A low-capacity self-exhaust blood temperature changer

Abstract

The present invention discloses a low-capacity self-exhaust blood thermostat, wherein the outer shell comprises a liquid outlet chamber, a cooling chamber, and a liquid inlet chamber which are sequentially separated and arranged from top to bottom; the bottom surface of the liquid inlet chamber is provided with a liquid inlet, and the top surface of the liquid outlet chamber is provided with a liquid outlet; a plurality of hollow fibers are arranged in the cooling chamber, the hollow fibers are arranged vertically, the top end of the hollow fibers are connected to the liquid outlet chamber, and the bottom end of the hollow fibers is connected to the liquid inlet chamber, a blood inlet is arranged at the top of the cooling chamber, a blood outlet is arranged at the bottom of the cooling chamber, the blood inlet and the blood outlet are arranged at opposite sides of the cooling chamber, a first bubble catcher is arranged at the blood inlet, and a second bubble catcher is arranged at the blood outlet, the cross-sectional area of ​​the first bubble catcher gradually increases from upstream to downstream, and a first exhaust port is arranged at the top of the first bubble catcher. The present invention has a bubble dredging function, convenient exhaust, high heat exchange efficiency, small size, and convenient use.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a low-capacity self-exhaust blood temperature changer. Background Art

[0002] In the technology of perfusion of cardiac protective solution, it is usually necessary to change the temperature of blood. There are two main methods of changing the temperature in the prior art:

[0003] The first is the method of pressurized infusion of precooled crystalloid cardioplegia, which cannot meet the needs of oxygenated blood heart protection solution perfusion;

[0004] The second method is to use a coil device that enters ice water for heat exchange. Its perfusion pipeline is long and the flow resistance is large, which is inconvenient for clinical use.

[0005] When perfusing infants and young children, due to their small blood volume, the pre-charge volume of current thermostats is relatively large, which will increase the pre-charge volume, causing blood dilution and blood waste. Summary of the invention

[0006] The present invention aims to provide a low-capacity self-exhaust blood temperature changer, which has a bubble diversion function, convenient exhaust, high heat exchange efficiency, small size and convenient use.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] The present invention discloses a low-capacity self-exhaust blood temperature changer, comprising a housing, wherein the housing comprises a liquid outlet chamber, a cooling chamber, and a liquid inlet chamber which are sequentially separated and arranged from top to bottom;

[0009] The bottom surface of the liquid inlet chamber is provided with a liquid inlet, and the top surface of the liquid outlet chamber is provided with a liquid outlet;

[0010] A plurality of hollow fibers are arranged in a vertical manner in the cooling chamber, the top of the hollow fibers are connected to the liquid outlet chamber, the bottom of the hollow fibers are connected to the liquid inlet chamber, a blood inlet is arranged at the top of the cooling chamber, a blood outlet is arranged at the bottom of the cooling chamber, the blood inlet and the blood outlet are arranged on opposite sides of the cooling chamber, a first bubble catcher is arranged at the blood inlet, and a second bubble catcher is arranged at the blood outlet.

[0011] The cross-sectional area of ​​the first bubble trap gradually increases from upstream to downstream, and a first exhaust port is arranged on the top of the first bubble trap.

[0012] Preferably, the bottom height of the blood inlet is ≥ the bottom height of the outlet end of the first bubble trap.

[0013] Preferably, the cross-sectional area of ​​the second bubble trap gradually decreases from upstream to downstream, and a second exhaust port is provided on the top of the second bubble trap.

[0014] Preferably, the first exhaust port and the second exhaust port are both inclined in a direction away from the housing.

[0015] Preferably, the width and height of the first bubble trap gradually increase along the flow direction.

[0016] Preferably, the width of the outlet end of the first bubble trap is equal to the width of the shell.

[0017] Preferably, adjacent hollow fibers are arranged close to each other.

[0018] Preferably, the blood inlet is located on the left side of the housing, and the blood outlet is located on the right side of the housing.

[0019] Preferably, a fixing portion is provided on the back side of the housing, and two fixing portions are arranged along the vertical direction.

[0020] Preferably, the liquid outlet and the liquid inlet are both elbow structures, and the liquid outlet and the liquid inlet are rotatably connected to the shell.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention has the function of air bubble diversion, convenient exhaust and high safety.

