An arterial vascular indwelling probe device

Abstract

The application discloses an arterial blood vessel indwelling probe device and relates to the technical field of arterial indwelling probe detection. The device comprises a puncture unit and a negative pressure unit. The puncture unit comprises a needle sleeve, a catheter, a puncture assembly and a barrel pad. The negative pressure unit comprises an adapter pipe, a plugging assembly and a negative pressure assembly. The device realizes that the puncture needle is provided with an elastic return mechanism and a bidirectional limiting structure, so that the damage of the rear wall of the blood vessel caused by the excessively long needle tip is avoided. The air pressure in the adapter pipe acts on the flexible puncture of the tail end of the puncture needle, the shearing force of the needle tip on the tissue is reduced, and the risk of secondary damage of the blood vessel caused by the traditional rigid puncture is reduced. In addition, the blood collection can be completed without additional puncture by combining the functions of negative pressure blood collection and blood pressure monitoring, and the infection risk and operation complexity are reduced.

Description

Technical Field

[0001] This invention relates to arterial indwelling probe detection technology, and in particular to an arterial vascular indwelling probe device. Background Technology

[0002] Existing arterial catheter placement probes typically involve inserting the distal end of a pressure sensor catheter into the lumen of an artery (such as the radial or femoral artery). Pressure signals are transmitted via fluid within the catheter, and an external pressure sensor converts the mechanical pressure into an electrical signal, which is then transmitted to a monitoring device. The procedure generally involves: first, puncturing the blood vessel with a needle; then, advancing the catheter (external to the needle) into the lumen; and finally, withdrawing the needle to complete catheter placement. However, this traditional design has significant technical limitations in clinical application:

[0003] First, there is a high risk of vascular injury during catheter advancement. Operators must rely on experience to manually control the depth of catheter advancement, which can easily lead to secondary perforation of the vessel wall (especially the posterior wall of the artery) by the puncture needle, causing hematoma, extravasation, or even distal ischemia.

[0004] Secondly, existing devices have limited functionality and cannot meet the needs of multiple scenarios. Current arterial indwelling probes can only monitor blood pressure through a fluid conduction system, but cannot directly collect arterial blood samples. Additional puncture is required in clinical practice. At the same time, the fluid conduction path within the catheter is easily interfered with by air bubbles, twisting, or blood backflow, leading to distorted blood pressure data. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that there is a high risk of vascular injury during the advancement of the catheter when the existing puncture needle punctures the artery.

[0006] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes an arterial blood vessel indwelling probe device, which includes a puncture unit including a needle sheath, a catheter fixed in the inner lumen of the needle sheath, a puncture component slidably sleeved in the inner lumen of the catheter, and a cylindrical pad protruding from the tail end of the puncture component.

[0007] A negative pressure unit is located at the tail end of the puncture unit; the negative pressure unit is fixedly connected to the adapter tube at the tail end of the needle sheath, a sealing component disposed inside the adapter tube, and a negative pressure component fixedly connected to the tail end of the adapter tube.

[0008] The puncture assembly includes a puncture needle that is slidably embedded inside the catheter, a large spring that is fixedly disposed at one end of the inner wall of the needle sheath, and a fixing member installed on the inner wall of the needle sheath.

[0009] The negative pressure assembly includes a negative pressure cylinder, a pressure regulating component sleeved on the shaft of the negative pressure cylinder, and a pin slidably connected to the shaft of the negative pressure cylinder.

[0010] In a preferred embodiment of the arterial vascular indwelling probe device of the present invention: a detection unit, a hose connected to one side of the adapter tube, a stop clamp sleeved around the periphery of the hose, a pressure sensor connected to the end of the hose, and multiple sets of branch tubes connected to the end of the pressure sensor.

[0011] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the puncture needle includes a needle tail protruding from its tail end;

[0012] Furthermore, the other end of the large spring is fixedly connected to the side wall of the needle tail.

