CN111603628B - Blood storage device for extracorporeal circulation of heart operation - Google Patents

Abstract

The invention discloses a blood storage device for extracorporeal circulation of heart operation, a liquid adding pipe penetrates through an upper cover and is connected with a puncture outfit and a trapezoid connector through a tee joint, a filter screen is arranged in a soft bag, four sides of the filter screen are sealed and welded with the inner wall of the right side of the soft bag to form an independent space in the soft bag, the tail end of the liquid adding pipe penetrates through the upper cover and the filter screen and is positioned between the filter screen and the right side wall of the soft bag, a liquid inlet pipe I, a liquid inlet pipe II and a liquid outlet pipe are further arranged at the bottom of the soft bag, the liquid outlet pipe is connected with the lowest part of the soft bag, the upper ends of the liquid inlet pipe I and the liquid inlet pipe II respectively penetrate through the middle part of the soft bag and the lowest part of the filter screen and are positioned between the filter screen and the right side wall of the soft bag, the upper ends of the liquid inlet pipe I and the liquid inlet pipe II are respectively and uniformly provided with liquid outlet holes at intervals in a staggered mode. The invention can effectively reduce the contact between the blood and the air in the bag and ensure better filtering effect.

Description

A blood storage device for extracorporeal circulation in cardiac surgery

Technical Field

The invention relates to a medical device, in particular to a blood storage device for extracorporeal circulation in cardiac surgery.

Background Art

During open heart surgery, extracorporeal circulation is required to replace the human heart and lungs to maintain systemic circulation and respiratory function. The traditional extracorporeal circulation blood reservoirs currently used are mostly hard-shell, open-type designs with large pre-filled volumes, requiring more pre-filled fluid for blood dilution before extracorporeal circulation can be performed. Secondly, the contact area between blood and foreign bodies and air is large, which can easily cause activation of the coagulation and fibrinolytic systems, complement activation, and inflammatory reactions; thus, it will affect the patient's recovery after surgery and may even cause multiple complications in the patient.

Summary of the invention

The present invention aims to solve the above-mentioned shortcomings and provide a soft-hard combination closed blood storage device. Its technical solution is: a blood storage device for extracorporeal circulation in cardiac surgery, which comprises an upper cover and a positive and negative pressure safety regulating valve and a VAVD interface installed on the upper cover. The liquid adding tube passes through the upper cover and is connected to the puncture device and the trapezoidal joint through a three-way joint. It is characterized in that: the lower part of the upper cover is connected to the soft bag, a filter screen is arranged in the soft bag, and the four sides of the filter screen are sealed and welded to the right inner wall of the soft bag to form an independent space in the soft bag. The end of the liquid adding tube passes through the upper cover and the filter screen and is located between the filter screen and the right side wall of the soft bag. A liquid inlet pipe 1, a liquid inlet pipe 2 and a liquid outlet pipe are also provided at the bottom, and the liquid outlet pipe is connected to the lowest point of the soft bag. The upper ends of the liquid inlet pipe 1 and the liquid inlet pipe 2 respectively pass through the middle of the soft bag and the lowest point of the filter net and are located between the filter net and the right side wall of the soft bag. The upper end of the liquid inlet pipe 1 is lower than the liquid inlet pipe 2. The upper ends of the liquid inlet pipe 1 and the liquid inlet pipe 2 are located at the lowest point of the filter net and the upper cover. Liquid outlet holes are evenly and alternately provided on the tube wall part, the diameter of the liquid outlet hole is 3-5mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2cm.

In order to make the blood storage device work better, the upper cover is circular and hard shell-like in design, and its diameter is 10-25cm and its height is 5-10cm; the soft bag is in the shape of an inverted cone, and its upper part is tightly combined with the upper cover by welding or gluing, and the inner diameter of the upper part of the soft bag is consistent with the outer diameter of the lower part of the upper cover.

In order to allow the added liquid to mix better with the blood and generate bubbles, the end of the liquid adding tube is 1-3 cm away from the lowest point of the filter screen.

An exhaust pipe is provided at the connection between the soft bag and the upper cover, a three-way valve is provided at the right end of the exhaust pipe, and a spare interface is also provided on the upper cover. The upper side of the three-way valve can be connected to the exhaust pipe to the spare interface of the upper cover, which is opened for quick exhaust during pre-filling or when there are a large number of bubbles, and closed after exhaust; the top passage of the three-way valve is opened, and the top passage is equipped with an automatic exhaust cap. There is a layer of membrane on the top of the exhaust cap that allows gas to pass through but not liquid. When the flow is diverted, a small amount of bubbles will be automatically discharged through the membrane.

