CN204864350U - Safe venous transfusion keeps somewhere needle subassembly - Google Patents

Abstract

The utility model relates to a safe venous transfusion keeps somewhere needle subassembly, be in with keeping somewhere the needle subassembly and setting up including puncture assembly puncture assembly and keep somewhere the safety device between the needle subassembly, safety device is including pressing from both sides cover and C font elasticity safety clamping piece, it is equipped with the axial passage who supplies the puncture syringe needle to pass to press from both sides in overlapping, syringe needle clearance fit's through -hole is equipped with on the both ends about the elasticity safety clamping piece and punctures, elasticity safety clamping piece sets up press from both sides in the cover, elasticity safety clamping piece upper end is elastic deformation under the through -hole state on the puncture syringe needle passes it, withdraws from under the through -hole state of elasticity safety clamping piece upper end at the puncture syringe needle, elasticity safety clamping piece upper end is in the through -hole is skew down in the elastic deformation effect axial passage. The utility model discloses safety device sets up at puncture assembly and to keep somewhere between the needle subassembly structure compacter, and it is more convenient to use.

Description

Safety IV Indwelling Cannula Assembly

technical field

The utility model relates to an intravenous transfusion indwelling needle assembly, in particular to a safe intravenous infusion indwelling needle assembly.

Background technique

The indwelling needle is an infusion device that replaces the traditional disposable infusion needle to reduce the pain of repeated puncture of the patient and the nursing workload of the medical staff, and has been widely used clinically. Its structure generally includes a puncture assembly composed of a needle hub and a puncture needle, a rubber stopper, a catheter hub, and an indwelling catheter. Wherein, the indwelling catheter is arranged at the front end of the catheter base, and the side of the catheter base is provided with puncture needle fins, and the indwelling catheter axially passes through to form a needle channel for moving the needle, and the rubber plug is fixedly arranged in the catheter base, and the puncture needle in the puncture assembly passes through the needle channel. Insert the indwelling catheter through the rubber stopper. When in use, guide the indwelling catheter through the puncture needle to puncture into the vein, then pull out the puncture assembly, and then use the indwelling catheter to continuously infuse the patient with arteriovenous liquid medicine. Since the puncture components are disposable, in order to avoid needle stabbing people during garbage disposal or recycling, resulting in secondary cross-infection, the existing IV indwelling needles will be attached with a safety cover to form a safe IV indwelling The needle assembly protects the used indwelling needle. The existing safety protection sheath is usually a round tubular member whose length is longer than that of the puncture component. The inner hole fits in a gap with the needle tube seat. Incision, near the opposite end of the safety cover, there is a lock groove composed of a nearly square window with a backstop structure, and a guide groove formed by an axial slit is provided between the lock groove and the wedge-shaped incision to ensure safety. One end of the protective sheath with a wedge-shaped incision is detachably connected to the three-way catheter base. The puncture needle fin on the needle tube base passes through the guide groove and is exposed outside the wall of the safety protection sleeve. When the puncture is completed, pinch the puncture needle fin After pulling along the guide channel to the lock groove, the puncture needle wings are blocked, so that the needle tube holder and the puncture needle are hidden in the inner cavity of the safety protection sleeve, that is, the puncture component accommodation cavity, so as to prevent the needle from stabbing people. However, this kind of safety protective cover is bulky and cumbersome to use.

Contents of the invention

The purpose of the utility model is to provide a convenient and compact safe intravenous transfusion indwelling needle assembly in order to overcome the deficiencies of the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: a safety intravenous infusion indwelling needle assembly, including a puncture assembly and an indwelling needle assembly, the puncture assembly includes a needle tube base and a puncture needle fixed on the front end of the needle tube base, and the indwelling The needle assembly includes a catheter base and an indwelling catheter, and is characterized in that a safety device is provided between the puncture assembly and the indwelling needle assembly, and the safety device includes a jacket and an elastic safety clip, and the jacket is provided with a The axial channel through which the needle passes, the elastic safety clip is C-shaped, and the upper and lower ends of the elastic safety clip are provided with through holes matching the clearance of the puncture needle, and the elastic safety clip is arranged on the clip In the sleeve, the upper and lower ends of the elastic safety clip are arranged radially in the axial passage, the upper end of the elastic safety clip is slidably arranged in the radial direction, and the puncture needle passes through the axial passage and the upper and lower ends of the elastic safety clip Through holes on both ends, the tube wall of the puncture needle is provided with a protrusion larger than the through hole, and the distance between the protrusion and the needle tip is smaller than the distance between the through holes on the upper and lower ends of the elastic safety clip. The upper end of the elastic safety clip is elastically deformed when the puncture needle passes through the through hole, and when the puncture needle exits the through hole at the upper end of the elastic safety clip, the upper end of the elastic safety clip is under the action of the elastic deformation The through hole is offset from the axial channel.

