Developing venous indwelling needle

Abstract

The utility model discloses a developing venous indwelling needle in the technical field of medical instruments, and the developing venous indwelling needle comprises a needle base, a needle tube and a catheter, the needle base is fixedly connected with the catheter, a plurality of steel wires are fixedly arranged in the catheter, the steel wires extend in the length direction of the catheter, and the steel wires are uniformly arranged in the circumferential direction of the catheter at intervals; and the steel wire is bent into a wave shape. The gaps are formed between the adjacent steel wires, the steel wires and the blood vessel cannot be completely overlapped under the ultrasonic view field, and therefore the condition of the blood vessel can be clearly observed through the gaps.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a developing vein indwelling needle. BACKGROUND

[0002] The vein indwitting needle is also called vein cannula needle or indwitting needle, is a kind of clinical infusion tool, by stainless steel needle core, soft outer sleeve and plastic needle seat, its main application is intermittent, continuous or daily intravenous infusion therapy, especially suitable for the patient needing long-term infusion, such as old and weak, infant and other blood vessel puncture more difficult crowd, and the patient needing rapid infusion, blood transfusion in rescue.

[0003] When using, the following operation steps are as follows: S1, selecting appropriate vein: according to the specific condition of patient, select appropriate vein for puncture, such as elbow vein, dorsum manus vein, dorsum pedis vein or femoral vein etc.S2, disinfection: before puncture, carry out strict disinfection treatment to local skin, to prevent infection.S3, puncture: outer sleeve and needle core are together inserted into blood vessel, when sleeve is sent into blood vessel, needle core is extracted, and only soft outer sleeve is left in blood vessel.S3, fixation: using sterile dressing to fix vein indwitting needle, to prevent it from falling off.S5, observation: after puncture, the reaction of patient and the condition of puncture site need to be closely observed.

[0004] The vein indwitting needle in prior art does not have developing function, for example, the patient who is more difficult to puncture vein cannot be guided to puncture under ultrasonic condition;When vein indwitting needle appears poor circulation, blood vessel condition also cannot be clearly observed under ultrasonic condition.Therefore, referring to prior art CN211985604U-a kind of ultrasonic special anti-folding nerve block needle, including the spiral steel wire that is arranged in catheter tube, by spiral steel wire, ultrasonic clear developing positioning can be realized, and the bending resistance of indwitting catheter can be strengthened.But because spiral steel wire shields catheter tube, spiral steel wire and blood vessel completely overlap in ultrasonic field, therefore blood vessel condition cannot be clearly observed. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide a kind of developing vein indwitting needle, to solve the problem that spiral steel wire and blood vessel completely overlap in prior art, blood vessel condition cannot be clearly observed.

[0006] To solve the above problems, the utility model provides the following technical scheme:

[0007] A kind of developing vein indwitting needle, including needle seat, needle tube and catheter, the needle seat and catheter are fixedly connected, the inside of the catheter is fixed with multiple steel wires, multiple the steel wire extends along the length direction of catheter, multiple the steel wire is evenly spaced along the circumferential direction of catheter, and the steel wire is curved into wave shape.

[0008] The working principle and beneficial effects of the utility model are as follows:

[0009] The catheter and the needle tube are punctured into the blood vessel together, and the needle tube is extracted after the catheter is sent into the blood vessel. The plurality of steel wires extend along the length direction of the catheter, and the plurality of steel wires strengthen the bending resistance of the catheter, thereby effectively avoiding the problems of obstruction and uneven flow rate caused by the folding of the catheter; meanwhile, the steel wires are bent into a wave shape, improving the developing effect under the ultrasonic condition, and the plurality of steel wires are evenly and spacedly arranged along the circumferential direction of the catheter in the scheme, so that there is a gap between the adjacent steel wires, and therefore the steel wires and the blood vessel do not completely overlap under the ultrasonic vision, so that the blood vessel condition can be clearly observed through the gap.

[0010] Optimally, the needle seat is provided with a fixing belt. The needle seat is fixed on the wrist by the fixing belt.

[0011] Optimally, the number of the steel wires is three, and the adjacent steel wires are spaced by 120 degrees in the circumferential direction. The three steel wires can achieve a better developing effect, and also make the catheter have better bending resistance.

[0012] Optimally, the steel wire extends to the needle seat. This optimization scheme can make the catheter have better bending resistance.

[0013] Optimally, the bending amplitude of the part of the steel wire away from the needle seat is greater than the bending amplitude of the part of the steel wire close to the needle seat. This optimization scheme makes the part of the catheter close to the needle seat more easily bent, thereby facilitating fixation.

[0014] Optimally, the needle seat is provided with a needle cover. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an internal structure schematic view of the developing intravenous indwelling needle in the utility model;

[0016] Figure 2 It is a vertical sectional view of the catheter in Figure 1 . DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The reference signs in the drawings of the specification include: steel wire 1, catheter 2, needle seat 3, needle tube 4.

[0019] In the following statements, the orientation words such as "left", "right", "up", "down" and the like are based on the orientation of the drawings, and if the corresponding structures are changed in the same direction based on the orientation and the relative positions remain unchanged, the implementation of the scheme is not affected.

[0020] Embodiment: a developing intravenous indwelling needle, as shown inFigure 1 As shown, including needle seat 3, needle tube 4 and catheter 2, needle seat 3 and catheter 2 are fixedly connected, the inside of catheter 2 is fixedly provided with three steel wires 1, three steel wires 1 extend to needle seat 3 along the length direction of catheter 2, as shown Figure 2 As shown, adjacent steel wires 1 are spaced 120 degrees on the circumference, and the steel wire 1 is curved into a wave shape.

[0021] In the scheme, catheter 2 and needle tube 4 are inserted into the blood vessel together, and when the catheter 2 is sent into the blood vessel, the needle tube 4 is extracted. Three steel wires 1 extend along the length direction of the catheter 2, which can strengthen the bending resistance of the catheter 2, effectively avoid the problem of blockage and uneven flow caused by the folding of the catheter 2, and the steel wire 1 is curved into a wave shape, thereby improving the development effect under the condition of ultrasonic, and meeting the effect of the prior art, in the scheme, three steel wires 1 are uniformly spaced along the circumferential direction of the catheter 2, then there is a gap between adjacent steel wires 1, so that the steel wire 1 and the blood vessel do not overlap completely under the ultrasonic field, so the blood vessel condition can be clearly observed through the gap.

[0022] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

Claims

1. A contrast-enhanced venous indwelling needle, comprising a needle hub, a needle tube, and a catheter, wherein the needle hub and the catheter are fixedly connected, characterized in that: Multiple steel wires are fixed inside the conduit. The multiple steel wires extend along the length of the conduit and are evenly spaced along the circumference of the conduit. The steel wires are bent into a wavy shape.

2. The contrast-enhanced indwelling venous catheter according to claim 1, characterized in that: The needle holder is equipped with a fixing strap.

3. The contrast-enhanced indwelling venous catheter according to claim 2, characterized in that: The number of steel wires is 3, and the adjacent steel wires are spaced 120 degrees apart in the circumferential direction.

4. The contrast-enhanced indwelling venous catheter according to claim 3, characterized in that: The steel wire extends to the needle hub.

5. The contrast-enhanced venous indwelling needle according to any one of claims 1 to 4, characterized in that: The bending amplitude of the steel wire away from the needle seat is greater than the bending amplitude of the steel wire near the needle seat.

6. The contrast-enhanced indwelling venous catheter according to claim 5, characterized in that: The needle hub is equipped with a needle cover.

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