Puncture device for invasive arterial blood pressure monitoring

Abstract

The utility model relates to a puncture device for invasive arterial blood pressure monitoring, which comprises an artery puncture part for puncturing the blood vessel of a patient and an angle control part for adjusting the puncture angle of the artery puncture part, the angle control part is provided with a support frame, the support frame is provided with a rotating rod in a penetrating manner, and the rotating rod can rotate along the axis of the rotating rod. One end of the rotating rod is connected with a guide groove capable of synchronously rotating with the rotating rod, the other end of the rotating rod can be structurally matched with a locking assembly arranged on the surface of the supporting frame to lock the rotating rod, and under the condition that the guide groove rotates to a preset angle, a needle cylinder arranged on the artery puncture part can be placed on the inner side of the guide groove; the artery puncture part can puncture the blood vessel of a patient at a preset angle under the guiding effect of the rollers arranged on the inner side wall of the guiding groove on the needle cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a puncture device for invasive arterial blood pressure monitoring. Background Art

[0002] Invasive arterial blood pressure monitoring technology is a method of continuously measuring arterial blood pressure by directly inserting an arterial catheter into an artery. This technology can timely and accurately reflect the real-time changes in blood pressure, providing important physiological parameters for clinical practice, especially for critically ill patients such as shock patients, cardiac surgery patients, and other major surgery patients, with irreplaceable monitoring value. Through the arterial catheter, not only can continuous blood pressure monitoring be achieved, but also a way for repeated sampling can be provided, facilitating clinical treatment. Arterial puncture technology is a key step in realizing invasive arterial blood pressure monitoring. Common puncture and catheterization positions include the radial artery, brachial artery, femoral artery, ulnar artery, dorsal artery of the foot, etc. Among them, the radial artery has become the most commonly used arterial puncture site because of its superficial position, relative fixation, and simple puncture and catheterization operation. Usually, the left radial artery is preferentially selected for puncture to reduce the possible impact on the patient's daily life of the right radial artery.

[0003] In the traditional arterial puncture process, when using a single arterial indwelling needle for arterial puncture, there are problems such as unclear blood return observation and blood clot blockage of the needle tip, which makes it difficult to determine whether the needle has successfully entered the blood vessel. In addition, using the arterial penetration method and then using the method of withdrawing the indwelling needle hose with a syringe under negative pressure can determine that the needle has entered the artery, but when completely pushing the arterial indwelling needle hose into the artery, there are risks of folding, contamination, and failure to send. These problems not only increase the complexity of the operation but also increase the risks of infection and complications. In addition, during arterial puncture, different puncture angles also have a greater impact on subsequent monitoring and treatment. The fine adjustment of the puncture angle is not only related to the success rate of puncture but also may affect the stability of the arterial catheter and the accuracy of subsequent monitoring. Therefore, the selection and adjustment of the puncture angle are important links in arterial puncture technology.

[0004] CN216257328U discloses an arterial indwelling needle puncture device, which is provided with a puncture seat and a syringe including a puncture sleeve inside, and also includes a pushing clip with a hollow puncture needle inside. A sleeve for fixing the lower end of the hollow puncture needle is provided on the bottom plate of the pushing clip, and a blood return tube communicating with the lower port of the hollow puncture needle is also provided under the bottom plate. The blood return tube is made of a transparent material, an upper part inside the blood return tube is provided with a blood return observation area, a lower part inside the blood return tube is provided with a blockage area for installing a blockage, the length of the blood return observation area is greater than 10 mm, and a convex lens for observing blood return is provided on the upper wall of the blood return observation area of the blood return tube.

[0005] The arterial indwelling needle puncture device of this patent is provided with a multi-component structure including a puncture seat, a syringe, a push clamp, etc. A sleeve for fixing the lower end of the hollow puncture needle is provided on the push clamp, and this design makes the puncture process more reliable. However, the puncture device described in this patent does not consider the adjustability of the puncture angle in its design. The puncture angle is crucial during arterial puncture because it directly affects the accuracy and stability of the needle entering the artery. A puncture device with a fixed angle may not be able to adapt to the anatomical structure and position differences of the arteries of different patients. For novice operators, the device does not provide specific guidance on angle adjustment, thus increasing the difficulty and error rate of novice operators in actual operation.

