CN209122371U - A vascular puncture device - Google Patents

Abstract

The utility model discloses a blood vessel puncturing device in the field of medical instruments, comprising a puncture needle needle tube, a peripheral catheter, a catheter seat and a needle tube seat, the front end of the puncture needle needle tube forms a puncture needle, and the front end of the needle tube seat is coaxially connected to a catheter The front end of the catheter seat is coaxially connected to the tail end of the peripheral catheter, the puncture needle needle tube coaxially penetrates the needle tube seat, the catheter seat and the peripheral catheter in sequence; the puncture needle passes through the outer periphery The front end of the catheter; the outer peripheral wall of the front end of the outer peripheral catheter is provided with a number of notches passing through the outer peripheral wall of the outer peripheral catheter; a cavity is formed between the catheter seat and the radial direction of the puncture needle tube. The technical effect is that it can divert arterial blood and venous blood, help the operator to timely and effectively judge whether the puncture needle has reached or punctured the femoral artery, and prevent the occurrence of medical accidents.

Description

A vascular puncture device

technical field

The utility model relates to a blood vessel puncturing device in the field of medical instruments.

Background technique

The vascular puncture device is mainly used in the femoral vein puncture operation. It is suitable for patients who are difficult to puncture the peripheral superficial vein but need blood samples or intravenous infusion. It is a commonly used deep vein catheter in clinical practice.

The femoral puncture site is densely covered with blood vessels, and the femoral vein is hidden behind the femoral artery. Therefore, when the femoral vein puncture is performed, the puncture needle in the puncture device can easily reach or even pierce the human femoral artery before reaching the femoral vein, causing massive hemorrhage. , resulting in a life-threatening risk to the patient.

Generally speaking, the doctor judges whether the puncture needle has reached the femoral vein by observing the color of the blood in the puncture needle, but if the puncture needle has penetrated the femoral artery and reached the femoral vein, the blood flowing out of the puncture needle is only venous blood. Failure to identify the occurrence of such a situation in a timely manner and continue treatment may have serious consequences. This is because when the puncture needle reaches the femoral vein, if it does not penetrate the femoral artery, only venous blood will flow back; if it penetrates the femoral artery, the blood in the femoral artery will also flow back, and the backflowing blood will appear venous blood and arterial blood. The phenomenon that exists at the same time makes it difficult for the operator to distinguish.

Utility model content

The purpose of the present utility model is to overcome the deficiencies of the prior art and provide a blood vessel puncturing device, which can help the operator to timely and effectively judge whether the puncture needle has reached or punctured the femoral artery.

A technical solution to achieve the above purpose is: a blood vessel puncturing device, comprising a puncture needle needle tube, a peripheral catheter, a catheter holder and a needle tube holder, the front end of the puncture needle needle tube forms a puncture needle,

The front end of the needle tube seat is coaxially connected to the catheter seat, the front end of the catheter seat is coaxially connected to the tail end of the peripheral catheter, and the puncture needle needle tube coaxially penetrates the needle tube seat, the catheter seat and the peripheral catheter in turn. ; The puncture needle passes through the front end of the peripheral catheter;

The outer peripheral wall of the front end of the outer peripheral conduit is provided with a plurality of notches passing through the outer peripheral wall of the outer peripheral conduit;

A cavity is formed between the catheter holder and the radial direction of the puncture needle tube.

Further, the radial inner side of the front end of the catheter holder is provided with an annular pressure sleeve that is coaxial with the catheter holder and is connected to the inner peripheral wall of the catheter holder. The pressure sleeve is connected to the inner peripheral wall of the catheter holder. An annular groove for fixing the tail end of the outer peripheral conduit is formed therebetween.

Still further, the shape of the front end of the catheter holder and the pressure sleeve are both funnel-shaped, and the shape of the annular groove is also funnel-shaped.

Further, the catheter hub is transparent, or is provided with a transparent observation window.

Further, the catheter hub and the needle hub are detachable.

