CN212214298U

CN212214298U - Integrated blood drawing and transfusion remaining needle

Info

Publication number: CN212214298U
Application number: CN202020286956.3U
Authority: CN
Inventors: 李雪莲; 伍莉; 周丽兰; 陈津
Original assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Current assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-12-25
Anticipated expiration: 2030-03-10

Abstract

The utility model discloses an integrated blood drawing transfusion remaining needle, which comprises a transfusion component and a needle head, wherein the needle head comprises a needle seat, a sleeve, a needle core, a separation plug and a Y interface; the needle base is provided with a first through hole; the sleeve is fixedly connected with one end of the needle seat; the needle core is arranged in the needle base in a penetrating way, and the head part of the needle core is inserted in the sleeve and exposes the needle tip; the blocking plug is inserted in the needle seat in a sliding manner and sleeved on the needle core, a piston rod is arranged at one end of the blocking plug, a second through hole is formed in the piston rod along the axial direction, and a third through hole is formed in the piston rod along the radial direction; the Y interface is provided with a first plugging cap, the Y interface is provided with two fourth through holes aligned with the first through holes, one of the fourth through holes is communicated with a hose of the infusion assembly, and the other one of the fourth through holes is plugged by the first plugging cap. The blood drawing channel and the transfusion channel are two independent channels by pushing and pulling the piston rod, so that liquid remained in the transfusion assembly does not need to be drawn and removed before the blood sample is collected; blood can not get into in the infusion subassembly when drawing blood, can not have blood to remain in the infusion subassembly.

Description

Integrated blood drawing and transfusion remaining needle

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to needle is kept somewhere in integral type blood drawing infusion.

Background

The venous indwelling needle is also called venous trocar, and the core component parts comprise a soft catheter/cannula which can be indwelling in the blood vessel and a stainless steel puncture guiding needle core. When in use, the catheter and the needle core are punctured into a blood vessel together, after the catheter completely enters the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel so as to carry out infusion treatment. The use of remaining needle can reduce the misery that the infant caused because of relapse venipuncture and the fear of making a needle, alleviate the headings's anxiety, the clinical medicine of being convenient for, urgent, critical patient's rescue is used medicine, alleviate nurse's work load, it is painful to reduce the infant, therefore the vein is kept somewhere the needle and is being used widely in clinic, in the face of this special colony of infant, the length of vein is kept somewhere needle and the comfort of infant becomes nurse and the headings's problem of paying attention to, also is the prerequisite of sign and popularization that the needle of keeping somewhere was used successfully.

According to the study on feasibility of collecting venous blood samples by a venous indwelling needle published in medical forum by Liu Feng Ling and Pan Ming, the venous indwelling needle can be kept in blood vessels for a long time and can be used as a transfusion channel and a blood sample collecting way, so that the superiority of the venous indwelling needle is brought into play to the maximum extent, the occurrence of local complications is avoided, and aseptic operation is strictly required in the blood sample collecting process, and pollution is prevented. Meanwhile, the needle tip cannot penetrate into the heparin cap too deeply during the extraction of the discarded liquid, and the inclined surface just penetrates into the heparin cap so as to prevent the heparin saline on the rear side of the needle tip from being pumped completely.

The existing indwelling needle is used for blood drawing, a large amount of liquid remained in the infusion assembly needs to be drawn and removed before a blood sample is collected, and a large amount of blood can also remain in the infusion assembly after the blood drawing is finished, so that the blood sample is not favorably collected.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the to-be-solved technical problem of the utility model is that the extraction is got rid of a large amount of liquid that remain in the infusion subassembly, and a large amount of blood remain in the infusion subassembly after the completion of drawing blood.

In order to solve the technical problem, the utility model discloses a technical scheme is:

needle is kept somewhere in infusion of integral type bloodletting, including infusion subassembly and syringe needle, the syringe needle includes:

the needle seat is hollow and cylindrical, and two first through holes communicated with the inner cavity of the needle seat are formed in the side wall of the needle seat at intervals along the same bus;

one end of the sleeve is fixedly connected with one end of the needle seat, and the sleeve is communicated with the inner cavity of the needle seat;

the needle core penetrates through the needle seat, the head of the needle core is inserted into the sleeve and exposes out of the needle point, and the tail of the needle core is provided with a needle wing which is positioned outside the needle seat;

the blocking plug is inserted into the needle seat in a sliding mode and sleeved on the needle core, a piston rod is arranged at one end, close to the sleeve, of the blocking plug, a second through hole is formed in the piston rod in the axial direction, a third through hole is formed in the piston rod in the radial direction, the second through hole is communicated with the third through hole, and the third through hole can be communicated with one of the first through holes; and

the Y interface is provided with a first plugging cap, the Y interface is provided with two fourth through holes aligned with the first through holes, one of the fourth through holes is communicated with a hose of the infusion assembly, and the other fourth through hole is plugged by the first plugging cap.

