CN211484831U - Puncture needle for deep vein catheterization - Google Patents

Abstract

The utility model belongs to the technical field of dark vein catheterization technique and specifically relates to a dark vein catheterization pjncture needle is related to. The deep vein catheterization puncture needle comprises a needle core, a sheath tube and a fixing part; the needle core comprises a needle point, a needle body and a needle tail which are sequentially connected, and the sheath tube is sleeved on the needle body; the rear end of the sheath tube is an open end, the needle tail is connected with the fixed part, and the fixed part is detachably connected with the open end of the sheath tube; the front end of the sheath tube is conical, and the conical front end and the needle point form smooth transition so that the front end of the sheath tube forms a closed end and can be penetrated into the vein along with the needle point; thereby only need accomplish the puncture earlier through the nook closing member, then impel certain length in to dark vein with the sheath pipe along the nook closing member, handheld fixed part withdraws from the nook closing member at last and can conveniently, swiftly accomplish dark vein and put the pipe, and the step is simple, and easy operation can reduce patient subcutaneous damage to a certain extent, reduces the chance that the patient infects.

Description

deep vein catheterization needle

technical field

The utility model relates to the technical field of deep vein catheterization, in particular to a deep vein catheterization puncture needle.

Background technique

In the hospital, deep venous puncture cannulation is performed for patients, especially critically ill patients, mechanically ventilated patients, and patients with unstable hemodynamics, to ensure venous access; traditional deep venous cannulation requires puncturing the vein with a puncture needle first. After confirming that the puncture is successful, fix the position of the puncture needle with one hand, and send the guide wire into the vein with the other hand; after the guide wire is sent, fix the guide wire, withdraw the puncture needle, and then send it into the catheter along the guide wire, and then withdraw the guide wire after the catheter is in place. , so as to complete the deep vein catheterization; the deep vein catheterization process is cumbersome, and often requires multiple people to cooperate with the operation at the same time, and because of the many steps, the risk of infection of the patient is also increased during the operation.

Utility model content

The purpose of the utility model is to provide a deep vein catheterization puncture needle, so as to solve the technical problem of complicated operation of deep vein catheterization in the prior art to a certain extent.

The utility model provides a deep vein catheterization puncture needle, comprising a needle core, a sheath tube and a fixing part; the needle core comprises a needle tip, a needle body and a needle tail which are connected in sequence; the sheath tube runs along the needle The length direction of the body is sleeved on the needle body; and the end of the sheath tube facing the needle tip is a closed end; the end of the sheath tube facing the needle tail is an open end; The fixing portion is connected, and the fixing portion is detachably connected with the open end of the sheath tube.

Further, a blood inlet hole is formed on the tip of the needle, a bleeding hole is formed on the side of the needle body close to the closed end; and a first connection between the blood inlet hole and the bleeding hole is formed in the needle core. A blood return channel, the sheath tube communicates with the first blood return channel through the bleeding hole, so that blood enters the sheath tube through the first blood return channel.

Further, a second blood return channel is formed in the needle core, which runs through the needle tip and the needle tail; the fixing part is a syringe; the needle tail of the needle core is communicated with the syringe, so that the blood can pass through The second blood return channel enters into the syringe.

Further, the sheath tube includes a tube placement part and a connection part; the tube placement part is connected with the connection part, and the tube placement part is located on the side facing the needle tip; the diameter of the connection part is larger than The diameter of the tube placement portion, the open end is formed at one end of the connecting portion facing the needle tail; one end of the fixing portion can be inserted into the connecting portion through the open end.

Further, it also includes a three-way joint; a branch pipe is formed on the side wall of the connecting part; the branch pipe is communicated with one nozzle of the three-way joint, and the other two nozzles of the three-way joint are used for Connected with infusion equipment and pressure measuring equipment.

Further, a built-in component is disposed inside the side of the connecting portion close to the open end, which is used to prevent blood from flowing out; the needle body can pass through the built-in component.

Further, the built-in part is a high-density sponge pad.

Further, scales are provided on the outer wall of the tube placement portion.

Further, the length of the tube placement portion is 8-10 cm.

