An extracorporeal membrane oxygenation (ECMO) weaning residual blood recovery device

Abstract

The present invention provides a residual blood recovery device during ECMO weaning, belonging to the field of medical devices. It includes an ECMO machine, a first cannula and a second cannula are fixedly connected to the front end of the ECMO machine. A first hollow column is fixedly connected to the first cannula, and a first drainage tube is fixedly connected to the first hollow column. A second hollow column is fixedly connected to the second cannula, and a second drainage tube is fixedly connected to the second hollow column. Through the suction recovery assembly, the blood with a higher concentration in the second drainage tube and the first drainage tube is suction-collected, improving the recovery and reuse of blood resources. Through the separation assembly and the sealing assembly, the collected blood is sealed and isolated. Through the communication assembly, the first drainage tube is communicated with the second drainage tube. Through the flushing assembly, the residual blood in the second drainage tube and the first drainage tube is flushed, and the residual blood in the second drainage tube and the first drainage tube is flushed into the collection bottle to ensure that the residual blood is completely recovered and effectively utilized.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more specifically, to a residual blood recovery device during ECMO weaning. Background Art

[0002] ECMO is an advanced extracorporeal life support technology. It uses a centrifugal pump and an oxygenator to draw the patient's venous blood out of the body, oxygenate it, and then transfuse it back into the body, thereby providing temporary support for the heart or lungs. The ECMO device mainly consists of a centrifugal pump, an oxygenator, a pipeline, an intubation tube, etc. Its working principle is that the centrifugal pump draws out venous blood, conducts gas exchange through the oxygenator, and then transfuses the oxygen-rich blood back into the patient's body;

[0003] During the existing ECMO weaning process, a certain amount of residual blood remains in the ECMO pipeline and cannot be recovered in time. If this blood is not properly treated, it will not only cause waste of blood resources, but also during the recovery process, there may be some blood exposed to the air and vulnerable to contamination. Summary of the Invention

[0004] Aiming at the problem in the prior art that a certain amount of residual blood remains in the ECMO pipeline and cannot be recovered in time. If this blood is not properly treated, it will not only cause waste of blood resources, but also during the recovery process, there may be some blood exposed to the air and vulnerable to contamination, the purpose of the present invention is to provide a residual blood recovery device during ECMO weaning.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A residual blood recovery device during ECMO weaning, including an ECMO machine. A first intubation tube and a second intubation tube are fixedly connected to the front end of the ECMO machine. A first hollow column is fixedly connected to the first intubation tube. A first drainage tube is fixedly connected to the first hollow column. A second hollow column is fixedly connected to the second intubation tube. A second drainage tube is fixedly connected to the second hollow column. The same sterile connection tube is arranged between the first drainage tube and the second drainage tube. A support plate is fixedly connected to the front end of the ECMO machine. An aspiration recovery assembly for aspirating the residual blood in the first drainage tube and the second drainage tube and a flushing assembly for flushing the residual blood in the first drainage tube and the second drainage tube are arranged on the support plate. A separation assembly and a sealing assembly for stratifying the residual blood are arranged on the aspiration recovery assembly. A communication assembly for communicating the first intubation tube, the first drainage tube, the sterile connection tube, the second drainage tube, and the second intubation tube is arranged on the first hollow column and the second hollow column.

[0007] Optionally, the suction and recovery component includes a first L-shaped tube fixedly connected to the first hollow column. A collection bottle is fixedly connected to the top end of the support plate. One end of the first L-shaped tube is fixedly connected to the collection bottle. A first hollow tube is fixedly connected to the collection bottle. A negative pressure device is fixedly connected to the top end of the support plate. One end of the first hollow tube is fixedly connected to the negative pressure device.

[0008] Optionally, the flushing component includes a second L-shaped tube fixedly connected to the second hollow column. A centrifugal pump is fixedly connected to the top end of the support plate. A second hollow tube is fixedly connected to one side of the centrifugal pump. A storage bottle is fixedly connected to the top end of the support plate. One end of the second hollow tube is fixedly connected to the storage bottle.

