CN116616875A - A blood vessel puncture positioning device - Google Patents

Abstract

The invention discloses a blood vessel puncture positioning device, which includes a joint locking structure, a signal generating structure and a signal processing display. The joint locking structure is used to match a puncture needle seat connected to a puncture needle. The generating structure includes a first sensor for detecting blood rushing into the puncture needle, and the signal processing display is electrically connected with the first sensor to process the signal transmitted by the first sensor and display the result. In the blood vessel puncture positioning device provided by the present invention, when the puncture needle is punctured into the blood vessel, the first sensor contacts the returned blood to generate a signal, and the signal is transmitted to the signal processing display to display the result after processing, and the position of the needle tip of the puncture needle can be known by observing the display result, which can Eliminate the factors of human error, the device is low in cost and easy to operate, and the medical staff can operate and use it independently after understanding the meaning of the displayed results.

Description

A blood vessel puncture positioning device

technical field

The invention relates to the technical field of medical equipment, in particular to a blood vessel puncture positioning device.

Background technique

Vascular puncture is a commonly used clinical operation. The purpose is to perform medical operations such as blood drawing, laboratory tests, blood transfusion, infusion, catheter placement for angiography, and interventional treatment. Common vascular punctures include basilic vein puncture, cephalic vein puncture, median cubital vein puncture, brachial vein puncture, femoral vein puncture, femoral artery puncture, subclavian arteriovenous puncture, and radial artery puncture. Clinically, it can quickly, easily and economically determine the position of the needle tip, avoid repeated punctures that may cause damage to blood vessels, and greatly reduce the pain and economic pressure of patients.

However, in the existing clinical blood vessel puncture process, judging whether the needle tip has entered the blood vessel and whether the entered blood vessel is a venous blood vessel or an arterial blood vessel mainly involves two methods of empirical judgment and ultrasonic positioning puncture. Judging by experience is that the medical staff judges whether the puncture enters the blood vessel by observing the blood return of the needle tube, and at the same time judges whether the puncture is a vein or an artery by observing the blood flow and blood color. This method is related to the knowledge and experience of the medical staff and is easy for new nurses. Misjudgment occurs, which requires repeated punctures, which aggravates the pain of the patient; ultrasound positioning puncture is performed by medical staff observing the positions of blood vessels and needle tips through ultrasound. This method is expensive due to expensive equipment, complicated operation, and difficult to popularize.

Contents of the invention

In order to overcome at least one defect of the above-mentioned prior art, the present invention provides a blood vessel puncture positioning device.

The technical scheme that the present invention adopts for solving its problem is:

A blood vessel puncture positioning device, comprising:

A joint locking structure, the joint locking structure is used to match the puncture needle seat connected to the puncture needle;

a signal generating structure, the signal generating structure is disposed in the puncture needle, the signal generating structure includes a first sensor for detecting blood rushing into the puncture needle; and

a signal processing display, the signal processing display is electrically connected to the first sensor to process the signal transmitted by the first sensor and display the result.

In the blood vessel puncture positioning device provided by the present invention, the joint locking structure connects the puncture needle with the signal processing display, the signal generating structure is arranged in the puncture needle, the first sensor is electrically connected with the signal processing display, and when the puncture needle punctures into a blood vessel, The first sensor touches the returned blood to generate a signal, and the signal is sent to the signal processing monitor to display the result after processing. The position of the needle tip of the puncture needle can be known by observing the displayed result, which can eliminate the factors of human error. The device is low in cost and easy to operate. Medical staff understand the display The meaning of the result can be used independently.

Further, the outer diameter of the signal generating structure is smaller than the inner diameter of the puncture needle tube of the puncture needle.

Further, the signal processing display includes a housing connected to the joint locking structure, a power supply provided in the housing and electrically connected with the first sensor to form a circuit, a signal processing module, and a signal processing module for displaying Result window.

Further, the connector locking structure is provided with a first Luer interface, and the puncture needle hub is provided with a second Luer interface.

Further, the distance between the first sensor and the needle tip of the puncture needle tube of the puncture needle is greater than 1 mm.

Further, the first sensor includes a conductive first electrode and a second electrode, and the first electrode and the second electrode communicate with each other through a blood return connection.

