Ultrasonic probe and puncture device

Abstract

The invention discloses an ultrasonic probe and a puncture device, and relates to the technical field of medical equipment. Comprising a handheld head, the handheld head is provided with a second adapter slot, the handheld head is fixedly connected with a needle body communicated with the second adapter slot, and the handheld head is internally provided with a detection cavity communicated with the second adapter slot; the detection assembly is arranged in the handheld head and used for assisting medical staff in distinguishing arteries and veins, the detection assembly comprises an installation disc which is connected into the detection cavity in a limiting and sliding mode, and a flexible cylinder is fixedly connected between the installation disc and the handheld head. By means of pressure difference in arteries and veins, after puncture is finished, due to the fact that pressure difference exists between blood vessels and the outside, blood pushes the flexible barrel to move, then the arteries and the veins can be distinguished by checking the moving distance of the flexible barrel, the arteries and the veins can still be rapidly distinguished in the mode when a patient is in a death or waiting-to-death state, and therefore the patient can be rapidly distinguished. The efficiency of rescue operation is improved, and the success rate of patients is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to an ultrasonic probe and a puncture device. Background Art

[0002] Puncture is a medical technique of inserting a puncture needle into a body cavity to extract secretions for laboratory tests, injecting gas or contrast agent into the body cavity for contrast examination, or injecting drugs into the body cavity; in the prior art, the puncture technique is usually combined with ultrasonic technology to improve the accuracy of puncture.

[0003] When rescuing critically ill patients using cardiopulmonary bypass technology, it is necessary to insert two vascular drainage tubes into the femoral artery and vein of the patient. Currently, percutaneous puncture is usually used to insert the drainage tubes. After the insertion of the drainage tubes is completed, the existing method usually judges whether the inserted drainage tube is a vein or an artery by observing the color of the blood after pumping out the blood. This method is greatly affected by the subjective consciousness of medical staff and may result in misjudgment; in addition, there is also a method in the prior art to distinguish arteries and veins by observing the blood flow fluctuation in the syringe. However, when the patient is in a state of death or near death, due to the low arterial pressure level of the patient, the blood flow fluctuation in the syringe is not obvious, making it difficult to judge. Summary of the Invention

[0004] The present invention provides an ultrasonic probe and a puncture device to overcome the limitation of the existing method for judging arteries and veins after puncture, which is not conducive to the rapid progress of rescue operations.

[0005] The technical solution is: a puncture device, comprising: A hand-held head, which is provided with a second adapter slot, the hand-held head is fixedly connected with a needle body communicating with the second adapter slot, and a detection cavity communicating with the second adapter slot is arranged in the hand-held head; A detection assembly, arranged in the hand-held head, for assisting medical staff to distinguish arteries and veins, the detection assembly comprising: A mounting plate, which is connected to the detection cavity in a limited sliding manner, a flexible cylinder located in the detection cavity is fixedly connected between the mounting plate and the hand-held head, and the position where the detection cavity communicates with the second adapter slot is located on the side of the mounting plate away from the flexible cylinder.

[0006] Furthermore, a tension spring is fixedly connected between the mounting plate and the hand-held head, a support rod is slidably connected in the hand-held head, and there is friction between the two, and the support rod contacts the mounting plate for squeezing the mounting plate.

[0007] Furthermore, the friction force between the support rod and the hand-held head is greater than the pulling force of the tension spring.

[0008] Furthermore, a limiting ring is fixedly connected to one side of the mounting disc close to the flexible cylinder, and the limiting ring contacts the outer side surface of the flexible cylinder.

[0009] Furthermore, an elastic tab is fixedly connected inside the handheld head, and the elastic tab is used to block the second transfer groove.