[0013] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the sealing assembly includes a connecting tube connected to the tail end of the transfer tube, a retaining ring fixedly sleeved on the end of the connecting tube, a small spring pressing against the inner wall of the connecting tube, and a sealing cap protruding from the other end of the small spring.

[0014] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the tail end of the connecting tube is provided with an inner ring;

[0015] And after contacting the sealing cap, it is sealed inside the tube.

[0016] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the pressure regulating component includes a screw rod that passes through the axis of the negative pressure cylinder, a rotating knob that protrudes from the outer end of the screw rod, and a valve plate sleeved around the screw rod.

[0017] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the screw is hollow inside, and the pin is slidably connected to the inner cavity of the screw;

[0018] The side of the negative pressure cylinder facing the sealing cover is the negative pressure zone.

[0019] In a preferred embodiment of the arterial vascular indwelling probe device of the present invention: the fixing member includes a limiting rod that slides through the inner wall of the tail end of the needle sheath, and a stop rod embedded in the inner wall of the tip of the needle sheath.

[0020] In a preferred embodiment of the arterial vascular indwelling probe device of the present invention: the needle tail includes a positioning hole penetrating one side of the puncture needle hole, a retraction groove opened at the tail end of the positioning hole, and a retaining groove opened at the end of the needle tail.

[0021] In a preferred embodiment of the arterial blood vessel indwelling probe device of the present invention: the positioning hole and the retraction groove cooperate with the limiting rod for positioning;

[0022] The retaining groove is positioned in conjunction with the retaining rod.

[0023] The beneficial effects of this invention are as follows: the puncture needle, through its elastic retraction mechanism and bidirectional limiting structure, avoids damage to the posterior wall of the blood vessel caused by excessive needle length. Furthermore, the air pressure inside the adapter acts on the flexible puncture point at the tail of the puncture needle, reducing the shear force of the needle tip on the tissue and minimizing the risk of secondary vascular damage caused by traditional rigid punctures. In addition, by combining negative pressure blood collection and blood pressure monitoring functions, blood collection can be completed without additional punctures, reducing the risk of infection and operational complexity. The negative pressure unit also ensures that there are no air bubbles or blood backflow in the fluid conduction path within the catheter by adjusting the internal pressure of the adapter, improving the accuracy of the blood pressure monitoring signal. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0025] Figure 1 A partial structural schematic diagram of the arterial blood vessel indwelling probe device of the present invention is shown;

[0026] Figure 2 A schematic diagram of the overall structure of the arterial blood vessel indwelling probe device of the present invention is shown;

[0027] Figure 3 A side sectional view of the arterial vessel placement probe device of the present invention is shown;

[0028] Figure 4 A full cross-sectional schematic diagram of the puncture unit structure of the present invention is shown;

[0029] Figure 5 A full cross-sectional schematic diagram of the negative pressure unit structure of the present invention is shown;

[0030] Figure 6 A three-dimensional sectional view of the puncture needle structure of the present invention is shown;

[0031] Figure 7 It shows Figure 3 Schematic diagram of the internal structure of the needle sheath at point A.

[0032] In the diagram: 1. Puncture unit; 2. Negative pressure unit; 3. Detection unit; 11. Needle sheath; 12. Catheter; 13. Puncture assembly; 14. Cylinder pad; 21. Adaptor tube; 22. Sealing assembly; 23. Negative pressure assembly; 31. Tube; 32. Stop clamp; 33. Pressure sensor; 34. Branch tube; 131. Puncture needle; 132. Large spring; 133. Fixing component; 231. Negative pressure cylinder; 232. Pressure regulating component; 233, ejector pin; 221, connecting pipe; 222, retaining ring; 223, small spring; 224, sealing cap; 1311, needle tail; 1331, limit rod; 1332, stop rod; 2211, inner ring; 2311, negative pressure zone; 2321, screw; 2322, rotary knob; 2323, valve plate; 13111, positioning hole; 13112, return groove; 13113, retaining groove. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0034] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0035] Reference Figures 1 to 7 This embodiment provides an arterial blood vessel indwelling probe device, including a puncture unit 1 including a needle sheath 11, a catheter 12 fixed in the inner cavity of the needle sheath 11, a puncture component 13 slidably sleeved in the inner cavity of the catheter 12, and a tube pad 14 protruding from the tail end of the puncture component 13.

