of a synthetic resin material, polyurethane, polypropylene, polycarbonate, ABS resin, polyethylene, polytetrafluoroethylene, polyethersulfone, or the like is preferably used as the material type. In addition, as a needle diameter dimension, the thing of about 0.8-2.5 mmphi (outer diameter) a little larger than the thing of metal needle diameter dimensions, such as stainless steel, is used.
Further, the needle tube 1 is preferably made of the above-described one coated with an antithrombotic material or an antibacterial material, or a synthetic resin material in which these drugs are kneaded.

The connecting tube 2 is a portion connected from a later-described needle hub 3 to a tube for dialysis and drug administration, and is connected to a tube for dialysis and drug administration directly to the needle hub 3 as described later. 6 is used to buffer the force transmitted from the tube for dialysis and drug solution administration. The connecting tube 2 preferably has a certain degree of elasticity in order to function as a buffer material, and in the example of the embodiment of FIG. 1, the connecting tube 2 is curved in the shape of a crankshaft, which is a needle tube. The tube is guided so that it is not necessary to compress the blood vessel even if it is intentionally deflected from the upper axis of the blood vessel, ie, the upper part of the blood vessel, and fixed on it. Further, the connection tube 2 is preferably made of a material that can be bent freely on the spot according to the conditions of the medical site such as the posture of the patient, the skin surface and the site.
The material of the connection tube 2 includes thermoplastic elastomer (styrene, olefin, polyester, polyamide, polyurethane) as well as synthetic resins such as soft polyvinyl chloride, polybutadiene, polyurethane, polyester, polyamide, polyethylene, and polypropylene. Polyvinyl chloride), rubber-based synthetic resins, or those containing ethylene α-olefin copolymer, polypropylene α-olefin copolymer, ethylene-styrene random copolymer, etc. as the synthetic resin copolymer are preferably used.

Further, in the example of the present embodiment, the sliding ring 7 is inserted into the connection tube 2, and the outer wall of the sliding ring 7 is orthogonal to the axis of the sliding ring 7 and has a pair of elasticity in the horizontal direction. The thread-like connecting body 4 is extended, and the wing pieces 5 are respectively connected to the tips of the thread-like connecting body 4 and fixed to the skin surface of the patient. Incidentally, the sliding ring 7, the thread-like connecting member 4 described later, is manufactured by injection molding a synthetic resin material integrally with the wing 5, the polyurethane as the material used, polypropylene, polycarbonate, ABS resin, polyethylene, polytetra Fluoroethylene, polysulfone, soft polyvinyl chloride, rubber-based synthetic resins and elastomers are preferably used.
Alternatively, the sliding ring 7, the thread-like connecting member 4, the wing piece 5 may be one which is assembled are molded respectively separately, in addition to the synthetic resin material of stainless steel other corrosion resistance as corrosion resistant material Various metal materials may be used.

The needle hub 3 is connected to a rear end portion of the needle tube 1 and one end of the connection tube 2 opposite to one end to which the luer connector 6 is connected. Needle hub 3 is usually thread-like connecting member 4 described later, are manufactured integrally by injection molding the wing piece 5 of a synthetic resin material, polyurethane material used, polypropylene, polycarbonate, polyacetal, ABS resin, polyethylene, polytetrafluoro Ethylene, polysulfone, soft polyvinyl chloride, rubber-based synthetic resins and elastomers are preferably used. Alternatively, the needle hub 3, the thread-like connecting member 4, the wing piece 5 may be one which is assembled are molded respectively separately, a metal material such as stainless steel used as the corrosion-resistant material other than the synthetic resin material It may be done.

  The thread-like connecting body 4 is extended on the outer wall of the needle hub 3 in a thread shape that is substantially orthogonal to the axis of the needle hub 3 and has a pair of elasticity in the horizontal direction, and is molded from the synthetic resin material. As described above, suitable thicknesses and lengths are set in order to allow the threaded connecting body 4 to have appropriate flexibility with respect to the needle hub 3 and the wing part 5, and in this embodiment, for example, If the cross-sectional shape of the insertion portion 1 is circular when injection molding is performed with low-density polyethylene, the preferred diameter is 0.5 to 3 mmφ, more preferably 1 to 2 mmφ, and the preferred length is 0.5 to 10 mm. Preferably it is 1-5 mm.

The wing piece 5 functions as a fixing means for securely fixing to the skin. Further, it is used as a knob for inserting the needle tube 1 connected to the needle hub 3 by grasping it with a fingertip while the wing part 5 is folded.
As the shape of the wing portion 5, in addition to the pentagon shown in FIG. 1, a shape including a polygon such as a triangle and a quadrangle, a circle, an ellipse, an oval and the like can be adopted. And the area of the wing | blade part 5 is calculated | required that it is the magnitude | size which is easy to hold | grip when inserting the needle tube 1, can be fixed to the skin surface, and does not become a burden at the time of fixation, Preferably it is 20-500 mm < ² >. Yes, more preferably 50 to ²⁰⁰ mm ² .

The luer connector 6 is a connector for connecting to a tube connected from a device for dialysis and drug administration, and is generally injection-molded using the same synthetic resin material as that used for the needle hub 3 described above. Produced by.
The luer connector 6 is connected by a luer connection with a connector connected to one end of a tube connected to a device for dialysis, drug solution administration, or the like. In the present invention, the connection form with a device for dialysis, drug solution administration, etc. is not limited to the luer connection, but a general connection form such as a screw connection type or a fitting type is widely applied. Is done.

Next, the usage method of the indwelling needle A with a wing | blade of the said Example is demonstrated.
First, the needle tube 1 of the winged indwelling needle of the present invention is punctured into a patient's vein. Next, the wing portion 5 extending from the needle hub 3 is fixed to the patient's skin surface using a medical tape, and then the crankshaft of the connecting tube 2 connected to the rear end portion of the needle hub 3. The portion curved in a shape is aligned with a part such as a patient's arm, and is inserted into the connection tube 2 when the load is least applied to the puncture portion of the needle tube 1 puncturing the blood vessel from the patient's skin surface. The sliding ring 7 is fixed to the patient's skin surface while adjusting the position.

  Although the indwelling needle for hemodialysis has been described with respect to the above-described embodiments, the present invention provides a medical solution for use in which the luer connector 6 is connected, for continuous and intermittent drug administration to a patient. The present invention is also applied to a case where treatment / treatment is performed by being connected to a tube connected to the apparatus, or blood is collected and examined periodically.

It is a perspective view which shows an example of the indwelling needle with a wing | blade used for this invention.

Explanation of symbols

A Indwelling needle with wing of the present invention 1 Needle tube 2 Connection tube 3 Needle hub 4 Threaded connection body 5 Wing piece 6 Luer connector 7 Sliding ring

Claims (2)

On the outer wall of the needle hub to which the rear end portion of the needle tube having the puncture end portion is connected, a thread-like connecting body extending substantially orthogonal to the axis of the needle hub and having a pair of elasticity in the horizontal direction is extended. Ri Na and wing for each fixed to the end of the thread connecting member is connected,
A sliding ring is inserted into the connection tube held by the needle hub, and a thread-like connecting body extending in a direction substantially perpendicular to the axis of the sliding ring and having a pair of elasticity in the horizontal direction extends on the outer wall of the sliding ring. Each wing piece is connected to the tip of the thread-like connecting body,
Winged indwelling needle axis of the connection tube between the needle hub and the slide ring ing been bent in the middle so as deviate from the axis of the needle tube. The winged indwelling needle according to claim 1 , wherein the needle tube is made of a synthetic resin having rigidity and flexibility.

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