CN205031651U - Malleation lasts administering means and needle, central venous catheter are kept somewhere to vein - Google Patents

Abstract

The utility model belongs to the field of medical equipment, and relates to a positive pressure continuous liquid supply device, which comprises a positive pressure liquid storage bag and a joint. And the drug outlet, the drug outlet is connected with the joint through a restrictor tube. The positive pressure continuous liquid feeding device can provide continuous positive pressure and realize continuous liquid feeding. The infusion time of the liquid (that is, the liquid administration time) is within the planned time range; the device is suitable for medical devices that require intravenous indwelling, and has a wide range of applications. The utility model also relates to an intravenous indwelling needle and a central venous catheter with the above-mentioned positive pressure continuous liquid supply device. The advantages.

Description

Positive pressure continuous fluid supply device and intravenous indwelling needle, central venous catheter

technical field

The utility model relates to a positive pressure continuous liquid supply device, a venous indwelling needle and a central venous catheter, belonging to the field of medical equipment.

Background technique

Disposable venous indwelling needles and central venous catheters used clinically in clinical units of various domestic medical institutions require venous indwelling.

Taking the traditional venous indwelling needle as an example, the working process of the venous indwelling medical device is explained as follows: the traditional venous indwelling needle mainly consists of a heparin cap, a protective cap, an infusion tee, a PVC hose, a water-stop clip, a puncture needle seat, and an indwelling needle. It consists of a cannula seat, a hemostat, a puncture needle, an indwelling needle sleeve, and an indwelling needle sheath. The disposable venous indwelling needle uses the sharpness of the puncture needle to smoothly puncture the skin and enter the vein, and then pull out the puncture needle. After the venipuncture is successful, the trocar is left in the vein for infusion treatment, which effectively improves the infusion. Improve the quality of treatment and increase the comfort of patients during infusion; the cannula of the trocar is relatively soft and should not damage blood vessels, reduce the incidence of phlebitis and infusion complications, and ensure safer infusion; the tube must be sealed after the infusion every day, It can be reserved until the next day to continue the intravenous infusion, and the tube must be flushed before continuing the intravenous infusion on the next day; the trocar can be kept for no more than 72 hours, thereby reducing the pain of daily venipuncture and improving the patient satisfaction rate; intravenous indwelling trocar It can improve the efficiency of nursing work, reduce needle stick injuries, and protect the occupational safety of medical staff.

It can be known from the above that the tube sealing operation is required after the infusion is completed to avoid tube blockage caused by blood coagulation in the tube. However, in the actual application process, blood often enters the indwelling needle sleeve due to patient movement and blood penetration. It is easy to cause blood to form embolism in the blocked blood vessel during circulation, which will bring great harm to the patient and even threaten life. At present, in order to prevent blood coagulation, patients can be injected with heparin sodium and other anticoagulant drugs, but patients who are allergic to heparin sodium and other anticoagulant drugs cannot use it; normal saline can also be used for locking the tube, but the locking time is limited and requires Tube sealing is performed many times. In addition, improper operation by nurses can easily cause tube blockage. Now, there are positive pressure joint devices on the market, and technologies such as placing fine fibers in the tube for drainage, etc., but the positive pressure formed by these is one-time, and it is completely released within 10 seconds. It cannot provide continuous positive pressure, and it is still easy. Blocking the tube, how to solve the coagulation in the tube to prevent the generation of blood clots is a difficult problem to be solved at present.

Utility model content

According to the deficiencies in the prior art above, the technical problem to be solved by the utility model is: to provide a positive pressure continuous liquid supply device capable of providing continuous positive pressure; Reflux, anti-thrombotic and seal-free, flush-free intravenous indwelling needles and central venous catheters.

The positive pressure continuous liquid supply device described in the utility model includes a positive pressure liquid storage bag and a joint. The positive pressure liquid storage bag is made of elastic material. The positive pressure liquid storage bag is provided with a one-way drug feeding port and a drug outlet. The drug outlet is connected with the joint through a restrictor tube.

In the above-mentioned positive pressure continuous liquid feeding device, the one-way drug feeding port can use a conventional one-way valve to realize one-way drug feeding. liquid, and prevent the backflow of liquid medicine from the one-way dosing port. The working process and principle of the positive pressure continuous liquid supply device are as follows:

When the liquid medicine (which can be normal saline or other liquid medicine) is injected into the positive pressure liquid storage bag from the one-way dosing port, under the pressure of the liquid medicine, the positive pressure liquid storage bag expands, the internal liquid storage space increases, and the medicine liquid The liquid is stored in the positive pressure liquid storage bag. Since the positive pressure liquid storage bag is made of elastic material and has a one-way dosing port, after stopping the dosing from the one-way dosing port, the positive pressure liquid storage bag will be on its own. Under the action of elasticity, it shrinks to provide continuous positive pressure to the drug outlet and realize continuous liquid supply. During the liquid supply process, the output of the liquid medicine is limited by the restrictor tube to ensure that the liquid medicine is injected through the positive pressure liquid storage bag The infusion time (that is, the time of administration) is within the planned time range.

