Clamp type convenient and controllable ECMO flow sensor

Abstract

The invention discloses a clamp type convenient and adjustable ECMO flow sensor, and relates to the technical field of medical auxiliary instruments, the clamp type convenient and adjustable ECMO flow sensor comprises an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are symmetrically arranged up and down, infusion tube grooves are formed in the inner sides of the upper clamping plate and the lower clamping plate, a laser probe is arranged in the middle of each infusion tube groove, and a battery and a central processing unit are arranged in the upper clamping plate; a touch screen and a switch button are arranged on the surface of the upper clamping plate, and the touch screen is used for displaying the flow speed. According to the ECMO flow sensor, the independent clamping plate is arranged, the effect of independently adjusting the flow speed can be achieved, the ECMO flow sensor can be separated from a host to be independently used, the problems that a traditional ECMO flow sensor is inconvenient to carry, and one machine is provided with a fixed flow sensor are solved, laser flow speed measurement can be achieved by arranging the laser probe, the central processing unit and the servo motor; and the servo motor is used for controlling the distance between the upper clamping plate and the lower clamping plate in real time, so that the deformation of the infusion tube is controlled to realize flow control, and the function of automatic flow control is completely realized.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary devices, and more specifically, to a clamp-type convenient and adjustable ECMO flow sensor. Background Art

[0002] Extracorporeal membrane oxygenation (ECMO) is an advanced life support technology for patients with cardiopulmonary failure, which temporarily replaces the cardiopulmonary function by performing gas exchange outside the body. It is widely used in critically ill patients such as acute respiratory distress syndrome and fulminant myocarditis.

[0003] The flow sensors in traditional ECMO systems are usually fixedly configured, lacking portability and flexible adjustment capabilities. This design limits the application of ECMO in different scenarios, especially in situations where the device needs to be frequently moved. For example, the flow sensor is not convenient to carry and adjust, resulting in the inability to respond quickly in emergency situations. In addition, the complexity of the device also increases the operation difficulty of medical staff, and there is a lack of a function for conveniently regulating the flow rate.

[0004] Therefore, it is necessary to propose a clamp-type convenient and adjustable ECMO flow sensor to solve the above problems. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the present invention is to provide a clamp-type convenient and adjustable ECMO flow sensor to solve the problems that the flow sensors in existing ECMO systems are usually fixedly configured, lacking portability and flexible adjustment capabilities, and also lacking a function for conveniently regulating the flow rate.

[0007] (2) Technical Solutions

[0008] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0009] A clamp-type convenient and adjustable ECMO flow sensor includes an upper clamping plate and a lower clamping plate. The upper clamping plate and the lower clamping plate are arranged symmetrically up and down, and infusion tube grooves are provided on the inner sides. A laser probe is provided in the middle of the infusion tube grooves. A battery and a central processor are arranged inside the upper clamping plate. A touch screen and a switch button are provided on the surface of the upper clamping plate. The touch screen is used to display the flow rate and support adjusting the data of the servo motor, thereby changing the opening and closing distance between the upper clamping plate and the lower clamping plate, and further changing the flow rate;

[0010] A first installation groove and a second installation groove are provided in the middle of the upper clamping plate. A transmission component is provided between the upper clamping plate and the lower clamping plate;

[0011] A manual knob is provided inside the second installation groove.

[0012] Further, the laser probe is a laser Doppler velocimeter.

[0013] Further, the transmission assembly includes a servo motor and a threaded rod. The servo motor is fixedly connected in the first installation groove. A first output gear is fixedly connected to the output shaft of the servo motor. A speed-changing gear is fixedly connected to the top end of the threaded rod. The speed-changing gear is meshed with the first output gear. A threaded hole is formed in the middle of the top end of the lower clamping plate. The threaded rod is meshed with the threaded hole.

[0014] Further, guide chutes are formed on both sides of the top end of the lower clamping plate. Guide posts are slidably connected in the guide chutes. The top ends of the guide posts are fixedly connected to the upper clamping plate.

[0015] Further, a second output gear is arranged below the manual knob. A fixed shaft is fixedly connected to the middle of the second output gear. The bottom end of the fixed shaft is rotatably connected to the second installation groove. A clamping groove is fixedly connected to the top end of the fixed shaft. A transmission shaft is fixedly connected to the middle of the manual knob. A clamping protrusion is fixedly connected to the bottom end of the transmission shaft.