[0009] Optionally, the partitioning component includes a connecting shaft rotatably connected to the inner wall of the collection bottle. A partition plate is fixedly connected to the outer surface of the connecting shaft. One end of the connecting shaft rotatably penetrates through the collection bottle. A rotating block is fixedly connected to one end of the connecting shaft.

[0010] Optionally, the sealing component includes an airbag disposed on the partition plate. An installation groove is formed on the outer surface of the partition plate. The airbag is fixedly connected inside the airbag. A sliding groove is formed in the middle of the connecting shaft. The airbag communicates with the sliding groove. A piston block is slidably connected to the inner wall of the sliding groove. A sliding rod is fixedly connected to one side of the piston block. The sliding rod slidably penetrates through the rotating block. A pushing block is fixedly connected to one end of the sliding rod.

[0011] Optionally, four thin rods are fixedly connected to the side of the pushing block close to the rotating block. The four thin rods are arranged in a circular shape. The four thin rods all slidably penetrate through the rotating block. The four thin rods are fixedly connected to the same gear at one end. The gear is slidably connected to the outer surface of the connecting shaft. A first magnet is fixedly connected to one side of the gear. A fixed block is fixedly connected to the outer surface of the collection bottle. A tooth groove matching with the gear is formed on the fixed block. A second magnet is fixedly connected to the inner wall of the tooth groove.

[0012] Optionally, the communication component includes two rotating rods respectively rotatably connected inside the first hollow column and the second hollow column. An arc-shaped plate is fixedly connected to the outer surface of the rotating rod. The two rotating rods respectively rotatably penetrate through the upper ends of the first hollow column and the second hollow column. A knob is fixedly connected to the top end of the rotating rod.

[0013] Optionally, circular plates are fixedly connected to the outer surfaces of the two rotating rods. Two bolts are threadedly connected to the circular plates. A plurality of threaded holes matching with the bolts are respectively formed on the first hollow column and the second hollow column.

[0014] Optionally, hoses are fixedly connected to the ends of the first drainage tube and the second drainage tube that are close to each other, the sterile connecting tube is installed between the two sterile connecting tubes, and medical tapes are wound around the connections between the two hoses and the sterile connecting tube.

[0015] Optionally, a T-shaped slider is fixedly connected to the outer surface of the piston block, and a T-shaped chute that cooperates with the T-shaped slider is provided on the connecting shaft.

[0016] The technical solution provided by the present invention has at least the following beneficial effects compared with the prior art:

[0017] In the above solution, when the ECMO machine is withdrawn from the body and the residual blood in the first drainage tube and the second drainage tube needs to be recovered, the first drainage tube and the second drainage tube are cut off, and the first drainage tube and the second drainage tube are connected by the sterile connecting tube to form a closed loop, avoiding the entry of external air or pollutants during the recovery of the residual blood. The first drainage tube is communicated with the first L-shaped tube through the communicating component. Then, through the suction recovery component, the blood with a higher concentration in the second drainage tube and the first drainage tube is suction-collected, improving the recovery and reuse of blood resources, reducing blood waste. The collected blood is sealed and isolated by the partitioning component and the sealing component to prevent the blood from flowing out. Then, the first drainage tube is communicated with the second drainage tube through the communicating component, and the residual blood in the second drainage tube and the first drainage tube is flushed through the flushing component, and the residual blood in the second drainage tube and the first drainage tube is flushed into the collection bottle for recovery of the residual blood, which can ensure that the residual blood in the first drainage tube and the second drainage tube is completely recovered and effectively utilized.

[0018] When the residual blood in the first drainage tube and the second drainage tube needs to be recovered, the negative pressure device is started, and an air negative pressure is generated in the collection bottle through the first hollow tube. Through the action of the negative pressure, the first L-shaped tube guides and suctions the residual blood in the first drainage tube and the second drainage tube. The residual blood in the second drainage tube enters the first drainage tube through the sterile connecting tube, enters the first hollow column through the first drainage tube, and then enters the collection bottle through the first hollow column for collection. The blood with a higher concentration can be recovered, and the collected residual blood still has a higher red blood cell concentration and oxygen-carrying capacity, enabling the blood resources to be recovered and reused, thereby reducing blood waste, improving the quality of the recovered blood and the utilization rate of blood resources, and also avoiding the risk of pollution and infection that may be caused by the exposure of blood to air.

