CN210020620U

CN210020620U - Blood transfusion pipeline

Info

Publication number: CN210020620U
Application number: CN201920344970.1U
Authority: CN
Inventors: 崔景民; 鲍平; 谢雁文
Original assignee: Tibet Jun Lian Medical Science And Technology Co Ltd
Current assignee: Tibet Jun Lian Medical Science And Technology Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-02-07
Anticipated expiration: 2029-03-19

Abstract

The utility model discloses a blood transfusion pipeline, which comprises an artery loop and a vein loop; wherein the arterial loop comprises an arterial needle tool and an arterial loop catheter, the tail end of the arterial loop catheter is closely connected with a needle seat of the arterial needle tool, and the tail end of the needle seat of the arterial needle tool is inserted into a tail end opening of the arterial loop catheter; the venous loop includes a venous needle, and a venous loop catheter having a distal end closely connected to a needle hub of the venous needle, and a distal end inserted into a distal end opening of the needle hub of the venous needle. The utility model discloses it is convenient to use to can guarantee the unblocked of blood circulation, reduce the hemolytic possibility, show and reduce clinical risk.

Description

Blood transfusion pipeline

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a pipeline for blood transfusion.

Background

In hospitals, when hemodialysis is performed on a patient, the patient sometimes has symptoms such as headache, fever, chest pain and the like, and the symptoms indicate that the patient has hemolysis.

Hemolysis is the escape of hemoglobin due to rupture of red blood cells, also known as lysis of red blood cells.

Hemolysis can cause symptoms such as headache, fever, chest pain, precordial pressure, and death in severe cases. Hemolysis can also lead to anemia in patients, and in severe cases, heart failure and general edema can result.

The existing connecting structure between the arteriovenous loop and the puncture needle or the needle seat of the indwelling needle has defects. The defects are as follows:

(1) when the blood flows from the catheter to the needle seat or from the needle seat to the catheter, part of the blood meets obstruction at the opening of the needle seat to form backflow, so that the smooth circulation of the blood cannot be ensured;

(2) human blood is used as a special fluid, and when the blood impacts a needle seat opening, red blood cells are easy to break, so that hemolysis is caused after the red blood cells enter a human body.

In view of the above, there is a need in the art to design a new blood transfusion tube with a simple structure so as to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, in order to solve the problem that the existing blood transfusion tube easily causes blood backflow to cause hemolysis, the utility model provides a blood transfusion tube which can avoid blood backflow.

In order to achieve the above object, the present invention provides a blood transfusion tube, which comprises an arterial loop and a venous loop; wherein the arterial loop comprises an arterial needle tool and an arterial loop catheter, the tail end of the arterial loop catheter is closely connected with a needle seat of the arterial needle tool, and the tail end of the needle seat of the arterial needle tool is inserted into a tail end opening of the arterial loop catheter; the venous loop includes a venous needle, and a venous loop catheter having a distal end closely connected to a needle hub of the venous needle, and a distal end inserted into a distal end opening of the needle hub of the venous needle.

In another preferred embodiment, the blood line further comprises a hemodialysis device connected between the arterial circuit and the venous circuit.

In another preferred embodiment, the arterial needle is an arterial puncture needle or an arterial retention needle.

In another preferred embodiment, the intravenous needle is an intravenous puncture needle or an intravenous retention needle.

In another preferred embodiment, the inner diameter of the distal opening of the arterial circuit catheter is larger than the outer diameter of the distal end of the needle holder of the arterial needle.

In another preferred embodiment, the outer diameter of the distal end of the intravenous circuit catheter is smaller than the inner diameter of the distal opening of the hub of the intravenous needle set.

In another preferred example, the tail end of the needle seat of the artery needle tool is provided with a flared opening, and the edge of the flared opening is tightly matched with the tail end inner wall of the artery loop conduit.

In another preferred example, the inner wall of the end of the arterial loop catheter is provided with a first annular boss protruding inwards, the first annular boss comprises a top surface, an inner side surface and an outer side surface, the inner side surface and the outer side surface are both conical surfaces, and the top surface is located between the inner side surface and the outer side surface.

In another preferred embodiment, the end of the needle seat of the arterial needle tool is provided with an inverted conical matching portion, and the outer side surface of the inverted conical matching portion is tightly matched with the inner side surface of the first annular boss.