[0036] Negative pressure unit 2 is located at the tail end of puncture unit 1; negative pressure unit 2 is fixedly connected to the adapter tube 21 at the tail end of needle sleeve 11, the sealing component 22 is disposed inside the adapter tube 21, and the negative pressure component 23 is fixedly connected to the tail end of adapter tube 21.

[0037] The puncture assembly 13 includes a puncture needle 131 that is slidably embedded inside the catheter 12, a large spring 132 that is fixedly disposed at one end of the inner wall of the needle sheath 11, and a fixing member 133 that is installed on the inner wall of the needle sheath 11.

[0038] The negative pressure assembly 23 includes a negative pressure cylinder 231, a pressure regulating component 232 sleeved on the axis of the negative pressure cylinder 231, and a pin 233 slidably connected to the axis of the negative pressure cylinder 231.

[0039] In this embodiment, a set of catheters 12 are fixedly fitted inside the needle sheath 11. One end of the catheter 12 extends out of the needle sheath 11 and is much longer than the needle sheath 11, so that it can be left in the blood vessel after the puncture component 13 punctures the artery. The puncture component 13 is elastically slidably connected to the axis of the needle sheath 11 and is limited by the air pressure after the sealing component 22 is closed, so as to realize the retraction of the puncture needle. The cylinder pad 14 protrudes on both sides of the needle sheath 11 and is used to fix the catheter 12 after it is left in the artery.

[0040] Preferably, the negative pressure unit 2 can quickly retract the puncture component 13 by adjusting the pressure change inside the needle sheath 11. The tail end of the needle sheath 11 is secured to a connecting tube 21 via a snap-fit ​​seal. The connecting tube 21 can be connected to an external pressure tube for arterial blood testing or injection. A sealing component 22 is also secured to the tail end of the connecting tube 21. The sealing component 22 serves to seal the tail end of the needle sheath 11 and connects to the negative pressure component 23 at the tail end. The negative pressure component 23 can change its internal pressure and, by triggering the sealing component 22, transmit this pressure change to the puncture component 13, thereby causing the puncture component 13 to retract or puncture.

[0041] In a preferred embodiment, the adapter pipe 21 is a two-way pipe, one side of which can be connected to the negative pressure unit 2, and the other side can be connected to the detection unit 3.

[0042] In a preferred embodiment, the puncture assembly 13 comprises a puncture needle 131 slidably embedded inside the catheter 12, a large spring 132 fixedly disposed at one end of the inner wall of the needle sheath 11, and a fixing member 133 mounted on the inner wall of the needle sheath 11. The oblique end of the puncture needle 131 facilitates skin puncture, and its tail end cooperates with the large spring 132 to achieve an elastic connection, facilitating rapid retraction after puncturing the blood vessel. The fixing member 133 is used to limit the retraction and fix the extension of the puncture needle 131.

[0043] In a preferred embodiment, the negative pressure assembly 23 comprises a negative pressure cylinder 231, a pressure regulating component 232 sleeved on the axis of the negative pressure cylinder 231, and a ejector pin 233 slidably connected to the axis of the negative pressure cylinder 231. The negative pressure cylinder 231 is a transparent plastic cylinder, while the pressure regulating component 232 is in the form of a piston, which changes the pressure at the front end of the negative pressure cylinder 231 through the reciprocating motion of the piston. The ejector pin 233 is made of solid material, and the outer diameter of the ejector pin 233 is consistent with the inner diameter of the inlet at the front end of the negative pressure cylinder 231, ensuring that the ejector pin 233 can seal the negative pressure cylinder 231.