[0019] When it is necessary to flush the second drainage tube and the remaining blood in the second drainage tube, add physiological saline into the storage bottle. Then, start the centrifugal pump to suck the physiological saline in the storage bottle, so that the physiological saline enters the second hollow column through the second L-shaped tube, and then enters the second drainage tube, the sterile connecting tube and the first drainage tube through the second hollow column, flushing the remaining blood attached to the second drainage tube and the first drainage tube. The flushed remaining blood enters the first L-shaped tube through the first hollow column, and then enters the collection bottle through the first L-shaped tube for collection, realizing the recovery of the remaining blood, avoiding the waste of blood resources. Through the flushing effect of the physiological saline, it can ensure that the remaining blood in the first drainage tube and the second drainage tube is thoroughly recovered and effectively utilized.

[0020] When it is necessary to separate the blood with a higher concentration from the remaining blood flushed with physiological saline, turn the rotary block. The rotary block drives the connecting shaft to rotate, and the connecting shaft drives the partition plate to rotate from the horizontal state to the vertical state, facilitating the blood with a higher concentration to enter the collection bottle for collection. After the collection is completed, turn the rotary block again. The rotary block drives the connecting shaft and the partition plate to rotate, turning the partition plate from the vertical state to the horizontal state to seal the blood with a higher concentration in the collection bottle. When the remaining blood flushed with physiological saline enters the collection bottle, through the action of the partition plate, the blood with a higher concentration and the remaining blood flushed with physiological saline can be collected in layers, facilitating the recovery and reuse of the blood. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a structural schematic diagram of the suction recovery component and the flushing component of the present invention;

[0024] Figure 3 is a structural schematic diagram of the first hollow tube and the second hollow tube of the present invention;

[0025] Figure 4 is a left-side sectional structural schematic diagram of the collection bottle of the present invention;

[0026] Figure 5 is a structural schematic diagram of the installation groove of the present invention;

[0027] Figure 6 is a structural schematic diagram of the airbag of the present invention;

[0028] Figure 7 of the present invention Figure Six is an enlarged structural schematic diagram at A;

[0029] Figure 8 Structural schematic diagram of the sealing component of the present invention;

[0030] Figure 9 Structural schematic diagram of the gear, fixed block and tooth groove of the present invention;

[0031] Figure 10 Structural schematic diagram of the connecting component of the present invention;

[0032] Figure 11 Structural schematic diagram of the bolt and threaded hole of the present invention.

[0033] [Reference numerals]

[0034] 101, ECMO machine; 102, first cannula; 103, second cannula; 104, first hollow column; 105, first drainage tube; 106, second hollow column; 107, second drainage tube; 108, sterile connecting tube; 109, support plate; 201, first L-shaped tube; 202, collection bottle; 203, first hollow tube; 204, negative pressure device; 205, second L-shaped tube; 206, centrifugal pump; 207, second hollow tube; 208, storage bottle; 209, connecting shaft; 210, partition; 211, rotating block; 212, airbag; 213, installation groove; 214, sliding groove; 215, piston block; 216, sliding rod; 217, pushing block; 218, thin rod; 219, gear; 220, first magnet; 221, fixed block; 222, tooth groove; 223, second magnet; 224, rotating rod; 225, arc plate; 226, knob; 227, round plate; 228, bolt; 229, threaded hole; 230, hose; 231, medical tape; 232, T-shaped slider; 233, T-shaped sliding groove.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0036] The following describes in detail an extracorporeal membrane oxygenation (ECMO) weaning residual blood recovery device provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0037] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when describing a specific feature, structure, or characteristic in connection with an embodiment, implementing such feature, structure, or characteristic in connection with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0038] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for the existence of other factors that may not be explicitly described.

[0039] It can be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0040] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be similarly interpreted accordingly.

