CN213076950U - Blood vessel remaining needle - Google Patents

Abstract

The utility model discloses a needle is kept somewhere to blood vessel, including nook closing member and pipe, the feed liquor of pipe is served the intercommunication and is had the installation pipe, the internal seal of installation pipe is provided with keeps apart the stopper, the tail-end fixation of nook closing member is in a needle file, an organic whole is provided with holds the needle handle on the needle file, the nook closing member is close to the annular groove that is provided with multichannel evenly distributed on most advanced position, the most advanced of nook closing member center of following of nook closing member penetrates, wear out in the pipe after passing the installation pipe, the needle file card is in the installation pipe, the installation pipe intercommunication has the branch pipe that is used for advancing the medicine on keeping apart the lateral wall between stopper and the pipe, be provided with the check valve to the intraductal. The utility model discloses be provided with multichannel evenly distributed's cyclic annular groove on the position that the nook closing member is close to most advanced, at the in-process of puncture, cooperation supersound image display equipment can be so that the most advanced position of nook closing member develops more clearly on the display screen, is provided with the check valve in the branch pipe, can prevent in blood refluence advances the pipe.

Description

Blood vessel remaining needle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to blood vessel indwelling needle.

Background

The blood vessel remaining needle consists of stainless steel needle core, soft catheter and plastic needle seat. An infusion device for performing infusion by piercing a catheter and a stylet into a blood vessel and withdrawing the stylet after the cannula is introduced into the blood vessel, and leaving only the flexible catheter in the blood vessel. In medicine, a vascular indwelling needle may be used to infuse fluid into a patient's veins and blood vessels.

The artery blood vessel is generally positioned at a deeper position of the skin of a human body, and when a doctor penetrates a blood vessel indwelling needle into the blood vessel for transfusion, the accurate positioning of the blood vessel and the puncture position of the blood vessel indwelling needle is not realized, so that the clinical operation is difficult, and the deviation is easily generated between the needle point of the needle core and the blood vessel. Moreover, because some patients are fat in physique, the vein vessel can be positioned at the position with deeper skin, and medical workers are difficult to accurately position when performing venipuncture on the patients with fat physique, so that the operation is inconvenient.

The existing closed type blood vessel remaining needle is generally connected with a positive pressure joint, when the transfusion device/injector is separated from the positive pressure joint after the transfusion is finished, the positive pressure joint generates instant positive pressure to push the liquid in the catheter forward, so that the lumen of the catheter is filled with the liquid. However, blood backflow within the catheter lumen depends on factors such as catheter lumen size, vein thickness, venous blood pressure, and changes in chest pressure due to coughing, vomiting, or sneezing.

The positive pressure connector can only generate disposable instantaneous positive pressure when the infusion set or the injector is disconnected, is used for preventing blood from flowing back into the catheter, and is not used for preventing blood from flowing back by permanent continuous positive pressure. Therefore, there is a possibility that blood in the blood vessel flows back into the catheter and forms thrombus after standing, which may block the catheter and affect the next transfusion.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a needle is kept somewhere to blood vessel improves the vascular puncture accuracy to can prevent that the blood in the blood vessel from flowing back in a large number to causing the pipe to block up in the pipe.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

the utility model provides a needle is kept somewhere to blood vessel, includes nook closing member and pipe, the feed liquor of pipe is served and is linked up the intercommunication and have the installation pipe, the internal seal of installation pipe is provided with keeps apart the stopper, the tail-end fixation of nook closing member is in a needle file, an organic whole is provided with holds the needle handle on the needle file, the nook closing member is close to and is provided with multichannel evenly distributed's annular groove on the most advanced position, the most advanced of nook closing member is followed keep apart the stopper center and penetrate, pass follow behind the installation pipe wear out in the pipe, the needle file card is in the installation pipe, the installation pipe in the intercommunication has the branch pipe that is used for advancing the medicine on the lateral wall between isolation stopper and the pipe, be provided with the check valve to one-way conduction in.