The sleeve and the needle core are punctured into a blood vessel together, after the catheter is communicated with the blood vessel, the needle core is withdrawn, only the soft catheter is detained in the blood vessel, and when the piston rod is pushed to move towards the direction of the sleeve to the limit, the third through hole is communicated with the first through hole far away from the sleeve, and one fourth through hole is communicated with the sleeve to form a blood drawing channel; when the piston rod moves to the direction far away from the sleeve to the limit, the third through hole is blocked, and the other fourth through hole is communicated with the sleeve to form a transfusion channel. Therefore, the blood drawing channel and the transfusion channel are two independent channels, so that liquid remaining in the transfusion component does not need to be drawn and removed before the blood sample is collected, and only a very small amount of liquid remaining in the needle head needs to be drawn and removed; blood can not get into in the infusion subassembly when drawing blood, can not have blood to remain in the infusion subassembly after drawing blood and accomplishing yet.

Furthermore, the Y interface further comprises a through hole adjusting button, two fifth through holes are arranged on the through hole adjusting button, and when any fifth through hole is aligned and communicated with one fourth through hole, the other fourth through hole is blocked. The through hole adjusting button is used for further preventing the blood drawing channel and the infusion channel from being communicated.

Furthermore, notches are formed in the two ends, located on the through hole adjusting button, of the Y interface. The two ends of the through hole adjusting button are not too protruded out of the two side faces of the Y-shaped interface due to the arrangement of the notch.

Furthermore, one end, far away from the sleeve, of the blocking plug is provided with a limiting rod, the piston rod is in sliding connection with the needle base through the limiting rod and is limited, and the limiting rod is provided with a sixth through hole coaxial with the second through hole. The sixth through hole is used for penetrating through the needle core, and the two limits of the movement of the piston rod are determined through the limiting rod, so that the piston rod is prevented from being pulled out of the needle base to cause infection.

Furthermore, a limiting block is arranged on the limiting rod, a limiting groove is arranged on the needle seat, and the limiting block is connected with the limiting groove in a sliding mode. The limiting groove is arranged on the needle base, so that the inner wall of the needle base is not provided with a protruding part, and the insertion of the piston rod and the blocking plug into the needle base is facilitated.

Further, the needle file is kept away from the sheathed tube one end is equipped with the nut, the nut with needle file threaded connection, the gag lever post passes the nut, the nut with the terminal surface butt of needle file forms a side of spacing groove. The end of the sleeve is provided with the nut, so that the inner wall of the needle seat is free from a protruding part, the piston rod and the separation plug can be inserted into the needle seat conveniently, and the nut tightly hoops the end of the needle seat, so that the end is not easy to deform.

Furthermore, a first handle is arranged on the limiting rod. The piston rod is convenient to push and pull by hand.

Further, a second handle is arranged on the needle base. The needle base is convenient to hold by hand.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the blood drawing channel and the transfusion channel are divided into two independent channels by driving the piston rod to move in the needle seat, so that liquid remained in the transfusion component does not need to be drawn and removed before a blood sample is collected; blood can not get into in the infusion subassembly when drawing blood, can not have blood to remain in the infusion subassembly after drawing blood and accomplishing yet.

2. The communication between the blood drawing channel and the transfusion channel and the outside is blocked by the through hole adjusting button, and the minimum space is kept to be communicated with the sleeve by matching with the position of the piston rod in the needle base.

3. The limit groove and the limit block are matched for use, so that the piston rod is prevented from being pulled out of the needle seat to cause infection.

4. Simple structure, small and exquisite flexibility of mechanism, the suitability is strong.

Drawings

Fig. 1 is a front view of the structure of the present invention;

FIG. 2 is a sectional view showing the connection of the needle with the needle core removed according to the present invention during infusion;

FIG. 3 is a sectional view showing the needle with the needle core removed according to the present invention communicating with the patient during blood drawing;

fig. 4 is a sectional view of the needle holder of the present invention;

figure 5 is the utility model discloses a cross-sectional view of separation stopper, piston rod and gag lever post.

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. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or structures must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present invention.

Referring to fig. 1, the integrated blood drawing and transfusion indwelling needle provided in the present embodiment includes: an infusion set 1 and a needle 2. In this embodiment, for convenience of description, one end of the needle tip of the needle 2 is front and the other end is rear.

The infusion set 1 comprises a hose 11, a liquid stop clamp 12, an infusion tee 13, a protective cap 14 and a first heparin cap 15. Wherein the one end of hose 11 is connected with syringe needle 2, and the other end of hose 11 is connected with infusion tee bend 13, is equipped with on the hose 11 and ends liquid clamp 12, and two other mouths of infusion tee bend 13 are connected with protective cap 14 and first heparin cap 15 respectively, and first heparin cap 15 is used for pricking the transfusion needle, pulls out transfusion needle back first heparin cap 15 from the sealed pinhole of going, prevents to reveal.

