A device for real-time monitoring of central venous pressure

Abstract

The present invention is applicable to the technical field of medical devices and provides a device for real-time monitoring of central venous pressure; the central venous pressure device includes: a central venous catheter connector, one end of the central venous catheter connector is connected to a central venous catheter; an infusion tube; a fixing component, and there are three fixing components. In the present invention, the pressure sensor is manually operated to drive the rectangular frame into the central venous pressure sensor connector. When the surface of the pressure sensor contacts the inner surface of the central venous pressure sensor connector, the first spring will drive the conical block into the first through hole opened inside the rectangular frame to perform quick installation and automatic self-locking processing on the pressure sensor and the central venous pressure sensor connector, preventing the device from falling off due to external forces during use, thereby improving the installation portability and firmness of the product during actual use.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a device for real-time monitoring of central venous pressure. Background Art

[0002] Central venous pressure is the pressure at the entry of the superior and inferior vena cava into the right atrium, which is measured through a catheter placed in the superior or inferior vena cava or the right atrium. It is one of the main indicators for clinical observation of hemodynamics. Currently, the catheter method based on the principle of communicating vessels is mainly used in clinical practice to measure central venous pressure. This method is relatively complex to measure, has a risk of air embolism, and cannot perform real-time monitoring of the patient's central venous pressure.

[0003] For example, in a central venous pressure measuring device in Chinese patent document (CN201046117Y), it mainly solves the disadvantages of the existing central venous pressure measuring method, such as cumbersome device installation, complex operation, and the inability of the whole device to move at any time with the change of the patient's body position. This utility model includes a three-way joint with a switch, a measuring tube marked with scale lines, and an infusion tube. Among them, two ports in the three-way joint are respectively connected to the measuring tube and the infusion tube. This utility model has the advantages of simple structure and convenient installation. However, during the use of this device, since the infusion tube is a disposable item and needs to be replaced, the operation is relatively cumbersome during the replacement and fixation of the infusion tube and the measuring tube, and the sealing performance is poor, resulting in an impact on the measurement accuracy of the central venous pressure of the device.

[0004] In addition, in the existing devices for monitoring central venous pressure, due to numerous and cross-wound pipelines, the infusion tube is often bent by external force, resulting in blocked measurement. Therefore, it is necessary to separately rely on a third-party device or a third-party staff for auxiliary operation, which increases the number of overall carrying equipment, makes the use cumbersome and the detection inaccurate. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a device for real-time monitoring of central venous pressure, aiming to solve the problem of quickly disassembling and installing the measuring tube and the infusion tube, and at the same time ensuring the connection sealing performance between the pipelines.

[0006] The embodiments of the present invention are implemented as follows. A device for real-time monitoring of central venous pressure, the central venous pressure device includes:

[0007] A central venous catheter joint, one end of the central venous catheter joint is communicated with a central venous catheter;

[0008] An infusion tube, one end of the infusion tube is communicated with the central venous catheter joint, and the infusion tube is arranged on the side away from the central venous catheter;

[0009] Wherein, the other end of the infusion tube is connected to an infusion set adapter, one side of the infusion tube is provided with a measuring tube, the measuring tube is a flexible tube, one end of the measuring tube is connected to a central venous catheter adapter, the other end of the measuring tube is connected to a central venous pressure sensor adapter, the other side of the central venous pressure sensor adapter is connected to a pressure sensor, and the pressure sensor is electrically connected to an external display and an alarm through a wire;

[0010] Fixing components, there are three fixing components, and the three fixing components are respectively arranged inside the central venous catheter adapter, the infusion set adapter and the central venous pressure sensor adapter;

[0011] Bending resistance component, the bending resistance component is arranged above the measuring tube.

[0012] As a further limitation of the technical solution of the embodiment of the present invention, the bottoms of the central venous catheter adapter, the infusion set adapter and the central venous pressure sensor adapter are arc-shaped, and the fixing components include:

[0013] First cavities, there are two first cavities, and the two first cavities are symmetrically arranged inside the central venous catheter adapter, the infusion set adapter and the central venous pressure sensor adapter respectively;

[0014] First springs, one side of each first spring is fixedly connected to the inner wall of the central venous catheter adapter, the infusion set adapter and the central venous pressure sensor adapter, the other side of the first spring is fixedly connected to a sliding plate, and the sliding plate is slidably connected inside the first cavity;

[0015] Conical blocks, one side of each conical block is fixedly connected to the sliding plate, and the conical blocks are arranged on the side far from the first springs;

[0016] Rectangular frames, one side of each rectangular frame is fixedly connected to the pressure sensor and the central venous catheter, and the rectangular frames are slidably connected inside the first cavities. First through holes are formed inside the rectangular frames, and the first through holes are engaged with the conical blocks.

[0017] Connection blocks, the bottoms of the connection blocks are fixedly connected to the tops of the sliding plates.