Further, the check valve includes the valve body and installs flow stopping ball in the valve body, the valve body with the branch pipe sets up with one heart, valve body and branch pipe inner wall an organic whole set up, flow stopping chamber has been seted up in the valve body, flow stopping chamber is the round platform form, the opening that flow stopping chamber is close to the one end of installation pipe is greater than the opening of the one end of keeping away from the installation pipe, flow stopping ball's diameter size is greater than flow stopping chamber keeps away from the open-ended diameter size of installation pipe one end, is located concentric, be the circumference array distribution on the branch pipe inner wall between valve body and the installation pipe have a plurality of spacing archs, flow stopping ball is located between spacing arch and the valve body.

Further, the flow stopping ball is a plastic ball, and the mass of water drained by the flow stopping ball is the same as the mass of the water.

Further, the needle point of the needle core is provided with an inclined plane, and the inclined angle of the inclined plane is 30 degrees.

Further, the diameter of the stylet is the same size as the inner diameter of the catheter.

The beneficial effects of the utility model are embodied in:

the utility model is provided with a plurality of evenly distributed annular grooves at the position of the stylet close to the tip, and in the process of puncture, the position of the stylet tip can be more clearly developed on the display screen by cooperating with the ultrasonic imaging equipment, so that doctors can more accurately position the position between the blood vessel and the stylet tip, thereby avoiding the deviation between the needle point of the stylet and the blood vessel in the process of puncture and facilitating the precise puncture of the doctors; be provided with the check valve to one-way conduction in the installation pipe in the branch pipe, because be connected with the malleation on the extension pipe and connect, so pipe, installation pipe and branch pipe are inside all to be full of by the liquid medicine, if blood backward flow when flowing in the pipe, the liquid medicine can reverse flow to in time drive and stop the ball and plug up the valve body, prevent that the distance that blood flowed in the pipe is longer, avoid causing the pipe to block behind the stillness.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of a vascular indwelling needle according to the present invention;

fig. 2 is a schematic structural view of the check valve in the blood vessel indwelling needle of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1-2, the utility model discloses a blood vessel indwelling needle, including nook closing member 1 and pipe 2, the feed liquor of pipe 2 is served and is fed through installation pipe 3, the internal seal of installation pipe 3 is provided with isolating plug 4, the tail end of nook closing member 1 is fixed in a needle file 5, an organic whole is provided with on needle file 5 and holds needle handle 6, be provided with multichannel evenly distributed's annular groove 7 on the position that nook closing member 1 is close to most advanced, the most advanced of nook closing member 1 is followed isolating plug 4 center penetrates, passes follow behind the installation pipe 3 wear out in the pipe 2, the diameter of nook closing member 1 with the internal diameter size of pipe 2 is the same. Needle file 5 card is in installation pipe 3, installation pipe 3 in intercommunication has the branch pipe 8 that is used for advancing the medicine on the lateral wall between isolation stopper 4 and the pipe 2, be provided with in the branch pipe 8 to the one-way check valve 9 that switches on in the installation pipe 3, there is malleation joint 10 through the extension union coupling on the branch pipe 8. The needle point of the needle core 1 is provided with an inclined plane, the inclined plane has an inclination angle of 30 degrees, and the puncture of a doctor is facilitated. After the doctor pierces the needle core 1 and the catheter 2 into the blood vessel, the doctor can press the mounting tube 3 with one hand and hold the needle handle 6 with the other hand, so that the needle core 1 can be pulled out from the catheter 2, and the soft catheter 2 is left in the blood vessel.

Be provided with multichannel evenly distributed's annular groove 7 on the position that nook closing member 1 is close to most advanced, at the in-process of puncture, cooperation supersound image display equipment can make 1 most advanced position of nook closing member develop more clearly on the display screen, makes things convenient for the more accurate location position between blood vessel and the nook closing member 1 of doctor to avoid producing the deviation between the needle point of the nook closing member 1 of puncture in-process and the blood vessel, make things convenient for the accurate puncture of doctor. Be provided with in branch pipe 8 to the one-way valve 9 that one-way switched on in installation pipe 3, owing to be connected with the malleation on the extension pipe and connect 10, so pipe 2, installation pipe 3 and branch pipe 8 are inside all to be full of by the liquid medicine, if blood backward flow when flowing in pipe 2, the liquid medicine can reverse flow, and check valve 9 ends to prevent that the distance in the blood inflow pipe 2 is longer, avoid causing pipe 2 to block after the stillness.

