CN215349316U

CN215349316U - Flow-increasing ladder-shaped internal fistula needle

Info

Publication number: CN215349316U
Application number: CN202120309853.9U
Authority: CN
Inventors: 宋勇
Original assignee: Weihai Kalmade Medical Technology Co ltd
Current assignee: Weihai Kalmade Medical Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-12-31
Anticipated expiration: 2031-02-03

Abstract

The utility model discloses a flow-increasing trapezoid-opening internal fistula needle, which comprises a puncture needle and an indwelling sleeve, wherein the puncture needle is fixedly connected with a needle seat, and the indwelling sleeve is fixedly connected with a sleeve seat communicated with the indwelling sleeve; a separation mechanism is fixedly arranged in the indwelling cannula, and the puncture needle penetrates through the separation mechanism and is inserted into the indwelling cannula; the needle head part of the puncture needle forms symmetrical oblique planes on two sides, a flow increasing groove with a trapezoidal opening is formed in the puncture needle, a needle tail part of the puncture needle is provided with a frosting area, and an inwards-concave reinforcing groove is formed in the frosting area. The novel puncture needle is provided with the flow increasing groove with the trapezoidal opening, so that the channel volume of the indwelling hose into which blood flows is increased, the speed of the blood entering the indwelling hose is increased, the puncture depth is not required to be deepened, the pain of a patient can be relieved, and the puncture efficiency can be increased; meanwhile, the design of the puncture needle part is safer and more convenient, and the service performance of the internal fistula needle is further improved.

Description

Flow-increasing ladder-shaped internal fistula needle

Technical Field

The utility model relates to an internal fistula needle, in particular to a flow-increasing trapezoid-opening internal fistula needle.

Background

An internal fistula needle is a blood collection device mainly used for hemodialysis. Through internal fistula needle and the blood transfusion hose of being connected with internal fistula needle, dialyse the patient, patient's blood is introduced into the hemodialysis equipment in and is dialysed the back, flows back to the patient internally again. To traditional internal fistula needle, its puncture part only adopts ordinary pjncture needle usually, however, internal fistula needle has more and keeps somewhere the hose, and ordinary pjncture needle only can play the puncture effect, is difficult to make blood in time flow into and keeps somewhere in the hose, and for increasing blood flow rate from this, need pierce into darker degree of depth in order to increase the blood flow volume when initially piercing, to this, can cause great wound for the patient to can increase patient's psychological burden.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a flow-increasing ladder-shaped internal fistula needle.

In order to solve the technical problems, the utility model adopts the technical scheme that: a flow-increasing ladder-shaped internal fistula needle comprises a puncture needle and an indwelling sleeve, wherein the puncture needle is a solid needle and is fixedly connected with a needle seat, and the indwelling sleeve is fixedly connected with a sleeve seat and is communicated with the sleeve seat;

a separation mechanism is fixedly arranged in the indwelling cannula, and the puncture needle penetrates through the separation mechanism and is inserted into the indwelling cannula; the needle head part of the puncture needle extends out of the indwelling sleeve, symmetrical oblique planes are formed on two sides of the needle head part of the puncture needle, an inward-concave flow increasing groove is further formed in the puncture needle, the flow increasing groove is a trapezoidal opening, a needle tail part of the puncture needle is provided with a frosting area, an inward-concave reinforcing groove is formed in the frosting area, and the puncture needle is fixedly connected with the needle seat through the frosting area of the needle tail part;

the inner cavity of the cannula seat is separated into a communicating inner cavity by a separating mechanism, one side of the cannula seat is provided with a blood transfusion tube interface, and the indwelling cannula is communicated with the blood transfusion tube interface through the communicating inner cavity.

Further, the needle file is located the casing seat and is located partition mechanism's top, and the top of needle file has been seted up along the circumferencial direction and has been pressed spring mounting groove, is provided with pressing spring in the pressing spring mounting groove, presses spring coupling to have a pressing piece, and the pressing piece is formed with presses splenium, spacing portion, presses the splenium to extend to outside the casing seat, and spacing portion inserts the spacing inslot that forms in the casing seat.