[0018] First tapered blocks, the bottoms of the first tapered blocks are fixedly connected to the tops of the connection blocks, second tapered blocks are arranged on the tops of the first tapered blocks, a fixing block is fixedly connected to the center of the tops of the second tapered blocks, and a pressing plate is fixedly connected to the top of the fixing block;

[0019] Second springs, there are two second springs, and the two second springs are symmetrically arranged on both sides of the fixing block. The two sides of each second spring are respectively fixedly connected to the pressing plate and the inner walls of the central venous catheter adapter, the infusion set adapter and the central venous pressure sensor adapter.

[0020] As a further limitation of the technical solution of the embodiment of the present invention, a sealing component is provided on one side of the fixing component, and a plurality of sealing components are respectively arranged inside the central venous catheter connector, the infusion set connector and the central venous pressure sensor connector. The sealing component includes:

[0021] A second cavity, which is arranged inside the central venous catheter connector, the infusion set connector and the central venous pressure sensor connector;

[0022] A third spring, one side of which is fixedly connected to the inner wall of the central venous catheter connector, the infusion set connector and the central venous pressure sensor connector, and the other side of the third spring is fixedly connected with a sliding block, and the sliding block is slidably connected inside the second cavity;

[0023] A connecting rod, one end of which is fixedly connected to the sliding block, and the other end of the connecting rod is fixedly connected with an annular sealing layer. The annular sealing layer is arranged on the inner peripheral side of the pressure sensor and the central venous catheter, and both the annular sealing layer and the connecting rod are slidably sealed inside the second cavity;

[0024] A first airbag, which is arranged inside the second cavity, and both sides of the first airbag are fixedly connected to the sliding block, the inner wall of the central venous catheter connector, the infusion set connector and the central venous pressure sensor connector respectively. One side of the first airbag is communicated with an air delivery pipe;

[0025] A second airbag, one side of which is communicated with the air delivery pipe. The second airbag is arranged inside the first cavity, and both sides of the second airbag are fixedly connected to the sliding plate, the inner wall of the central venous catheter connector, the infusion set connector and the central venous pressure sensor connector respectively.

[0026] As a further limitation of the technical solution of the embodiment of the present invention, valves are provided on both the infusion tube and the measuring tube. A valve core is rotatably connected inside the valve body, and a valve rod is fixedly connected to the top of the valve core. The top end of the valve rod extends to the outside of the valve body and is fixedly connected with a turning handle.

[0027] As a further limitation of the technical solution of the embodiment of the present invention, there is one bending resistance component, and the bending resistance component is located on the top of the valve body on the measuring tube. The bending resistance component includes:

[0028] A fixed box, the bottom of which is fixedly connected to the top of the valve body, and the fixed box is rotatably connected to the outer periphery of the valve rod through a bearing;

[0029] A double-headed convex block, which is fixedly connected to the outer periphery of the valve rod and is arranged inside the fixed box;

[0030] Arc-shaped plates, there are two arc-shaped plates, and the two arc-shaped plates are symmetrically arranged on the outer periphery of the double-headed convex block;

[0031] A liquid sac, one side of the liquid sac is fixedly connected to the arc-shaped plate, and the other side of the liquid sac is fixedly connected to the inner wall of the fixed box.

[0032] One side of the liquid sac is communicated with an infusion tube, the other end of the infusion tube is communicated with an annular frame, the inner peripheral side of the annular frame is fixedly connected to the outer wall of the measuring tube, an annular cavity is formed inside the annular frame, and the outer peripheral side of the annular cavity is communicated with a plurality of water outlets, the water outlets are located inside the annular frame, an outer sleeve is arranged on the outer peripheral side of the annular frame, both ends of the outer sleeve are fixedly connected to the outer walls of the valve body, the central venous catheter connector and the infusion set connector respectively, and the outer sleeve is sleeved on the outer peripheral side of the measuring tube. When the valve is opened in response to the venous pressure test start program, the bending resistance assembly injects infusion liquid between the measuring tube and the outer sleeve to assist in bending the measuring tube.

[0033] The bending resistance assembly further includes:

[0034] Two fourth springs, the two fourth springs are symmetrically arranged on the outer peripheral side of the liquid sac, and both sides of the fourth springs are fixedly connected to the arc-shaped plate and the inner wall of the fixed box respectively. Beneficial effects

[0035] 1. Compared with the prior art, the central venous pressure monitoring device provided by the embodiment of the present invention manually operates the pressure sensor to drive the rectangular frame into the central venous pressure sensor connector. When the surface of the pressure sensor contacts the inner surface of the central venous pressure sensor connector, the first spring drives the sliding plate and the conical block to move towards the rectangular frame, so that the conical block enters the first through hole formed inside the rectangular frame, which is convenient for self-locking and fixing the rectangular frame, and further quickly installs and automatically self-locks the pressure sensor and the central venous pressure sensor connector, preventing the device from falling off due to external forces during use, thereby improving the installation portability and firmness of the product during actual use. After the device is used up, medical staff manually press two pressing plates at the same time, which drives the fixed block and the second conical block to move downward, so that the first conical block drives the connecting block, the sliding plate and the conical block to move away from the first through hole, and the central venous catheter connector and the central venous catheter can be disassembled. The self-locking state between the conical block and the rectangular frame can be released only by pressing the pressing plates at the same time, reducing the influence of external factors on the connection state between the central venous catheter connector and the central venous catheter.

