CN111603628A - A blood storage device for extracorporeal circulation in cardiac surgery - Google Patents

Abstract

The invention discloses a blood storage device for extracorporeal circulation in cardiac surgery. A liquid filling pipe passes through an upper cover and is connected with a puncture device and a trapezoidal joint through a three-way joint. After the inner wall of the right side of the bag is sealed and welded, an independent space is formed in the soft bag. The end of the liquid filling pipe 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. The bottom of the soft bag is also provided with a Liquid inlet pipe 1, liquid inlet pipe 2 and liquid outlet pipe, the liquid outlet pipe is connected with the lowest part of the soft bag, the upper ends of the liquid inlet pipe 1 and the liquid inlet pipe 2 respectively pass through the middle part of the soft bag and the lowest part of the filter screen and It is located between the filter screen 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 between the lowest part of the filter screen and the upper cover. The wall parts are respectively provided with liquid outlet holes staggered at uniform intervals. The invention can effectively reduce the contact between the blood and the air in the bag, and can ensure better filtering effect at the same time.

Description

A blood storage device for extracorporeal circulation in cardiac surgery

technical field

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

Background technique

During open-heart surgery, cardiopulmonary bypass is required to replace the work of the human heart and lungs to maintain systemic circulation and respiratory function. The traditional cardiopulmonary bypass blood reservoirs currently used are mostly hard-shelled and open-type designs, with large pre-charge and need to use more Prefill fluid for blood dilution before cardiopulmonary bypass. The second is the large contact area between blood and foreign bodies and air, which is likely to cause activation of coagulation and fibrinolysis systems, activation of complement, and inflammatory reactions; thus, it will affect the recovery of postoperative patients and even cause various complications of patients.

SUMMARY OF THE INVENTION

The present invention is to solve the above deficiencies, and provides a soft-hard combined closed blood storage device. The technical scheme is as follows: a blood storage device for extracorporeal circulation in cardiac surgery. It is connected with the puncture device and the trapezoidal joint, and is characterized in that: the lower part of the upper cover is connected with the soft bag, the soft bag is provided with a filter screen, and the four sides of the filter screen are sealed and welded with the inner wall of the right side of the soft bag. An independent space is formed in the soft bag, the end of the liquid addition pipe 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, and the bottom of the soft bag is also provided with a liquid inlet pipe. 2, the liquid inlet pipe and the liquid outlet pipe, the liquid outlet pipe is connected with the lowest part of the soft bag, the upper ends of the liquid inlet pipe 1 and the liquid inlet pipe 2 respectively pass through the middle part of the soft bag and the lowest part of the filter screen and Located between the filter screen 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, and the upper ends of the liquid inlet pipe 1 and the liquid inlet pipe 2 are located at the lowest part of the filter screen and the upper cover. The pipe wall parts between them are respectively provided with liquid outlet holes at uniform intervals and staggered, the diameter of the liquid outlet holes is 3-5mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2cm.

In order to make the working effect of the blood storage device better, the upper cover is of circular, hard-shell design, and its diameter is 10-25cm, and its height is 5-10cm; The joints of the lids are tightly joined together by welding or gluing, and the inner diameter of the upper part of the soft bag is the same as the outer diameter of the lower part of the upper lid.

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

An exhaust pipe is arranged at the connection between the soft bag and the upper cover, a three-way valve is arranged at the right end of the exhaust pipe, and a spare interface is also arranged 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. When pre-charging or when there are a lot of air bubbles, turn on the rapid exhaust, and close it after exhausting; open the top passage of the three-way valve, and the top passage is equipped with an automatic exhaust cap. There is a film on the top of the exhaust cap that allows the gas to pass through the liquid, and a small amount of air bubbles will be automatically discharged through the film when the flow is turned.

In order to connect various external equipments conveniently and quickly, the first liquid inlet pipe, the second liquid inlet pipe and the liquid outlet pipe are respectively provided with the fourth pipe clamp, the fifth pipe clamp and the third pipe clamp; Two and three.

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

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

The present invention has the following beneficial effects:

1. The soft bag of the blood storage device is in a flat state after the gas is partially exhausted, and a gas-free airtight system is formed in the bag to reduce the contact area between blood and air in the bag.

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

3. The part of the pipe body extending into the bag of the liquid feeding pipe, the liquid inlet pipe 1 and the liquid inlet pipe 2 also acts as a support to prevent the front and rear walls of the bag body from sticking together and affecting the blood flow.

4. When the liquid volume is insufficient, the liquid can be added quickly through the liquid addition port, and the liquid addition process can avoid the generation of air bubbles.