[0044] As an optional implementation, the fixing member 133 is a slotted limiting member. The tail end of the puncture needle 131 is fixed by the slotted member, and the large spring 132 quickly rebounds after the fixing member 133 releases the limiting of the puncture needle 131, allowing the puncture needle 131 to be exposed outside the catheter 12.

[0045] As an optional implementation, the sealing component 22 can effectively seal the tail end of the adapter pipe 21. It can be an elastic baffle that opens and closes the adapter pipe 21 by pressing; or it can be a rotary valve that opens and closes the adapter pipe 21 by rotating.

[0046] It should be noted that, through the pulling motion of the pressure regulating component 232, negative pressure is applied to the front end of the negative pressure cylinder 231, and the sealing component 22 is tightly attached to the opening of the adapter 21 before the sealing is released; then, after the puncture needle 131 ejects the catheter 12, the puncture task is performed, puncturing the skin to form a needle plug, creating a sealed space inside the needle sheath 11, so that the puncture needle 131 is restricted by the sealing component 22 and the sealing limitation of the needle sheath 11 and cannot compress the internal space, thus preventing it from retracting, thereby performing a flexible puncture task; when the blood vessel is punctured, when the blood flows into the adapter 21, the ejector needle 233 moves forward, releasing the sealing effect of the sealing component 22, allowing the air pressure inside the negative pressure cylinder 231 to absorb the puncture needle 131 and the blood, completing the retraction of the puncture needle 131 and the collection of arterial blood.

[0047] Reference Figures 1-3 As an optional embodiment, an arterial blood pressure monitoring device is provided, which further includes a detection unit 3, a hose 31 connected to one side of the adapter tube 21, a stop clamp 32 sleeved around the hose 31, a pressure sensor 33 connected to the end of the hose 31, and multiple branches 34 connected to the end of the pressure sensor 33.

[0048] In this embodiment, the flexible tube 31 is a transparent flexible tube sealed and connected to one side of the adapter tube 21. The catheter 12 inserts its end into the lumen of an artery, such as the radial artery or femoral artery. The pressure signal is transmitted by the blood in the catheter 12, and then the external pressure sensor 33 converts the mechanical pressure into an electrical signal and transmits it to the monitoring device.

[0049] As an optional implementation, the pressure sensor 33 has a three-way pipe inside, and the branch pipe 34 can occupy two paths. One path can be connected to the drip tube to return the anticoagulant saline to the catheter 12 to prevent thrombosis; the other path can be the interface cable of the pressure sensor 33 to convert mechanical pressure into an electrical signal and transmit it to the monitoring equipment.

[0050] Reference Figures 4-7 As an optional embodiment, the puncture assembly 13 includes a puncture needle 131 that is slidably embedded inside the catheter 12, a large spring 132 that is fixedly disposed at one end of the inner wall of the needle sheath 11, and a fixing member 133 that is installed on the inner wall of the needle sheath 11.

[0051] The puncture needle 131 includes a needle tail 1311 protruding from its tail end;

[0052] The other end of the large spring 132 is fixedly connected to the side wall of the needle tail 1311.

[0053] The sealing assembly 22 includes a connecting pipe 221 connected to the tail end of the adapter pipe 21, a retaining ring 222 fixedly sleeved on the end of the connecting pipe 221, a small spring 223 pressed against the inner wall of the connecting pipe 221, and a sealing cap 224 protruding from the other end of the small spring 223.

[0054] In one embodiment provided in this application, the end of the connecting pipe 221 is provided with an inner ring 2211;

[0055] And after contacting the sealing cap 224, it seals the inside of the tube.

[0056] In one embodiment provided in this application, the pressure regulating component 232 includes a screw 2321 that passes through the axis of the negative pressure cylinder 231, a rotating knob 2322 that protrudes from the outer end of the screw 2321, and a valve plate 2323 that is sleeved around the screw 2321.