Furthermore, the separating mechanism comprises a separating plug, a through hole which longitudinally penetrates through the separating plug is formed in the center of the separating plug, and the puncture needle penetrates through the through hole.

Furthermore, an annular groove communicated with the through hole is formed in the partition plug, a sealing plug is arranged in the annular groove, the sealing plug is divided into two halves, namely a first sealing plug and a second sealing plug, and the first sealing plug and the second sealing plug are respectively connected into the annular groove through compression springs.

Furthermore, a reinforced sealing block is fixedly arranged on the first sealing plug, and a sealing groove matched with the reinforced sealing block is formed in the second sealing plug.

Furthermore, the blood transfusion tube interface is communicated with a blood transfusion hose.

The utility model discloses a flow increasing ladder-shaped opening internal fistula needle, wherein a puncture needle is provided with a flow increasing groove in a ladder-shaped opening shape, so that the volume of a channel for blood to flow into an indwelling hose is increased, the blood flow is increased, the speed for the blood to flow into the indwelling hose is increased, the puncture depth is not required to be deepened, the pain of a patient can be relieved, and the puncture efficiency can be increased; meanwhile, the design of the puncture needle part is safer and more convenient, and the service performance of the internal fistula needle is further improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the puncture needle of fig. 1.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Fig. 4 is a schematic structural view of the partition mechanism in fig. 1.

Fig. 5 is a schematic cross-sectional structure view of the separating mechanism in fig. 1.

In the figure: 1. a cannula holder; 2. a needle seat; 3. a limiting groove; 4. a blood transfusion tube interface; 5. a blood transfusion hose; 6. puncturing needle; 7. an indwelling cannula; 8. pressing the spring mounting groove; 9. a pressing spring; 10. a pressing member; 11. a pressing part; 12. a limiting part; 13. a separation mechanism; 14. the inner cavity is communicated; 61. a flow increasing groove; 62. A sanding area; 63. reinforcing the groove; 64. a chamfer plane; 131. a partition plug; 132. a through hole; 133. an annular groove; 134. a compression spring; 135. a first sealing plug; 136. a second sealing plug; 137. a reinforced sealing block; 138. the groove is sealed.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

A flow-increasing ladder-shaped internal fistula needle is shown in figure 1 and comprises a puncture needle 6 and an indwelling sleeve 7, wherein the puncture needle 6 is fixedly connected with a needle base 2, and the indwelling sleeve 7 is fixedly connected with a sleeve base 1.

Wherein, pjncture needle 6 is used for the puncture, adopts solid needle and has linked firmly needle file 2, accomplishes the puncture back, takes away the pjncture needle, keeps somewhere sleeve pipe 7 and keeps somewhere in the blood vessel, keeps somewhere sleeve pipe 7 and adopts the flexible TPU material that is splendid with human biocompatibility to make, is linked firmly sleeve pipe seat 1 and is linked together with sleeve pipe seat 1 by keeping somewhere sleeve pipe 7.

As shown in fig. 2, which is a schematic structural view of the puncture needle, first, in order to improve the puncturing ability of the puncture needle, as shown in fig. 3, the needle portion of the puncture needle 6 is formed with symmetrical chamfered surfaces 64 at both sides, so that the puncture needle 6 has a sharp needle head, and puncturing can be performed more efficiently and more effectively; secondly, the puncture needle 6 is also provided with an inward-sunken flow increasing groove 61, the flow increasing groove 61 is in a trapezoid opening shape, and the punctured blood immediately flows into the flow increasing groove 61, so that compared with the traditional puncture needle without an opening, the flow increasing groove 61 effectively increases the volume of a channel for the blood to flow, further improves the flow of the blood, and enables the blood to flow into the indwelling hose 7 more quickly; the retention hose 7 partially covers the flow increasing groove 61, so that the needle head part of the puncture needle 6 extends out of the retention sleeve 7, blood flows into the flow increasing groove 61 and flows to the retention hose, meanwhile, the puncture needle is rapidly taken away, and the blood completely enters the retention hose, thereby completing the puncture action.

