Sodium citrate prefilled anticoagulant syringe and method of use

Abstract

The present invention discloses a sodium citrate prefilled anticoagulant syringe and a method for use, relating to the technical field of medical supplies. The syringe comprises a syringe and a push rod. The syringe is provided with a saline solution and a sealing capsule. The sealing capsule is located adjacent to the push rod and is filled with sodium citrate sealing solution. A needle is provided at the top of the syringe. A peripheral channel is provided on one side of the needle, and the peripheral channel is connected to the injection head. The sodium citrate prefilled anticoagulant syringe provided by the present invention has a simple structure, is easy to assemble, and has a low production cost. It solves the problem of the cumbersome flushing and sealing operations of traditional methods using multiple syringes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical supplies, in particular to a sodium citrate pre-filled anticoagulant syringe. BACKGROUND

[0002] Central venous catheters are widely used in intravenous therapy, fluid replacement and hemodialysis, etc. If the nursing is not proper, it will lead to catheter-related bloodstream infections, catheter blockage and other complications, among which catheter blockage is the most common. Once it occurs, it needs to dissolve thrombus in the catheter, pull out the catheter or re-catheterize. Not only will it cause treatment interruption, increase patient hospitalization time and medical expenses, but also will affect patient prognosis and even increase mortality. In the routine operation of the clinic, sealing the catheter for the central venous indwelling catheter is the key link to prolong its use time and reduce complications. The pre-filled syringe is a commonly used medical device, which generally includes a sleeve, a piston, a cap and a push rod. The piston and the push rod are connected together and installed in the sleeve. By pushing the push rod, the piston pushes the solution pre-filled in the sleeve out of the syringe. The pre-filled syringe is suitable for use in the interval of different drug treatments for sealing the indwelling catheter or the indwelling needle.

[0003] During the retention of the vascular indwelling tube, flushing and sealing are needed after each infusion or medication to avoid blood backflow and thrombus formation leading to vascular indwelling tube blockage. Sodium citrate is used as a sealing liquid for CVC sealing. Sodium citrate liquid is widely used as a sealing liquid for indwelling catheters or indwelling needles. It can prevent thrombus formation and infection.

[0004] Therefore, the present application provides a sodium citrate pre-filled anticoagulant syringe, which solves the problem of complicated flushing and sealing operation by multiple syringes in the prior art. SUMMARY

[0005] The present application aims at solving the defects in the prior art and provides a sodium citrate pre-filled anticoagulant syringe.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A sodium citrate pre-filled anticoagulant syringe, comprising a syringe tube and a push rod, a saline solution and a sealing capsule are arranged in the syringe tube, the sealing capsule is arranged near the push rod, the sealing capsule is filled with a sodium citrate sealing liquid, a stab needle is arranged at the top of the inside of the syringe tube, an outer peripheral channel is arranged on one side of the stab needle, and the outer peripheral channel is in communication with the injection head.

[0008] Further, the stab needles are arranged in a ring array with the injection head as the center, the outer peripheral channels are arranged correspondingly to the stab needles and are located on the side away from the injection head.

[0009] Further, the push rod is a two-section structure, comprising a push rod outer frame section and a push rod telescopic section, a sliding cavity is arranged in the push rod outer frame section, the push rod telescopic section is slidably connected in the sliding cavity, a plurality of limiting holes are formed on the sliding cavity, the push rod telescopic section is provided with a second limiting wedge, and the second limiting wedge is unidirectionally slidably connected in the limiting hole; the push rod outer frame section is provided with a first limiting wedge, the first limiting wedge is unidirectionally slidably connected on the limiting cover, and the limiting cover is arranged at the end of the injection tube.

[0010] Further, the push rod outer frame section and the push rod telescopic section are both in a cross section, a through hole in a cross section is formed on the limiting cover, the through hole is matched with the outer contour of the push rod outer frame section, and the first limiting wedge is used for limiting the sliding state of the push rod outer frame section in the through hole.

[0011] Further, the limiting cover is further provided with a reset hole, the reset hole is an arc-shaped hole, is located on one side of the through hole, and corresponds to the first limiting wedge.

