CN215017550U

CN215017550U - Artery and vein positioning blood sampling device

Info

Publication number: CN215017550U
Application number: CN202120685378.5U
Authority: CN
Inventors: 叶小兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-07
Anticipated expiration: 2031-04-02

Abstract

The utility model provides a vein location blood sampling device relates to medical auxiliary instrument technical field. The arteriovenous positioning blood sampling device can accurately and quickly position arterial and venous blood vessels through the positioning assembly arranged in the arteriovenous positioning blood sampling device and the ultrasonic sensor and the signal processor which are connected with each other, and helps medical staff to quickly make a diagnosis result, so that a treatment method is adopted in time, and the condition that the optimal treatment time is missed is avoided. In addition, the blood sampling assembly in the positioning blood sampling device can be replaced in time, blood disease infection can be avoided, and the positioning blood sampling device is suitable for different patients and has strong practicability.

Description

Artery and vein positioning blood sampling device

Technical Field

The utility model relates to a medical treatment auxiliary instrument technical field particularly, relates to a sound arteries and veins location blood sampling device.

Background

At present, arteriovenous blood sampling is generally performed in a manual identification mode. When the artery blood sampling is carried out and the vein position of the artery is relatively close, the condition of blood sampling error is easy to occur, the blood sampling result is influenced, and the diagnosis and treatment are delayed. Particularly, in an emergency (for example, in case of emergency), the blood needs to be quickly and accurately sampled and then tested, so that the doctor can judge the state of an illness in time through a blood testing result, and can treat a patient in time to strive for time. In addition, the use of an artery positioning device in an emergency location is inconvenient and tends to delay the optimal treatment time, such as when the patient is on an emergency ambulance. Therefore, find a portable and can be accurate the blood sampling device who locates the artery and vein and can promote the convenience of blood sampling greatly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vein location blood sampling device, it can make things convenient for medical staff to carry and can confirm artery and meridian position fast accurately to medical staff's accuracy distinguishes artery and vein, thereby takes a blood sample and tests blood, in time treats the patient.

The embodiment of the utility model is realized like this:

an arteriovenous positioning blood sampling device comprises a shell, a positioning assembly and a blood sampling assembly. The blood sampling device comprises a shell, a partition piece, a detection port, a blood sampling port and a blood sampling port, wherein the shell can be matched with the shell to form a cavity, the partition piece is arranged on the inner wall of the cavity and divides the cavity into a placing chamber and a closed chamber, the placing chamber is provided with the blood sampling port, and the closed chamber is provided with the detection port; the positioning assembly is arranged in the closed chamber and comprises an ultrasonic sensor and a signal processor which are mutually connected, the detection end of the ultrasonic sensor passes through the detection port, and the signal processor is used for processing signals transmitted by the ultrasonic sensor; the blood sampling subassembly sets up in placing indoorly, and the blood sampling subassembly is including the syringe needle, needle tubing and the blood collecting vessel that connect gradually, and the one end that the needle tubing is connected the syringe needle passes the blood collection mouth and extends to the shell outside. The blood sampling device can be conveniently carried by medical workers and can quickly and accurately determine the positions of arteries and veins so that the medical workers can accurately distinguish the arteries and the veins, and therefore blood sampling and blood testing are performed and patients are treated in time.

The utility model discloses an in some embodiments, it is provided with the mounting to place the indoor side, and the mounting has the solid chamber of card, and blood collection vessel joint is in the solid intracavity of card.

In some embodiments of the present invention, the fixing member is provided with a first elastic arm and a second elastic arm, and the first elastic arm and the second elastic arm together form a clamping fixing cavity.

The utility model discloses an in some embodiments, the shell is provided with the opening with the department of correspondence of placing indoor wall and shelters from the lid, shelters from lid and the opening and corresponds the setting, and shelters from the lid and can dismantle with the shell and be connected.

In some embodiments of the present invention, the positioning assembly includes an indicator, the indicator is connected to the signal processor, and the indicator is disposed on the housing.