[0023] 2. The present invention uses hollow fibers to separate blood and coolant, resulting in a large heat exchange area and high heat exchange efficiency.

[0024] 3. The blood inlet of the present invention is higher than the blood outlet, and the blood is cooled.

[0025] 4. The present invention is convenient to place.

[0026] 5. The blood priming volume of the present invention is small, which can save blood when perfusing infants and young children.

[0027] 6. The first bubble trap of the present invention has a wider outlet, which can reduce the resistance of blood entering the cooling chamber.

[0028] 7. The inlet of the second bubble trap of the present invention is relatively wide, which can reduce the resistance when the blood is discharged from the cooling chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front cross-sectional view of the present invention;

[0030] Figure 2 It is a left side view of the present invention;

[0031] Figure 3 It is a right side view of the present invention;

[0032] Figure 4 A top view of the present invention;

[0033] Figure 5 is a schematic diagram of the fixed part;

[0034] Figure 6 Schematic diagram of hollow fiber.

[0035] In the figure: 1-housing, 2-liquid outlet chamber, 3-cooling chamber, 4-liquid inlet chamber, 5-liquid outlet, 6-liquid inlet, 7-hollow fiber, 8-blood inlet, 9-blood outlet, 10-first bubble catcher, 11-first exhaust port, 12-second bubble catcher, 13-second exhaust port, 14-sealing plug, 15-fixing part. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] like Figures 1 to 6 As shown, the present invention comprises a housing 1, and the housing 1 comprises a liquid outlet chamber 2, a cooling chamber 3, and a liquid inlet chamber 4 which are sequentially arranged from top to bottom; a liquid inlet 6 is provided on the bottom surface of the liquid inlet chamber 4, and a liquid outlet 5 is provided on the top surface of the liquid outlet chamber 2, and both the liquid outlet 5 and the liquid inlet 6 are elbow structures, and both the liquid outlet 5 and the liquid inlet 6 are rotatably connected to the housing 1;

[0038] A plurality of hollow fibers 7 are arranged in the cooling chamber 3. The hollow fibers 7 are arranged vertically, and adjacent hollow fibers 7 are arranged close to each other. The hollow fibers 7 are distributed in a honeycomb shape. The top of the hollow fiber 7 is connected to the liquid outlet chamber 2, and the bottom of the hollow fiber 7 is connected to the liquid inlet chamber 4. The hollow fiber 7 is sealedly connected to the liquid outlet chamber 2 and the liquid inlet chamber 4. A blood inlet 8 is arranged at the top of the cooling chamber 3, and a blood outlet 9 is arranged at the bottom of the cooling chamber 3. The blood inlet 8 and the blood outlet 9 are arranged on opposite sides of the cooling chamber 3. The blood inlet 8 is provided with a first bubble catcher 10, and the top height of the first bubble catcher 10 is greater than the top surface height of the cooling chamber 3. The blood outlet 9 is provided with a second bubble catcher 12.

[0039] The cross-sectional area of ​​the first bubble trap 10 gradually increases from upstream to downstream, and a first exhaust port 11 is provided on the top of the first bubble trap 10. The bottom height of the blood inlet 8 is ≥ the bottom height of the outlet end of the first bubble trap 10. The width and height of the first bubble trap 10 gradually increase along the flow direction. The width of the outlet end of the first bubble trap 10 is equal to the width of the shell 1, and the diameter of the first exhaust port 11 is smaller than the blood inlet 8.

[0040] The cross-sectional area of ​​the second bubble trap 12 gradually decreases from upstream to downstream. A second exhaust port 13 is provided on the top of the second bubble trap 12 . The structure of the second bubble trap 12 is the same as that of the first bubble trap 10 . The diameter of the second exhaust port 13 is smaller than the blood outlet 9 .

[0041] The first exhaust port 11 and the second exhaust port 13 are both inclined toward a direction away from the housing 1 , and are both provided with sealing plugs 14 .

[0042] The blood inlet 8 is located on the left side of the housing 1 , and the blood outlet 9 is located on the right side of the housing 1 .

[0043] A fixing portion 15 is provided on the back of the housing 1 , and two fixing portions 15 are arranged in the vertical direction.