[0016] Further, the circumferences of the clamping protrusion and the inner wall of the clamping groove are both in a "rice" shape. The clamping protrusion and the clamping groove are adapted to each other. The top end of the transmission shaft is rotatably connected to a pressing cap. The pressing cap is rotatably connected to the transmission shaft through a bearing. A limiting ring is fixedly connected to the bottom end of the pressing cap. A tension spring is sleeved outside the pressing cap. The top end of the tension spring is fixedly connected to the second installation groove. The bottom end of the tension spring is fixedly connected to the limiting ring. The top end of the pressing cap extends out of the second installation groove.

[0017] Further, a lining plate is arranged on the surface of the infusion tube groove. Plugs are fixedly connected to both sides of the top end of the lining plate. A clamping groove is formed inside the plug.

[0018] Further, third installation grooves are formed inside both the upper clamping plate and the lower clamping plate. A recess is formed outside the third installation groove. A control column is arranged inside the recess. A connecting plate is fixedly connected to the end of the control column. A clamping block is fixedly connected to the inner side of the connecting plate. The plug corresponds to the third installation groove. The clamping block is adapted to the clamping groove. A compression spring is fixedly connected to the outer side of the connecting plate.

[0019] Further, a through hole is formed in the middle of the lining plate. The through hole corresponds to the laser probe. The through hole is formed to prevent the lining plate from blocking the laser probe.

[0020] (III) Beneficial effects

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. By providing an independent splint, the present invention can achieve the function of individually adjusting the flow rate and can be used independently of the main unit, solving the problem that traditional ECMO flow sensors are inconvenient to carry. With one machine equipped with a fixed flow sensor, it is difficult to meet the flexible and variable requirements such as the flow monitoring required in the ECMO hybrid mode.

[0023] 2. By providing a laser probe, a central processor and a servo motor, and with the cooperation of gears, threaded rods and threaded holes, the present invention can measure the flow rate by laser and use the servo motor to control the distance between the upper splint and the lower splint in real time, thereby controlling the deformation of the infusion tube to achieve flow control, fully realizing the function of automatic flow control. The lower limit and upper limit of the flow rate can also be input into the processor through the touch screen, and the flow rate can be controlled by the processor.

[0024] 3. By providing liners with different thicknesses, the present invention can flexibly replace the corresponding liners according to the diameter of the infusion tube, so as to realize the multi-scenario use of the device, greatly improving the scope of application of the device. The disassembly operation of taking out the liner by pressing the control column and the installation operation of pressing the liner to snap the plug into the third installation slot achieve the purpose of quick disassembly and assembly, greatly reducing the operation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the first three-dimensional schematic diagram of the ECMO flow sensor of the present invention;

[0026] Figure 2 is the second three-dimensional schematic diagram of the ECMO flow sensor of the present invention;

[0027] Figure 3 is the side view schematic diagram of the ECMO flow sensor of the present invention;

[0028] Figure 4 is the front view sectional schematic diagram of the ECMO flow sensor of the present invention;

[0029] Figure 5 is the sectional schematic diagram of the manual knob, the second output gear and the pressing cap of the present invention;

[0030] Figure 6 is the side view sectional schematic diagram of the ECMO flow sensor of the present invention;

[0031] Figure 7 of the present invention Figure 6 is the enlarged schematic diagram of the structure at A in;

[0032] Figure 8 is the three-dimensional schematic diagram of the liner structure of the present invention.

[0033] Reference numerals: 1, upper clamping plate; 2, lower clamping plate; 3, infusion tube groove; 4, laser probe; 5, touch screen; 6, switch button; 7, transmission assembly; 8, threaded rod; 9, threaded hole; 10, speed change gear; 11, first output gear; 12, servo motor; 13, guide chute; 14, guide post; 15, manual knob; 16, second output gear; 17, fixed shaft; 18, clamping groove; 19, transmission shaft; 20, clamping projection; 21, pressing cap; 22, limiting ring; 23, tension spring; 24, first mounting groove; 25, second mounting groove; 26, lining plate; 27, plug; 28, card slot; 29, through hole; 30, third mounting groove; 31, depression; 32, control column; 33, connecting plate; 34, clamping block; 35, compression spring; 36, bearing. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figures 1-8 , a clamp-type convenient and adjustable ECMO flow sensor, including an upper clamping plate 1 and a lower clamping plate 2. The upper clamping plate 1 and the lower clamping plate 2 are arranged symmetrically up and down, and infusion tube grooves 3 are provided on the inner sides. A laser probe 4 is provided in the middle of the infusion tube groove 3. A battery and a central processor are arranged inside the upper clamping plate 1. The laser probe 4 is a laser Doppler velocimeter. The laser Doppler velocimeter measures the fluid velocity using the laser Doppler effect and then calculates the flow rate. The LDV has the advantages of high precision, high spatial resolution, and high time resolution. A touch screen 5 and a switch button 6 are provided on the surface of the upper clamping plate 1. The touch screen 5 is used to display the flow rate and support adjusting the data of the servo motor 12, thereby changing the opening and closing distance between the upper clamping plate 1 and the lower clamping plate 2, and further changing the flow rate;