[0057] In one embodiment provided in this application, the screw 2321 is hollow inside, and the ejector pin 233 is slidably connected to the inner cavity of the screw 2321;

[0058] The side of the negative pressure cylinder 231 facing the sealing cover 224 is the negative pressure zone 2311.

[0059] In one embodiment provided in this application, the fixing member 133 includes a limiting rod 1331 that slides through the inner wall of the tail end of the needle sheath 11, and a stop rod 1332 that is embedded in the inner wall of the tip of the needle sheath 11.

[0060] In one embodiment provided in this application, the needle tail 1311 includes a positioning hole 13111 penetrating one side of the puncture needle 131, a retraction groove 13112 opened at the tail end of the positioning hole 13111, and a retaining groove 13113 opened at the end of the needle tail 1311.

[0061] In one embodiment provided in this application, the positioning hole 13111 and the retraction groove 13112 are positioned in conjunction with the limiting rod 1331;

[0062] The retaining groove 13113 and the retaining rod 1332 are positioned in conjunction.

[0063] In this embodiment, the tail end of the puncture needle 131 is provided with a needle tail 1311, and the side wall of the needle tail 1311 is fixedly connected to the other end of the large spring 132 to form an elastic transmission structure; the needle tail 1311 is provided with a positioning hole 13111 through the needle hole, a retraction groove 13112, and a retaining groove 13113 at the end, such as Figure 7As shown, it is used to cooperate with the fixing member 133 to achieve the limiting and retraction control of the puncture needle 131. One end of the large spring 132 is fixed to the inner wall of the needle sheath 11, and the other end is fixed through the side wall of the needle tail 1311, realizing an elastic connection with the puncture needle 131 and providing the power source for the retraction of the puncture needle 131. The fixing member 133 includes a limiting rod 1331 that slides through the inner wall of the tail end of the needle sheath 11, and a stop rod 1332 that is embedded in the inner wall of the tip of the needle sheath 11. The limiting rod 1331 matches the positioning hole 13111 and the retraction groove 13112 of the puncture needle 131, and the stop rod 1332 matches the stop groove 13113 of the puncture needle 131, together realizing the bidirectional limiting of the puncture needle 131.

[0064] Preferably, the sealing assembly 22 includes a connecting tube 221 connected to the tail end of the adapter tube 21, a retaining ring 222 fixedly sleeved on the end of the connecting tube 221, a small spring 223 pressed against the inner wall of the connecting tube 221, and a sealing cap 224 protruding from the other end of the small spring 223. Specifically: the tail end of the connecting tube 221 has a protruding inner ring 2211, which seals upon contact with the sealing cap 224; the tube body communicates with the adapter tube 21, providing a channel for negative pressure transmission and blood collection. The sealing cap 224 is tightly pressed against the inner ring 2211 of the connecting tube 221 by the elastic force of the small spring 223, forming a dynamic sealing structure; when the ejector pin 233 abuts against the sealing cap 224, it can compress the small spring 223 and release the seal.

[0065] Preferably, the pressure regulating component 232 includes a screw 2321 extending through the axis of the negative pressure cylinder 231, a rotating knob 2322 protruding from the outer end of the screw 2321, and a valve plate 2323 sleeved around the screw 2321. The screw 2321 is hollow, providing a communication channel between the ejector pin 233 and the negative pressure zone 2311. The rotating knob 2322 is linked to the screw 2321, and by rotating it, the position of the valve plate 2323 is adjusted, thereby regulating the air pressure within the negative pressure cylinder 231. The valve plate 2323 is threaded around the screw 2321, and its sidewall is tightly fitted against the inner wall of the negative pressure cylinder 231. The ejector pin 233 controls the communication state between the negative pressure zone 2311 and the adapter pipe 21 by changing the diameter of its shaft.