[0036] 2. Compared with the prior art, for the device for real-time monitoring of central venous pressure provided by the embodiment of the present invention, during the process of the sliding plate driving the conical block to move towards the rectangular frame, the gas inside the second airbag will be transported to the inside of the first airbag, causing it to expand and drive the sliding block, connecting rod, and annular sealing layer to move. The annular sealing layer seals the connection between the pressure sensor and the central venous pressure sensor connector, preventing external air pressure from entering its interior from the connection, thereby preventing the real-time monitoring accuracy of the central venous pressure of the device from being affected.

[0037] 3. Compared with the prior art, for the device for real-time monitoring of central venous pressure provided by the embodiment of the present invention, there is no need to rely on third-party equipment or third-party staff for auxiliary operations. Therefore, the overall number of carrying equipment is streamlined, making it convenient to use while ensuring accurate detection. When it is necessary to open the valve body on the measuring tube, manually operate the turning handle to drive the valve stem and valve core to rotate. At this time, the valve stem will drive the double-headed convex block to rotate, and during the rotation of the double-headed convex block, the liquid inside the liquid bag will be transported to the inside of the outer sleeve and the measuring tube through the infusion tube, annular frame, and multiple water outlets to increase the internal pressure of the pipeline, thereby increasing the overall rigidity and stability of the pipeline, improving the bending resistance of the measuring tube, preventing the measuring tube from bending due to patient movement during the central venous pressure monitoring process, and further preventing the real-time monitoring accuracy of the device from being affected.

[0038] 4. Compared with the prior art, for the device for real-time monitoring of central venous pressure provided by the embodiment of the present invention, under the combined action of the fixing component, sealing component, and sealing component, it is convenient for medical staff to quickly replace and install the measuring tube, infusion tube, and pressure sensor, improving the portability of the device during use. Moreover, automatic self-locking between pipelines is achieved during the installation process, reducing the influence of external factors on the pipeline connection, assisting in improving the applicability of the device. At the same time, the sealing performance of the pipeline connection is effectively guaranteed during the installation process, preventing external factors from affecting the monitoring accuracy of the device, and assisting in improving the bending resistance of the measuring tube during real-time monitoring, further improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention.

[0040] Figure 1 It is a schematic three-dimensional structure diagram of a device for real-time monitoring of central venous pressure.

[0041] Figure 2 It is for a device for real-time monitoring of central venous pressure Figure 1 Partial enlarged structural schematic diagram of part A.

[0042] Figure 3 It is a schematic top - down internal structure diagram of the central venous pressure sensor connector in a device for real - time monitoring of central venous pressure.

[0043] Figure 4 It is for a device for real - time monitoring of central venous pressure Figure 3 Schematic diagram of the partial enlarged structure at position B.

[0044] Figure 5 It is a partial three - dimensional structure schematic diagram of the fixing component in a device for real - time monitoring of central venous pressure.

[0045] Figure 6 It is a schematic diagram of the internal structure of the valve body and the fixing box in a device for real - time monitoring of central venous pressure.

[0046] Figure 7 It is for a device for real - time monitoring of central venous pressure Figure 6 Schematic diagram of the partial enlarged structure at position C.

[0047] Figure 8 It is a three - dimensional structure schematic diagram of the double - headed convex block in a device for real - time monitoring of central venous pressure.

[0048] In the attached drawings: 1. Central venous catheter connector; 2. Central venous catheter; 3. Infusion tube; 4. Measuring tube; 5. Infuser connector; 6. Central venous pressure sensor connector; 7. Fixing component; 701. First cavity; 702. First spring; 703. Sliding plate; 704. Tapered block; 705. Rectangular frame; 706. First through - hole; 707. Connecting block; 708. First cone block; 709. Second cone block; 710. Fixed block; 711. Pressing plate; 712. Second spring; 8. Sealing component; 801. Second cavity; 802. Third spring; 803. Sliding block; 804. Connecting rod; 805. Annular sealing layer; 806. First airbag; 807. Air delivery tube; 808. Second airbag; 9. Bending - resistance component; 901. Fixing box; 902. Arc plate; 903. Liquid sac; 904. Fourth spring; 905. Infusion tube; 906. Annular frame; 907. Outer sleeve; 908. Double - headed convex block; 10. Pressure sensor; 11. Valve body; 12. Valve rod; 13. Rotating handle. Detailed implementation manners

[0049] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0050] An object of an embodiment of the present invention is to provide a device for real-time monitoring of central venous pressure, aiming to solve the problem of quickly disassembling and installing a measuring tube and an infusion tube while ensuring the connection tightness between the pipes.