Further, the first sensor includes a conductive first electrode and a second electrode connected to the puncture needle tube of the puncture needle, and the first electrode and the puncture needle tube communicate with each other through a blood return connection.

Further, the first sensor includes a conductive first electrode and a second electrode connected to the puncture needle tube of the puncture needle;

The connection between the joint locking structure and the puncture needle seat is provided with an exhaust groove for discharging gas in the puncture needle during puncture;

A signal processing component is arranged between the second electrode and the signal processing module, so that the puncture needle tube and the first electrode form a capacitor.

Further, the signal generating structure further includes a second sensor arranged in the puncture needle, and one end of the second sensor is connected to the signal processing display;

The first sensor includes a conductive first electrode and a second electrode, the first electrode is electrically connected to the other end of the second sensor, and the first electrode and the second electrode are connected through a blood return to make the circuit connected.

Further, the signal generating structure further includes a second sensor arranged in the puncture needle, and one end of the second sensor is connected to the signal processing display;

The first sensor includes a conductive first electrode and a second electrode connected to the puncture needle tube of the puncture needle, the first electrode is electrically connected to the other end of the second sensor, and the first electrode is connected to the puncture needle tube. The puncture needle tube communicates with the circuit through the blood return connection.

Further, the signal generating structure further includes a second sensor arranged in the puncture needle;

The signal processing display is electrically connected to the second sensor, and both the first sensor and the second sensor are pressure sensors.

Further, the signal processing display includes a housing connected to the joint locking structure, a power supply provided in the housing and electrically connected with the first sensor to form a circuit, and a signal processing device for processing pressure electrical signals. Components and a display screen for displaying signal processing results; the first sensor is a pressure sensor.

Further, the signal processing display includes a housing connected to the joint locking structure, a power supply provided in the housing and electrically connected to the first sensor to form a circuit, and an indicator light for displaying signal processing results ;

The first sensor includes a conductive first electrode and a second electrode, and the first electrode communicates with the puncture needle tube of the puncture needle through a blood return connection.

In summary, the blood vessel puncture positioning device of the present invention has the following technical effects:

The joint locking structure connects the puncture needle with the signal processing display, the signal generating structure is set in the puncture needle, the first sensor is electrically connected with the signal processing display, when the puncture needle punctures into the blood vessel, the first sensor touches the return blood to generate a signal, the signal After being transmitted to the signal processing monitor for processing, the result is displayed. Observing the displayed result can know the position of the needle tip of the puncture needle, which can eliminate the factors of human judgment error. The device is low in cost and easy to operate. The medical staff can operate independently after understanding the meaning of the displayed result; the confirmation is accurate After the puncture is completed, the joint locking structure is separated from the puncture needle, and the signal generating structure is taken out from the puncture needle, so that the puncture needle can complete subsequent medical operations.

Other technical effects of the present invention are pointed out in combination with specific structures in the description.

Description of drawings

Fig. 1 is a structural schematic diagram of a blood vessel puncture positioning device of the present invention;

Fig. 2 is a structural schematic diagram of Embodiment 1 of the blood vessel puncture positioning device of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is a schematic structural diagram of Embodiment 2 of the blood vessel puncture positioning device of the present invention;

Fig. 5 is an enlarged view of part B in Fig. 4;

Fig. 6 is an enlarged view of part C in Fig. 4;

Fig. 7 is a schematic structural view of Embodiment 3 of the blood vessel puncture positioning device of the present invention;

Fig. 8 is an enlarged view of part D in Fig. 7;

Fig. 9 is an enlarged view of part E in Fig. 7;

Fig. 10 is a schematic structural view of Embodiment 4 of the blood vessel puncture positioning device of the present invention;

Figure 11 is an enlarged view of part F in Figure 10;

Fig. 12 is a schematic structural view of Embodiment 5 of the blood vessel puncture positioning device of the present invention;

Fig. 13 is an enlarged view of part G in Fig. 12;

Figure 14 is an enlarged view of part H in Figure 12;

Fig. 15 is a schematic structural view of Embodiment 6 of the blood vessel puncture positioning device of the present invention;

Fig. 16 is an enlarged view of part J in Fig. 15;

Fig. 17 is a schematic structural view of Embodiment 7 of the blood vessel puncture positioning device of the present invention;

Figure 18 is an enlarged view of part K in Figure 17;

Fig. 19 is a schematic structural view of Embodiment 8 of the blood vessel puncture positioning device of the present invention;

Fig. 20 is an enlarged view of L portion in Fig. 19 .