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

Description of drawings

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

Figure 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, pipe clip 2 3, pipe clip 1 4, tee joint 5, liquid filling pipe 6, spare interface 7, VAVD interface 8, water blocking filter 9, scale mark 10, positive Negative pressure safety regulating valve 11, exhaust pipe 12, three-way valve 13, filter screen 14, liquid inlet pipe one 15, liquid inlet pipe two 16, pipe clamp five 17, joint two 18, pipe clip four 19, joint one 20 , Pipe clamp three 21, liquid outlet pipe 22, joint three 23, upper cover 25, soft bag 26.

Detailed ways

As shown in Figures 1 to 2, a blood storage device for extracorporeal circulation in cardiac surgery, which consists of an upper cover 25, a positive and negative pressure safety regulating valve 11 and a VAVD interface 8 installed on the upper cover 25, a liquid filling pipe 6 Through the upper cover and connected with the puncture device 1 and the trapezoidal joint 2 through the tee joint 5, it is characterized in that: the lower part of the upper cover 25 is connected with the soft bag 26, and the soft bag 26 is provided with a filter screen 14, The four sides of the filter screen 14 are sealed and welded with the inner wall of the right side of the soft bag 26 to form an independent space in the soft bag 26 . Between the right side wall of the soft bag 26, the bottom of the soft bag 26 is also provided with a liquid inlet pipe 15, a liquid inlet pipe 2 16 and a liquid outlet pipe 22. The upper ends of the liquid inlet pipe 1 15 and the liquid inlet pipe 2 16 respectively pass through the middle of the soft bag 26 and the lowest part of the filter screen 14 and are located between the filter screen 14 and the right side wall of the soft bag 26, so The upper end of the liquid inlet pipe one 15 is lower than the liquid inlet pipe two 16, the upper ends of the liquid inlet pipe one 15 and the liquid inlet pipe two 16 are located at the lowest part of the filter screen 14 and the pipe wall part between the upper cover 26 is evenly spaced respectively. Liquid outlet holes are staggered, the diameter of the liquid outlet holes is 3-5mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2cm.

Described upper cover 25 is circular, hard shell design, and its diameter is 10-25cm, height is 5-10cm; Described soft bag 26 is inverted cone type, and its upper part and upper cover 25 are connected by welding or The glue is tightly bonded together, and the inner diameter of the upper part of the soft bag 26 is the same as the outer diameter of the lower part of the upper cover 25 .

The end of the liquid addition pipe 6 is 141-3 cm away from the bottom 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 first liquid inlet pipe 15, the second liquid inlet pipe 16 and the liquid outlet pipe 22 are respectively provided with a pipe clamp four 19, a pipe clamp five 17 and a pipe clamp three 21; and joint three 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.

The end of the VAVD interface 8 is provided with a water blocking filter 9 .

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

The blood storage device of the present invention is a component of the extracorporeal circulation system for cardiac surgery, and when in use, it forms a unified closed circulation system through extracorporeal circulation pipelines, blood pumps, oxygenators, arterial microthrombotic filters and other components.

The upper part of the device is a circular, hard-shell closed design, and the lower part is a soft bag. The inner diameter of the upper part of the soft bag is the same as the outer diameter of the lower part of the hard case. 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. The liquid in the bag first enters the liquid inlet cavity, and only after being filtered by the filter screen 14 can it 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 least residual amount of the soft bag 26 .

The cover is equipped with a VAVD interface 8 that can be connected to negative pressure auxiliary venous drainage, which can be connected to external negative pressure auxiliary 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 venous drainage. One end of the VAVD interface 8 located in the upper cover is connected to the water blocking filter 9, which is breathable and impermeable to liquid, preventing the liquid from entering the air path and causing pollution; at the same time, a positive and negative pressure safety regulating valve 11 is installed. It will automatically turn on at -60mmHg.

There is a liquid addition pipe 6 on the cover. The part of the liquid addition pipe 6 in the pipe extends to about 2/3 of the soft bag 26, and is 1-3 cm from the lowest part of the filter screen 14; the liquid addition pipe 6 is connected to the puncture device 1 through the tee joint 5. With trapezoidal joint 2, it can be connected to a liquid soft bag. During standby, the tube clip 1 4 and tube clip 2 3 are in the clamped state. If the liquid in the blood reservoir is insufficient, the liquid can be quickly replenished through the tube clip 1 4 and tube clip 2 3 interfaces. , to ensure the circulation flow.

The connection between the soft bag 26 and the upper cover 25 is equipped with an exhaust pipe 12, and the end is connected with a three-way valve 13; the upper side of the three-way valve 13 can be connected to the exhaust pipe to the upper cover spare interface 7, during pre-filling or when there are a lot of air bubbles Open the quick exhaust and close it after exhausting; open the top passage, the top is equipped with an automatic exhaust cap, and there is a film on the top of the exhaust cap that allows gas to pass through the liquid, and a small amount of air bubbles will be automatically discharged through the membrane when the flow is turned.