[0051] The following describes the specific implementation of the present invention in detail with reference to specific embodiments. Embodiment 1

[0052] Figure 1 It is a schematic three-dimensional structure diagram of a device for real-time monitoring of central venous pressure.

[0053] Figure 6 It is a schematic internal structure diagram of a valve body and a fixed box in a device for real-time monitoring of central venous pressure.

[0054] Specifically, as Figure 1 shown, in an embodiment of the present invention, a device for real-time monitoring of central venous pressure includes a central venous catheter connector 1, and one end of the central venous catheter connector 1 is communicated with a central venous catheter 2;

[0055] An infusion tube 3, one end of the infusion tube 3 is communicated with the central venous catheter connector 1, and the infusion tube 3 is arranged on the side away from the central venous catheter 2;

[0056] Among them, the other end of the infusion tube 3 is communicated with an infusion set connector 5, a measuring tube 4 is arranged on one side of the infusion tube 3, the measuring tube 4 is a flexible tube, one end of the measuring tube 4 is communicated with the central venous catheter connector 1, the other end of the measuring tube 4 is communicated with a central venous pressure sensor connector 6, the other side of the central venous pressure sensor connector 6 is communicated with a pressure sensor 10, and the pressure sensor 10 is electrically connected to an external display and an alarm through a wire;

[0057] A fixing assembly 7, there are three fixing assemblies 7, and the three fixing assemblies 7 are respectively arranged inside the central venous catheter connector 1, the infusion set connector 5, and the central venous pressure sensor connector 6;

[0058] A bending resistance assembly 9, the bending resistance assembly 9 is arranged above the measuring tube 4.

[0059] Figure 3 It is a schematic internal top view structure diagram of a central venous pressure sensor connector in a device for real-time monitoring of central venous pressure.

[0060] Figure 4 It is a device for real-time monitoring of central venous pressure Figure 3 Partial enlarged structure diagram at position B.

[0061] Figure 5 It is a partial schematic three-dimensional structure diagram of a fixing assembly in a device for real-time monitoring of central venous pressure.

[0062] Please refer to Figure 1 and Figures 3 - 6 , in the embodiment of the present invention, the bottoms of the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6 are set to be arc-shaped, and the fixing assembly 7 includes:

[0063] The first cavity 701, there are two first cavities 701, and the two first cavities 701 are symmetrically arranged inside the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6 respectively;

[0064] The first spring 702, one side of the first spring 702 is fixedly connected to the inner wall of the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6, and the other side of the first spring 702 is fixedly connected to a sliding plate 703, and the sliding plate 703 is slidably connected inside the first cavity 701;

[0065] The conical block 704, one side of the conical block 704 is fixedly connected to the sliding plate 703, and the conical block 704 is arranged on the side away from the first spring 702;

[0066] The rectangular frame 705, one side of the rectangular frame 705 is fixedly connected to the pressure sensor 10 and the central venous catheter 2, and the rectangular frame 705 is slidably connected inside the first cavity 701. A first through hole 706 is formed inside the rectangular frame 705, and the first through hole 706 is engaged with the conical block 704.

[0067] The connecting block 707, the bottom of the connecting block 707 is fixedly connected to the top of the sliding plate 703.

[0068] The first cone block 708, the bottom of the first cone block 708 is fixedly connected to the top of the connecting block 707. A second cone block 709 is arranged on the top of the first cone block 708. A fixing block 710 is fixedly connected to the center of the top of the second cone block 709, and a pressing plate 711 is fixedly connected to the top of the fixing block 710;

[0069] The second spring 712, there are two second springs 712, and the two second springs 712 are symmetrically arranged on both sides of the fixing block 710. The two sides of the second spring 712 are respectively fixedly connected to the pressing plate 711 and the inner walls of the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6. Embodiment 2

[0070] Figure 1 It is a schematic three-dimensional structure diagram of a device for real-time monitoring of central venous pressure.

[0071] Figure 6 It is a schematic diagram of the internal structure of the valve body and the fixed box in a device for real-time monitoring of central venous pressure.

[0072] Specifically, as Figure 1 shown, in the embodiment of the present invention, a device for real-time monitoring of central venous pressure includes a central venous catheter connector 1, and one end of the central venous catheter connector 1 is connected to a central venous catheter 2;

[0073] An infusion tube 3, one end of the infusion tube 3 is connected to the central venous catheter connector 1, and the infusion tube 3 is arranged on the side away from the central venous catheter 2;

[0074] Among them, the other end of the infusion tube 3 is connected to an infusion set connector 5, a measuring tube 4 is arranged on one side of the infusion tube 3, the measuring tube 4 is a flexible tube, one end of the measuring tube 4 is connected to the central venous catheter connector 1, the other end of the measuring tube 4 is connected to a central venous pressure sensor connector 6, and the other side of the central venous pressure sensor connector 6 is connected to a pressure sensor 10. The pressure sensor 10 is electrically connected to an external display and an alarm through a wire;

[0075] A fixing assembly 7, there are three fixing assemblies 7, and the three fixing assemblies 7 are respectively arranged inside the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6;

[0076] A bending resistance assembly 9, the bending resistance assembly 9 is arranged above the measuring tube 4.

