Excess blood recovery equipment during ECMO machine withdrawal

Abstract

The invention provides residual blood recovery equipment during ECMO machine withdrawal, and belongs to the field of medical instruments. Comprising an ECMO machine, the front end of the ECMO machine is fixedly connected with a first insertion tube and a second insertion tube, the first insertion tube is fixedly connected with a first hollow column, the first hollow column is fixedly connected with a first drainage tube, the second insertion tube is fixedly connected with a second hollow column, the second hollow column is fixedly connected with a second drainage tube, and the second drainage tube is fixedly connected with a second drainage tube. The high-concentration blood in the second drainage tube and the first drainage tube is sucked and collected through the suction and recovery assembly, recovery and reuse of blood resources are improved, the collected blood is sealed and isolated through the separation assembly and the sealing assembly, the first drainage tube and the second drainage tube are communicated through the communication assembly, and the collection efficiency of the blood resources is improved. The residual blood in the second drainage tube and the first drainage tube is flushed through the flushing assembly, the residual blood in the second drainage tube and the first drainage tube is flushed into the collecting bottle, and it is ensured that the residual blood is thoroughly recycled and effectively utilized.

Description

Technical Field

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

[0002] ECMO is an advanced extracorporeal life support technology that uses a centrifugal pump and an oxygenator to draw the patient's venous blood out of the body, oxygenate it, and then return it to the body, thereby providing temporary support for the heart or lungs. ECMO equipment is mainly composed of a centrifugal pump, an oxygenator, a pipeline, a cannula, etc. Its working principle is that the centrifugal pump draws out the venous blood, exchanges gases through the oxygenator, and then returns the oxygen-rich blood to the patient's body.

[0003] During the removal process of the existing ECMO, a certain amount of residual blood will remain in the ECMO pipeline and cannot be recovered in time. If this blood is not properly handled, it will not only cause a waste of blood resources, but also during the recovery process, some of the blood may be exposed to the air and easily contaminated. Summary of the invention

[0004] In view of the problem in the prior art that a certain amount of residual blood may remain in the ECMO pipeline and cannot be recovered in time, if the blood is not properly handled, it will not only cause a waste of blood resources, but also part of the blood may be exposed to the air and easily contaminated during the recovery process. The purpose of the present invention is to provide a residual blood recovery device for ECMO withdrawal.

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

[0006] A device for recovering residual blood during ECMO withdrawal comprises an ECMO machine, wherein 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, a first drainage tube is fixedly connected to the first hollow column, a second cannula is fixedly connected to the second hollow column, a second drainage tube is fixedly connected to the second hollow column, a same sterile connecting tube is arranged between the first drainage tube and the second drainage tube, a supporting plate is fixedly connected to the front end of the ECMO machine, a suction and recovery component for suctioning residual blood in the first drainage tube and the second drainage tube and a flushing component for flushing residual blood in the first drainage tube and the second drainage tube are arranged on the supporting plate, a partitioning component and a sealing component for stratifying residual blood are arranged on the suction and recovery component, and a connecting component for connecting the first cannula, the first drainage tube, the sterile connecting tube, the second drainage tube and the second cannula is arranged on the first hollow column and the second hollow column.

[0007] Optionally, the suction recovery assembly includes a first L-shaped tube, which is fixedly connected to a 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.

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

[0009] Optionally, 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.

[0010] Optionally, 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.

[0011] Optionally, 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, and the inner wall of the tooth groove is fixedly connected to a second magnet.

[0012] Optionally, the connecting component includes two rotating rods, which are rotatably connected in the first hollow column and the second hollow column respectively, and the outer surfaces of the rotating rods are fixedly connected with an arc plate. The two rotating rods are rotatably passed through the upper ends of the first hollow column and the second hollow column respectively, and the top ends of the rotating rods are fixedly connected with a knob.

[0013] Optionally, the outer surfaces of the two rotating rods are fixedly connected with a circular plate, and two bolts are threadedly connected to the circular plate. The first hollow column and the second hollow column are respectively provided with a plurality of threaded holes that cooperate with the bolts.

[0014] Optionally, 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 sterile connecting tubes, and the connections between the two hoses and the sterile connecting tubes are wrapped with medical tape.

[0015] Optionally, a T-shaped sliding block is fixedly connected to the outer surface of the piston block, and a T-shaped sliding groove cooperating with the T-shaped sliding block is provided on the connecting shaft.