[0006] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, although the applicant has studied a large number of documents and patents when making this utility model, due to space limitations, all details and contents are not listed in detail. However, this does not mean that this utility model does not possess the features of these prior arts. On the contrary, this utility model already possesses all the features of the prior arts, and the applicant reserves the right to add relevant prior arts in the background art. Summary of the Utility Model

[0007] In view of the deficiencies of the prior art, this application proposes a puncture device for invasive arterial blood pressure monitoring, especially a puncture device for invasive arterial blood pressure monitoring that is convenient for controlling the puncture angle, aiming to solve one or more technical problems in the prior art.

[0008] The utility model relates to a puncture device for invasive arterial blood pressure monitoring, which includes an arterial puncture part for puncturing the blood vessels of a patient and an angle control part for adjusting the puncture angle of the arterial puncture part. The angle control part is configured with a support frame, and a rotating rod capable of rotating along its own axis is penetrated through the support frame. One end of the rotating rod is connected with a guiding groove capable of rotating synchronously with it, and the other end can cooperate structurally with a locking component arranged on the surface of the support frame to realize the locking of the rotating rod. When the guiding groove rotates to a predetermined angle, the syringe configured in the arterial puncture part can be placed inside the guiding groove, so that the arterial puncture part can puncture the blood vessels of the patient at a predetermined angle under the guiding action of a plurality of rollers arranged on the inner side wall of the guiding groove.

[0009] By configuring the angle control part, the puncture device of the present utility model allows the operator to adjust the puncture angle according to the specific anatomical structure of the patient and the puncture method. Through such personalized angle adjustment, not only the puncture failure caused by improper angle is reduced, but also the one-time success rate of puncture is improved, and the vascular injuries such as vascular wall perforation or vasospasm caused by improper angle are reduced. A number of rollers equipped on the inner side of the guiding groove can guide the syringe barrel, and this design reduces the friction of the syringe barrel during puncture, enabling the syringe barrel to enter the blood vessel more smoothly. The linkage of the rotating rod and the guiding groove can also achieve fine adjustment of the puncture angle of the arterial puncture part, further improving the accuracy of the puncture angle.

[0010] According to a preferred embodiment, a collar is sleeved on the end of the rotating rod away from the guiding groove. The surface of the collar is equipped with a pointer whose pointing direction is consistent with the length direction of the guiding groove, and the surface of the support frame is configured with scale marks for displaying the angle of the guiding groove. Through the visual pointer and scale marks, the operator can quickly and accurately adjust and determine the puncture angle, improving the accuracy and convenience of the operation. The dependence on the operator's experience is reduced, enabling even less experienced novices to perform accurate puncture operations and improving the success rate of puncture.

[0011] According to a preferred embodiment, the locking assembly includes a locking member. The locking member can slide along a chute configured on the support frame to move away from or close to the collar. A spring connected to the locking member is also arranged in the chute, so that the locking member can maintain a tendency to move towards the collar under the action of the spring, and the locking member can limit the guiding groove at the current angle by engaging its tip into a gear circumferentially configured on the surface of the collar. The sliding ability of the locking member along the chute provides a flexible locking mechanism, allowing the operator to fine-tune the puncture angle as needed to achieve precise positioning. The setting of the spring ensures that the locking member can have a natural tendency to move towards the collar when not being operated, which improves the reliability of locking. In addition, the tip of the locking member engages into the gear on the surface of the collar. This mechanical locking method has high stability and safety, can prevent angle changes caused by accidental touch or patient movement during puncture, and ensures the accuracy and consistency of the puncture operation. The design of the gear also allows the locking member to select between multiple fixed angles, increasing the adaptability and flexibility of the device.

[0012] According to a preferred embodiment, the angle control part includes an elastic band connected to the support frame. A soft cushion layer is configured in the area of the elastic band corresponding to the bottom surface of the support frame. The elastic characteristic of the elastic band can adapt to the hand sizes and shapes of different operators, facilitating the fixed installation of the angle fixing part at the position where arterial puncture of the patient is required. This design helps to reduce the fatigue caused by long-term operation. The configuration of the soft cushion layer enhances the comfort of the contact part between the patient and the angle fixing part and improves the patient experience.