[0066] During the puncture phase: The limiting rod 1331 is pulled outward from its original position embedded in the positioning hole 13111, causing the needle tail 1311 to move outward under the reset action of the large spring 132. At this time, the limiting rod 1331 slides along the avoidance trajectory of the return groove 13112, and the puncture needle 131 is elastically ejected outward from the catheter 12. Subsequently, the stop rod 1332 embedded in the needle sheath 11 elastically intercepts the needle tail 13111 in the stop groove 13113, locking the puncture needle 131 in the catheter 12, ensuring that the needle tip only protrudes outside the catheter 12. By using elastic ejection instead of traditional rigid extension, the risk of secondary vascular injury caused by rigid advancement of the puncture needle 131 is significantly reduced. After the stop rod 1332 is embedded in the stop groove 13113, it further restricts the excessive extension of the puncture needle 131, preventing the needle tip from puncturing the blood vessel wall, thereby achieving precise control and safety assurance during the puncture process.

[0067] After the needle tip of the puncture needle 131 pierces the skin, a physical seal is formed at the needle hole. This, combined with the sealing component 22 at the end of the adapter 21 and the stop-fluid clamp 32 on the branch, forms a sealing system. The specific process is as follows: After the needle tip pierces the skin, the needle hole is covered by skin tissue, forming a natural sealing layer. Next, the stop-fluid clamp 32 clamps the branch of the adapter 21, blocking the communication between the outside air and the inside of the adapter 21, maintaining a negative pressure environment inside the adapter 21. The needle tail 1311, within the needle sheath 11, is pushed towards the outside of the catheter 12 by the elastic force of the large spring 132. At this time, the inside of the needle sheath 11 forms a sealed space due to the sealing effect of the sealing component 22 and the stop-fluid clamp 32. The air pressure cannot be compressed, forcing the puncture needle 131 to pierce the skin in a flexible manner. Traditional rigid punctures are prone to causing damage to the blood vessel wall. The flexible puncture mechanism is achieved through the elastic linkage between the flexible material of the inner wall of the needle sheath 11, such as the silicone coating, and the puncture needle 131, thereby reducing the shearing force of the needle tip on the tissue.

[0068] As an optional implementation, the puncture needle 131 is locked to the catheter 12, with its tip only protruding 2-3 mm from the front end of the catheter 12, avoiding damage to the posterior wall of the blood vessel caused by an excessively long needle tip in traditional designs. Furthermore, the pressure inside the adapter 21 can be adjusted by the pressure regulating function of the negative pressure unit 2, facilitating rapid pumping of blood into the adapter 21.

[0069] Retraction Phase: After the puncture needle 131 punctures the blood vessel, blood pressure will force blood into the puncture needle 131, quickly filling the lumen of the adapter tube 21, facilitating observation and needle cessation. At this moment, the small spring 223 pushes the sealing cap 224 to press tightly against the inner ring 2211 of the connecting tube 221, sealing the tail end of the adapter tube 21 to prevent blood backflow or leakage. Once the blood transfer tube 21 reaches the lumen, the puncture needle 131 is quickly stopped from being pushed forward. The ejector pin 233 is then moved forward to contact the sealing cap 224 and compress the small spring 223, causing the sealing cap 224 to disengage from the inner ring 2211. The tail end of the transfer tube 21 opens instantly. The negative pressure zone 2311 of the negative pressure cylinder 231 draws blood into the lumen of the catheter 12 through the transfer tube 21 and draws back the needle tail 1311, achieving rapid retraction of the puncture needle 131 after puncturing the blood vessel and blood collection. This completes the linkage between dynamic sealing and negative pressure blood collection, enabling blood collection to be completed without additional operations after puncture. The closed blood collection path reduces the risk of infection and meets the requirements of clinical aseptic operation.

[0070] In summary, the puncture needle 131, through its elastic retraction mechanism and bidirectional limiting structure, avoids damage to the posterior wall of the blood vessel caused by excessive needle length. Furthermore, the air pressure inside the adapter tube 21, acting on the flexible puncture point at the tail of the puncture needle 131, reduces the shearing force of the needle tip on the tissue, minimizing the risk of secondary vascular injury caused by traditional rigid punctures. In addition, the combination of negative pressure blood collection and blood pressure monitoring functions allows for blood collection without additional punctures, reducing the risk of infection and operational complexity. The negative pressure unit 2 also regulates the internal pressure of the adapter tube 21 to ensure that there are no air bubbles or blood backflow along the fluid conduction path within the catheter, improving the accuracy of the blood pressure monitoring signal.

