Central vein puncture needle
By adding an L-shaped pressure measuring tube structure to the syringe of the central venipuncture needle, the problems of inconvenience in the prior art and the inability to reuse the pressure measuring needle are solved, and the effect of rapid judgment and reuse is achieved, and the convenience and safety of operation are improved.
Patent Information
- Application Number
- CN202421687292.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing central venipuncture needles have inconvenient pressure measurement and the equipped manipuncture needle cannot be reused, which increases the puncture steps and consumable consumption.
A central venous puncture needle was designed to reduce the puncture steps by adding an L-shaped pressure measuring tube structure to the syringe barrel, so as to quickly determine whether to accurately puncture the venous blood vessels and reuse them during the same puncture process.
Reduces puncture steps, improves the convenience and safety of operation, avoids the risk of iatrogenic contamination, and reduces consumable consumption.
Smart Images
Figure CN222899246U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a central venous puncture needle, belonging to the technical field of medical devices. Background Art
[0002] After clinicians perform the central venous puncture step by the Seldinger method and puncture to insert the guide wire, if they cannot judge whether the venous blood vessel is accurately punctured based on personal experience such as the color of the blood, or due to the large variation in the patient's own blood vessels or large blood vessel capacity (especially for patients using a ventilator, the venous blood has an increased oxygen content, making the venous blood appear bright red, so even experienced clinicians may misjudge), it is more reliable to use the disposable pressure measuring needle equipped in the central venous puncture consumable kit to judge whether the artery is accidentally punctured. However, this pressure measuring needle can only be used once, and once it is confirmed that the puncture needle has indeed entered the artery, the extremely high pressure of the arterial blood will cause a large amount of blood to splash, which is more likely to cause iatrogenic contamination. In addition, after the guide wire is withdrawn, the operator needs to firmly hold the puncture needle with one hand to prevent the position of the puncture needle from shifting and accidentally entering the carotid artery close to the internal jugular vein. At the same time, use the other hand to insert the pressure measuring needle at the tail of the puncture needle. After the pressure measurement experiment is confirmed, the pressure measuring needle is removed to decide whether to continue or stop the puncture operation. The more operation steps there are in these intermediate links, the more likely the needle tip of the puncture needle is to shift, resulting in puncture failure, especially because the patient's condition is different and the degree of cooperation between the doctor and the patient is different, the puncture difficulty varies from patient to patient. Moreover, this supporting pressure measuring needle is disposable, and if necessary, in order to use the pressure measuring needle again, the consumption of the consumables of the venous puncture kit needs to be increased again. Since every step and detail of the central venous puncture operation must ensure safety or clearly determine that the guide wire or the central venous catheter is indeed in the venous blood vessel under ultrasonic guidance, once any step fails, the consequences may cause certain damage to the patient, and in severe cases, it may even endanger the patient's life safety. Summary of the Invention
[0003] The purpose of the utility model is to solve the technical problems such as inconvenient pressure measurement of the central venous puncture needle and the non-reusable pressure measuring needle equipped. The utility model provides a central venous puncture needle. By adding an L-shaped pressure measuring tube structure, this puncture needle can reduce the puncture steps, quickly judge whether the venous blood vessel is accurately punctured, and can be reused during the same puncture process.
[0004] In order to achieve the above purpose, the utility model provides a central venous puncture needle, including a puncture needle tip, a syringe barrel and a piston push rod assembly connected in a sliding manner. One end of the syringe barrel is a connection end for the puncture needle tip, provided with a connection head for connecting the puncture needle tip. An L-shaped pressure measuring tube is arranged on the barrel wall of the syringe barrel close to the connection end of the puncture needle tip. One end of the L-shaped pressure measuring tube is communicated with the syringe barrel, and a tube cap for closing the tube orifice is arranged at the other end of the tube orifice.
[0005] Preferably, a filter screen is provided near the nozzle of the L-shaped pressure measuring tube.
[0006] Preferably, the filter screen is made of stainless steel, nylon or polymer material.
[0007] Preferably, it further includes a guiding wire, and a hollow steel core for the guiding wire to pass through is sleeved on the central axis of the piston push rod assembly.
