阅读说明：本技术 一种用于治疗Fontan术后循环衰竭的串联轴流泵辅助装置及其使用方法 (Serial axial flow pump auxiliary device for treating Fontan postoperative circulation failure and using method thereof ) 是由 周诚 夏家红 吴杰 于 2021-02-07 设计创作，主要内容包括：本发明涉及一种用于治疗Fontan术后循环衰竭的串联轴流泵辅助装置及其使用方法,包括圆柱形的罩体,所述罩体的一端设有底板,所述罩体的另一端设有进流口,所述底板上设有电机,所述电机的输出轴连接有转轴,所述转轴上同轴地设有两个轴流泵转子,两个所述轴流泵转子的朝向相反,所述罩体的两侧对称地设有两个出流口,所述出流口的朝向与所述进流口的朝向垂直,所述底板上设有通流孔,所述电机与穿过所述底板的电缆连接。本发明用于Fontan手术后将腔静脉内的血液泵送进入肺动脉内,可以治疗Fontan循环衰竭,使用时无需精确定位,不易发生故障,适应性好。(The invention relates to a serial axial flow pump auxiliary device for treating Fontan postoperative circulation failure and a using method thereof. The invention is used for pumping blood in the vena cava into the pulmonary artery after Fontan operation, can treat Fontan circulatory failure, does not need accurate positioning when in use, is not easy to generate faults and has good adaptability.)

1. A series connection axial-flow pump auxiliary device for treating Fontan postoperative circulatory failure, which is characterized in that: including the columniform cover body, the one end of the cover body is equipped with the bottom plate, the other end of the cover body is equipped with the influent stream mouth, be equipped with the motor on the bottom plate, the output shaft of motor has the pivot, be equipped with two axial-flow pump rotors, two in the pivot coaxially the orientation of axial-flow pump rotor is opposite, the bilateral symmetry of the cover body is equipped with two at least outflows mouths, the orientation of outflows mouth with the orientation of influent stream mouth is perpendicular, be equipped with the through-flow hole on the bottom plate, the motor with pass the cable junction of bottom plate.

2. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the axial flow pump is characterized in that a guide plate is arranged in the cover body and arranged between the two axial flow pump rotors, a sealing gasket is arranged between the guide plate and the rotating shaft, and a flow outlet channel is formed between the guide plate and the flow outlet.

3. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the utility model discloses a bearing, including the cover body, the cover body is equipped with the bracing piece on the both ends inner wall of cover body, be equipped with the holding ring on the bracing piece, the pivot passes the holding ring, the holding ring with be equipped with the bearing between the pivot.

4. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the axial flow pump rotor includes an impeller and a guide vane.

5. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: and horn-shaped suction ports are arranged at two ends of the cover body.

6. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the outer part of the cover body is provided with two sealing rings which are respectively arranged on two sides of the outflow port, and the outer edge of each sealing ring is provided with a flexible gasket.

7. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the motor is an anti-reverse motor.

8. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: and a flexible shaft section is arranged on a rotating shaft between the two axial flow pump rotors, and the cover body is a metal flexible hose.

9. A tandem axial flow pump assist device for treating post-Fontan circulatory failure according to claim 1, wherein: the number of the outflow openings is 2-6, and the outflow openings are uniformly arranged on the cover body along the circumferential direction of the cover body.

10. Use of a tandem axial flow pump aid for the treatment of post-Fontan circulatory failure according to any of claims 1-9, comprising the steps of:

step one, a hole is formed in a jugular vein of a patient after a Fontan operation, the cover body is placed into the patient through the jugular vein or a femoral vein until two ends of the cover body are respectively positioned in a superior vena cava and an inferior vena cava, the outflow port is positioned in a pulmonary artery, and the cable is positioned outside the patient and used for being connected with a power supply;

connecting the cable with a power supply to enable the motor to rotate, driving the two axial flow pump rotors to rotate by the motor, and respectively enabling blood in the superior vena cava and the inferior vena cava at two ends of the cover body to enter pulmonary arteries through the two outflow ports under the pumping of the axial flow pump rotors due to the fact that the directions of the two axial flow pump rotors are opposite;

and step three, adjusting the position of the cover body, fixing the cable outside the patient body to realize stable Fontan circulation, and taking the cover body out of the patient body through the cable after use.

The technical field is as follows:

the invention relates to the technical field of Fontan postoperative auxiliary treatment instruments, in particular to a serial axial flow pump auxiliary device for treating Fontan postoperative circulatory failure and a using method thereof.

