Extracorporeal membrane oxygenator

Abstract

The utility model relates to an extracorporeal membrane oxygenator, which belongs to the field of medical instruments and comprises an oxygenation chamber, the oxygenation chamber comprises an inner shell and an outer shell, a hollow fiber semi-permeable membrane tube is arranged between the inner shell and the outer shell, the left end and the right end of the hollow fiber semi-permeable membrane tube are packaged through mucilage to form end sockets, and air chambers are arranged on the left side and the right side of the oxygenation chamber. Two air chambers are arranged in the inner shell, two air chambers are arranged in the inner shell, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, two air chambers are arranged in the two air chambers, and two air chambers are arranged in the two air chambers. When the blood inlet tube and the blood outlet tube are pulled out from the blood inlet and the blood outlet respectively after use, sealing of the blood inlet and the blood outlet is achieved through abutting of the duty device and the end cover, and leakage of residual blood is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to an extracorporeal membrane oxygenator and belongs to the field of medical instruments. BACKGROUND

[0002] The metabolism of the organs and tissues of the human body produces a large amount of carbon dioxide, and the respiratory organs of the human body, i.e. the lungs, oxygenate the venous blood into arterial blood and discharge carbon dioxide, so as to reduce the partial pressure of carbon dioxide. The normal value of the partial pressure of carbon dioxide in arterial blood is in the range of 35mmHg to 45mmHg, and the partial pressure of carbon dioxide exceeding 45mmHg is referred to as "high carbon dioxide partial pressure" or "increased carbon dioxide partial pressure", and insufficient ventilation is a possible cause of high carbon dioxide partial pressure, such as pulmonary failure, respiratory distress syndrome, etc. If the partial pressure of carbon dioxide in arterial blood is higher than 45mmHg, treatment may be needed to reduce the partial pressure of carbon dioxide, and an extracorporeal circulation carbon dioxide eliminator is usually used to provide respiratory support for patients with respiratory failure to achieve the purpose of oxygenating blood and discharging carbon dioxide.

[0003] The Chinese utility model patent with the publication number CN211132384U discloses an extracorporeal circulation carbon dioxide eliminator, which comprises an oxygenation chamber, gas chambers are arranged on the left and right sides of the oxygenation chamber, cup-shaped space holders are arranged in the gas chambers, an oxygenation chamber inlet and an oxygenation chamber outlet are arranged on the left and right sides of the inner shell respectively, the oxygenation chamber inlet and the oxygenation chamber outlet are connected with blood inlet channels or blood outlet channels respectively, blood inlets and blood outlets are arranged on the left and right end covers respectively, and exhaust ports and air inlet ports are arranged on the outer sides of the left and right gas chambers. The utility model is an extracorporeal circulation carbon dioxide eliminator, which achieves the purpose of oxygenating blood and discharging carbon dioxide through extracorporeal circulation, provides respiratory support for patients with respiratory failure, and effectively solves the problems existing in the prior art. However, in the prior art, when the carbon dioxide eliminator is used up, the blood pipeline connected with the blood inlets and the blood outlets needs to be pulled off, which easily causes the leakage of the residual blood in the carbon dioxide eliminator, resulting in environmental pollution.

[0004] Therefore, there is a need for an extracorporeal membrane oxygenator to avoid leakage of residual blood. SUMMARY

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an extracorporeal membrane oxygenator that avoids leakage of residual blood.

[0006] The utility model discloses a technical scheme that solves the above problems is adopted: a kind of extracorporeal membrane oxygenator, including oxygenation chamber, the oxygenation chamber includes inner shell and shell, hollow fiber semi-permeable membrane tube is arranged between the inner shell and shell, the left and right ends of hollow fiber semi-permeable membrane tube are encapsulated by cement paste and form end head, the left and right sides of oxygenation chamber are provided with air chamber, two air chambers are provided with space occupation device, the outer side of space occupation device is provided with end cap, two air chambers, two space occupation devices and two end caps form two passages one by one, two passages are blood inlet channel and blood outlet channel respectively, the left and right sides of inner shell are provided with oxygenation chamber inlet and oxygenation chamber outlet respectively, oxygenation chamber inlet and oxygenation chamber outlet are connected with blood inlet channel and blood outlet channel respectively, blood inlet and blood outlet are respectively provided on the left and right two end caps, the outer side of left and right two air chambers is provided with exhaust port and air inlet respectively, transmission mechanism is provided in the internal cavity of inner shell, two space occupation devices are connected with transmission mechanism, transmission mechanism is located between two space occupation devices, transmission mechanism controls two space occupation devices to move along left-right direction with the blood pressure that enters blood inlet as driving force, and the moving direction of two end caps is opposite.