Among them, the meanings of the reference signs are explained:

1. Puncture needle; 11. Puncture needle holder; 12. Puncture needle tube; 2. Connector locking structure; 21. Exhaust groove; 3. Signal generating structure; 31. First sensor; 311. First electrode; 312. No. Two electrodes; 32, second sensor; 4, signal processing display; 41, housing; 42, power supply; 43, signal processing module; 431, triode; 432, resistance; 433, switch; 44, indication window; 45, signal Disposal components; 5. Signal transmission lines.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or positional relationship. Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

1-20, the present invention provides a blood vessel puncture positioning device, including a joint locking structure 2, a signal generating structure 3 and a signal processing display 4, the joint locking structure is used to match the puncture needle holder 11 connected to the puncture needle 1 , the signal generating structure 3 is arranged in the puncture needle 1, the signal generating structure 3 includes a first sensor 31 for detecting blood rushing into the puncture needle 1, and the signal processing display 4 is electrically connected with the first sensor 31 to process the first sensor 31 When the puncture needle 1 punctures into the blood vessel, the first sensor 31 touches the return blood to generate a signal, and the signal is transmitted to the signal processing display to process and display the result. The position of the needle tip of the puncture needle 1 can be known by observing the display result. Eliminate the factors of human error, the device is low in cost and easy to operate, and the medical staff can operate and use it independently after understanding the meaning of the displayed results.

The puncture needle 1 includes a puncture needle base 11 and a puncture needle tube 12 connected with the puncture needle base 11 . Here, the puncture needle 1 refers to a general term for needles used in puncture operations in medical operations.

The signal processing display 4 includes but not limited to noise removal, stabilization, signal amplification and other functions, and the processed signal presents the result to the user through the indicator light/display screen in the indication window 44 .

Specifically, the outer diameter of the signal generating structure 3 is smaller than the inner diameter of the puncture needle tube 12 so as to return blood. Similarly, the outer diameter of the signal transmission line 5 electrically connecting the signal generating structure 3 and the signal processing display 4 is also smaller than the inner diameter of the puncture needle tube 12 . The greater the distance between the signal generating structure 3 and the outer diameter of the signal transmission line 5 and the inner diameter of the puncture needle tube 12, the better.

Further, the signal processing display 4 includes a housing 41 connected to the joint locking structure 2, a power supply 42 arranged in the housing 41 and electrically connected to the first sensor 31 to form a circuit, a signal processing module 43, and a display signal processing module 43. Result indication window 44 . The voltage of the power supply 42 is 1.5-36VDC human body safety voltage, and several resistors 432 with proper resistance values for adjusting the voltage and current will be set in the circuit as required. One end of the power supply 42 is provided with a switch 433 .

As a preferred embodiment, the puncture needle base 11 is provided with a first Luer interface, and the joint locking structure 2 is provided with a second Luer interface. After the puncture needle base 11 is connected with the joint locking structure 2, the puncture needle base 11 ends are sealed, and a dead space is formed in the puncture needle 1 after puncture.

Specifically, the distance between the signal generating structure 3 and the needle tip of the puncture needle tube 12 is greater than 1 mm, so as to avoid the sensor being affected by a small amount of blood in the capillaries during the puncture.