Further, the model of the needle core is 16G-20G.

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

The deep vein catheterization puncture needle provided by the utility model comprises a needle core, a sheath tube and a fixing part; the needle core is sequentially formed with a needle tip, a needle body and a needle tail along the length direction of the needle core; the sheath tube is sleeved on the needle along the length direction of the needle core On the outside of the body, the needle tip and the needle tail protrude from the two ends in the length direction of the sheath tube respectively; the end of the sheath tube facing the needle tip is the front end, the end of the sheath tube facing the needle tail is the rear end, the rear end of the sheath tube is the open end, and the sheath tube is the open end. The front end of the tube is tapered. When the sheath tube is sleeved on the outside of the needle body, the tapered front end of the sheath tube is tightly wrapped on the outside of the needle body, so that the front end of the sheath tube forms a closed end, and the tapered shape of the sheath tube is formed. The front end and the needle tip form a smooth transition; when the deep vein puncture needle is pierced into the vein, the front end of the sheath can pierce the vein together with the needle tip, and the blood in the vein cannot enter from the connection between the needle tip and the sheath to the sheath and the sheath. Between the needle bodies; when the sheath tube and the needle core need to be separated, it is only necessary to apply a certain force to push and pull the sheath tube or needle core along the length of the needle core. The fixing part is detachably connected to the rear end of the sheath tube, and the fixing part can block the open end of the rear end of the sheath tube when the deep vein catheterization needle is not in use; the needle tail is inserted into the fixing part, and the needle tail is fixed with the The part is fixedly connected, and the hand-held fixed part can push the needle core inward or pull it out. In the specific clinical use process, firstly, the needle tip is inserted into the deep vein by the method of in vitro dissection or ultrasound guidance to observe the return blood. The sheath tube moves forward along the needle core until the sheath tube enters the deep vein for a predetermined length; then the needle core is pulled back by holding the fixing part to complete the deep vein catheterization conveniently and quickly. The steps are simple, easy to operate, and can To a certain extent, the subcutaneous injury of the patient is avoided and the chance of infection of the patient is reduced.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is a kind of structural representation of the deep vein catheterization needle provided by the embodiment of the present invention;

Fig. 2 is another structural schematic diagram of the deep vein catheterization needle provided by the embodiment of the present invention.

Reference number:

1-Needle core, 11-Bleeding hole, 12-Bleeding hole, 13-First blood return channel, 14-Second blood return channel, 2-Sheath tube, 21-Cannulation part, 22-Connecting part, 3-Fixing part , 4-Tee joint, 5-Built-in, 6-branch.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments.

The components of the embodiments of the invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The deep vein catheterization needle according to some embodiments of the present application will be described below with reference to FIG. 1 and FIG. 2 .

The present application provides a puncture needle for deep vein catheterization, as shown in Figures 1 and 2, comprising a needle core 1, a sheath tube 2 and a fixing part 3; the needle core 1 includes a needle tip, a needle body and a needle that are connected in sequence The end of the sheath tube 2 is sleeved on the needle body along the length direction of the needle body; and the end of the sheath tube 2 towards the needle tip is a closed end; the end of the sheath tube 2 towards the needle tail is an open end; connected, and the fixed part 3 is detachably connected to the open end of the sheath tube 2 .

The deep vein catheterization needle provided in this application includes a needle core 1, a sheath tube 2 and a fixing part 3; the needle core 1 is formed with a needle tip, a needle body and a needle tail in sequence along its length direction; The direction is sleeved on the outside of the needle body, and the needle tip and the needle tail extend from the two ends of the length direction of the sheath tube 2 respectively; the end of the sheath tube 2 towards the needle tip is the front end, the end of the sheath tube 2 towards the needle tail is the rear end, The rear end of the sheath tube 2 is an open end, and the front end of the sheath tube 2 is tapered. When the sheath tube 2 is sleeved on the outside of the needle body, the tapered front end of the sheath tube 2 is tightly wrapped on the outside of the needle body, so that the sheath tube 2 The front end of the sheath tube 2 forms a closed end, and the tapered front end of the sheath tube 2 forms a smooth transition with the needle tip; when the needle core 1 is pierced into the vein, the front end of the sheath tube 2 can be pierced into the vein together with the needle tip, and the blood in the vein It is impossible to enter between the sheath tube 2 and the needle body from the connection between the needle tip and the sheath tube 2; when it is necessary to separate the sheath tube 2 and the needle core 1, you only need to apply a certain force to push and pull the sheath tube 2 along the length of the needle core 1. Or needle core 1. The fixing part 3 is detachably connected to the rear end of the sheath tube 2, and the fixing part 3 can block the open end of the rear end of the sheath tube 2 when the deep vein catheterization needle is not in use; the needle tail is inserted into the fixing part 3 , and the needle tail is fixedly connected with the fixing part 3 , and holding the fixing part 3 can push the needle core 1 inward or pull it outward.

