CN209916016U - Needle is kept somewhere to vein that can repeat blood sampling - Google Patents

Abstract

The utility model discloses a vein indwelling needle capable of repeatedly taking blood, which comprises a soft needle, a heparin cap joint and a blood return and coagulation preventing needle core; the outer surface of the soft needle is provided with a first anticoagulation coating, the soft needle is of a tapered structure with the outer diameter gradually reduced, the axial center of the soft needle is provided with a channel, and the outer side of the large end of the soft needle is provided with an anti-retraction needle wing; the heparin cap joint is connected with the large end of the soft needle; the blood return preventing and coagulation preventing needle core comprises a holding part and a puncture needle, wherein a second anticoagulation coating is arranged on the outer surface of the puncture needle, the puncture needle is vertically arranged on one side of the holding part, the puncture needle penetrates through a heparin cap joint and is positioned in a channel on the soft needle, and the holding part is left outside the heparin cap joint. The utility model shortens the exposed length of the remaining needle, and reduces the amount of flushing and blood discarding to the maximum extent; effectively preventing the blood from coagulating; the retraction of the soft needle remained in the body is avoided; the puncture and blood drawing can be repeated for a plurality of times; the blood backflow is prevented to cause blood coagulation and thrombosis; good stability, strong comfort, convenient use and simple structure.

Description

A venous indwelling needle for repeatable blood collection

technical field

The utility model relates to a venous indwelling needle capable of repeated blood sampling, belonging to the field of indwelling needles.

Background technique

Clinically, many patients need to repeatedly draw blood samples, which not only increases the chance of vascular damage, but also increases the pain of patients and the workload of nurses. Although indwelling PICC, arterial catheter, CVC, etc., can be used for blood drawing, but due to the long exposed pipeline, it is necessary to use a sealing liquid such as normal saline and dilute heparin to seal the tube. When blood is drawn again, in order to prevent the residual sealing fluid in the pipeline from affecting the test results of the blood sample, 1-2 ml of blood needs to be drawn and discarded, which is a loss to the patient, and most of the patients are unwilling to cooperate.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned defects in the prior art, the present invention provides a venous indwelling needle capable of repeating blood collection.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is as follows:

A venous indwelling needle for repeatable blood collection, comprising a soft needle, a heparin cap joint and an anti-blood-return and anti-coagulation needle core; the outer surface of the soft needle is provided with a first anti-coagulation coating, and the soft needle is a gradually decreasing outer diameter. Retractable structure, the large end of the soft needle with the larger outer diameter is the large end, and the end with the small outer diameter is the small end, the soft needle is provided with a channel in the axial center, and the outer side of the large end of the soft needle is provided with an anti-retraction needle wing; the heparin cap joint is connected On the big end of the soft needle; the anti-blood-return and anti-coagulation needle core includes a holding part and a puncture needle, the outer surface of the puncture needle is provided with a second anti-coagulation coating, the puncture needle is vertically arranged on one side of the holding part, and the puncture needle passes through over the heparin cap connector and within the channel on the soft needle, leaving the grip on the outside of the heparin cap connector.

When in use, the soft needle is driven by the puncture needle to pierce the venous blood vessel together (the piercing depth is about the distance from the small end of the soft needle to the anti-retraction needle wing), and the part left outside the human body is removed with sterile tape. Fixed, when blood collection is required, pull out the anti-blood-return and anti-coagulation needle core, insert the syringe through the heparin cap connector and insert it into the channel of the soft needle for blood collection. The heparin cap connector is inserted into the channel of the soft needle.

The above-mentioned venous indwelling needle shortens the exposed length of the indwelling needle and minimizes the amount of flushing and discarding blood; the first anticoagulation coating on the outer surface of the soft needle and the second anticoagulant coating on the puncture needle are arranged Effectively prevent blood coagulation; the setting of the anti-retraction needle wing avoids the retraction of the soft needle indwelling in the body; the setting of the heparin cap joint (that is, the existing heparin cap) can repeat the puncture for blood drawing; The anti-blood-return and anti-coagulation needle core is inserted into the channel of the soft needle through the heparin cap joint after each blood draw, preventing the blood from flowing back and causing coagulation into thrombus. In order to pollute the blood, the puncture needle on the anti-blood-return anti-coagulation needle core is one-time use and needs to be replaced every time it is pulled out.

To save costs, the puncture needle is movably connected to the handle. In this way, only the puncture needle needs to be replaced after each use.

For the convenience of use, the puncture needle is screwed on the central position of one side of the grip.

In order to facilitate the extraction of the anti-blood-return anti-coagulation needle core, a pull ring is provided on the side of the grip portion opposite to the puncture needle.

As another preferred solution of the present application, in order to facilitate the extraction of the anti-blood-return and anti-coagulation needle core, the periphery of the side where the puncture needle is provided on the grip portion is provided with an arc-shaped chamfer.

For ease of use, the cross-section of the grip portion is circular.