[0010] An ultrasonic probe, applying the above-mentioned puncture device, the ultrasonic probe includes: A mounting head, the mounting head is provided with a first transfer groove, the mounting head is threadedly connected to the second transfer groove, the mounting head is fixedly connected with a needle core communicated with the first transfer groove, the needle core is located inside the needle body and is slidably connected thereto, both the needle core and the mounting head are used to squeeze the elastic tab, a communication hole is arranged at the end of the needle core far from the mounting head, and the communication hole is used for allowing external coupling agent to enter the needle core; A rotating head, arranged on one side of the mounting head close to the first transfer groove, the rotating head is fixedly connected with a communication rod located inside the needle core, and there is a gap between the communication rod and the needle core; A side transducer, installed on one side of the communication rod close to the communication hole, and a middle transducer is installed at the end of the communication rod close to the communication hole; A sealing ring piece, arranged on one side of the needle core close to the communication hole, and one side of the sealing ring piece is fixedly connected to the needle core, and the sealing ring piece is used to block the communication hole; An extrusion frame, fixedly connected to one side of the communication rod close to the middle transducer, and the extrusion frame is used to extrude the sealing ring piece.

[0011] Furthermore, the position where the sealing ring piece is fixedly connected to the needle core is on the side close to the mounting head, so that the coupling agent passing through the communication hole moves in the direction close to the central axis of the needle core under the guidance of the sealing ring piece.

[0012] Furthermore, inner and outer planes are respectively arranged on the inner and outer sides of the end of the needle core far from the mounting head, the central axis of the middle transducer passes through the centers of the outer plane and the inner plane, and the surface areas of the outer plane and the inner plane are larger than the end face area of the middle transducer.

[0013] Furthermore, it further includes: A support ring, fixedly connected to the position of the communication rod close to the extrusion frame, and a plurality of circumferentially distributed elastic strips are fixedly connected to the position of the needle core close to the extrusion frame, and the elastic strips are used to limit the support ring.

[0014] Furthermore, an elastic ring is fixedly connected to the position of the needle core close to the support ring. The elastic strip and the elastic ring are respectively located on both sides of the support ring in the axial direction. The elastic ring is used to limit the position of the support ring.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: The present invention utilizes the pressure difference between arteries and veins. After the puncture is completed, due to the pressure difference between the blood vessel and the outside world, the blood pushes the flexible cylinder to move. Subsequently, by checking the moving distance of the flexible cylinder, arteries and veins can be distinguished. This method can still quickly distinguish arteries and veins when the patient is in a dead or dying state, improving the efficiency of rescue operations and increasing the success rate of patients.

[0016] Using the elastic tab as a one-way valve to maintain the pressure inside the needle body after puncture, reducing the probability of blood spraying out through the needle body, and thus reducing the damage to the patient.

[0017] Utilizing the connection between the syringe and the first transfer groove to form a negative pressure inside the needle core, and then sucking the external coupling agent into the needle core. Subsequently, when assembling the device before the operation, both the side transducer and the middle transducer can be immersed in the coupling agent. In this way, the coupling agent fills the gap between the side transducer and the needle core, reducing the influence of the air in the gap on the ultrasonic imaging effect, enhancing the ultrasonic imaging effect, and improving the accuracy of puncture.

[0018] Using the elastic strip and the elastic ring to limit the position of the support ring, maintaining the stable position of the side transducer and the middle transducer inside the needle core. At the same time, the elastic ring contacts and fits with the support ring to seal the lower end position inside the needle core, reducing the probability of the coupling agent flowing inside the needle core during the puncture process, and thus maintaining the filling effect of the coupling agent on the gap between the side transducer and the middle transducer and the needle core, and maintaining the stability of the ultrasonic imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is an exploded three-dimensional structural diagram of the mounting head, the rotating head and the needle body of the present invention; Figure 3 is a three-dimensional structural sectional view of the hand-held head and the needle body of the present invention; Figure 4 is a three-dimensional structural sectional view of the mounting head and the hand-held head of the present invention; Figure 5 is for the attachment of the present invention Figure 4 the enlarged view of part A in; Figure 6 is for the attachment of the present invention Figure 4 the enlarged view of part B in; Figure 7 is a three-dimensional structural sectional view of the needle core and the extrusion frame of the present invention; Figure 8 An enlarged view of the position C in the attached drawing of the present invention; Figure 2 for the present invention. Figure 9 A cross-sectional view of the three-dimensional structure of the elastic tab and the flexible cylinder of the present invention.