Specifically, as shown in fig. 2, the check valve 9 includes a valve body 91 and a flow stopping ball 92 installed in the valve body 91, the valve body 91 and the branch pipe 8 are concentrically arranged, the valve body 91 and the inner wall of the branch pipe 8 are integrally arranged, a flow stopping cavity is formed in the valve body 91, the flow stopping cavity is in a circular truncated cone shape, an opening at one end of the flow stopping cavity close to the installation pipe 3 is larger than an opening at one end of the installation pipe 3, the diameter of the flow stopping ball 92 is larger than the diameter of an opening at one end of the flow stopping cavity far away from the installation pipe 3, the flow stopping ball is located on the inner wall of the branch pipe 8 between the valve body 91 and the installation pipe 3, a plurality of limiting protrusions 93 are concentrically arranged in a circumferential array manner and distributed on the inner wall, and the limiting protrusions 92 are located between the limiting protrusions 93 and the valve body 91, and the limiting protrusions 93 are. The flow stopping ball 92 is made of a plastic ball and made of medical plastic materials, the quality of water drained by the flow stopping ball 92 is the same as the quality of the water, and when blood flows back into the catheter 2, the water is pushed by liquid medicine to block the valve body 91. After the blood flows back into the catheter 2, the residual liquid medicine in the catheter, the mounting tube and the branch tube can push the flow stopping ball 92 to be attached to the inner wall of the valve body 91, so that the flow blocking cavity in the valve body 91 is blocked, and the blood is prevented from further flowing backwards into the catheter 2. When the liquid medicine flows into the branch pipe 8 from the positive pressure joint 10 through the extension pipe, the flow stopping ball 92 is separated from the inner wall of the valve body 91, but is limited between the limiting protrusion 93 and the valve body 91, so that the liquid medicine can normally flow in.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (5)

1. A blood vessel remaining needle is characterized in that: including nook closing member (1) and pipe (2), the feed liquor of pipe (2) is served and is fed through installation pipe (3), the internal seal of installation pipe (3) is provided with isolation stopper (4), the tail end of nook closing member (1) is fixed in a needle file (5), an organic whole is provided with on needle file (5) and holds needle handle (6), be provided with multichannel evenly distributed's annular groove (7) on nook closing member's the position of nook closing member (1), the pointed end of nook closing member (1) is followed isolation stopper (4) center penetrates, passes behind installation pipe (3) follow wear out in pipe (2), needle file (5) card is in installation pipe (3), installation pipe (3) in on keeping apart the lateral wall between stopper (4) and pipe (2) intercommunication have branch pipe (8) that are used for advancing the medicine, be provided with in branch pipe (8) to unidirectional check valve (9) that switch on in installation pipe (3), the branch pipe (8) is connected with a positive pressure joint (10) through an extension pipe.

2. The vascular indwelling needle according to claim 1, wherein: check valve (9) include valve body (91) and install only flow ball (92) in valve body (91), valve body (91) with branch pipe (8) set up with one heart, valve body (91) and branch pipe (8) inner wall an organic whole set up, set up in valve body (91) and hinder the flow chamber, it is round platform form to hinder the flow chamber, the opening that hinders the one end that the flow chamber is close to installation pipe (3) is greater than the opening of keeping away from the one end of installation pipe (3), the diameter size that ends flow ball (92) is greater than hinder the flow chamber and keep away from the diameter size of the opening of installation pipe (3) one end, be located concentric on branch pipe (8) inner wall between valve body (91) and installation pipe (3), be the circumference array distribution and have a plurality of spacing archs (93), it is located to end ball (92) between spacing arch (93) and valve body (91).

3. The vascular indwelling needle according to claim 2, wherein: the flow stopping ball (92) is a plastic ball, and the mass of water drained by the flow stopping ball (92) is the same as the mass of the water.

4. The vascular indwelling needle according to claim 1, wherein: the needle point of the needle core (1) is provided with an inclined plane, and the inclination angle of the inclined plane is 30 degrees.

5. The vascular indwelling needle according to claim 1, wherein: the diameter of the needle core (1) is the same as the inner diameter of the catheter (2).

Images