[0013] According to a preferred embodiment, the arterial puncture portion includes a puncture base, a syringe barrel is detachably inserted into the proximal end of the puncture base, and the syringe barrel is in fluid communication with a stylet disposed at the distal end of the puncture base. The design of detachably inserting the syringe barrel allows for quick replacement of different types or sizes of syringe barrels, improving the convenience and flexibility of operation.

[0014] According to a preferred embodiment, the arterial puncture portion is configured with a cannula base detachably connected to the puncture base, and a retaining cannula with an inner diameter larger than the outer diameter of the stylet is disposed at the distal end of the cannula base, so that the stylet can pass through the inside of the retaining cannula. The detachable connection between the cannula base and the puncture base provides a stable operation platform, making the advancement and retraction of the stylet smoother and reducing vascular damage caused by unstable operation.

[0015] According to a preferred embodiment, a first insertion cylinder is sleeved on the proximal end of the stylet connected to the puncture base, and the first insertion cylinder can be sleeved with a base sleeve disposed at the proximal end of the cannula base. The sleeved structure allows for precise docking between the stylet and the cannula base, ensuring accurate guidance and positioning of the stylet during puncture, thereby improving the accuracy of puncture. This insertion design simplifies the assembly and disassembly process of the puncture portion, facilitates separate cleaning and disinfection of the puncture components, and helps reduce the risk of cross-infection during medical procedures.

[0016] According to a preferred embodiment, a second insertion cylinder with an inwardly converging mouth is formed at the distal end of the syringe barrel, and the second insertion cylinder is sleeved with a puncture sleeve disposed at the proximal end of the puncture base. The inwardly converging mouth design of the second insertion cylinder helps form a tight seal, reducing liquid leakage during puncture and ensuring the sealing performance and safety of the puncture device. In addition, the sleeved structure design provides a stable connection, reducing the displacement or detachment of the syringe barrel caused by unstable connection and ensuring the continuity and reliability of the puncture operation.

[0017] According to a preferred embodiment, wings capable of adhering to the skin surface near the puncture point are disposed on both sides of the cannula base. The design of the wings enables the cannula base to adhere more firmly to the skin surface, reducing the risk of displacement or detachment of the puncture site caused by patient movement or movement during the surgical procedure, and protecting the puncture point from external contamination.

[0018] According to a preferred embodiment, baffles are arranged on both sides of the puncture base, with the extending direction being the same as the direction pointed by the needle core. The surface of the baffle is provided with anti-slip patterns for enhancing friction. The design of the baffle provides additional support for the puncture base, preventing lateral movement during operation, thereby ensuring that the needle core stably punctures along the predetermined direction. When removing the puncture base and the needle core, the baffle becomes the holding part for the operator's fingers, and its anti-slip patterns enhance the grasping feeling, enabling the operator to more precisely control the applied force and direction, and ensuring the smooth removal of the puncture base and the needle core. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the sleeve base and the puncture base of the present utility model from the first perspective before being sleeved;

[0020] Figure 2 is a schematic diagram of the sleeve base and the puncture base of the present utility model from the second perspective before being sleeved;

[0021] Figure 3 is a schematic diagram of the sleeve base and the puncture base of the present utility model after being sleeved;

[0022] Figure 4 is an overall schematic diagram of the angle control part of the present utility model;

[0023] Figure 5 is a partial schematic diagram of the angle control part of the present utility model;

[0024] Figure 6 is a partial schematic diagram of the locking component in the angle control part of the present utility model;

[0025] Figure 7 is a schematic diagram of the arterial puncture part and the angle control part of the present utility model when used in combination.

[0026] List of Reference Numerals

[0027] 100: Arterial puncture part; 110: Sleeve base; 111: Indwelling cannula; 112: Flap; 113: Switch; 114: Base sleeve; 120: Puncture base; 121: Needle core; 122: First insertion cylinder; 123: Baffle; 124: Puncture sleeve; 125: Needle cylinder; 126: Second insertion cylinder; 200: Angle control part; 210: Support frame; 220: Guide groove; 221: Roller; 230: Rotating rod; 240: Collar; 250: Pointer; 260: Locking component; 261: Chute; 262: Spring; 263: Locking piece; 270: Elastic band; 271: Soft cushion layer. Detailed Embodiments

[0028] The present utility model will be described in detail below with reference to the drawings.