[0037] A first mounting groove 24 and a second mounting groove 25 are formed in the middle of the upper clamping plate 1. A transmission assembly 7 is provided between the upper clamping plate 1 and the lower clamping plate 2. The transmission assembly 7 includes a servo motor 12 and a threaded rod 8. The servo motor 12 is fixedly connected in the first mounting groove 24. A first output gear 11 is fixedly connected to the output shaft of the servo motor 12. A speed change gear 10 is fixedly connected to the top end of the threaded rod 8. The speed change gear 10 is meshed and connected with the first output gear 11. A threaded hole 9 is formed in the middle of the top end of the lower clamping plate 2. The threaded rod 8 is meshed and connected with the threaded hole 9. Guide chutes 13 are formed on both sides of the top end of the lower clamping plate 2. Guide posts 14 are slidably connected in the guide chutes 13. The top ends of the guide posts 14 are fixedly connected to the upper clamping plate 1;

[0038] In this embodiment, by setting the laser probe 4, the central processor and the servo motor 12, and with the cooperation of the gears, the threaded rod 8 and the threaded hole 9, the laser flow velocity can be measured, and the distance between the upper clamping plate 1 and the lower clamping plate 2 can be controlled in real time by using the servo motor 12, so as to control the deformation of the infusion tube and realize flow control. The function of automatic flow control is completely realized. The lower limit and upper limit of the flow velocity can also be input into the processor through the touch screen 5, and the flow velocity is controlled by the processor, which depends on the program of the processor. By setting independent clamping plates, the function of adjusting the flow velocity separately can be realized, and it can be used independently without the host, solving the problem that the traditional ECMO flow sensor is inconvenient to carry, and one machine is equipped with a fixed flow sensor, which is difficult to meet the flexible and changeable requirements such as the flow monitoring required by the ECMO hybrid mode.

[0039] Embodiment 2

[0040] Please refer to Figure 2 、 4 and 5. This embodiment is further optimized on the basis of Embodiment 1. Specifically, a manual knob 15 is provided inside the second mounting groove 25. A second output gear 16 is provided below the manual knob 15. A fixed shaft 17 is fixedly connected to the middle of the second output gear 16. The bottom end of the fixed shaft 17 is rotatably connected to the second mounting groove 25. A clamping groove 18 is fixedly connected to the top end of the fixed shaft 17. A transmission shaft 19 is fixedly connected to the middle of the manual knob 15. A clamping protrusion 20 is fixedly connected to the bottom end of the transmission shaft 19. The circumferences of the clamping protrusion 20 and the inner wall of the clamping groove 18 are both "cross" shaped. The clamping protrusion 20 and the clamping groove 18 are adapted to each other. The top end of the transmission shaft 19 is rotatably connected to a pressing cap 21. The pressing cap 21 is rotatably connected to the transmission shaft 19 through a bearing 36. A limiting ring 22 is fixedly connected to the bottom end of the pressing cap 21. A tension spring 23 is sleeved outside the pressing cap 21. The top end of the tension spring 23 is fixedly connected to the second mounting groove 25. The bottom end of the tension spring 23 is fixedly connected to the limiting ring 22. The top end of the pressing cap 21 extends out of the second mounting groove 25.

[0041] In this embodiment, by setting the manual knob 15 and through the combined action of the second output gear 16, fixed shaft 17, clamping groove 18, transmission shaft 19, clamping protrusion 20, pressing cap 21, limiting ring 22 and tension spring 23, a manual adjustment method can be realized, making the device more flexible. Under normal conditions, the tension spring 23 tightens the pressing cap 21 by its contractility, separating the transmission shaft 19 from the fixed shaft 17, so that the manual knob 15 can control the threaded rod 8 only when the pressing cap 21 is pressed, avoiding accidental touch and improving the practicality of the device.