[0012] Further, the push rod telescopic section is fixedly connected with a locking frame at the end, the locking frame is the same in structure as the push rod outer frame section, and a third limiting wedge is fixedly connected to the outer wall of the locking frame.

[0013] Further, the second limiting wedge is provided with two groups, the interval of the two groups of limiting wedges is the same as the interval of the two limiting holes, the first limiting wedge is provided with 2-4 groups, and the interval of adjacent first limiting wedges is 3-5 mm.

[0014] Further, a groove is formed on the piston at the end of the push rod, the volume of the groove is greater than that of the lancet, and the groove corresponds to the lancet.

[0015] A use method of a sodium citrate pre-filled anticoagulant injector, which utilizes the above-mentioned sodium citrate pre-filled anticoagulant injector and comprises the following steps:

[0016] S1: the end of the push rod telescopic end is pressed downward to press the push rod to slowly push out the liquid;

[0017] S2: after the first limiting wedge reaches the other side of the limiting cover, the pushing is stopped, and the push rod telescopic section is pulled out;

[0018] S3: the second limiting wedge on the push rod telescopic section is pulled into the outermost limiting hole, and the straight surface of the second limiting wedge is abutted against the inner wall of the limiting hole;

[0019] S4: finally, the push rod telescopic section is pushed to perform a subsequent liquid pushing action.

[0020] Beneficial effects

[0021] Compared with the prior art, the beneficial effects of the present application are that:

[0022] The present application has simple structure, is easy to assemble, has low production cost, and the needle barrel of the syringe body is provided with a lancet, one end of the lancet is a sharp end for piercing the sodium citrate sealing capsule, and the other end is an open end structure, the open end of the lancet is fixedly connected with the inner wall of the injection tube, the liquid in the sealing capsule can be smoothly discharged from the needle tube to the outside through the injection head or the peripheral channel by setting the peripheral channel around the lancet and matching the structure of the injection head, the material of the sodium citrate sealing capsule is medical rubber with shrinkage elasticity, that is, the sodium citrate sealing capsule can quickly shrink and discharge sodium citrate at the moment of being pierced by the lancet, and the operation is simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, and do not constitute a limitation of the present application.

[0024] Figure 1 It is an internal structure diagram of the syringe.

[0025] Figure 2 It is a structure diagram of the push rod.

[0026] Figure 3 It is a structure diagram of the limiting cover.

[0027] Figure 4 It is an enlarged structure diagram of part A.

[0028] Figure 5 It is an enlarged structure diagram of part B.

[0029] In the figure: 1, injection tube; 2, sealing capsule; 3, push rod outer frame section; 4, first limiting wedge; 5, push rod telescopic section; 6, locking frame; 7, limiting cover; 8, peripheral channel; 9, lancet; 10, second limiting wedge. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application are within the scope of protection of the present application.

[0031] In the description of the application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0033] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] In addition, in the description of the application, the terms used should be broadly understood, and those skilled in the art can understand the specific meaning of the terms according to the actual specific circumstances. For example, the term "installation" used in this application can be defined as detachable fixed installation or non-detachable fixed installation, etc.; the terms "set" and "provided with" used can be defined as contact setting or non-contact setting, etc.; the terms "connection" and "connection" used can be defined as fixed connection or movable connection, etc.; the term "matching" used can be defined as the same or similar in shape or size, etc.; the orientation terms used are defined according to the actual situation and common knowledge with reference to the drawings.

[0035] Referring to Figure 1 - Figure 5The application discloses a pre-filled sodium citrate anticoagulant injector, which comprises an injection tube 1 and a push rod, a sealed capsule 2 filled with a saline solution is arranged in the injection tube 1, the sealed capsule 2 is arranged close to the push rod, the sealed capsule 2 is filled with a sodium citrate sealing liquid, a puncture needle 9 is arranged at the top of the injection tube 1, one side of the puncture needle 9 is provided with a peripheral channel 8, and the peripheral channel 8 is communicated with an injection head.