[0077] Figure 2 It is a schematic diagram of a partial enlarged structure at A in a device for real-time monitoring of central venous pressure Figure 1 It is a schematic diagram of the internal top view structure of the central venous pressure sensor connector in a device for real-time monitoring of central venous pressure.

[0078] Figure 3 It is a schematic diagram of a partial enlarged structure at B in a device for real-time monitoring of central venous pressure

[0079] Figure 4 It is a schematic diagram of a partial enlarged structure at B in a device for real-time monitoring of central venous pressure Figure 3 It is a schematic diagram of a partial enlarged structure at B in a device for real-time monitoring of central venous pressure.

[0080] Please refer to Figures 1 - 4 and Figure 6 , in the embodiment of the present invention, a sealing assembly 8 is arranged on one side of the fixing assembly 7, and a plurality of sealing assemblies 8 are respectively arranged inside the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6. The sealing assembly 8 includes:

[0081] A second cavity 801, the second cavity 801 is arranged inside the central venous catheter connector 1, the infusion set connector 5 and the central venous pressure sensor connector 6;

[0082] The third spring 802, one side of the third spring 802 is fixedly connected to the inner walls of the central venous catheter adapter 1, the infusion set adapter 5 and the central venous pressure sensor adapter 6, the other side of the third spring 802 is fixedly connected with a sliding block 803, and the sliding block 803 is slidably connected inside the second cavity 801;

[0083] The connecting rod 804, one end of the connecting rod 804 is fixedly connected to the sliding block 803, the other end of the connecting rod 804 is fixedly connected with an annular sealing layer 805, the annular sealing layer 805 is arranged on the inner peripheral side of the pressure sensor 10 and the central venous catheter 2, and both the annular sealing layer 805 and the connecting rod 804 are slidably sealed inside the second cavity 801;

[0084] The first airbag 806, the first airbag 806 is arranged inside the second cavity 801, and both sides of the first airbag 806 are fixedly connected to the inner walls of the sliding block 803, the central venous catheter adapter 1, the infusion set adapter 5 and the central venous pressure sensor adapter 6 respectively, and one side of the first airbag 806 is communicated with an air delivery pipe 807;

[0085] The second airbag 808, one side of the second airbag 808 is communicated with the air delivery pipe 807, the second airbag 808 is arranged inside the first cavity 701, and both sides of the second airbag 808 are fixedly connected to the inner walls of the sliding plate 703, the central venous catheter adapter 1, the infusion set adapter 5 and the central venous pressure sensor adapter 6 respectively. Embodiment 3

[0086] Figure 1 It is a schematic diagram of the three-dimensional structure in a device for real-time monitoring of central venous pressure.

[0087] Figure 6 It is a schematic diagram of the internal structure of the valve body and the fixed box in a device for real-time monitoring of central venous pressure.

[0088] Specifically, as Figure 1 shown, in the embodiment of the present invention, a device for real-time monitoring of central venous pressure includes a central venous catheter adapter 1, and one end of the central venous catheter adapter 1 is communicated with a central venous catheter 2;

[0089] The infusion tube 3, one end of the infusion tube 3 is communicated with the central venous catheter adapter 1, and the infusion tube 3 is arranged on the side far from the central venous catheter 2;

[0090] Wherein, the other end of the infusion tube 3 is connected to an infusion set adapter 5. A measuring tube 4 is arranged on one side of the infusion tube 3. The measuring tube 4 is a flexible tube. One end of the measuring tube 4 is connected to a central venous catheter adapter 1, and the other end of the measuring tube 4 is connected to a central venous pressure sensor adapter 6. The other side of the central venous pressure sensor adapter 6 is connected to a pressure sensor 10. The pressure sensor 10 is electrically connected to an external display and an alarm through a wire;

[0091] Fixing components 7. There are three fixing components 7, and the three fixing components 7 are respectively arranged inside the central venous catheter adapter 1, the infusion set adapter 5 and the central venous pressure sensor adapter 6;

[0092] Anti-bending component 9. The anti-bending component 9 is arranged above the measuring tube 4.

[0093] Figure 7 It is a partial enlarged structural schematic diagram of the C part in a device for real-time monitoring of central venous pressure Figure 6 in the device. Figure 8 It is a three-dimensional structural schematic diagram of a double-headed convex block in a device for real-time monitoring of central venous pressure.

[0094] Please refer to Figure 1 、 Figure 6 and Figure 8 . In an embodiment of the present invention, valve bodies 11 are arranged on both the infusion tube 3 and the measuring tube 4. A valve core is rotatably connected inside the valve body 11. A valve rod 12 is fixedly connected to the top of the valve core. The top end of the valve rod 12 extends to the outside of the valve body 11 and is fixedly connected to a turning handle 13.

