CN201906288U - Puncturing preventing venous indwelling needle with positive pressure connector - Google Patents

Abstract

The utility model discloses a puncturing prevention venous indwelling needle which comprises a needle sheath, a guide pipe component and a puncture needle component, wherein the guide pipe component comprises a guide pipe, a three-way conduit seat, a funnel, a sealing plug, a hose, a three-way seat, a heparin cap, an end cap and a clamp; the puncture needle component comprises a puncture needle tube, a needle stand with wings, and a puncturing prevention device; and the puncturing prevention device comprises a connecting part, a hollow sliding sleeve and a locking and closing component. When the puncturing prevention venous indwelling needle withdraws from the puncture needle tube normally, the tip of the puncture needle tube is shielded inside the hollow sliding sleeve, so as to prevent infection caused by that the puncture needle accidentally punctures medical staff after being used. Besides, after the infusion is finished and an infusion connector or an injector for tube sealing is screwed out, the phenomenon of pipe drawing caused by blockage inside the guide pipe due to blood coagulation can be avoided. In the utility model, only the puncturing prevention device is added, the needle tube seat is improved, and the end cap is replaced with a positive pressure connector, so that the operation is enabled to be more convenient and the use is safer.

Description

Anti-needle puncture venous indwelling needle with positive pressure connector

technical field

The utility model relates to a disposable medical device, in particular to an anti-acupuncture venous indwelling needle with a positive pressure joint.

Background technique

The disposable venous indwelling needles currently used in clinical units of various domestic medical institutions are mainly composed of needle sheaths, catheter assemblies, and puncture needle assemblies. Among them: catheter assemblies include catheters, three-way catheter sockets, funnels, sealing plugs, and hoses. , three-way seat, heparin cap, end cap, clip, the catheter is sleeved from the outer wall of the funnel to the root and locked on the inner wall of the inner cavity of the head of the three-way catheter seat through the funnel, a clip is connected in the middle of the hose, and its two ends are connected to the three-way catheter The catheter base and the three-way base are firmly connected, the heparin cap and the end cap are screwed on the straight hole and the side port of the three-way base, and the sealing plug is installed and sealed at the branch in the straight hole of the three-way catheter base; the puncture needle assembly It consists of a puncture needle tube and a winged needle seat. When this product is used clinically, the puncture needle is used to puncture the peripheral vein of the human body, and at the same time, the catheter is brought into the blood vessel, the puncture needle is pulled out, and the catheter is left in the blood vessel of the human body for several days, thereby avoiding the patient's repeated venipuncture. Pain, and thus widely used clinically. However, the problem of how to prevent the puncture needle from causing harm to the medical staff after the patient is punctured is placed in front of people, especially the puncture after being used by patients with infectious diseases (such as: hepatitis B, AIDS patients). The consequences of a needlestick injury are unimaginable. In addition, due to improper sealing of the tube by the medical staff after the end of the infusion, blood coagulation is likely to cause blockage in the catheter and lead to extubation.

Utility model content

The purpose of this utility model is to provide an anti-acupuncture venous indwelling needle with a positive pressure joint, which can shield the puncture needle in the hollow sliding sleeve when the venipuncture is completed and the puncture needle is pulled out, thereby preventing the medical staff from being Accidental puncture with exposed needle. In addition, after the infusion is finished, unscrewing the infusion connector or the syringe for sealing the tube can ensure that the channel of the catheter assembly is in a positive pressure state, and blood cannot enter the catheter for a period of time, thereby avoiding the phenomenon of extubation caused by blockage in the catheter caused by blood coagulation.

