CN215608332U

CN215608332U - Prefillable venous indwelling needle

Info

Publication number: CN215608332U
Application number: CN202121880688.9U
Authority: CN
Inventors: 徐博; 袁萍; 蒋成芳; 陈璐; 杭春华
Original assignee: Nanjing Drum Tower Hospital
Current assignee: Nanjing Drum Tower Hospital
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-01-25
Anticipated expiration: 2031-08-12

Abstract

The utility model relates to a prefillable venous indwelling needle, which comprises a needle head and a positive pressure joint, wherein the needle head is connected with the positive pressure joint through a communicating pipe and keeps the inner side of the needle head communicated, one end of the positive pressure joint, which is far away from the communicating pipe, is detachably provided with a connector, the connector is connected with an extrusion bag through a connecting piece fixed with the connector, a partition plate is arranged between the extrusion bag and the connecting piece, and the partition plate is provided with a through hole; the inner side of the connecting piece is also provided with a one-way puncture component, the one-way puncture component is connected with a driving component arranged on the connecting piece, and the driving component can drive the one-way puncture component to move forwards so that the one-way puncture component penetrates through the through hole of the partition board and pierces the extrusion bag. The utility model has novel design, effectively avoids the pollution problem caused by the flushing of normal saline after the existing heparin cap is removed for many times, can effectively reduce the problem that the puncture of nurses is influenced by the puncture of the venous indwelling needle connected with priming solution, and has strong practicability.

Description

Prefillable venous indwelling needle

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a prefillable venous indwelling needle.

Background

The intravenous infusion treatment is a basic operation in clinical care work and is also an important means for treating various diseases and rescuing patients. The nurse is the main executor that carries out the venous transfusion treatment, and good vein puncture instrument not only is favorable to the nurse to operate, improves the puncture success rate, also can prevent catheter relevance blood stream infection, improves patient experience of seeking medical advice, promotes patient's satisfaction.

According to the requirements of American INS2016 edition 'transfusion therapy practice Standard' and the current use standard of the venous indwelling needle, the indwelling needle needs to be pre-filled with a tube before venipuncture is carried out so as to lubricate the tube, reduce the stimulation to the vein wall and achieve the purposes of reducing the occurrence of mechanical phlebitis and relieving the pain of patients in the puncture process. However, the currently clinically used venous indwelling needle has several disadvantages, such as the need to manually remove the heparin cap at the tail end before puncture, connect the priming solution for pre-filling the tube, and connect the positive pressure connector after puncture. In the whole operation process, the joint of the remaining needle is repeatedly opened, the sealing property of the puncture tool cannot be ensured, and the puncture tool is easily polluted. Meanwhile, the conventional priming solution is 5ml or 10ml, and when the venous indwelling needle connected with the priming solution is used for puncture, the puncture of a nurse is influenced due to gravity, so that the puncture success rate is reduced. There is therefore a need for an improved venipuncture tool.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a prefillable venous indwelling needle.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the prefillable venous indwelling needle comprises a needle head, a communicating pipe and a positive pressure joint, wherein the needle head is connected with the positive pressure joint through the communicating pipe, and the needle head is communicated with an internal pipeline of the communicating pipe; one end of the positive pressure joint, which is far away from the communicating pipe, is detachably connected with the connector; the connecting piece is of a hollow cylindrical structure and is fixedly connected to the end part of the connector; a front-back through channel is formed in the connector; the interior of the extrusion bag is a hollow cavity which is fixed at the end part of the connecting piece, and the interior of the extrusion bag is filled with pre-filling liquid; a partition plate is arranged between the extrusion bag and the connecting piece and is fixedly connected with the extrusion bag and the connecting piece; the partition board is provided with a through hole; the one-way puncture assembly is arranged in the connecting piece and comprises a puncture tube and a one-way valve, and the puncture tube is aligned with the through hole of the partition plate; the size of the through hole is matched with the outer diameter of the puncture tube, the puncture tube can penetrate through the through hole, the one-way valve is arranged in the puncture tube, the one-way valve can prevent the priming liquid flowing out of the extrusion bag from flowing back after passing through the puncture tube, and air in the communicating tube and the needle head can be smoothly discharged; the driving component is arranged on the connecting piece and is connected with the outer surface of the puncture tube; the driving component drives the puncture tube to penetrate through the through hole of the clapboard forwards and puncture the extrusion bag.

