CN111840682A - A blood pump for improving coronary blood supply - Google Patents

Abstract

The invention relates to the field of medical treatment, and particularly discloses a blood pump beneficial to improving coronary blood supply, which comprises an artificial blood vessel and a first pump body arranged in the artificial blood vessel and used for pumping blood, wherein two ends of the artificial blood vessel are opened, one end of the artificial blood vessel is a near-end mouth part used for being connected to the root part of an aorta, a coronary connecting part used for being connected with a coronary artery and a fluid blocking body used for blocking blood flow are sequentially arranged on the artificial blood vessel above the near-end mouth part, and the blood flow blocked by the fluid blocking flows back to the coronary connecting part. The blood pump is of a structure with an artificial blood vessel arranged inside, and the blood pump can be installed by replacing a corresponding aorta area during operation, so that the complexity of the operation is reduced, and the operation wound is reduced; because the flow blocking body is additionally arranged in the artificial blood vessel, when the pump body works, pumped blood flows in the artificial blood vessel, partial blood flows back under the blockage of the flow blocking body and flows into coronary artery through the coronary artery connecting part, the blood supply of the coronary artery is greatly improved, and therefore sufficient blood is provided for cardiac muscle.

Description

A blood pump for improving coronary blood supply

technical field

The invention relates to the medical field, in particular to a blood pump which is beneficial to improving coronary blood supply.

Background technique

Left Ventricular Assist Devices System (LVADS) is mainly used to treat patients with coronary atherosclerotic heart disease, hypertensive heart disease, cardiomyopathy and other congestive heart failure; A device that extracts the left ventricle from the left ventricle and is pressurized and transported to the aorta by a blood pump to partially or completely replace the heart function to maintain blood circulation; at present, the blood pump that constructs this system is mainly installed at the apex of the left ventricle of the patient, which is not only complicated and traumatic for the operation. Large, high bleeding risk, and most of the blood pumped from the blood pump flows to the distal end, which severely reduces coronary blood flow, leads to myocardial ischemia in patients, and even causes sudden death in severe cases.

Therefore, in order to solve the above-mentioned problems, there is a need for a blood pump that is beneficial to improve coronary blood supply.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a blood pump that is beneficial for improving coronary blood supply.

In order to achieve the above purpose, the present invention provides a blood pump that is conducive to improving coronary blood supply, including an artificial blood vessel and a first pump body arranged in the artificial blood vessel for pumping blood, the two ends of the artificial blood vessel are open and one end is open. In order to connect to the proximal port portion of the aortic root, the artificial blood vessel is provided with a coronary artery connecting portion for connecting with coronary arteries and a bluff body for blocking blood flow in sequence above the proximal port portion, and is subject to The bluff body blocks blood flow back to the coronary junction.

As a further improvement of the technical solution of the present invention, the coronary artery connecting portion includes two connecting holes respectively opened on the left and right sides of the artificial blood vessel.

As a further improvement of the technical solution of the present invention, an artificial coronary anastomosis blood vessel used for anastomosis with human coronary arteries is connected to the connecting hole.

As a further improvement of the technical solution of the present invention, the bluff body is in the shape of a hollow tube and its outer wall is fixed on the inner wall of the artificial blood vessel, and a blood flow conduit coaxial with the artificial blood vessel is arranged in the bluff body; the bottom of the bluff body is an inclined plane , and the inclined plane is inclined toward the central axis of the artificial blood vessel from top to bottom.

As a further improvement of the technical solution of the present invention, the inclined surface and the inner wall of the bluff body are connected by a smooth transition.

As a further improvement of the technical solution of the present invention, the artificial blood vessel includes a first tube body and a second tube body, the first tube body is in a ball-band structure, and the proximal port portion and the coronary artery connecting portion are both arranged on the first tube body. A pipe body, the second pipe body is in a round pipe structure and the lower end of the second pipe body is butted with the upper end of the first pipe body, and the diameter of the second pipe body is smaller than the diameter of the first pipe body.

