In-vivo liquid transfer pump

Abstract

The embodiment of the invention provides an in-vivo liquid transfer pump. The in-vivo liquid transfer pump comprises a liquid guide hose, a sleeve and a medium hose, the casing pipe covers the outer side of the liquid guide hose, and the two ends of the casing pipe are fixedly connected with the outer side wall of the liquid guide hose, so that a closed annular extrusion cavity is formed between the casing pipe and the liquid guide hose; the in-vivo end of the medium hose communicates with the extrusion cavity, and the in-vitro end of the medium hose is used for being connected with a control pump; a one-way valve used for enabling liquid to flow in a one-way mode is further arranged in the liquid guide hose. According to the technical scheme, the hose is arranged to be of a double-layer structure, the one-way valve is arranged in the liquid guide hose, liquid in the liquid guide hose can be squeezed to flow in one direction to be emptied by controlling filling of the sleeve on the outer side, and then negative pressure is formed by controlling pumping drainage of media in the sleeve on the outer side so that the liquid can be pumped into the liquid guide hose through the one-way valve. And the circulation is repeated, so that the liquid in the body of the patient is unidirectionally transferred to a preset direction.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an in-vivo liquid transfer pump. Background Art

[0002] For certain diseases (such as heart failure, renal failure), volume overload (i.e., an increase in the amount of fluid in the organ beyond the normal value) is the main problem. The traditional treatment methods are to use diuretics to excrete the excess volume, or to remove the excess volume through invasive methods such as dialysis or hemofiltration. In the severe stage of the disease, the drug method gradually becomes inefficient or ineffective. Dialysis and hemofiltration are invasive and expensive methods, which have a great impact on hemodynamics, and there are also some risks in the interaction between blood and the machine. With the progress of medical technology, for organ dysfunction caused by excessive volume, the organ function can be improved by reducing the venous pressure of important organs (such as the heart, kidneys), and thus the purpose of treating the disease can be achieved. Specifically, the excess fluid can be transferred from the vein of the diseased organ to the inferior vena cava to reduce the venous pressure of the diseased organ. However, there is currently no suitable device on the market, and it is very difficult to carry out this operation. Therefore, how to achieve a fast and efficient medical device for in-vivo liquid transfer is a problem that needs to be solved. Summary of the Invention

[0003] An embodiment of the present invention provides an in-vivo liquid transfer pump for quickly and efficiently transferring liquid in a patient's body.

[0004] To achieve the above object, an embodiment of the present invention provides an in-vivo liquid transfer pump, including a liquid guiding hose, a sleeve, and a medium hose; the sleeve is coated on the outer side of the liquid guiding hose, and both ends of the sleeve are fixedly connected to the outer wall of the liquid guiding hose, so as to form a closed annular extrusion cavity between the sleeve and the liquid guiding hose; the in-vivo end of the medium hose is communicated with the extrusion cavity, and the out-of-vivo end of the medium hose is used to connect to a control pump; a one-way valve for making the liquid flow unidirectionally is further arranged inside the liquid guiding hose.

[0005] Further, the outer diameter of the sleeve is 2 mm - 50 mm (most preferably 4 mm - 7 mm).

[0006] Further, the working medium of the control pump (or the filling medium of the sleeve) is liquid or gas.

[0007] Further, the one-way valve includes a one-way valve flap and a limit block; the one-way valve flap is a circular diaphragm structure matching the inner diameter of the liquid guiding hose, and the top end of the one-way valve flap is fixedly connected to the inner wall of the liquid guiding hose; the size of the limit block is smaller than the inner diameter of the liquid guiding hose, the limit block is located at the bottom end of the one-way valve flap, and the limit block is located on the opposite side of the opening direction of the one-way valve flap.

[0008] Furthermore, there are two one-way valves, which are respectively arranged at both ends of the liquid guide hose, and the opening directions of the two one-way valves are the same.

[0009] Furthermore, the liquid guide hose is also provided with a guide wire connecting part for connecting the guide wire.