In order to optimize the technical scheme, the specific measures adopted further comprise:

furthermore, a through groove is formed in the end part of one side, connected with the connecting piece, of the interior of the connector, and the through groove is communicated with a channel in the connector; the outer diameter of the end part of the puncture tube is matched with the inner diameter of the through groove, the end part of the puncture tube can be tightly inserted into the through groove, the internal channel is ensured to be always in a closed state, the pre-filling liquid cannot leak when flowing into the connector from the puncture tube, and the end part of the puncture tube is inserted into the through groove; the length of the through groove is larger than the maximum distance of forward movement of the puncture tube, and when the puncture tube moves forward to the maximum distance, the end part of the puncture tube is still in the through groove.

Furthermore, the driving assembly comprises a threaded sleeve, a plurality of threaded blocks and a plurality of connecting rods; the threaded sleeve is movably connected to the connecting piece through the sliding assembly and can rotate around the connecting piece; the inner surface of the threaded sleeve is provided with threads; the number of the thread blocks and the number of the connecting rods are not less than two, and the thread blocks and the connecting rods are the same in number and correspond to one another; one end of each connecting rod is fixed on the outer surface of the puncture tube, and the other end of each connecting rod is fixedly connected with the bottom of the corresponding thread block; the upper surface of each thread block is provided with a thread structure matched with the thread on the inner surface of the threaded sleeve, each thread block is in threaded connection with the inner surface of the threaded sleeve, and each thread block can move on the inner surface of the threaded sleeve by virtue of threaded connection; the thread structure on the surface of the thread block group is matched with the threads on the inner surface of the threaded sleeve, and the thread block group can move on the inner surface of the threaded sleeve by virtue of threaded connection; the connecting piece is provided with a plurality of slots along the length direction, the number of the slots is the same as that of the connecting rods, the slots correspond to the connecting rods one by one, each slot is matched with the corresponding connecting rod, the connecting rods can be inserted into the corresponding slots along the length direction of the connecting piece, and the connecting rods can only move in the slots along the length direction of the connecting piece; the outer surface of the connecting piece is also provided with a plurality of movable grooves matched with the plurality of thread blocks along the length direction, the plurality of movable grooves are the same in number as the plurality of thread blocks and correspond to the plurality of thread blocks one by one, each thread block is arranged in the corresponding movable groove, and the thread blocks can only move in the movable grooves along the length direction of the connecting piece; the threaded sleeve is rotated, the plurality of threaded blocks and the plurality of connecting rods respectively move forwards in the corresponding movable grooves and the corresponding slots, and the puncture tube moves forwards.

Furthermore, the connecting rods are located on the same radial plane of the connecting piece, each connecting rod is arranged along the radial direction, the connecting rods are uniformly distributed around the outer surface of the puncture tube in the same plane in a surrounding mode, and the included angles of two adjacent connecting rods in the plane are the same.

Furthermore, the sliding assembly comprises a connecting annular sliding block and two annular sliding grooves; the annular sliding blocks are ring bodies, and the two annular sliding blocks are respectively fixed on the inner surfaces of two ends of the threaded sleeve; the two annular sliding grooves are respectively formed in the outer surfaces of the two ends of the connecting piece, and the two annular sliding blocks correspond to the two annular sliding grooves one to one; two annular sliders at two ends of the threaded sleeve are clamped in the corresponding annular sliding grooves respectively, and the threaded sleeve can rotate around the connecting piece.

Furthermore, the outer surface of the threaded sleeve is uniformly provided with a plurality of strip-shaped protrusions along the length direction, so that the friction force between the threaded sleeve and the hand of the medical staff is increased.