As a further improvement of the technical solution of the present invention, the lower end of the proximal port portion is also connected with a sewing ring for suturing with the aortic valve annulus.

As a further improvement of the technical solution of the present invention, the first pump body is fixed at the proximal port and includes a pump housing and a mounting bracket arranged in the pump housing, and a rotating shaft coaxial with the artificial blood vessel is rotatably connected to the mounting bracket. , an impeller is fixed on the rotating shaft, a driver for driving the rotating shaft to rotate is installed on the mounting bracket, and the driver is connected to a controller located outside the artificial blood vessel through a wire.

As a further improvement of the technical solution of the present invention, a second pump body is provided in the blood flow conduit.

As a further improvement of the technical solution of the present invention, the second pump body includes a rotor cylinder disposed in the blood flow conduit and coaxially arranged with the blood flow conduit and rotor blades fixed on the inner wall of the rotor cylinder. A permanent magnet is embedded in the outer wall of the bluff body, and an electromagnetic drive coil for driving the rotation of the rotor cylinder is also installed in the tube wall of the bluff body. The electromagnetic drive coil is connected to a controller located outside the artificial blood vessel through a wire, and the controller controls The magnitude and direction of the current in the electromagnetic drive coils to generate an alternating magnetic field that cooperates with the permanent magnets to drive the rotor cylinder to rotate.

Compared with the prior art, the present invention can have the following beneficial technical effects:

First, the blood pump of the present invention is a structure in which an artificial blood vessel is built, and the blood pump can be installed by replacing the corresponding aortic area during operation, which reduces the complexity of the operation, reduces the surgical trauma, and greatly reduces the pain of the patient;

Second, the blood pump of the present invention adds a bluff body in the artificial blood vessel. When the blood pumped by the pump body flows in the artificial blood vessel, part of the blood is blocked by the blister body and flows back, and flows into the coronary arteries connection part. Coronary artery, greatly improving coronary blood supply, thus providing sufficient blood for the myocardium, effectively preventing the occurrence of myocardial ischemia accidents in patients;

Third, the blood pump of the present invention has a structure of double pump bodies, which can not only effectively improve the blood pumping efficiency, but also the first pump body and the second pump body also play a redundant role with each other, which improves the safety and effectiveness of use. sex;

Fourth, in some improvement schemes, the artificial blood vessel is prefabricated with a connecting hole connected to the coronary artery and an artificial coronary anastomosis blood vessel, which facilitates the rapid anastomosis of the coronary artery and effectively improves the operation efficiency.

Description of drawings

Fig. 1 is the structural representation of the present invention;

FIG. 2 is an enlarged view of part A in FIG. 1 .

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments; product restrictions.

Example

As shown in Figures 1 and 2, the arrows in Figure 1 are schematic diagrams of blood flow during use: this embodiment provides a blood pump that is conducive to improving coronary blood supply, including an artificial blood vessel 1 and an artificial blood vessel 1. The first pump body for pumping blood, the artificial blood vessel 1 is open at both ends and one end is a proximal port 1a for connecting to the aortic root, and the artificial blood vessel 1 is located above the proximal port 1a Coronary arteries connecting parts for connecting with coronary arteries and bluff bodies 2 for blocking blood flow are provided in sequence (from bottom to top), and the blood flow blocked by the blister bodies 2 flows back to the coronary arteries connecting parts.

The material of the artificial blood vessel 1 is the same as that in the prior art, for example, it can be sewn with medical polyester or polytetrafluoroethylene fabric; the artificial blood vessel 1 can be similar in structure to the valved pipe used in bentall surgery, but does not need to set artificial blood vessels. Instead, you can choose to replace it with the first pump body; the overall installation method of the blood pump can also refer to the bentall operation, as long as the patient's non-functional aortic valve is removed during the operation, leaving the aortic valve annulus, and the artificial blood vessel 1 The proximal port portion 1a is installed at the root of the aorta, and the distal port portion is installed at the disconnected end of the aorta, and then the human coronary arteries are anastomosed to the coronary arteries connection portion. The first pump body can adopt various existing pump structures, such as centrifugal pump, axial flow pump, etc., as long as it can play the role of pumping blood, and its position in the artificial blood vessel 1 can also be determined as required. "Up" and "Down" are subject to the method shown in Figure 1.