In addition, as also shown in fig. 1, in order to improve the connection stability between the puncture needle 6 and the needle seat 2, a frosted area 62 is arranged at the needle tail part of the puncture needle 6, and a reinforcing groove 63 which is concave inwards is arranged in the frosted area 62; the puncture needle 6 and the needle seat are integrally formed through injection molding, the frosted area 62 is of a structure with concave and convex points, and the arrangement of the frosted area 62 increases the connecting friction force and effectively enhances the pulling strength of the puncture needle and the needle seat; the reinforcing groove 63 directly improves the injection molding glue amount, and further improves the connection strength of the puncture needle and the needle seat.

As also shown in fig. 1, a partition mechanism 13 is fixedly arranged in the indwelling cannula 7, and the partition mechanism 13 partitions the inner cavity of the cannula holder 1; the upper half part separated by the separating mechanism 13 is used for installing the needle base 2, the lower half part separated by the separating mechanism 13 is a communicating through cavity 14, and one side of the cannula base 1 is provided with a blood conveying pipe interface 4, so that the indwelling cannula 7 is communicated with the blood conveying pipe interface 4 through the communicating inner cavity 14. The blood transfusion tube interface 4 is communicated with a blood transfusion tube 5, and the blood transfusion tube 5 is externally connected with hemodialysis equipment. Thus, the blood of the patient flows to the hemodialysis apparatus through the indwelling cannula 7, the communicating lumen 14, the blood transfusion tube connector 4, and the blood transfusion hose 5, and is dialyzed.

The puncture needle 6 is inserted into the indwelling cannula 7 through the partition mechanism 13; therefore, in order to ensure that the sealing performance of the communicating cavity 14 is not affected by the partition mechanism 13 after the puncture needle 6 is pulled out, as shown in fig. 3 and 4, the partition mechanism 13 comprises a partition plug 131, a through hole 132 longitudinally penetrating through the partition plug 131 is formed in the center of the partition plug 131, and the through hole 132 is used for the puncture needle 6 to pass through.

Meanwhile, an annular groove 133 communicated with the through hole 132 is formed in the partition plug 131, a sealing plug is arranged in the annular groove 133, the sealing plug is divided into two parts, namely a first sealing plug 135 and a second sealing plug 136, and the first sealing plug 135 and the second sealing plug 136 are respectively connected in the annular groove 133 through a compression spring 134. Therefore, in the initial state, the first sealing plug 135 and the second sealing plug are symmetrically extruded on two sides of the puncture needle 6, and the function of preventing the puncture needle from moving arbitrarily can be achieved to a certain extent. After the puncture needle 6 is pulled away, under the reset action of the compression spring 134, the first sealing plug 135 and the second sealing plug 136 are ejected from the annular groove 133 and seal the through hole; in order to relieve the pain of a patient, the puncture needle is usually extremely thin, the through hole is also extremely small, and the sealing plug with extremely high height can meet the requirement of sealing and communicating the inner cavity 14 under the larger extrusion pressure of the compression spring. In order to further improve the sealing performance of the first sealing plug 135 and the second sealing plug 136, a reinforcing sealing block 137 is fixedly arranged on the first sealing plug 135, a sealing groove 138 matched with the reinforcing sealing block 137 is formed in the second sealing plug 136, and a sealing gasket is laid in the sealing groove 138, so that the sealing performance of the communicating inner cavity 14 after the puncture needle is taken away is fully ensured.

In addition, for the takakoff of convenient pjncture needle, and make the pjncture needle when puncture handles can not remove at will, pressing spring mounting groove 8 has been seted up along the circumferencial direction at the top of needle file 2, is provided with pressing spring 9 in the pressing spring mounting groove 8, and pressing spring 9 is connected with pressing piece 10, and pressing piece 10 is the two parts of separation, and it is formed with presses splenium 11, spacing portion 12, presses splenium 11 to extend outside casing seat 1, and spacing portion 12 inserts in the spacing inslot 3 that the casing seat 1 formed. Therefore, the fixing of the puncture needle in the puncture process is realized under the action of the limiting part 12 and the limiting groove 3; the pressing part 10 is pressed to compress the pressing spring 9, the limiting part 12 is separated from the limiting groove 3, and the puncture needle can be easily and conveniently taken away.