In another preferred embodiment, the end of the needle seat of the arterial needle tool is further provided with a conical protruding portion, the conical protruding portion is located below the inverted conical matching portion, and the outer side surface of the conical protruding portion is tightly matched with the outer side surface of the first annular boss.

In another preferred example, the end of the venous return conduit is provided with a conical matching part, and the end of the venous return conduit is also provided with an inverted conical protruding part which is positioned above the conical matching part.

In another preferred embodiment, the inner wall of the tail end of the needle seat of the intravenous needle tool is provided with a second annular boss protruding inwards, the second annular boss comprises a top surface, an inner side surface and an outer side surface, the inner side surface and the outer side surface are both conical surfaces, and the top surface is located between the inner side surface and the outer side surface.

In another preferred example, an outer side surface of the tapered fitting portion and an inner side surface of the second annular boss are tightly fitted.

In another preferred example, the outer side surface of the inverted conical bulge is tightly matched with the outer side surface of the second annular boss.

In another preferred embodiment, when the needle seat of the arterial needle comprises a plurality of segments arranged along the blood flow direction, the end of the former segment is nested in the latter segment.

In another preferred embodiment, when the needle seat of the intravenous needle set comprises a plurality of segments arranged along the blood flow direction, the end of the former segment is nested in the latter segment.

Technical effects

The utility model discloses can guarantee the unblocked of blood circulation, when making blood flow to human vein from human artery, the erythrocyte can not break because of the striking, has reduced hemolytic possibility, is showing and has reduced clinical risk. Moreover, the puncture needle or the indwelling needle and the loop catheter of the utility model can be connected closely, and the use is convenient.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic view of the connection structure of an arterial puncture needle and an arterial circuit catheter according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of the structure of the distal end of the arterial loop catheter according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the distal end of an arterial needle according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of the connection structure of the venipuncture needle and the venous return line catheter according to a preferred embodiment of the present invention;

fig. 5 is a schematic view of the venous return catheter tip configuration of a preferred embodiment of the present invention;

fig. 6 is a schematic view of the structure of the end of the venipuncture needle according to a preferred embodiment of the present invention;

fig. 7 is a schematic diagram of a blood transfusion tube according to a preferred embodiment of the present invention;

FIG. 8 is a schematic view of an arterial puncture needle according to a preferred embodiment of the present invention;

fig. 9 is a schematic view of a venipuncture needle in accordance with a preferred embodiment of the present invention;

FIG. 10 is a schematic view of the structure of an arterial indwelling needle according to a preferred embodiment of the present invention;

fig. 11 is a schematic structural view of a venous indwelling needle according to a preferred embodiment of the present invention.

Detailed Description

It should be noted that in the description herein, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1, 4 and 7, the present embodiment provides a blood transfusion line including an arterial circuit 1, a venous circuit 2 and a hemodialysis apparatus 3, the hemodialysis apparatus 3 being connected between the arterial circuit 1 and the venous circuit 2; wherein, the arterial circuit 1 comprises an arterial puncture needle 11 and an arterial circuit catheter 12, the end of the arterial circuit catheter 12 is closely connected with a needle seat 111 of the arterial puncture needle 11, and the end of the needle seat 111 of the arterial puncture needle 11 is inserted into the end opening of the arterial circuit catheter 12. As shown in fig. 4, the venous circuit 2 includes a venous puncture needle 21, and a venous circuit catheter 22, the end of the venous circuit catheter 22 is closely connected to a needle seat 211 of the venous puncture needle 21, and the end of the venous circuit catheter 22 is inserted into the end opening of the needle seat 211 of the venous puncture needle 21. The inner diameter of the distal end opening of the arterial circuit catheter 12 is larger than the outer diameter of the distal end of the needle holder 111 of the arterial puncture needle 11. The outer diameter of the distal end of the venous return conduit 22 is smaller than the inner diameter of the distal opening of the hub 211 of the venipuncture needle 21. The arrows in the figure indicate the direction of blood flow. The blood flows from the automatic venipuncture needle 11 to the arterial circuit line 12, passes through the hemodialysis apparatus 3, and flows from the venous circuit line 22 to the venipuncture needle 21.