[0041] As Figures 1 to 11As shown in the figure, an extracorporeal membrane oxygenation (ECMO) weaning residual blood recovery device is provided in an embodiment of the present invention, including an ECMO machine 101. A first cannula 102 and a second cannula 103 are fixedly connected to the front end of the ECMO machine 101. A first hollow column 104 is fixedly connected to the first cannula 102, and a first drainage tube 105 is fixedly connected to the first hollow column 104. A second hollow column 106 is fixedly connected to the second cannula 103, and a second drainage tube 107 is fixedly connected to the second hollow column 106. The same sterile connecting tube 108 is arranged between the first drainage tube 105 and the second drainage tube 107. A support plate 109 is fixedly connected to the front end of the ECMO machine 101. An aspiration recovery assembly for aspirating the residual blood in the first drainage tube 105 and the second drainage tube 107 and a flushing assembly for flushing the residual blood in the first drainage tube 105 and the second drainage tube 107 are arranged on the support plate 109. A separation assembly and a sealing assembly for stratifying the residual blood are arranged on the aspiration recovery assembly. A communication assembly for communicating the first cannula 102, the first drainage tube 105, the sterile connecting tube 108, the second drainage tube 107, and the second cannula 103 is arranged on the first hollow column 104 and the second hollow column 106.

[0042] When the ECMO machine 101 is weaned and the residual blood in the first drainage tube 105 and the second drainage tube 107 needs to be recovered, the first drainage tube 105 and the second drainage tube 107 are cut off, and the first drainage tube 105 and the second drainage tube 107 are connected through the sterile connecting tube 108 to form a closed loop, avoiding the entry of external air or contaminants into the residual blood during the recovery process. The first drainage tube 105 is communicated with the first L-shaped tube 201 through the communication assembly. Then, through the aspiration recovery assembly, the blood with a higher concentration in the second drainage tube 107 and the first drainage tube 105 is aspirated and collected, improving the recovery and reuse of blood resources, reducing blood waste. The collected blood is sealed and isolated through the separation assembly and the sealing assembly to prevent the blood from flowing out. Then, the first drainage tube 105 is communicated with the second drainage tube 107 through the communication assembly, and the residual blood in the second drainage tube 107 and the first drainage tube 105 is flushed through the flushing assembly, and the residual blood in the second drainage tube 107 and the first drainage tube 105 is flushed into the collection bottle 202 for recovering the residual blood, which can ensure that the residual blood in the first drainage tube 105 and the second drainage tube 107 is completely recovered and effectively utilized.

[0043] As Figure 2 and Figure 3As shown, the suction and recovery assembly includes a first L-shaped tube 201, the first L-shaped tube 201 is fixedly connected to the first hollow column 104, the top end of the support plate 109 is fixedly connected with a collection bottle 202, one end of the first L-shaped tube 201 is fixedly connected to the collection bottle 202, the collection bottle 202 is fixedly connected with a first hollow tube 203, the top end of the support plate 109 is fixedly connected with a negative pressure device 204, and one end of the first hollow tube 203 is fixedly connected to the negative pressure device 204.

[0044] When it is necessary to recover the remaining blood in the first drainage tube 105 and the second drainage tube 107, start the negative pressure device 204. Through the first hollow tube 203, air negative pressure is generated in the collection bottle 202. Through the action of negative pressure, the first L-shaped tube 201 guides and sucks the remaining blood in the first drainage tube 105 and the second drainage tube 107. The remaining blood in the second drainage tube 107 enters the first drainage tube 105 through the sterile connecting tube 108, enters the first hollow column 104 through the first drainage tube 105, and then enters the collection bottle 202 through the first hollow column 104 for collection. It can recover blood with a relatively high concentration. The collected remaining blood also has a relatively high red blood cell concentration and oxygen-carrying capacity, enabling the blood resources to be recovered and reused, thereby reducing blood waste, improving the quality of the recovered blood and the utilization rate of blood resources, and also avoiding the potential pollution and infection risks caused by the exposure of blood to the air. The remaining blood is flushed into the collection bottle 202 to recover the remaining blood, which can ensure that the remaining blood in the first drainage tube 105 and the second drainage tube 107 is completely recovered and effectively utilized.