During puncture, the puncture needle should extend 1-2mm from the small end of the soft needle. After the puncture, it is necessary to ensure that the anti-blood-return needle core does not extend out of the small end of the soft needle, so as to prevent the patient from puncturing the blood vessel with the protruding tip during activity.

In order to play a better protective role and at the same time be convenient to use, a baffle is arranged along the periphery of one side where the puncture needle is arranged on the grip portion, and the baffle is located on the periphery of the side wall of the heparin cap joint.

For better protection, preferably, the baffle is movably connected to the side wall of the heparin cap joint. The inner side wall of the movable connection finger baffle is connected with the outer side wall of the heparin cap joint, and can move relatively.

In order to facilitate use and ensure the anti-retraction effect at the same time, there are two anti-retraction needle wings, which are relatively arranged on the outside of the large end of the hose.

In order to further avoid blood coagulation, a third anticoagulant coating is provided on the side of the grip portion where the puncture needle is provided.

The anticoagulant coating of the present application can be prepared by using the existing anticoagulant materials. For details, please refer to the prior art (for example, refer to the patents or patent applications with application numbers of 201310700680.3, 201710603446.7, 201210147263.6, etc.). , methods, etc. are not improved, as long as the anticoagulant effect can be achieved.

The technologies not mentioned in the present invention refer to the prior art.

The utility model of the venous indwelling needle for repeated blood collection shortens the exposed length of the indwelling needle and reduces the amount of flushing and discarding blood to the greatest extent; the first anticoagulation coating on the outer surface of the soft needle and the second anticoagulant on the puncture needle The setting of the coagulation coating can effectively prevent the blood from coagulating; the setting of the anti-retraction needle wing avoids the retraction of the soft needle indwelling in the body; the setting of the heparin cap joint can repeat the puncture and blood drawing for many times; After each blood draw, the blood anti-coagulation needle core is inserted into the channel of the soft needle through the heparin cap joint, preventing blood from flowing back and causing coagulation into thrombus; it has good stability, strong comfort, easy use, and simple and convenient structure. Preparation, suitable for promotion.

Description of drawings

Fig. 1 is the venous indwelling needle structure schematic diagram one (perspective view) of the utility model that can repeatedly collect blood;

Fig. 2 is the schematic diagram of the structure of the anti-blood-return anti-coagulation needle core in Fig. 1;

Fig. 3 is the second structural schematic diagram (perspective view) of the venous indwelling needle for repeatable blood collection of the present invention;

Fig. 4 is a schematic diagram three (perspective view) of the structure of the venous indwelling needle for repeatable blood collection of the present invention;

In the figure, 1 is the soft needle, 2 is the heparin cap joint, 3 is the grip, 4 is the puncture needle, 5 is the anti-retraction needle wing, 6 is the big end of the soft needle, 7 is the small end of the soft needle, 8 For the pull ring, 9 is the baffle.

Detailed ways

In order to better understand the present utility model, the contents of the present utility model are further explained below in conjunction with the embodiments, but the contents of the present utility model are not limited to the following embodiments.

Example 1

As shown in the figure, a venous indwelling needle for repeatable blood collection includes a soft needle, a heparin cap joint and an anti-blood-return and anti-coagulation needle core; the outer surface of the soft needle is provided with a first anti-coagulation coating, and the outer diameter of the soft needle is The tapered structure gradually decreases. The large end of the soft needle with the larger outer diameter is the large end, and the end with the small outer diameter is the small end. There is a channel in the axial center of the soft needle, and the outer side of the large end of the soft needle is provided with an anti-retraction needle wing. ; The heparin cap joint is connected to the big end of the soft needle; the anti-blood-return and anti-coagulation needle core includes a holding part and a puncture needle, the outer surface of the puncture needle is provided with a second anti-coagulation coating, and the puncture needle is perpendicular to the holding part and set On one side of the grip, the puncture needle passes through the heparin cap connector and is located in the channel on the soft needle, and the grip remains outside the heparin cap connector.

When in use, the soft needle is driven by the puncture needle to pierce the venous blood vessel together, and the part left outside the human body is fixed with sterile tape. Pass the heparin cap joint into the channel of the soft needle for blood collection, and after the blood collection is completed, insert the new anti-blood-return anti-coagulation needle core through the heparin cap joint into the channel of the soft needle.

The above-mentioned venous indwelling needle shortens the exposed length of the indwelling needle and minimizes the amount of flushing and discarding blood; the first anticoagulation coating on the outer surface of the soft needle and the second anticoagulant coating on the puncture needle are arranged Effectively prevent blood coagulation; the setting of the anti-retraction needle wing avoids the retraction of the soft needle indwelling in the body; the setting of the heparin cap joint can repeat the puncture and blood drawing for many times; After the blood is drawn, the heparin cap joint is pierced into the channel of the soft needle to prevent the blood from flowing back and causing coagulation into a thrombus. In order to pollute the blood, the puncture needle on the anti-blood-return anti-coagulation needle core is one-time use and needs to be replaced every time it is pulled out.