The utility model also includes a shell, in which the positive pressure liquid storage bag and the current limiting tube are installed, so as to effectively protect the positive pressure liquid storage bag and the current limiting tube. Preferably, the outer shell is transparent or translucent, which is convenient for observing the state of the positive pressure liquid storage bag.

The inner diameter of the above-mentioned restrictor tube is less than 0.1 mm, and its principle is the same as that of the capillary glass tube in the glass thermometer, thereby limiting the output speed and output volume of the liquid medicine.

The above-mentioned joint is an external conical joint, through which the external conical joint can be directly matched with the positive pressure joints of traditional venous indwelling needles, central venous catheters and other medical devices that require venous indwelling.

In order to protect the entire positive pressure continuous liquid supply device, in the utility model, a first protective cap is provided corresponding to the one-way drug feeding port, and a second protective cap is provided corresponding to the joint.

The intravenous indwelling needle described in the utility model includes an infusion tee, and the joint of the above-mentioned positive pressure continuous liquid supply device is installed at the positive pressure interface of the infusion tee. Compared with ordinary indwelling needles, after the infusion is completed on the first day, as long as the positive pressure continuous infusion device is filled with physiological saline and connected to the venous indwelling needle, the positive pressure continuous infusion device will continue to infuse fluid (during continuous During the liquid supply process, make sure that the water stop clip cannot be closed), and there is no need to seal and flush the tube during the entire indwelling process of the intravenous indwelling needle, which can prevent blood backflow and thrombosis. The venous indwelling needle described in the utility model can also stably and slowly release the medicinal liquid, prevent the formation of blood clots in the indwelling tube, avoid the phenomenon of tube blockage, thereby prolonging the service life of the indwelling needle, and also avoiding the formation of blood clots from rushing into the patient's body Cause secondary damage to the patient in the blood circulation system.

The central venous catheter described in the utility model includes an infusion tee, and the joint of the above-mentioned positive pressure continuous liquid supply device is installed at the positive pressure interface of the infusion tee. Its working principle and process are the same as the above-mentioned intravenous indwelling needle with positive pressure continuous liquid supply device.

Compared with the prior art, the utility model has the following beneficial effects:

The positive pressure continuous liquid supply device described in the utility model can provide continuous positive pressure and realize continuous liquid supply. The infusion time (i.e., the liquid administration time) of the liquid storage bag injected into the liquid medicine is within the planned time range; the intravenous indwelling needle and the central venous catheter described in the utility model are equipped with the above-mentioned positive pressure continuous liquid supply device, so they also have the above-mentioned effect, and can prevent blood reflux, anti-thrombosis, and avoid sealing and flushing of the tube.

Description of drawings

Fig. 1 is a structural schematic diagram of a positive pressure continuous liquid supply device;

Fig. 2 is a schematic structural view of an intravenous indwelling needle with a positive pressure continuous liquid supply device.

In the figure: 1. One-way drug feeding port; 2. One-way valve; 3. Positive pressure liquid storage bag; 4. Drug outlet; 5. Flow limiting tube; 6. Joint; 7. Second protective cap; Shell; 9. First protective cap; 10. Positive pressure interface; 11. Infusion tee; 12. Water stop clamp.

detailed description

Embodiments of the utility model are further described below in conjunction with the accompanying drawings:

As shown in Figure 1, the positive pressure continuous liquid supply device includes a positive pressure liquid storage bag 3 and a joint 6. The positive pressure liquid storage bag 3 is made of elastic material. The drug outlet 4 is connected with the joint 6 through the restrictor tube 5 .

In this example:

In order to effectively protect the positive pressure liquid storage bag 3 and the current limiting tube 5, a casing 8 is also added, and the positive pressure liquid storage bag 3 and the current limiting tube 5 are installed in the casing 8; the casing 8 is transparent or translucent, which is convenient Observe the state of the positive pressure liquid storage bag 3; the inner diameter of the restrictor tube 5 is less than 0.1 mm to limit the output speed and output volume of the medicinal liquid; the joint 6 is an external conical joint, through which the traditional venous indwelling needle can be directly connected , central venous catheters and other medical devices that require intravenous indwelling; the corresponding one-way drug feeding port 1 is provided with a first protective cap 9, and the corresponding joint 6 is provided with a second protective cap 7, so that the entire positive pressure is sustained The liquid supply device plays a protective role.