[0045] As Figure 2 and Figure 3 As shown, the flushing assembly includes a second L-shaped tube 205, the second L-shaped tube 205 is fixedly connected to the second hollow column 106, the top end of the support plate 109 is fixedly connected with a centrifugal pump 206, one side of the centrifugal pump 206 is fixedly connected with a second hollow tube 207, the top end of the support plate 109 is fixedly connected with a storage bottle 208, and one end of the second hollow tube 207 is fixedly connected to the storage bottle 208.

[0046] When it is necessary to flush the second drainage tube 107 and the remaining blood in the second drainage tube 107, add physiological saline into the storage bottle 208. Then, start the centrifugal pump 206 to suck the physiological saline in the storage bottle 208, so that the physiological saline enters the second hollow column 106 through the second L-shaped tube 205, and then enters the second drainage tube 107, the sterile connecting tube 108 and the first drainage tube 105 through the second hollow column 106 to flush the remaining blood attached in the second drainage tube 107 and the first drainage tube 105. The flushed remaining blood enters the first L-shaped tube 201 through the first hollow column 104, and then enters the collection bottle 202 through the first L-shaped tube 201 for collection, realizing the recovery of the remaining blood, avoiding the waste of blood resources. Through the flushing effect of the physiological saline, it can ensure that the remaining blood in the first drainage tube 105 and the second drainage tube 107 is thoroughly recovered and effectively utilized.

[0047] As Figure 4 and Figure 5 As shown, the partition assembly includes a connecting shaft 209, the connecting shaft 209 is rotatably connected to the inner wall of the collection bottle 202, a partition 210 is fixedly connected to the outer surface of the connecting shaft 209, one end of the connecting shaft 209 rotatably penetrates through the collection bottle 202, and a rotating block 211 is fixedly connected to one end of the connecting shaft 209.

[0048] When it is necessary to separate the blood with a higher concentration from the remaining blood flushed with physiological saline, turn the rotating block 211. The rotating block 211 drives the connecting shaft 209 to rotate, and the connecting shaft 209 drives the partition 210 to rotate from the horizontal state to the vertical state, facilitating the collection of the blood with a higher concentration into the collection bottle 202. After the collection is completed, turn the rotating block 211 again. The rotating block 211 drives the connecting shaft 209 and the partition 210 to rotate, and rotates the partition 210 from the vertical state to the horizontal state to seal the blood with a higher concentration in the collection bottle 202. When the remaining blood flushed with physiological saline enters the collection bottle 202, through the action of the partition 210, the blood with a higher concentration and the remaining blood flushed with physiological saline can be collected in layers, facilitating the recovery and reuse of the blood.

[0049] As Figure 7 and Figure 8 As shown, the sealing assembly includes an airbag 212. The airbag 212 is arranged on the partition 210. An installation groove 213 is formed on the outer surface of the partition 210. The airbag 212 is fixedly connected in the airbag 212. A sliding groove 214 is formed in the middle of the connecting shaft 209. The airbag 212 is communicated with the sliding groove 214. A piston block 215 is slidably connected to the inner wall of the sliding groove 214. A sliding rod 216 is fixedly connected to one side of the piston block 215. The sliding rod 216 slidably penetrates through the rotating block 211, and a pushing block 217 is fixedly connected to one end of the sliding rod 216.

[0050] When it is necessary to tightly seal the partition plate 210 and the collection bottle 202, when the partition plate 210 rotates to the horizontal state, the push block 217 is pushed. The push block 217 drives the sliding rod 216 to slide, and the sliding rod 216 drives the piston block 215 to slide in the sliding groove 214. During the sliding process of the piston block 215, air can be pushed into the airbag 212 for inflation, so that the airbag 212 expands outwards, tightly seals between the partition plate 210 and the collection bottle 202, and avoids the mixing of high-concentration blood and the remaining blood rinsed with physiological saline, thereby improving the quality of the recovered blood.

[0051] As Figure 9 As shown, four thin rods 218 are fixedly connected to one side of the push block 217 close to the rotating block 211. The four thin rods 218 are arranged in a circle. The four thin rods 218 all slide through the rotating block 211. One end of the four thin rods 218 is fixedly connected to the same gear 219. The gear 219 is slidably connected to the outer surface of the connecting shaft 209. One side of the gear 219 is fixedly connected to a first magnet 220. A fixed block 221 is fixedly connected to the outer surface of the collection bottle 202. A tooth groove 222 that cooperates with the gear 219 is formed on the fixed block 221. A second magnet 223 is fixedly connected to the inner wall of the tooth groove 222.

