ventricular assist pumping device

Abstract

The present invention provides a ventricular assist blood pumping device, which relates to the field of medical device technology. The blood pumping device comprises: a pumping vessel, a pump, and a one-way valve; the pumping vessel is provided with an inlet and an outlet; the inlet is arranged in the left ventricle and / or left atrium, and the outlet is arranged in the aorta; the head end of the pumping vessel is implanted in the heart through minimally invasive surgery, and the end of the pumping vessel is connected to the pump; a one-way valve is provided in the pumping vessel, so that the outlet is closed and the inlet is open when the blood pumping device is drawing blood; and the inlet is closed and the outlet is open when blood is transfused; the blood pumping device uses the positive and negative pressures during blood transfusion and drawing to control the opening and closing of the inlet and outlet through the one-way valve, thereby achieving the function of pumping blood in the ventricle and / or atrium into the aorta, and the blood pumping device stops transfusion during blood drawing, and stops drawing blood during transfusion, and can generate pulsatile blood flow like a healthy heart, so that the patient has a normal pressure difference between systolic and diastolic blood pressure, maintaining healthy physiological functions.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a ventricular assist blood pumping device. Background Art

[0002] The heart is a vital organ that powers blood circulation throughout the body. It is divided into two parts, each containing a ventricle and an atrium. The ventricular septum blocks the connection between the left and right ventricles, while the atrial septum blocks the connection between the left and right atria. The mitral valve regulates blood flow between the left atrium and left ventricle. A healthy mitral valve ensures that oxygen-rich blood flows from the left atrium to the left ventricle, where it is then pumped into the aorta. The tricuspid valve regulates blood flow between the right atrium and right ventricle, ensuring that carbon dioxide-rich venous blood flows from the right atrium to the right ventricle, where it is then pumped into the pulmonary artery.

[0003] High-risk cardiac surgery patients and those with heart failure experience reduced cardiac pumping capacity and insufficient blood supply to the aorta, which can easily lead to systemic organ damage. Heart failure, in particular, is a serious threat to human life. Approximately one-fifth of heart disease patients worldwide will eventually develop heart failure each year. Currently, the incidence of heart failure in my country reaches 0.9%, and the five-year mortality rate exceeds 60%. For a long time, the number of patients with advanced heart failure will far exceed the number of available heart transplant donors. Ventricular assist pumps can not only save patients' lives, but also significantly assist in finding suitable donors or securing time for surgery.

[0004] However, the current ventricular assist pumping device uses a continuous constant flow pumping method, that is, it continuously pumps blood out of the ventricles and then continuously inputs the pumped blood into the aortic arch. This pumping method cannot produce pulsating blood flow like a healthy heart beating. The pressure difference between the systolic and diastolic blood pressures of the patient's blood vessels is reduced, leading to cellular metabolic disorders, changing the patient's physiological functions, and may cause the patient to suffer from stroke and acute coronary events. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present invention provides a ventricular assist blood pumping device, which solves the problem that the ventricular assist blood pumping device cannot generate pulsatile blood flow.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A ventricular assist blood pumping device, comprising: a pumping blood vessel, a pump, and a one-way valve;

[0010] The pump blood vessel is provided with an inlet and an outlet; the inlet is arranged in the left ventricle and / or the left atrium, and the outlet is arranged in the aorta;

[0011] The head end of the pump blood vessel enters the heart through minimally invasive surgery, and the end of the pump blood vessel is connected to the pump;

[0012] The blood pump is provided with a one-way valve, so that the outlet of the blood pump is closed and the inlet is open when the blood pump is drawing blood; and the inlet is closed and the outlet is open when the blood is transfused.

[0013] Preferably, the end of the pump blood vessel is connected to the pump through a blood chamber.

[0014] Preferably, the blood chamber is connected to an external blood chamber, and the external blood chamber replenishes the blood chamber with one or more of blood, peroxygenated blood, and medicine.

[0015] Preferably, the head end of the pump blood vessel is inserted from the femoral artery, passes through the aorta and enters the left ventricle and / or left atrium;

[0016] The inlet is opened at the head end of the pump blood vessel, and the outlet is opened at the wall of the aorta.