In order to achieve the above purpose, the utility model adopts the following technical solutions: the utility model is composed of a needle sheath, a catheter assembly, and a puncture needle assembly, wherein: the catheter assembly includes a catheter, a three-way catheter seat, a funnel, a sealing plug, a hose, three Through seat, heparin cap, positive pressure connector, clip, the catheter is sleeved from the outer wall of the funnel to the root and locked on the inner wall of the inner cavity of the head of the three-way catheter seat through the funnel. The seat and the three-way seat are firmly connected, the heparin cap and the positive pressure joint are screwed on the straight hole and the side port of the three-way seat, and the sealing plug is installed and sealed at the branch in the straight hole of the three-way catheter seat; the puncture needle assembly It includes a puncture needle tube, a winged needle seat and an anti-needle puncture device. The anti-needle puncture device is composed of a connecting piece, a hollow sliding sleeve and a locking buckle. The exposed part of the root is between 0 and 1mm, and the winged needle seat is placed in the hollow sliding sleeve of the anti-acupuncture device, and the anti-acupuncture device is placed on the large end of the straight hole of the three-way catheter seat; the feature is: the rear end of the winged needle seat There is a tapered boss undercut and the back of the anti-acupuncture device. Connected to the straight large orifice end of the three-way catheter seat, and the positive pressure joint is screwed to the side hole end of the three-way seat; the puncture needle tube has at least one side hole 2 mm to 7 mm below the root of the inclined plane; the winged needle seat The wings are flat, and the wings can be designed as single wings or double wings. The shapes of the wings can be the same or different; slot; the inner hole of the locking buckle can be set as a spline groove or a round buckle; the undercut at the rear end of the winged needle seat can be set as a conical boss shape or a double-sided card shape; the connecting piece in the anti-needle device , The hollow sliding sleeve and the locking buckle can be divided into three parts, and the connecting piece and the hollow sliding sleeve or the hollow sliding sleeve and the locking buckle can also be integrated; the length of the chute of the hollow sliding sleeve should be greater than the puncture The length of the needle tube; the positive pressure joint can be screwed to the side hole end of the three-way seat, and can also be screwed to the straight hole end of the three-way seat, or both the straight hole and the side hole end of the three-way seat can be screwed to the positive pressure joint.

Due to the adoption of the above-mentioned technical solution, during the normal withdrawal process of the puncture needle tube, the tip of the puncture needle tube is shielded in the hollow sliding sleeve at the same time, thereby preventing the medical staff from being accidentally stabbed by the used puncture needle and causing infection. In addition, after the end of the infusion, the infusion connector or the syringe for sealing the tube can be unscrewed, which can avoid the phenomenon of extubation caused by blockage in the catheter due to blood coagulation. The utility model only adds an anti-acupuncture device, improves the needle tube seat, and replaces the end cap with a positive pressure joint, so that the operation is convenient and the use is safer.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic structural view of the catheter assembly after the puncture needle assembly of the present invention is drawn out;

Fig. 3 is a schematic structural view of the puncture needle of the present invention being pulled out to the bottom of the hollow sliding sleeve and shielded.

Detailed ways

Below in conjunction with embodiment and with reference to accompanying drawing, the utility model is described in further detail.

As can be seen from Figure 1, the utility model is composed of a needle sheath 15, a catheter assembly, and a puncture needle assembly, wherein: the catheter assembly includes a catheter 5, a three-way catheter seat 2, a funnel 6, a sealing plug 3, a hose 7, three Through seat 8, heparin cap 9, positive pressure connector 10, clip 11, catheter 5 is set on the outer wall of funnel 6 to the root and locked to the inner wall of the inner cavity of the head of three-way catheter holder 2 through funnel 6, and the middle part of hose 7 is connected Clip 11, its two ends are firmly connected with the three-way catheter seat 2 and the three-way seat 8, the heparin cap 9 and the positive pressure joint 10 are screwed on the straight hole and the side port of the three-way seat 8, and the sealing plug 3 is installed on the three-way The puncture needle assembly includes a puncture needle tube 1, a winged needle holder 4 and an anti-acupuncture device. The anti-acupuncture device consists of a connecting piece 13, a hollow sliding sleeve 12 and a locking buckle. Composed of 14, the puncture needle tube 1 passes through the sealing plug 3, so that the inclined surface of the needle tip is completely exposed at the end of the catheter 5, and the exposed part of the root of the inclined surface is between 0 and 1 mm, and the winged needle seat 4 is placed in the hollow sliding sleeve of the anti-acupuncture device 12, the anti-acupuncture device is set on the large end of the straight hole of the three-way catheter seat 2; it is characterized in that: the rear end of the winged needle seat 4 is provided with a conical boss undercut 4a and the rear part of the anti-acupuncture device is provided with a cone Shaped boss upside-down locking buckle 14, hollow sliding sleeve 12 is provided with an axial chute 12a, connector 13 of anti-acupuncture device is sleeved on the straight-through large orifice end of three-way catheter seat 2; puncture needle tube 1 is in There is at least one side hole 1a below 2mm to 7mm of the root of the slope; the wings of the winged needle holder 4 are flat, and the wings can be designed as single wings or double wings, and the shapes of the wings can be the same or different; The chute 12a of the hollow sliding sleeve 12 of the anti-acupuncture device can be set as a single groove or a double groove; the inner hole of the locking buckle 14 can be set as a spline groove type or a round buckle; The undercut 4a at the end can be set as a tapered boss shape or a double-sided card shape; the connecting piece 13, the hollow sliding sleeve 12 and the locking buckle 14 in the anti-acupuncture device can be divided into three parts, and the connecting piece can also be divided into three parts. 13 and the hollow sliding sleeve 12 or an accessory that integrates the hollow sliding sleeve 12 and the locking buckle 14; the length of the chute of the hollow sliding sleeve 12 should be greater than the length of the puncture needle tube; the positive pressure joint 10 can be screwed to the three-way seat The side hole end of 8 also can be screwed on the straight hole end of tee seat 8, or the straight hole and the side hole end of tee seat 8 are all screwed into positive pressure joints.