Example 2

On the basis of Embodiment 1, further improvements are made as follows: in order to save costs, the puncture needle is movably connected to the grip portion. In this way, only the puncture needle needs to be replaced after each use.

Example 3

On the basis of Embodiment 2, the following improvements are further made: for the convenience of use, the puncture needle is threadedly connected to the central position on one side of the gripping portion, and the cross-section of the gripping portion is circular.

Example 4

On the basis of Embodiment 3, the following improvements are further made: in order to facilitate the extraction of the anti-blood-return anti-coagulation needle core, a pull ring is provided on the side of the grip portion opposite to the puncture needle.

Example 5

On the basis of Embodiment 3, the following improvements are further made: in order to facilitate the pulling out of the anti-blood-return anti-coagulation needle core, the periphery of the side where the puncture needle is provided on the grip portion is provided with an arc-shaped chamfer.

Example 6

On the basis of Example 3, the following improvements were further made: in order to play a better protective effect and at the same time be convenient to use, the grip portion is provided with a puncture needle and one side is provided with a baffle along the periphery, and the baffle is located in the heparin cap. The periphery of the joint side wall.

Example 7

On the basis of Example 6, the following improvements are further made: in order to play a better protective role, the baffle is movably connected to the side wall of the heparin cap joint.

Example 8

On the basis of Embodiment 3, the following improvements are further made: in order to facilitate use and ensure the anti-retraction effect at the same time, there are two anti-retraction needle wings, which are arranged opposite to the outside of the large end of the hose. In order to further avoid blood coagulation, a third anticoagulant coating is provided on the side of the grip portion where the puncture needle is provided.

The venous indwelling needle for repeatable blood collection in the above examples shortens the exposed length of the indwelling needle and minimizes the amount of flushing and discarding blood; the first anticoagulant coating on the outer surface of the soft needle and the second on the puncture needle. The setting of the anti-coagulation coating can effectively prevent blood coagulation; the setting of the anti-retraction needle wing avoids the retraction of the soft needle indwelling in the body; the setting of the heparin cap joint can repeat the puncture for blood drawing; The blood-returning anti-coagulation needle core is inserted into the channel of the soft needle through the heparin cap joint after each blood draw, preventing the blood from flowing back and causing coagulation into thrombus; good stability, strong comfort, convenient use, simple structure, It is convenient to prepare and suitable for promotion.

Claims (10)

1. A venous indwelling needle that can be repeatedly collected blood is characterized in that: comprising a soft needle, a heparin cap joint and an anti-blood-return and anti-coagulation needle core; the outer surface of the soft needle is provided with a first anticoagulation coating, and the soft needle is an outer A tapered structure with a gradually decreasing diameter, the large end of the soft needle with a larger outer diameter is the large end, and the end with a small outer diameter is the small end, the soft needle is provided with a channel in the axial center, and the outer side of the large end of the soft needle is provided with an anti-retraction needle Wing; the heparin cap joint is connected to the big end of the soft needle; the anti-blood-return and anti-coagulation needle core includes a grip part and a puncture needle, the outer surface of the puncture needle is provided with a second anti-coagulation coating, and the puncture needle is vertically arranged on the grip part. On one side, the puncture needle passes through the heparin cap connector and is located in the channel on the soft needle, and the grip is left outside the heparin cap connector. 2 . The venous indwelling needle for repeatable blood sampling according to claim 1 , wherein the puncture needle is movably connected to the holding portion. 3 . 3. The venous indwelling needle for repeatable blood sampling according to claim 2, wherein the puncture needle is threadedly connected to a central position on one side of the grip portion. 4. The venous indwelling needle for repeatable blood sampling according to any one of claims 1-3, wherein a pull ring is provided on the side of the grip portion opposite to the puncture needle. 5. The venous indwelling needle for repeatable blood collection according to any one of claims 1 to 3, wherein the grip portion is provided with an arc-shaped chamfer on the periphery of the side where the puncture needle is provided. 6. The venous indwelling needle for repeatable blood sampling according to any one of claims 1-3, wherein the cross-section of the grip portion is circular. 7 . The venous indwelling needle for repeatable blood collection according to claim 6 , wherein a baffle plate is provided along the periphery of one side of the puncture needle on the grip portion, and the baffle plate is located on the periphery of the side wall of the heparin cap joint. 8 . 8 . The intravenous indwelling needle for repeatable blood sampling according to claim 7 , wherein the baffle is movably connected to the side wall of the heparin cap joint. 9 . 9. The venous indwelling needle for repeatable blood sampling according to any one of claims 1-3, wherein there are two anti-retraction needle wings, which are arranged opposite to the outside of the large end of the hose. 10. The venous indwelling needle for repeatable blood collection according to any one of claims 1-3, wherein a third anticoagulant coating is provided on the side of the grip portion where the puncture needle is provided.

Images