CN201192486Y - Oxygenation Chamber Structure of Membrane Oxygenator - Google Patents

Abstract

The utility model relates to the technical field of medical appliance products, in particular to an oxygenation chamber structure of a membrane oxygenator. The upper part of the oxygenation chamber is provided with an oxygen inlet nozzle, a blood inlet and a circulating exhaust port, and the lower part of the oxygenation chamber is provided with an air outlet nozzle and a blood outlet. The oxygen inlet nozzle is communicated with the air outlet nozzle through a hollow fiber membrane tube, and the blood inlet, the circulating exhaust port and the blood outlet are communicated through gaps among the hollow fiber membrane tubes; oxygen entering from the oxygen inlet nozzle passes through the fiber membrane tube, blood entering from the blood inlet nozzle passes through the gap between the fiber membrane tubes and is oxygenated with the oxygen in the fiber membrane tube, and flows out from the blood outlet nozzle, and carbon dioxide gas discharged after oxygenation is discharged from the gas outlet nozzle. The advantage of adopting this kind of structure is that after the fibre membrane pipe breaks in the oxygenation chamber, gas leaks into in the blood, because gas is less than blood density, it will float upward, and the blood after the oxygenation is accomplished flows out from the hemorrhage mouth that is located below, has just so realized gas, blood separation.

Description

Oxygenation Chamber Structure of Membrane Oxygenator

Technical field:

The utility model relates to the technical field of medical equipment products, in particular to an oxygenation chamber structure of a membrane oxygenator.

Background technique:

Extracorporeal membrane oxygenation and as a medical technique are mainly used for cardiac surgery. This technology can completely replace the heart and lungs in the short term to perform open-heart surgery. Its principle is to draw the venous blood in the body out of the body, and inject it into the patient's arterial or venous system after being oxygenated by artificial cardiopulmonary bypass with special materials, so as to play a part of cardiopulmonary replacement and maintain the oxygenated blood supply of human organs and tissues.

An oxygenator is usually used in this technique. Its function is to synthesize oxygenated blood from non-oxygenated blood, also known as artificial lung. Oxygenators generally include membrane oxygenators and hollow fiber oxygenators. Among them, the membrane oxygenator is widely used because of its good compatibility, less plasma leakage, less damage to blood components, and suitable for long-term assistance.

Usually, the membrane oxygenator includes: a blood storage room with a storage function, an oxygenation room, and a variable temperature room with a blood temperature adjustment function. See the Chinese utility model patent specification with the patent number: 03262643.6, which discloses a "pump-driven extracorporeal oxygenation support therapy hollow fiber membrane oxygenator". There is an arterial blood inlet at the bottom, and an exhaust port on one side of the outer wall; there is an oxygenation chamber in the middle, which is equipped with double-layer braided and multi-layered "S"-shaped hollow fiber membrane tubes, and each layer of membrane tubes crosses each other at an acute angle. The membrane tubes and the membrane tubes of each layer are separated by monofilaments and braided wires to form a certain gap, blood flows outside the tubes, and air flows inside the tubes. There is a bleeding port on one side of the upper part of the oxygenation chamber, the upper part is an air inlet chamber, and an air inlet is arranged on one side of the outer wall.

The technical solution disclosed in the above utility model is a common oxygenator structure at present, but this structure has the following defects: in the process of oxygenation exchange, if the fiber membrane tube breaks, the gas in the fiber membrane tube will leak and mix into In the blood in the fibrous membranous tube space. This will cause the formation of blood bubbles in the blood, which must be processed later to prevent the patient from transfusing gas-laden blood.

Utility model content:

The technical problem to be solved by the utility model is to overcome the shortcomings of the current products and provide an oxygenation chamber structure of a membrane oxygenator that can prevent blood bubbles from occurring.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the oxygenation chamber includes a chamber and a hollow fiber membrane tube located in the chamber, and the upper part of the chamber is provided with an oxygen inlet nozzle, a blood inlet port, and a circular exhaust The lower part of the chamber is provided with an air outlet and a bleeding port; wherein, the oxygen inlet is connected to the air outlet through the hollow fiber membrane tube, and the blood inlet, the circulation exhaust port and the bleeding port are connected through the gap between the hollow fiber membrane tubes; The oxygen entering from the oxygen inlet passes through the fiber membrane tube, and the blood entering through the blood inlet passes through the gap between the fiber membrane tubes to oxygenate with the oxygen in the fiber membrane tube, and then flows out from the bleeding port. After oxygenation, the carbon dioxide gas is discharged from the The air outlet is discharged.

The chamber includes an upper air intake chamber, a middle exchange chamber, and a lower air outlet chamber. The fiber membrane tube is located in the exchange chamber, and its two ends are formed with sealing parts.

The oxygen inlet nozzle is arranged on the air inlet chamber; the air outlet nozzle is arranged on the air outlet chamber.

The blood inlet port, the circulation exhaust port and the outlet port are arranged on the exchange chamber.