[0095] As a further limitation of the technical solution of the embodiment of the present invention, there is one anti-bending component 9, and the anti-bending component 9 is located at the top of the valve body 11 on the measuring tube 4. The anti-bending component 9 includes:

[0096] Fixing box 901. The bottom of the fixing box 901 is fixedly connected to the top of the valve body 11, and the fixing box 901 is rotatably connected to the outer peripheral side of the valve rod 12 through a bearing;

[0097] Double-headed convex block 908. The double-headed convex block 908 is fixedly connected to the outer peripheral side of the valve rod 12, and the double-headed convex block 908 is arranged inside the fixing box 901;

[0098] Arc-shaped plates 902. There are two arc-shaped plates 902, and the two arc-shaped plates 902 are symmetrically arranged on the outer peripheral side of the double-headed convex block 908;

[0099] Liquid sac 903. One side of the liquid sac 903 is fixedly connected to the arc-shaped plate 902, and the other side of the liquid sac 903 is fixedly connected to the inner wall of the fixing box 901.

[0100] One side of the liquid sac 903 is connected to an infusion tube 905, and the other end of the infusion tube 905 is connected to an annular frame 906. The inner peripheral side of the annular frame 906 is fixedly connected to the outer wall of the measuring tube 4. An annular cavity is formed inside the annular frame 906, and the outer peripheral side of the annular cavity is communicated with a plurality of water outlets which are located inside the annular frame 906. An outer sleeve 907 is arranged on the outer peripheral side of the annular frame 906. Both ends of the outer sleeve 907 are fixedly connected to the outer walls of the valve body 11, the central venous catheter adapter 1 and the infusion set adapter 5 respectively, and the outer sleeve is sleeved on the outer peripheral side of the measuring tube. When the venous pressure test start program is activated, the bending resistance assembly injects infusion liquid between the measuring tube 4 and the outer sleeve 907 while opening the valve, so as to assist in bending resistance of the measuring tube 4.

[0101] The bending resistance assembly 9 further includes:

[0102] Two fourth springs 904, which are symmetrically arranged on the outer peripheral side of the liquid sac 903. Both sides of the fourth spring 904 are fixedly connected to the inner wall of the arc-shaped plate 902 and the fixed box 901 respectively.

[0103] In summary:

[0104] For the central venous pressure monitoring device provided by the embodiment of the present invention, manually operate the pressure sensor 10 to drive the rectangular frame 705 into the central venous pressure sensor adapter 6. At this time, the rectangular frame 705 will first squeeze the conical block 704, the sliding plate 703 and the first spring 702. When the surface of the pressure sensor 10 contacts the inner surface of the central venous pressure sensor adapter 6, the first spring 702 will drive the sliding plate 703 and the conical block 704 to move towards the rectangular frame 705, so that the conical block 704 enters the first through hole 706 formed inside the rectangular frame 705, which is convenient for self-locking fixation of the rectangular frame 705, and further for rapid installation and automatic self-locking of the pressure sensor 10 and the central venous pressure sensor adapter 6, preventing the device from falling off due to external forces during use, thereby improving the installation portability and firmness of the product during actual use. After use, medical staff manually press two pressing plates 711 at the same time, which drives the fixed block 710 and the second conical block 709 to move downward, so that the first conical block 708 drives the connecting block 707, the sliding plate 703 and the conical block 704 to move away from the first through hole 706, and then the conical block 704 releases the self-locking fixation effect on the rectangular frame 705, and the central venous catheter adapter 1 and the central venous catheter 2 can be disassembled. By pressing the pressing plates 711 at the same time, the self-locking state between the conical block 704 and the rectangular frame 705 can be released, reducing the influence of external factors on the connection state between the central venous catheter adapter 1 and the central venous catheter 2.

[0105] In the process of the sliding plate 703 driving the tapered block 704 to move towards the rectangular frame 705, the device for real-time monitoring of central venous pressure provided by the embodiment of the present invention will transport the gas inside the second airbag 808 into the first airbag 806, causing it to expand and drive the sliding block 803, the connecting rod 804, and the annular sealing layer 805 to move. The annular sealing layer 805 seals the connection between the pressure sensor 10 and the central venous pressure sensor connector 6 to prevent external air pressure from entering its interior from the connection, thereby preventing the real-time monitoring accuracy of the central venous pressure of the device from being affected.

[0106] When the valve body 11 on the measuring tube 4 needs to be opened, the device for real-time monitoring of central venous pressure provided by the embodiment of the present invention manually operates the turning handle 13 to drive the valve rod 12 and the valve core to rotate. At this time, the valve rod 12 will drive the double-headed convex block 908 to rotate. During the rotation of the double-headed convex block 908, it will squeeze the arc-shaped plate 902, the liquid sac 903, and the fourth spring 904, and transport the liquid inside the liquid sac 903 to the inside of the annular frame 906 through the infusion tube 905, and then through multiple water outlets to the inside of the outer sleeve 907 and the measuring tube 4 to increase the internal pressure of the pipeline, thereby increasing the overall rigidity and stability of the pipeline, improving the bending resistance of the measuring tube 4, preventing the measuring tube 4 from bending due to patient movement during the central venous pressure monitoring process, and preventing the real-time monitoring accuracy of the device from being affected.