Referring also to fig. 2-5, the needle 2 includes a hub 21, a cannula 22, a core 23, a septum 24, and a Y-port 25.

The needle seat 21 is hollow and cylindrical, and two first through holes 211 communicated with the inner cavity of the needle seat 21 are arranged on the side wall of the needle seat 21 at intervals along the same generatrix. The front end of the needle seat 21 is conical. Specifically, the rear end of the needle base 21 is provided with a second handle 212 for facilitating the holding of the needle base 21. The rear end of the needle seat 21 can be further provided with a nut 26, the nut 26 is in threaded connection with the needle seat 21, and the nut 26 tightly hoops the end of the needle seat 21, so that the end is not easy to deform.

One end of the cannula 22 is fixedly connected with one end of the needle seat 21, and the cannula 22 is communicated with the inner cavity of the needle seat 21. Specifically, one end of the cannula 22 is fixedly connected with the front end of the needle holder 21.

The needle core 23 is arranged in the needle seat 21 in a penetrating way, the head part of the needle core 23 is inserted in the sleeve 22 and exposes the needle point, the tail part of the needle core 23 is provided with a needle wing 231, and the needle wing 231 is positioned outside the needle seat 21. Specifically, the needle wing 231 is used for holding by hand, the needle point of the needle core 23 is exposed out of the sleeve 22, after the needle point punctures the blood vessel, the needle point continues to advance into the blood vessel, the needle point penetrates into the blood vessel together with the sleeve 22, then the needle core 23 is withdrawn, and the soft sleeve 22 is left in the blood vessel.

Referring to fig. 5, the blocking plug 24 is slidably inserted into the needle holder 21 and sleeved on the needle core 23, a piston rod 27 is disposed at one end of the blocking plug 24 close to the cannula 22, the piston rod 27 is axially provided with a second through hole 27a, the piston rod 27 is radially provided with a third through hole 27b, the second through hole 27a is communicated with the third through hole 27b, and the third through hole 27b can be communicated with one of the first through holes 211.

Specifically, one end of the blocking plug 24, which is far away from the sleeve 22, is provided with a limiting rod 28, the piston rod 27 is slidably connected with the needle seat 21 through the limiting rod 28 and is limited, and the limiting rod 28 is provided with a sixth through hole 28a which is coaxial with the second through hole 27 a. The sixth through hole 28a is used to pass through the needle core 23, and the two limits of the movement of the piston rod 27 are determined by the limiting rod 28, so as to prevent the piston rod 27 from being drawn away from the needle seat 21 and causing infection. In a specific embodiment, the limiting rod 28 is provided with a limiting block 281, the needle seat 21 is provided with a limiting groove 213, and the limiting block 281 is slidably connected with the limiting groove 213. The limiting groove 213 is opened on the needle seat 21, so that the inner wall of the needle seat 21 has no protruding part, which is beneficial for the insertion of the piston rod 27 and the blocking plug 24 into the needle seat 21. The limiting rod 28 penetrates through the nut 26, and the nut 26 is abutted with the end surface of the needle seat 21 to form one side surface of the limiting groove 213. Before the nut 26 is sleeved, the piston rod 27 and the blocking plug 24 are inserted, so that no protruding part exists on the inner wall of the needle seat 21, and the piston rod 27 and the blocking plug 24 are inserted into the needle seat 21 conveniently. The stopper rod 28 is provided with a first grip 282. The first grip 282 facilitates hand-held pushing and pulling of the piston rod 27.

The Y connector 25 is provided with a first plugging cap 251, the Y connector 25 is provided with two fourth through holes 25a aligned with the first through holes 211, one fourth through hole 25a is communicated with the hose 11 of the infusion set 1, and the other fourth through hole 25a is plugged by the first plugging cap 251. Specifically, the first blocking cap 251 adopts a second heparin cap, the second heparin cap is used for pricking transfusion and blood drawing, and the second heparin cap automatically seals the needle hole after the blood drawing needle is pulled out, so that leakage is prevented. The Y interface 25 further includes a through hole adjusting button 252, and two fifth through holes 252a are provided on the through hole adjusting button 252, wherein when any one of the fifth through holes 252a is aligned with and communicated with a fourth through hole 25a, the other fourth through hole 25a is blocked. The through hole adjustment button 252 is used to further prevent the blood drawing channel and the infusion channel from communicating. Notches 253 may also be opened at both ends of the Y-interface 25 at the through-hole adjusting button 252. The notch 253 is formed so that the two ends of the through hole adjusting button 252 do not protrude from the two side surfaces of the Y-shaped connector 25 too much.