[0020] Reference numerals in the attached drawing: 1 - mounting head, 101 - first transfer groove, 2 - needle core, 201 - communication hole, 202 - outer plane, 203 - inner plane, 3 - rotating head, 4 - communication rod, 5 - side transducer, 6 - middle transducer, 7 - sealing ring piece, 8 - extrusion frame, 9 - support ring, 10 - elastic strip, 11 - elastic ring, 12 - hand-held head, 121 - second transfer groove, 13 - needle body, 14 - elastic tab, 15 - mounting disc, 16 - flexible cylinder, 161 - detection cavity, 17 - tension spring, 18 - support rod, 19 - limiting ring. Detailed implementation manners

[0021] The present invention will be further described in detail below in conjunction with the attached drawings and specific implementation manners. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0022] An ultrasonic probe, please refer to Figures 1 - 7, including: an installation head 1, the installation head 1 is provided with a first transfer groove 101 for communicating with an external syringe, the installation head 1 is fixedly connected with a needle core 2 communicating with the first transfer groove 101, the end of the needle core 2 far away from the installation head 1 is provided with a communication hole 201 for allowing external coupling agent to enter the needle core 2; a rotating head 3 is arranged on one side of the installation head 1 close to the first transfer groove 101, the rotating head 3 is fixedly connected with a communication rod 4 located inside the needle core 2, and there is a gap between the communication rod 4 and the needle core 2; a side transducer 5 is installed on one side of the communication rod 4 close to the communication hole 201, and a middle transducer 6 is installed at the end of the communication rod 4 close to the communication hole 201; a sealing ring piece 7 is arranged on one side of the needle core 2 close to the communication hole 201, and one side of the sealing ring piece 7 is fixedly connected with the needle core 2, and the sealing ring piece 7 is used to block the communication hole 201; a pressing frame 8 is fixedly connected to one side of the communication rod 4 close to the middle transducer 6, and the pressing frame 8 is used to press the sealing ring piece 7; the position where the sealing ring piece 7 is fixedly connected with the needle core 2 is on the side close to the installation head 1, so that the coupling agent passing through the communication hole 201 moves towards the direction close to the central axis of the needle core 2 under the guidance of the sealing ring piece 7; inner and outer planes 203 and 202 are respectively arranged on the inner and outer sides of the end of the needle core 2 far away from the installation head 1, the central axis of the middle transducer 6 passes through the centers of the outer plane 202 and the inner plane 203, and the surface areas of the outer plane 202 and the inner plane 203 are larger than the end face area of the middle transducer 6.

[0023] In the above solution, it aims to solve the problem that there are gaps and air between the ultrasonic probe and the accommodating part during the puncture operation, resulting in poor ultrasonic imaging effect and affecting the normal progress of the puncture operation; in this solution, the syringe is connected with the first transfer groove 101 to form negative pressure inside the needle core 2, and then the external coupling agent is sucked into the needle core 2. Subsequently, when assembling the device before the operation, the side transducer 5 and the middle transducer 6 can be immersed in the coupling agent. In this way, the coupling agent fills the gap between the side transducer 5 and the needle core 2, reducing the influence of the air in the gap on the ultrasonic imaging effect, enhancing the ultrasonic imaging effect, and improving the puncture accuracy.

[0024] The number of communication holes 201 can be adjusted according to the actual situation. Here, there are three communication holes 201 evenly distributed circumferentially; the side surface of the lower part of the needle core 2 is arc-shaped, which is used to reduce the probability of the needle core 2 causing harm to the patient during the process of following the puncture needle into the patient's body; anti-slip grooves are provided on the circumferences of the mounting head 1 and the rotating head 3, and the outer diameter of the rotating head 3 is larger than that of the mounting head 1, which is convenient for medical staff to rotate the rotating head 3; an interface electrically connected to an external ultrasonic imaging instrument is provided on the upper side of the rotating head 3, and the side transducer 5 and the middle transducer 6 can be electrically connected to the interface of the rotating head 3 through wires passing through the communication rod 4; the projections of the three communication holes 201 on the end surface of the communication rod 4 do not intersect with the projection of the middle transducer 6 on the end surface of the communication rod 4; the sealing ring piece 7 can be made of elastic rubber, and initially, the sealing ring piece 7 fits with the inner side of the needle core 2 and blocks the three communication holes 201; the inner plane 203 and the outer plane 202 can make the thickness of the needle core 2 corresponding to each part of the middle transducer 6 consistent, reducing the influence of the thickness of the needle core 2 on the working efficiency of the middle transducer 6; the extrusion frame 8 is used to extrude the sealing ring piece 7 to enhance the sealing effect between the sealing ring piece 7 and the needle core 2.