Further, the number of the slots is three.

The technical scheme of a blood vessel puncturing device of the present invention is adopted, which includes a puncture needle needle tube, a peripheral catheter, a catheter holder and a needle tube holder, the front end of the puncture needle needle tube forms a puncture needle, and the front end of the needle tube holder is coaxially connected to the catheter The front end of the catheter holder is coaxially connected to the tail end of the peripheral catheter, and the puncture needle needle tube coaxially penetrates the needle tube holder, the catheter holder and the peripheral catheter in sequence; the puncture needle passes through the outer periphery. The front end of the catheter; the outer peripheral wall of the front end of the outer peripheral catheter is provided with a number of notches passing through the outer peripheral wall of the outer peripheral catheter; a cavity is formed between the catheter seat and the radial direction of the puncture needle tube. The technical effect is that it can help the operator to timely and effectively judge whether the puncture needle has reached or punctured the femoral artery.

Description of drawings

FIG. 1 is a schematic structural diagram of a blood vessel puncturing device according to the present invention.

FIG. 2 is an enlarged schematic view of part A of FIG. 1 .

Detailed ways

Please refer to Fig. 1, in order to better understand the technical solution of the present utility model, the inventor of the present utility model will describe in detail below through specific embodiments and in conjunction with the accompanying drawings:

Referring to FIG. 1 , a blood vessel puncturing device of the present invention is mainly used for puncturing the femoral vein for blood collection or intravenous injection. The front end of the puncture needle tube 1 forms a puncture needle 11 .

The front end of the needle hub 5 is detachably connected to the tail end of the catheter hub 4 coaxially. The front end of the catheter holder 4 is coaxially connected to the rear end of the peripheral catheter 2 . The puncture needle tube 1 coaxially passes through the needle tube seat 5 , the catheter seat 4 and the peripheral catheter 2 in sequence. The peripheral wall of the front end of the peripheral catheter 2 is provided with a number of notches 21 that penetrate the outer peripheral wall of the peripheral catheter 2. When the operator punctures the human femoral vein, he can pass the notches 21 to observe the puncture needle tube 1 in time. The color of the blood inside determines whether the puncture needle 11 has reached the femoral artery by mistake.

The radial inner side of the front end of the catheter holder 4 is provided with an annular pressure sleeve 3 coaxial with the catheter holder 4 and connected to the inner peripheral wall of the catheter holder 4. The outer peripheral wall of the pressure sleeve 3 and the inner peripheral wall of the catheter holder 4 are formed for The annular groove 41 at the end of the fixed peripheral conduit 2 is fixed. The function of the compression sleeve 3 is to compress the tail end of the peripheral catheter 2 and the catheter holder 4 . The outer peripheral wall of the rear end of the outer peripheral conduit 2 is in close contact with the inner peripheral wall of the catheter holder 4 , and the inner peripheral wall of the rear end of the peripheral conduit 2 is in close contact with the outer peripheral wall of the pressure sleeve 3 . A cavity 42 is formed between the catheter hub 4 and the radial direction of the puncture needle needle tube 1 . If the puncture needle 11 has penetrated the femoral artery and reached the femoral vein, since the notch 21 remains in the femoral artery, arterial blood can enter the radial direction between the puncture needle needle tube 1 and the peripheral catheter 2 from the notch 21, and then enter the hollow space. The cavity 42 is formed, and the venous blood still flows into the puncture needle needle tube 1, so the flow channels of the venous blood and the arterial blood are different, and the notch 21 also plays the role of shunting the arterial blood and the venous blood.

In this embodiment, both the front end of the catheter holder 4 and the pressure sleeve 3 are designed to be funnel-shaped. Correspondingly, the annular groove 41 between the pressure sleeve 3 and the catheter holder 4 for fixing the tail end of the outer peripheral catheter 2 is also designed to be funnel-shaped. The purpose of this design is to avoid puncturing the tail end of the peripheral catheter 2 when the puncture needle 11 is inserted, and to increase the connection strength of the connection between the catheter hub 4 and the peripheral catheter 2 .