[0007] Preferably, the hollow fiber semi-permeable membrane tube is made of polymethylpentene.

[0008] Preferably, the inner shell and the shell are made of polycarbonate.

[0009] Preferably, the transmission mechanism includes a transmission plate, a guide rod, and two transmission assemblies. The guide rod passes through the transmission plate and is slidably connected with the transmission plate. The guide rod is fixedly arranged on the inner shell. The transmission plate is connected with one end of the guide rod through a spring. The two transmission assemblies correspond to the two space occupation devices. The transmission plate is connected with the space occupation devices through the transmission assemblies.

[0010] Preferably, the guide rod is provided with two guide rods, which are distributed left and right.

[0011] Preferably, the transmission assembly includes a support sleeve, a connecting rod, and a transmission rod. The transmission rod is parallel to the left-right direction. One end of the transmission rod is fixedly arranged on the inner side wall of the space occupation device. The other end of the transmission rod is hingedly connected with the transmission plate through the connecting rod. The connecting rod is obliquely arranged. The support sleeve is parallel to the left-right direction. One end of the support sleeve is sealingly and fixedly arranged on the inner shell. The other end of the support sleeve is sleeved with the space occupation device. The space occupation device and the support sleeve are slidably and sealingly connected.

[0012] Preferably, the space occupation device is a circular cup shape.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses an extracorporeal membrane oxygenator, when using and completing and respectively pulling down from blood inlet and blood outlet with blood inlet and blood outlet, realize the sealing of blood inlet and blood outlet through the abutment of the space occupier and end cover, avoid the leakage of residual blood. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structure schematic diagram of the utility model a kind of extracorporeal membrane oxygenator initial state time;

[0016] Fig. 2 It is the structure schematic diagram of the utility model a kind of extracorporeal membrane oxygenator initial state time;

[0017] Fig. 3 It is the structure schematic diagram of the utility model a kind of extracorporeal membrane oxygenator initial state time;

[0018] Among them:

[0019] Oxygenation chamber 1, gas chamber 2, space occupier 3, end cover 4, blood inlet channel 5, blood outlet channel 6, oxygenation chamber inlet 7, oxygenation chamber outlet 8, blood inlet 9, blood outlet 10, exhaust port 11, gas inlet 12, transmission mechanism 13,

[0020] Inner shell 101, outer shell 102, hollow fiber semi-permeable membrane tube 103, head 104,

[0021] Transmission plate 131, guide rod 132, transmission assembly 133, spring 134

[0022] Support sleeve 1331, connecting rod 1332, transmission rod 1333. DETAILED DESCRIPTION

[0023] As Figs. 1-3As shown, the extracorporeal membrane oxygenator in the embodiment includes an oxygenation chamber 1, which comprises an inner shell 101 and an outer shell 102, and a hollow fiber semi-permeable membrane tube 103 arranged between the inner shell 101 and the outer shell 102. The left and right ends of the hollow fiber semi-permeable membrane tube 103 are sealed by a sealing head 4 formed by sealing paste. The oxygenation chamber 1 is provided with an air chamber 2 on each of the left and right sides. Each air chamber 2 is provided with a circular cup-shaped space holder 3. An end cover 4 is arranged on the outer side of the space holder 3. Two air chambers 2, two space holders 3 and two end covers 4 form two channels in a one-to-one correspondence. The two channels are respectively a blood inlet channel 5 and a blood outlet channel 6. The inner shell 101 is provided with an oxygenation chamber inlet 7 and an oxygenation chamber outlet 8 on each of the left and right sides. The oxygenation chamber inlet 7 and the oxygenation chamber outlet 8 are respectively connected to the blood inlet channel 5 and the blood outlet channel 6. The left and right end covers 4 are respectively provided with a blood inlet port 9 and a blood outlet port 10. The left and right air chambers 2 are respectively provided with an exhaust port 11 and an air inlet port 12. A transmission mechanism 13 is arranged in the internal cavity of the inner shell 101. The two space holders 3 are connected to the transmission mechanism 13. The transmission mechanism 13 is located between the two space holders 3. The transmission mechanism 13 controls the movement of the two space holders 3 in the left-right direction by taking the blood pressure entering the blood inlet port 9 as the driving force. The moving directions of the two end covers 4 are opposite.