[0036] The application has the advantages of simple structure, easy assembly, low production cost, the puncture needle 9 is arranged in the needle cylinder of the injector body, one end of the puncture needle 9 is a sharp end for puncturing the sodium citrate sealed capsule 2, the other end is an open structure, the open end of the puncture needle 9 is fixedly connected with the inner wall of the injection tube, the peripheral channel 8 is arranged around the puncture needle 9, and the structure of the injection head is matched, so that the liquid in the sealed capsule 2 can be smoothly discharged from the needle tube to the outside through the injection head or the peripheral channel 8, the material of the sodium citrate sealed capsule 2 is medical rubber with shrinkage elasticity, that is, the sodium citrate sealed capsule 2 can rapidly shrink and discharge the sodium citrate at the moment when the sodium citrate sealed capsule 2 is punctured by the puncture needle 9, and the operation is simple and efficient.

[0037] In other preferred embodiments, the puncture needle 9 is in a plurality of groups and is arranged in a ring array with the injection head as the center, the peripheral channel 8 is arranged correspondingly with the puncture needle 9 and is located on the side, away from the injection head, of the puncture needle 9. By arranging the peripheral channel 8 on the periphery of the puncture needle 9, the puncture needle 9 can be used to fix the sealed capsule 2, and a double-way liquid discharging mode of the injection head and the peripheral channel 8 is formed, so as to reduce the influence of the blockage of the sealed capsule 2 on the liquid discharging.

[0038] In other preferred embodiments, the push rod is in a two-section structure and comprises a push rod outer frame section 3 and a push rod telescopic section 5, the push rod outer frame section 3 is provided with a sliding cavity, the push rod telescopic section 5 is slidably connected in the sliding cavity, a plurality of limiting holes are formed in the sliding cavity, the push rod telescopic section 5 is provided with a second limiting wedge 10, and the second limiting wedge 10 is unidirectionally and slidably connected in the limiting hole; the push rod outer frame section 3 is provided with a first limiting wedge 4, the first limiting wedge 4 is unidirectionally and slidably connected on a limiting cover 7, and the limiting cover 7 is arranged at the end of the injection tube 1.

[0039] The structure of the push rod being the push rod outer frame section 3 and the push rod telescopic section 5 can guarantee the stability of the initial liquid pushing, in use, the push rod telescopic section 5 is embedded in the push rod outer frame, the second limiting wedge 10 is located in the limiting hole, the operator presses the end of the push rod telescopic section downwards to push the liquid outwards, after the first limiting wedge 4 reaches the other side of the limiting cover 7, the operator pulls out the push rod telescopic section 5, during the pulling-out process, the straight surface of the first limiting wedge 4 is clamped on the end surface of the limiting cover 7, so that the push rod outer frame section 3 cannot move, the second limiting wedge 10 on the push rod telescopic section 5 is pulled to the limiting hole at the outermost side, the straight surface of the second limiting wedge 10 abuts against the inner wall of the limiting hole, and then the liquid pushing operation can be performed.

[0040] Specifically, the push rod outer frame segment 3 and the push rod telescopic segment 5 are both in cross shape in cross section, the limiting cover 7 is provided with a through hole in cross shape, the through hole is matched with the outer contour of the push rod outer frame segment 3, and the first limiting wedge 4 is used for limiting the sliding state of the push rod outer frame segment 3 in the through hole.

[0041] The limiting cover 7 is further provided with a reset hole, the reset hole is an arc-shaped hole, is located on one side of the through hole, and corresponds to the first limiting wedge 4. Through the reset hole, the first limiting wedge 4 can pass through the limiting cover 7 more smoothly.

[0042] In other preferred embodiments, the end of the push rod telescopic segment 5 is fixedly connected with a locking frame 6, the locking frame 6 is the same in structure as the push rod outer frame segment 3, and the outer wall of the locking frame 6 is fixedly connected with a third limiting wedge. Through the locking frame 6 and the third limiting wedge, it can be ensured that, after the end of the push rod abuts against the end wall of the syringe 1, the straight surface of the third limiting wedge can abut against the end surface of the limiting cover 7, so that the push rod is prevented from rebounding outward.