[0052] When it is necessary to lock the rotating block 211 and the push block 217 at the same time, when the push block 217 slides, it also drives a plurality of thin rods 218 to slide. The plurality of thin rods 218 drive the gear 219 and the first magnet 220 to slide. The gear 219 is slid into the tooth groove 222 on the fixed block 221 for engagement. Through the action of the second magnet 223, the first magnet 220 is attracted, thereby completing the restriction of the rotating block 211 and the push block 217, and avoiding the random rotation of the rotating block 211 and the push block 217 when the device recovers the remaining blood, which affects the recovery effect of the remaining blood.

[0053] As Figure 10 As shown, the communication component includes two rotating rods 224. The two rotating rods 224 are respectively rotatably connected in the first hollow column 104 and the second hollow column 106. An arc-shaped plate 225 is fixedly connected to the outer surface of the rotating rod 224. The two rotating rods 224 respectively rotate through the upper ends of the first hollow column 104 and the second hollow column 106. A knob 226 is fixedly connected to the top end of the rotating rod 224.

[0054] When it is necessary to connect the first drainage tube 105 and the first L-shaped tube 201, turn the knob 226. The knob 226 drives the rotating rod 224 to rotate, and the rotating rod 224 drives the arc-shaped plate 225 to rotate. When the arc surface of the arc-shaped plate 225 rotates to the nozzle of the first insertion tube 102, the arc-shaped plate 225 can seal the first insertion tube 102, facilitating the residual blood in the second drainage tube 107 and the first drainage tube 105 to enter the collection bottle 202 through the first hollow column 104 and the first L-shaped tube 201 for recycling. When the arc surface of the arc-shaped plate 225 rotates to the nozzle of one of the pipelines, the arc-shaped plate 225 seals the corresponding nozzle, facilitating the connection of the other two pipelines.

[0055] As Figure 11 shown, circular plates 227 are fixedly connected to the outer surfaces of the two rotating rods 224. Two bolts 228 are threadedly connected to the circular plates 227. A plurality of threaded holes 229 that cooperate with the bolts 228 are respectively formed in the first hollow column 104 and the second hollow column 106.

[0056] When it is necessary to restrict the knob 226, turn the bolt 228 to screw the bolt 228 out of the threaded hole 229. Then, turn the knob 226. The knob 226 drives the rotating rod 224 and the circular plate 227 to rotate to connect the pipelines. After the connection is completed, turn the bolt 228 to screw the bolt 228 into the threaded hole 229 to restrict the knob 226, preventing the knob 226 from rotating randomly during the recycling of residual blood and affecting the recycling of residual blood.

[0057] As Figure 2 shown, flexible hoses 230 are fixedly connected to the ends of the first drainage tube 105 and the second drainage tube 107 that are close to each other. The sterile connecting tube 108 is installed between the two flexible hoses 230. Medical tapes 231 are wound around the joints of the two flexible hoses 230 and the sterile connecting tube 108.

[0058] By providing the flexible hoses 230 and the medical tapes 231, the sterile connecting tube 108 is installed into the two flexible hoses 230, and the medical tapes 231 are wound around the joints of the flexible hoses 230 and the sterile connecting tube 108 to seal the sterile connecting tube 108 and the flexible hoses 230, preventing external air or pollutants from entering during the recycling of residual blood. The medical tapes 231 can also prevent the sterile connecting tube 108 from falling off.

[0059] As Figure 8 shown, a T-shaped slider 232 is fixedly connected to the outer surface of the piston block 215. A T-shaped sliding groove 233 that cooperates with the T-shaped slider 232 is formed in the connecting shaft 209.

[0060] By providing a T-shaped slider 232 and a T-shaped chute 233, when the piston block 215 slides, the piston block 215 also drives the T-shaped slider 232 to slide in the T-shaped chute 233. The T-shaped chute 233 can guide and limit the T-shaped slider 232 and the piston block 215, and can also improve the stability of the piston block 215 during movement.