[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0009] A central venous puncture needle of the present utility model is modified on the basis of the existing central venous puncture needle structure. By adding a design of an L-shaped pressure measuring tube to the syringe barrel, the puncture steps can be reduced (mainly reducing the steps of the operator alternately pulling out the guiding wire and inserting the pressure measuring needle to judge whether the artery is misentered), which is convenient for quickly judging whether the vein blood vessel is accurately punctured. At the same time, the setting of the filter screen can avoid the risk of iatrogenic contamination caused by blood splashing when the artery is misentered, and the puncture needle can be reused during the same puncture process. Description of the Drawings
[0010] Figure 1 is a schematic structural diagram of a central venous puncture needle of the present utility model;
[0011] Figure 2 is a schematic diagram after puncturing with the central venous puncture needle of the present utility model according to the Seldinger method and inserting the guiding wire;
[0012] Reference numerals: 1. puncture needle tip; 2. syringe barrel; 3. piston push rod assembly; 4. L-shaped pressure measuring tube; 4a. filter screen; 4b. tube cap; 5. hollow steel core; 6. guiding wire. Detailed Embodiments
[0013] To make the present utility model more obvious and understandable, the preferred embodiments are described in detail below in conjunction with the drawings.
[0014] Embodiment
[0015] This embodiment provides a central venous puncture needle, as Figures 1-2As shown, it includes a puncture needle 1, a syringe 2 and a piston push rod assembly 3. One end of the syringe 2 is the connection end of the puncture needle 1, and is provided with a connector for connecting the puncture needle 1. The piston push rod assembly 3 is slidably connected to the syringe 2, and its length is greater than the syringe 2, so that its handle end is exposed outside the syringe, so that the piston push rod assembly 3 can slide in the syringe 2 through a push-pull operation. Similar to a syringe, a hollow steel core 5 for guiding a steel wire 6 to pass through is sleeved on the central axis of the piston push rod assembly 3. An L-shaped pressure measuring tube 4 is provided on the wall of the syringe 2 near the connection end of the puncture needle. One end of the L-shaped pressure measuring tube 4 is connected to the syringe 2, and the other end is provided with a filter screen 4a near the tube mouth, and a tube cover 4b for closing the tube mouth is provided on the tube mouth; the aperture of the filter screen 4a can be set at 50-200μm. The setting of the filter screen 4a not only allows the syringe 2 to communicate with the atmosphere, but also can try to avoid rapid splashing of arterial blood when it enters the artery by mistake.
[0016] like Figure 2 As shown, when puncture is performed according to the Seldinger method and the guide wire 6 is inserted, the piston part of the piston push rod assembly 3 is already higher than the L-shaped pressure measuring tube 4 in the syringe 3. At this time, there is no need to follow the conventional operation: pull out the guide wire 6, and then insert a special pressure measuring needle to determine whether it has mistakenly entered the artery (especially for patients using a ventilator, whose venous blood looks bright red due to the increased oxygen content, and a pressure measuring needle is needed to make a judgment). At this time, the guide wire 6 can be kept in place to avoid displacement of the puncture needle. Just use the other hand that does not hold the needle to gently open the tube cover 4b of the L-shaped pressure measuring tube 4. If there is blood gushing out quickly, it can be determined as arterial blood. If it is venous blood, the blood will return slowly and no rapid gushing imaging will occur. Therefore, it can be quickly determined whether it is arterial blood. At the same time, the setting of the filter 4a can reduce the risk of arterial blood splashing when it mistakenly enters the artery. After the judgment is completed, the tube cover 4b can be covered to close the tube mouth. If the puncture needle needs to be used again, the injection syringe and the puncture needle body of the central venous puncture needle can be rinsed with sterile saline, and the L-shaped pressure measuring tube can also be rinsed and reused.
[0017] The above-mentioned implementation cases are only preferred implementation cases of the present utility model, and are not any formal and substantial limitations of the present utility model. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present utility model, and these improvements and supplements should also be regarded as the scope of protection of the present utility model.
Claims
1. A central venous puncture needle, characterized in that: It includes a puncture needle, a slidably connected syringe and a piston push rod assembly, one end of the syringe is the puncture needle connection end, and is provided with a connector for connecting the puncture needle. An L-shaped pressure measuring tube is provided on the wall of the syringe near the puncture needle connection end. One end of the L-shaped pressure measuring tube is connected to the syringe, and a tube cover for closing the tube opening is provided on the tube opening at the other end.
2. The central venous puncture needle according to claim 1, characterized in that: The L-shaped pressure measuring tube is provided with a filter screen near the tube opening.
3. The central venous puncture needle according to claim 1, characterized in that: It also includes a guide wire. The central axis of the piston push rod assembly is sleeved with a hollow steel core for the guide wire to pass through.