[0010] The above technical solution has the following beneficial effects:

[0011] In this technical solution, by injecting a filling medium into the sleeve to increase the pressure, the extrusion cavity can be expanded, thereby extruding the liquid guide hose, so that the liquid in the liquid guide hose is output in a predetermined direction. After the filling medium flows back and the extrusion cavity returns to its original position, the negative pressure in the liquid guide hose will attract the liquid at the vein of the diseased organ to continue to flow into the liquid guide hose. At the same time, due to the anti-backflow effect of the one-way valve, the liquid at the inferior vena cava will not flow backward into the liquid guide hose, thus realizing the one-way transfer of the liquid in the patient's body. The device can be guided by a guide wire and placed into a predetermined position through the vein. Since the device has a simple and compact structure and occupies a small space, it is easy to implement and has a wide range of applications.

[0012] In addition, this technical solution also has the following characteristics:

[0013] 1) Due to the structural characteristics of this device, it can also be used for other parts, other organ veins, and can be applied to arteries at any part of the body.

[0014] 2) By setting an automated control pump outside the body, continuous operation can be achieved, greatly improving the work efficiency and effectively enhancing the treatment effect and patient satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of an in-vivo liquid transfer pump according to an embodiment of the present invention;

[0017] Figure 2 is a schematic application scenario diagram of an in-vivo liquid transfer pump according to an embodiment of the present invention;

[0018] Figure 3 is a schematic working principle diagram (extrusion stage) of an in-vivo liquid transfer pump in the body according to an embodiment of the present invention;

[0019] Figure 4Schematic diagram of the working principle of an in-vivo liquid transfer pump in an embodiment of the present invention (reset stage);

[0020] Reference numerals in the attached drawings: 1, sleeve; 2, extrusion chamber; 3, liquid guiding hose; 4, wire connection part; 5, one-way valve flap; 6, medium hose; 7, control pump; 8, limit block; 10, vein. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] To solve the foregoing problems, in the present application, as Figure 1 shown, the liquid guiding hose 3 is used as the transfer path of the liquid in the patient's body, and the overall structure is set as a double-layer structure, that is, a sleeve 1 is further coated outside the liquid guiding hose 3, and the front and rear sections of the sleeve 1 are fixedly connected to the outside of the liquid guiding hose 3, so as to form an extrusion chamber 2 between the liquid guiding hose 3 and the sleeve 1. Then, by pressurizing the extrusion chamber 2, the liquid guiding hose 3 is pressed to deform inwardly, so that the liquid inside the liquid guiding hose 3 is extruded outward along the opening direction of the one-way valve, thereby realizing the one-way flow of the liquid. This technical solution has a simple structure and a small number of components. Therefore, under the existing process level, the volume can be made very small, and minimally invasive treatment can be realized, which is very suitable for the treatment of diseases such as the aforementioned heart failure and renal failure.

[0023] During use, as Figure 2 shown, according to the operation method of the existing interventional treatment, the entire liquid transfer pump is introduced into the patient's body along the vein 10 through the guidance of a guide wire, and through fine adjustment of the guide wire, the input end of the liquid guiding hose 3 is placed at the vein of the diseased organ, and the output end of the liquid guiding hose 3 is placed at the inferior vena cava (the opening direction of the one-way valve faces the inferior vena cava). Then, a filling medium (such as normal saline) is output by the control pump 7 placed outside the patient. After the filling medium enters the extrusion chamber 2 through the medium hose 6, the extrusion chamber 2 will expand and deform, so that the tube wall of the liquid guiding hose 3 is sunken and deformed. At this time, the liquid pressure in the liquid guiding hose 3 increases, and then the liquid flows out to the output end.