In this embodiment, the catheter holder 4 is transparent, or has a transparent observation window, so that the operator can observe the color of the blood in the cavity 42 between the catheter holder 4 and the puncture needle tube 1, so as to judge the size of the front end of the puncture needle tube 1. Whether the puncture needle 11 has penetrated the femoral artery.

The vessel puncturing device has three notches 21 penetrating the peripheral wall 2 of the peripheral catheter 2 on the peripheral wall of the front end of the peripheral catheter 2, so as to allow the operator to observe more quickly whether the puncture needle 11 has reached by mistake during puncturing femoral artery to prevent perforation of the patient's femoral artery. If the puncture needle reaches the femoral artery, the blood flowing out from the puncture needle tube 1 should be bright red arterial blood; if the puncture needle reaches the femoral vein normally, the blood flowing out from the puncture needle tube 1 is only dark red venous blood; 11 has penetrated the femoral artery and reached the femoral vein. Due to the shunting effect of the notch 21, the venous blood in the puncture needle cannula 1 is dark red, and appears in the cavity 42 between the catheter holder 4 and the puncture needle cannula 1. Bright red arterial blood.

The working process of the blood vessel puncturing device in this embodiment is:

Step 1: The patient is placed in a supine position, and the pulsating femoral artery is felt just below the midpoint of the inguinal ligament, and its inner side is the femoral vein. After fixing the femoral vein with the left hand, the puncture needle 11 is inserted vertically or at an angle of 30-30 to the skin. 40° penetration.

Step 2: Observe whether there is blood returning in the needle tube 1 of the puncture needle. If there is no blood returning, slowly withdraw the puncture needle 11 and change the direction and angle of the needle insertion.

Step 3: If there is blood returning in the puncture needle tube 1, observe the color of the blood. If it is all dark red venous blood, the puncture is successful; if the blood flowing out of the puncture needle tube 1 is bright red arterial blood, the puncture needle 11 has reached the thigh. At this time, the puncture needle 11 should be pulled out, and the puncture point should be pressed for a few minutes until there is no bleeding; Bright red arterial blood indicates that the puncture needle 11 has penetrated the femoral artery. At this time, the puncture needle 11 should be pulled out and treated in time.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Changes and modifications of the embodiments will fall within the scope of the claims of the present invention.

Claims (6)

1. a kind of vascular puncture device, including puncture needle tubing, peripheral catheters, catheter block and needle tubing seat, the puncture needle tubing Front end formed puncture needle, it is characterised in that:

The coaxially connected catheter block in front end of the needle tubing seat, the tail of the coaxially connected peripheral catheters in the front end of the catheter block End, the puncture needle tubing sequentially coaxially run through the needle tubing seat, catheter block and the peripheral catheters；The puncture needle is pierced by institute State the front end of peripheral catheters；

The periphery wall of the peripheral catheters front end is equipped with the notch of several periphery walls through the peripheral catheters；

Cavity is formed between the catheter block and the radial direction for puncturing needle tubing.

2. a kind of vascular puncture device according to claim 1, it is characterised in that: the diameter of the front end of the catheter block is inside Side is equipped with coaxial with the catheter block, connects the annular pressing sleeve of the internal perisporium of the catheter block, the pressing sleeve is led with described The annular groove for fixing the peripheral catheters tail end is formed between the internal perisporium of tube socket.

3. a kind of vascular puncture device according to claim 2, it is characterised in that: the front end of the catheter block and the pressure The shape of set is infundibulate, and the shape of the annular groove is also infundibulate.

4. a kind of vascular puncture device according to claim 1, it is characterised in that: the catheter block is transparent, or is set There is transparent watch window.

5. a kind of vascular puncture device according to claim 1, it is characterised in that: the catheter block and the needle tubing seat it Between be dismountable.

6. a kind of vascular puncture device according to claim 1, it is characterised in that: the quantity of the notch is three.