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

[0017] In the above scheme, when the ECMO machine is withdrawn 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 through a sterile connecting tube to form a closed loop to prevent outside air or pollutants from entering the residual blood during the recovery process. The first drainage tube is connected to the first L-shaped tube through a connecting component, and then, the blood with a higher concentration in the second drainage tube and the first drainage tube is attracted and collected through the suction recovery component, so as to improve the recovery and reuse of blood resources and reduce the waste of blood. The collected blood is sealed and isolated through the partition component and the sealing component to prevent blood from flowing out. Then, the first drainage tube is connected to the second drainage tube through the connecting 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 to recover 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 it is necessary to recover the residual blood in the first drainage tube and the second drainage tube, the negative pressure device is started, and negative air pressure is generated in the collecting bottle through the first hollow tube. Through the effect of negative pressure, the first L-shaped tube guides and attracts 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 collecting bottle through the first hollow column for collection. Blood with a higher concentration can be recovered, and the collected residual blood also has a higher red blood cell concentration and oxygen carrying capacity, so that blood resources can be recovered and reused, thereby reducing blood waste, improving the quality of recovered blood and the utilization rate of blood resources, and avoiding the risk of contamination and infection caused by exposure of blood to air.

[0019] When it is necessary to flush the second drainage tube and the residual blood in the second drainage tube, physiological saline is added into the storage bottle, and then the centrifugal pump is started 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, so as to flush the residual blood attached to the second drainage tube and the first drainage tube, and the flushed residual blood enters the first L-shaped tube through the first hollow column, and then enters the collecting bottle through the first L-shaped tube for collection, so as to realize the recovery of the residual blood and avoid the waste of blood resources. Through the flushing effect of the physiological saline, it can be ensured that the residual blood in the first drainage tube and the second drainage tube is completely recovered and effectively utilized.

[0020] When it is necessary to separate the blood with higher concentration from the residual blood flushed with saline, the rotary block is turned, and the rotary block drives the connecting shaft to rotate, and the connecting shaft drives the partition to rotate from a horizontal state to a vertical state, so that the blood with higher concentration can enter the collection bottle for collection. After the collection is completed, the rotary block is turned again, and the rotary block drives the connecting shaft and the partition to rotate, and the partition is rotated from a vertical state to a horizontal state to seal the blood with higher concentration in the collection bottle. When the residual blood flushed with saline enters the collection bottle, the blood with higher concentration and the residual blood flushed with saline can be collected in layers through the action of the partition, which is convenient for blood recovery and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

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

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

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

[0025] Figure 4 It is a schematic diagram of the left side cross-sectional structure of the collecting bottle of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation slot structure of the present invention;

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

[0028] Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram of the structure;

[0029] Figure 8 It is a schematic diagram of the structure of the sealing assembly of the present invention;

[0030] Fig. 9 It is a schematic diagram of the gear, fixed block and tooth groove structure of the present invention;

[0031] Fig.10 It is a schematic diagram of the structure of the connected components of the present invention;

[0032] Fig.11 It is a schematic diagram of the bolt and threaded hole structure of the present invention.

[0033] [Reference Signs]

[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, 1. Rotary block; 212. Air bag; 213. Mounting groove; 214. Sliding groove; 215. Piston block; 216. Sliding rod; 217. Push 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 slide groove.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0036] The following is a detailed description of a residual blood recovery device for ECMO withdrawal provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0037] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0038] In general, a term can be understood, at least in part, from its 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 the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0040] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0041] like Figures 1 to 11As shown, an embodiment of the present invention provides a residual blood recovery device during ECMO weaning, 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, a first drainage tube 105 is fixedly connected to the first hollow column 104, a second cannula 103 is fixedly connected to a second hollow column 106, a second drainage tube 107 is fixedly connected to the second hollow column 106, a same sterile connecting tube 108 is arranged between the first drainage tube 105 and the second drainage tube 107, and the ECMO machine 101 is fixedly connected to the front end of the ECMO machine 101, a first cannula 102 is fixedly connected to the first hollow column 104, a first drainage tube 105 is fixedly connected to the first hollow column 104, a second drainage tube 107 is fixedly connected to the second hollow column 106, and a same sterile connecting tube 108 is arranged between the first drainage tube 105 and the second drainage tube 107. The front end of the O machine 101 is fixedly connected to a support plate 109, on which a suction recovery component for suctioning the residual blood in the first drainage tube 105 and the second drainage tube 107 and a flushing component for flushing the residual blood in the first drainage tube 105 and the second drainage tube 107 are provided, and a partition component and a sealing component for stratifying the residual blood are provided on the suction recovery component, and a connecting component for connecting the first cannula 102, the first drainage tube 105, the sterile connecting tube 108, the second drainage tube 107 and the second cannula 103 are provided on the first hollow column 104 and the second hollow column 106.