In the specific clinical use process, the needle tip is first pierced into the deep vein by in vitro anatomy or ultrasound guidance to observe the return of blood. , move the sheath tube 2 forward along the needle core 1 until the sheath tube 2 enters the deep vein for a predetermined length; then hold the fixing part 3 and withdraw the needle core 1 backward to complete the deep vein catheterization conveniently and quickly. Compared with the existing puncture and tube placement method, that is, the puncture needle is successfully punctured first, the puncture needle is fixed, and then the guide wire is fed along the puncture needle, and then the fixed guide wire exits the puncture needle. The guide wire is placed into the central venous catheter, and the guide wire is withdrawn after the central venous catheter is in place. The whole process has many steps and usually requires the assistance of two people, which increases the risk of infection of the patient to a certain extent. However, using the deep vein catheterization needle of the present application, after the puncture is completed, the sheath tube 2 sheathed on the outer side of the needle core 1 is directly pushed forward along the needle core 1 to a predetermined position. , the needle core 1 is withdrawn to complete the deep vein catheterization. The steps are simple and easy to operate, which can avoid the patient's subcutaneous injury to a certain extent and reduce the chance of the patient's infection.

In an embodiment of the present application, preferably, as shown in FIG. 1 , a blood inlet hole 11 is formed on the needle tip, and a blood inlet hole 12 is formed on the side of the needle body close to the closed end; The hole 11 is connected to the first blood return channel 13 of the bleeding hole 12 , and the sheath tube 2 communicates with the first blood return channel 13 through the bleeding hole 12 , so that blood enters the sheath tube 2 through the first blood return channel 13 .

In this embodiment, a blood inlet hole 11 is formed on the side wall of the needle tip located outside the sheath tube 2 , and a bleeding hole 12 is formed on the side wall of the needle body located in the sheath tube 2 and close to the front end of the sheath tube 2 , the needle core 1 is formed with a first blood return channel 13 extending along the length direction of the needle core 1, one end of the first blood return channel 13 is connected with the blood inlet hole 11, the blood in the deep vein can pass through the blood inlet hole 11 on the needle tip into the first blood return channel 13; the other end of the first blood return channel 13 is communicated with the bleeding hole 12, and the first blood return channel 13 is communicated with the sheath tube 2 through the bleeding hole 12; when the needle tip pierces the deep vein of the patient At this time, the blood in the deep vein flows into the first blood return channel 13 through the blood inlet hole 11 on the side wall of the needle tip, and then flows into the sheath tube 2 through the bleeding hole 12. The sheath tube 2 is made of transparent material. The blood flowing into the sheath tube 2 can be directly observed, so that the successful puncture can be judged according to the returned blood.

In an embodiment of the present application, preferably, as shown in FIG. 2 , the needle core 1 is formed with a second blood return channel 14 penetrating the needle tip and the needle tail; the fixing part 3 is a syringe; the needle tail of the needle core 1 is connected to the syringe connected, so that the blood enters the syringe through the second blood return channel 14 .