[0043] Specifically, the second limiting wedge 10 is provided with two groups, the interval of the two groups of limiting wedges is the same as the interval of the two limiting holes, the first limiting wedge 4 is provided with 2-4 groups, and the interval of adjacent first limiting wedges 4 is 3-5 mm.

[0044] In other preferred embodiments, a groove is formed in the piston at the end of the push rod, the volume of the groove is greater than the volume of the lancet 9, and the groove corresponds to the lancet 9. Through the structure, it can be ensured that the piston head that penetrates is provided with a groove corresponding to the insertion of the lancet 9 at one end close to the lancet 9, that is, the piston of the syringe body can abut against the needle barrel of the syringe body close to the end of the needle head, so that the saline solution and sodium citrate can be completely squeezed out.

[0045] A use method of the sodium citrate pre-filled anticoagulant syringe, which utilizes the sodium citrate pre-filled anticoagulant syringe and comprises the following steps:

[0046] S1: press the end of the push rod telescopic end downward to press the push rod to slowly push out the liquid;

[0047] S2: after the first limiting wedge reaches the other side of the limiting cover, stop pushing and pull out the push rod telescopic segment outward;

[0048] S3: pull the second limiting wedge on the push rod telescopic segment into the outermost limiting hole, and make the straight surface of the second limiting wedge abut against the inner wall of the limiting hole;

[0049] S4: finally, push the push rod telescopic segment to perform the subsequent liquid pushing action.

[0050] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A sodium citrate prefilled anticoagulant syringe, characterized in that: The syringe comprises an injection tube and a push rod. The injection tube is provided with a saline solution and a sealing capsule. The sealing capsule is provided adjacent to the push rod and is filled with sodium citrate sealing solution. A puncture needle is provided at the top of the injection tube. A peripheral channel is provided on one side of the puncture needle. The peripheral channel is connected to the injection head. The push rod is a two-section structure, including a push rod outer frame section and a push rod telescopic section. A sliding cavity is provided in the push rod outer frame section, and the push rod telescopic section is slidably connected to the sliding cavity. A plurality of limiting holes are provided on the sliding cavity. The push rod telescopic section is provided with a second limiting wedge block, and the second limiting wedge block is unidirectionally slidably connected to the limiting hole; the push rod outer frame section is provided with a first limiting wedge block, and the first limiting wedge block is unidirectionally slidably connected to the limiting cover, and the limiting cover is provided at the end of the injection tube.

2. A sodium citrate prefilled anticoagulant syringe according to claim 1, characterized in that: The needles are arranged in a circular array in groups with the injection head as the center. The peripheral channels are provided corresponding to the needles and are located on the side of the needles away from the injection head.

3. The sodium citrate prefilled anticoagulant syringe according to claim 1, characterized in that: The cross-sections of the push rod outer frame section and the push rod telescopic section are both cross-shaped, and a cross-shaped through-opening is provided on the limit cover, which is adapted to the outer contour of the push rod outer frame section, and the first limit wedge is used to limit the sliding state of the push rod outer frame section in the through-opening.

4. A sodium citrate prefilled anticoagulant syringe according to claim 3, characterized in that: The limiting cover is further provided with a reset hole, which is an arc-shaped hole and is located on one side of the through-opening. The reset hole corresponds to the first limiting wedge block.

5. The sodium citrate prefilled anticoagulant syringe according to claim 1, characterized in that: The end of the telescopic section of the push rod is fixedly connected to a locking frame, and the locking frame has the same structure as the outer frame section of the push rod. The outer wall of the locking frame is fixedly connected to a third limiting wedge.

6. The sodium citrate prefilled anticoagulant syringe according to claim 1, characterized in that: There are two groups of second limiting wedge blocks, and the spacing between the two groups of limiting wedge blocks is the same as the spacing between the two limiting holes. There are 2-4 groups of first limiting wedge blocks, and the spacing between adjacent first limiting wedge blocks is 3-5 mm.

7. The sodium citrate prefilled anticoagulant syringe according to claim 1, characterized in that: A groove is provided on the piston at the end of the push rod. The volume of the groove is larger than the volume of the puncture needle and corresponds to the puncture needle.

Images