[0071] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An arterial blood vessel indwelling probe device, characterized in that: a puncture unit (1) comprising a needle sleeve (11), a catheter (12) fixed in the inner cavity of the needle sleeve (11), a puncture assembly (13) slidingly sleeved in the inner cavity of the catheter (12), and a barrel pad (14) protruding from the tail end of the puncture assembly (13); a negative pressure unit (2) at the tail end of the puncture unit (1); the negative pressure unit (2) comprises an adapter pipe (21) fixedly connected to the tail end of the needle sleeve (11), a blocking assembly (22) arranged on the inner side of the adapter pipe (21), and a negative pressure assembly (23) fixedly connected to the tail end of the adapter pipe (21); the puncture assembly (13) comprises a puncture needle (131) slidingly embedded in the inner side of the catheter (12), a large spring (132) fixedly arranged on one end of the inner wall of the needle sleeve (11), and a fixing piece (133) mounted on the inner wall of the needle sleeve (11); the puncture needle (131) comprises a needle tail (1311) protruding from the tail end thereof; and the other end of the large spring (132) is fixedly connected to the side wall of the needle tail (1311); the negative pressure assembly (23) comprises a negative pressure barrel (231), a pressure regulating piece (232) sleeved on the axis of the negative pressure barrel (231), and a plunger (233) slidingly connected at the axis of the negative pressure barrel (231); a detection unit (3) comprising a hose (31) communicated with one side of the adapter pipe (21), a liquid stopping clamp (32) sleeved on the peripheral side of the hose (31), a pressure sensor (33) communicated with the end of the hose (31), and a plurality of branch pipes (34) communicated with the end of the pressure sensor (33); the fixing piece (133) comprises a limiting rod (1331) slidingly penetratingly arranged on the inner wall of the tail end of the needle sleeve (11), and a stop rod (1332) embedded in the inner wall of the tip of the needle sleeve (11); the needle tail (1311) comprises a positioning hole (13111) penetratingly arranged on one side of the needle hole of the puncture needle (131), a back-off groove (13112) arranged at the tail end of the positioning hole (13111), and a blocking groove (13113) arranged at the end of the needle tail (1311); the positioning hole (13111) and the back-off groove (13112) are positioned in cooperation with the limiting rod (1331); the blocking groove (13113) is positioned in cooperation with the stop rod (1332).

2. The arterial blood vessel indwelling probe device according to claim 1, characterized in that: the blocking assembly (22) comprises a connecting pipe (221) communicated with the tail end of the adapter pipe (21), a stop ring (222) fixedly sleeved on the end of the connecting pipe (221), a small spring (223) extruded on the inner wall of the connecting pipe (221), and a sealing cover (224) protruding from the other end of the small spring (223).

3. The arterial blood vessel indwelling probe device according to claim 2, characterized in that: the tail end of the connecting pipe (221) protrudes an inner ring (2211). and seals the tube after contacting the sealing cover (224). 4.The arterial blood vessel indwelling probe device according to claim 3, characterized in that: The pressure regulating member (232) comprises a screw rod (2321) penetrating through the axis of the negative pressure cylinder (231), a rotating knob (2322) protruding from the outer end of the screw rod (2321), and a valve plate (2323) sleeved on the side of the screw rod (2321). 5.The arterial blood vessel indwelling probe device according to claim 4, characterized in that: The screw rod (2321) is hollow inside, and the thimble (233) is slidingly connected in the inner cavity of the screw rod (2321); The side of the negative pressure cylinder (231) facing the sealing cover (224) is a negative pressure area (2311).

Images