In this embodiment, another structure of the needle core 1 and the corresponding form of the fixing part 3 are also provided to facilitate the medical staff to observe the blood return; The second blood return channel 14, that is, the head end of the needle tip is formed with a blood inlet hole 11, the tail end of the needle tail is formed with a bleeding hole 12, and one end of the second blood return channel 14 in the length direction is communicated with the blood inlet hole 11 of the needle tip. The other end in the length direction of the blood return channel 14 is communicated with the bleeding hole 12 of the needle tail. When the needle tip of the needle core 1 is pierced into the deep vein of the patient, the blood in the deep vein will flow into the deep vein through the blood inlet hole 11 of the needle tip. The second blood return channel 14 then flows out through the bleeding hole 12 of the needle tail.

The fixed part 3 connected to the needle tail of the needle core 1 is a syringe, and the blood flowing back into the second blood return channel 14 finally flows into the syringe, so that the medical staff can observe the blood return and judge the puncture is successful.

In an embodiment of the present application, preferably, as shown in FIGS. 1 and 2 , the sheath tube 2 includes a tube placement portion 21 and a connection portion 22 ; the tube placement portion 21 is connected to the connection portion 22 , and the tube placement portion 21 It is located on the side facing the needle tip; the diameter of the connecting portion 22 is larger than the diameter of the tube placement portion 21, and one end of the connecting portion 22 facing the needle tail is formed with an open end; one end of the fixing portion 3 can be inserted into the connecting portion 22 through the open end Inside.

In this embodiment, the sheath tube 2 includes a tube placement portion 21 and a connection portion 22, and the connection portion 22 is connected to one end of the tube placement portion 21 in the length direction; when the sheath tube 2 is sleeved on the needle body, the tube placement portion 21 At the end close to the needle tip, the connecting portion 22 is located at the end close to the needle tail. The tube placement portion 21 has a predetermined length. When the sheath tube 2 is sleeved on the needle body, the tube placement portion 21 is close to the needle body and wrapped around the outside of the needle body. The end of the tube placement portion 21 facing the needle tip is the front end of the sheath tube 2 . It is tapered, and the tapered front end smoothly transitions with the needle tip, so that the front end of the cannula part 21 can be inserted into the vein together with the needle tip, and the blood will not enter into the vein from the end of the cannula part 21 connected with the needle core 1. Inside the sheath tube 2; after the puncture is successful, push the sheath tube 2 to make the catheter placement portion 21 enter the deep vein for a predetermined length, and withdraw the needle core 1 to complete the placement of the catheter. One end of the connecting portion 22 facing the needle tail, that is, the rear end of the sheath tube 2, is an open end, and one end of the fixing portion 3 connected with the needle tail of the needle core 1 can be inserted into the open end, so that the fixing portion 3 and the sheath can be inserted into the open end. The tubes 2 are plugged together; the diameter of the connecting portion 22 is larger than the diameter of the tube placement portion 21 , so that other devices and components can be connected to the sheath tube 2 through the connecting portion 22 .

In an embodiment of the present application, preferably, as shown in FIG. 1 and FIG. 2 , the deep vein catheterization needle further includes a three-way joint 4; a branch pipe 6 is formed on the side wall of the connecting part 22; One pipe port of the through joint 4 is communicated with, and the other two pipe ports of the three-way joint 4 are used to communicate with the infusion equipment and the pressure measuring equipment.

In this embodiment, a branch pipe 6 is formed on the side wall of the connecting part 22, and the port of the branch pipe 6 is communicated with a nozzle of the three-way joint 4; the second nozzle of the three-way joint 4 can be connected to the infusion equipment. Connected, so that the infusion equipment is connected with the sheath 2, so that after the patient's deep vein cannulation is completed, the patient can be infused through the infusion equipment; the third port of the tee joint 4 The pressure device is connected to realize the measurement of the patient's venous pressure.

In an embodiment of the present application, preferably, as shown in FIGS. 1 and 2 , a built-in member 5 is provided inside the side of the connecting portion 22 close to the open end to prevent blood from flowing out; the needle body can pass through the built-in Piece 5.

In this embodiment, a built-in part 5 is arranged inside the connecting part 22, and the built-in part 5 is located on the side of the connecting part 22 close to the open end, so that the built-in part 5 will not interfere with the communication between the branch pipe 6 and the tube placement part 21, And the inner part 5 can make the needle core 1 pass through; during the process of puncturing the catheter, the backflow blood will enter the sheath tube 2 , and the inner part 5 can prevent the blood from flowing out through the open end of the sheath tube 2 .