[0042] When the ECMO machine 101 is removed, if it is necessary to recover the remaining blood in the first drainage tube 105 and the second drainage tube 107, 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 to prevent the outside air or pollutants from entering during the recovery of the remaining blood. The first drainage tube 105 is connected to the first L-shaped tube 201 through the connecting component, and then the blood with a higher concentration in the second drainage tube 107 and the first drainage tube 105 is sucked out through the suction recovery component. The method can collect and recover blood, improve the recovery and reuse of blood resources, and reduce the waste of blood. The collected blood is sealed and isolated by the partition component and the sealing component to prevent blood from flowing out. Then, the first drainage tube 105 is connected with the second drainage tube 107 by the connecting component, and the remaining blood in the second drainage tube 107 and the first drainage tube 105 is flushed by the flushing component, and the remaining blood in the second drainage tube 107 and the first drainage tube 105 is flushed into the collecting bottle 202 to recover the remaining blood, so as to ensure that the remaining blood in the first drainage tube 105 and the second drainage tube 107 is completely recovered and effectively utilized.

[0043] like Figure 2 and Figure 3As shown, the suction recovery component includes a first L-shaped tube 201, which is fixedly connected to the first hollow column 104, the top of the support plate 109 is fixedly connected to a collecting bottle 202, one end of the first L-shaped tube 201 is fixedly connected to the collecting bottle 202, the collecting bottle 202 is fixedly connected to a first hollow tube 203, the top of the support plate 109 is fixedly connected to 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 residual blood in the first drainage tube 105 and the second drainage tube 107, the negative pressure device 204 is started, and the air negative pressure is generated in the collection bottle 202 through the first hollow tube 203. Through the effect of the negative pressure, the first L-shaped tube 201 guides and attracts the residual blood in the first drainage tube 105 and the second drainage tube 107. The residual 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 first hollow column 104 through the first hollow column 104. 04 enters the collection bottle 202 for collection, and can recover blood with a higher concentration. The collected residual blood also has a higher red blood cell concentration and oxygen carrying capacity, so that blood resources can be recovered and reused, thereby reducing blood waste, improving the quality of recovered blood and the utilization rate of blood resources, and avoiding the risk of contamination and infection caused by exposure of blood to the air. The residual blood is flushed into the collection bottle 202 and recovered, 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.

[0045] like Figure 2 and Figure 3 As shown, the flushing assembly includes a second L-shaped tube 205, which is fixedly connected to the second hollow column 106. The top of the support plate 109 is fixedly connected to a centrifugal pump 206, one side of the centrifugal pump 206 is fixedly connected to a second hollow tube 207, the top of the support plate 109 is fixedly connected to 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 residual blood in the second drainage tube 107, physiological saline is added into the storage bottle 208, and then the centrifugal pump 206 is started 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, and the residual blood attached to the second drainage tube 107 and the first drainage tube 105 is flushed. The flushed residual blood enters the first L-shaped tube 201 through the first hollow column 104, and then enters the collecting bottle 202 through the first L-shaped tube 201 for collection, so as to realize the recovery of residual blood and avoid the waste of blood resources. Through the flushing effect of physiological saline, it can be ensured that the residual blood in the first drainage tube 105 and the second drainage tube 107 is completely recovered and effectively utilized.

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

[0048] When it is necessary to separate the blood with higher concentration from the residual blood after flushing with saline, the rotary block 211 is turned, and the rotary block 211 drives the connecting shaft 209 to rotate, and the connecting shaft 209 drives the partition 210 to rotate from a horizontal state to a vertical state, so that the blood with higher concentration can enter the collecting bottle 202 for collection. After the collection is completed, the rotary block 211 is turned again, and the rotary block 211 drives the connecting shaft 209 and the partition 210 to rotate, and the partition 210 is rotated from a vertical state to a horizontal state, so that the blood with higher concentration in the collecting bottle 202 is sealed. When the residual blood after flushing with saline enters the collecting bottle 202, the partition 210 can be used to make the blood with higher concentration and the residual blood after flushing with saline collected in layers, so as to facilitate the recovery and reuse of blood.