The utility model discloses an in some embodiments, the shell corresponds blood sampling mouth edge and is provided with the pressure control valve, and the pressure control valve is used for controlling the blood velocity of flow.

The utility model discloses an in some embodiments, the pressure control valve is provided with slide bar and bellying, and the edge of taking a blood sample mouth is equipped with the arc recess, and the one end of slide bar is connected with the edge rotation of taking a blood sample mouth, and the other end of slide bar passes through bellying and arc groove connection, and the bellying slides along the arc recess.

In some embodiments of the present invention, the separator is mesh-shaped.

In some embodiments of the utility model, still include the colour and distinguish the subassembly, the colour is distinguished the subassembly and is included color sensor, and color sensor sets up in the one end that the placing chamber is close to the needle tubing.

The utility model discloses an in some embodiments, the subassembly is differentiateed to the colour includes the suggestion piece, and the suggestion piece is connected with color sensor, and the suggestion piece is used for indicateing blood colour.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

the blood sampling device comprises a shell, a positioning assembly and a blood sampling assembly. Wherein, the shell can self cooperation form the cavity, is provided with the separator on the inner wall of cavity, and the separator separates the cavity for placing chamber and closed chamber, and placing chamber and closed chamber are used for holding blood sampling subassembly and locating component respectively, and the placing chamber is equipped with the blood sampling mouth, and the closed chamber is equipped with surveys the mouth. The positioning component in the closed type mainly comprises an ultrasonic sensor and a signal processor, and a detection end of the ultrasonic sensor passes through the detection port and extends to the outside of the shell, and the detection end is mainly used for detecting the positions of veins and arteries and determining whether the detected blood vessel is an artery or a vein due to Doppler frequency shift generated by the inconsistency of the blood flow velocity of the arteries and the veins. In addition, the ultrasonic sensor is connected with the signal processor, and the signal processor can collect ultrasonic signals and convert acoustic signals into electric signals, so that the type of blood vessels of medical workers is prompted, and the condition of blood sampling errors is avoided.

Place indoor blood sampling subassembly including the syringe needle, needle tubing and the blood collecting vessel that connect gradually, and the one end of needle tubing connection syringe needle passes the blood taking port and extends to the shell outside. Medical staff can pierce the needle into the blood vessel after determining the artery and vein positions, and blood in the artery blood vessel or the vein blood vessel flows into the needle tube due to the tension of the blood vessel and is collected through the blood collecting vessel, so that the medical staff can conveniently take the blood collecting vessel in time and test the blood, and a diagnosis basis is provided for doctors. In addition, because the volume of the blood sampling device is small, medical staff can control the blood sampling device to position an artery or vein by one hand, and the needle head is accurately punctured into the vein to take and test blood after the correct blood sampling position is confirmed, so that the quick and convenient effect is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional view of an arteriovenous positioning blood sampling device provided by an embodiment of the present invention;

fig. 2 is a schematic front view of an arteriovenous blood sampling device provided in an embodiment of the present invention;

fig. 3 is a schematic view of a placing room provided by an embodiment of the present invention;

fig. 4 is a schematic structural view of a pressure control valve provided in an embodiment of the present invention;

fig. 5 is a schematic view of a protruding portion structure according to an embodiment of the present invention.