Furthermore, a diaphragm is fixed in the through hole of the partition plate and covers the whole through hole, and the diaphragm ensures that the priming solution in the extrusion bag cannot leak into the indwelling needle when the puncture tube does not puncture the extrusion bag.

Furthermore, the extrusion bag is made of medical silicon rubber materials, so that the pre-filling liquid in the extrusion bag can be extruded conveniently, and the extrusion bag is safer and more sanitary.

Further, the priming liquid in the extrusion bag is physiological saline.

Further, the end part of the puncture tube has the same structure as the end part of the needle.

The utility model has the beneficial effects that: the prefillable venous indwelling needle provided by the utility model is characterized in that a certain amount of normal saline is placed in the extrusion bag in advance, the puncture tube is driven to move forwards by rotating the threaded roller, the puncture tube can penetrate through the partition plate and then pierce the extrusion bag, the normal saline in the extrusion bag can enter the positive pressure connector along the puncture tube and then enter the communicating tube and the needle head through the positive pressure connector, the air in the needle head and the communicating tube can be discharged under the closed and sterile condition, the pollution problem caused by flushing the normal saline after the conventional heparin cap is removed for multiple times is effectively avoided, meanwhile, the problem that the nurse puncture is influenced by the puncture of the venous indwelling needle connected with the prefillable liquid is effectively reduced, and the prefillable venous indwelling needle is strong in practicability.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an internal structural view of the present invention (excluding the needle, the communicating tube and the positive pressure connector).

Fig. 3 is an exploded view of the structure of the driving assembly of the present invention.

Fig. 4 is a schematic sectional view of the screw cylinder, the connecting member and the internal structure thereof (section a-a in fig. 2) in the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a prefillable venous indwelling needle, which includes a needle head 1, a communicating tube 2, a positive pressure connector 3, a connector 4, a connector 8, a squeeze bag 6, a one-way puncture assembly and a driving assembly.

The needle head 1 is connected with the positive pressure joint 3 through the communicating pipe 2, the needle head 1 is communicated with an internal pipeline of the communicating pipe 2, and one end of the positive pressure joint 3, which is far away from the communicating pipe 2, is detachably connected with the connector 4; the interior of the connector 4 is provided with a through channel, which allows gas and liquid to flow into the positive pressure connector 3 and the communicating tube 2 from the connector 4 and finally to be discharged from the end of the needle 1. The needle 1, the communicating tube 2 and the positive pressure joint 3 in the utility model are all the prior art, and the structure thereof is not described herein again.

As shown in fig. 2, a through groove 13 is formed in the end portion of the interior of the connecting head 4, which is connected to the connecting piece 8, and the through groove 13 is communicated with the channel in the interior of the connecting head 4.

The connecting piece 8 is of a hollow cylindrical structure, one end of the connecting piece 8 is fixedly connected with the end part of the connector 4 (namely, the end far away from the positive pressure joint 3), and the other end of the connecting piece 8 is fixed with the extrusion bag 6; the interior of the extrusion bag 6 is a hollow cavity, and the interior of the extrusion bag is filled with priming solution (the specification of the priming solution is 5ml or 10 ml). The priming solution described in this example is normal saline; a partition plate 9 is also arranged between the extrusion bag 6 and the connecting piece 8, and the partition plate 9 is fixedly connected with the extrusion bag 6 and the connecting piece 8; the partition board 9 is provided with a through hole, a diaphragm 10 is fixed in the through hole of the partition board 9, the diaphragm 10 covers the whole through hole, and the diaphragm 10 ensures that the priming solution in the extrusion bag 6 cannot leak into the interior of the vein indwelling needle when the puncture tube 11 does not puncture the extrusion bag 6.

