Suction device applied to coronary artery bypass surgery

Abstract

The invention belongs to the technical field of cardiac surgery instruments, and particularly relates to a suction device applied to coronary artery bypass surgery, which comprises a nursing trolley, a first placing plate is fixedly mounted at the lower end of the nursing trolley, a second placing plate is fixedly mounted at the upper end of the nursing trolley, and the first placing plate and the second placing plate are arranged in parallel up and down; four groups of universal wheels are fixedly mounted at the lower end of the nursing trolley, protective side plates are fixedly mounted on the front side, the rear side, the left side and the right side of a first placement plate at the lower end of the nursing trolley, and a negative pressure pump is fixedly mounted on the upper side of the right end of the first placement plate; through mutual cooperation of a negative pressure pump, a main pipeline, a blood storage tank, a tank cover and a branch pipe, a bent pipe suction head, a straight pipe suction head and a thin pipe suction head in a storage box are connected with a connector for replacement, then blood at a wound surface is sucked in the operation process, and the blood is absorbed and stored through the blood storage tank; and an undefined operation field caused by blood flow is avoided.

Description

Technical Field

[0001] This invention belongs to the field of cardiac surgical instruments technology, specifically a suction device for coronary artery bypass surgery. Background Technology

[0002] Off-pump coronary artery bypass grafting (OPCABG) is an important treatment for severe coronary artery disease. A cardiac fixator reduces the range of motion of the myocardium around the anastomosis site, simplifying the anastomosis process; it is an essential surgical consumable in OPCABG. In conventional off-pump coronary artery bypass grafting, the cardiac fixator is attached to a sternal retractor. The surgeon makes an incision along the midline of the patient's chest to expose the thoracic cavity, reveal the heart, and perform the cardiac surgery.

[0003] A Chinese invention patent, CN116159195A, discloses a suction device for coronary artery bypass graft (CABG) surgery. The key technical features include: a fixed base positioned on a CABG fixator or sternal retractor; a suction tube connected to a negative pressure suction device and fixedly mounted on the fixed base; a first universal guide tube connected to the suction tube and capable of adjustment and positioning in any direction; and a press-type suction head with a hollow interior connected to the suction tube via the first universal guide tube, and several first suction holes on its side communicating with the interior of the press-type suction head. The press-type suction head is adapted to press against the coronary artery bypass graft anastomosis site to absorb blood, thereby exposing the anastomosis area. This invention can automatically aspirate blood from the coronary artery bypass graft anastomosis site during surgery, exposing the anastomosis area, while simultaneously assisting the fixator in securing the anastomosis area, reducing the difficulty of surgical anastomosis and saving human resources.

[0004] However, the above-mentioned technologies often have the following drawbacks: they are used to aspirate blood generated during surgery, but there is no mechanism to process the aspirated blood, resulting in the waste of the aspirated blood. In addition, the blood dries out after a certain period of time and cannot be recycled, which not only wastes valuable blood resources, but also increases the cost of surgery and the economic burden on patients. At the same time, the dried blood may also pollute the surgical environment and affect the hygiene of the operating room.

[0005] Therefore, the present invention provides a suction device for use in coronary artery bypass surgery. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A suction device for coronary artery bypass surgery, comprising a nursing cart, a first placement plate fixedly installed at the lower end of the nursing cart, and a second placement plate fixedly installed at the upper end of the nursing cart. The first and second placement plates are arranged parallel to each other vertically. Four sets of casters are fixedly installed at the lower end of the nursing cart. Protective side plates are fixedly installed on all four sides of the first placement plate at the lower end of the nursing cart. A negative pressure pump is fixedly installed on the upper right side of the first placement plate. The suction port of the negative pressure pump... A main pipe is fixedly installed with nuts. A blood storage tank is fixedly installed on the left end of the first placement plate. A tank cover is fixedly installed on the upper end of the blood storage tank with multiple sets of bolts. A branch pipe is provided on the upper right side of the blood storage tank. The main pipe is connected to the branch pipe. A branch pipe is provided on the tank cover. A connector is provided at the upper end of the branch pipe. A drain tube is provided at the lower end of the blood storage tank. A through hole is opened in the left end of the second placement plate. The upper end of the branch pipe is inserted into the through hole. A filter assembly for blood purification is provided inside the blood storage tank. A micro control assembly is provided on the branch pipe.

[0008] As a preferred technical solution of this application, the filtration assembly includes a filter box, which is fixedly installed inside the blood storage tank. Three sets of filter supports are provided in the lower end of the filter box. A first filter layer is provided in the upper filter support of the filter box, a second filter layer is provided in the middle filter support of the filter box, and an adsorption layer is provided in the lower filter support of the filter box. The three sets of first filter layers are arranged parallel to each other vertically.