In Fig. 3, the puncture needle of the present invention pulls back the winged needle seat 4 after the puncture is successful, until the undercut 4a is locked with the locking buckle 14, and the needle tip is shielded in the hollow sliding sleeve, thereby avoiding being injured by the puncture needle .

In Fig. 2, after the puncture needle assembly of the present utility model is pulled out, the sealing plug 3 in the catheter assembly is automatically closed due to its own elasticity so that the infusion pipeline does not leak; after the positive pressure joint is unscrewed from the infusion joint or the syringe joint, The inner plug in the positive pressure connector resets and expands to squeeze the inner cavity to squeeze the liquid in the inner cavity to the catheter head, so as to prevent the blood in the blood vessel from flowing back into the field tube and causing blockage and extubation; in addition, during the infusion process, the heparin cap can The puncture is used for temporary dosing; the heparin cap can also be punctured for infusion, which is convenient for users.

Claims (9)

1. anti-acupuncture venous detaining needle with positive pressure connector, by needle shield, conduit tube component, the puncture needle assembly is formed, wherein: conduit tube component comprises conduit, the threeway catheter block, funnel, sealing-plug, flexible pipe, the threeway seat, calparine cap, positive pressure connector, clip, conduit is placed in the funnel outer wall to root and tightly lock in the interior cavity wall of threeway catheter block head by funnel, flexible pipe middle part string one clip, its two ends firmly are connected with the threeway seat with the threeway catheter block, calparine cap and positive pressure connector are rotatably connected on the straight hole and side opening port of threeway seat, and sealing-plug is installed on mouthful place and the sealing in the threeway catheter block clear opening; The puncture needle assembly comprises puncture needle tubing, band wing needle stand and Needlestick prevention device, Needlestick prevention device is made up of connector, hollow sliding sleeve and sealed button, the puncture needle tubing passes through sealing-plug, make pinpoint inclined plane expose the conductor housing end fully, to its inclined-plane root exposed portions serve be between 0～1mm, band wing needle stand places in the hollow sliding sleeve of Needlestick prevention device, and Needlestick prevention device is placed in the big end of threeway catheter block straight hole; It is characterized in that: the rear portion that the rear end of band wing needle stand is provided with a cone boss back-off and Needlestick prevention device is provided with one and buckles with the cone boss back-off is sealed, the hollow sliding sleeve is provided with an axial slide, the connector of Needlestick prevention device is socketed on the straight-through big orifice end of threeway catheter block, and positive pressure connector is rotatably connected in the side opening end of threeway seat.

2. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 1, it is characterized in that: described puncture needle tubing has at least one side opening under the 2mm～7mm of inclined-plane root.

3. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 1, it is characterized in that: the wing of described band wing needle stand is a flat, and the wing can be designed to single-blade, also can be made as double-vane, and the shape of double-vane can be identical, also can be inequality.

4. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 1, it is characterized in that: the chute of the hollow sliding sleeve of described Needlestick prevention device can be made as single cavity, also can be made as double flute.

5. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 1, it is characterized in that: described sealed button endoporus can be made as spline grooved or round buckle.

6. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 1 is characterized in that: the back-off of described band wing needle stand rear end can be made as the cone boss shape or be that bilateral is card-like.

7. a kind of anti-acupuncture venous detaining needle as claimed in claim 5 with positive pressure connector, it is characterized in that: the connector in the described Needlestick prevention device, hollow sliding sleeve and sealed button can be divided into three accessories, can be the accessory of one with connector and hollow sliding sleeve or with hollow sliding sleeve and sealed button also.

8. a kind of anti-acupuncture venous detaining needle with positive pressure connector as claimed in claim 4, it is characterized in that: the chute length of described hollow sliding sleeve should be greater than the length of described puncture needle tubing.

9. a kind of anti-acupuncture venous detaining needle as claimed in claim 1 with positive pressure connector, it is characterized in that: described positive pressure connector can be rotatably connected in the side opening end of threeway seat, also can be rotatably connected in the straight hole end of threeway seat, or the straight hole of threeway seat and the side opening end positive pressure connector that all spins.

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