External blood power assisting device

Abstract

The invention relates to an in-vitro blood power assisting device which comprises a device shell arranged on one side of a corresponding limb during use, and a first pressing head, a second pressing head and a third pressing head which are arranged in sequence in the blood trend of a target blood vessel and can act independently are arranged on the device shell. Each pressing head is inflated with a medium to press a target blood vessel, or the pressing head presses the target blood vessel through up-down translation. The power assisting device solves the technical problems that in the prior art, in the working process of a power assisting device, the gravity center of limbs fluctuates, and more energy is lost in the power assisting process.

Description

Technical Field

[0001] The present invention relates to the field of medical qi and blood technology, and in particular to an extracorporeal blood booster device. Background Art

[0002] The principle of blood flow in the human body is that blood is pumped out from the heart, flows through the arteries to the capillaries of the tissues; from the capillaries of the tissues, it gathers into the veins, and then flows back to the heart from the veins.

[0003] When the heart is not supplied with enough blood, or blood vessels are blocked, resulting in insufficient blood supply to the heart, appropriate auxiliary devices are needed to ensure blood supply.

[0004] A common auxiliary device is the external counterpulsation, which is a method of non-invasively pressing the lower body limbs externally to relieve and eliminate angina symptoms and improve the hypoxic-ischemic state of important organs of the body. It is also a medical device used to prevent and treat cardiovascular and cerebrovascular diseases. It is a balloon wrapped around the limbs and buttocks. During the diastole of the heart, the balloon is inflated and pressurized to drive the blood in the limb arteries back to the aorta, significantly increase the diastolic pressure, increase blood flow to the heart, and reduce the afterload of the heart; during the systole of the heart, the balloon is quickly deflated, the pressure is relieved, the systolic pressure in the aorta is reduced, the resistance of the heart during the ejection phase is reduced to the maximum, and the blood is accelerated to flow to the distal end, thereby achieving the counterpulsation effect.

[0005] The structure of the existing extracorporeal counterpulsation device is a circular airbag mounted on the patient's lower limbs. By inflating the circular airbag, the circular airbag squeezes the blood vessels, thereby achieving the purpose of assisting the blood in the blood vessels. The problems with this extracorporeal counterpulsation device are: 1. When the circular airbag is deflated, the height of the limb will drop, and when it is inflated, the height of the limb will rise, that is, the center of gravity of the limb is constantly changing, which will cause discomfort to the patient and affect the patient's heart rate changes; 2. When the circular airbag is inflated, more gas is required, which will affect its working frequency and cause more gas waste; 3. When the circular airbag is inflated, the airbag squeezes the blood vessels somewhere in the limbs, and the blood in the blood vessels will flow upstream and downstream of the blood vessels respectively. Only the blood flowing downstream can get real assistance, and the blood flowing upstream will offset the blood pumped out by the heart, that is, only half of the work done by the circular airbag is useful, which leads to the circular airbag. Summary of the invention

[0006] The purpose of the present invention is to provide an extracorporeal blood booster to solve the technical problems in the prior art that the center of gravity of the limbs may fluctuate during operation and that a large amount of energy may be lost during the boosting process.

[0007] In order to solve the above technical problems, the technical solution of an extracorporeal blood booster device in the present invention is as follows: An extracorporeal blood booster device comprises a device shell which is placed on one side of a corresponding limb when in use, and a first pressing head, a second pressing head and a third pressing head which are arranged in sequence along the blood flow of a target blood vessel and can act independently. Each pressing head presses the target blood vessel by expanding by filling a medium inside, or by moving the pressing head up and down.

[0008] Furthermore, the device shell is a cover-shaped structure with an opening at the bottom, and the lower end of the device shell is provided with at least one circle of sealing matching parts for sealing with the patient's skin, and a negative pressure suction port is provided on the device shell.

[0009] Furthermore, the sealing mating part is a vacuum suction cup structure.

[0010] Furthermore, the length of the second pressing head is greater than the length of the first pressing head, and the length of the second pressing head is greater than the length of the third pressing head.

[0011] Furthermore, each pressing head is a sac-like structure made of elastic material, and each pressing head is expanded by filling a medium inside to press the target blood vessel.