The one-way puncture assembly comprises a puncture tube 11 and a one-way valve, which is located inside the connector 8. The puncture tube 11 is aligned with the through hole of the partition board 9, the puncture tube 11 can puncture the diaphragm 10, penetrate through the through hole of the partition board 9 and finally puncture the squeeze bag 6, so that the pre-filling liquid in the puncture tube 11 flows out along the inside of the puncture tube; the one-way valve is arranged inside the puncture tube 11, and can prevent the pre-filling liquid from flowing back after passing through the puncture tube 11, so that the air in the communicating tube 2 and the needle head 1 can be discharged smoothly; the non-return valve belongs to the prior art already disclosed and is not within the scope of protection of the present invention.

The outer diameter of the end part of the puncture tube 11 is matched with the inner diameter of the through groove 13, the end part of the puncture tube 11 can be tightly inserted into the through groove 13, the connector 4 and the inner channel of the puncture tube 11 are always in a closed sterile state, and the priming solution cannot leak when flowing into the connector 4 from the puncture tube 11; the length of the through slot 13 is greater than the maximum distance the puncture tube 11 is moved forward, and when the puncture tube 11 is moved forward to the maximum distance, the end of the puncture tube 11 remains in the through slot 13.

As shown in fig. 3 and 4, the driving assembly includes a threaded sleeve 5, a threaded block 14, and a connecting rod 12.

The threaded sleeve 5 is sleeved on the connecting piece 8, two ends of the inner surface of the threaded sleeve 5 are respectively fixed with an annular sliding block, and the annular sliding blocks are annular bodies; two annular sliding grooves are respectively formed in corresponding positions of two ends of the outer surface of the connecting piece 8 (namely the positions of the two annular sliding blocks corresponding to the two ends of the outer surface of the connecting piece 8), and the two annular sliding blocks correspond to the two annular sliding grooves one by one; two annular slider at 5 both ends of screw sleeve block respectively in the annular spout that corresponds, and screw sleeve 5 can be around 8 fixed rotations of connecting piece, and annular slider and annular spout can prevent effectively that screw sleeve 5 from rotating in-process offset.

The inner surface of the threaded sleeve 5 is threaded.

The number of the thread blocks 14 and the number of the connecting rods 12 are 6, the thread blocks and the connecting rods 12 are in one-to-one correspondence, one end of each connecting rod 12 is fixed on the outer surface of the puncture tube 11, and each connecting rod 12 is arranged along the radial direction of the puncture tube 11; the other end of each connecting rod 12 is fixedly connected with the bottom of a corresponding thread block 14, the upper surface of each thread block 14 is provided with a thread structure matched with the thread of the inner surface of the threaded sleeve 5, and each thread block 14 can move on the inner surface of the threaded sleeve through the thread structure on the surface; the thread blocks 14 form a thread block group, the thread structure on the surface of the thread block group is matched with the thread on the inner surface of the thread sleeve 5, and the thread block group can move on the inner surface of the thread sleeve through the thread structure on the surface.

The connecting piece 8 is provided with 6 slots along the length direction, the number of the slots is the same as that of the connecting rods 12, the slots correspond to the connecting rods 12 one by one, each slot is matched with the corresponding connecting rod 12, each connecting rod 12 is arranged in the corresponding slot, and the connecting rods 12 can move in the corresponding slots along the length direction of the connecting piece 8; the outer surface of the connecting piece 8 is also provided with a plurality of movable grooves 7 matched with the thread blocks 14 along the length direction, the number of the movable grooves 7 is the same as that of the thread blocks 14, the movable grooves 7 correspond to the thread blocks 14 one by one, each thread block 14 can be clamped in the corresponding movable groove 7, and the thread block 14 can move along the length direction of the connecting piece 8 in the corresponding movable groove 7.

By rotating the threaded sleeve 5, each threaded block 14 moves forward in the corresponding movable groove 7 through the transmission action of the threaded connection; each connecting rod 12 is driven by the corresponding thread block 14 to move forwards in the corresponding slot, the thread block 14 and the connecting rod 12 drive the puncture tube 11 to move forwards, the puncture tube 11 penetrates through the through hole of the partition plate 9 and pierces the diaphragm 10, and finally pierces the surface of the extrusion bag 6, the priming solution in the extrusion bag 6 flows into the connector 4, the positive pressure connector 3 and the communicating tube 2 along the puncture tube 11 in sequence, and is finally discharged from the end part of the needle head 1, and all air in the vein retention needle is discharged while the priming solution is discharged.