[0042] Embodiment 3

[0043] Please refer to Figures 6-8 , this embodiment makes the following optimizations on the basis of Example 1 or Example 2. Specifically, a lining plate 26 is provided on the surface of the infusion tube groove 3. Plug heads 27 are fixedly connected to both sides of the top end of the lining plate 26. A clamping groove 28 is provided inside the plug head 27. A through hole 29 is provided in the middle of the lining plate 26, and the through hole 29 corresponds to the laser probe 4. The through hole 29 is provided to prevent the lining plate 26 from blocking the laser probe 4. Third installation grooves 30 are provided inside both the upper clamping plate 1 and the lower clamping plate 2. A recess 31 is provided outside the third installation groove 30. A control column 32 is provided inside the recess 31. A connecting plate 33 is fixedly connected to the end of the control column 32. A clamping block 34 is fixedly connected to the inside of the connecting plate 33. The plug head 27 corresponds to the third installation groove 30, and the clamping block 34 is adapted to the clamping groove 28. A compression spring 35 is fixedly connected to the outside of the connecting plate 33.

[0044] In this embodiment, by setting lining plates 26 with different thicknesses, the corresponding lining plates 26 can be flexibly replaced according to the diameter of the infusion tube, so as to realize the multi-scenario use of the device, greatly improving the application range of the device. The disassembly operation of removing the lining plate 26 can be achieved by pressing the control column 32, and the installation operation of clamping the plug head 27 into the third installation groove 30 can be achieved by pressing the lining plate 26, realizing the purpose of quick disassembly and quick installation, and greatly reducing the operation difficulty.

[0045] Working principle: Fix the infusion tube: Put the infusion tube into the infusion tube groove 3 from the open side of the upper clamping plate 1 and the lower clamping plate 2;

[0046] Adjust the positions of the upper clamping plate 1 and the lower clamping plate 2: Hold the clamping plates with your hand, press the pressing cap 21 with your index finger. The pressing cap 21 drives the transmission shaft 19 to move downward. The clamping protrusion 20 at the bottom of the transmission shaft 19 is inserted into the clamping groove 18 at the top of the fixed shaft 17. Then, use your thumb to turn the manual knob 15. The manual knob 15 drives the transmission shaft 19 to rotate. The transmission shaft 19 drives the second output gear 16 to rotate through the clamping protrusion 20 and the clamping groove 18. The second output gear 16 drives the threaded rod 8 to rotate through the transmission gear 10. Under the action of the threaded hole 9, the threaded rod 8 drives the upper clamping plate 1 to move, thereby changing the distance between the upper clamping plate 1 and the lower clamping plate 2. By setting the manual knob 15, a manual adjustment method can be realized, and the device has higher flexibility. The tension spring 23 uses its contractility to tighten the pressing cap 21 under normal conditions, so that the transmission shaft 19 is separated from the fixed shaft 17, so that the manual knob 15 can only control the threaded rod 8 when the pressing cap 21 is pressed, avoiding accidental touch and improving the practicality of the device;

[0047] Flow control: The laser probe 4 monitors the blood flow rate inside the infusion tube and transmits the data to the central processor. The central processor controls the servo motor 12 according to the preset flow rate parameters. The servo motor 12 drives the transmission gear 10 to rotate through the first output gear 11. The transmission gear 10 drives the threaded rod 8 to rotate. Under the action of the threaded hole 9, the threaded rod 8 drives the upper clamping plate 1 to move, thereby changing the gap between the upper clamping plate 1 and the lower clamping plate 2, and then the deformation size of the infusion tube can be adjusted to achieve flow control. By setting the laser probe 4, the central processor and the servo motor 12, and with the cooperation of the gears, the threaded rod 8 and the threaded hole 9, the laser can be used to measure the flow rate, and the distance between the upper clamping plate 1 and the lower clamping plate 2 can be controlled in real time by the servo motor 12, and then the deformation size of the infusion tube can be controlled to achieve flow control, fully realizing the function of automatic flow control. The lower limit and upper limit of the flow rate can also be input into the processor through the touch screen 5, and the flow rate can be controlled by the processor;

[0048] Replacing the lining plate 26: If the infusion tube groove 3 cannot accommodate the diameter of the infusion tube, replace the lining plate 26 with a suitable model and thickness. Pinch the control columns 32 on both sides with the thumb and index finger / middle finger and apply inward force. The control columns 32 drive the clamping blocks 34 to move through the connecting plate 33. The clamping blocks 34 leave the card slots 28 on the plug 27. At this time, the plug 27 loses its restraint and falls off from the third installation groove 30, and then the lining plate 26 can be removed. When installing a lining plate 26 of other models, just align the plug 27 of the lining plate 26 with the third installation groove 30 and apply force. The plug 27 first pushes away the clamping blocks 34, and then the clamping blocks 34 enter the card slots 28 on the plug 27 under the tension of the compression spring 35 to complete the fixation. By setting lining plates 26 with different thicknesses, the corresponding lining plates 26 can be flexibly replaced according to the diameter of the infusion tube, so as to realize the multi-scenario use of the device, greatly improving the applicable range of the device. The disassembly operation of pressing the control column 32 to remove the lining plate 26 and the installation operation of pressing the lining plate 26 to snap the plug 27 into the third installation groove 30 achieve the purpose of quick disassembly and quick installation, greatly reducing the operation difficulty.