[0012] Furthermore, the medium is a gas medium or a liquid medium.

[0013] Furthermore, each pressing head is provided with a medium inlet and outlet, and a switch valve is connected to the medium inlet and outlet.

[0014] The beneficial effects of the present invention are as follows: in the present invention, the first pressing head and the third pressing head are used as valve structures for blood vessels, and their main function is to close the target blood vessel, and the second pressing head is used to pump the blood vessel. When it is used, the pressing device is set on one side of the patient's limb, the third pressing head is used to press the target blood vessel to close the downstream position of the pressing section of the target blood vessel, and the first pressing head is used to press the target blood vessel to close the upstream position of the pressing section of the target blood vessel. When the third pressing head does not press the target blood vessel, the first pressing head presses the target blood vessel, and the second pressing head presses the target blood vessel between the first pressing head and the second pressing head, so that the blood in the blood vessel section obtains a certain pressure, and the blood will flow downstream under the pressure, thereby playing the role of pumping blood in vitro, and the first pressing head prevents the blood from flowing upstream, so that the pressure loss problem caused by the pressure blood flowing upstream can be avoided, and the work done by the second pressure head is guaranteed to be effective. At the same time, the entire pressing device is only arranged on one side of the patient's limb, and will not cause the rise and fall of the center of gravity of the limb during operation, thereby reducing the impact on the patient and the loss of invalid power. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals denote the same or corresponding parts, wherein: Figure 1 is the usage state diagram of Embodiment 1 of the present invention; Figure 2 is Figure 1 the sectional view taken along the A-A direction in Figure 3 is the working flow chart of the extracorporeal blood assistance device in the present invention; Figure 4 is Figure 3 the enlarged schematic views at positions b, c, d, and e in Figure 5 view Figure 3 the enlarged schematic views at positions f, g, and h in Figure 6 is the pneumatic circuit schematic diagram of the device housing and each pressing head in the present invention; Figure 7 is the working flow chart of the extracorporeal blood assistance device in Embodiment 2 of the present invention; 1. First pressing head; 2. Medium inlet and outlet; 3. Device housing; 4. Target blood vessel segment; 5. Negative pressure suction port; 6. Upper body tissue above the target blood vessel; 7. Lower body tissue below the target blood vessel; 8. Third pressing head; 9. Sealing and fitting part; 10. Suction pipe of the sealing and fitting part; 11. Second pressing head; 12. Air pump; 13. Fifth solenoid valve; 14. First solenoid valve; 15. Second solenoid valve group; 16. Air supply pipeline; 17. Fourth solenoid valve; 18. Third solenoid valve; 19. Pressure compensation solenoid valve; 20. Return air pipeline; 21. First two-position two-way solenoid valve; 22. Second two-position two-way solenoid valve; 23. Third two-position two-way solenoid valve. Detailed Embodiments

[0016] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive.

[0017] It should be noted that unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention.

[0018] Embodiment 1 of an extracorporeal blood booster device of the present invention is as follows Figures 1 to 6 As shown: The device shell 3 is placed on one side of a corresponding limb (for example, a leg) when in use, and a first pressing head 1, a second pressing head 11 and a third pressing head 8 are arranged on the device shell 3 and are capable of independent movement, which are arranged in sequence along the blood flow of the target blood vessel. Taking the pressing of the leg artery as an example, the first pressing head, the second pressing head and the third pressing head are arranged in sequence along the blood flow of the leg artery.

[0019] In this embodiment, the length of the second pressing head 11 is greater than that of the first pressing head 1, and the length of the second pressing head 11 is greater than that of the third pressing head 8. The first pressing head 1 and the third pressing head 8 are used to close the target blood vessels at the corresponding positions by pressing the two ends of the target blood vessel segment 4; the second pressing head 11 is used to increase the blood pressure in the target blood vessel segment by pressing the target blood vessel segment between the first pressing head 1 and the second pressing head 8. Item 6 in the figure represents the body tissue on the upper side of the target blood vessel segment; item 7 represents the body tissue on the lower side of the target blood vessel segment.

[0020] In this embodiment, each pressing head is a sac-like structure made of elastic material. Each pressing head presses the target blood vessel by expanding by filling a medium inside. The medium is a gas medium (or a liquid medium).