In the present embodiment, the number of the connecting rods 12 and the number of the screw blocks 14 may be any number of 2 or more.

Preferably, the connecting rods 12 are located in the same radial plane of the connecting member 8, the connecting rods 12 are uniformly distributed around the outer surface of the puncture tube 11 in the same plane, and the included angles of two adjacent connecting rods 12 in the plane are the same.

Preferably, the outer surface of the threaded sleeve 5 is uniformly provided with a plurality of strip-shaped protrusions along the length direction, so that the friction force between the threaded sleeve 5 and the hand of the medical staff is increased, and the threaded sleeve 5 is easier to rotate.

Preferably, the extrusion bag 6 is made of medical silicone rubber material, so that the pre-filling liquid in the extrusion bag 6 can be extruded conveniently, and the extrusion bag is safer and more sanitary.

Preferably, the end of the piercing tube 11 (i.e., the end adjacent to the expression capsule 6) is of the same configuration as the end of the needle 1 (i.e., the end that penetrates the skin of the human body) to effectively pierce the septum 10 and the surface of the expression capsule 6.

During the use, rotatory threaded sleeve 5 makes puncture pipe 11 remove forward, until the tip of puncture pipe 11 passes through and pierces through diaphragm 10 in the baffle 9 through-hole, press extrusion bag 6 simultaneously, make the saline in the extrusion bag 6 flow along the passageway in puncture pipe 11, saline flows to logical groove 13 from puncture pipe 11 internal flow, and through connector 4, malleation joint 3 and communicating pipe 2, finally discharge from the tip of syringe needle 1, accomplish the lubrication to syringe needle 1 and the inside pipeline of communicating pipe 2, discharge the inside air of vein indwelling needle, reach the emergence that reduces mechanical phlebitis and alleviate the painful purpose of puncture in-process patient. The skin puncture can be performed after the physiological saline and the air in the indwelling needle are all discharged.

It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the utility model, and the relative relationship between the terms and the terms is not limited by the scope of the utility model.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may be made by those skilled in the art without departing from the principle of the utility model.

Claims

1. The prefillable venous indwelling needle comprises a needle head (1), a communicating pipe (2) and a positive pressure joint (3), wherein the needle head (1) is connected with the positive pressure joint (3) through the communicating pipe (2), and the needle head (1) is communicated with an internal pipeline of the communicating pipe (2), and the prefillable venous indwelling needle is characterized by further comprising a connector (4), a connecting piece (8), an extrusion bag (6), a one-way puncture assembly and a driving assembly;

one end of the positive pressure joint (3) far away from the communicating pipe (2) is detachably connected with the connector (4);

the connecting piece (8) is a hollow cylindrical structure and is fixed at the end part of the connector (4); a front-back through channel is formed in the connector (4);

the interior of the extrusion bag (6) is a hollow cavity which is fixed at the end part of the connecting piece (8), and the interior of the extrusion bag (6) is filled with priming solution;

a partition plate (9) is also arranged between the extrusion bag (6) and the connecting piece (8), and the partition plate (9) is fixedly connected with the extrusion bag (6) and the connecting piece (8); a through hole is formed on the partition board (9);

the one-way puncture assembly is arranged inside the connecting piece (8) and comprises a puncture tube (11) and a one-way valve, and the puncture tube (11) can puncture the surface of the squeezing bag (6); the puncture tube (11) is aligned with the through hole of the clapboard (9), and the size of the through hole is matched with the outer diameter of the puncture tube (11); the one-way valve is arranged inside the puncture tube (11);

the driving component is arranged on the connecting piece (8) and is connected with the outer surface of the puncture tube (11); the driving component drives the puncture tube (11) to penetrate through the through hole of the clapboard (9) forwards and puncture the extrusion bag (6).