The blood pump of this embodiment is a structure built into the artificial blood vessel 1, and the blood pump can be installed by replacing the corresponding aortic area during the operation, which reduces the complexity of the operation, reduces the surgical trauma, and greatly reduces the pain of the patient; Since the blood pump of the present embodiment is provided with a bluff body 2 in the artificial blood vessel 1, when the blood pumped by the pump body flows in the artificial blood vessel 1, part of the blood is blocked by the blister body 2 and flows back, and passes through the coronary artery. The connecting part flows into the coronary artery, which greatly improves the blood supply of the coronary artery, thereby providing sufficient blood for the myocardium, and effectively preventing the accident of myocardial ischemia in the patient.

In this embodiment, the coronary artery connecting portion includes two connecting holes 3 respectively opened on the left and right sides of the artificial blood vessel 1; “left” and “right” are based on the directions shown in FIG. 1; The round hole for coronary suture anastomosis can be made into a variety of different diameters to suit specific patients; the pre-set connection hole 3 can facilitate the surgical operation, and ensure the molding degree of the connection hole 3 to improve the surgical effect; further In addition, the connection hole 3 can also be connected to the artificial coronary anastomosis blood vessel 4 used for anastomosis with the coronary artery of the human body, and the human coronary artery can be directly anastomosed with the artificial coronary anastomosis blood vessel 4 during the operation, so as to realize rapid coronary anastomosis. anastomosis to further improve surgical efficiency. Of course, in the case where the connecting hole 3 and the artificial coronary anastomosis vessel 4 are not provided, the operator needs to open a through hole in the coronary connecting portion of the artificial vessel 1 suitable for the coronary artery of the patient during the operation.

In this embodiment, the bluff body 2 is in the shape of a hollow tube and its outer wall is fixed on the inner wall of the artificial blood vessel 1. The blister body 2 is provided with a blood flow conduit 2a coaxial with the artificial blood vessel 1; It is an inclined surface 2b, and the inclined surface 2b is inclined from top to bottom toward the central axis of the artificial blood vessel 1; the bluff body 2 can be made of medical plastic or medical metal, and can be fixed in the artificial blood vessel 1 by edge stitching; The diameter of the flow conduit 2a can be, for example, 1/2-3/4 of the diameter of the artificial blood vessel 1; the bluff body 2 is a gyratory structure as a whole, and the inclined surface 2b at the bottom is a structure inclined from top to bottom and from outside to inside to form The blocking of part of the blood flow causes the part of blood to flow in the direction of the side wall of the artificial blood vessel 1 and enter the connecting hole 3 . At the same time, in order to reduce the damage to the blood, the inclined surface is connected with the inner wall of the bluff body 2 in a smooth transition; A blood clot is created by creating an area of blood stagnation. Since the artificial blood vessel 1 is a bendable structure, "coaxial" refers to when it is in a straight tube state.

In this embodiment, the artificial blood vessel 1 includes a first tube body 11 and a second tube body 12, the first tube body 11 is in a ball-band structure, and the proximal port portion 1a and the coronary artery connecting portion are both disposed on the first tube body 11. A pipe body 11 , the second pipe body 12 has a round pipe structure and the lower end of the second pipe body 12 is butted with the upper end of the first pipe body 11 , and the diameter of the second pipe body 12 is smaller than the diameter of the first pipe body 11 . The ball belt structure is the part where the spherical surface is sandwiched between two parallel sections, and its diameter is the inner diameter of the original spherical surface; this structure is used to facilitate the connection with the aortic root, increase the operating area when the human coronary artery is connected, and the first tube body The transition position between 11 and the second tube body 12 naturally forms the blocking and drainage of blood, which can increase coronary blood supply; the diameter of the second tube body 12 can be 1/2-4/5 of the diameter of the first tube body 11; The first pipe body 11 and the second pipe body 12 may be integrally provided.