In order to conveniently and quickly connect various external devices, the liquid inlet pipe 1, liquid inlet pipe 2 and liquid outlet pipe are respectively provided with pipe clamp 4, pipe clamp 5 and pipe clamp 3; and their ends are respectively provided with connector 1, connector 2 and connector 3.

In order to achieve better filtering effect, the pore size of the filter is 120-200 microns.

In order to ensure safer use, a water-blocking filter is provided at the end of the VAVD interface.

The present invention has the following beneficial effects:

1. The soft bag of the blood storage device is flattened after the gas is exhausted, forming a gas-free closed system in the bag, reducing the contact area between the blood in the bag and the air.

2. When venous drainage is insufficient under the action of gravity and siphon, a specific negative pressure device can be connected through the VAVD interface on the hard shell cover to generate a certain negative pressure to assist venous drainage.

3. The parts of the liquid adding tube, liquid inlet tube 1 and liquid inlet tube 2 extending into the bag also play a supporting role to prevent the front and rear walls of the bag from sticking together and affecting blood flow.

4. When the liquid volume is insufficient, you can quickly add liquid through the liquid filling port, and the addition process can avoid the generation of bubbles.

5. The filter screen of the present invention and the right side wall of the soft bag form a relatively closed space. When the liquid entering through the liquid adding pipe, liquid inlet pipe 1 and liquid inlet pipe 2 flows to the bottom of the soft bag, it must pass through the filter screen to flow into the space between the filter screen and the left side wall of the soft bag, and then flow downward, ensuring the filtering effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic side view of the structure of FIG. 1 .

In the figure: puncture device 1, trapezoidal joint 2, tube clamp 2 3, tube clamp 1 4, three-way joint 5, liquid adding tube 6, spare interface 7, VAVD interface 8, water blocking filter 9, scale mark 10, positive and negative pressure safety regulating valve 11, exhaust pipe 12, three-way valve 13, filter screen 14, liquid inlet tube 1 15, liquid inlet tube 2 16, tube clamp 5 17, connector 2 18, tube clamp 4 19, connector 1 20, tube clamp 3 21, liquid outlet tube 22, connector 3 23, upper cover 25, soft bag 26.

DETAILED DESCRIPTION

As shown in Figures 1 and 2, a blood storage device for extracorporeal circulation in cardiac surgery comprises an upper cover 25 and a positive and negative pressure safety regulating valve 11 and a VAVD interface 8 installed on the upper cover 25. A liquid adding tube 6 passes through the upper cover and is connected to a puncture device 1 and a trapezoidal joint 2 through a three-way joint 5. The device is characterized in that: the lower part of the upper cover 25 is connected to a soft bag 26, a filter screen 14 is arranged in the soft bag 26, and the four sides of the filter screen 14 are sealed and welded to the right inner wall of the soft bag 26 to form an independent space in the soft bag 26. The end of the liquid adding tube 6 passes through the upper cover 25 and the filter screen 14 and is located between the filter screen 14 and the right side wall of the soft bag 26. A liquid inlet pipe 15, a liquid inlet pipe 216 and a liquid outlet pipe 22 are also provided at the bottom of the soft bag 26. The liquid outlet pipe 22 is connected to the lowest point of the soft bag 26. The upper ends of the liquid inlet pipe 15 and the liquid inlet pipe 216 pass through the middle of the soft bag 26 and the lowest point of the filter screen 14 respectively and are located between the filter screen 14 and the right side wall of the soft bag 26. The upper end of the liquid inlet pipe 15 is lower than the liquid inlet pipe 216. The upper ends of the liquid inlet pipe 15 and the liquid inlet pipe 216 are located on the tube wall portion between the lowest point of the filter screen 14 and the upper cover 25, and liquid outlet holes are evenly and alternately arranged. The diameter of the liquid outlet hole is 3-5 mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2 cm.

The upper cover 25 is circular and hard shell-like in design, and has a diameter of 10-25 cm and a height of 5-10 cm; the soft bag 26 is in the shape of an inverted cone, and its upper part is tightly connected to the upper cover 25 by welding or gluing, and the upper inner diameter of the soft bag 26 is consistent with the lower outer diameter of the upper cover 25.

The end of the liquid adding pipe 6 is 141-3 cm away from the lowest filter screen.