In this embodiment, the one-way drug feeding port 1 adopts a conventional one-way valve 2 to realize the one-way drug feeding. When in use, it cooperates with instruments such as syringes to fill the positive pressure liquid storage bag 3 with liquid medicine through the one-way drug feeding port 1. And prevent the medicine liquid from flowing back from the one-way medicine feeding port 1. The working process and principle of the present embodiment are as follows:

When injecting liquid medicine (which can be physiological saline or other liquid medicine) from the one-way medicine feeding port 1 into the positive pressure liquid storage bag 3, under the action of the pressure of the liquid medicine, the positive pressure liquid storage bag 3 expands and the internal liquid storage space increases. Large, the liquid medicine is stored in the positive pressure liquid storage bag 3. Since the positive pressure liquid storage bag 3 is made of elastic material and has a one-way drug feeding port 1, after stopping the drug feeding from the one-way drug feeding port 1, the positive pressure liquid storage bag 3 is The pressure storage bag 3 will shrink under the action of its own elasticity, so as to provide continuous positive pressure to the drug outlet 4, and realize continuous liquid supply. It is ensured that the infusion time (that is, the liquid administration time) of injecting the medicinal liquid through the positive pressure liquid storage bag 3 is within the planned time range.

As shown in Figure 2, the intravenous indwelling needle consists of the above-mentioned positive pressure continuous liquid supply device, infusion tee 11, PVC hose, water stop clamp 12, puncture needle seat, indwelling needle sleeve seat, hemostat, puncture needle, indwelling needle It consists of a cannula and an indwelling needle sheath, and the joint 6 of the above-mentioned positive pressure continuous liquid supply device is installed at the positive pressure interface 10 of the infusion tee 11 .

Compared with ordinary indwelling needles, after the infusion is completed on the first day, as long as the positive pressure continuous infusion device is filled with physiological saline and connected to the venous indwelling needle, the positive pressure continuous infusion device will continue to infuse fluid (during continuous During the liquid feeding process, ensure that the water stop clamp 12 cannot be closed), and there is no need to seal and flush the tube during the entire indwelling process of the venous indwelling needle, so that blood backflow and thrombosis can be prevented. The venous indwelling needle described in the utility model can also stably and slowly release the medicinal liquid, prevent the formation of blood clots in the indwelling tube, avoid the phenomenon of tube blockage, thereby prolonging the service life of the indwelling needle, and also avoiding the formation of blood clots from rushing into the patient's body Cause secondary damage to the patient in the blood circulation system.

The central venous catheter described in the utility model includes an infusion tee, and the joint of the above-mentioned positive pressure continuous liquid supply device is installed at the positive pressure interface of the infusion tee. Its working principle and process are the same as the above-mentioned intravenous indwelling needle with positive pressure continuous liquid supply device.

Similarly, for other medical devices that require intravenous indwelling, it is only necessary to fill the positive pressure continuous liquid supply device with physiological saline and then connect it to the corresponding device. The positive pressure continuous liquid supply device will continue to supply liquid. During the entire indwelling process, there is no need to lock and flush the tube, which can prevent blood reflux and thrombosis. The utility model can also use an electric pump to replace the positive pressure liquid storage bag 3 to provide continuous positive pressure, so as to realize the purpose of the utility model.

Claims (9)

1. A positive pressure continuous liquid supply device, characterized in that: it includes a positive pressure liquid storage bag (3) and a joint (6), the positive pressure liquid storage bag (3) is made of elastic material, and the positive pressure liquid storage bag ( 3) A one-way drug feeding port (1) and a drug outlet (4) are arranged on the top, and the drug outlet (4) is connected to the joint (6) through a restrictor tube (5). 2. The positive pressure continuous liquid supply device according to claim 1, characterized in that: it also includes a casing (8), and the positive pressure liquid storage bag (3) and the restrictor tube (5) are installed in the casing (8) . 3. The positive pressure continuous liquid supply device according to claim 2, characterized in that: the outer shell is transparent or translucent. 4. The positive pressure continuous liquid supply device according to claim 1, 2 or 3, characterized in that: the inner diameter of the restrictor tube (5) is less than 0.1mm. 5. The positive pressure continuous liquid supply device according to claim 1, 2 or 3, characterized in that: the joint (6) is an external conical joint. 6. The positive pressure continuous liquid supply device according to claim 1, 2 or 3, characterized in that: a first protective cap (9) is provided corresponding to the one-way drug feeding port (1). 7. The positive pressure continuous liquid supply device according to claim 1, 2 or 3, characterized in that a second protective cap (7) is provided corresponding to the joint (6). 8. An intravenous indwelling needle with the positive pressure continuous liquid supply device according to any one of claims 1 to 7, comprising an infusion tee (11), characterized in that: the connector of the positive pressure continuous liquid supply device ( 6) Installed at the positive pressure interface (10) of the infusion tee (11). 9. A central venous catheter with the positive pressure continuous liquid supply device according to any one of claims 1 to 7, including an infusion tee, characterized in that: the joint of the positive pressure continuous liquid supply device is installed in the infusion three through the positive pressure port.