2. The prefillable venous indwelling needle according to claim 1, wherein a through groove (13) is formed in the end portion of one side of the inside of the connector (4) connected to the connector (8), and the through groove (13) communicates with a passage in the inside of the connector (4);

the outer diameter of the end part of the puncture tube (11) is matched with the inner diameter of the through groove (13), and the end part of the puncture tube (11) is inserted into the through groove (13);

the length of the through groove (13) is larger than the maximum distance of forward movement of the puncture tube (11).

3. A prefillable venous indwelling needle according to claim 1, wherein said drive assembly comprises a threaded sleeve (5), a plurality of threaded blocks (14) and a plurality of connecting rods (12);

the threaded sleeve (5) is movably connected to the connecting piece (8) through a sliding assembly, and the threaded sleeve (5) can rotate around the connecting piece (8);

the inner surface of the threaded sleeve (5) is provided with threads;

the number of the thread blocks (14) and the number of the connecting rods (12) are not less than two, and the thread blocks (14) are the same as the connecting rods (12) and are in one-to-one correspondence; one ends of the connecting rods (12) are fixed on the outer surface of the puncture tube (11), and the other ends of the connecting rods (12) are fixedly connected with the bottoms of the corresponding thread blocks (14);

the upper surface of each thread block (14) is provided with a thread structure matched with the thread on the inner surface of the threaded sleeve (5), and each thread block (14) is in threaded connection with the inner surface of the threaded sleeve (5);

the thread blocks (14) form a thread block group, and the thread structure on the surface of the thread block group is matched with the thread on the inner surface of the threaded sleeve (5);

a plurality of slots are formed in the connecting piece (8) along the length direction, the number of the slots is the same as that of the connecting rods (12), the slots correspond to the connecting rods (12) one by one, each slot is matched with the corresponding connecting rod (12), and each connecting rod (12) is arranged in the corresponding slot;

the outer surface of the connecting piece (8) is also provided with a plurality of movable grooves (7) matched with the plurality of thread blocks (14) along the length direction, the number of the movable grooves (7) is the same as that of the plurality of thread blocks (14), the movable grooves correspond to the thread blocks (14) one by one, and each thread block (14) is arranged in the corresponding movable groove (7);

the threaded sleeve (5) is rotated, the plurality of threaded blocks (14) and the plurality of connecting rods (12) are respectively transmitted forwards in the corresponding movable grooves (7) and the corresponding slots, and the puncture tube (11) moves forwards.

4. A prefillable venous indwelling needle according to claim 3, wherein the connecting rods (12) are located in the same radial plane of the connecting member (8), each connecting rod (12) being arranged in a radial direction, the connecting rods (12) being evenly distributed around the outer surface of the puncture tube (11) in the same plane.

5. A prefillable venous retention needle as defined in claim 3, wherein said slide assembly comprises a continuous annular slider and two annular chutes;

the annular sliding blocks are ring bodies, and the two annular sliding blocks are respectively fixed on the inner surfaces of two ends of the threaded sleeve (5);

the two annular sliding grooves are respectively formed in the outer surfaces of the two ends of the connecting piece (8), and the two annular sliding blocks correspond to the two annular sliding grooves one to one; two annular sliding blocks at two ends of the threaded sleeve (5) are respectively clamped in the corresponding annular sliding grooves.

6. A prefillable venous indwelling needle according to claim 3, wherein the outer surface of the threaded sleeve (5) is provided with a number of strip-shaped protrusions uniformly along the length direction.

7. A prefillable venous indwelling needle according to claim 1, wherein a septum (10) is further fixed in the through hole of the septum (9), and the septum (10) covers the whole through hole.

8. The prefillable venous indwelling needle of claim 1, wherein said squeeze bag (6) is of a medical silicone rubber material.

9. A prefillable venous retention needle according to claim 1, wherein the priming liquid inside said squeeze bag (6) is physiological saline.

10. A prefillable venous indwelling needle according to claim 1, wherein the end of the puncture tube (11) is of the same configuration as the end of the needle (1).