[0017] Preferably, the one-way valve comprises: a first valve plate and a wedge-shaped first sealing ring;

[0018] The bottom end of the first valve plate is rotatably connected to the pump blood vessel wall below the outlet;

[0019] The first sealing ring is arranged on the inner side of the outlet, and the first valve disc is in contact with the inner side of the first sealing ring when the first valve disc is closed, and the circumference of the first valve disc is greater than the circumference of the outer ring of the first sealing ring.

[0020] Preferably, the one-way valve comprises: a second valve disc and a third valve disc;

[0021] The second valve plate is rotatably connected to the wall of the pump blood vessel at the outlet, and the second valve plate is located outside the pump blood vessel;

[0022] The third valve disc is rotatably connected to the inner wall of the pump blood vessel below the outlet. The third valve disc is located in the pump blood vessel. A limit block is provided on the inner wall of the pump blood vessel. In the open state, the middle of the third valve disc contacts the limit block.

[0023] Preferably, the one-way valve comprises: an artificial valve;

[0024] The root of the artificial valve is fixed to the inner wall of the pump blood vessel below the outlet, and the free end of the artificial valve extends upward so that it blocks the outlet in the open state and collapses inward to expose the outlet in the closed state.

[0025] Preferably, the one-way valve comprises: an upper limit member, a lower limit member, a valve block and a branch pipe;

[0026] The upper limit member is arranged on the inner wall of the pump blood vessel above the outlet;

[0027] The lower limit member is arranged on the inner wall of the pump blood vessel below the outlet;

[0028] The valve block is located in the pump blood vessel between the upper limit member and the lower limit member;

[0029] The upper interface of the branch pipe is communicated with the pump blood vessel above the upper limit member, and the lower interface of the branch pipe is communicated with the pump blood vessel between the upper limit member and the lower limit member;

[0030] During the blood pumping process, the valve block contacts the upper limit piece, blocking the outlet, and the lower interface of the branch pipe is unobstructed;

[0031] During blood transfusion, the valve block contacts the lower limiter, blocking the pump blood vessel below the lower limiter, and the outlet is opened.

[0032] Preferably, the lower interface and outlet of the branch pipe are configured as a plurality of small holes.

[0033] Preferably, the head end of the pump blood vessel is inserted from the apex of the heart, passes through the left ventricle and then enters the aorta;

[0034] The pump blood vessel located in the left ventricle is provided with a branch tube, and the opening of the branch tube is located in the left ventricle and / or the left atrium;

[0035] A first valve is provided in the branch tube, and a second valve is provided in the pump blood vessel located above the branch tube;

[0036] The first valve opens inward, and the second valve opens outward.

[0037] Preferably, the ventricular assist pumping device is used to transport blood from the right ventricle to the pulmonary artery.

[0038] (3) Beneficial effects

[0039] The present invention provides a ventricular assist pumping device. Compared with the prior art, it has the following advantages:

[0040] In the present invention, the pump blood vessel is provided with an inlet and an outlet; the inlet is arranged in the left ventricle and / or left atrium, and the outlet is arranged in the aorta; the head end of the pump blood vessel is implanted in the heart through minimally invasive surgery, and the end of the pump blood vessel is connected to the pump; a one-way valve is provided in the pump blood vessel, so that the outlet is closed and the inlet is open when the blood pumping device draws blood; the inlet is closed and the outlet is open when blood is transfused; the blood pumping device uses the positive and negative pressures during blood transfusion and blood drawing to control the opening and closing of the inlet and outlet through the one-way valve, thereby realizing the function of pumping the blood in the ventricle and / or atrium into the aorta, and the blood pumping device stops transfusing blood during blood drawing, and stops drawing blood during blood transfusion, and can generate pulsating blood flow like a healthy heart, so that the patient has a normal pressure difference between systolic and diastolic blood pressure, and maintains healthy physiological functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a schematic diagram of the working principle of the blood pumping device in Example 1 of the present invention;

[0043] Figure 2 This is a schematic diagram of the assembly of the blood pumping device in Example 1 of the present invention;

[0044] Figure 3 Schematic diagram of the working principle of the blood pumping device in Example 2 of the present invention;

[0045] Figure 4 This is a schematic diagram of the working principle of the blood pumping device in Example 3 of the present invention;

[0046] Figure 5 This is a schematic diagram of the working principle of the blood pumping device in Example 4 of the present invention;

[0047] Figure 6 This is a schematic diagram of the blood pumping state of the blood pumping device in Example 5 of the present invention;

[0048] Figure 7 This is a schematic diagram of the blood transfusion state of the blood pumping device in Example 5 of the present invention. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] The embodiment of the present application solves the problem that the ventricular assist pumping device cannot generate pulsatile blood flow by providing a ventricular assist pumping device.