As shown in fig. 1, 2 and 3, the inner wall of the distal end of the arterial loop catheter 12 has a first annular projection 121 protruding inward, the first annular projection 121 includes a top surface 1211, an inner side surface 1212 and an outer side surface 1213, the inner side surface 1212 and the outer side surface 1213 are both conical surfaces, and the top surface 1211 is located between the inner side surface 1212 and the outer side surface 1213. The artery pjncture needle 11 the end of needle file 111 is equipped with back taper cooperation portion 1111, back taper cooperation portion 1111 is the horn type, the lateral surface of back taper cooperation portion 1111 with the medial surface 1212 of first annular boss 121 closely cooperates. As shown in fig. 3, the distal end of the needle seat 111 of the arteriopuncture needle 11 is further provided with a conical protrusion 1112, the conical protrusion 1112 is located below the inverted conical fitting portion 1111, and the outer side surface of the conical protrusion 1112 is tightly fitted with the outer side surface 1213 of the first annular boss 121.

As shown in fig. 8, the arterial needle 11 comprises the segments: a needle base 111, a needle tube 112 and a butterfly wing needle handle 113, wherein, the inner diameter of the needle tube 112 is smaller than that of the needle base 111, and the end of the needle tube 112 of the artery puncture needle 11 is sleeved in the needle base 111. At the same time, as described above, the tip of the needle hub 111 is inserted into the tip opening of the arterial circuit catheter 12.

As shown in fig. 4, 5, and 6, the end of the venous return conduit 22 is provided with a tapered fitting portion 221, the tapered fitting portion 221 is in a horn shape, the end of the venous return conduit 22 is further provided with an inverted conical protruding portion 222, and the inverted conical protruding portion 222 is located above the tapered fitting portion 221. The inner wall of the tail end of the needle seat 211 of the intravenous puncture needle 21 is provided with a second annular boss 2111 protruding inwards, the second annular boss 2111 comprises a top surface 21111, an inner side surface 21112 and an outer side surface 21113, the inner side surface 21112 and the outer side surface 21113 are both conical surfaces, and the top surface 21111 is positioned between the inner side surface 21112 and the outer side surface 21113. The outer side surface of the tapered mating portion 221 mates with the inner side surface 21112 of the second annular boss 2111. The outer side surface of the reverse tapered protrusion 222 is tightly fitted with the outer side surface 21113 of the second annular boss 2111.

As shown in fig. 9, the venipuncture needle 21 comprises the segments: a needle hub 211, a needle cannula 212, and a butterfly handle 213, wherein the distal end of the venous return conduit 22 is inserted into the distal opening of the needle hub 211 of the venipuncture needle 21.

In this embodiment, the inner diameter of the arterial loop catheter is 4mm to 12 mm. The outer diameter of the tail end of the needle seat of the artery puncture needle is 4 mm-12 mm. The outer diameter of the tail end of the venous return conduit is 4 mm-12 mm. The inner diameter of the tail end opening of the needle seat of the vein puncture needle is 4 mm-12 mm.

Taking the connection structure of the arterial puncture needle 11 and the arterial loop catheter 12 as an example, in this embodiment, the first annular boss 121 protruding inwards is arranged on the inner wall of the end of the arterial loop catheter 12, so that the connection between the arterial puncture needle 11 and the arterial loop catheter 12 is very convenient and firm. By arranging the horn-shaped inverted cone-shaped matching part 1111 at the tail end of the needle seat 111 of the arterial puncture needle 11, when blood flows from the arterial circuit catheter 12 to the needle seat 111 of the arterial puncture needle 11, red blood cells cannot be broken due to impact, so that the possibility of hemolysis is reduced, and the clinical risk is remarkably reduced.

Example 2

As shown in fig. 10 and 11, the basic structure of the blood transfusion line provided in this embodiment is the same as that of embodiment 1, that is, the blood transfusion line includes an arterial circuit and a venous circuit, and is different in that the arterial circuit includes an arterial retention needle 41 and an arterial circuit catheter, the end of the arterial circuit catheter is closely connected to a hub 411 of the arterial retention needle 41, and the end of the hub 411 of the arterial retention needle 41 is inserted into an end opening of the arterial circuit catheter. The venous circuit comprises a venous retention needle 51 and a venous circuit catheter, the end of which is tightly connected to a needle seat 511 of the venous retention needle 51 and which is inserted into a distal opening of the needle seat 511 of the venous retention needle 51.