[0025] The position where the sealing ring piece 7 is fixedly connected to the needle core 2 is on the side close to the mounting head 1, so that the coupling agent passing through the communication hole 201 moves in the direction close to the central axis of the needle core 2 under the guidance of the sealing ring piece 7, making the flow path of the coupling agent in the needle core 2 more "smooth", reducing the fluctuation of the coupling agent during the flow in the needle core 2, and further reducing the probability of bubbles in the coupling agent inside the needle core 2.

[0026] Please refer to Figure 6 and Figure 7 , and further includes: a support ring 9 fixedly connected to the communication rod 4 near the extrusion frame 8, and a plurality of elastic strips 10 distributed circumferentially are fixedly connected to the needle core 2 near the extrusion frame 8. The elastic strips 10 are used to limit the support ring 9; an elastic ring 11 is fixedly connected to the needle core 2 near the support ring 9. The elastic strips 10 and the elastic ring 11 are respectively located on both sides of the support ring 9 in the axial direction, and the elastic ring 11 is used to limit the support ring 9.

[0027] In the above solution, it is intended to limit the support ring 9 by using the elastic strip 10 and the elastic ring 11 to keep the positions of the side transducer 5 and the middle transducer 6 stable within the needle core 2. At the same time, the elastic ring 11 contacts and fits with the support ring 9 to seal the position at the lower end inside the needle core 2, reducing the probability of the coupling agent flowing inside the needle core 2 during the puncture process. Furthermore, it maintains the filling effect of the coupling agent in the gap between the side transducer 5 and the middle transducer 6 and the needle core 2, keeping the ultrasonic imaging effect stable; the outer diameter of the support ring 9 is larger than the inner diameters of the elastic strip 10 and the elastic ring 11, and the outer diameter of the support ring 9 is smaller than the inner diameter of the needle core 2. The number of elastic strips 10 can be adjusted according to the actual situation. In this article, there are six elastic strips 10 distributed at equal circumferential intervals, and there are gaps between adjacent elastic strips 10. The gaps between adjacent elastic strips 10 are used for the excess coupling agent at the lower part of the needle core 2 to flow upward; after the support ring 9 moves downward and crosses the six elastic strips 10, the elastic strip 10 and the elastic ring 11 contact the support ring 9 at the same time, and the communication rod 4 is kept in the middle of the needle core 2 by the extrusion of the circumferential arc surfaces of the support ring 9, the elastic strip 10 and the elastic ring 11.

[0028] The working principle of the above ultrasonic probe is as follows: During the puncture operation, the medical staff first connect the syringe to the first transfer groove 101 (please refer to the appendix for the initial state of this device). Figure 2 Subsequently, the lower end of the needle core 2 is immersed in the coupling agent, and the syringe is pulled to create a negative pressure inside the needle core 2. As a result, the external coupling agent enters the needle core 2 through the three communication holes 201. After the coupling agent passes through the communication holes 201, the coupling agent pushes the sealing ring piece 7 to deform, so that the position of the outer ring surface of the sealing ring piece 7 close to the central axis of the needle core 2 loses contact with the needle core 2. At this time, the coupling agent flows through the gap between the sealing ring piece 7 and the needle core 2 towards the direction close to the central axis of the needle core 2 and gradually fills the inside of the needle core 2 from bottom to top. In this way, the gas at the lower part of the needle core 2 is squeezed out. After the coupling agent in the needle core 2 covers the elastic ring 11, stop pulling the syringe and disconnect the syringe from the first transfer groove 101. The sealing ring piece 7 restores its shape under its own elastic force and blocks the three communication holes 201 again.