[0029] Orientation definition: The end closer to the operator is the proximal end, and the end farther from the operator is the distal end.

[0030] Preferably, as Figure 7 shown, the puncture device of the present utility model, particularly a puncture device for invasive arterial blood pressure monitoring, integrates an arterial puncture part 100 and an angle control part 200, aiming to improve the accuracy and success rate of puncture. The arterial puncture part 100 is designed to puncture the blood vessels of a patient, while the angle control part 200 allows the operator to adjust the puncture angle according to the anatomical structure of the patient's arterial blood vessels and surgical requirements.

[0031] Preferably, as Figure 4 shown, the core component of the angle control part 200 is a support frame 210, which has a bottom plate and two oppositely arranged vertical plates connected to the bottom plate. Rotating rods 230 are penetrated through both vertical plates of the support frame 210, and the rotating rods 230 can freely rotate along their axes, ensuring the flexibility of angle adjustment. Preferably, opposite ends of the two rotating rods 230 are connected to both sides of the same guiding groove 220, so that the guiding groove 220 can rotate synchronously with the rotating rods 230. The guiding groove 220 is in the form of a longitudinally extending groove body, and the axis of the groove body extends along the radial direction of the rotating rod 230. The size design of the guiding groove 220 fully considers the mating relationship with the syringe barrel 125 (as Figure 1 shown). The syringe barrel 125 is a part of the arterial puncture part 100, and the syringe barrel 125 can realize the guiding effect of the angle control part 200 on the arterial puncture part 100 by being arranged inside the guiding groove 220. Specifically, the inner width of the guiding groove 220 is configured to be slightly larger than the outer diameter of the syringe barrel 125, ensuring that the syringe barrel 125 can move freely in the guiding groove 220 without excessive friction. At the same time, this design also allows the syringe barrel 125 to maintain a certain stability in the guiding groove 220 and will not deviate from the predetermined puncture path due to being too loose.

[0032] Preferably, as Figure 4As shown, to further ensure the stability and guiding property of the syringe barrel 125 during the puncture process and reduce the risk of blood vessel injury, a number of rollers 221 are evenly arranged on the inner side wall of the guiding groove 220. Grooves or holes matching the shape of the rollers 221 are formed on the inner side wall of the guiding groove 220, so that the rollers 221 can be fixedly embedded on the inner side wall of the guiding groove 220 to ensure that the rollers 221 will not loosen or fall off during the puncture process. The rolling direction of the rollers 221 is consistent with the puncture direction of the syringe barrel 125, that is, the rotation axis of the rollers 221 is orthogonal to the axis of the syringe barrel 125. This design ensures that these rollers 221 can contact the outer surface of the syringe barrel 125, so that the syringe barrel 125 can smoothly roll along the inner side wall of the guiding groove 220 during the puncture process, and reduces the friction and resistance during the movement process.

[0033] Preferably, as Figure 5 described, one end of the rotating rod 230 away from the guiding groove 220 can be structurally matched with a locking component 260 arranged on the surface of the support frame 210. The locking component 260 is designed to fix the position of the rotating rod 230 when adjusted to an ideal puncture angle, so as to prevent angle deviation during the puncture process. This structural matching mode of the locking component 260 can be selected in various forms such as clamping, plugging or bonding to adapt to different use scenarios and operating habits.

[0034] Preferably, when performing the puncture of an arterial indwelling needle clinically, the tip of the indwelling needle points in the direction opposite to the blood flow direction, and the angle between the needle body and the skin varies according to the patient's body fat. The predetermined angle is generally 15-30°. Selecting an appropriate puncture angle can improve the puncture success rate. The puncture device of the present utility model can intuitively indicate the puncture angle. Specifically, as Figure 5 shown, a collar 240 is sleeved on one end of the rotating rod 230 away from the guiding groove 220. A pointer 250 is arranged on the surface of the collar 240, and it forms an intuitive angle indication by corresponding to the scale marks on the surface of the support frame 210. The scale marks can be a series of arc-shaped or fan-shaped distributed scales, and these scales are distributed along the circumferential direction of the surface of the support frame 210 to form a complete circular or semi-circular scale disk. These arc-shaped scales are in degrees, usually starting from 0°, increasing in a certain angle increment, such as one scale every 5° or every 1° (the accuracy can be designed according to clinical requirements), until reaching the maximum angle required for the puncture operation. Preferably, the pointer 250 always remains consistent with the length direction of the guiding groove 220, which enables the scale mark pointed by the pointer 250 to directly reflect the puncture angle of the arterial puncture part 100 (or the syringe barrel 125) currently placed on the guiding groove 220. This design not only improves the convenience of angle adjustment, but also reduces the dependence on the operator's experience, enabling novices to quickly and accurately perform the puncture operation.