Background art:

fontan surgery is also known as pulmonary artery ventricular open placement. Is the only intracardiac correction method for treating complex intracardiac deformity such as tricuspid valve occlusion, single ventricle, pulmonary artery occlusion, splenomegaly and the like. The most commonly used Fontan procedure is the external channel TCPC (vena cava-pulmonary artery junction) procedure, which is based on the basic idea of directly connecting the superior and inferior vena cava to the right pulmonary artery, placing the right ventricle in an open position, and using the only ventricle to undertake the systemic circulation. This procedure separates the systemic circulation from the pulmonary circulation, significantly improving hypoxia and quality of life in single ventricular patients, and has become a milestone for single ventricular therapy. However, in the long-term follow-up after the Fontan surgery, it was found that a large number of patients in the long term had vena cava blood that could not effectively enter the pulmonary arteries due to the lack of right ventricle in the pulmonary circulation, and thus Fontan circulatory failure occurred. It is manifested by persistent heart failure, edema, low cardiac output, impaired exercise tolerance, intractable tachyarrhythmia, protein loss enteropathy, plastic bronchitis, etc., and has extremely high lethality rate. Therefore, it is a hot research to assist the heart of such patients and improve their therapeutic effects. Patent application number is CN 201910909761.1's patent is through setting up sacculus and umbrella valve, the pulmonary artery after the Fontan operation is placed in to the sacculus, the intersection of superior vena cava and inferior vena cava, and the both ends of sacculus are arranged in superior vena cava and inferior vena cava respectively, umbrella valve is all installed at the upper and lower both ends of sacculus, opening and shutting of umbrella valve is synchronous with the sacculus gassing work of filling, fill the gassing along with the sacculus, make the blood extrusion of the interior of superior vena cava and inferior vena cava get into the pulmonary artery, make the pulsive pulmonary artery that enters into of blood, play the effect of part right ventricle, thereby treat Fontan circulatory failure's patient, provide the powerful condition for later stage heart transplantation operation. However, the structure needs to continuously inflate and deflate the balloon, the extrusion of blood in the vena cava is intermittent, the requirements on the stability of inflation and deflation equipment arranged outside the body and the sealing performance of the balloon are high, the pulmonary artery blood can generate reverse flow when the balloon is contracted, the efficiency is reduced, and the vena cava can be collapsed after long-term use, so that the risk of blood vessel injury is caused.

The invention content is as follows:

technical problem to be solved

The invention aims to provide a serial axial flow pump auxiliary device for treating Fontan postoperative circulation failure and a using method thereof, which are used for auxiliary treatment after Fontan operation and solve the problems that in the prior art, the requirements on the stability of inflation and deflation equipment and the sealing performance of a balloon are high, pulmonary artery blood can generate reverse flow when the balloon is contracted, and the long-time use of the balloon can cause vena cava collapse to cause vascular injury.

(II) technical scheme

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a series connection axial-flow pump auxiliary device for treating Fontan postoperative circulation failure, includes the columniform cover body, the one end of the cover body is equipped with the bottom plate, the other end of the cover body is equipped with the influent stream mouth, be equipped with the motor on the bottom plate, the output shaft of motor has the pivot, be equipped with two axial-flow pump rotors, two coaxially in the pivot axial-flow pump rotor's orientation is opposite, the bilateral symmetry of the cover body is equipped with two at least outflow mouths, the orientation of outflow mouth with the orientation of influent stream mouth is perpendicular, be equipped with the through-flow hole on the bottom plate, the motor with pass the cable junction of bottom plate.

The cover body is used for inserting the vena cava of the patient after the Fontan operation, the both ends of the cover body are respectively in superior vena cava and inferior vena cava, the outflow port is in pulmonary artery, the motor is used for driving the axial-flow pump rotor, the cable is used for doing the motor power supply, and fix a position the position of the cover body in the patient is internal, because two the orientation of axial-flow pump rotor is opposite, when the axial-flow pump rotor rotates, the blood of superior vena cava and inferior vena cava passes through respectively the through-flow hole with the inflow port gets into the cover is internal, quilt pass through after the pumping of axial-flow pump rotor the outflow port flows out to the realization is sent into pulmonary artery with the blood of superior vena cava and inferior vena cava, simulates partial right ventricle's function, in order to treat. The axial-flow pump rotor is continuous when in operation, pulmonary artery blood backflow cannot occur, the requirement on the sealing performance is not high, the axial-flow pump rotor only stops operating when in failure, the life safety of a patient cannot be endangered, and the upper and lower vena cava are propped up by the cover body, so that the vena cava can be prevented from collapsing.