[0061] The working process provided by the present invention is as follows:

[0062] During use, when the ECMO machine 101 needs to be withdrawn from the machine, the first drainage tube 105 and the second drainage tube 107 are cut off, and the sterile connecting tube 108 is connected by two hoses 230, so that the first drainage tube 105, the sterile connecting tube 108 and the second drainage tube 107 form a closed loop. Then, the medical tape 231 is wound around the connection between the hose 230 and the sterile connecting tube 108 to seal the sterile connecting tube 108 and the hose 230, preventing external air or contaminants from entering during the blood recovery process. Then, the bolt 228 on the second hollow column 106 is turned, and the bolt 228 is screwed out of the threaded hole 229. Then, the knob 226 on the second hollow column 106 is turned, and the knob 226 drives the rotating rod 224 to rotate. The rotating rod 224 drives the arc-shaped plate 225 to rotate. When the arc surface of the arc-shaped plate 225 rotates to the nozzle of the second L-shaped tube 205, the second L-shaped tube 205 is sealed to prevent the physiological saline in the storage bottle 208 from being extracted when draining the remaining blood. The bolt 228 is turned and screwed into the threaded hole 229 to limit the knob 226. Then, the rotating block 211 is turned, and the rotating block 211 drives the connecting shaft 209 to rotate. The connecting shaft 209 drives the partition plate 210 to rotate from the horizontal state to the vertical state.

[0063] The negative pressure device 204 is started, and an air negative pressure is generated in the collection bottle 202 through the first hollow tube 203. Through the action of the negative pressure, the first L-shaped tube 201 guides and attracts the blood with a higher concentration in the first drainage tube 105 and the second drainage tube 107. The blood in the second drainage tube 107 enters the first drainage tube 105 through the sterile connecting tube 108, enters the first hollow column 104 through the first drainage tube 105, and then enters the collection bottle 202 through the first hollow column 104 for collection. After the collection is completed, the rotating block 211 is turned, and the rotating block 211 drives the connecting shaft 209 and the partition plate 210 to rotate, and the partition plate 210 is rotated from the vertical state to the horizontal state to seal the blood with a higher concentration in the collection bottle 202.

[0064] Then, push the push block 217. The push block 217 drives the sliding rod 216 to slide, and the sliding rod 216 drives the piston block 215 to slide within the sliding groove 214. During the sliding process of the piston block 215, air can be pushed into the airbag 212 for inflation, causing the airbag 212 to expand outward and tightly seal between the partition plate 210 and the collection bottle 202. When the push block 217 is sliding, it also drives multiple thin rods 218 to slide. The multiple thin rods 218 drive the gear 219 and the first magnet 220 to slide, and slide the gear 219 into the tooth groove 222 on the fixed block 221 for engagement. Through the action of the second magnet 223, the first magnet 220 is attracted, thus completing the restriction on the rotating block 211 and the push block 217.

[0065] Then, add physiological saline into the storage bottle 208, start the centrifugal pump 206, and suck the physiological saline in the storage bottle 208, so that the physiological saline enters the second hollow column 106 through the second L-shaped tube 205, and then enters the second drainage tube 107, the sterile connecting tube 108 and the first drainage tube 105 through the second hollow column 106, to wash the residual blood attached to the second drainage tube 107 and the first drainage tube 105. The washed residual blood enters the first L-shaped tube 201 through the first hollow column 104, and then enters the collection bottle 202 through the first L-shaped tube 201 for collection, realizing the recovery of residual blood and avoiding the waste of blood resources. Through the flushing action of the physiological saline, it can ensure that the residual blood in the first drainage tube 105 and the second drainage tube 107 is thoroughly recovered and effectively utilized.