Icon: 100-arteriovenous positioning blood sampling device; 110-a housing; 112-a separator; 114-a holding chamber; 116-a closed chamber; 118-a blood collection port; 120-a probe port; 122-a fixing member; 124-clamping and fixing cavity; 126-a first resilient arm; 128-a second resilient arm; 130-a shutter cover; 132-an opening; 134-an indicator; 150-an ultrasonic sensor; 152-a signal processor; 154-a color sensor; 156-a reminder; 170-blood collecting vessel; 172-needle tubing; 174-a needle; 178-sliding rod; 180-a boss; 182-arc groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first" and "second," etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of an arteriovenous positioning blood sampling device 100 provided in this embodiment. The blood collection device 100 includes a housing 110, a positioning assembly, and a blood collection assembly. The housing 110 may itself cooperate to form a chamber, with a partition 112 disposed on an inner wall of the chamber, the partition 112 dividing the chamber into a placement compartment 114 and an enclosure compartment 116, the placement compartment 114 and the enclosure compartment 116 housing the blood collection assembly and the positioning assembly, respectively. Wherein, ultrasonic sensor 150 among the locating component can detect the blood flow velocity of flow in order to distinguish artery and vein blood vessel to in transmitting this kind of acoustic signal to signal processing, then convert the signal of telecommunication in signal processor 152, thereby the accuracy of suggestion blood sampling person's blood sampling position, the practicality is stronger.

As shown in fig. 1, in this embodiment, a partition 112 is disposed on an inner wall of the chamber, and the partition 112 divides the chamber into a placing chamber 114 and a closing chamber 116. The positioning assembly within the enclosure 116 generally includes an ultrasonic transducer 150 and a signal processor 152 connected to one another, and a probe portion of the ultrasonic transducer 150 may extend outside the housing 110 through a probe port 120 provided in the housing 110. Since arteries are the vessels that carry blood away from the heart and are thick, under tension, and expand and contract with the wall during ventricular ejection and relaxation, the momentum is high and the flow rate of arterial blood is faster than that of venous blood. Thus, the probe end of the ultrasonic sensor 150 can generate a doppler shift due to the acoustic signal, measure the blood flow velocity, and then position the arterial and venous vessels. It should be noted here that the doppler shift is proportional to the blood flow rate. In other embodiments, the probe end of the ultrasonic sensor 150 can also transmit and receive the acoustic signal and transmit it to the signal processor 152, and the signal processor 152 can obtain the blood flow rate by measuring the time difference between the two signals, so as to locate the artery and vein vessels, thereby providing greater convenience for the medical staff. It is also noted herein that the blood collection device 100 is typically used to take blood in the femoral, radial and dorsum arteries vessels. And because femoral artery's position is darker, and is located the thigh inboard, and the groin is lower than 1/3 and 2/3 juncture, comparatively privacy, consequently uses the utility model provides a blood sampling device 100 can improve the success rate of blood sampling greatly to its location blood sampling, reduces patient's misery, and practical value is higher. In addition, the femoral artery and the radial artery are accompanied with the vein, and if the positioning is not accurate, the vein is easy to be punctured by mistake, thereby affecting the blood drawing result and delaying diagnosis and treatment. It is also noted herein that the blood in arterial and venous vessels (except pulmonary artery and pulmonary vein) is arterial and venous blood, respectively. Referring to fig. 2, fig. 2 is a schematic front view of an arteriovenous blood sampling device 100 according to an embodiment of the present invention. In this embodiment, the housing 110 is provided with an indicator 134, as shown in fig. 2, the indicator 134 is in signal connection with the signal processor 152, which can effectively help medical staff to quickly and accurately take blood. In this embodiment, the indicator 134 is an indicator light, and in other embodiments, the indicator 134 may be a voice indicator, a display screen indicator, or the like. It should be noted that in the present embodiment, the ultrasonic sensor is a small-diameter bimorph ultrasonic probe, and the model is XJSS-P/F/Z/T5P- Φ 4.