There is a capacity scale mark 10 on the bag body, the maximum liquid storage volume is 1500mL, a built-in filter screen 14, the filter screen aperture is 120-200 microns; the right side of the filter screen 14 is provided with liquid inlet pipe 1 15, liquid inlet pipe 2 16 and adding Liquid tube 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 extends into the side wall of the inner part of the pipe at a 90-degree staggered interval of 1-2cm and the diameter of the part is 3-5mm. The upper end 15 of the first liquid inlet pipe 15 should be lower than the second liquid inlet pipe 16.

The soft bag 26 of the blood storage device is in a suction-flat state after the gas is partially exhausted, and a gas-free airtight system is formed in the bag. When set to a soft bag configuration, it expels gas faster. The first liquid inlet pipe 15, the second liquid inlet pipe 16 and the liquid feeding pipe 6 extend into the part of the pipe body in the bag and play a supporting role at the same time, preventing the front and rear walls of the bag body from sticking together and affecting blood flow.

When using, use a special bracket to vertically fix the device on the artificial heart-lung machine to ensure that each pipeline is unobstructed and there is no discount. The liquid inlet pipe 2 16 is the main liquid inlet, and is connected to the pipeline to drain venous blood through the joint two 18; the liquid outlet pipe 22 is connected to the blood pump and oxygenator through the joint three 23; the liquid inlet pipe 15 is the secondary The liquid inlet is connected to the autologous blood and intraoperative suction blood recovery device through the connector 1 20. The liquid filling pipe 6 is connected to the puncture device 1 and the trapezoidal joint 2 through the three-way joint 5, which can be connected to a liquid soft bag and can be quickly filled with liquid. The above-mentioned outlet and inlet are controlled by pipe clamp 1 4, pipe clamp 2 3, pipe clamp 3 21, pipe clamp 4 19 and pipe clamp 5 17, and the pipe clamp can be opened or closed at any time to control the liquid in and out.

Claims (8)

1. The utility model provides a heart operation extracorporal circulatory system is with storing blood device which constitutes and includes upper cover (25) and install positive negative pressure safety control valve (11) and VAVD interface (8) on upper cover (25), and filling tube (6) pass the upper cover and are connected with puncture ware (1) and trapezoidal joint (2) through three way connection (5), its characterized in that: the lower part of the upper cover (25) is connected with a soft bag (26), a filter screen (14) is arranged in the soft bag (26), four sides of the filter screen (14) and the inner wall of the right side of the soft bag (26) are hermetically welded to form an independent space in the soft bag (26), the tail end of the liquid adding pipe (6) penetrates through the highest points of the upper cover (25) and the filter screen (14) and is positioned between the filter screen (14) and the right side wall of the soft bag (26), a liquid inlet pipe I (15), a liquid inlet pipe II (16) and a liquid outlet pipe (22) are further arranged at the bottom of the soft bag (26), the liquid outlet pipe (22) is connected with the lowest part of the soft bag (26), the upper ends of the liquid inlet pipe I (15) and the liquid inlet pipe II (16) respectively penetrate through the middle part of the soft bag (26) and the lowest part of the filter screen (14) and is positioned between the filter screen (14) and the right side wall of the soft bag (26), and the upper end, liquid outlet holes are respectively and uniformly arranged on the pipe wall parts, located between the lowest part of the filter screen (14) and the upper cover (26), of the upper ends of the first liquid inlet pipe (15) and the second liquid inlet pipe (16) in a staggered mode at intervals, the diameters of the liquid outlet holes are 3-5mm, and the longitudinal spacing distance between the liquid outlet holes is 1-2 cm.

2. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: the upper cover (25) is in a round and monocoque design, the diameter of the upper cover is 10-25cm, and the height of the upper cover is 5-10 cm; the soft bag (26) is in an inverted cone shape, the upper part of the soft bag is tightly combined with the upper cover (25) through welding or adhesive bonding, and 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).

3. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: the distance between the tail end of the liquid adding pipe (6) and the lowest part of the filter screen (14) is 1-3 cm.

4. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: an exhaust pipe (12) is arranged at the joint of the soft bag (26) and the upper cover (25), and a three-way valve (13) is arranged at the right end of the exhaust pipe (12).

5. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: the first liquid inlet pipe (15), the second liquid inlet pipe (16) and the liquid outlet pipe (22) are respectively provided with a fourth pipe clamp (19), a fifth pipe clamp (17) and a third pipe clamp (21); and the tail ends of the two connectors are respectively provided with a first connector (20), a second connector (18) and a third connector (23).

6. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: the upper cover (25) is also provided with a standby interface (7).

7. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: the aperture of the filter screen (14) is 120-200 microns.

8. The blood reservoir device for extracorporeal circulation for cardiac surgery according to claim 1, wherein: and a water blocking filter (9) is arranged at the tail end of the VAVD interface (8).

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