In an embodiment of the present application, preferably, as shown in FIG. 1 and FIG. 2 , the built-in component 5 is a high-density sponge pad.

In this embodiment, the built-in member 5 is a high-density sponge pad, and the high-density sponge pad can be inserted into the connecting portion 22 of the sheath tube 2 conveniently and quickly, so as to absorb the blood entering the sheath tube 2 and prevent the blood from overflowing The sheath tube 2 also enables the needle tail of the needle core 1 to pass through.

In an embodiment of the present application, preferably, as shown in FIG. 1 and FIG. 2 , scales are provided on the outer wall of the tube placement portion 21 .

In this embodiment, scales are provided on the outer wall of the catheter placement portion 21, so that the medical staff can directly read the length of the catheter placement portion 21 extending into the deep vein.

In an embodiment of the present application, preferably, as shown in FIGS. 1 and 2 , the length of the tube placement portion 21 is 8-10 cm.

In this embodiment, the length of the intubation portion 21 is 8-10 cm, so as to meet the requirements of deep vein intubation, so that the intubation portion 21 can reach the deep vein and extend into the deep vein to a sufficient depth.

In an embodiment of the present application, preferably, as shown in FIG. 1 and FIG. 2 , the model of the needle core 1 is 16G-20G.

In this embodiment, the model of the needle core 1 is 16G-20G to meet the requirements of deep vein puncture; The diameter is 0.90mm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. a deep vein catheterization puncture needle, is characterized in that, comprises needle core, sheath tube and fixing part; The needle core includes a needle tip, a needle body and a needle tail which are connected in sequence; The sheath tube is sleeved on the needle body along the length direction of the needle body; the end of the sheath tube facing the needle tip is a closed end; the end of the sheath tube facing the needle tail is an open end end; The needle tail is connected with the fixing part, and the fixing part is detachably connected with the open end of the sheath tube. 2 . The deep vein catheterization needle according to claim 1 , wherein a bleeding hole is formed on the needle tip, and a bleeding hole is formed on the side of the needle body close to the closed end; 3 . The needle core is formed with a first blood return channel that communicates with the blood inlet hole and the bleeding hole, and the sheath is communicated with the first blood return channel through the bleeding hole, so that the blood can pass through the first blood return channel. A return channel enters the sheath. 3 . The deep vein catheterization needle according to claim 1 , wherein a second blood return channel is formed in the needle core and penetrates through the needle tip and the needle tail; 4 . The fixing part is a syringe; the needle tail of the needle core communicates with the syringe, so that blood enters the syringe through the second blood return channel. 4. The deep vein catheterization needle according to claim 1, wherein the sheath tube comprises a catheterization part and a connecting part; the tube placement part is connected with the connection part, and the tube placement part is located on the side facing the needle tip; The diameter of the connecting portion is larger than the diameter of the tube placement portion, and one end of the connecting portion facing the needle tail is formed with the open end; one end of the fixing portion can be inserted into the tube through the open end. inside the connection. 5. The deep vein catheterization needle according to claim 4, further comprising a three-way joint; A branch pipe is formed on the side wall of the connecting part; the branch pipe is communicated with one pipe port of the three-way joint, and the other two pipe ports of the three-way joint are used to communicate with the infusion equipment and the pressure measuring equipment . 6 . The deep vein catheterization needle according to claim 4 , wherein a built-in part is arranged inside the side of the connecting portion close to the open end to prevent blood from flowing out; 7 . The needle can pass through the insert. 7 . The deep vein catheterization needle according to claim 6 , wherein the built-in component is a high-density sponge pad. 8 . 8 . The deep vein catheterization needle according to claim 4 , wherein a scale is provided on the outer wall of the catheterization part. 9 . 9 . The deep vein catheterization puncture needle according to claim 4 , wherein the length of the catheterization portion is 8-10 cm. 10 . 10 . The deep vein catheterization needle according to claim 1 , wherein the needle core has a model of 16G-20G. 11 .

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