[0009] As a preferred technical solution of this application, a first flow control valve is provided between the main pipeline and the blood storage tank, and a second flow control valve is provided at the front end of the discharge tube.

[0010] As a preferred technical solution of this application, a flow sensor is fixedly installed between the main pipe and the branch pipe. The flow sensor is located on the left side of the first flow control valve and is connected to an external display.

[0011] As a preferred technical solution of this application, a negative pressure sensor is fixedly installed on the can lid, and the negative pressure sensor is connected to an external display.

[0012] As a preferred technical solution of this application, a fixing frame is sleeved at the connection between the branch pipe and the connector, a storage plate is provided on the upper side of the second placement plate, the fixing frame is clamped on the storage plate, a receiving groove is opened in the fixing frame, a sealing cover is movably installed at the upper opening of the receiving groove, and the connection between the branch pipe and the connector is located in the receiving groove.

[0013] As a preferred technical solution of this application, the connection between the branch pipe and the connector is a foldable flexible hose, and the material of the connection between the branch pipe and the connector is a medical-grade PVC pipe.

[0014] As a preferred technical solution of this application, a storage box is provided on the upper right side of the second placement plate. Multiple sets of U-shaped clamps are fixedly installed inside the storage box. A curved tube suction head is clamped on the U-shaped clamp at the front end of the storage box, a straight tube suction head is clamped on the U-shaped clamp in the middle part of the storage box, and a thin tube suction head is clamped on the U-shaped clamp at the rear end of the storage box. The curved tube suction head, the straight tube suction head, and the thin tube suction head are arranged in parallel front to back.

[0015] As a preferred technical solution of this application, the fixing frame has sliding grooves at both the front and rear ends, and connecting rods are movably inserted into both sets of sliding grooves. Return springs are provided on the upper and lower sides of both sets of sliding grooves. Clamping arms are fixedly installed at opposite ends of both sets of connecting rods. Screws are rotatably installed in both sets of clamping arms. Slide plates are threadedly connected to the lower ends of both sets of screws. Connecting rods are rotatably installed at both the front and rear ends of both sets of slide plates. Clamping plates are rotatably installed on the lower side of both sets of clamping arms. The four clamping plates are rotatably connected to the four sets of connecting rods.

[0016] As a preferred technical solution of this application, the two sets of clamping plates on the lower side of the two sets of clamping arms are symmetrically arranged front and back, and the cross-section of the two sets of clamping plates on the lower side of the two sets of clamping arms is L-shaped.

[0017] As a preferred technical solution of this application, a foot pedal bracket is rotatably installed on the protective side plate on the lower right side of the nursing cart, and a foot pedal switch is fixedly installed on the foot pedal bracket. The foot pedal switch is connected to the control switch of the negative pressure pump.

[0018] As a preferred technical solution of this application, a plurality of connecting pipes are fixedly installed at the lower end of the filter box, a storage box is fixedly installed inside the lower end of the blood storage tank, the lower ends of the plurality of connecting pipes are fixedly connected to the storage box, a drive motor is fixedly installed at the lower end of the blood storage tank, a stirring blade is fixedly installed on the output shaft of the drive motor, the upper end of the stirring blade is located inside the storage box, and the storage box is connected to the draining blood vessel.

[0019] As a preferred technical solution of this application, the microcontroller component includes a microcontroller, which is fixedly installed on the branch pipe. A blood inlet is provided on the upper front side of the microcontroller. A limiting rod is movably inserted inside the microcontroller. A blocking block is fixedly installed inside the lower end of the microcontroller. A threaded sleeve is threaded onto the lower end of the blocking block. The lower end of the limiting rod is rotatably connected to the threaded sleeve. A fixing plate is fixedly installed inside the microcontroller. A sealing plate is movably installed on the limiting rod, positioned above the fixing plate. A flow guide sleeve is fixedly installed on the upper side of the sealing plate. A sealing block is fixedly installed at the upper end of the limiting rod. A limiting spring is sleeved on the sealing plate. The lower end of the sealing block is inserted into the upper end of the flow guide sleeve. A blood discharge port is provided at the lower end of the microcontroller. An opening in the fixing plate connects to the lower end of the microcontroller and the blood discharge port.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The suction device for coronary artery bypass surgery described in this invention utilizes the cooperation of a negative pressure pump, main pipeline, blood storage tank, tank lid, and branch pipes. It connects and replaces curved suction heads, straight suction heads, and thin suction heads within a storage box with connectors, allowing for adjustments based on wound location and blood flow during surgery. This process aspirates blood, and the blood is stored through multiple connecting pipes and a storage box at the lower end of the blood storage tank's filter box. This prevents blood from drying out after absorption and ensures blood remains flowing within the storage tank. A drive motor agitates the blood in the storage box, preventing coagulation and improving blood utilization. This device effectively avoids interference from blood flow in the surgical field, ensuring a clear surgical view and thus improving the accuracy and safety of the surgery.

