Artery indwelling needle capable of preventing blood return

Abstract

The artery indwelling needle comprises a main body, the main body is of a three-way structure, a front-end opening is connected with a soft catheter, a rear-end opening is connected with an automatic control module, a lower-end opening is connected with an extension tube and an extension tube connector, and a single-hand clamp is arranged on the extension tube. According to the artery indwelling needle, intelligent control over the blood return amount is achieved through the automatic control module, the safety of a patient is guaranteed, and meanwhile the workload of medical workers is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to an arterial indwelling needle for preventing blood return. Background Art

[0002] Arterial catheters have been widely used in clinical practice, especially in operating rooms and critical care units. They can be used to draw blood regularly from observed patients, avoid vascular damage caused by repeated punctures, reduce patient pain, prevent cross-infection, open up an arterial "green channel" for the rescue of critically ill patients, and reduce the workload of nursing staff.

[0003] However, when inserting an arterial catheter in the prior art, medical staff need to judge whether the puncture has entered the blood vessel based on the blood return. After the arterial catheter is closed, negative pressure may be generated, causing arterial blood to flow back and blood return. When the blood return is large, the nurse needs to evaluate the color of the returned blood. If the color is light and uniform, you can consider not aspirating. If the color is darker and even blood clots can be seen, you should try to aspirate first. This has a certain impact on the safety of the patient and brings additional workload to the medical staff. Summary of the invention

[0004] In order to solve the technical problem in the prior art that arterial catheters are prone to blood backflow, which affects the safety of patients and brings additional workload to medical staff, the arterial catheter for preventing blood backflow proposed in the present invention includes a main body, which is a three-way structure, with a front end opening connected to a soft catheter, a rear end opening connected to an automatic control module, and a lower end opening connected to an extension tube, the extension tube is connected to a joint, and a one-hand clamp is provided on the extension tube.

[0005] Preferably, the main body is provided with an isolation structure between the lower end opening and the rear end opening.

[0006] Preferably, the isolation structure comprises a mounting ring, the mounting ring is arranged on the inner wall of the main body, and air-permeable and waterproof films are respectively arranged at the front and rear ends of the mounting ring.

[0007] Preferably, the breathable and waterproof film is a PTFE hydrophobic breathable membrane produced by Maiborui Biomembrane Technology Co., Ltd.

[0008] Preferably, the automatic control module includes a shell, an air hole is arranged at the bottom of the shell, a micro air pump, an air pressure sensor and a radar detection module are arranged in sequence from right to left inside the shell, and a processing circuit is arranged on the outer surface of the shell.

[0009] Preferably, an air filter is provided inside the air hole.

[0010] Preferably, the air filter is a multi-layer structure made of borosilicate glass fiber material.

[0011] Preferably, the micro air pump adopts the GS8ST micro air pump launched by CurieJet.

[0012] Preferably, the radar detection module adopts a millimeter wave radar sensor.

[0013] Preferably, the working process of the automatic control module is that the processing circuit receives data from the air pressure sensor. When the pressure data changes suddenly and the change amplitude is greater than the set threshold, the processing circuit sounds an alarm through a built-in buzzer. Next, the radar detection module is started. If the reflected signal is less than the first signal threshold, the micro air pump is turned off. If the reflected signal is greater than or equal to the first signal threshold and less than the second signal threshold, the micro air pump is started to control the liquid in the main body within an appropriate range. If the reflected signal is greater than or equal to the second signal threshold, the micro air pump is turned off.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The arterial catheter uses an automatic control module to achieve intelligent control of the amount of blood returned, which not only ensures the safety of the patient but also reduces the workload of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the arterial indwelling needle of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the automatic control module of the present invention.

[0018] In the attached drawings: 1. soft catheter, 2. main body, 3. automatic control module, 31. shell, 32. air hole, 33. micro air pump, 34. air pressure sensor, 35. radar detection module, 36. processing circuit. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, the arterial indwelling needle for preventing blood return proposed by the present invention includes a main body 2, the main body 2 is a three-way structure, the front end opening is connected to the soft catheter 1, the rear end opening is connected to the automatic control module 3, the lower end opening is connected to the extension tube 4, the extension tube 4 is connected to the joint 5, the joint 5 includes two interfaces, one interface is connected to the infusion tube, and the drug can be directly added during infusion, and the other interface can be directly connected to the infusion device, and the extension tube 4 is provided with a single-handed clamp 6, which is used to open or close the extension tube 4. The automatic control module 3 can be reused.

[0021] like Figure 1As shown, a shaping component 21 is provided at one end of the soft catheter 1 connected to the main body 2. The shaping component 21 can keep the liquid inlet of the soft catheter 1 in an open state to prevent the inner wall of the soft catheter 1 from sticking and being unable to perform normal infusion. An isolation structure 22 is provided between the lower end opening and the rear end opening of the main body 2. The isolation structure 22 includes a mounting ring 221. The mounting ring 221 is arranged on the inner wall of the main body 2. Breathable and waterproof films 222 are respectively provided at the front and rear ends of the mounting ring 221. The PTFE hydrophobic and breathable membrane produced by Maiborui Biomembrane Technology Co., Ltd. is selected to allow air to pass through the membrane freely while keeping water out of the membrane. There is no liquid between the breathable and waterproof films 222.