[0107] Working principle:

[0108] S1. First, manually operate the pressure sensor 10 to drive the rectangular frame 705 into the central venous pressure sensor connector 6. At this time, the rectangular frame 705 will first squeeze the tapered block 704, the sliding plate 703, and the first spring 702. When the surface of the pressure sensor 10 contacts the inner surface of the central venous pressure sensor connector 6, the first spring 702 will drive the sliding plate 703 and the tapered block 704 to move towards the rectangular frame 705, so that the tapered block 704 enters the first through hole 706 opened inside the rectangular frame 705, thereby quickly installing and self-locking the pressure sensor 10 and the central venous pressure sensor connector 6;

[0109] S2. During the process of the sliding plate 703 driving the tapered block 704 to move towards the rectangular frame 705, it will squeeze the second airbag 808, and transport the gas inside the second airbag 808 to the inside of the first airbag 806 through the air delivery pipe 807, causing it to expand and drive the sliding block 803, the connecting rod 804, and the annular sealing layer 805 to move. The annular sealing layer 805 seals the connection between the pressure sensor 10 and the central venous pressure sensor connector 6;

[0110] S3. Then connect the fixed and sealed infusion tube 3, measurement tube 4, pressure sensor 10 and central venous catheter adapter 1 to the central venous catheter 2 implanted in the patient. By the same principle as above, the central venous catheter 2 and the central venous catheter adapter 1 can be quickly installed and self-locked.

[0111] S4. After connecting the infusion tube 3 to the central venous catheter adapter 1 and the central venous catheter 2, the other end of the infusion tube 3 is connected to an external infusion device through an infusion device adapter 5. At this time, the valve body 11 on the infusion tube 3 is in the open state, and the valve body 11 on the measurement tube 4 is in the closed state.

[0112] S5. When it is necessary to monitor the central venous pressure of the patient, make the valve body 11 on the measurement tube 4 in the open state. At this time, the valve body 11 on the infusion tube 3 is in the closed state, and the normal saline in the external infusion device will fill the measurement tube 4. Then close the external infusion device so that the pressure sensor 10 can monitor and evaluate the central venous pressure of the patient in real time.

[0113] S6. When it is necessary to open the valve body 11 on the measurement tube 4, manually operate the rotating handle 13 to drive the valve stem 12 and the valve core to rotate. At this time, the valve stem 12 will drive the double-headed convex block 908 to rotate, and the double-headed convex block 908 will squeeze the arc-shaped plate 902, the liquid sac 903 and the fourth spring 904 during rotation, and convey the liquid inside the liquid sac 903 to the inside of the annular frame 906 through the infusion tube 905, and then convey it to the inside of the outer sleeve 907 and the measurement tube 4 through multiple water outlets to increase the bending resistance of the measurement tube 4 during use.

[0114] S7. After use, the medical staff manually press the two pressing plates 711 at the same time to drive the fixed block 710 and the second cone block 709 to move downward. During the downward movement of the second cone block 709, the first cone block 708 will drive the connecting block 707 and the sliding plate 703 to squeeze the first spring 702 through its inclined surface, so that the sliding plate 703 drives the conical block 704 to move away from the first through hole 706, and then the conical block 704 releases the self-locking fixation effect on the rectangular frame 705, and the central venous catheter adapter 1 and the central venous catheter 2 can be disassembled and replaced.

[0115] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device capable of real-time monitoring of central venous pressure, characterized in that: The central venous pressure device comprises: A central venous catheter connector, one end of which is connected to a central venous catheter; An infusion tube, one end of which is connected to the central venous catheter connector, and the infusion tube is arranged on a side away from the central venous catheter; The other end of the infusion tube is connected to an infusion device connector, a measuring tube is arranged on one side of the infusion tube, the measuring tube is arranged as a hose, one end of the measuring tube is connected to a central venous catheter connector, the other end of the measuring tube is connected to a central venous pressure sensor connector, the other side of the central venous pressure sensor connector is connected to a pressure sensor, and the pressure sensor is electrically connected to an external display and an alarm through a wire; A fixing component, wherein three fixing components are provided, and the three fixing components are respectively arranged inside the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector; The anti-bending component is arranged above the measuring tube, and the anti-bending component comprises: a fixed box, the bottom of which is fixedly connected to the top of the valve body, and the fixed box is rotatably connected to the outer peripheral side of the valve stem through a bearing; A double-headed protrusion, the double-headed protrusion is fixedly connected to the outer peripheral side of the valve stem, and the double-headed protrusion is arranged inside the fixed box; an arc plate, two arc plates are provided, and the two arc plates are symmetrically arranged on the outer peripheral side of the double-headed protrusion; a liquid sac, one side of the liquid sac is fixedly connected to the arc plate, and the other side of the liquid sac is fixedly connected to the inner wall of the fixed box, one side of the liquid sac is connected to an infusion tube, and the other end of the infusion tube is connected to an annular frame, the inner peripheral side of the annular frame is fixedly connected to the outer wall of the measuring tube, an annular cavity is opened inside the annular frame, and a plurality of water outlets are connected to the outer peripheral side of the annular cavity, and the water outlets are located inside the annular frame, and an outer sleeve is provided on the outer peripheral side of the annular frame, the anti-bending component responds to the venous pressure test start-up program to open the valve and injects infusion liquid between the measuring tube and the outer sleeve to assist in anti-bending of the measuring tube.