In this embodiment, a color sensor 154 is disposed in the closed compartment 116, and the color sensor 154 is disposed below the placement compartment 114 (at an end adjacent to the needle 172). In addition, in the present embodiment, the separator 112 is net-shaped. Thus, color sensor 154 can identify the color of blood in blood collection vessel 170 through mesh separator 112 to facilitate further confirmation by medical personnel that the blood sample was taken. When the blood collected in blood collection vessel 170 is venous blood, the blood color should be dark red, and when the blood collected in blood collection vessel 170 is arterial blood, the blood color should be bright red. In this embodiment, the shell 110 is provided with a prompting member 156, as shown in fig. 2, the prompting member 156 can prompt the color of blood of the medical staff to be bright red or dark red in time, so as to help the medical staff to further confirm whether the blood sampling is correct. In this embodiment, the prompting element 156 is a prompting light, and in other embodiments, the prompting element 156 may be a voice prompt, a display screen prompt, or the like. It should be noted that in the present embodiment, the blood collecting vessel 170 is made of transparent material to facilitate the color sensor 154 to identify the color of blood. In this embodiment, the color sensor 154 is disposed at the lower portion of the placement chamber 114 (i.e., the outer side of the placement chamber 114 near the end of the needle tube 172), so that the color sensor 154 can still recognize the color of the blood when the blood volume in the blood collection tube 170 is small. In this embodiment, the color sensor is an ADJD-S311 digital color sensor, and the size thereof is 2.2mm × 2.2mm × 0.76 mm.

In this embodiment, the blood collection assembly in the placement chamber 114 includes a needle 174, a needle tube 172 and a blood collection tube 170, one end of the needle tube 172 is connected to the blood collection tube 170, and the other end of the needle tube 172 passes through the blood collection port 118 of the housing 110 and is connected to the needle 174. Referring to fig. 3, fig. 3 is a schematic view of a placing chamber 114 according to an embodiment of the present invention. As shown in fig. 3, in the present embodiment, a fixing member 122 is disposed on an inner wall of the placement chamber 114, the fixing member 122 includes a first elastic arm 126 and a second elastic arm 128, the first elastic arm 126 and the second elastic arm 128 cooperate to form a clamping cavity 124, and the clamping cavity 124 is used for accommodating a placement blood collection tube 170. The first elastic arm 126 and the second elastic arm 128 have a certain deformation capability, so that the blood collection vessel 170 can be fixed in the clamping cavity 124 under the condition of applying pressure. When a pulling force is applied, the first elastic arm 126 and the second elastic arm 128 deform again, namely, the first elastic arm and the second elastic arm bend outside the clamping cavity 124, so that the blood collection tube 170 can be taken out easily, and medical staff can perform other tests such as blood gas analysis conveniently. Before medical staff uses this blood sampling device 100, can fix a position the blood sampling subassembly in the solid chamber 124 of card, then fix a position and take a blood sample, after accurate blood sampling, take out the blood sampling subassembly, carry out the analysis and detection, so can make this blood sampling device 100 fix a position the blood sampling to a plurality of patients, can also effectively avoid patient's blood to receive the pollution to influence blood analysis result, influence doctor's diagnostic result. In other embodiments, multiple fasteners 122 may be provided, such as 3 and 4, etc. In other embodiments, the first elastic arm 126 and the second elastic arm 128 may also be disposed in a staggered manner, so as to improve the stability of the fixing member 122. It should be noted that in this embodiment, the blood collection assembly further includes a needle plug, which can block the blood collection end of the needle 174 to prevent air from entering the blood collection tube 170 through the needle 174 and the needle tube 172, and affecting the arterial blood-gas analysis result.

Referring to fig. 4, fig. 4 is a schematic view of a pressure control valve according to an embodiment of the present invention. As shown in fig. 4, in the present embodiment, the pressure control valve is disposed at the blood collection port 118, and the pressure control valve includes a sliding rod 178 and a protrusion portion 180, one end of the sliding rod 178 is rotatably connected to the edge of the blood collection port 118, the other end of the sliding rod 178 is connected to the arc groove 182 through the protrusion portion 180, and the protrusion portion 180 can slide along the arc groove 182. In this embodiment, the two ends of the sliding rod 178 are respectively disposed on the two sides of the blood collection port 118, so that the sliding rod 178 can control the effective volume of the needle tube 172 through the sliding of the blood collection port 118, that is, the sliding rod 178 can generate a certain squeezing effect on the needle tube 172 in the sliding process of the arc-shaped groove 182, and when the sliding rod 178 slides in the direction of the needle tube 172, the flow rate of blood can be effectively controlled. In the case of positioning an artery and taking arterial blood, the arterial blood flows into the needle tube 172 through the needle 174 at a high speed due to the high flow rate of the arterial blood, and the sliding rod 178 is arranged to adjust the flow rate of the blood in the needle tube 172 according to the size of the cross-sectional area of the needle tube 172, so as to prevent the blood from overflowing quickly and being unable to be prevented in time. And the setting of pressure control valve can also in time hinder blood to flow into blood collection pipe 170 when the blood sampling is ended, provides the void time of pulling out the needle and taking blood collection pipe 170 for medical staff, and the convenience is stronger.