As shown in fig. 10, the arterial retention needle 41 includes a needle tube 412 and a needle hub 411, the needle tube 412 includes a core 4121 and a tube 4122, the needle hub 411 includes a plurality of segments: the tube base 4111, the intermediate hose 4112, and the luer joint tube 4113, wherein the end of the former section is inserted into the latter section, that is, the tube base 4111 and the intermediate hose 4112 are connected in such a manner that the tube base 4111 is inserted into the intermediate hose 4112, and the intermediate hose 4112 and the luer joint tube 4113 are connected in such a manner that the intermediate hose 4112 is inserted into the luer joint tube 4113. As shown in fig. 10, the arterial retention needle 41 further includes a hub seat 6 and a luer cap 7. As used herein, "anterior" refers to the location through which blood flow first passes and "posterior" refers to the location through which blood flow passes after.

As shown in fig. 11, the venous indwelling needle 51 comprises a needle tube 512 and a needle hub 511, the needle tube 512 comprises a core 5121 and a catheter 5122, and the needle hub 511 comprises a plurality of sections: the catheter holder 5111, the intermediate hose 5112 and the luer tube 5113 are sleeved in the latter section, that is, the catheter holder 5111 and the intermediate hose 5112 are connected in such a way that the intermediate hose 5112 is inserted into the catheter holder 5111, and the intermediate hose 5112 and the luer tube 5113 are connected in such a way that the luer tube 5113 is inserted into the intermediate hose 5112. As shown in fig. 11, the venous indwelling needle 51 further includes a hub 8 and a luer cap 8.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A line for blood transfusion, characterized in that it comprises an arterial circuit, and a venous circuit; wherein the arterial loop comprises an arterial needle tool and an arterial loop catheter, the tail end of the arterial loop catheter is closely connected with a needle seat of the arterial needle tool, and the tail end of the needle seat of the arterial needle tool is inserted into a tail end opening of the arterial loop catheter; the venous loop includes a venous needle, and a venous loop catheter having a distal end closely connected to a needle hub of the venous needle, and a distal end inserted into a distal end opening of the needle hub of the venous needle.

2. A blood transfusion line according to claim 1, further comprising a hemodialysis device connected between said arterial circuit and said venous circuit.

3. The blood transfusion line of claim 2, wherein the arterial needle is an arterial puncture needle or an arterial indwelling needle; the vein needle is a vein puncture needle or a vein indwelling needle.

4. A blood transfusion tube according to claim 3, wherein the tip of said needle holder of said arterial puncture needle is provided with a flared opening, the edge of said flared opening being in close fit with the inner wall of the tip of said arterial circuit catheter.

5. The blood transfusion tube according to claim 4, wherein the inner wall of the distal end of the arterial circuit tube has a first annular projection projecting inwardly, the first annular projection including a top surface, an inner side surface and an outer side surface, the inner side surface and the outer side surface being tapered, the top surface being located between the inner side surface and the outer side surface.

6. The blood transfusion tube according to claim 5, wherein the end of the needle holder of the arterial puncture needle is provided with an inverted conical fitting portion, and the outer side surface of the inverted conical fitting portion is tightly fitted with the inner side surface of the first annular boss; and the number of the first and second electrodes,

the tail end of the needle seat of the artery puncture needle is further provided with a conical protruding portion, the conical protruding portion is located below the inverted conical matching portion, and the outer side face of the conical protruding portion is tightly matched with the outer side face of the first annular boss.

7. The blood transfusion line according to claim 6, wherein the end of the venous circuit conduit is provided with a tapered fitting portion, and the end of the venous circuit conduit is further provided with an inverted conical projection portion which is located above the tapered fitting portion.

8. The blood transfusion tube according to claim 7, wherein the inner wall of the distal end of the hub of the venipuncture needle has a second annular projection projecting inwardly, the second annular projection including a top surface, an inner side surface and an outer side surface, the inner side surface and the outer side surface being tapered surfaces, the top surface being located between the inner side surface and the outer side surface.

9. The blood transfusion line of claim 8, wherein an outer side surface of the tapered fitting portion and an inner side surface of the second annular projection are closely fitted.

10. The blood transfusion line according to claim 1, wherein when the needle holder of the arterial needle includes a plurality of segments arranged in the blood flow direction, the tip of the former segment is fitted into the latter segment; when the needle seat of the intravenous needle tool comprises a plurality of sections arranged along the blood flow direction, the tail end of the former section is sleeved and embedded in the latter section.