Blood taking needle capable of being connected with open type remaining needle

Abstract

The invention relates to the technical field of blood sampling devices, and provides a blood taking needle capable of being connected with an open type remaining needle. The blood taking needle comprises a catheter, a tail needle is connected to the tail end of the catheter, a screw cylinder is fixed to the front end of the catheter and communicated with the catheter, and internal threads are formed in the inner wall of the screw cylinder and used for being in threaded connection with the tail end of the open type remaining needle. According to the blood taking needle, a puncture needle part is omitted, and the screw cylinder is connected with the remaining needle, so that the pain burden of a patient is reduced, and the risk of accidental puncture is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of blood sampling devices, and in particular relates to a blood collection needle that can be connected to an open indwelling needle. Background Art

[0002] A venous blood collection needle is a device used to collect blood samples during medical examinations; it includes a transparent hose, a puncture needle at the front end of the hose is used to puncture blood vessels, and the rear end of the hose is connected to the tail needle. The tail needle is wrapped by a rubber hose and covered with a needle cap, which is used to pierce a vacuum blood collection tube and use the negative pressure in the tube to draw blood into the tube. If a conventional venous blood collection needle is used for puncture of a patient who already has an indwelling needle, it will increase the patient's pain burden and there may be a risk of accidental puncture during puncture. Summary of the invention

[0003] The main purpose of this application is to provide a blood collection needle that can be connected to an open indwelling needle without a puncture needle. Based on this, this application adopts the following technical solutions:

[0004] A blood collection needle connectable to an open indwelling needle comprises a catheter, the tail end of which is connected to a tail needle, a screw barrel is fixed to the front end of the catheter, the screw barrel is communicated with the catheter, and the inner wall of the screw barrel is provided with an internal thread for threaded connection with the tail end of the open indwelling needle.

[0005] In at least one embodiment, the tail needle sleeve has a removable needle cap.

[0006] In at least one embodiment, a connecting seat is provided between the tail needle and the tail end of the catheter, which includes a main pipe coaxially fixedly connected to the end of the catheter and a branch pipe forked from the side wall of the main pipe. The tail needle is installed at the port of the main pipe, and the port of the branch pipe is provided with an internal thread for threaded connection with the heparin cap.

[0007] In at least one embodiment, the connector further comprises a heparin cap connected to the port of the branch tube.

[0008] In at least one embodiment, the port of the screw barrel is also covered with a removable sealing cap.

[0009] In at least one embodiment, the outer wall of the screw barrel and the inner wall of the sealing cap are threadedly connected.

[0010] In at least one embodiment, a convex ring is provided on the outside of the bottom end of the screw barrel, the convex ring has a notch for disconnecting it, and an annular groove is provided on the side wall of the screw barrel below the convex ring; a convex tooth is provided on the inner wall of the port of the sealing cap, and the port is fixedly connected to one end of an elastic connecting belt on the outside, and a sleeve is fixedly connected to the other end of the connecting belt, and the sleeve is rotatably nested in the annular groove, and the convex tooth can be stuck under the convex ring when the sealing cap is sleeved on the screw barrel, and can also pass through the notch when the sealing cap is rotated, so as to remove the sealing cap. Furthermore, an elastic strip is fixed on the connecting belt along the length direction.

[0011] The blood collection needle provided in the present application can achieve the following beneficial effects: 1. The puncture needle part is eliminated and replaced with a screw barrel connected to an indwelling needle, which reduces the patient's pain burden and avoids the risk of accidental puncture; 2. The tail end structure is changed to a Y-shaped structure, one end is used to connect the blood collection tube, and the other end is connected to the heparin cap, which is conducive to the connection of the indwelling needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] One or more embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0013] Figure 1 This is a schematic diagram of the structure of a blood collection needle shown in one embodiment of the present application;

[0014] Figure 2 This is a schematic diagram of the structure of a blood collection needle shown in another embodiment of the present application;

[0015] Figure 3 for Figure 2 A three-dimensional view of the screw barrel and the sealing cap of the embodiment;

[0016] Figure 4 for Figure 2 A front view of the screw barrel and the sealing cap of the embodiment;

[0017] Figure 5 for Figure 2 A top view of the screw barrel and the sealing cap of the embodiment.

[0018] The numbers in the figure are: 10, catheter; 20, tail needle; 30, screw barrel; 31, convex ring; 32, notch; 33, annular groove; 40, needle cap; 50, connecting seat; 51, main pipe; 52, branch pipe; 53, heparin cap; 60, sealing cap; 61, convex teeth; 62, connecting belt; 63, ring; 64, elastic strip. DETAILED DESCRIPTION

[0019] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0020] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0021] like Figure 1 As shown, the blood collection needle of this embodiment that can be connected to an open-type indwelling needle includes a catheter 10, a tail needle 20 is connected to the tail end of the catheter 10, a screw barrel 30 is fixed to the front end of the catheter 10, the screw barrel 30 is connected to the catheter 10, and the inner wall of the screw barrel 30 is provided with an internal thread for threaded connection with the tail end of the open-type indwelling needle. The catheter 10 is selected as a transparent hose. The tail needle 20 is covered with a removable needle cap 40; plastic is provided around the bottom of the tail needle 20, and the needle cap 40 is also made of plastic material. The needle cap 40 can be tightly inserted into the tail needle 20 to prevent it from falling off easily.