After the utility model adopts the above-mentioned technical scheme, its blood flow direction is opposite to that of the current technology, that is, the blood enters from the blood inlet at the top and flows out from the bleeding port at the bottom, and a circulating exhaust gas is arranged on the upper part of the oxygenation chamber. mouth. The advantage of adopting this structure is that when the fibrous membrane tube ruptures, the gas leaks into the blood, and because the gas is less dense than blood, it will float up, and the oxygenated blood will flow out from the bleeding port below, so that The separation of Qi and blood is realized. The floating gas will be discharged through the circulation exhaust port, thus effectively avoiding the occurrence of blood bubbles.

Description of drawings:

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a perspective view of the utility model;

Fig. 2 is a sectional view of the utility model.

Detailed ways:

See Figures 1 and 2, the utility model includes: a chamber 1 and a hollow fiber membrane tube 5 located in the chamber 1 . The upper part of the chamber 1 is provided with an oxygen inlet nozzle 21 , a blood inlet port 31 , and a circulation exhaust port 4 , and the lower part of the chamber 1 is provided with an air outlet nozzle 22 and a bleeding port 32 . The chamber 1 includes: an air inlet chamber 11 at the upper part, an exchange chamber 12 at the middle part and an air outlet chamber 13 at the lower part. The fibrous membrane tube 5 is located in the exchange chamber 12 and has sealing parts 51 formed at its two ends to isolate the gas channel from the blood channel.

The oxygen inlet nozzle 21 is arranged on the air inlet chamber 11 ; the air outlet nozzle 22 is arranged on the air outlet chamber 13 . The blood inlet port 31 , the circulation exhaust port 4 and the blood outlet port 32 are arranged on the exchange chamber 12 . Wherein, the oxygen inlet nozzle 21 communicates with the air outlet nozzle 22 through the hollow fiber membrane tube 5 . The blood inlet port 31 , the circulation exhaust port 4 and the blood outlet port 32 communicate through the gap between the hollow fiber membrane tubes 5 . The oxygen entering from the oxygen inlet nozzle 21 passes through the fibrous membrane tube 5, and the blood entering through the blood inlet 31 passes through the gap between the fibrous membrane tubes 5 to oxygenate with the oxygen in the fibrous membrane tube, and flows out through the bleeding port 32. After oxygenation The discharged carbon dioxide gas is discharged through the outlet nozzle 22 .

See Fig. 2, when the utility model works, at first, oxygen enters in the intake chamber 11 by the oxygen inlet nozzle 21, and enters in the hollow fiber membrane tube 5. At the same time, venous blood enters the exchange chamber 12 from the blood inlet 31, and the blood passes through the gap between the fibrous membrane tubes 5 to be oxygenated with oxygen in the fibrous membrane tubes. Oxygenated blood will exit through the bleeding port 32 . The carbon dioxide discharged after oxygenation will enter the outlet chamber 13 and be discharged through the outlet nozzle 22 .

When the fibrous membrane tube 5 ruptures, the gas in the fibrous membrane tube 5 will leak into the blood, and because the gas is less dense than blood, it will float up, and the oxygenated blood will flow out from the bleeding port 32 located below. In this way, the separation of Qi and blood is realized. The floating gas will be discharged through the circulation exhaust port 4, thus effectively avoiding the occurrence of blood bubbles.

Of course, the above description is only an example of the utility model, and is not intended to limit the implementation scope of the utility model. All equivalent changes or modifications made according to the structure, features and principles described in the patent scope of the utility model shall be Included in the patent scope of the utility model application.

Claims (4)

1. The oxygenation chamber structure of a membrane oxygenator, comprising: a chamber (1) and a hollow fiber membrane tube (5) located in the chamber (1), characterized in that: the upper part of the chamber (1) is provided with Oxygen inlet nozzle (21), blood inlet port (31), circulation exhaust port (4), this chamber (1) bottom is provided with air outlet nozzle (22), bleeding outlet (32); Wherein, oxygen inlet nozzle (21 ) is communicated with the air outlet nozzle (22) through the hollow fiber membrane tube (5), and the blood inlet port (31), the circulation exhaust port (4) and the bleeding port (32) are communicated through the gap between the hollow fiber membrane tubes (5); The oxygen that enters from the oxygen inlet nozzle (21) passes through the fibrous membrane tube (5), and the blood that enters from the blood inlet (31) passes through the gap between the fibrous membrane tubes (5) to oxygenate with the oxygen in the fibrous membrane tube, and is passed through the fibrous membrane tube. The bleeding port (32) flows out, and the carbon dioxide gas discharged after oxygenation is discharged through the gas outlet (22). 2. The oxygenation chamber structure of a membrane oxygenator according to claim 1, characterized in that: said chamber (1) comprises an upper inlet chamber (11), an exchange chamber (12) in the middle ) and the air outlet chamber (13) at the bottom, the fiber membrane tube (5) is located in the exchange chamber (12), and its two ends are formed with sealing parts (51). 3. The oxygenation chamber structure of the membrane oxygenator according to claim 2, characterized in that: the oxygen inlet nozzle (21) is arranged on the air inlet chamber (11); the gas outlet nozzle (22 ) is arranged on the outlet chamber (13). 4. The oxygenation chamber structure of a membrane oxygenator according to claim 2, characterized in that: said blood inlet port (31), circulation exhaust port (4) and bleeding port (32) are arranged at the exchange Room (12).

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