As a further setting of the utility model, the jacket is cylindrical, and the center is provided with an axial through hole to form the axial channel, and one side of the axial channel is provided with a C-shaped slot matching the elastic safety clip , the two ends of the C-shaped slot radially pass through the axial channel, the front end of the jacket is provided with a boss matching the inner hole of the catheter seat, the inner hole at the rear end of the jacket matches the front end of the needle tube seat, the clip The sleeve is respectively connected with the catheter base and the needle tube base through the boss at the front end and the inner hole at the rear end.

Compared with the prior art, the safety device of the utility model is arranged between the puncture assembly and the indwelling needle assembly and has a more compact structure and is more convenient to use.

Description of drawings

Accompanying drawing 1 is the three-dimensional schematic diagram of internal structure cross-section before specific embodiment of the utility model is used;

Accompanying drawing 2 is the three-dimensional schematic diagram of the decomposed internal structure after use of the specific embodiment of the utility model;

Accompanying drawing 3 is accompanying drawing 2I partial enlarged view;

Accompanying drawing 4 is the three-dimensional schematic diagram of internal structure cross-section of specific embodiment of jacket of the present invention;

Accompanying drawing 5 is the three-dimensional structural schematic diagram of the specific embodiment of the safety clip of the present invention;

Accompanying drawing 6 is the three-dimensional structural schematic diagram of the specific embodiment of the puncture assembly of the present invention.

Detailed ways

As shown in Figures 1 and 2, the indwelling needle assembly for safety intravenous infusion includes a puncture assembly, an indwelling needle assembly and a safety device, and the safety device is arranged between the puncture assembly and the indwelling needle assembly. The puncture assembly includes a needle tube base 1 and a puncture needle 2 fixed on the front end of the needle tube base 1. The indwelling needle assembly includes a catheter base 3 and an indwelling catheter 4. The indwelling catheter 4 is fixedly arranged on the front end of the catheter base 3. For convenience, the needle tube A puncture needle wing 5 is provided on the side of the seat 1, which can be one side or both sides. The safety device includes a jacket 6 and an elastic safety clip 7, the jacket 6 is cylindrical as a whole, as shown in Figure 4, the jacket 6 in this specific embodiment is cylindrical, and the jacket 6 is provided with The axial channel 601 through which the puncture needle 2 passes, specifically, an axial through hole is provided in the center to form the axial channel 601 . As shown in Figure 5, the elastic safety clip 7 is C-shaped, and the upper and lower ends of the elastic safety clip 7 are provided with a through hole 701 that fits with the puncture needle 2, and the elastic safety clip 7 is arranged on the In the jacket 6, as shown in FIG. 3, the upper and lower ends of the elastic safety clip 7 are radially arranged in the axial channel 601, and the upper end of the elastic safety clip 7 is slidably arranged in the radial direction. The puncture needle 2 passes through the axial channel 601 and the through hole 701 on the upper and lower ends of the elastic safety clip 7. The tube wall of the puncture needle 2 is provided with a protrusion 201 that is larger than the through hole 701. The distance between the protrusion 201 The distance between the needle points is less than the distance between the through holes 701 on the upper and lower ends of the elastic safety clip 7, the through hole 701 on the upper end of the elastic safety clip 7 is larger than the protrusion 201, and the through hole 701 on the lower end is smaller than the protrusion 201 , the upper end of the elastic safety clip 7 is elastically deformed when the puncture needle 2 passes through the through hole 701 thereon, and when the puncture needle 2 exits the through hole 701 at the upper end of the elastic safety clip 7, the elastic safety clip 7 The through hole 701 at the upper end deviates from the axial channel 601 under the action of the elastic deformation. In this specific embodiment, the upper and lower ends of the elastic safety clip 7 are vertically arranged with the middle connecting part, and the material is made of good elasticity such as phosphor copper sheet, and one side of the axial channel 601 in the jacket 6 is set There is a C-shaped slot 602 matched with the elastic safety clip 7, the two ends of the C-shaped slot 602 radially pass through the axial channel 601, and the middle part is also perpendicular to the two ends and arranged along the axial direction. The elastic safety clip The piece 7 is set in the jacket 6 by being embedded in the C-shaped slot 602, the through hole 701 at the lower end of the elastic safety clip 7 is opposite to the axial passage 601, and the through hole 701 at the upper end of the elastic safety clip 7 The hole 701 is closer to the middle connecting part than the through hole 701 at the lower end, so that when the upper end of the elastic safety clip 7 passes through the through hole 701 on which the puncture needle 2 passes, elastic deformation occurs, and when the puncture needle 2 exits the elastic safety clip When there is a through hole 701 at the upper end of the clip 7 , the through hole 701 at the upper end of the elastic safety clip 7 deviates from the axial passage 601 under the action of the elastic deformation. In order to facilitate assembly, the front end of the jacket 6 is preferably provided with a boss 603 that matches the inner hole of the catheter hub 3, the inner hole 604 at the rear end of the jacket 6 matches the front end of the needle hub 1, and the jacket 6 is protruded through the front end. The platform 603 and the inner hole 604 at the rear end are connected integrally with the catheter base 3 and the needle tube base 1 respectively.