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

[0050] When it is necessary to tightly seal the partition 210 and the collection bottle 202, when the partition 210 rotates to a horizontal state, the push block 217 is pushed, and the push block 217 drives the slide rod 216 to slide, and the slide rod 216 drives the piston block 215 to slide in the sliding groove 214. During the sliding process, the piston block 215 can push air into the airbag 212 for inflation, so that the airbag 212 expands outward, and the partition 210 and the collection bottle 202 are tightly sealed to avoid mixing of high-concentration blood with residual blood flushed with saline, thereby improving the quality of ensuring the recovery of blood.

[0051] like Fig. 9 As shown, the push block 217 is fixedly connected to one side of the rotary block 211 with four thin rods 218, the four thin rods 218 are arranged in a circle, and the four thin rods 218 all slide through the rotary block 211, and one end of the four thin rods 218 is fixedly connected to the same gear 219, and the gear 219 is slidably connected to the outer surface of the connecting shaft 209, and one side of the gear 219 is fixedly connected to the first magnet 220, and the outer surface of the collecting bottle 202 is fixedly connected to a fixed block 221, and the fixed block 221 is provided with a tooth groove 222 that cooperates with the gear 219, and the inner wall of the tooth groove 222 is fixedly connected to the second magnet 223.

[0052] When it is necessary to lock the rotating block 211 and the pushing block 217 at the same time, when the pushing block 217 slides, it also drives the multiple thin rods 218 to slide, and the multiple thin rods 218 drive the gear 219 and the first magnet 220 to slide, and the gear 219 is slid into the tooth groove 222 on the fixed block 221 for engagement, and the first magnet 220 is attracted by the action of the second magnet 223, thereby completing the restriction of the rotating block 211 and the pushing block 217, and preventing the rotating block 211 and the pushing block 217 from rotating at will when the device is recovering the residual blood, thereby affecting the recovery effect of the residual blood.

[0053] like Fig.10 As shown, the connecting component includes two rotating rods 224, and the two rotating rods 224 are respectively rotatably connected in the first hollow column 104 and the second hollow column 106, and the outer surface of the rotating rod 224 is fixedly connected with an arc plate 225. The two rotating rods 224 are respectively rotatably passed through the upper ends of the first hollow column 104 and the second hollow column 106, and the top of the rotating rod 224 is fixedly connected with a knob 226.

[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 plate 225 to rotate. When the arc surface of the arc plate 225 is rotated to the tube mouth of the first cannula 102, the arc plate 225 can seal the first cannula 102, so that the remaining blood in the second drainage tube 107 and the first drainage tube 105 can pass through the first hollow column 104 and the first L-shaped tube 201 into the collecting bottle 202 for recovery. When the arc surface of the arc plate 225 is rotated to the tube mouth of one of the pipelines, the arc plate 225 seals the corresponding tube mouth, so that the other two pipelines are connected.

[0055] like Fig.11 As shown, the outer surfaces of the two rotating rods 224 are fixedly connected with a circular plate 227, and two bolts 228 are threadedly connected to the circular plate 227. The first hollow column 104 and the second hollow column 106 are respectively provided with a plurality of threaded holes 229 that cooperate with the bolts 228.

[0056] When it is necessary to limit the knob 226, turn the bolt 228 to screw the bolt 228 out of the threaded hole 229, and then turn the knob 226. The knob 226 drives the rotating rod 224 and the circular plate 227 to rotate to connect the pipeline. After the connection is completed, turn the bolt 228 to screw the bolt 228 into the threaded hole 229 to limit the knob 226 to prevent the knob 226 from rotating at will during the recovery process of the residual blood, thereby affecting the recovery of the residual blood.

[0057] like Figure 2 As shown, the ends of the first drainage tube 105 and the second drainage tube 107 close to each other are fixedly connected with a hose 230, the sterile connecting tube 108 is installed between the two sterile connecting tubes 108, and the connection between the two hoses 230 and the sterile connecting tubes 108 is wrapped with medical tape 231.