[0051] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0052] In an embodiment of the present invention, a pump blood vessel is provided with an inlet and an outlet; the inlet is arranged in the left ventricle and / or left atrium, and the outlet is arranged in the aorta; the head end of the pump blood vessel is implanted in the heart through minimally invasive surgery, and the end of the pump blood vessel is connected to the pump; a one-way valve is provided in the pump blood vessel, so that the outlet is closed and the inlet is open when the blood pumping device draws blood; the inlet is closed and the outlet is open during blood transfusion; the blood pumping device uses the positive and negative pressures during blood transfusion and blood drawing to control the opening and closing of the inlet and outlet through the one-way valve, thereby realizing the function of pumping the blood in the ventricle and / or atrium into the aorta, and the blood pumping device stops transfusing blood during blood drawing, and stops drawing blood during blood transfusion, and can generate pulsating blood flow like a healthy heart, so that the patient has a normal pressure difference between systolic and diastolic blood pressure, and maintains healthy physiological functions.

[0053] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0054] Example 1:

[0055] like Figure 1 、 Figure 2 As shown, the present invention provides a ventricular assist blood pumping device, which includes: a pumping blood vessel 10, a pump 20 and a one-way valve;

[0056] The pump blood vessel 10 is provided with an inlet 11 and an outlet 12; the inlet 11 is provided in the left ventricle and / or the left atrium, and the outlet 12 is provided in the aorta;

[0057] The head end of the pump blood vessel 10 enters the heart through minimally invasive surgery, and the end of the pump blood vessel 10 is connected to the pump 20;

[0058] The pump blood vessel 10 is provided with a one-way valve, so that the outlet 12 is closed and the inlet 11 is opened when the blood pumping device draws blood; and the inlet 11 is closed and the outlet 12 is opened when the blood is transfused.

[0059] The blood pumping device utilizes the positive and negative pressures during blood transfusion and blood withdrawal to control the opening and closing of the inlet 11 and the outlet 12 through a one-way valve, thereby achieving the function of pumping blood in the ventricles and / or atria into the aorta. The blood pumping device stops transfusing blood during blood withdrawal, and stops drawing blood during blood transfusion. It can generate pulsating blood flow like a healthy heart, so that the patient has healthy systolic and diastolic blood pressures and maintains healthy physiological functions.

[0060] like Figure 1 、 Figure 2 As shown, the end of the pump blood vessel 10 is connected to the pump 20 through a blood chamber 21, and the blood chamber 21 is used to accommodate the pumped blood.

[0061] The blood chamber 21 is connected to an external blood chamber, and the external blood chamber replenishes the blood chamber 21 with one or more of blood, peroxygenated blood, and medicine.

[0062] like Figure 2 As shown, the head end of the pump blood vessel 10 is inserted from the femoral artery, passes through the aorta and enters the left ventricle and / or left atrium;

[0063] The inlet 11 is opened at the head end of the pump blood vessel 10, and the outlet 12 is opened at the wall of the aorta.

[0064] like Figure 1 As shown, the one-way valve includes: a first valve plate 30 and a wedge-shaped first sealing ring 31;

[0065] The bottom end of the first valve plate 30 is rotatably connected to the wall of the pump blood vessel 10 below the outlet 12;

[0066] The first sealing ring 31 is arranged inside the outlet 12. When the first valve disc 30 is closed, it fits against the inner side of the first sealing ring 31. The circumference of the first valve disc 30 is greater than the outer circumference of the first sealing ring 31.

[0067] During the blood pumping process, the first valve plate 30 is fitted with the first sealing ring 31 under the action of blood pressure, so that the outlet 12 is closed, thereby pumping out the blood in the left ventricle and / or left atrium;

[0068] During blood transfusion, the first valve plate 30 flips inwards under the action of blood pressure, blocking the pump blood vessel 10 below the outlet 12, and the outlet 12 is opened, thereby transfusing blood into the aorta.