In this embodiment, the lower end of the proximal port 1a is also connected with a sewing ring 4 for suturing with the aortic valve annulus; the sewing ring 4 can be formed by extending the artificial blood vessel 1 downward and folded outward; 4. The connection between the artificial blood vessel 1 and the aortic root can be realized, which can improve the operation efficiency.

In this embodiment, the first pump body fixed at the proximal port portion 1a includes a pump housing 51 and a mounting bracket 52 arranged in the pump housing 51 , and the mounting bracket 52 is rotatably connected with a coaxial tube coaxial with the artificial blood vessel 1 . A rotating shaft 53 , an impeller 54 is fixed on the rotating shaft 53 , a driver 55 for driving the rotating shaft 53 to rotate is installed on the mounting bracket 52 , and the driver 55 is connected to the controller 8 located outside the artificial blood vessel 1 through a wire 7 . The pump housing 51 can be fixed on the proximal port portion 1a by way of edge stitching; the mounting bracket 52 can be composed of upper and lower struts, in a "C" shape, and the impeller 54 is located between the upper and lower struts; the driver 55 can be, for example, It is a micro motor, and its output shaft is connected with the rotating shaft 53 in a drive; the wire 7 can be led out of the human body, and the controller 8 and the power supply 9 can be set outside the body at this time, and of course it can also be the existing structure embedded in the human skin; When the impeller 54 rotates, a negative pressure is generated to drive blood flow. This structure and principle are the same as those of the prior art; the first pump body is fixed at the proximal port portion 1a, that is, under the coronary artery connection portion, so as to provide blood for entering the coronary artery. more power.

In this embodiment, the blood flow conduit 2a is also provided with a second pump body, so that the blood pump of this embodiment constitutes a structure of double pump bodies, which can not only effectively improve the blood pumping efficiency, but also the first pump body and the second pump body. The two pump bodies also play a redundant role with each other, which improves the safety and effectiveness of use.

Wherein, the second pump body may have the same structure as the first pump body, and of course other structures may also be used. Preferably, the second pump body includes a rotor cylinder 61 arranged in the blood flow conduit 2a and coaxially arranged with the blood flow conduit 2a, and a rotor blade 62 fixed on the inner wall of the rotor cylinder 61. The rotor cylinder 61 A permanent magnet 63 is embedded in the outer wall of the bluff body 2, and an electromagnetic drive coil 64 for driving the rotor cylinder 61 to rotate is also installed in the tube wall of the bluff body 2. The electromagnetic drive coil 64 is connected to the control outside the artificial blood vessel 1 through the wire 7 The controller 8 controls the magnitude and direction of the current in the electromagnetic drive coil 64 to generate an alternating magnetic field that cooperates with the permanent magnet 63 to drive the rotor cylinder 61 to rotate. At this time, the tube wall of the bluff body 2 is provided with a rotor installation groove and a bearing installation groove located at both ends of the rotor installation groove and communicated with the rotor installation groove. In the groove, and after installation, the inner wall of the rotor cylinder 61 is flush with the tube wall of the bluff body 2; the tube wall of the bluff body 2 is also provided with a coil installation slot and a wire passage connected with the coil installation slot, and the electromagnetic The drive coil 64 is fixed in the coil installation slot, and the wire 7 is inserted into the wire hole to be connected with the electromagnetic drive coil 64; the electromagnetic drive coil 64 and the permanent magnet 63 form a magnetically coupled drive structure, which is the prior art and will not be repeated here. Repeat; under the control of the controller 8, the rotational speed and the rotation direction of the rotor cylinder 61 can be adjusted as required; the same as the first pump body, the controller 8 and the power supply 9 can be installed outside the body, and of course they can also be existing In the structure embedded in human skin, the second pump body and the first pump body can share the controller 8 and the power supply 9 . The rotor blade 62 is preferably a helical blade structure, and a spiral blood flow channel is formed between the side wall of the rotor blade 62 and the inner wall of the bluff body 2. When the rotor blade 62 rotates, the blood enters the spiral blood flow channel and accelerates in the flow channel. Delivery, it is beneficial to reduce the damage to the blood and increase the blood flow rate.