[0035] Preferably, asFigure 5 , Figure 6 As shown, the puncture device of the present utility model is equipped with a locking assembly 260, which cooperates with the rotating rod 230 to adjust and fix the puncture angle. Specifically, the locking assembly 260 mainly includes a locking member 263 and a chute 261 structure that cooperates with it. The locking member 263 is designed to be able to slide freely away from or close to the collar 240 within the chute 261 configured on the vertical plate of the support frame 210. In particular, the locking member 263 can be connected to a spring 262 within the chute 261, and this spring 262 can provide a continuous elastic force to the locking member 263, ensuring that the locking member 263 always has a tendency to move towards the collar 240 without external interference. The locking member 263 can be designed as a long strip structure with a V-shaped protrusion at the tip, and its size can be optimized according to the width and depth of the chute 261 and the required locking force to ensure smooth sliding within the chute 261 without jamming. The special tip design of the locking member 263 is for structural cooperation with the collar 240. The surface of the collar 240 is configured with a gear structure in a circular pattern, and the tip of the locking member 263 can be snapped into the space between two adjacent teeth of this gear structure under the elastic force of the spring 262, thereby preventing the rotation of the collar 240 (i.e., the rotating rod 230), and thus restricting the guiding groove 220 at the current puncture angle. This mechanical locking method has high stability and safety, effectively preventing angle changes caused by accidental contact or patient movement during the puncture process. In particular, by designing the tooth pitch, it is possible to allow the locking member 263 to select between multiple fixed angles by snapping into different teeth, providing flexibility and adaptability in the use of the device. The operator can quickly adjust to a preset angle according to clinical needs, simplifying the operation process and improving the surgical efficiency.

[0036] Preferably, as Figure 4As shown, the angle control unit 200 includes an elastic band 270 connected to the support frame 210. The design of the elastic band 270 allows the operator to adjust its tightening force according to actual needs. The elastic band 270 is made of a highly elastic material, ensuring sufficient elastic recovery force and durability. By adjusting the adjustment device on the elastic band 270, such as a buckle or a sliding knot, the operator can easily fix the angle control unit 200 at an appropriate position on the patient's body and make fine adjustments according to the specific anatomical position of the puncture point to achieve the optimal puncture angle. In the area where the elastic band 270 corresponds to the bottom surface of the support frame 210, a soft cushion layer 271 is specially designed. The soft cushion layer 271 is made of a medical-grade soft material, such as silicone rubber or high-density foam, which can provide additional comfort for the patient during the puncture process. The shape and thickness of the soft cushion layer 271 are carefully designed to minimize the pressure on the patient's skin and the potential risk of injury without affecting the stability of the angle control unit 200. In addition, the surface of the soft cushion layer 271 is designed with a microporous structure or texture to improve the contact air permeability with the patient's skin and reduce the discomfort or pressure sores that may be caused by long-term operation. In addition, the soft cushion layer 271 is easy to clean and disinfect, meeting the strict requirements of medical equipment for hygiene and safety.