[0024] In order to be smoothly inserted into the patient's body along the vein, in this in-vivo liquid transfer pump, the outer diameter of the sleeve 1 should be limited between 3 mm and 15 mm (the most preferably is 4 mm - 7 mm). At the same time, the liquid guiding hose 3, the sleeve 1, the medium hose 6 and other in-vivo parts are all made of medical materials, for example, a non-metallic flexible material used in the existing interventional catheter can be adopted.

[0025] Meanwhile, in this technical solution, when the pressure in the extrusion cavity 2 is increased, it is preferable that the sleeve 1 only deforms and expands inward to extrude the liquid guiding hose 3, and does not deform outward as much as possible so as not to affect the vein 10. For this purpose, reference can be made to the design of a non-compliant balloon in the prior art. The material of its balloon wall (equivalent to the outer wall of the sleeve 6 in this application) has good compressive resistance, and the outer diameter of the balloon does not increase when the pressure is increased.

[0026] The structure of the one-way valve can be various. The simplest solution is as Figure 1 shown. It is composed of a one-way valve flap 5 and a limiting block 8. The one-way valve flap 5 is a circular diaphragm arranged in the liquid guiding hose 3. A part of it is fixedly connected to the inner wall of the liquid guiding hose 3, and the connection part between the two is also elastic, so that the free end of the one-way valve flap 5 (the part not connected to the inner wall of the liquid guiding hose 3) can swing left and right under the push of the liquid; at the same time, on the opposite side of the connection part, a limiting block 8 protruding inward from the inner wall of the liquid guiding hose 3 is fixedly arranged on the inner wall of the liquid guiding hose 3 to block the one-way valve flap 5 from swinging toward the side where the limiting block 8 is located, forming a one-way blocking effect. As Figure 1 shown, when the liquid flows toward the output end, the free end of the one-way valve flap 5 can swing to the right (see the dotted line in the figure), thus forming a passage; if the liquid flows in the reverse direction, at the moment of reverse flow, under the push of the liquid, the one-way valve flap 5 swings to the left, but due to the blocking of the limiting block 8, the one-way valve flap 5 cannot cross the midline and continue to swing to the left, and can only stay in the vertical position in the figure. At this time, the passage is closed and the liquid flow is blocked.

[0027] In addition, in order to achieve better results and ensure the one-way flow of the liquid, as Figure 1 shown, multiple one-way valves (preferably two) can be provided, and the two one-way valves are respectively arranged at both ends of the liquid guiding hose 3. At the same time, the opening directions of the two one-way valve flaps 5 should be the same.

[0028] The operation process of a liquid transfer pump in the body according to an embodiment of the present invention is as follows:

[0029] Step 1: Through a guide wire connected to the guide wire connection part 4, place the liquid transfer pump in the body through the vein opening into the vein 10, and send it along the vein to a predetermined position in the patient's body, so that the input end of the liquid guiding hose 3 is placed at the vein of the diseased organ and the output end is placed at the inferior vena cava.

[0030] Step 2: Connect the outer end of the medium hose 6 to the control pump 7.

[0031] Step 3 (extrusion stage): Actuate the control pump 7 so that the filling medium output by it enters the extrusion cavity 2 in the sleeve 1 through the medium hose 6, so that the extrusion cavity 2 is filled and bulges, forming Figure 3The state shown. At this time, the liquid guide hose 3 located inside the sleeve 1 is deformed under pressure, so that the liquid in the liquid guide hose 3 is extruded from the one-way valve at the output end (see the hollow arrow in the figure). At the same time, since the internal pressure of the liquid guide hose 3 increases during the extrusion deformation, the one-way valve at the input end ( Figure 3 the left one-way valve in it) is closed under pressure, thus preventing the liquid in the liquid guide hose 3 from flowing back to the vein of the diseased organ;

[0032] It should be noted that at the initial application, the liquid extruded by the first one or several extrusion operations may not be the liquid at the vein of the diseased organ, but the initial filler (such as normal saline) in the liquid guide hose 3 is extruded first. After the subsequent initial filler is emptied, the liquid at the vein of the diseased organ will enter the liquid guide hose 3;