Referring to fig. 1-5, the method for using the integrated blood drawing and transfusion indwelling needle includes:

the cannula 22 and the hub 23 are inserted together into a blood vessel and, when the cannula 22 is in communication with the blood vessel and stabilized, withdrawing the needle core 23, only keeping the soft cannula 22 in the blood vessel, pulling the piston rod 27 to move backwards until the stop block 281 is blocked at the rear limit of the limit groove 213, blocking the third through hole 27b, communicating the fourth through hole 25a on the infusion channel with the cannula 22, ensuring that one of the fifth through holes 252a on the through hole adjusting button 252 on the Y interface 25 is aligned and communicated with the fourth through hole 25a on the infusion channel, then, the transfusion can be carried out in a usual way through the first heparin cap 15, after the transfusion is finished, blood anticoagulant is injected to prevent the passage from being blocked due to the blood clot caused by the blood returning, the through hole adjusting button 252 is pressed, so that the fourth through hole 25a of the transfusion channel is blocked to maintain the minimum space for communicating with the cannula 22, which is advantageous for reducing the amount of blood returning.

When blood is required to be drawn, the piston rod 27 is pushed to move forwards until the limit block 281 is clamped at the front limit of the limit groove 213, the third through hole 27b is communicated with the fourth through hole 25a on the transfusion channel, the fourth through hole 25a is communicated with the cannula 22 through the third through hole 27b and the second through hole 27a, at this time, another fifth through hole 252a on the through hole adjusting button 252 on the Y interface 25 is ensured to be aligned and communicated with the fourth through hole 25a on the blood drawing channel, then the injection needle can be inserted through the first blocking cap 251, the residual liquid in the blood drawing channel is firstly drawn out until the blood drawing channel is filled with fresh blood, then, the blood sample can be collected, after the blood drawing is finished, the blood anticoagulant is injected to prevent the blood from coagulating into a blood clot to cause the channel blockage, the through hole adjusting button 252 is pressed, so that the fourth through-hole 25a on the blood drawing path is blocked to maintain the minimum space in communication with the cannula 22.

The integrated blood drawing and transfusion retaining needle has the advantages that the blood drawing channel and the transfusion channel are two independent channels by driving the piston rod 27 to move in the needle seat 21, so that liquid remained in the transfusion component 1 does not need to be drawn and discharged before a blood sample is collected, and only a very small amount of liquid remained in the needle head 2 needs to be drawn and discharged; blood can not enter the transfusion component 1 when blood is drawn, and no blood remains in the transfusion component 1 after the blood drawing is finished; the through hole adjusting button 252 further prevents the blood drawing channel and the transfusion channel from being communicated, and further prevents residual liquid from being drawn into the transfusion assembly 1 during blood drawing; the communication between the blood drawing channel and the transfusion channel and the outside is blocked by the through hole adjusting button 252, and the minimum space is kept to be communicated with the cannula 22 by matching with the position of the piston rod 27 in the needle seat 21; the limit groove 213 and the limit block 281 are matched to prevent the piston rod 27 from being drawn away from the needle seat 21 to cause infection; simple structure, small and exquisite flexibility of mechanism, the suitability is strong.

It should be noted that the above preferred embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting 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

1. Needle is kept somewhere in integral type blood drawing infusion, including infusion subassembly and syringe needle, its characterized in that, the syringe needle includes:

2. The integrated blood drawing and transfusion retaining needle as claimed in claim 1, wherein the Y-port further comprises a through hole adjusting button, two fifth through holes are provided on the through hole adjusting button, and when any one of the fifth through holes is aligned and communicated with one of the fourth through holes, the other fourth through hole is blocked.

3. The integrated blood drawing and transfusion retaining needle as claimed in claim 2, wherein notches are formed at both ends of the Y-port located at the through-hole adjusting button.

4. The integrated blood drawing and transfusion retaining needle as claimed in claim 1, wherein a limiting rod is disposed at one end of the blocking plug away from the sleeve, the piston rod is slidably connected with the needle base through the limiting rod for limiting, and a sixth through hole coaxial with the second through hole is disposed on the limiting rod.

5. The integrated blood drawing and transfusion indwelling needle according to claim 4, wherein a limiting block is arranged on the limiting rod, a limiting groove is arranged on the needle base, and the limiting block is slidably connected with the limiting groove.

6. The integrated blood drawing and transfusion retaining needle as claimed in claim 5, wherein a nut is disposed at an end of the needle base away from the cannula, the nut is in threaded connection with the needle base, the limiting rod penetrates through the nut, and the nut abuts against an end surface of the needle base to form a side surface of the limiting groove.

7. The integrated blood drawing and transfusion retaining needle as claimed in claim 4, wherein the limiting rod is provided with a first grip.

8. The integrated blood drawing and transfusion retaining needle as claimed in claim 1, wherein the needle base is provided with a second grip.