[0049] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. A clamp-type convenient and adjustable ECMO flow sensor, comprising an upper clamp (1) and a lower clamp (2), characterized in that: The upper splint (1) and the lower splint (2) are arranged symmetrically up and down, and infusion tube grooves (3) are provided on the inner sides. A laser probe (4) is provided in the middle of the infusion tube groove (3). A battery and a central processor are arranged inside the upper splint (1). A touch screen (5) and a switch button (6) are provided on the surface of the upper splint (1). The touch screen (5) is used to display the flow rate; A first installation groove (24) and a second installation groove (25) are provided in the middle of the upper splint (1). A transmission component (7) is provided between the upper splint (1) and the lower splint (2). A manual knob (15) is provided inside the second installation groove (25).

2. A clamp-type convenient and adjustable ECMO flow sensor according to claim 1, characterized in that: The laser probe (4) is a laser Doppler velocimeter.

3. A clamp-type convenient and adjustable ECMO flow sensor according to claim 1, characterized in that: The transmission component (7) includes a servo motor (12) and a threaded rod (8). The servo motor (12) is fixedly connected in the first installation groove (24). A first output gear (11) is fixedly connected to the output shaft of the servo motor (12). A variable speed gear (10) is fixedly connected to the top of the threaded rod (8). The variable speed gear (10) is meshed and connected with the first output gear (11). A threaded hole (9) is provided in the middle of the top of the lower splint (2). The threaded rod (8) is meshed and connected with the threaded hole (9).

4. According to claim 1, a clamp-type convenient and adjustable ECMO flow sensor is characterized in that: Guide sliding grooves (13) are provided on both sides of the top of the lower splint (2). Guide posts (14) are slidably connected in the guide sliding grooves (13). The top of the guide posts (14) is fixedly connected to the upper splint (1).

5. According to claim 1, a clamp-type convenient and adjustable ECMO flow sensor is characterized in that: A second output gear (16) is provided below the manual knob (15). A fixed shaft (17) is fixedly connected to the middle of the second output gear (16). The bottom end of the fixed shaft (17) is rotatably connected to the second installation groove (25). A clamping groove (18) is fixedly connected to the top of the fixed shaft (17). A transmission shaft (19) is fixedly connected to the middle of the manual knob (15). A clamping protrusion (20) is fixedly connected to the bottom end of the transmission shaft (19).

6. A clamp-type convenient and adjustable ECMO flow sensor according to claim 5, characterized in that: The circumferences of the clamping protrusion (20) and the inner wall of the clamping groove (18) are both in a "rice" shape. The clamping protrusion (20) and the clamping groove (18) are adapted to each other. The top of the transmission shaft (19) is rotatably connected to a pressing cap (21). The pressing cap (21) is rotatably connected to the transmission shaft (19) through a bearing (36). A limiting ring (22) is fixedly connected to the bottom end of the pressing cap (21). A tension spring (23) is sleeved outside the pressing cap (21). The top of the tension spring (23) is fixedly connected to the second installation groove (25). The bottom end of the tension spring (23) is fixedly connected to the limiting ring (22). The top of the pressing cap (21) extends out of the second installation groove (25).

7. A clamp-type convenient and adjustable ECMO flow sensor according to claim 1, characterized in that: A lining plate (26) is provided on the surface of the infusion tube groove (3). Plug heads (27) are fixedly connected to both sides of the top of the lining plate (26). A clamping groove (28) is provided inside the plug head (27).

8. A clamp-type convenient and adjustable ECMO flow sensor according to claim 7, characterized in that: The upper clamping plate (1) and the lower clamping plate (2) are both provided with a third mounting groove (30), the outer side of the third mounting groove (30) is provided with a recess (31), the interior of the recess (31) is provided with a control column (32), the end of the control column (32) is fixedly connected with a connecting plate (33), the inner side of the connecting plate (33) is fixedly connected with a card block (34), the plug (27) corresponds to the third mounting groove (30), the card block (34) is adapted to the card groove (28), and the outer side of the connecting plate (33) is fixedly connected with a compression spring (35).

9. A clamp-type convenient and adjustable ECMO flow sensor according to claim 8, characterized in that: A through hole (29) is provided in the middle of the lining plate (26), and the through hole (29) corresponds to the laser probe (4). The through hole (29) is provided to prevent the lining plate (26) from blocking the laser probe (4).

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