In the present invention, the signal generating structure is placed in the puncture needle 1. When the needle tip penetrates into the blood vessel, the signal generating structure 3 will respond to the blood pressure and blood or the displacement of the needle tip. Diode/indicating light/display screen etc. are used as indicating window 44 to show the position of puncture needle point, when the light-emitting diode of display blood vessel or indicator light are on, or when the display screen shows the information of entering blood vessel, then represent needle point in blood vessel; When light-emitting diode or indicator light If it is not on, or the display screen displays the message that it is not in the blood vessel, it means that the needle tip is not in the blood vessel; further, when the light-emitting diode or indicator light showing the artery is on, or the display screen shows the artery information, it means that the needle tip is already in the artery, indicating that the needle tip is not in the blood vessel. When the light is off or not in the artery is displayed, it means that the needle tip is not in the artery. The device solves the influence of human factors and does not need to use expensive B-ultrasound equipment. The puncture method is completely consistent with the conventional puncture technique. Just identify the signal meanings displayed in the indicator window. After the puncture is completed, the signal generating structure 3 and the signal processing display can be separated from the puncture needle 1 so that the puncture needle 1 can complete subsequent operations.

Under the above basic structure, the device of the present invention enumerates the following specific embodiments:

Embodiment one

Referring to FIG. 2 and FIG. 3 , the first sensor 31 includes a conductive first electrode 311 and a second electrode 312 , and the first electrode 311 and the second electrode 312 communicate with each other through a blood return connection. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal.

Working principle: Press the switch to puncture, when the puncture needle 1 enters the blood vessel, the blood in the blood vessel will enter the inner cavity of the puncture needle tube 12 under the action of blood pressure, and compress the air in the puncture needle tube 12 and the puncture needle seat 11, When the blood flows through a certain distance and touches the first electrode 311 and the second electrode 312 at the same time, due to the conductivity of the blood, the first electrode 311 and the second electrode 312 are turned on to form a microcurrent, and the microcurrent signal passes through the signal processing module 43 The middle triode 431 is amplified, and the amplified signal emits light through the light-emitting diode/indicator in the indicator window 44. When the light-emitting diode/indicator is on, it means that the needle tip has entered the blood vessel. to judge whether the needle tip enters the blood vessel. When the puncture needle 1 withdraws from the blood vessel, the compressed air in the puncture needle holder 11 will push the blood in the puncture needle tube 12 to flow out, resulting in no blood contact between the first electrode 311 and the second electrode 312, forming an open circuit, light emitting diode/indication When the light is off, the medical staff can judge that the needle tip has withdrawn from the blood vessel.

Embodiment two

Referring to FIGS. 4-6 , the first sensor 31 includes a conductive first electrode 311 and a second electrode 312 connected to the puncture needle tube 12 , and the first electrode 311 and the puncture needle tube 12 communicate with each other through a blood return connection. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal.

The structure of the second embodiment is similar to that of the first embodiment, except that the second electrode 312 of the first embodiment is in contact with the conductive stainless steel puncture needle tube 12, so that the puncture needle tube 12 becomes an electrode, as shown in FIG. 6 . When the puncture needle 1 enters the blood vessel, the blood contacts the puncture needle tube 12 and flows into the inner cavity of the puncture needle tube 12 to contact the first electrode 311. The blood conduction between the puncture needle tube 12 and the first electrode 311 forms a conduction current. Signal processing and display are the same as those in Embodiment 1.

Embodiment three

Referring to Figures 7-9, the first sensor 31 includes a conductive first electrode 311 and a second electrode 312 connected to the puncture needle tube 12; the connection between the joint locking structure 2 and the puncture needle base 11 is provided for discharging the puncture during puncture. The gas exhaust groove 21 in the needle 1; the signal processing component 45 is arranged between the second electrode 312 and the signal processing module 43, so that the puncture needle tube 12 and the first electrode 311 form a capacitor. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal. Signal processing components 45 are used to process capacitive signals. The setting of the exhaust groove 21 makes the joint locking structure 3 not completely sealed after being connected with the puncture needle hub 11, so as to avoid the formation of dead space and affect the return of blood after puncture.

Working principle: Press the switch 433 , and a capacitor is formed between the puncture needle tube 12 and the first electrode 311 . When the puncture needle 1 enters the blood vessel, the blood in the blood vessel will enter the gap between the first electrode 311 and the inner cavity of the puncture needle tube 12 under the action of blood pressure and flow to the inner cavity of the puncture needle holder 11. According to the principle of the capacitor, due to the air Different from the dielectric constant of blood, the dielectric constant of the capacitor changes, resulting in a change of the electrical signal, the electrical signal is processed by the signal processing component 45, and finally amplified by the triode 431, and the amplified signal is passed through the light-emitting diode/indicator The light emits light, and when the light-emitting diode/indicator light is on, it means that the needle tip has entered the blood vessel, and the medical staff can judge whether the needle point has entered the blood vessel according to the light-emitting diode/indicator light of the indicator window 44 on or off.