Further, the internal guide plate that is equipped with of cover, the guide plate sets up two between the axial-flow pump rotor, the guide plate with be equipped with seal ring between the pivot, the guide plate with form out the runner between the outflowing port, the guide plate is used for right the blood of axial-flow pump rotor pumping carries out the water conservancy diversion, and opposite to two orientations the blood of axial-flow pump rotor pumping is separated, prevents to produce the liquid vortex, improves blood transport's stability, and the blood process of upper and lower vena cava is passed through after the axial-flow pump rotor pumping the outflowing port flows with two.

Further, be equipped with the bracing piece on the both ends inner wall of the cover body, be equipped with the holding ring on the bracing piece, the pivot passes the holding ring, the holding ring with be equipped with the bearing between the pivot, the bracing piece with the holding ring is used for right the pivot is fixed a position, strengthens stability when axial-flow pump rotor moves.

Further, the axial flow pump rotor includes an impeller and a guide vane that can reduce the flow velocity of blood driven by the impeller and improve the uniformity of the flow velocity of the blood.

Furthermore, the two ends of the cover body are provided with the horn-shaped suction ports, so that the flow area of blood flowing into the cover body is increased while the vena cava vessel wall is stretched, and the through-flow effect during blood pumping is enhanced.

Further, the outside of the cover body is equipped with the sealing ring, the sealing ring has two, sets up respectively the both sides of outflowing port, the outer fringe of sealing ring is equipped with flexible packing ring, the sealing ring with flexible packing ring is used for carrying out the shutoff to the vena cava blood vessel wall, prevents to follow the blood reflux that the outflowing port flows gets into the vena cava, influences treatment.

Furthermore, the motor is an anti-reverse motor, and the motor is prevented from reversing when not powered, so that the blood flow in the vena cava is prevented from being interfered.

Furthermore, two be equipped with flexible shaft section in the pivot between the axial-flow pump rotor, the cover body is the flexible hose of metal, two the axial-flow pump rotor can be at certain angle's stagger in the blood vessel, and is convenient the cover body turns to in the blood vessel, still can use when the junction of superior vena cava and inferior vena cava is not a straight line, improves the suitability.

Furthermore, the number of the outflow openings is 2-6, the cover body is uniformly arranged along the circumferential direction of the cover body, so that after the cover body is inserted into a blood vessel, part of the outflow openings face to the pulmonary artery blood vessel, the direction of the outflow openings does not need to be accurately adjusted, and the use is convenient.

The invention also provides a using method of the serial axial flow pump auxiliary device for treating the Fontan postoperative circulatory failure, which comprises the following steps:

step one, a hole is formed in a jugular vein of a patient after a Fontan operation, the cover body is placed into the patient through the jugular vein or a femoral vein until two ends of the cover body are respectively positioned in a superior vena cava and an inferior vena cava, the outflow port is positioned in a pulmonary artery, and the cable is positioned outside the patient and used for being connected with a power supply;

connecting the cable with a power supply to enable the motor to rotate, driving the two axial flow pump rotors to rotate by the motor, and respectively enabling blood in the superior vena cava and the inferior vena cava at two ends of the cover body to enter pulmonary arteries through the two outflow ports under the pumping of the axial flow pump rotors due to the fact that the directions of the two axial flow pump rotors are opposite;

and step three, adjusting the position of the cover body, fixing the cable outside the patient body to realize stable Fontan circulation, and taking the cover body out of the patient body through the cable after use.

Through the steps, the stable blood conveying between the upper cavity vein and the lower cavity vein and the pulmonary artery is realized, so that the function of partial right ventricle is realized, and the Fontan circulatory failure patient is treated.

(III) advantageous effects

Compared with the prior art, the invention has the following beneficial effects: two axial flow pump rotors connected with the output shaft of the motor are coaxially arranged in a cylindrical cover body, the directions of the two axial flow pump rotors are opposite, two ends of the cover body are respectively provided with a flow inlet and a flow through hole, two sides of the cover body are symmetrically provided with flow outlets, the directions of the flow outlets are vertical to the directions of the flow inlets, the two ends of the cover body can be respectively placed in the superior vena cava and the inferior vena cava, the outflow port is placed in the pulmonary artery, the motor drives the axial-flow pump rotor to rotate, the blood of the superior vena cava and the inferior vena cava is pumped into the pulmonary artery, the function of part of right ventricle is simulated to treat Fontan circulatory failure, the rotor of the axial flow pump is continuous when running, the pulmonary artery blood is prevented from generating counter flow, and the requirement on the sealing performance is not high, the operation can be stopped only when a fault occurs, the life safety of a patient can not be endangered, the vena cava can be effectively prevented from collapsing, and the blood vessel injury can be avoided.

Description of the drawings:

in order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.