An exhaust pipe 12 is disposed at the connection between the soft bag 26 and the upper cover 25 , and a three-way valve 13 is disposed at the right end of the exhaust pipe 12 .

The liquid inlet pipe 15, the liquid inlet pipe 2 16 and the liquid outlet pipe 22 are respectively provided with a pipe clamp 4 19, a pipe clamp 5 17 and a pipe clamp 3 21; and the ends thereof are respectively provided with a connector 1 20, a connector 2 18 and a connector 3 23.

The upper cover 25 is also provided with a spare interface 7 .

The pore size of the filter screen 14 is 120-200 microns.

A water blocking filter 9 is provided at the end of the VAVD interface 8 .

The trocar 1 and the trapezoidal joint 2 are provided with a tube clamp 1 4 and a tube clamp 2 3 respectively.

The blood storage device of the present invention is a component in the extracorporeal circulation system of cardiac surgery. When in use, it forms a unified closed circulation system through the extracorporeal circulation pipeline and blood pump, oxygenator, arterial microembolism filter and other components.

The upper part of the device is circular and hard-shell sealed, and the lower part is a soft bag. The inner diameter of the upper part of the soft bag is consistent with the outer diameter of the lower part of the hard shell. The filter screen 14 in the soft bag 26 divides the inner cavity of the soft bag into two parts, one part is the liquid inlet cavity, and the other part is the liquid outlet cavity. All liquids entering the bag through the liquid adding pipe 6, the liquid inlet pipe 1 15 and the liquid inlet pipe 2 16 first enter the liquid inlet cavity, and only after being filtered by the filter screen 14 can they enter the liquid outlet cavity and flow out from the liquid outlet pipe 22. The liquid outlet 22 is at the lowest end of the soft bag, which can ensure the minimum residual amount of the soft bag 26.

The cover is equipped with a VAVD interface 8 that can be connected to negative pressure assisted venous drainage. When the venous drainage is insufficient under the action of gravity and siphon, a certain negative pressure is generated by a specific negative pressure device to assist the venous drainage. One end of the VAVD interface 8 located inside the upper cover is connected to a water-blocking filter 9, which is air-permeable but not liquid-permeable to prevent liquid from entering the air path and causing pollution; at the same time, a positive and negative pressure safety regulating valve 11 is installed, which will automatically open when the pressure in the blood storage device is greater than 2mmHg or less than -60mmHg.

The cover is provided with a liquid adding tube 6, the part of the liquid adding tube 6 in the tube extends to about 2/3 of the soft bag 26, 1-3 cm away from the lowest point of the filter 14; the liquid adding tube 6 is connected to the puncture device 1 and the trapezoidal joint 2 through a three-way joint 5, and can be externally connected to a liquid soft bag. When in standby mode, the tube clamp 1 4 and the tube clamp 2 3 are in a clamped state. If the liquid volume in the blood reservoir is insufficient, the liquid can be quickly supplemented through the interface of the tube clamp 1 4 and the tube clamp 2 3 to ensure the circulation flow.

An exhaust pipe 12 is installed at the connection between the soft bag 26 and the upper cover 25, and a three-way valve 13 is connected to the end; the upper side of the three-way valve 13 can be connected to the exhaust pipe to the spare interface 7 of the upper cover, which is opened for rapid exhaust during pre-filling or when there are a large number of bubbles, and closed after exhaust; the top passage is opened, and an automatic exhaust cap is provided on the top. There is a membrane on the top of the exhaust cap that allows gas to pass through but not liquid. A small amount of bubbles will be automatically discharged through the membrane during diversion.

The bag body is marked with a capacity scale 10, with a maximum liquid storage capacity of 1500mL, a built-in filter screen 14, and a filter screen aperture of 120-200 microns; on the right side of the filter screen 14, there are a liquid inlet pipe 15, a liquid inlet pipe 2 16 and a liquid adding pipe 6. The length of the liquid inlet pipe 15 and the liquid inlet pipe 2 16 extending into the bag accounts for 1/3 of the height of the filter screen, and the side holes extending into the bag are staggered at 90 degrees and evenly spaced at intervals of 1-2cm with a diameter of 3-5mm; the upper end 15 of the liquid inlet pipe 15 is lower than the liquid inlet pipe 2 16.