[0029] After the syringe is separated from the first adapter groove 101, the medical staff inserts the communication rod 4 into the needle core 2, and the communication rod 4 drives the side transducer 5, the middle transducer 6, the extrusion frame 8 and the support ring 9 to move downward. The middle transducer 6 and the extrusion frame 8 first contact the coupling agent in the needle core 2, and then the middle transducer 6 and the support ring 9 are immersed in the coupling agent in turn. During this process, the coupling agent in the needle core 2 flows upward along the gap between the needle core 2 and the communication rod 4. As the communication rod 4 continues to be inserted, the support ring 9 contacts the six elastic strips 10 and squeezes the elastic strips 10 to deform. During this process, the coupling agent in the needle core 2 located below the support ring 9 passes through the two adjacent elastic strips 1 0 continues to flow upward, and then after the support ring 9 passes over the elastic strip 10, the support ring 9 contacts the elastic ring 11 and forms a seal, and the six elastic strips 10 are reset under the action of their own elasticity. While the support ring 9 contacts the elastic ring 11, the extrusion frame 8 contacts the sealing ring sheet 7 and squeezes the sealing ring sheet 7 to deform, thereby enhancing the sealing effect between the sealing ring sheet 7 and the needle core 2. In this way, the coupling agent at the bottom of the needle core 2 is isolated by the sealing of the support ring 9 and the elastic ring 11 and the blocking of the connecting hole 201 by the sealing ring sheet 7. In this way, during the puncture process, the coupling agent is kept wrapped around the side transducer 5 and the middle transducer 6, thereby completing the installation of the communication rod 4.

[0030] After completing the installation of the communication rod 4, the medical staff cleans the coupling agent remaining at the lower end of the needle core 2 and the connecting hole 201, and then electrically connects the wire of the ultrasonic imaging instrument to the interface on the rotating head 3, and then completes the assembly of the device. In the subsequent puncture operation, the ultrasonic probe is inserted into the puncture needle, and the rotating head 3 is rotated during the puncture process. The rotating head 3 drives the side transducer 5 to rotate circumferentially through the communication rod 4, and obtains image information within the circumferential range of the puncture site through the side transducer 5, and obtains information at the distal end of the puncture site through the middle transducer 6. After the puncture is completed, the above steps are repeated in reverse to separate the ultrasonic probe from the puncture needle and the communication rod 4 from the needle core 2. During this process, the communication rod 4 drives the support ring 9 to move upward and squeezes the elastic strip 10 to deform. After the support ring 9 loses contact with the elastic strip 10, the elastic strip 10 is reset under its own elastic action. Then the medical staff cleans the needle core 2, the communication rod 4, the side transducer 5 and the middle transducer 6 for next use.

[0031] A puncture device, using an ultrasound probe as mentioned above, please refer to Figures 1 - 3 , Figure 8 and Figure 9, the puncture device includes: a hand-held head 12, the hand-held head 12 is provided with a second transfer groove 121, the hand-held head 12 is fixedly connected with a needle body 13 communicating with the second transfer groove 121, the mounting head 1 is threadedly connected with the second transfer groove 121, and the needle core 2 is located in the needle body 13 and is slidably connected thereto; an elastic tab 14 is fixedly connected inside the hand-held head 12, the elastic tab 14 is used to block the second transfer groove 121, and both the needle core 2 and the mounting head 1 are used to squeeze the elastic tab 14.

[0032] In the above solution, it is intended to use the elastic tab 14 as a one-way valve to maintain the pressure inside the needle body 13 after puncture, reduce the probability of blood spraying out through the needle body 13, and thus reduce the damage caused to the patient; an arc surface is provided on the circumferential side of the hand-held head 12, and convex ribs are provided on the surface of the arc surface to increase the friction between the medical staff's hand and the hand-held head 12 for easy gripping by the medical staff; the hand-held head 12 is entirely made of transparent plastic material, and here the material of the hand-held head 12 is polypropylene; the second transfer groove 121 can be connected to a medical pipeline to achieve purposes such as blood transfusion and drug administration; the needle core 2 fits with the needle body 13 to enhance the strength of the needle body 13 and reduce the probability of the needle body 13 bending during puncture.

