Portable ascites aspirator for cirrhosis

Abstract

The invention relates to the technical field of medical instruments, and discloses a portable cirrhosis ascites aspirator which comprises a piston type driving mechanism and a buffer type liquid conveying mechanism. The first liquid one-way valve and the second liquid one-way valve are installed in the longitudinal hollow shell and can perform one-way control on flowing liquid, and the annular air film can perform a buffering effect on the flowing liquid. According to the portable ascites aspirator for cirrhosis, the piston type movement principle is utilized, the functions of negative pressure suction and high pressure discharge of accumulated water can be achieved, and therefore the effective suction and discharge effect of accumulated water on the abdomen of a patient is achieved; the annular gas film can automatically generate a buffering effect on flowing liquid according to the inner side area, the outer layer area and the elastic capacity of the annular gas film, so that the negative influence caused by the water hammer effect is reduced, and the liquid backflow phenomenon is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a portable liver cirrhosis ascites aspirator. Background Art

[0002] Cirrhosis refers to a pathological state in which the normal structure of the liver is destroyed. It is a common chronic, progressive, diffuse liver disease caused by various reasons. Since cirrhosis can easily lead to abdominal water accumulation, in order to ensure the patient's abdominal health, a medical suction device is needed to drain the water from the patient's abdomen.

[0003] For example, the Chinese patent with the publication number "CN213554182U" discloses "a portable liver cirrhosis ascites aspirator", whose main structure includes a pipette, a micro air pump, a baffle and a limit frame, the pipette is screwed with a fixed frame, the worm is meshed with a worm wheel, and the worm wheel is movably connected to the pipette, the worm wheel is screwed with a turntable, and a sliding groove is provided on the turntable, a sliding rod is slidably connected in the sliding groove, and the sliding rod is welded on the baffle, the baffle is rotatably connected to the fixed disk, and the fixed disk is screwed in the pipette, and a through hole is provided on the fixed disk. The portable liver cirrhosis ascites aspirator is provided with a baffle, and the worm can drive the turntable to rotate through the worm wheel. At this time, the sliding groove can drive the corresponding baffle to rotate at the same time by toggling each sliding rod. At this time, combined with the through hole, the extraction flow of the pipette during extraction can be conveniently and quickly adjusted, which can ensure the extraction comfort of subsequent patients.

[0004] Obviously, when the above-mentioned portable liver cirrhosis ascites aspirator is used to aspirate the accumulated water in the patient's abdomen, it utilizes a micro air pump to realize the functions of extracting and compressing the liquid. During the aspiration process, once the output pressure of the micro air pump becomes unstable, it will cause a water hammer effect in the liquid inside the suction tube and cause reflux. Especially when the micro air pump is suddenly turned off, the water hammer effect is most obvious, which can easily lead to the reflux of accumulated water. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a portable liver cirrhosis ascites aspirator, which utilizes the piston movement principle to achieve negative pressure suction and high pressure discharge functions for accumulated water, thereby achieving effective suction and discharge effects on the patient's abdominal water accumulation. In addition, when the water hammer effect occurs in the device, the annular air membrane can autonomously produce a buffering effect on the flowing liquid based on the inner area and the outer area and its own elasticity, thereby reducing the negative impact caused by the water hammer effect and reducing the occurrence of liquid reflux, thereby solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable liver cirrhosis ascites aspirator, comprising a support base, a longitudinal support rod fixedly installed on one side of the upper surface of the support base, a motor fixing sleeve fixedly installed on the top of the longitudinal support rod, and a driving motor fixedly installed in the motor fixing sleeve in a horizontal state, and also comprising a piston-type driving mechanism, wherein a turntable capable of rotating with the rotor of the driving motor, a horizontal rotating shaft offsetly installed on the rotating end surface of the turntable and capable of performing circular motion with the rotation of the turntable, and a piston capable of moving with the movement of the horizontal rotating shaft are arranged inside; and a buffer-type liquid conveying mechanism, wherein a longitudinal hollow shell capable of cooperating with the piston to realize liquid suction, a No. 1 liquid one-way valve and a No. 2 liquid one-way valve installed inside the longitudinal hollow shell and capable of one-way control of the flowing liquid, and an annular air film capable of buffering the flowing liquid are arranged inside.

[0007] Preferably, the piston drive mechanism includes a turntable and a piston, a rotor fixing groove for fixing and installing a rotor is arranged at the center of one rotating end of the turntable, a horizontal rotating shaft is fixedly installed on the other rotating end surface of the turntable, the shaft body of the horizontal rotating shaft is installed in a sleeve hole of a shaft body fixing sleeve through a bearing, a longitudinal movable rod with an integral structure therewith is arranged in the middle of the outer circumferential surface of the shaft body fixing sleeve, a ball head with an integral structure therewith is arranged at the end of the longitudinal movable rod, a spherical mounting cavity with a concave structure is arranged at the center of the upper surface of the piston, and the ball head is placed inside the spherical mounting cavity.

[0008] Preferably, the axis centerline of the horizontal rotating shaft is arranged parallel to the axis centerline of the turntable, and the axis centerline of the horizontal rotating shaft is arranged to one side deviating from the axis centerline of the turntable.