2. A device capable of real-time monitoring of central venous pressure according to claim 1, characterized in that: The bottoms of the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector are arranged in an arc shape, and the fixing assembly comprises: A first cavity, wherein two first cavities are provided, and the two first cavities are symmetrically arranged inside the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector respectively; A first spring, one side of which is fixedly connected to the inner wall of the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector, and the other side of which is fixedly connected to a sliding plate, which is slidably connected to the inside of the first cavity; A conical block, one side of which is fixedly connected to the sliding plate, and the conical block is arranged on a side away from the first spring; A rectangular frame, one side of which is fixedly connected to the pressure sensor and the central venous catheter, and the rectangular frame is slidably connected to the inside of the first cavity, a first through hole is opened inside the rectangular frame, and the first through hole is clamped with the tapered block.

3. A device capable of real-time monitoring of central venous pressure according to claim 2, characterized in that: The fixing assembly also includes: A connecting block, the bottom of which is fixedly connected to the top of the sliding plate; A first cone block, wherein the bottom of the first cone block is fixedly connected to the top of the connecting block, a second cone block is arranged on the top of the first cone block, a fixing block is fixedly connected at the center of the top of the second cone block, and a pressing plate is fixedly connected to the top of the fixing block; The second spring is provided with two second springs, which are symmetrically arranged on both sides of the fixed block, and the two sides of the second spring are respectively fixedly connected to the inner wall of the pressing plate, the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector.

4. The device capable of real-time monitoring of central venous pressure according to claim 3, characterized in that: A sealing component is provided on one side of the fixing component, and a plurality of sealing components are respectively arranged inside the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector, and the sealing component includes: a second cavity, the second cavity being disposed inside the central venous catheter connector, the infusion set connector, and the central venous pressure sensor connector; A third spring, one side of the third spring is fixedly connected to the inner wall of the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector, and the other side of the third spring is fixedly connected to a sliding block, and the sliding block is slidably connected inside the second cavity; A connecting rod, one end of which is fixedly connected to the sliding block, and the other end of which is fixedly connected to an annular sealing layer, which is arranged on the inner circumference of the pressure sensor and the central venous catheter, and the annular sealing layer and the connecting rod are both slidably sealed inside the second cavity.

5. The device capable of real-time monitoring of central venous pressure according to claim 4, characterized in that: The sealing assembly further comprises: A first airbag, the first airbag is arranged inside the second cavity, and two sides of the first airbag are respectively fixedly connected to the inner wall of the sliding block, the central venous catheter connector, the infusion device connector and the central venous pressure sensor connector, and one side of the first airbag is connected to the air delivery tube; The second airbag, one side of the second airbag is connected to the air supply pipe, the second airbag is arranged inside the first cavity, and the two sides of the second airbag are respectively fixedly connected to the sliding plate, the central venous catheter connector, the infusion device connector and the inner wall of the central venous pressure sensor connector.

6. The device capable of real-time monitoring of central venous pressure according to claim 5, characterized in that: The infusion tube and the measuring tube are both provided with a valve body, a valve core is rotatably connected inside the valve body, a valve stem is fixedly connected to the top of the valve core, and the top of the valve stem extends to the outside of the valve body and is fixedly connected to a rotating handle.

7. The device capable of real-time monitoring of central venous pressure according to claim 6, characterized in that: The anti-bending component is provided with one, and the anti-bending component is located on the top of the valve body on the measuring tube.

8. The device capable of real-time monitoring of central venous pressure according to claim 7, characterized in that: The two ends of the outer sleeve are respectively fixedly connected to the valve body, the central venous catheter connector and the outer wall of the infusion device connector, and the outer sleeve is sleeved on the outer peripheral side of the measuring tube.

9. The device capable of real-time monitoring of central venous pressure according to claim 8, characterized in that: The anti-bending component also includes: The fourth spring is provided with two fourth springs, and the two fourth springs are symmetrically arranged on the outer peripheral side of the liquid bag, and the two sides of the fourth spring are respectively fixedly connected to the arc plate and the inner wall of the fixed box.

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