Before the safety intravenous indwelling needle assembly is used, as shown in Figure 1, the jacket 6 is connected with the catheter base 3 and the needle tube base 1 respectively through the front boss 603 and the rear end inner hole 604, and the puncture needle 2 passes through the elastic The through holes 701 and the axial channel 601 on the upper and lower ends of the safety clip 7 are placed in the indwelling catheter 4. After the indwelling needle for intravenous infusion is used, the puncture needle 2 is pulled back until the puncture needle 2 is blocked due to the The protruding part 201 is stuck on the through hole 701 at the lower end of the elastic safety clip 7 and is limited, and since the distance between the protruding part 201 and the needle tip is smaller than the distance between the through holes 701 on the upper and lower ends of the elastic safety clip 7, the Under the action of the elastic deformation, the upper end of the elastic safety clip 7 deviates from the axial passage 601 to seal the upper end of the axial passage 601, and the needle tip will be restricted in the jacket 6, as shown in FIG. 2 , Thereby preventing the cross-infection caused by the needle stab wounding people, has played the role of safety protection and is very convenient to use.

Claims (2)

1. a safe intravenous infusion indwelling needle assembly, comprise piercing assembly and indwelling needle assembly, described piercing assembly comprises needle tubing seat and is fixed on the piercing needle on needle tubing seat front end, indwelling needle assembly comprises catheter block and inlying catheter, it is characterized in that: between described piercing assembly and indwelling needle assembly, be provided with safety device, described safety device comprises chuck and elastic safety intermediate plate, the axial passage passed for piercing needle is provided with in described chuck, described elastic safety intermediate plate is C font, the described upper and lower two ends of elastic safety intermediate plate are provided with the through hole with piercing needle matched in clearance, described elastic safety intermediate plate is arranged in described chuck, wherein the upper and lower two ends of elastic safety intermediate plate are arranged radially in axial passage, described elastic safety intermediate plate upper end edge radial direction is slidably arranged, described piercing needle is through the through hole on axial passage and the upper and lower two ends of elastic safety intermediate plate, the tube wall of described piercing needle is provided with the protuberance being greater than through hole, described protuberance is less than the distance between the through hole on the upper and lower two ends of elastic safety intermediate plate apart from the distance of needle point, the elastic deformation under piercing needle is through the through hole state on it of described elastic safety intermediate plate upper end, exit the through hole state of elastic safety intermediate plate upper end at piercing needle under, described axial passage is departed from described elastic deformation effect lower through-hole in described elastic safety intermediate plate upper end.

2. safe intravenous infusion indwelling needle assembly according to claim 1, it is characterized in that: described chuck is cylindric, center is provided with axially extending bore and forms described axial passage, the side of described axial passage is provided with the C font caulking groove matched with elastic safety intermediate plate, the two ends of C font caulking groove are radially across axial passage, described chuck front end is provided with the boss matched with catheter block endoporus, described chuck rear end endoporus and needle tubing seat front end match, and described chuck is connected with catheter block and needle tubing seat respectively by front end boss and rear end endoporus.