Referring to fig. 5, fig. 5 is a schematic structural view of a protruding portion 180 according to an embodiment of the present invention. As shown in fig. 5, one end of the slide bar 178 is provided with a protrusion 180, and the protrusion 180 is composed of an upper rectangular parallelepiped (rectangular in cross section and small in width) and a lower rectangular parallelepiped (rectangular in cross section and large in width). Specifically, the big cuboid of below can pass the groove top of arc recess 182, then gets into the below of arc recess 182, and little cuboid can slide along the route that sets up of arc recess 182 this moment, and the big cuboid can prevent that bellying 180 from droing out arc recess 182, and is fixed more stable.

As shown in fig. 2, in the present embodiment, an opening 132 and a shielding cover 130 are disposed at a position corresponding to the inner wall of the placing chamber 114 of the housing 110, the shielding cover 130 is disposed corresponding to the opening 132, and the shielding cover 130 is detachably connected to the housing 110. The housing 110 has an opening 132 adapted to the shape of the cover 130, and the opening 132 is also an opening 132 corresponding to the placement chamber 114, so that medical staff can conveniently install and take away the blood collection assembly, and the blood collection assembly is suitable for collecting blood of different patients, and has strong practicability. The blood sampling assembly is fixedly arranged in the placing chamber 114 in a replaceable state, so that the condition that the blood result analysis is inaccurate due to the mutual mixing of the blood of patients can be avoided, and the infection of diseases can be effectively prevented. In this embodiment, the cover 130 may be configured to relatively close the compartment 114, thereby further preventing the blood collection assembly from sliding off the positioning device 100, which may cause inconvenience. In addition, the shielding cover 130 not only provides a timely replacement of the blood collection assembly, but also provides a more aesthetic appearance to the positioning blood collection device 100.

It should be noted that, in the present embodiment, the positioning blood collecting device 100 has a power source and a power connection line, the power source is connected to the components requiring power in the present embodiment, and functions to increase the power source, for example, the power source is electrically connected to the signal processor 152. In this embodiment, the power supply unit is in the form of a built-in power supply, and the positioning blood collecting assembly is provided with a charging port, so that the positioning blood collecting device 100 can be used for a long time. In other embodiments, the power supply unit may also be provided in the form of an external power supply, such as a battery.

In use, medical personnel first install and secure the blood collection assembly in the clamping chamber 124 in the placement chamber 114 and then close the cover 130. Subsequently, the medical staff closes or attaches the detection port 120 to the blood sampling part to be detected, and observes the prompt of the indicator light, and when the prompt shows that the correct blood sampling part is confirmed, the blood sampler can pierce the needle 174 into the corresponding blood vessel to take blood and perform subsequent blood test. Further, when the blood enters the blood collecting vessel 170, the color sensor 154 can further give a prompt by recognizing the color of the blood, and at this time, the blood collector can further confirm whether the collected blood is correct. After the blood collection is completed, the blood collector can take out the blood collection assembly from the placing chamber 114 and replace the blood collection assembly with a new one so as to facilitate the positioning blood collection for other patients.