[0024] In clinical use, the blood inlet port 9 is connected to a blood inlet tube, and the blood outlet port 10 is connected to a blood outlet tube. The venous blood of a patient enters the oxygenation chamber 1 in sequence through the blood inlet tube, the blood inlet port 9, the blood inlet channel 5 and the oxygenation chamber inlet 7. The blood travels outside the hollow fiber semi-permeable membrane tube 103. The oxygen entering through the air inlet port 12 enters the inner hole of the hollow fiber semi-permeable membrane tube 103 through the air chamber 2 and exchanges with the blood in the oxygenation chamber 1. The carbon dioxide discharged after the oxygen combines with the blood is discharged through the exhaust port 11. The oxygenated blood enters the blood system of the patient in sequence through the oxygenation chamber outlet 8, the blood outlet channel 6, the blood outlet port 10 and the blood outlet tube. Thus, the extracorporeal membrane oxygenation support therapy circulation process is completed, which replaces the function of the lungs and supports the life of the patient. In the initial state, the space holder 3 abuts against the end cover 4, that is, the two space holders 3 respectively seal the blood inlet port 9 and the blood outlet port 10. In the working state, the blood enters the blood inlet port 9 and pushes the left space holder 3 to move rightward and separate from the end cover 4 under the action of pressure, that is, the blood inlet port 9 is opened. The movement of the left space holder 3 drives the right space holder 3 to move leftward and separate from the end cover 4 through the transmission mechanism 13, that is, the blood outlet port 10 is opened. When the blood inlet port 9 stops delivering blood, the two space holders 3 are driven to reset through the transmission mechanism 13, that is, the space holder 3 abuts against the end cover 4. The two space holders 3 respectively seal the blood inlet port 9 and the blood outlet port 10. Thus, when the blood inlet tube and the blood outlet tube are pulled off from the blood inlet port 9 and the blood outlet port 10 respectively, the leakage of residual blood is avoided.

[0025] The material of the hollow fiber semi-permeable membrane tube 103 is polymethylpentene.

[0026] The material of the inner shell 101 and the outer shell 102 is polycarbonate;

[0027] The transmission mechanism 13 comprises a transmission plate 131, a guide rod 132 and two transmission assemblies 133, the guide rod 132 passes through the transmission plate 131, the guide rod 132 is in sliding connection with the transmission plate 131, the guide rod 132 is fixedly arranged on the inner shell 101, the transmission plate 131 is connected with one end of the guide rod 132 through a spring 134, the guide rod 132 is provided with two, the two guide rods 132 are distributed on the left and right sides, the two transmission assemblies 133 correspond to the two space occupiers 3 one by one, the transmission plate 131 is connected with the space occupier 3 through the transmission assembly 133, in the moving process of the left space occupier 3 to the right, the transmission plate 131 is driven to move on the guide rod 132 through one of the transmission assemblies 133, and the spring 134 is deformed, the movement of the transmission plate 131 drives the right space occupier 3 to move to the left through the other transmission assembly 133;

[0028] The transmission assembly 133 comprises a support sleeve 1331, a connecting rod 1332 and a transmission rod 1333, the transmission rod 1333 is parallel to the left-right direction, one end of the transmission rod 1333 is fixedly arranged on the inner side wall of the space occupier 3, the other end of the transmission rod 1333 is hinged with the transmission plate 131 through the connecting rod 1332, the connecting rod 1332 is arranged obliquely, the support sleeve 1331 is parallel to the left-right direction, one end of the support sleeve 1331 is sealingly and fixedly arranged on the inner shell 101, the other end of the support sleeve 1331 is sleeved with the space occupier 3, the space occupier 3 is in sliding and sealing connection with the support sleeve 1331, when the left space occupier 3 moves to the right, the space occupier 3 moves relatively with the support sleeve 1331, and the movement of the left space occupier 3 drives the transmission rod 1333 to move synchronously, the movement of the transmission rod 1333 drives the transmission plate 131 to move on the guide rod 132 through the connecting rod 1332, and the movement of the transmission plate 131 also drives the right space occupier 3 to move to the left through the connecting rod 1332 and the transmission rod 1333, when the transmission plate 131 is reset through the elastic action of the spring 134, the reset of the transmission plate 131 drives the space occupier 3 to reset through the connecting rod 1332 and the transmission rod 1333;