[0069] Example 2:

[0070] like Figure 3 As shown, the one-way valve includes: a second valve disc 32 and a third valve disc 33;

[0071] The second valve plate 32 is rotatably connected to the wall of the pump blood vessel 10 at the outlet 12, and the second valve plate 32 is located outside the pump blood vessel 10;

[0072] The third valve disc 33 is rotatably connected to the inner wall of the pump blood vessel 10 below the outlet 12. The third valve disc 33 is located in the pump blood vessel 10. A limit block 13 is provided on the inner wall of the pump blood vessel 10. In the open state, the middle of the third valve disc 33 contacts the limit block 13 to prevent the third valve disc 33 from adhering to the inner wall of the pump blood vessel 10 and preventing it from closing.

[0073] During the blood pumping process, the third valve disc 33 is opened by the blood pressure, and the second valve disc 32 is adsorbed by the negative pressure to close the outlet 12, thereby pumping out the blood in the left ventricle and / or left atrium;

[0074] During blood transfusion, the third valve disc 33 flips inward under the action of blood pressure, blocking the pump blood vessel 10 below the outlet 12. The second valve disc 32 is pushed open by the blood pressure, and the outlet 12 is opened, thereby infusing blood into the aorta.

[0075] Example 3:

[0076] like Figure 4 As shown, the one-way valve includes: an artificial valve 34;

[0077] The root of the artificial valve 34 is fixed to the inner wall of the pump blood vessel 10 below the outlet 12, and the free end of the artificial valve 34 extends upward so that it blocks the outlet 12 in the open state, and collapses inward to expose the outlet 12 in the closed state.

[0078] During the blood pumping process, the artificial valve 34 opens and the outlet 12 is blocked, thereby pumping out the blood in the left ventricle and / or left atrium;

[0079] During blood transfusion, the artificial valve 34 closes under the action of blood pressure, closing the pump blood vessel 10 below the outlet 12, and the outlet 12 opens, thereby infusing blood into the aorta.

[0080] Example 4:

[0081] like Figure 5 As shown, the one-way valve includes: an upper limit member 35, a lower limit member 36, a valve block 37 and a branch pipe 38;

[0082] The upper limit member 35 is arranged on the inner wall of the pump blood vessel 10 above the outlet 12;

[0083] The lower limit member 36 is provided on the inner wall of the pump blood vessel 10 below the outlet 12;

[0084] The valve block 37 is located in the pump blood vessel 10 between the upper limit member 35 and the lower limit member 36;

[0085] The upper interface of the branch pipe 38 is communicated with the pump blood vessel 10 above the upper limit member 35, and the lower interface of the branch pipe 38 is communicated with the pump blood vessel 10 between the upper limit member 35 and the lower limit member 36;

[0086] During the blood pumping process, the valve block 37 contacts the upper limit member 35 under the action of negative pressure, blocking the outlet 12, and the lower interface of the branch pipe 38 is unblocked, and the blood is pumped out through the branch pipe 38;

[0087] During blood transfusion, the valve block 37 contacts the lower limiter 36 under the action of positive pressure, blocking the pump blood vessel 10 below the lower limiter 36, and the outlet 12 is opened, thereby transfusing blood into the aorta.

[0088] The lower interface and the outlet 12 of the branch pipe 38 are provided with a plurality of small holes (eg mesh) to prevent the valve block 37 from being stuck or caught by the lower interface or the outlet 12 of the branch pipe 38 .

[0089] Example 5:

[0090] like Figure 6 、 Figure 7 As shown, the head end of the pump blood vessel 10 is inserted from the apex of the heart, passes through the left ventricle and enters the aorta;

[0091] The pump blood vessel 10 located in the left ventricle is provided with a branch tube 14 , the opening of the branch tube 14 being located in the left ventricle and / or the left atrium;

[0092] A first valve 15 is provided in the branch tube 14 , and a second valve 16 is provided in the pump blood vessel 10 located above the branch tube 14 ;

[0093] The first valve 15 opens inward, and the second valve 16 opens outward.

[0094] During the blood pumping process, the first valve 15 opens and the second valve 16 closes, thereby pumping out the blood in the left ventricle and / or left atrium;

[0095] During blood transfusion, the first valve 15 is closed and the second valve 16 is opened, thereby transfusing blood into the aorta.