[0037] Preferably, as Figure 2 、 Figure 3As shown, the arterial puncture part 100 of the present utility model is designed as a two-piece type that can be spliced. After splicing, a puncture base 120 is provided at the proximal end of the arterial puncture part 100, and a cannula base 110 is provided at the distal end of the arterial puncture part 100. A detachable plug-in structure is designed at the proximal end of the puncture base 120. Specifically, a first plug-in cylinder 122 is sleeved at the proximal end of the puncture base 120, and the design of this first plug-in cylinder 122 is sleeved with the base sleeve 114 configured at the proximal end of the cannula base 110, ensuring a stable connection between the puncture base 120 and the cannula base 110. The design of the syringe barrel 125 also takes into account versatility and interchangeability, adapting to needle cores 121 of different diameters and lengths. A second plug-in cylinder 126 with an inwardly converging opening is formed at the distal end of the syringe barrel 125, and this second plug-in cylinder 126 is sleeved with the puncture sleeve 124 configured at the proximal end of the puncture base 120. The puncture sleeve 124 is a structure configured at the proximal end of the puncture base 120, and its internal design has an inner diameter size matching that of the second plug-in cylinder 126, ensuring that the second plug-in cylinder 126 can be smoothly inserted and form a sealed connection. The outer wall of the puncture sleeve 124 may be designed with protruding ribs or grooves. This design not only ensures a tight connection between the syringe barrel 125 and the puncture base 120, but also enhances the sealing performance of the connection through its inwardly converging structure, effectively preventing liquid leakage or air from entering the vascular system. The syringe barrel 125 is filled with a liquid medium such as physiological saline or sterile heparin sodium saline, forming a fluid channel with the needle core 121 at the distal end of the puncture base 120, ensuring that the needle core 121 remains lubricated during the puncture process and reducing the risk of vascular injury. The connection between the cannula base 110 and the puncture base 120 adopts a detachable design, providing a stable operation platform. A retention cannula 111 with an inner diameter larger than the outer diameter of the needle core 121 is provided at the distal end of the cannula base 110 to ensure that the needle core 121 can pass through the inside of the retention cannula 111 to achieve a smooth puncture action. The material selection of the retention cannula 111 takes into account biocompatibility and chemical corrosion resistance, and generally uses medical-grade polyolefin materials. These materials have good flexibility and stability and are suitable for long-term retention in the body.

[0038] Preferably, the volume of the liquid medium in the syringe 125 exceeds half of the total volume of the syringe 125, and the air volume is less than half of the total volume of the syringe 125. More preferably, the liquid volume is 80% and the air volume is 20%. The operator can lubricate the liquid medium in the syringe 125 and expel the air in the cannula base 110 to prevent the blood from clotting quickly. In addition, the operator can also observe the blood return after arterial puncture with the liquid medium in the syringe 125. Specifically, when the operator selects the puncture angle and performs the puncture, when the needle tip of the stylet 121 enters the arterial blood vessel, the arterial blood will spray into the syringe 125 through the stylet 121, and a "smoke effect" similar to chimney smoking will be formed in the liquid medium of the syringe 125. By observing such a phenomenon, the operator can know that blood return has occurred. Subsequently, the operator can toggle the locking member 263 to move it in the direction close to the spring 262 to release its locking of the rotating rod 230. At the same time, the operator can flatten the puncture angle by 1-2° and then continue to push the arterial puncture part 100 forward by 1-2 mm. When observing blood spraying in the cannula base 110, the operator can push a part of the liquid medium in the syringe 125 to prevent blood clotting and blockage. Finally, the operator can withdraw the stylet 121 and the syringe 125 and clamp the switch 113 on the arterial puncture part 100 at the same time to end the puncture operation. In particular, the switch 113 can be a sliding clip, which can block or open the catheter inside the cannula base 110 by sliding a clip to control the blood flow.

[0039] Preferably, as Figure 2 shown, the two sides of the cannula base 110 are designed with fins 112, and the structural design of these fins 112 enables them to adhere to the skin surface near the puncture point. The fins 112 use a medical-grade adhesive to ensure good adhesion to the skin. Considering the sensitivity of the patient's skin, a low-allergenic material is selected. The design of the fins 112 not only improves the stability of the cannula base 110 at the puncture site, reduces the risk of displacement or detachment caused by patient movement, but also reduces the pressure on the local skin by increasing the contact area with the skin and increases the comfort of the patient.

[0040] Preferably, as Figure 2 shown, the two sides of the puncture base 120 are configured with baffles 123, and the extending direction of these baffles 123 is the same as the direction pointed by the stylet 121, forming a lateral support for the puncture base 120. The design of the baffles 123 takes into account the stability during the operation process, prevents lateral movement, and ensures the stable puncture of the stylet 121 along the predetermined direction. The surface of the baffles 123 is designed with anti-slip patterns, and these patterns increase the friction between the baffles 123 and the operator's fingers, providing a better grip and controllability. In the case of fine operation, the anti-slip patterns ensure that the operator can stably control the puncture base 120 and prevent puncture deviation caused by hand slippage.