FIG. 1 is a front view of a tandem axial flow pump assist device for treating Fontan postoperative circulatory failure according to embodiments one and two of the present invention;

FIG. 2 is a top view of a tandem axial flow pump assist device for treating Fontan post-operative circulatory failure according to embodiments one and two of the present invention;

FIG. 3 is a cross-sectional view of a tandem axial flow pump assist device for treating post-Fontan circulatory failure in accordance with one embodiment of the present invention in use;

FIG. 4 is an enlarged partial cross-sectional view of the positioning ring site of the tandem axial flow pump assist device for treating post-Fontan circulatory failure according to the first and second embodiments of the present invention;

FIG. 5 is a cross-sectional view of a tandem axial pump assist device for treating post-Fontan circulatory failure according to example two of the present invention in use;

FIG. 6 is a schematic illustration of a tandem axial flow pump assist device for treating post-Fontan circulatory failure according to first and second embodiments of the present invention in use within the heart;

FIG. 7 is a schematic representation of the heart after a second Fontan operation according to one embodiment of the present invention;

in the figure: 1. a cover body; 2. a base plate; 3. a flow inlet; 4. a motor; 5. a rotating shaft; 6. an axial flow pump rotor; 61. an impeller; 62. a guide vane; 7. an outflow port; 8. a through-flow aperture; 9. a cable; 10. a baffle; 11. a sealing gasket; 12. discharging the flow channel; 13. a support bar; 14. a positioning ring; 15. a bearing; 16. a trumpet-shaped suction port; 17. a seal ring; 18. a flexible gasket; 19. a flexible shaft section; 20. the superior vena cava; 21. the inferior vena cava; 22. pulmonary artery

The specific implementation mode is as follows:

the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example one

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 6 and fig. 7, the serial axial flow pump auxiliary device for treating Fontan postoperative circulation failure includes a cylindrical cover 1, a bottom plate 2 is arranged at one end of the cover 1, a flow inlet 3 is arranged at the other end of the cover 1, a motor 4 is arranged on the bottom plate 2, an output shaft of the motor 4 is connected with a rotating shaft 5, two axial flow pump rotors 6 are coaxially arranged on the rotating shaft 5, the orientations of the two axial flow pump rotors 6 are opposite, two flow outlets 7 are symmetrically arranged at two sides of the cover 1, the orientation of the flow outlets 7 is perpendicular to the orientation of the flow inlet 3, a through-flow hole 8 is arranged on the bottom plate 2, and the motor 4 is connected with a cable 9 passing through the bottom plate.

Preferably, a guide plate 10 is arranged in the cover body 1, the guide plate 10 is arranged between the two axial flow pump rotors 6, a sealing washer 11 is arranged between the guide plate 10 and the rotating shaft 5, an outlet channel 12 is formed between the guide plate 10 and the outlet 7, the guide plate 10 is used for guiding blood pumped by the axial flow pump rotors 6 and separating the blood pumped by the two axial flow pump rotors 6 with opposite directions, so that liquid vortex is prevented from being generated, the stability of blood transportation is improved, and blood in upper and lower vena cava flows out through the outlet channel 12 and the two outlets 7 after being pumped by the axial flow pump rotors 6.

Preferably, the inner walls of the two ends of the cover body 1 are provided with support rods 13, the support rods 13 are provided with positioning rings 14, the rotating shaft 5 penetrates through the positioning rings 14, bearings 15 are arranged between the positioning rings 14 and the rotating shaft 5, and the support rods 13 and the positioning rings 14 are used for positioning the rotating shaft 5 and enhancing the stability of the axial flow pump rotor 6 during operation.

Preferably, the axial pump rotor 6 includes an impeller 61 and a guide vane 62, and the guide vane 62 can reduce the flow velocity of blood driven by the impeller 61 and improve the uniformity of the flow velocity of blood.

Preferably, the two ends of the cover body 1 are provided with flared suction ports 16, which can improve the flow area of blood flowing into the cover body 1 while expanding the vena cava vessel wall, and enhance the through-flow effect during blood pumping.

Preferably, the outer part of the cover body 1 is provided with two sealing rings 17, the two sealing rings 17 are respectively arranged at two sides of the outflow opening 7, the outer edge of the sealing ring 17 is provided with a flexible gasket 18, and the sealing ring 17 and the flexible gasket 18 are used for blocking the wall of the vena cava blood vessel, so that the blood flowing out from the outflow opening 7 is prevented from flowing back to the vena cava to influence the treatment effect.

Preferably, the motor 4 is an anti-reverse motor, which prevents the motor 4 from reversing when not energized, which may interfere with the blood flow in the vena cava.