[0022] 2. The suction device for coronary artery bypass surgery described in this invention, in use, uses a main pipe and a negative pressure pump to draw blood into a blood storage tank. A filter assembly is used to filter and purify the blood. A branch pipe and connector are used to export the purified blood for recycling. The filter assembly purifies the aspirated blood, facilitating subsequent blood recycling, avoiding waste of blood resources, reducing surgical costs, alleviating the economic burden on patients, and preventing dried blood from contaminating the surgical environment, thus ensuring the hygiene of the operating room.

[0023] 3. The suction device for coronary artery bypass surgery described in this invention, through the setting of a flow sensor and a negative pressure sensor, can facilitate the observation and monitoring of gas flow changes and the real-time monitoring of negative pressure value in the blood storage tank. Through the setting of a flow sensor and a negative pressure sensor, the negative pressure value and gas flow data in the blood storage tank can be easily transmitted to an external display in real time, which is convenient for medical staff to observe and record in real time.

[0024] 4. The suction device for coronary artery bypass surgery described in this invention fits the fixation frame with the sternal retractor. By rotating two sets of screws, four sets of sliding plates, four sets of connecting rods, and four sets of clamps are contracted, causing the four sets of clamps to be locked onto the sternal retractor. This improves stability when the branch tube and connector are connected to the curved suction head, straight suction head, and thin suction head to aspirate fluid from the wound, preventing shaking or displacement during surgery. This further improves the stability and safety of blood absorption during surgery. Furthermore, when aspirating blood from the wound using the curved suction head, straight suction head, and thin suction head, the micro-control component allows for micro-control of the suction force of the negative pressure pump according to surgical needs. This enables small-amplitude adjustments to the suction force when the negative pressure pump aspirates blood, ensuring effective blood aspiration during surgery. The limiting rod and sealing plate within the micro-controller work together to achieve precise control of the blood flow rate. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the right-side structure of the present invention;

[0028] Figure 3 This is a front view structural diagram of the nursing cart in this invention;

[0029] Figure 4 This is a front view schematic diagram of the negative pressure pump and blood storage tank in this invention;

[0030] Figure 5 This is a front view cross-sectional schematic diagram of the blood storage tank in this invention;

[0031] Figure 6 This is a schematic cross-sectional view of the left side of the fixing frame in this invention;

[0032] Figure 7 This is a front view cross-sectional schematic diagram of the filter component in this invention;

[0033] Figure 8 This is a top view cross-sectional diagram of the storage box in this invention;

[0034] Figure 9 This is a top view cross-sectional diagram of the micro control component in this invention;

[0035] Figure 10 yes Figure 6 Enlarged view of a portion of point A in the middle.

[0036] In the diagram: 1. Nursing cart; 2. First placement plate; 3. Second placement plate; 4. Casters; 5. Protective side plate; 6. Negative pressure pump; 7. Main pipeline; 8. First flow control valve; 9. Flow sensor; 10. Blood storage tank; 11. Tank lid; 12. Branch pipe; 13. Connector; 14. Fixing frame; 15. Drainage tube; 16. Second flow control valve; 17. Storage plate; 18. Storage box; 19. Through hole; 20. U-shaped clamp; 21. Bent tube suction head; 22. Straight tube suction head; 23. Thin tube suction head; 24. Negative pressure sensor; 25. Filter box; 26. Filter bracket; 27. First filter. 28. Second filter layer; 29. ​​Adsorption layer; 30. Slide groove; 31. Connecting rod; 32. Return spring; 33. Clamping arm; 34. Screw; 35. Slide plate; 36. Connecting rod; 37. Clamping plate; 38. Receiving groove; 39. Sealing cover; 40. Foot pedal bracket; 41. Foot switch; 42. Connecting pipe; 43. Storage box; 44. Drive motor; 45. Stirring blade; 46. Microcontroller; 47. Blood inlet; 48. Limiting rod; 49. Block; 50. Screw sleeve; 51. Fixing plate; 52. Sealing plate; 53. Flow guide sleeve; 54. Sealing block; 55. Limiting spring; 56. Blood outlet. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] like Figures 1 to 10As shown in the embodiment of the present invention, a suction device for coronary artery bypass surgery includes a nursing cart 1. A first placement plate 2 is fixedly installed at the lower end of the nursing cart 1, and a second placement plate 3 is fixedly installed at the upper end of the nursing cart 1. The first placement plate 2 and the second placement plate 3 are arranged parallel to each other vertically. Four sets of universal wheels 4 are fixedly installed at the lower end of the nursing cart 1. Protective side plates 5 are fixedly installed on the front, back, left, and right sides of the first placement plate 2 at the lower end of the nursing cart 1. A negative pressure pump 6 is fixedly installed on the upper right side of the first placement plate 2. The suction port of the negative pressure pump 6 is fixedly installed with a main pipe 7 through a nut. A blood storage tank 10 is fixedly installed on the left end of a placement plate 2. A tank cover 11 is fixedly installed on the upper end of the blood storage tank 10 by multiple sets of bolts. A branch pipe 12 is provided on the upper right side of the blood storage tank 10. The main pipe 7 is connected to the branch pipe 12. A branch pipe 12 is provided on the tank cover 11. A connector 13 is provided on the upper end of the branch pipe 12. A drain tube 15 is provided on the lower end of the blood storage tank 10. A through hole 19 is opened in the left end of the second placement plate 3. The upper end of the branch pipe 12 is inserted into the through hole 19. A filter assembly for blood purification is provided inside the blood storage tank 10. A micro control assembly is provided on the branch pipe 12.