[0021] Each pressing head is provided with a medium inlet and outlet 2, and a switch valve is connected to the medium inlet and outlet.

[0022] The device shell is a cover-shaped structure with an opening at the bottom, and a negative pressure suction port 5 is provided on the device shell. The lower end of the device shell is provided with at least one circle of sealing matching part 9 for sealing with the patient's skin, and the sealing matching part 9 is a vacuum suction cup structure. Figure 2 The middle item 10 represents a suction pipe of the sealing fitting connected to the sealing fitting.

[0023] The upper ends of the first pressing head 1 , the second pressing head 11 and the third pressing head 8 are connected to the top of the device housing 3 .

[0024] An extracorporeal blood booster device also includes an air supply device for supplying air to each pressing head, the air supply device includes an air pump 12 with an air suction port and an air outlet, the switch valve includes a first solenoid valve 14 corresponding to the first pressing head, a second solenoid valve group 15 corresponding to the second pressing head, a third solenoid valve 18 corresponding to the third pressing head, a fourth solenoid valve 17 corresponding to the device shell and a fifth solenoid valve 13 corresponding to the sealing mating part, and the air supply device also includes a pressure-compensating solenoid valve 19.

[0025] The first solenoid valve 14 , the third solenoid valve 18 , the fourth solenoid valve 17 and the fifth solenoid valve 13 are two-position three-way solenoid valves.

[0026] The air outlet of the air pump is connected to an air supply pipeline 16, and the air suction port of the air pump is connected to a return air pipeline 20. The air inlet of the first solenoid valve 14 is connected to the air supply pipeline 16, the air outlet of the first solenoid valve 14 is connected to the inner cavity of the first pressing head, and the air return port of the first solenoid valve is connected to the air extraction pipeline.

[0027] The air inlet of the third solenoid valve 18 is connected to the air supply pipeline 16, the air outlet of the third solenoid valve is connected to the inner cavity of the third pressing head, and the air return port of the third solenoid valve is connected to the air extraction pipeline.

[0028] The air inlet of the fourth solenoid valve 17 is connected to the air supply pipeline 16, the air outlet of the fourth solenoid valve is connected to the inner cavity of the device housing, and the air return port of the fourth solenoid valve is connected to the air extraction pipeline.

[0029] The air inlet of the fifth solenoid valve 13 is connected to the external atmospheric pressure, the air suction port of the fifth solenoid valve 13 is connected to the sealing and mating part, and the air return port of the fifth solenoid valve is connected to the air extraction pipeline.

[0030] The pressure compensation solenoid valve 19 is a two-position two-way solenoid valve. One air port of the pressure compensation solenoid valve is connected to the air extraction pipeline, and the other air port of the pressure compensation solenoid valve is connected to the external atmospheric pressure.

[0031] The second solenoid valve group includes three two-position two-way solenoid valves, which are referred to as the first two-position two-way solenoid valve 21, the second two-position two-way solenoid valve 22, and the third two-position two-way solenoid valve 23. The air inlet of the first two-position two-way solenoid valve is connected to the air supply pipeline, the air inlet of the second two-position two-way solenoid valve is connected to the external atmospheric pressure, the air inlet of the third two-position two-way solenoid valve is connected to the air extraction pipeline, and the air return ports of the three two-position two-way solenoid valves are connected in parallel and then connected to the inner cavity of the second pressing head. The second solenoid valve group can cooperate to adjust the pressure of the air supply pipeline.

[0032] Figure 1 The single arrow in it indicates the blood flow direction.