[0033] The elastic tab 14 is made of elastic rubber material, and a cross-shaped crack is provided in the middle of the elastic tab 14. When the mounting head 1 is not installed in the second transfer groove 121, the cross-shaped crack in the middle of the elastic tab 14 is in a closed state (please refer to the appendix Figure 8 ), in this state, the elastic tab 14 cuts off the second transfer groove 121. After the mounting head 1 is installed in the second transfer groove 121, the middle of the elastic tab 14 is squeezed by the mounting head 1 and the needle core 2, so that the cross-shaped crack of the elastic tab 14 is in an open state (please refer to the appendix Figure 9 ), in this state, the second transfer groove 121 can communicate with the needle body 13; the middle of the elastic tab 14 protrudes downward, so that the cross-shaped crack of the elastic tab 14 acts as a one-way valve communicating from top to bottom when closed; after the puncture is completed, when connecting a medical pipeline to the second transfer groove 121 for blood transfusion and drug administration, the medical pipeline is the same as the connector at the lower end of the mounting head 1, so that the medical pipeline can also squeeze the elastic tab 14 and open the cross-shaped crack of the elastic tab 14.

[0034] Please refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 9, further comprising a detection component disposed in the handheld head 12 for assisting medical staff in distinguishing arteries and veins. The detection component includes: a mounting disc 15. A detection cavity 161 communicating with the second transfer groove 121 is provided in the handheld head 12. The mounting disc 15 is connected in a limited sliding manner in the detection cavity 161. A flexible cylinder 16 located in the detection cavity 161 is fixedly connected between the mounting disc 15 and the handheld head 12. The position where the detection cavity 161 communicates with the second transfer groove 121 is on the side of the mounting disc 15 away from the flexible cylinder 16; a tension spring 17 fixedly connected between the mounting disc 15 and the handheld head 12; a support rod 18 slidably connected in the handheld head 12 and having friction therebetween. The support rod 18 contacts the mounting disc 15 for pressing the mounting disc 15; the friction between the support rod 18 and the handheld head 12 is greater than the pulling force of the tension spring 17; a limiting ring 19 is fixedly connected to the side of the mounting disc 15 close to the flexible cylinder 16, and the limiting ring 19 contacts the outer side surface of the flexible cylinder 16.

[0035] When using cardiopulmonary bypass technology to rescue critically ill patients, two vascular drainage tubes need to be inserted into the femoral artery and vein of the patient. Currently, percutaneous puncture is usually used to insert the drainage tubes. After the insertion of the drainage tubes is completed, the existing method usually judges whether the inserted drainage tube is a vein or an artery by observing the color of the blood after the blood is drawn out. This method is greatly affected by the subjective consciousness of medical staff and misjudgment may occur; in addition, there is also a method of distinguishing arteries and veins by observing the blood flow fluctuation in the syringe in the existing technology. However, when the patient is in a state of death or near death, due to the low arterial pressure level of the patient, the blood flow fluctuation in the syringe is not obvious, making it difficult to judge.

[0036] In the above scheme, it is intended to solve the problem that the existing method of judging arteries and veins after puncture is limited and is not conducive to the rapid rescue operation; this scheme uses the pressure difference in the arteries and veins. After the puncture is completed (the end of puncture means that the puncture needle and the blood vessel are connected), due to the pressure difference between the blood vessel and the outside world, the blood pushes the flexible tube 16 to move, and then the arteries and veins can be distinguished by checking the moving distance of the flexible tube 16. This method can quickly distinguish arteries and veins when the patient is in a state of death or dying, improves the efficiency of rescue surgery, and increases the success rate of patients; the outer side of the flexible tube 16 can be set to a bright color, blue is selected here, and when the mounting plate 15 is pushed by blood and moves, the flexible tube 16 can be compressed, so that medical staff can check the length of the flexible tube 16 Determine the position of the mounting plate 15; initially, the tension spring 17 is in a stretched state. When the mounting plate 15 moves a quarter of the limit distance (the limit distance refers to the maximum distance that the mounting plate 15 can move in the detection chamber 161), the elastic force of the tension spring 17 is restored. If the mounting plate 15 continues to move upward and compresses the tension spring 17, it means that the needle body 13 is connected to the artery; if the mounting plate 15 stops, it means that the needle body 13 is connected to the vein (the normal arterial pressure is 120 mmHg, and the venous pressure is close to 0 mmHg; the arterial residual pressure under extreme conditions such as cardiac arrest or shock is 20 mmHg, and the venous pressure is close to 0 mmHg); the limit ring 19 is used to limit the deformation direction of the flexible tube 16, reducing the probability that the flexible tube 16 enters between the mounting plate 15 and the handheld head 12 and increases the friction between the two.