[0029] As described above, when the extracorporeal membrane oxygenator is used and the blood inlet tube and the blood outlet tube are pulled off from the blood inlet 9 and the blood outlet 10 respectively, the blood inlet 9 and the blood outlet 10 are sealed through the abutting of the space occupier 3 and the end cover 4, so that the leakage of residual blood is avoided.

[0030] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and the technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. An extracorporeal membrane oxygenator, comprising an oxygenation chamber (1), the oxygenation chamber (1) comprising an inner shell (101) and an outer shell (102), a hollow fiber semi-permeable membrane tube (103) being arranged between the inner shell (101) and the outer shell (102), the hollow fiber semi-permeable membrane tube (103) being encapsulated by a paste to form a head (104) at both ends, both sides of the oxygenation chamber (1) being provided with an air chamber (2), an air chamber (2) being provided with an air chamber (2) inside, an air chamber (3) being provided outside the air chamber (3), two air chambers (2), two air chambers (3) and two air chambers (4) corresponding to each other to form two channels, two channels being respectively a blood inlet channel (5) and a blood outlet channel (6), the inner shell (101) being provided with an oxygenation chamber inlet (7) and an oxygenation chamber outlet (8) on both sides, the oxygenation chamber inlet (7) and the oxygenation chamber outlet (8) being respectively connected with the blood inlet channel (5) and the blood outlet channel (6), the left and right two end covers (4) being respectively provided with a blood inlet (9) and a blood outlet (10), the left and right two air chambers (2) being respectively provided with an exhaust port (11) and an air inlet (12), characterized in that: The inner cavity of the inner shell (101) is provided with a transmission mechanism (13), two space occupying devices (3) are connected with the transmission mechanism (13), the transmission mechanism (13) is located between the two space occupying devices (3), the transmission mechanism (13) controls the two space occupying devices (3) to move along the left-right direction by taking the blood pressure entering the blood inlet (9) as the driving force, and the moving directions of the two end covers (4) are opposite.

2. The extracorporeal membrane oxygenator of claim 1, wherein: The material of the hollow fiber semi-permeable membrane tube (103) is polymethylpentene.

3. The extracorporeal membrane oxygenator of claim 1, wherein: The materials of the inner shell (101) and the outer shell (102) are both polycarbonate.

4. The extracorporeal membrane oxygenator of claim 1, wherein: The transmission mechanism (13) comprises a transmission plate (131), a guide rod (132) and two transmission assemblies (133), the guide rod (132) penetrates through the transmission plate (131), the guide rod (132) is in sliding connection with the transmission plate (131), the guide rod (132) is fixedly arranged on the inner shell (101), one end of the guide rod (132) is connected with the transmission plate (131) through a spring (134), the two transmission assemblies (133) correspond to the two space occupying devices (3) one by one, and the transmission plate (131) is connected with the space occupying device (3) through the transmission assembly (133).

5. The extracorporeal membrane oxygenator of claim 4, wherein: The guide rod (132) is provided with two guide rods (132) which are distributed left and right.

6. The extracorporeal membrane oxygenator of claim 4, wherein: The transmission assembly (133) comprises a support sleeve (1331), a connecting rod (1332) and a transmission rod (1333), the transmission rod (1333) is parallel to the left-right direction, one end of the transmission rod (1333) is fixedly arranged on the inner side wall of the space occupying device (3), the other end of the transmission rod (1333) is hinged with the transmission plate (131) through the connecting rod (1332), the connecting rod (1332) is arranged obliquely, the support sleeve (1331) is parallel to the left-right direction, one end of the support sleeve (1331) is sealingly and fixedly arranged on the inner shell (101), the space occupying device (3) is sleeved with the other end of the support sleeve (1331), and the space occupying device (3) is in sliding and sealing connection with the support sleeve (1331).

7. The extracorporeal membrane oxygenator of claim 1, wherein: The space occupying device (3) is a circular cup shape.

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