[0058] By providing a hose 230 and a medical tape 231, the sterile connecting tube 108 is installed in the two hoses 230, and the medical tape 231 is wrapped around the connection between the hose 230 and the sterile connecting tube 108 to seal the sterile connecting tube 108 and the hose 230 to prevent outside air or contaminants from entering during the recovery process of the residual blood. The medical tape 231 can also prevent the sterile connecting tube 108 from falling off.

[0059] like Figure 8 As shown, a T-shaped sliding block 232 is fixedly connected to the outer surface of the piston block 215 , and a T-shaped sliding groove 233 cooperating with the T-shaped sliding block 232 is formed on the connecting shaft 209 .

[0060] By providing a T-shaped slider 232 and a T-shaped slot 233, when the piston block 215 is sliding, the piston block 215 also drives the T-shaped slider 232 to slide in the T-shaped slot 233. The T-shaped slot 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 workflow provided by the present invention is as follows:

[0062] During use, when the ECMO machine 101 needs to be removed, the first drainage tube 105 and the second drainage tube 107 are cut off, and the sterile connecting tube 108 is connected through 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, and then the medical tape 231 is wrapped around the connection between the hose 230 and the sterile connecting tube 108 to seal the sterile connecting tube 108 and the hose 230 to prevent the outside air or contaminants from entering during the recovery of the residual blood, and then the bolt 228 on the second hollow column 106 is screwed and the bolt 228 is inserted into the threaded hole 229. Unscrew it, and then turn the knob 226 on the second hollow column 106, the knob 226 drives the rotating rod 224 to rotate, and the rotating rod 224 drives the arc plate 225 to rotate. When the arc surface of the arc plate 225 is rotated to the tube mouth of the second L-shaped tube 205, the second L-shaped tube 205 is sealed to avoid drainage of residual blood, and the saline in the storage bottle 208 is extracted, and the bolt 228 is turned, and the bolt 228 is screwed into the threaded hole 229 to limit the knob 226, and then the rotary block 211 is turned, the rotary block 211 drives the connecting shaft 209 to rotate, and the connecting shaft 209 drives the partition 210 to rotate from a horizontal state to a vertical state.

[0063] Start the negative pressure device 204, and generate negative air pressure in the collecting bottle 202 through the first hollow tube 203. Through the effect of negative pressure, the first L-shaped tube 201 guides and attracts the blood with 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 collecting bottle 202 through the first hollow column 104 for collection. After the collection is completed, turn the rotary block 211, and the rotary block 211 drives the connecting shaft 209 and the partition 210 to rotate, and rotates the partition 210 from a vertical state to a horizontal state, so as to seal the blood with higher concentration in the collecting bottle 202.

[0064] Then, push the push block 217, which drives the slide bar 216 to slide, and the slide bar 216 drives the piston block 215 to slide in the sliding groove 214. During the sliding process, the piston block 215 can push air into the airbag 212 for inflation, so that the airbag 212 expands outward, and tightly seals the partition 210 and the collection bottle 202. When the push block 217 is sliding, it also drives multiple thin rods 218 to slide, and 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, and 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.

[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, so as to flush the residual blood attached to the second drainage tube 107 and the first drainage tube 105, and the flushed residual blood enters the first L-shaped tube 201 through the first hollow column 104, and then enters the collecting bottle 202 through the first L-shaped tube 201 for collection, so as to realize the recovery of residual blood and avoid the waste of blood resources. Through the flushing effect of physiological saline, it can be ensured that the residual blood in the first drainage tube 105 and the second drainage tube 107 is completely recovered and effectively utilized.

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

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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, and 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.

2. The residual blood recovery device for ECMO weaning according to claim 1, characterized in that: The suction recovery assembly includes a first L-shaped tube, which is fixedly connected to a 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.

3. The residual blood recovery device during ECMO weaning according to claim 2, characterized in that: The flushing assembly includes a second L-shaped tube, which 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.

4. The residual blood recovery device during ECMO weaning according to claim 3, characterized in that: 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.

5. The residual blood recovery device during ECMO weaning according to claim 4, 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.

6. The residual blood recovery device during ECMO weaning according to claim 5, 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.

7. The residual blood recovery device during ECMO weaning according to claim 6, 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.

8. The residual blood recovery device for ECMO weaning according to claim 7, 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.

9. 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 sterile connecting tubes, and the connection points between the two hoses and the sterile connecting tubes are wrapped with medical tapes.

10. The residual blood recovery device during ECMO weaning according to claim 5, 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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