The arteriovenous positioning blood sampling device 100 has the working principle that:

the utility model provides a vein location blood sampling device 100 includes shell 110, locating component and blood sampling component. Wherein, shell 110 can form the cavity by self-adaptation, is provided with separator 112 on the inner wall of cavity, and separator 112 separates the cavity into placing chamber 114 and closed chamber 116, and placing chamber 114 and closed chamber 116 are used for holding blood sampling subassembly and locating component respectively, and placing chamber 114 is equipped with blood taking port 118, and closed chamber 116 is equipped with surveys mouth 120. The positioning assembly in the enclosure is mainly composed of an ultrasonic sensor 150 and a signal processor 152, and the detection end of the ultrasonic sensor 150 extends to the outside of the housing 110 through the detection port 120, and the detection end is mainly used for detecting the position of veins and arteries, and determining whether the detected blood vessel is an artery or a vein due to Doppler shift caused by the inconsistency of the flow rates of arterial and venous blood. The signal processor 152 can collect ultrasonic signals and convert the acoustic signals into electric signals, so that the types of blood vessels of medical workers are prompted, and the condition of blood sampling errors is avoided.

To sum up, the embodiment of the utility model provides a arteriovenous location blood sampling device 100, its locating component that can set up through inside, including interconnect's ultrasonic sensor 150 and signal processor 152, accurate quick location artery and vein vessel help medical staff to make the diagnosis result fast to in time take treatment method, avoid missing the best treatment time. In addition, the blood sampling assembly in the positioning blood sampling device 100 can be replaced in time, blood disease infection can be avoided, and the positioning blood sampling device is suitable for different patients and has strong practicability.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an artery and vein location blood sampling device which characterized in that includes:

the blood sampling device comprises a shell, a probe and a probe, wherein the shell is matched with the shell to form a cavity, a partition is arranged on the inner wall of the cavity and divides the cavity into a placing chamber and a closed chamber, the placing chamber is provided with a blood sampling port, and the closed chamber is provided with a probe port;

the positioning assembly is arranged in the closed chamber and comprises an ultrasonic sensor and a signal processor which are connected with each other, and a detection end of the ultrasonic sensor penetrates through the detection port;

the blood sampling subassembly, the blood sampling subassembly set up in place indoorly, the blood sampling subassembly is including syringe needle, needle tubing and the blood collecting vessel that connects gradually, just the needle tubing is connected the one end of syringe needle is passed the blood collection mouth extends to the shell is outside.

2. The arteriovenous positioning blood sampling device of claim 1 wherein the placement chamber is provided with a fixture having a clamping cavity, the blood collection vessel being clamped in the clamping cavity.

3. The arteriovenous positioning blood collection device of claim 2 wherein the mount is provided with first and second resilient arms which together form the clamp chamber.

4. The arteriovenous positioning blood sampling device of claim 3, wherein the housing is provided with an opening and a shielding cover corresponding to the inner wall of the placing chamber, the shielding cover is arranged corresponding to the opening, and the shielding cover is detachably connected with the housing.

5. The arteriovenous positioning lancing device of claim 4, wherein the positioning assembly comprises an indicator connected to the signal processor and disposed on the housing.

6. The arteriovenous positioning blood collection device of claim 5 wherein the housing has a pressure control valve disposed at the edge thereof corresponding to the blood collection port for controlling the flow rate of blood.

7. The arteriovenous positioning blood sampling device of claim 6, wherein the pressure control valve is provided with a sliding rod and a protruding part, the edge of the blood sampling port is provided with an arc-shaped groove, one end of the sliding rod is rotatably connected with the edge of the blood sampling port, the other end of the sliding rod is connected with the arc-shaped groove through the protruding part, and the protruding part slides along the arc-shaped groove.

8. The arteriovenous positioning lancing device of any one of claims 1 to 7 wherein the separator is mesh-like.

9. The arteriovenous positioning blood collection device of claim 8 further comprising a color discrimination assembly comprising a color sensor disposed at an end of the deployment compartment proximate the needle.

10. The arteriovenous positioning blood collection device of claim 9 wherein the color discrimination assembly comprises a cue connected to the color sensor for cueing blood color.