[0039] The negative pressure pump 6 generates suction that flows through the main pipe 7, blood storage tank 10, tank lid 11, branch pipe 12, and connector 13. The connector 13 is then placed against the surgical wound, and the suction draws blood from the surgical wound into the blood storage tank 10 for storage, preventing blood flow from interfering with the surgical field. At the same time, the filter component inside the blood storage tank 10 filters and purifies the drawn-in blood, ensuring the quality of the recovered blood. The blood storage tank 10 is then connected to the blood transfusion device through the drain tube 15, facilitating the return of blood to the patient, improving blood utilization and avoiding waste of blood resources.

[0040] like Figures 5 to 7 As shown, the filtration assembly includes a filter box 25, which is fixedly installed inside the blood storage tank 10. Three sets of filter supports 26 are provided in the lower end of the filter box 25. A first filter layer 27 is provided in the upper filter support 26 inside the filter box 25, a second filter layer 28 is provided in the middle filter support 26 inside the filter box 25, and an adsorption layer 29 is provided in the lower filter support 26 inside the filter box 25. The three sets of first filter layers 27 are arranged parallel to each other vertically.

[0041] The three sets of first filter layers 27, second filter layers 28, and adsorption layers 29 are all filters of different precision, which can perform step-by-step filtration and purification of the inhaled blood to ensure the quality of the recovered blood. Among them, the first filter layer 27 is a polyester fiber filter that intercepts blood clots and tissue fragments and can filter out larger impurities and particulate matter in the blood. The second filter layer 28 is a nylon filter that separates blood cells and plasma and further filters out tiny impurities in the blood. The adsorption layer 29 is an activated carbon layer that removes free hemoglobin and toxins. Thus, the blood can be finally filtered and purified to ensure that the recovered blood meets the requirements for reinfusion.

[0042] like Figures 1 to 4 As shown, a first flow control valve 8 is installed between the main pipeline 7 and the blood storage tank 10, and a second flow control valve 16 is installed at the front end of the discharge tube 15.

[0043] The first flow control valve 8, installed on the main pipe 7, controls the flow rate of suction generated by the negative pressure pump 6. Medical staff can manually operate the first flow control valve 8 to precisely regulate the suction generated by the negative pressure pump 6. This not only improves the flexibility of surgical procedures but also helps reduce unnecessary damage during surgery and protects the patient's tissues and organs. At the same time, the second flow control valve 16 facilitates the connection and control of the draining tube 15, ensuring that blood can be smoothly discharged for recycling. In addition, the entire device has a compact structure and reasonable design, which facilitates efficient and safe blood aspiration and recycling in coronary artery bypass surgery.

[0044] like Figures 1 to 4 As shown, a flow sensor 9 is fixedly installed between the main pipe 7 and the branch pipe 12. The flow sensor 9 is located to the left of the first flow control valve 8 and is connected to an external display.

[0045] The flow sensor 9 can monitor and display the suction flow generated by the negative pressure pump 6 in real time, allowing medical staff to understand the working status of the device at any time and make timely adjustments. At the same time, by connecting to an external display, medical staff can intuitively observe these data, improving the efficiency and safety of the operation.

[0046] like Figures 1 to 4 As shown, a negative pressure sensor 24 is fixedly installed on the can lid 11, and the negative pressure sensor 24 is connected to an external display.

[0047] The negative pressure sensor 24 can monitor the negative pressure value inside the blood storage tank 10 in real time and transmit the data to an external display, enabling medical staff to monitor the blood aspiration situation inside the blood storage tank 10 in real time, ensuring the smooth progress of the operation. Medical staff can adjust the working status of the device in a timely manner according to the changes in the negative pressure value to ensure that the blood can be aspirated and recovered smoothly and efficiently.