Preferably, the number of the outflow openings 7 is 2-6, and the outflow openings 7 are uniformly arranged on the cover body 1 along the circumferential direction of the cover body 1, so that after the cover body 1 is inserted into a blood vessel, part of the outflow openings 7 face the pulmonary artery blood vessel, the direction of the outflow openings 7 does not need to be accurately adjusted, and the use is convenient.

Example two

As shown in fig. 1, fig. 2, fig. 4, fig. 5, fig. 6 and fig. 7, the serial axial flow pump auxiliary device for treating Fontan postoperative circulation failure includes a cylindrical cover 1, a bottom plate 2 is arranged at one end of the cover 1, a flow inlet 3 is arranged at the other end of the cover 1, a motor 4 is arranged on the bottom plate 2, an output shaft of the motor 4 is connected with a rotating shaft 5, two axial flow pump rotors 6 are coaxially arranged on the rotating shaft 5, the orientations of the two axial flow pump rotors 6 are opposite, two flow outlets 7 are symmetrically arranged at two sides of the cover 1, the orientation of the flow outlets 7 is perpendicular to the orientation of the flow inlet 3, a through-flow hole 8 is arranged on the bottom plate 2, and the motor 4 is connected with a cable 9 passing through the bottom plate.

Preferably, the inner walls of the two ends of the cover body 1 are provided with support rods 13, the support rods 13 are provided with positioning rings 14, the rotating shaft 5 penetrates through the positioning rings 14, bearings 15 are arranged between the positioning rings 14 and the rotating shaft 5, and the support rods 13 and the positioning rings 14 are used for positioning the rotating shaft 5 and enhancing the stability of the axial flow pump rotor 6 during operation.

Preferably, the axial pump rotor 6 includes an impeller 61 and a guide vane 62, and the guide vane 62 can reduce the flow velocity of blood driven by the impeller 61 and improve the uniformity of the flow velocity of blood.

Preferably, the two ends of the cover body 1 are provided with flared suction ports 16, which can improve the flow area of blood flowing into the cover body 1 while expanding the vena cava vessel wall, and enhance the through-flow effect during blood pumping.

Preferably, the motor 4 is an anti-reverse motor, which prevents the motor 4 from reversing when not energized, which may interfere with the blood flow in the vena cava.

Preferably, the flexible shaft section 19 is arranged on the rotating shaft 5 between the two axial flow pump rotors 6, the cover body 1 is a metal flexible hose, the two axial flow pump rotors 6 can be staggered at a certain angle in a blood vessel, the cover body 1 can be conveniently turned in the blood vessel, the cover body can still be used when the joint of the upper vena cava 20 and the lower vena cava 21 is not a straight line, and the applicability is improved.

Preferably, the number of the outflow openings 7 is 2-6, and the outflow openings 7 are uniformly arranged on the cover body 1 along the circumferential direction of the cover body 1, so that after the cover body 1 is inserted into a blood vessel, part of the outflow openings 7 face the pulmonary artery blood vessel, the direction of the outflow openings 7 does not need to be accurately adjusted, and the use is convenient.

The use method of the serial axial flow pump auxiliary device for treating the Fontan postoperative circulation failure comprises the following steps:

a hole is formed in a jugular vein of a patient after Fontan surgery, the cover body 1 is placed into the patient through the jugular vein or femoral vein until two ends of the cover body 1 are respectively positioned in a superior vena cava 20 and an inferior vena cava 21, an outflow port 7 is positioned in a pulmonary artery 22, and a cable 9 is positioned outside the patient and used for connecting a power supply; connecting a cable 9 with a power supply to enable a motor 4 to rotate, wherein the motor 4 drives two axial flow pump rotors 6 to rotate, and because the two axial flow pump rotors 6 are opposite in direction, blood in the superior vena cava 20 and the inferior vena cava 21 at two ends of the cover body 1 respectively enters the pulmonary artery 22 through the outflow ports 7 under the pumping of the axial flow pump rotors 6; the position of the cover body 1 is adjusted, the cable 9 is fixed outside the patient body, stable Fontan circulation is realized, and the cover body 1 is taken out of the patient body through the cable 9 after use.

In conclusion, the tandem axial flow pump auxiliary device for treating the Fontan postoperative circulatory failure and the using method thereof provided by the invention are used for auxiliary treatment after the Fontan operation, and solve the problems that in the prior art, the requirements on the stability of inflation and deflation equipment and the sealing performance of a balloon are high, pulmonary artery blood can generate reverse flow when the balloon is contracted, and the vena cava can be collapsed after long-term use, so that the blood vessel is damaged.

The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.