After the blood storage device soft bag 26 is partially exhausted, it is in a flattened state, and a gas-free closed system is formed in the bag. After being set as a soft bag structure, the speed of exhausting gas is faster. The liquid inlet pipe 15, the liquid inlet pipe 2 16 and the liquid adding pipe 6 extend into the part of the bag body and play a supporting role at the same time, preventing the front and rear walls of the bag body from sticking together and affecting the blood flow.

When in use, a special bracket is used to fix the device vertically on the artificial heart-lung machine to ensure that all pipelines are unobstructed and without bends. The inlet pipe 2 16 is the main inlet, and the pipeline is connected to the human body's venous blood drainage through the connector 2 18; the outlet pipe 22 is connected to the blood pump and oxygenator through the connector 3 23; the inlet pipe 15 is the secondary inlet, and the pipeline is connected to the autologous blood and the intraoperative surgical field suction blood recovery device through the connector 1 20. The liquid adding pipe 6 is connected to the puncture device 1 and the trapezoidal joint 2 through the three-way connector 5, and can be connected to an external liquid soft bag for rapid liquid filling. The above-mentioned inlets and outlets are controlled by the tube clamp 1 4, the tube clamp 2 3, the tube clamp 3 21, the tube clamp 4 19 and the tube clamp 5 17 respectively, and the tube clamps can be opened or closed at any time as needed to control the liquid in and out.

Claims (6)

1. A blood storage device for extracorporeal circulation in cardiac surgery, comprising an upper cover (25) and a positive and negative pressure safety regulating valve (11) and a VAVD interface (8) mounted on the upper cover (25); a liquid adding tube (6) passes through the upper cover and is connected to a puncture device (1) and a trapezoidal joint (2) through a three-way joint (5); the lower part of the upper cover (25) is connected to a soft bag (26); a filter screen (14) is arranged in the soft bag (26); the filter screen (14) The four sides of the soft bag (26) are sealed and welded to the right inner wall of the soft bag (26) to form an independent space in the soft bag (26). The end of the liquid adding pipe (6) passes through the highest point of the upper cover (25) and the filter screen (14) and is located between the filter screen (14) and the right side wall of the soft bag (26). The bottom of the soft bag (26) is also provided with a liquid inlet pipe 1 (15), a liquid inlet pipe 2 (16) and a liquid outlet pipe (22). The liquid outlet pipe (22) is connected to the lowest point of the soft bag (26). The upper ends of the first liquid inlet pipe (15) and the second liquid inlet pipe (16) respectively pass through the middle of the soft bag (26) and the lowest point of the filter screen (14) and are located between the filter screen (14) and the right side wall of the soft bag (26). The upper end of the first liquid inlet pipe (15) is lower than the second liquid inlet pipe (16). The upper ends of the first liquid inlet pipe (15) and the second liquid inlet pipe (16) are located at the tube wall portion between the lowest point of the filter screen (14) and the upper cover (25) and are evenly spaced and staggered. A liquid outlet hole is provided, the diameter of the liquid outlet hole is 3-5 mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2 cm. The upper cover (25) is circular and hard shell-like in design, and its diameter is 10-25 cm and its height is 5-10 cm. The soft bag (26) is in the shape of an inverted cone, and its upper part is tightly connected with the upper cover (25) by welding or gluing. The inner diameter of the upper part of the soft bag (26) is consistent with the outer diameter of the lower part of the upper cover (25). The end of the liquid adding pipe (6) is 1-3 cm away from the lowest point of the filter screen (14). 2. A blood storage device for extracorporeal circulation in cardiac surgery according to claim 1, characterized in that an exhaust pipe (12) is provided at the connection between the soft bag (26) and the upper cover (25), and a three-way valve (13) is provided at the right end of the exhaust pipe (12). 3. A blood storage device for extracorporeal circulation in cardiac surgery according to claim 1, characterized in that: the liquid inlet tube 1 (15), the liquid inlet tube 2 (16) and the liquid outlet tube (22) are respectively provided with a tube clamp 4 (19), a tube clamp 5 (17) and a tube clamp 3 (21); and the ends thereof are respectively provided with a connector 1 (20), a connector 2 (18) and a connector 3 (23). 4. A blood storage device for extracorporeal circulation in cardiac surgery according to claim 1, characterized in that a spare interface (7) is also provided on the upper cover (25). 5. A blood storage device for extracorporeal circulation in cardiac surgery according to claim 1, characterized in that the pore size of the filter (14) is 120-200 microns. 6. A blood storage device for extracorporeal circulation in cardiac surgery according to claim 1, characterized in that a water blocking filter (9) is provided at the end of the VAVD interface (8).