[0048] like Figures 1 to 6 As shown, a fixing frame 14 is sleeved at the connection between the branch pipe 12 and the connector 13. A storage plate 17 is provided on the upper side of the second placement plate 3. The fixing frame 14 is clamped on the storage plate 17. A receiving groove 38 is opened in the fixing frame 14. A sealing cover 39 is movably installed at the upper opening of the receiving groove 38. The connection between the branch pipe 12 and the connector 13 is located in the receiving groove 38.

[0049] The fixed bracket 14 facilitates the protection of the connection between the branch tube 12 and the connector 13. The fixed bracket 14 is also secured to the storage plate 17, ensuring that the branch tube 12 and the connector 13 can be stored when not in use. At the same time, the opening of the sealing cover 39 allows medical staff to easily assemble and disassemble the connection between the branch tube 12 and the connector 13, improving the convenience of surgical operations. In addition, by attaching the fixed bracket 14 to the sternal retractor, the stability of the entire device during the operation can be further improved, ensuring the smooth progress of the operation.

[0050] like Figures 1 to 5 As shown, the connection between branch pipe 12 and connector 13 is a foldable flexible hose, and the material of the connection between branch pipe 12 and connector 13 is medical-grade PVC pipe.

[0051] Medical-grade PVC tubing has excellent flexibility and corrosion resistance, ensuring the safety and stability of blood flow. At the same time, the foldable tubing design allows medical staff to flexibly adjust the connection between the branch tube 12 and the connector 13 according to the needs of the surgery, improving the flexibility and efficiency of the operation.

[0052] like Figures 1 to 8 As shown, a storage box 18 is provided on the upper right side of the second placement plate 3. Multiple sets of U-shaped clamps 20 are fixedly installed inside the storage box 18. A bent tube suction head 21 is clamped on the U-shaped clamp 20 at the front end of the storage box 18, a straight tube suction head 22 is clamped on the U-shaped clamp 20 in the middle part of the storage box 18, and a thin tube suction head 23 is clamped on the U-shaped clamp 20 at the rear end of the storage box 18. The bent tube suction head 21, the straight tube suction head 22 and the thin tube suction head 23 are arranged in parallel front to back.

[0053] The curved suction head 21, straight suction head 22, and thin suction head 23 are all connectors of different specifications, which facilitates medical staff to select and use them according to the needs of the operation, improving the flexibility and adaptability of the operation. Among them, the curved suction head 21 is used to accurately aspirate blood and tissue fluid in the surgical field and is suitable for connecting to a high-flow blood transfusion device, which can quickly replenish the patient's blood. The straight suction head 22 is suitable for direct absorption of bleeding from large wounds. The thin suction head 23 is suitable for bleeding from smaller coronary artery branches and can perform delicate blood reinfusion operations on the patient. The use of the curved suction head 21, straight suction head 22, and thin suction head 23 improves the practicality and application range of the device.

[0054] like Figures 6 to 10 As shown, the front and rear ends of the fixed frame 14 are provided with sliding grooves 30. Connecting rods 31 are movably inserted into the two sets of sliding grooves 30. Return springs 32 are provided on the upper and lower sides of the two sets of sliding grooves 30. Clamping arms 33 are fixedly installed on the opposite ends of the two sets of connecting rods 31. Screws 34 are rotatably installed in the two sets of clamping arms 33. Slide plates 35 are threadedly connected to the lower ends of the two sets of screws 34. Connecting rods 36 are rotatably installed on the front and rear ends of the two sets of slide plates 35. Clamping plates 37 are rotatably installed on the lower side of the two sets of clamping arms 33. The four sets of clamping plates 37 are rotatably connected to the four sets of connecting rods 36.

[0055] The clamping assembly, consisting of two sets of locking arms 33, two sets of screws 34, two sets of sliding plates 35, four sets of connecting rods 36, and four sets of clamping plates 37, further enhances the stability of the connection between the fixation frame 14 and the sternal retractor. During use, medical personnel can rotate the two sets of screws 34 to retract the two sets of sliding plates 35, four sets of connecting rods 36, and four sets of clamping plates 37, causing the four sets of clamping plates 37 to engage with the sternal retractor. This ensures a tighter fit between the fixation frame 14 and the sternal retractor, preventing shaking or displacement during surgery and further improving the stability and safety of blood suction during the procedure. Simultaneously, the movable insertion design of the two sets of connecting rods 31 within the two sets of sliding grooves 30 allows medical personnel to easily adjust the device according to different sizes of the sternal retractor, improving its applicability and flexibility.