[0033] Step 4 (reset stage): Make the control pump 7 act reversely, so that the filling medium in the extrusion chamber 2 flows back to the control pump 7 through the medium hose 6, making the extrusion chamber 2 reset. At this time, due to the reset of the extrusion chamber 2 generating a certain negative pressure, and the self-return elasticity of the wall of the liquid guide hose 3, the liquid guide hose 3 will return to the shape of a cylindrical tube, and then a certain degree of negative pressure will also be generated inside the liquid guide hose 3. At this time, as Figure 4 shown, the pressure at the inferior vena cava is greater than the pressure inside the liquid guide hose 3, so that the one-way valve flap 5 at the output end is pushed back and abuts against the corresponding limit block 8, and this one-way valve closes; at the same time, the liquid pressure at the vein of the diseased organ is higher than the pressure inside the liquid guide hose 3. Therefore, the one-way valve flap 5 at the input end ( Figure 4 the left side in it) is pushed open, and the opening of this one-way valve allows the liquid at the vein of the diseased organ to flow into the liquid guide hose 3;

[0034] Step 5: Repeat the above steps 3 and 4 to form an intermittent one-way flow until all the liquid to be transferred is transferred into the inferior vena cava;

[0035] Step 6: Under the guidance of a guide wire, remove the in-vivo liquid transfer pump along the vein.

[0036] In addition, it should be noted that the control pump 7 can be a manual pump (such as a piston-type manual pump used in the medical industry to control an inflatable and deflatable balloon), or an automatic pump. The automatic control pump 7 is made to perform the above actions through a preset program, so as to further improve the working efficiency.

[0037] In the foregoing detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are expressly recited in each claim. On the contrary, as reflected in the appended claims, the invention lies in less than the full scope of the features of the single disclosed embodiment. Accordingly, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0038] The above-described disclosed embodiments have been described so as to enable any person skilled in the art to make or use the present invention. For those skilled in the art, various modifications to these embodiments will be readily apparent, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the present disclosure. Thus, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0039] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An in vivo fluid transfer pump, characterized in that: The invention comprises a liquid guiding hose (3), a sleeve (1), and a medium hose (6); the sleeve (1) is coated on the outside of the liquid guiding hose (3), and the two ends of the sleeve (1) are fixedly connected to the outer wall of the liquid guiding hose (3), so that a closed annular extrusion cavity (2) is formed between the sleeve (1) and the liquid guiding hose (3); the inner end of the medium hose (6) is connected to the extrusion cavity (2), and the outer end of the medium hose (6) is used to connect to a control pump (7); and a one-way valve for allowing liquid to flow in one direction is also arranged inside the liquid guiding hose (3).

2. The in vivo fluid transfer pump according to claim 1, characterized in that: The outer diameter of the sleeve (1) is 2 mm to 50 mm.

3. The in vivo fluid transfer pump according to claim 2, characterized in that: The working medium of the control pump (7) is liquid or gas.

4. The in vivo fluid transfer pump according to claim 2, characterized in that: The one-way valve comprises a one-way valve flap (5) and a limit block (8); the one-way valve flap (5) is a circular diaphragm structure matching the inner diameter of the liquid-conducting hose (3); the top end of the one-way valve flap (5) is fixedly connected to the inner wall of the liquid-conducting hose (3); the size of the limit block (8) is smaller than the inner diameter of the liquid-conducting hose (3); the limit block (8) is located at the bottom end of the one-way valve flap (5), and the limit block (8) is located on the side opposite to the opening direction of the one-way valve flap (5).

5. The in vivo fluid transfer pump according to claim 4, characterized in that: There are two one-way valves in total, and the two one-way valves are respectively arranged at two ends of the liquid guiding hose (3), and the opening directions of the two one-way valves are consistent.

6. The in vivo fluid transfer pump according to claim 2, characterized in that: The liquid guiding hose (3) is also provided with a guide wire connecting portion (4) for connecting a guide wire.

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