[0066] The present invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, procedures, components and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A residual blood recovery device during ECMO withdrawal, comprising an ECMO machine, characterized in that: The front end of the ECMO machine is fixedly connected with a first cannula and a second cannula, the first cannula is fixedly connected with a first hollow column, the first hollow column is fixedly connected with a first drainage tube, the second cannula is fixedly connected with a second hollow column, the second hollow column is fixedly connected with a second drainage tube, a same sterile connecting tube is arranged between the first drainage tube and the second drainage tube, the front end of the ECMO machine is fixedly connected with a support plate, the support plate is provided with a suction recovery component for suctioning the residual blood in the first drainage tube and the second drainage tube and a flushing component for flushing the residual blood in the first drainage tube and the second drainage tube, the suction recovery component is provided with a partition component and a sealing component for stratifying the residual blood, and the first hollow column and the second hollow column are provided with a connecting component for connecting the first cannula, the first drainage tube, the sterile connecting tube, the second drainage tube and the second cannula; The suction recovery assembly includes a first L-shaped tube, the first L-shaped tube is fixedly connected to the first hollow column, the top of the support plate is fixedly connected to a collecting bottle, one end of the first L-shaped tube is fixedly connected to the collecting bottle, the collecting bottle is fixedly connected to the first hollow tube, the top of the support plate is fixedly connected to a negative pressure device, and one end of the first hollow tube is fixedly connected to the negative pressure device; The flushing assembly includes a second L-shaped tube, the second L-shaped tube is fixedly connected to the second hollow column, the top of the support plate is fixedly connected to a centrifugal pump, one side of the centrifugal pump is fixedly connected to the second hollow tube, the top of the support plate is fixedly connected to a storage bottle, and one end of the second hollow tube is fixedly connected to the storage bottle; The partition assembly includes a connecting shaft, which is rotatably connected to the inner wall of the collecting bottle, a partition is fixedly connected to the outer surface of the connecting shaft, one end of the connecting shaft rotates through the collecting bottle, and one end of the connecting shaft is fixedly connected to a rotating block.

2. The residual blood recovery device for ECMO weaning according to claim 1, characterized in that: The sealing assembly includes an airbag, which is arranged on a partition. A mounting groove is provided on the outer surface of the partition. The airbag is fixedly connected inside the airbag. A sliding groove is provided in the middle of the connecting shaft. The airbag is connected to the sliding groove. A piston block is slidably connected to the inner wall of the sliding groove. A sliding rod is fixedly connected to one side of the piston block. The sliding rod slides through the rotating block, and one end of the sliding rod is fixedly connected to the push block.

3. The residual blood recovery device during ECMO weaning according to claim 2, characterized in that: Four thin rods are fixedly connected to one side of the push block close to the rotating block. The four thin rods are arranged in a circle. The four thin rods all slide through the rotating block. One end of the four thin rods is fixedly connected to the same gear. The gear is slidably connected to the outer surface of the connecting shaft. One side of the gear is fixedly connected to a first magnet. The outer surface of the collecting bottle is fixedly connected to a fixed block. The fixed block is provided with a tooth groove that cooperates with the gear. The inner wall of the tooth groove is fixedly connected to a second magnet.

4. The residual blood recovery device during ECMO weaning according to claim 3, characterized in that: The connecting component includes two rotating rods, which are respectively rotatably connected in the first hollow column and the second hollow column, and the outer surfaces of the rotating rods are fixedly connected with an arc plate. The two rotating rods are respectively rotatably passed through the upper ends of the first hollow column and the second hollow column, and the top ends of the rotating rods are fixedly connected with a knob.

5. The residual blood recovery device during ECMO weaning according to claim 4, characterized in that: The outer surfaces of the two rotating rods are fixedly connected with circular plates, and two bolts are threadedly connected to the circular plates. The first hollow column and the second hollow column are respectively provided with a plurality of threaded holes that cooperate with the bolts.

6. The residual blood recovery device during ECMO weaning according to claim 1, characterized in that: The ends of the first drainage tube and the second drainage tube that are close to each other are fixedly connected with hoses, the sterile connecting tube is installed between the two hoses, and the connection points between the two hoses and the sterile connecting tube are wrapped with medical tape.

7. The residual blood recovery device during ECMO weaning according to claim 2, characterized in that: The outer surface of the piston block is fixedly connected with a T-shaped sliding block, and the connecting shaft is provided with a T-shaped sliding groove which cooperates with the T-shaped sliding block.

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