For the flow-increasing trapezoid-mouth internal fistula needle disclosed by the utility model, the puncture needle 6 is punctured, the indwelling cannula 6 is retained in the blood vessel, the indwelling cannula is soft and has high biocompatibility, the extra damage to a patient is effectively avoided, and the dialysis pain is relieved; and, the needle point of pjncture needle 6 is sharp-pointed, has splendid puncture ability, sets up on pjncture needle 6 and is trapezoidal open-ended flow increase groove, has promoted the passageway volume that blood flow got into to keep somewhere the hose, promotes the blood flow volume and then has accelerated the speed that blood got into to keep somewhere the hose, need not to deepen the puncture degree of depth, can enough alleviate patient's misery, also can accelerate puncture efficiency. In addition, the needle seat of the puncture needle is connected with the cannula seat of the indwelling hose through the pressing mechanism, so that the puncture needle can be prevented from moving randomly during puncture treatment; and the needle seat is conveniently and quickly separated from the cannula seat by pressing the head part of the pressing piece 10, so that the puncture needle is quickly taken away.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.

Claims

1. The utility model provides a trapezoidal mouthful of internal fistula needle of increasing class, includes pjncture needle (6), keeps somewhere sleeve pipe (7), its characterized in that: the puncture needle (6) is a solid needle and is fixedly connected with a needle seat (2), and the indwelling cannula (7) is fixedly connected with a cannula seat (1) and is communicated with the cannula seat (1);

a separation mechanism (13) is fixedly arranged in the indwelling cannula (7), and the puncture needle (6) penetrates through the separation mechanism (13) and is inserted into the indwelling cannula (7); the needle head part of the puncture needle (6) extends out of the indwelling sleeve (7), symmetrical oblique planes (64) are formed at two sides of the needle head part of the puncture needle (6), an inward-concave flow increasing groove (61) is further formed in the puncture needle (6), the flow increasing groove (61) is a trapezoidal opening, a frosting area (62) is arranged at the needle tail part of the puncture needle (6), an inward-concave reinforcing groove (63) is formed in the frosting area (62), and the puncture needle (6) is fixedly connected with the needle base (2) through the frosting area (62) at the needle tail part;

the inner cavity of the cannula base (1) is divided into a communicating inner cavity (14) by a separating mechanism (13), one side of the cannula base (1) is provided with a blood transfusion tube interface (4), and the indwelling cannula (7) is communicated with the blood transfusion tube interface (4) through the communicating inner cavity (14).

2. The flow-increasing internal ladder fistula needle of claim 1, wherein: needle file (2) are located cannula seat (1) and are located the top of partition mechanism (13), and pressing spring mounting groove (8) have been seted up along the circumferencial direction at the top of needle file (2), are provided with in pressing spring mounting groove (8) and press spring (9), press spring (9) to be connected with according to pressure piece (10), according to pressure piece (10) be formed with according to splenium (11), spacing portion (12), press splenium (11) to extend to outside cannula seat (1), spacing portion (12) insert in spacing groove (3) that form in cannula seat (1).

3. The flow-increasing internal ladder fistula needle of claim 2, wherein: the separating mechanism (13) comprises a separating plug (131), a through hole (132) which longitudinally penetrates through the separating plug (131) is formed in the center of the separating plug (131), and the puncture needle (6) penetrates through the through hole (132).

4. The flow-increasing internal ladder fistula needle of claim 3, wherein: an annular groove (133) communicated with the through hole (132) is formed in the separating plug (131), a sealing plug is arranged in the annular groove (133), the sealing plug is divided into two parts, namely a first sealing plug (135) and a second sealing plug (136), and the first sealing plug (135) and the second sealing plug (136) are connected in the annular groove (133) through a compression spring (134).

5. The flow-increasing internal ladder fistula needle of claim 4, wherein: a reinforced sealing block (137) is fixedly arranged on the first sealing plug (135), and a sealing groove (138) matched with the reinforced sealing block (137) is formed in the second sealing plug (136).

6. The flow-increasing internal ladder fistula needle of claim 5, wherein: the transfusion tube interface (4) is communicated with a transfusion hose (5).