[0056] like Figures 6 to 10 As shown, the two sets of clamping plates 37 on the lower side of the two sets of clamping arms 33 are symmetrically arranged front and back, and the cross-section of the two sets of clamping plates 37 on the lower side of the two sets of clamping arms 33 is L-shaped.

[0057] The L-shaped clamp 37 design allows for a more secure mounting on the sternal retractor, preventing it from falling off or shifting due to external forces during surgery. This further enhances the stability of the fixation frame 14 during the procedure. In addition, the rotating connection design of the four clamps 37 and the four connecting rods 36 makes the clamping assembly more flexible in use, allowing medical staff to adjust it according to the needs of the surgery, thus improving the efficiency and safety of the operation.

[0058] like Figures 1 to 2 As shown, a foot pedal bracket 40 is rotatably mounted on the protective side plate 5 on the lower right side of the nursing cart 1. A foot pedal switch 41 is fixedly mounted on the foot pedal bracket 40, and the foot pedal switch 41 is connected to the control switch of the negative pressure pump 6.

[0059] The foot pedal bracket 40 and foot switch 41 allow medical staff to operate the negative pressure pump 6 by stepping on it when it is inconvenient to use their hands to touch it. This improves the safety and convenience of the surgical procedure. Medical staff can control the negative pressure pump 6 by stepping on the foot pedal bracket 40, which not only helps reduce the difficulty of operation for medical staff during the operation, but also effectively avoids the risk of cross-infection that may be caused by direct contact with surgical instruments, further ensuring the safety and hygiene of the operation.

[0060] like Figures 4 to 5 As shown, multiple sets of connecting pipes 42 are fixedly installed at the lower end of the filter box 25, and a storage box 43 is fixedly installed inside the lower end of the blood storage tank 10. The lower ends of the multiple sets of connecting pipes 42 are fixedly connected to the storage box 43. A drive motor 44 is fixedly installed at the lower end of the blood storage tank 10. A stirring blade 45 is fixedly installed on the output shaft of the drive motor 44. The upper end of the stirring blade 45 is inside the storage box 43. The storage box 43 is connected to the discharge tube 15.

[0061] The filtered blood can be introduced into the storage box 43 through the connecting tube 42, ensuring the flow of blood in the blood storage tank 10 and preventing the blood from clotting due to static conditions. The installed drive motor 44 and stirring blade 45 rotate slowly to periodically stir the blood in the storage box 43, preventing blood from settling and clumping, which facilitates subsequent recycling. By connecting the storage box 43 to the drain tube 15, it can be ensured that the normal discharge of blood is not affected during the stirring process, ensuring the smooth progress of the operation.

[0062] like Figures 4 to 6As shown, the microcontroller assembly includes a microcontroller 46, which is fixedly mounted on the branch pipe 12. A blood inlet 47 is provided on the upper front side of the microcontroller 46. A limiting rod 48 is movably inserted inside the microcontroller 46. A blocking block 49 is fixedly installed inside the lower end of the microcontroller 46. A threaded sleeve 50 is threadedly connected to the lower end of the blocking block 49. The lower end of the limiting rod 48 is rotatably connected to the threaded sleeve 50. A fixing plate 51 is fixedly installed inside the microcontroller 46. A sealing plate 52 is movably installed on the limiting rod 48, positioned above the fixing plate 51. A flow guide sleeve 53 is fixedly installed on the upper side of the sealing plate 52. A sealing block 54 is fixedly installed at the upper end of the limiting rod 48. A limiting spring 55 is sleeved on the sealing plate 52. The lower end of the sealing block 54 is inserted into the upper end of the flow guide sleeve 53. A blood outlet 56 is provided at the lower end of the microcontroller 46. An opening in the fixing plate 51 connects to the lower end of the microcontroller 46 and the blood outlet 56.

[0063] By twisting the screw sleeve 50, the limiting rod 48 can be moved up and down. When it is necessary to control blood flow, medical staff can manually twist the screw sleeve 50 to move the limiting rod 48 upward. At this time, the sealing block 54 moves out from the upper end of the guide sleeve 53, and the limiting rod 48 moves the sealing plate 52 upward, thereby moving the sealing plate 51 away from the fixed plate 52, so that the blood inlet 47 and the blood outlet 56 are in a connected state. Blood can flow through the microcontroller 46, and the flow rate of the suction force generated by the negative pressure pump 6 through the microcontroller 46 can be controlled according to the range of movement of the limiting rod 48 caused by twisting the screw sleeve 50, thereby achieving fine adjustment of the suction blood flow.