[0022] A connecting seat 50 is provided between the tail needle 20 and the tail end of the catheter 10, which includes a main pipe 51 coaxially fixedly connected to the end of the catheter 10, and a branch pipe 52 forked from the side wall of the main pipe 51. The tail needle 20 is installed at the port of the main pipe 51, and the port of the branch pipe 52 is provided with an internal thread, and is connected to a heparin cap 53 through the internal thread. The structure of the heparin cap 53 is conventional in the art and will not be described in detail here.

[0023] In addition, the port of the screw barrel 30 is also covered with a removable sealing cap 60. The outer wall of the screw barrel 30 is threadedly connected to the inner wall of the sealing cap 60. When in use, the sealing cap 60 is removed after rotation, and the screw barrel 30 can be used to connect the tail end of the open indwelling needle.

[0024] like Figures 2 to 5 , shows a blood collection needle according to another embodiment of the present application, which is Figure 1 The biggest difference between the embodiments is the connection method between the sealing cap 60 and the screw barrel 30 .

[0025] because Figure 1The screw barrel 30 in the embodiment is provided with threads inside and outside, which will affect the strength of the screw barrel 30 and may be lost if the sealing cap 60 is not used immediately after it is removed. To this end, the present embodiment provides an improved structure and connection method, namely: a convex ring 31 is provided on the outer side of the bottom end of the screw barrel 30, and the convex ring 31 is provided with a notch 32 for disconnecting it, and an annular groove 33 is provided on the side wall of the screw barrel 30 below the convex ring 31; a convex tooth 61 is provided on the inner wall of the port of the sealing cap 60, and the port is fixedly connected to one end of an elastic connecting belt 62 on the outside, and a sleeve 63 is fixedly connected to the other end of the connecting belt 62, and the sleeve 63 is rotatably nested in the annular groove 33, and the convex tooth 61 can be stuck under the convex ring 31 when the sealing cap 60 is sleeved on the screw barrel 30, and can also pass through the notch 32 when the sealing cap 60 is rotated, so as to remove the sealing cap 60.

[0026] Since the connecting belt 62 is provided, the sealing cap 60 can be prevented from being lost after being removed. In addition to having a connecting function, the connecting belt 62 has a certain elasticity, which can provide an oblique upward pulling force when the sealing cap 60 covers the screw barrel 30, so that the convex teeth 61 and the convex ring 31 are squeezed against each other, thereby preventing the sealing cap 60 from being easily removed. Furthermore, an elastic strip 64 is fixed on the connecting belt 62 along the length direction. The elastic strip 64 can be made of the same material as the connecting belt 62, such as plastic; of course, a material with greater elasticity can also be used, but it needs to be able to be bent.

[0027] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present application should be within the protection scope of the present application.

Claims

1. A blood collection needle connectable to an open indwelling needle, comprising a catheter (10) with a tail needle (20) connected to its tail end, characterized in that: A screw barrel (30) is fixed at the front end of the catheter (10). The screw barrel (30) is in communication with the catheter (10) and has an inner wall with internal threads for being threadedly connected to the tail end of an open-type indwelling needle.

2. The blood collection needle according to claim 1, characterized in that: The tail needle (20) is covered with a removable needle cap (40).

3. The blood collection needle according to claim 1 or 2, characterized in that: A connecting seat (50) is provided between the tail needle (20) and the tail end of the catheter (10), and comprises a main pipe (51) coaxially fixedly connected to the end of the catheter (10), and a branch pipe (52) forked from the side wall of the main pipe (51). The tail needle (20) is installed at the port of the main pipe (51), and the port of the branch pipe (52) is provided with an internal thread for threaded connection with a heparin cap (53).

4. The blood collection needle according to claim 3, characterized in that: The connection seat (50) further comprises a heparin cap (53) which is connected to the port of the branch tube (52).

5. The blood collection needle according to claim 1, characterized in that: The end of the screw barrel (30) is also covered with a removable sealing cap (60).

6. The blood collection needle according to claim 5, characterized in that: The outer wall of the screw barrel (30) and the inner wall of the sealing cap (60) are threadedly connected.

7. The blood collection needle according to claim 5, characterized in that: A convex ring (31) is provided on the outer side of the bottom end of the screw barrel (30), and a notch (32) is provided on the convex ring (31) for disconnecting the screw barrel (30), and an annular groove (33) is provided on the side wall of the screw barrel (30) below the convex ring (31); a convex tooth (61) is provided on the inner wall of the port of the sealing cap (60), and the outer side of the port is fixedly connected to one end of an elastic connecting belt (62), and the other end of the connecting belt (62) is fixedly connected to a sleeve (63), and the sleeve (63) is rotatably nested in the annular groove (33). The convex tooth (61) can be stuck under the convex ring (31) when the sealing cap (60) is sleeved on the screw barrel (30), and can also pass through the notch (32) when the sealing cap (60) is rotated, so as to remove the sealing cap (60).

8. The blood collection needle according to claim 1, characterized in that: An elastic strip (64) is also fixed on the connecting belt (62) along the length direction.

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