[0037] The working principle of the above-mentioned puncture device is as follows: when performing a puncture operation, the above-mentioned ultrasonic probe is inserted into the needle body 13. During the process of inserting the needle core 2 into the needle body 13, the needle core 2 contacts the middle part of the elastic protrusion 14 and squeezes the middle part of the elastic protrusion 14 to deform, so that the needle core 2 passes through the middle part of the elastic protrusion 14 and continues to move. After the mounting head 1 enters the second adapter groove 121, the mounting head 1 squeezes the middle part of the elastic protrusion 14 and opens the cross-shaped crack in the middle part of the elastic protrusion 14 until the mounting head 1 is threadedly connected to the second adapter groove 121. At this point, the ultrasonic probe and the puncture device are assembled.

[0038] After the ultrasonic probe is inserted into the needle body 13, puncture is performed. With the assistance of the ultrasonic probe, the needle body 13 is inserted into the blood vessel. Then the medical staff disconnects the mounting head 1 from the handheld head 12 and pulls the ultrasonic probe out of the needle body 13. At this time, the elastic protrusion 14 loses the squeezing of the mounting head 1 and the needle core 2 in turn. The elastic protrusion 14 is reset under the action of its own elastic force, and the cross-shaped crack in the middle of the elastic protrusion 14 is reclosed, and the connecting hole 201 is isolated, preventing the blood in the blood vessel from flowing out through the needle body 13 and the connecting hole 201.

[0039] After the ultrasonic probe is disengaged from the puncture device, the medical staff pulls the support rod 18 upward, causing the support rod 18 to lose the extrusion on the mounting plate 15. At this time, the mounting plate 15 moves upward under the pulling force of the tension spring 17 (to prevent the mounting plate 15 from being stationary for a long time and being difficult to move). The pressure in the detection chamber 161 decreases, causing the blood in the blood vessel to flow along the needle body 13 into the detection chamber 161. After the mounting plate 15 moves a quarter of the limit distance, the pulling force of the tension spring 17 disappears. If the needle body 13 is connected to the artery, under the action of the arterial pressure, the blood will continue to enter the detection chamber 161 through the needle body 13, causing the mounting plate 15 to continue to move upward and compress the tension spring 17, reducing the axial length of the flexible cylinder 16. At this time, the medical staff can judge that this is an artery based on the axial length of the flexible cylinder 16. If the needle body 13 is connected to the vein, under the action of the venous pressure, the blood stops flowing into the detection chamber 161, causing the mounting plate 15 to stop moving and the axial length of the flexible cylinder 16 to stop changing. At this time, the medical staff can judge that this is a vein. In this way, the artery and vein can be quickly judged, saving the rescue time and increasing the success rate of the patient.

[0040] During the movement of the mounting plate 15, wrinkles appear on the side of the flexible cylinder 16, causing the flexible cylinder 16 to stack. Under the guidance of the limit ring 19, the position of the flexible cylinder 16 close to the gap between the limit ring 19 and the hand-held head 12 always deforms towards the direction of the central axis of the hand-held head 12. In this way, the probability of the flexible cylinder 16 entering the gap between the mounting plate 15 and the hand-held head 12 is reduced, maintaining the degree of matching between the moving distance of the mounting plate 15 and the blood pressure, and thus maintaining the accuracy of the medical staff in distinguishing arteries and veins.

[0041] After the medical staff knows the artery and vein, the hand-held head 12 is connected to the medical pipeline according to the patient's condition. During the connection process, the connector on the medical pipeline squeezes the elastic tab 14, reopening the cross-shaped crack in the middle of the elastic tab 14, and performing blood transfusion or drug administration operations. After the first aid is over, the needle body 13 is pulled out of the patient's body and destroyed according to the regulations.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A puncture device, characterized in that: include: A handheld head (12), the handheld head (12) being provided with a second adapter groove (121), the handheld head (12) being fixedly connected with a needle body (13) communicating with the second adapter groove (121), and a detection cavity (161) communicating with the second adapter groove (121) being provided inside the handheld head (12); A detection component is arranged in the handheld head (12) and is used to assist medical personnel in distinguishing arteries and veins. The detection component comprises: The mounting plate (15) is connected in a limited sliding manner in the detection cavity (161); a flexible tube (16) located in the detection cavity (161) is fixedly connected between the mounting plate (15) and the handheld head (12); and a position where the detection cavity (161) communicates with the second adapter groove (121) is located on a side of the mounting plate (15) away from the flexible tube (16).