[0044] In actual use, blood enters from the left blood inlet 8 and passes through the first bubble trap 10. As the blood flows, the cross-sectional area of ​​the flow channel gradually increases, and bubbles naturally overflow from the blood and accumulate on the top of the first bubble trap 10. The sealing plug 14 can be opened to exhaust or measure the blood pressure.

[0045] The blood reaches the outlet of the first bubble trap 10. Since the outlet of the first bubble trap 10 is relatively wide, it is convenient for the blood to enter the cooling chamber 3.

[0046] In the initial state, adjacent hollow fibers 7 are close to each other. When blood enters, the blood flows through the gaps between the hollow fibers 7 under the action of blood pressure. The blood is cooled and flows out from the blood outlet 9. The second bubble trap 12 can collect bubbles in the cooled blood.

[0047] At the same time, after removing the sealing plug 14, the first exhaust port 11 and the second exhaust port 13 can be connected to various joint devices, such as a tee, a cross, etc.

[0048] During use, the liquid outlet 5 and the liquid inlet 6 are both elbow structures, and the liquid outlet 5 and the liquid inlet 6 are rotatably connected to the shell 1, which can prevent the liquid inlet 6 and the liquid outlet 5 from bending at the connection with the coolant pipeline, resulting in reduced cooling effect.

[0049] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A low-capacity self-exhausting blood thermostat, characterized in that: The housing (1) comprises a liquid outlet chamber (2), a cooling chamber (3), and a liquid inlet chamber (4) which are arranged in sequence from top to bottom; The bottom surface of the liquid inlet chamber (4) is provided with a liquid inlet (6), and the top surface of the liquid outlet chamber (2) is provided with a liquid outlet (5); A plurality of hollow fibers (7) are arranged in a cooling chamber (3). The hollow fibers (7) are arranged vertically, adjacent hollow fibers (7) are arranged close to each other, and the hollow fibers (7) are distributed in a honeycomb shape. The top ends of the hollow fibers (7) are connected to the liquid outlet chamber (2), and the bottom ends of the hollow fibers (7) are connected to the liquid inlet chamber (4). The hollow fibers (7) are sealedly connected to the liquid outlet chamber (2) and the liquid inlet chamber (4). A blood inlet (8) is arranged at the top of the cooling chamber (3), and a blood outlet (9) is arranged at the bottom of the cooling chamber (3). Blood flows through the gaps between the hollow fibers (7). The blood inlet (8) and the blood outlet (9) are arranged on opposite sides of the cooling chamber (3). The blood inlet (8) is provided with a first bubble catcher (10), and the blood outlet (9) is provided with a second bubble catcher (12). The cross-sectional area of ​​the first bubble trap (10) gradually increases from upstream to downstream, and a first exhaust port (11) is provided at the top of the first bubble trap (10); the bottom surface height of the blood inlet (8) is greater than or equal to the bottom surface height of the outlet end of the first bubble trap (10); the cross-sectional area of ​​the second bubble trap (12) gradually decreases from upstream to downstream, and a second exhaust port (13) is provided at the top of the second bubble trap (12); The first exhaust port (11) and the second exhaust port (13) are both inclined in a direction away from the housing (1), and the first exhaust port (11) and the second exhaust port (13) are both provided with sealing plugs (14); the width and height of the first bubble catcher (10) are gradually increased along the flow direction.

2. The low-capacity self-exhausting blood thermostat according to claim 1, characterized in that: The width of the outlet end of the first bubble trap (10) is equal to the width of the housing (1).

3. The low-capacity self-exhausting blood thermostat according to claim 1, characterized in that: The blood inlet (8) is located on the left side of the housing (1), and the blood outlet (9) is located on the right side of the housing (1).

4. The low-capacity self-venting blood thermostat according to claim 1, characterized in that: A fixing portion (15) is provided on the back of the housing (1), and two fixing portions (15) are arranged in a vertical direction.

5. The low-capacity self-exhausting blood thermostat according to claim 1, characterized in that: The liquid outlet (5) and the liquid inlet (6) are both elbow structures, and the liquid outlet (5) and the liquid inlet (6) are both rotatably connected to the housing (1).

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