Finally, it should be noted that this article uses specific examples to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the core idea of the present invention. Without departing from the principles of the present invention, the Several improvements and modifications have been made to the present invention, which also fall within the scope of protection of the present invention.

Claims (10)

1. The utility model provides a do benefit to blood pump that improves coronary blood supply which characterized in that: including artificial blood vessel and establish the first pump body that is used for pump sending blood in artificial blood vessel, artificial blood vessel's both ends opening and one end are for being used for being connected to the near-end oral area of aorta root, the top that lies in near-end oral area on the artificial blood vessel is equipped with in proper order and is used for the coronary artery connecting portion of being connected with the coronary artery and is used for blockking the bluff body that blood flows, and receives the blood flow that the bluff body blockked flows back to coronary artery connecting portion.

2. The blood pump of claim 1, wherein said blood pump is adapted to facilitate improved coronary blood supply: the coronary artery connecting part comprises two connecting holes which are respectively arranged at the left side and the right side of the artificial blood vessel.

3. The blood pump of claim 2, wherein said blood pump is adapted to facilitate improved coronary blood supply: the connecting hole is connected with a coronary artery artificial anastomosis blood vessel which is used for anastomosing with the coronary artery of the human body.

4. The blood pump of claim 1, wherein said blood pump is adapted to facilitate improved coronary blood supply: the flow blocking body is in a hollow tubular shape, the outer wall of the flow blocking body is fixed on the inner wall of the artificial blood vessel, and a blood flow pipeline coaxial with the artificial blood vessel is arranged in the flow blocking body; the bottom of the flow blocking body is an inclined plane, and the inclined plane inclines towards the central axis of the artificial blood vessel from top to bottom.

5. The blood pump of claim 4, wherein said blood pump is adapted to facilitate improved coronary blood supply by: the inclined plane is in smooth transition connection with the inner wall of the flow blocking body.

6. The blood pump of claim 1, wherein said blood pump is adapted to facilitate improved coronary blood supply: the artificial blood vessel comprises a first tube body and a second tube body, wherein the first tube body is of a spherical belt structure, the near-end opening part and the coronary artery connecting part are arranged on the first tube body, the second tube body is of a circular tube structure, the lower end of the second tube body is in butt joint with the upper end of the first tube body, and the diameter of the second tube body is smaller than that of the first tube body.

7. The blood pump of claim 1, wherein said blood pump is adapted to facilitate improved coronary blood supply: the lower end of the proximal port is also connected with a suture ring for suturing with the aortic valve annulus.

8. The blood pump of claim 1, wherein said blood pump is adapted to facilitate improved coronary blood supply: the utility model discloses a pump, including pump shell, first pump body, installation support, impeller, driver, first pump body is fixed in near-end oral area department and includes pump shell and establish the installing support in pump shell, rotate in the installing support and be connected with the coaxial pivot with artificial blood vessel, be fixed with the impeller in the pivot, install the driver that is used for driving the pivot rotation on the installing support, the driver passes through the controller that the wire connection is located artificial blood vessel outside.

9. The blood pump of claim 4, wherein said blood pump is adapted to facilitate improved coronary blood supply by: and a second pump body is arranged in the blood flow pipeline.

10. The blood pump for improving coronary blood supply of claim 9, wherein: the second pump body comprises a rotor cylinder and rotor blades, the rotor cylinder is arranged in the blood flow pipeline and is coaxial with the blood flow pipeline, the rotor blades are fixed on the inner wall of the rotor cylinder, a permanent magnet is embedded in the outer wall of the rotor cylinder, an electromagnetic driving coil used for driving the rotor cylinder to rotate is further installed in the wall of the flow blocking body, the electromagnetic driving coil is connected with a controller located outside the artificial blood vessel through a lead, and the controller controls the size and the direction of current in the electromagnetic driving coil to generate an alternating magnetic field matched with the permanent magnet to drive the rotor cylinder to rotate.

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