Embodiment four

10-11, the signal generating structure 3 also includes a second sensor 32 arranged in the puncture needle 1, and one end of the second sensor 32 is connected to the signal processing display 4; the first sensor 31 includes a conductive first electrode 311 and The second electrode 312, the first electrode 311 is electrically connected to the other end of the second sensor 32, and the first electrode 311 and the second electrode 312 communicate with each other through a blood return connection. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal.

Since Embodiment 1, Embodiment 2 and Embodiment 3 cannot distinguish whether the puncture is into an artery or a vein, this embodiment adds a second sensor 32 on the basis of Embodiment 1. The second sensor 32 is a pressure sensor, and the measured pressure signal reaches the signal processing module 43 after being processed by the signal processing component 45 . Since the venous pressure is normally less than 2KPa, and the arterial pressure is normally greater than 8KPa, the pressure to start the second sensor 32 is designed to be 5kpa, that is, the second sensor 32 does not start to work when punctured into the vein, and starts to work when punctured into the artery. The signal of the second sensor 32 is transmitted to the signal processing display 4 for processing and displaying, so that the user can quickly identify it. A separate signal processing module 43 and an indication window 44 for displaying arterial pressure may be provided for the second sensor 32 (the working principle is described with this circuit structure).

Working principle: press the switch 433 to puncture, when the puncture needle 1 enters the blood vessel, the blood in the blood vessel will enter the inner cavity of the puncture needle tube 12 under the action of blood pressure and compress the air in the puncture needle tube 12 and the puncture needle seat 11, and the blood will When flowing through a certain distance and touching the first electrode 311 and the second electrode 312 at the same time, due to the conductivity of the blood, the first electrode 311 and the second electrode 312 are turned on to form a microcurrent, and the microcurrent signal passes through the signal for judging whether it has entered the blood vessel The triode 431 of the processing module 43 is amplified, and the amplified signal emits light through the light-emitting diode/indicator. When the light-emitting diode/indicator is on, it indicates that the needle tip has entered the blood vessel. / indicator light is on and off to judge whether the needle tip enters the blood vessel. When the needle tip punctures into a vein, because the venous pressure is small, it is not enough to activate the second sensor 32, so the indicator window 44 for judging whether it has entered a blood vessel is bright and the indicator window 44 for judging whether it has entered an artery is not bright. When the puncture enters the artery, because the arterial pressure can normally reach more than 8KPa, the second sensor 32 is activated and is in a working state to form an electrical signal. The signal is first converted into an electrical signal that can be processed by the triode 431) and the triode 431, and the amplified arterial signal makes the light-emitting diode/indicator light of the indication window 44 that judges whether to enter the artery glow. Therefore, when the two indicating windows 44 are bright at the same time, it means that the puncture needle 1 has entered the artery. When the puncture needle 1 withdraws from the blood vessel, the compressed air in the puncture needle holder 11 will push the blood in the puncture needle tube 12 to flow out, resulting in no blood contact between the first electrode 311 and the second electrode 312, forming an open circuit, indicating the opening of the window 44 The light-emitting diode/indicator is off, and the medical staff can judge that the needle tip has withdrawn from the blood vessel.

Embodiment five

12-14, the signal generating structure 3 also includes a second sensor 32 arranged in the puncture needle 1, and one end of the second sensor 32 is connected to the signal processing display 4; the first sensor 31 includes a conductive first electrode 311 and The second electrode 312 connected to the puncture needle tube 12, the first electrode 311 is electrically connected to the other end of the second sensor 32, and the first electrode 311 and the puncture needle tube 12 communicate with each other through the blood return connection. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal.