[0022] The automatic control module 3 is a cylindrical structure with a radius larger than the rear opening of the main body 2, and is connected to the rear opening of the main body 2 through a thread. Figure 2 As shown, the automatic control module 3 includes a shell 31. An air hole 32 is arranged at the bottom of the shell 31, and an air filter is arranged inside the air hole 32. The air filter is a multi-layer structure and is made of borosilicate glass fiber material. Inside the shell 31, a micro air pump 33, an air pressure sensor 34 and a radar detection module 35 are arranged from right to left. The micro air pump 33 adopts the GS8ST micro air pump launched by CurieJet. The radar detection module 35 is installed at the center of the shell 31 through a bracket, facing the breathable and waterproof film 222, and adopts a millimeter wave radar, specifically the XENSIV radar sensor launched by Infineon. A processing circuit 36 ​​is arranged on the outer surface of the shell 31 to control the working process of the automatic control module. The working process of the automatic control module 3 is that the processing circuit receives the data of the air pressure sensor. Due to the existence of arterial pressure, when the soft catheter enters the artery, the arterial pressure will impact the air pressure inside the main body. When the pressure data suddenly changes and the change amplitude is greater than the set threshold, it means that the soft catheter has entered the artery. The processing circuit sends an alarm through the built-in buzzer to remind the medical staff. At this time, the acupuncture is completed. Next, the radar detection module is started. Since millimeter waves are easily absorbed by liquids, the amount of liquid in the main body can be judged according to the size of the reflected signal of the radar detection module. The micro air pump can increase the air pressure inside the main body. , push the liquid in the main body back to the artery. If the reflection signal is less than the first signal threshold, it means that there is a lot of liquid in the main body and it is in the blood collection state. Turn off the micro air pump. If the reflection signal is greater than or equal to the first signal threshold and less than the second signal threshold, it means that there is not much liquid in the main body and it is in the tube sealing state. In the tube sealing state, there may be blood return in the liquid in the main body, but the liquid in the main body is greater than the set value. Start the micro air pump and control the liquid in the main body within an appropriate range. If the reflection signal is greater than or equal to the second signal threshold, it means that it is in the tube sealing state and the liquid in the main body is less than or equal to the set value. Turn off the micro air pump.

[0023] The above disclosure is only the preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the present invention. It should be pointed out that for those skilled in the art, any equivalent changes made to the scheme of the present invention without departing from the design structure and principle of the present invention are considered to be within the protection scope of the present invention.

Claims

1. An arterial indwelling needle for preventing blood return, characterized in that: The arterial indwelling needle comprises a main body, which is a three-way structure, with a front opening connected to a soft catheter, a rear opening connected to an automatic control module, a lower opening connected to an extension tube, the extension tube is connected to a joint, and a single-handed clamp is provided on the extension tube.

2. The arterial indwelling needle according to claim 1, characterized in that: The main body is provided with an isolation structure between the lower end opening and the rear end opening.

3. The arterial indwelling needle according to claim 2, characterized in that: The isolation structure comprises a mounting ring, which is arranged on the inner wall of the main body, and air-permeable and waterproof films are respectively arranged at the front and rear ends of the mounting ring.

4. The arterial indwelling needle according to claim 3, characterized in that: The breathable and waterproof film is a PTFE hydrophobic breathable film produced by Maiborui Biomembrane Technology Co., Ltd.

5. The arterial indwelling needle according to claim 1, characterized in that: The automatic control module comprises a shell, an air hole is arranged at the bottom of the shell, a micro air pump, an air pressure sensor and a radar detection module are arranged in sequence from right to left inside the shell, and a processing circuit is arranged on the outer surface of the shell.

6. The arterial indwelling needle according to claim 5, characterized in that: An air filter is arranged inside the air hole.

7. The arterial indwelling needle according to claim 6, characterized in that: The air filter is a multi-layer structure made of borosilicate glass fiber material.

8. The arterial indwelling needle according to claim 5, characterized in that: The micro air pump adopts the GS8ST micro air pump launched by CurieJet.

9. The arterial indwelling needle according to claim 5, characterized in that: The radar detection module adopts a millimeter wave radar sensor.

10. The arterial indwelling needle according to any one of claims 5 to 9, characterized in that: The working process of the automatic control module is that the processing circuit receives the data of the air pressure sensor. When the pressure data changes suddenly and the change amplitude is greater than the set threshold, the processing circuit issues an alarm through the built-in buzzer. Next, the radar detection module is started. If the reflected signal is less than the first signal threshold, the micro air pump is turned off. If the reflected signal is greater than or equal to the first signal threshold and less than the second signal threshold, the micro air pump is started to control the liquid in the main body within an appropriate range. If the reflected signal is greater than or equal to the second signal threshold, the micro air pump is turned off.

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