[0033] Taking the target blood vessel as an arterial blood vessel as an example, the usage process of the present invention is as Figures 3 to 5 shown, Figure 3Among them, b, c, d, e, f, g, and h represent the sequential working processes of the extracorporeal blood assistance device. First, the device shell is buckled on the patient's skin, and the sealing and mating part is aspirated to ensure the connection strength between the device shell and the skin. The target blood vessel is located at this skin position. During this process, the inside of the device shell is in a positive pressure environment. Subsequently, in the first step b, the third pressing head acts, and the downstream of the target blood vessel segment is closed; in the second step c, the device shell is aspirated, and the device shell is in a negative pressure environment. The blood vessel of the target blood vessel segment dilates, and more blood upstream of the target blood vessel segment enters the target blood vessel segment, forming an extracorporeal negative pressure pump, that is, the negative pressure expansion principle is used to make the target blood vessel segment converge more blood; in the third step d, the first pressing head acts, and the upstream of the target blood vessel segment is closed; in the fourth step e, the third pressing head deflates, the downstream of the target blood vessel segment opens, and the excess blood in the target blood vessel segment flows downstream; in the fifth step f, the target blood vessel segment returns to the normal state; in the sixth step g, the second pressing head acts to press the blood in the target blood vessel segment. Due to the blocking effect of the first pressing head, the blood can only flow downstream of the target blood vessel segment and will not flow upstream and downstream simultaneously as in the prior art; then in the seventh step, the third pressing head is inflated to close the downstream of the target blood vessel segment. Subsequently, the cycle starts again from step b to achieve cyclic pumping pressure on the target blood vessel segment, assist blood flow, and improve the body's blood circulation.

[0034] An embodiment 2 of an extracorporeal blood assistance device is as Figure 7 shown: The difference between embodiment 2 and embodiment 1 is that in this embodiment, the housing cover does not have the function of pumping blood with negative pressure. The housing cover only plays a role in fixing the pressing heads. The usage process of the overall extracorporeal blood assistance device is as Figure 7 shown: First, the first pressing head is inflated, and the first pressing head expands to press the upper end of the target blood vessel segment. The first pressing head closes the upstream of the target blood vessel segment. Secondly, the second pressing head is inflated, and the second pressing head expands to press the target blood vessel segment. The blood in the target blood vessel segment will flow directionally to the downstream of the target blood vessel segment under the action of pressure. Subsequently, the third pressing head is inflated to close the downstream of the target blood vessel segment. The second pressing head and the first pressing head deflate to stop pressing the target blood vessel segment. The target blood vessel segment enters blood again for cyclic operation.

[0035] In the above description of this specification, unless otherwise clearly specified and limited, terms such as "fixed", "installed", "connected" or "coupled" should be understood in a broad sense. For example, for the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components or the interaction relationship between two components. Therefore, unless otherwise clearly limited in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0036] Based on the above description of this specification, those skilled in the art can also understand the terms used as follows. For example, terms indicating orientation or positional relationships such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms of orientation or positional relationships cannot be understood or interpreted as limitations on the solution of the present invention.

[0037] In addition, the terms "first" or "second", etc. used in this specification to refer to numbers or ordinals are only for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise specifically and clearly defined.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An extracorporeal blood booster device, characterized in that: The device shell comprises a device shell which is placed on one side of a corresponding limb when in use, and a first pressing head, a second pressing head and a third pressing head which are arranged in sequence along the blood flow of a target blood vessel and can act independently. Each pressing head presses the target blood vessel by expanding by filling a medium inside, or by moving the pressing head up and down.

2. The extracorporeal blood booster according to claim 1, characterized in that: The device shell is a cover-shaped structure with an opening at the bottom, and a negative pressure suction port is arranged on the device shell.

3. The extracorporeal blood booster device according to claim 2, characterized in that: The lower end of the device shell is provided with at least one circle of sealing fitting portion for sealingly fitting with the patient's skin.

4. The extracorporeal blood booster according to claim 3, characterized in that: The sealing mating part is a vacuum suction cup structure.

5. The extracorporeal blood booster according to claim 1, characterized in that: The length of the second pressing head is greater than that of the first pressing head, and the length of the second pressing head is greater than that of the third pressing head.

6. The extracorporeal blood booster according to any one of claims 1 to 5, characterized in that: Each pressing head is a sac-like structure made of elastic material, and each pressing head is expanded by filling a medium inside to press the target blood vessel.

7. The extracorporeal blood booster device according to claim 6, characterized in that: The medium is a gas medium or a liquid medium.

8. The extracorporeal blood booster device according to claim 6, characterized in that: Each pressing head is provided with a medium inlet and outlet, and a switch valve is connected to the medium inlet and outlet.

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