[0096] Example 6:

[0097] The ventricular assist pumping device is used to transport blood from the right ventricle to the pulmonary artery.

[0098] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0099] In an embodiment of the present invention, a pump blood vessel is provided with an inlet and an outlet; the inlet is arranged in the left ventricle and / or left atrium, and the outlet is arranged in the aorta; the head end of the pump blood vessel is implanted in the heart through minimally invasive surgery, and the end of the pump blood vessel is connected to the pump; a one-way valve is provided in the pump blood vessel, so that the outlet is closed and the inlet is open when the blood pumping device draws blood; the inlet is closed and the outlet is open during blood transfusion; the blood pumping device uses the positive and negative pressures during blood transfusion and blood drawing to control the opening and closing of the inlet and outlet through the one-way valve, thereby realizing the function of pumping the blood in the ventricle and / or atrium into the aorta, and the blood pumping device stops transfusing blood during blood drawing, and stops drawing blood during blood transfusion, and can generate pulsating blood flow like a healthy heart, so that the patient has a normal pressure difference between systolic and diastolic blood pressure, and maintains healthy physiological functions.

[0100] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A ventricular assist pumping device, characterized in that: The blood pumping device comprises: a pumping blood vessel (10), a pump (20) and a one-way valve; The pump blood vessel (10) is provided with an inlet (11) and an outlet (12); The head end of the pump blood vessel (10) enters the heart through minimally invasive surgery, and the tail end of the pump blood vessel (10) is connected to the pump (20); The pump blood vessel (10) is provided with a one-way valve; the one-way valve comprises: an upper limit member (35), a lower limit member (36), a valve block (37) and a branch pipe (38); The upper limit member (35) is arranged on the inner wall of the pump blood vessel (10) above the outlet (12); The lower limit member (36) is arranged on the inner wall of the pump blood vessel (10) below the outlet (12); The valve block (37) is located in the pump blood vessel (10) between the upper limit member (35) and the lower limit member (36); The branch pipe (38) is arranged on the side wall of the pump blood vessel (10), the upper interface of the branch pipe (10) is communicated with the pump blood vessel (10) above the upper limit member (35), and the lower interface of the branch pipe (38) is communicated with the pump blood vessel (10) located between the upper limit member (35) and the lower limit member (36); During the blood pumping process, the valve block (37) contacts the upper limit member (35), blocks the outlet (12), and the lower interface of the branch pipe (38) is unblocked; blood flows from the ventricle and / or atrium through the pumping blood vessel (10) between the upper limit member (35) and the lower limit member (36), the branch pipe (38), and the pumping blood vessel (10) above the upper limit member (35) into the blood chamber; During the blood transfusion process, the valve block (37) contacts the lower limiter (36), blocking the pump blood vessel (10) below the lower limiter (36), and the outlet (12) is opened; blood flows out from the blood chamber through the pump blood vessel (10) above the upper limiter (35), the pump blood vessel (10) between the upper limiter (35) and the lower limiter (36), the branch pipe (38), and the outlet (12).

2. The ventricular assist pumping device according to claim 1, wherein: The inlet (11) is arranged in the left ventricle and / or the left atrium, and the outlet (12) is arranged in the aorta.

3. The ventricular assist pumping device according to claim 1, wherein: The end of the pump blood vessel (10) is connected to the pump (20) through the blood chamber (21).

4. The ventricular assist pumping device according to claim 3, wherein: The blood chamber (21) is connected to an external blood chamber, and the external blood chamber replenishes the blood chamber (21) with one or more of blood, peroxygenated blood, and medicine.

5. The ventricular assist pumping device according to claim 2, wherein: The head end of the pump blood vessel (10) is inserted from the femoral artery, passes through the aorta and enters the left ventricle and / or left atrium; The inlet (11) is opened at the head end of the pump blood vessel (10), and the outlet (12) is opened at the wall of the aorta.

6. The ventricular assist pumping device according to claim 1, wherein: The lower interface and the outlet (12) of the branch pipe (38) are configured as a plurality of small holes.

7. The ventricular assist pumping device according to claim 1, wherein: The ventricular assist pumping device is used to transport blood from the right ventricle to the pulmonary artery.

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