[0064] Working principle: In use, medical staff first select the appropriate curved suction head 21, straight suction head 22, or thin suction head 23 according to the coronary artery bypass surgery wound, and lock it onto the connector 13 connected to the branch tube 12. Then, the fixation frame 14 is aligned with the sternal retractor. The sternal retractor is then unfolded, allowing the two sets of reset springs 32 and two sets of clamping arms 33 to slide out and align with the sternal retractor. The two sets of screws 34 are then rotated, causing the two sets of sliding plates 35 to slide downwards. These sliding plates, through the four sets of connecting rods 36, cause the four sets of clamps 37 to retract, thus locking onto the sternal retractor. This completes the fixation of the fixation frame 14, ensuring its stability. The closer fit with the sternal retractor prevents shaking or displacement during surgery, further improving the stability and safety of blood suction. Then, the curved suction head 21, straight suction head 22, or thin suction head 23 connected to connector 13 is placed against the surgical wound. Suction is generated by the negative pressure pump 6, opening the first flow control valve 8. The suction flows through the main pipe 7 into the blood storage tank 10. When the curved suction head 21, straight suction head 22, or thin suction head 23 connected to connector 13 suctions blood, the screw sleeve 50 at the lower end of the microcontroller 46 rotates on the block 49, thereby causing the limiting rod 48 to move up and down within the microcontroller 46, thus adjusting the sealing plate. The gap between plate 52 and fixed plate 51 allows for precise control of the blood flow rate. When blood is drawn in and enters branch tube 12 through curved suction head 21, straight suction head 22, or thin suction head 23, it is first regulated by microcontroller 46, and then flows into blood storage tank 10, ensuring the stability and controllability of the suction flow rate. Blood is absorbed through branch tube 12, connector 13, and connected curved suction head 21, straight suction head 22, or thin suction head 23, drawing blood from the surgical wound into blood storage tank 10 for storage. Simultaneously, the blood entering blood storage tank 10 flows downward through filter box 25, and the first filter layer 27 within filter box 25... The second filter layer 28 and the adsorption layer 29 perform stepwise filtration and purification of the inhaled blood to ensure the quality of the recovered blood. The filtered blood flows into the storage box 43 through multiple sets of connecting pipes 42. At this time, the drive motor 44 drives the stirring blade 45 to rotate slowly, stirring the blood in the storage box 43 to prevent blood sedimentation and clumping, and to ensure that the blood is in a flowing state. Medical staff can monitor and display the suction flow and the negative pressure value in the blood storage tank 10 in real time by observing the flow sensor 9 and the negative pressure sensor 24 on the external display. Medical staff can connect the blood storage tank 10 to the blood transfusion device through the drain tube 15 and turn the second flow control valve 16 to open it, so that the blood can be transfused back into the patient's body.

[0065] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0066] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0067] The foregoing has shown and described 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 to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A suction device for use in coronary artery bypass surgery, comprising a nursing cart (1), characterized in that: The lower end of the nursing cart (1) is fixedly equipped with a first placement plate (2), and the upper end of the nursing cart (1) is fixedly equipped with a second placement plate (3). The first placement plate (2) and the second placement plate (3) are arranged parallel to each other vertically. The lower end of the nursing cart (1) is fixedly equipped with four sets of universal wheels (4). The lower end of the nursing cart (1) is fixedly equipped with protective side plates (5) on the front, back, left, and right sides of the first placement plate (2). The upper right side of the first placement plate (2) is fixedly equipped with a negative pressure pump (6). The suction port of the negative pressure pump (6) is fixedly equipped with a main pipe (7) through a nut. The left side of the first placement plate (2) is fixedly equipped with a blood storage tank (10). The upper end of the blood storage tank (10) is fixed with a tank cover (11) by multiple sets of bolts. A branch pipe (12) is provided on the upper right side of the blood storage tank (10). The main pipe (7) is connected to the branch pipe (12). A branch pipe (12) is provided on the tank cover (11). A connector (13) is provided at the upper end of the branch pipe (12). A drain tube (15) is provided at the lower end of the blood storage tank (10). A through hole (19) is opened in the left end of the second placement plate (3). The upper end of the branch pipe (12) is inserted into the through hole (19). A filter assembly for blood purification is provided in the blood storage tank (10). A micro control assembly is provided on the branch pipe (12).

2. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: The filtration assembly includes a filter box (25), which is fixedly installed inside the blood storage tank (10). Three sets of filter supports (26) are provided in the lower end of the filter box (25). A first filter layer (27) is provided in the upper filter support (26) of the filter box (25), a second filter layer (28) is provided in the middle filter support (26) of the filter box (25), and an adsorption layer (29) is provided in the lower filter support (26) of the filter box (25). The three sets of first filter layers (27) are arranged in parallel vertically.

3. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: A first flow control valve (8) is provided between the main pipeline (7) and the blood storage tank (10), and a second flow control valve (16) is provided at the front end of the draining tube (15); A flow sensor (9) is fixedly installed between the main pipe (7) and the branch pipe (12). The flow sensor (9) is located to the left of the first flow control valve (8). The flow sensor (9) is connected to an external display. A negative pressure sensor (24) is fixedly installed on the can lid (11), and the negative pressure sensor (24) is connected to an external display.

4. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: A fixing bracket (14) is sleeved at the connection between the branch pipe (12) and the connector (13). A storage plate (17) is provided on the upper side of the second placement plate (3). The fixing bracket (14) is clamped on the storage plate (17). A receiving groove (38) is opened in the fixing bracket (14). A sealing cover (39) is movably installed at the upper opening of the receiving groove (38). The connection between the branch pipe (12) and the connector (13) is located in the receiving groove (38).

5. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: The connection between the branch pipe (12) and the connector (13) is a foldable flexible hose, and the material of the connection between the branch pipe (12) and the connector (13) is a medical-grade PVC pipe.

6. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: A storage box (18) is provided on the upper right side of the second placement plate (3). Multiple sets of U-shaped clamps (20) are fixedly installed inside the storage box (18). A bent tube suction head (21) is clamped on the U-shaped clamp (20) at the front end of the storage box (18). A straight tube suction head (22) is clamped on the U-shaped clamp (20) in the middle part of the storage box (18). A thin tube suction head (23) is clamped on the U-shaped clamp (20) at the rear end of the storage box (18). The bent tube suction head (21), the straight tube suction head (22), and the thin tube suction head (23) are arranged in parallel front to back.

7. The suction device for coronary artery bypass surgery according to claim 4, characterized in that: The fixing frame (14) has sliding grooves (30) at both the front and rear ends. Connecting rods (31) are movably inserted into both sets of sliding grooves (30). Return springs (32) are provided on both the upper and lower sides of both sets of sliding grooves (30). A locking arm (33) is fixedly installed on the opposite end of both sets of connecting rods (31). A screw (34) is rotatably installed in both sets of locking arms (33). A sliding plate (35) is threadedly connected to the lower end of both sets of screws (34). A connecting rod (36) is rotatably installed at both the front and rear ends of both sets of sliding plates (35). A clamping plate (37) is rotatably installed on the lower side of both sets of locking arms (33). The four clamping plates (37) are rotatably connected to the four connecting rods (36).

8. The suction device for coronary artery bypass surgery according to claim 7, characterized in that: The two sets of clamping plates (37) on the lower side of the two sets of clamping arms (33) are symmetrically arranged front and back. The cross-section of the two sets of clamping plates (37) on the lower side of the two sets of clamping arms (33) is L-shaped. A foot pedal bracket (40) is rotatably installed on the protective side plate (5) on the lower right side of the nursing cart (1). A foot pedal switch (41) is fixedly installed on the foot pedal bracket (40). The foot pedal switch (41) is connected to the control switch of the negative pressure pump (6).

9. The suction device for coronary artery bypass surgery according to claim 2, characterized in that: Multiple sets of connecting pipes (42) are fixedly installed at the lower end of the filter box (25). A storage box (43) is fixedly installed inside the lower end of the blood storage tank (10). The lower ends of the multiple sets of connecting pipes (42) are fixedly connected to the storage box (43). A drive motor (44) is fixedly installed at the lower end of the blood storage tank (10). A stirring blade (45) is fixedly installed on the output shaft of the drive motor (44). The upper end of the stirring blade (45) is inside the storage box (43). The storage box (43) is connected to the draining tube (15).

10. The suction device for coronary artery bypass surgery according to claim 1, characterized in that: The microcontroller assembly includes a microcontroller (46), which is fixedly mounted on the branch pipe (12). A blood inlet (47) is provided on the upper front side of the microcontroller (46). A limiting rod (48) is movably inserted inside the microcontroller (46). A plug (49) is fixedly installed inside the lower end of the microcontroller (46). A threaded sleeve (50) is threaded onto the lower end of the plug (49). The lower end of the limiting rod (48) is rotatably connected to the threaded sleeve (50). A fixing plate (51) is fixedly installed inside the microcontroller (46). A sealing plate (52) is movably installed on the rod (48). The sealing plate (52) is located on the upper side of the fixed plate (51). A flow guide sleeve (53) is fixedly installed on the upper side of the sealing plate (52). A sealing block (54) is fixedly installed on the upper end of the limiting rod (48). A limiting spring (55) is sleeved on the sealing plate (52). The lower end of the sealing block (54) is inserted into the upper end of the flow guide sleeve (53). A blood drain port (56) is provided at the lower end of the microcontroller (46). The opening in the fixed plate (51) is connected to the lower end of the microcontroller (46) and the blood drain port (56).

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