In the fifth embodiment, the second sensor 32 is added on the basis of the second embodiment. The second sensor 32 is a pressure sensor, and the measured pressure signal reaches the signal processing module 43 after being processed by the signal processing component 45 . Since the venous pressure is normally less than 2KPa, and the arterial pressure is normally greater than 8KPa, the pressure to start the second sensor 32 is designed to be 5kpa, that is, the second sensor 32 does not start to work when punctured into the vein, and starts to work when punctured into the artery. The signal of the second sensor 32 is transmitted to the signal processing display 4 for processing and displaying, so that the user can quickly identify it. A separate signal processing module 43 and an indication window 44 for displaying arterial pressure may be provided for the second sensor 32 (the working principle is described with this circuit structure).

Working principle: the working principle of the indicator window 44 for observing and judging whether it has entered a blood vessel is the same as that of the second embodiment, and the working principle of the indicator window 44 for observing and judging whether it has entered an artery is the same as that of the fourth embodiment. When the indicator light of the indicating window 44 for judging whether to enter a blood vessel is off, it indicates that the blood vessel has not been penetrated; when the indicating window 44 for judging whether entering a blood vessel is on and the indicating window 44 for judging whether entering an artery is off, it means that the puncture has entered a venous blood vessel; When the indication window 44 for judging whether to enter a blood vessel and the indication window 44 for judging whether to enter an artery are on at the same time, it means that the arteries have entered. If both indicator windows 44 are off, it means that the needle tip has withdrawn from the blood vessel.

Embodiment six

15 and 16, the signal generating structure 3 also includes a second sensor 32 arranged in the puncture needle 1; the signal processing display 4 is electrically connected to the second sensor 32, and both the first sensor 31 and the second sensor 32 are pressure sensors. sensor. The signal processing module 43 includes a transistor 431 for amplifying signals, and a bias circuit can be provided at its base to reduce the voltage or current required to respond to the signal. The designed start-up pressure of the first sensor 31 is 0.4kpa, and the designed start-up pressure of the second sensor 32 is 5kpa. The pressure signal measured by the pressure sensor. A separate signal processing module 43 and an indication window 44 for displaying arterial pressure may be provided for the second sensor 32 .

When the puncture enters the vein, under the effect of venous blood pressure, the first sensor 31 starts to work and generates an electrical signal. 44 display. When the puncture enters the artery, the second sensor 32 starts to work and generates an electrical signal. After the telecommunication signal is processed by the signal processing component 45 and then reaches the signal processing module 43, it is displayed in the indication window 44 for judging whether it has entered the artery.

Embodiment seven

17 and 18, the signal processing display 4 includes a housing 41 connected to the joint locking structure 2 and a power supply 42 arranged in the housing 41 and electrically connected to the first sensor 31 to form a circuit for processing pressure electrical signals. The signal processing components 45 and the display screen for displaying the signal processing results; the first sensor 31 is a pressure sensor.

When the puncture enters the blood vessel, under the action of blood pressure, the first sensor 31 monitors the blood pressure in real time, and converts the blood pressure signal into an electrical signal. After transmission and signal processing, the blood pressure and its changes are displayed on the display screen. The operator can Judging whether it is a vein or an artery according to the displayed blood pressure.

Embodiment eight

19 and 20, the signal processing display 4 includes a housing 41 connected to the joint locking structure 2, a power supply 42 disposed in the housing 41 and electrically connected to the first sensor 31 to form a circuit, and used to display signal processing results The indicator light; the first sensor 31 includes a conductive first electrode 311 and a second electrode 312, and the first electrode 311 and the puncture needle tube 12 communicate with each other through the blood return connection.

The structure of the eighth embodiment is similar to that of the first embodiment, the difference is that the components (transistors) for signal amplification in the signal processing display 4 are removed, and the light-emitting diode or indicator light triggered by a micro-current is used to light up, and the first electrode 31 and The current signal collected by the second electrode 32 is displayed directly through the light emitting diode or the indicator light.

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (13)

1. A vascular puncture positioning device, comprising:

the connector locking structure (2), the said connector locking structure (2) is used for matching and connecting the puncture needle stand (11) of the puncture needle (1);

a signal generating structure (3), the signal generating structure (3) comprising a first sensor (31) for detecting a blood influx into the puncture needle (1); and

and a signal processing display (4), wherein the signal processing display (4) is electrically connected with the first sensor (31) so as to process the signal transmitted by the first sensor (31) and display the result.