2. A puncture device according to claim 1, characterized in that: A tension spring (17) is fixedly connected between the mounting plate (15) and the hand-held head (12), a support rod (18) is slidably connected inside the hand-held head (12), and friction exists between the two, the support rod (18) is in contact with the mounting plate (15), and is used to press the mounting plate (15).

3. A puncture device according to claim 2, characterized in that: The friction force between the support rod (18) and the handheld head (12) is greater than the tension of the tension spring (17).

4. A puncture device according to claim 3, characterized in that: A limiting ring (19) is fixedly connected to one side of the mounting plate (15) close to the flexible tube (16), and the limiting ring (19) is in contact with the outer side surface of the flexible tube (16).

5. A puncture device according to claim 4, characterized in that: An elastic protrusion (14) is fixedly connected inside the handheld head (12), and the elastic protrusion (14) is used to block the second adapter groove (121).

6. An ultrasonic probe, using the puncture device according to claim 5, characterized in that: include: A mounting head (1), the mounting head (1) being provided with a first adapter groove (101), the mounting head (1) being threadedly connected to the second adapter groove (121), the mounting head (1) being fixedly connected to a needle core (2) communicating with the first adapter groove (101), the needle core (2) being located in the needle body (13) and slidably connected thereto, the needle core (2) and the mounting head (1) both being used to press the elastic protrusion (14), the end of the needle core (2) away from the mounting head (1) being provided with a communication hole (201), the communication hole (201) being used to allow an external coupling agent to enter the needle core (2); A rotating head (3) is arranged on a side of the mounting head (1) close to the first adapter groove (101), the rotating head (3) being fixedly connected to a communication rod (4) located in the needle core (2), and a gap is present between the communication rod (4) and the needle core (2); A side transducer (5) is mounted on a side of the communication rod (4) close to the communication hole (201); a middle transducer (6) is mounted on an end of the communication rod (4) close to the communication hole (201); A sealing ring sheet (7) is arranged on a side of the needle core (2) close to the communication hole (201), and one side of the sealing ring sheet (7) is fixedly connected to the needle core (2), and the sealing ring sheet (7) is used to cover the communication hole (201); An extrusion frame (8) is fixedly connected to a side of the communication rod (4) close to the middle transducer (6), and the extrusion frame (8) is used to extrude the sealing ring sheet (7).

7. An ultrasonic probe according to claim 6, characterized in that: The position where the sealing ring sheet (7) is fixedly connected to the needle core (2) is located on a side thereof close to the mounting head (1), so that the coupling agent passing through the connecting hole (201) moves in a direction close to the central axis of the needle core (2) under the guidance of the sealing ring sheet (7).

8. An ultrasonic probe according to claim 7, characterized in that: An inner plane (203) and an outer plane (202) are respectively provided on the inner and outer sides of the end of the needle core (2) away from the mounting head (1); the central axis of the middle transducer (6) passes through the center of the outer plane (202) and the inner plane (203); and the surface areas of the outer plane (202) and the inner plane (203) are greater than the area of ​​the end face of the middle transducer (6).

9. An ultrasonic probe according to claim 8, characterized in that: Also includes: A support ring (9) is fixedly connected to a position of the communication rod (4) close to the extrusion frame (8), and a plurality of circumferentially distributed elastic strips (10) are fixedly connected to a position of the needle core (2) close to the extrusion frame (8), wherein the elastic strips (10) are used to limit the support ring (9).

10. An ultrasonic probe according to claim 9, characterized in that: An elastic ring (11) is fixedly connected to the needle core (2) at a position close to the support ring (9); the elastic strip (10) and the elastic ring (11) are respectively located on two axial sides of the support ring (9); and the elastic ring (11) is used to limit the position of the support ring (9).

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