[0041] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure of the present utility model, and these solutions also fall within the scope of the disclosure of the present utility model and within the protection scope of the present utility model. Those skilled in the art should understand that the specification and drawings of the present utility model are illustrative and do not constitute a limitation on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional way and should not be understood as being necessarily provided. Therefore, the applicant reserves the right to waive or delete the relevant preferred features at any time.

Claims

1. A puncture device for invasive arterial blood pressure monitoring, comprising an arterial puncture portion (100) for puncturing a patient's blood vessel and an angle control portion (200) for adjusting the puncture angle of the arterial puncture portion (100), characterized in that: The angle control part (200) is provided with a support frame (210), and a rotating rod (230) capable of rotating along its own axis is provided through the support frame (210), one end of the rotating rod (230) is connected to a guide groove (220) capable of rotating synchronously therewith, and the other end can generate structural cooperation with a locking component (260) arranged on the surface of the support frame (210) to achieve locking of the rotating rod (230). When the guide groove (220) is rotated to a predetermined angle, the syringe (125) provided with the arterial puncture section (100) can be placed inside the guide groove (220), so that the arterial puncture section (100) can puncture the patient's blood vessel at a predetermined angle under the guidance of a plurality of rollers (221) provided on the inner wall of the guide groove (220) on the syringe (125).

2. The puncture device according to claim 1, characterized in that: A collar (240) is sleeved on one end of the rotating rod (230) away from the guide groove (220); a pointer (250) pointing in the same direction as the length of the guide groove (220) is provided on the surface of the collar (240); and a scale mark for displaying the angle of the guide groove (220) is provided on the surface of the support frame (210).

3. The puncture device according to claim 2, characterized in that: The locking assembly (260) includes a locking member (263), and the locking member (263) can slide along a slide groove (261) arranged on the support frame (210) to move away from or close to the ring (240). A spring (262) connected to the locking member (263) is also arranged in the slide groove (261), so that the locking member (263) can maintain a tendency to move toward the ring (240) under the action of the spring (262), and the locking member (263) can limit the guide groove (220) to a current angle by clamping its tip into a gear arranged around the surface of the ring (240).

4. The puncture device according to claim 3, characterized in that: The angle control portion (200) comprises an elastic band (270) connected to the support frame (210), and a cushion layer (271) is arranged in an area of ​​the elastic band (270) corresponding to the bottom surface of the support frame (210).

5. The puncture device according to claim 4, characterized in that: The arterial puncture part (100) comprises a puncture base (120), the proximal end of which is detachably plugged with the syringe (125), and the syringe (125) is fluidically connected to a needle core (121) disposed at the distal end of the puncture base (120).

6. The puncture device according to claim 5, characterized in that: The arterial puncture portion (100) is provided with a cannula base (110) detachably connected to the puncture base (120), and the distal end of the cannula base (110) is provided with a retention cannula (111) whose inner diameter is larger than the outer diameter of the needle core (121), so that the needle core (121) can pass through the interior of the retention cannula (111).

7. The puncture device according to claim 6, characterized in that: The proximal end of the needle core (121) connected to the puncture base (120) is sleeved with a first plug-in sleeve (122), and the first plug-in sleeve (122) can be sleeved with a base sleeve (114) configured at the proximal end of the cannula base (110).

8. The puncture device according to claim 5, characterized in that: The distal end of the needle tube (125) forms a second plug-in tube (126) that closes inwards, and the second plug-in tube (126) and the puncture sleeve (124) disposed at the proximal end of the puncture base (120) are sleeved with each other.

9. The puncture device according to claim 6, characterized in that: Wings (112) capable of being bonded to the skin surface near the puncture point are arranged on both sides of the sleeve base (110).

10. The puncture device according to claim 5, characterized in that: Baffles (123) extending in the same direction as the needle core (121) are arranged on both sides of the puncture base (120), and the surfaces of the baffles (123) are arranged with anti-skid patterns for enhancing friction.

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