2. The vascular puncture positioning device according to claim 1, wherein the outer diameter of the signal generating structure (3) is smaller than the inner diameter of the puncture needle tube (12) of the puncture needle (1).

3. The vascular puncture positioning device according to claim 2, wherein the signal processing display (4) comprises a housing (41) connected to the connector locking structure (2), and a power supply (42) arranged in the housing (41) and electrically connected to the first sensor (31) to form a circuit, a signal processing module (43) and an indication window (44) for displaying a signal result.

4. A vascular puncture positioning device according to claim 2 or 3, characterized in that the connector locking structure (2) is provided with a first luer and the puncture needle holder (11) is provided with a second luer.

5. The vascular puncture positioning device according to claim 4, wherein the first sensor (31) is spaced from the tip of the puncture needle tube (12) by more than 1mm.

6. The vascular puncture positioning device according to any of claims 1-3 and 5, wherein the first sensor (31) comprises a first electrode (311) and a second electrode (312) which are electrically conductive, the first electrode (311) and the second electrode (312) being in electrical communication by means of a return blood connection.

7. The vascular puncture positioning device according to any of claims 1-3 and 5, characterized in that the first sensor (31) comprises a first electrically conductive electrode (311) and a second electrode (312) connected to the puncture needle tube (12) of the puncture needle (1), the first electrode (311) and the puncture needle tube (12) being in electrical communication by means of a return blood connection.

8. The vascular puncture positioning device according to any of claims 1-3 and 5, characterized in that the first sensor (31) comprises a first electrode (311) being electrically conductive and a second electrode (312) being connected to the puncture needle tube (12) of the puncture needle (1);

an exhaust groove (21) for exhausting gas in the puncture needle (1) during puncture is arranged at the joint of the joint locking structure (2) and the puncture needle seat (11);

a signal processing component (45) is arranged between the second electrode (312) and the signal processing module (43) so that the puncture needle tube (12) and the first electrode (311) form a capacitor.

9. The vascular puncture positioning device according to any of the claims 1-3 and 5, wherein the signal generating structure (3) further comprises a second sensor (32) arranged inside the puncture needle (1), one end of the second sensor (32) being connected to the signal processing display (4);

the first sensor (31) comprises a first electrode (311) and a second electrode (312) which can be electrically conducted, the first electrode (311) is electrically connected with the other end of the second sensor (32), and the first electrode (311) and the second electrode (312) are connected through blood return to enable a circuit to be communicated.

10. The vascular puncture positioning device according to any of the claims 1-3 and 5, wherein the signal generating structure (3) further comprises a second sensor (32) arranged inside the puncture needle (1), one end of the second sensor (32) being connected to the signal processing display (4);

the first sensor (31) comprises a first conductive electrode (311) and a second electrode (312) connected with the puncture needle tube (12), the first electrode (311) is electrically connected with the other end of the second sensor (32), and the first electrode (311) is communicated with the puncture needle tube (12) of the puncture needle (1) through blood return connection to enable a circuit to be communicated.

11. The vascular puncture positioning device according to any of the claims 1-3 and 5, characterized in that the signal generating structure (3) further comprises a second sensor (32) arranged inside the puncture needle (1);

the signal processing display (4) is electrically connected with the second sensor (32), and the first sensor (31) and the second sensor (32) are both pressure sensors.

12. The vascular puncture positioning device according to claim 1 or 2, wherein the signal processing display (4) comprises a housing (41) connected to the joint locking structure (2), a power supply (42) provided in the housing (41) and electrically connected to the first sensor (31) to form a circuit, a signal processing component (45) for processing the pressure electric signal, and a display screen for displaying the result of the signal processing; the first sensor (31) is a pressure sensor.

13. The vascular puncture positioning device according to claim 1 or 2, wherein the signal processing display (4) comprises a housing (41) connected to the joint locking structure (2), and a power supply (42) provided in the housing (41) and electrically connected to the first sensor (31) to form a circuit, and an indicator lamp for displaying a signal processing result;

the first sensor (31) comprises a first electrode (311) and a second electrode (312) which can be electrically conducted, and the first electrode (311) is communicated with a puncture needle tube (12) of the puncture needle (1) through blood return connection.