[0009] Preferably, the connection relationship between the ball head and the spherical installation cavity is a clearance fit, and the depth of the spherical installation cavity is greater than the structural radius of the ball head and smaller than the structural diameter of the ball head.

[0010] Preferably, the cache-type liquid conveying mechanism includes a longitudinal hollow shell, the interior of the longitudinal hollow shell is provided with a longitudinal component active cavity with an open top for longitudinal movement of the piston, the longitudinal hollow shell is provided with a No. 1 liquid flow hole at the bottom end of the longitudinal component active cavity, the longitudinal hollow shell is provided with a liquid cache cavity at the bottom end of the No. 1 liquid flow hole, the longitudinal hollow shell is provided with a No. 2 liquid flow hole at the bottom end of the liquid cache cavity, the circumferential side of the longitudinal hollow shell is provided with a liquid discharge channel connecting the external space and the middle area of ​​the circumferential surface of the No. 1 liquid flow hole, and the outer circumferential surface of the longitudinal hollow shell is provided with A liquid suction channel connecting the external space and the side of the No. 2 liquid flow hole is provided, and an annular air film is installed in a sealing manner inside the liquid cache cavity of the longitudinal hollow shell. The annular air film divides the liquid cache cavity into an outer area and an inner area, and the inner area is connected with the flow paths of the No. 1 liquid flow hole and the No. 2 liquid flow hole. A No. 1 liquid one-way valve is installed in the area between the bottom end of the No. 1 liquid flow hole and the liquid discharge channel, and a No. 2 liquid one-way valve is installed inside the liquid discharge channel. The bottom end of the longitudinal hollow shell is provided with a bottom fixing plate which is an integral structure with it and fixedly installed on the other side of the upper surface of the support base.

[0011] Preferably, the liquid inlet port of the No. 1 liquid one-way valve faces the movable cavity of the longitudinal component, and the liquid discharge port faces the inner area of ​​the liquid cache cavity.

[0012] Preferably, the liquid inlet port of the No. 2 liquid one-way valve faces the No. 1 liquid flow hole, and the liquid discharge port faces the external space.

[0013] Compared with the prior art, the present invention provides a portable liver cirrhosis ascites aspirator, which has the following beneficial effects: By utilizing the piston motion principle, it can realize negative pressure suction and high-pressure discharge of accumulated water, thereby achieving effective suction and discharge effect on the patient's abdominal water. In addition, when the water hammer effect occurs, the annular air membrane of the device can autonomously produce a buffering effect on the flowing liquid according to the inner area and the outer area and its own elasticity, thereby reducing the negative impact caused by the water hammer effect and reducing the occurrence of liquid reflux. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereogram of the present invention at a first viewing angle; Figure 2 It is a stereogram of the present invention at a second viewing angle; Figure 3 is a three-dimensional cross-sectional view of the present invention; Figure 4 is a three-dimensional diagram of the piston drive mechanism of the present invention; Figure 5is a three-dimensional cross-sectional view of the piston drive mechanism of the present invention; Figure 6 It is a three-dimensional diagram of the buffer type liquid delivery mechanism in the present invention; Figure 7 It is a three-dimensional cross-sectional view of the buffer-type liquid conveying mechanism in the present invention.

[0015] Among them: 1. Support base; 2. Longitudinal support rod; 3. Motor fixing sleeve; 4. Driving motor; 5. Rotor; 6. Piston drive mechanism; 61. Turntable; 62. Rotor fixing groove; 63. Horizontal rotating shaft; 64. Shaft fixing sleeve; 65. Longitudinal movable rod; 66. Piston; 67. Spherical mounting cavity; 68. Ball head; 7. Cache-type liquid conveying mechanism; 71. Longitudinal hollow shell; 72. Longitudinal component movable cavity; 73. No. 1 liquid flow hole; 74. Liquid cache cavity; 75. No. 2 liquid flow hole; 76. Liquid discharge channel; 77. Liquid suction channel; 78. No. 1 liquid one-way valve; 79. No. 2 liquid one-way valve; 710. Annular air film; 711. Bottom fixing plate. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 , Figure 2 and Figure 3 A portable liver cirrhosis ascites aspirator comprises a support base 1, a longitudinal support rod 2 fixedly mounted on one side of the upper surface of the support base 1, a motor fixing sleeve 3 fixedly mounted on the top of the longitudinal support rod 2, and a driving motor 4 fixedly mounted in the motor fixing sleeve 3 in a horizontal state. By starting the driving motor 4 and controlling the rotation speed of the rotor 5, the speed of extracting the accumulated water can be controlled.

[0018] For suction and compression discharge of liquids, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, it is necessary to set up a piston-type driving mechanism 6, which is provided with a turntable 61 that can rotate with the rotor 5 of the driving motor 4, a horizontal rotating shaft 63 that is offsetly installed on the rotating end surface of the turntable 61 and can make a circular motion with the rotation of the turntable 61, and a piston 66 that can move with the movement of the horizontal rotating shaft 63. After the rotor 5 rotates, the horizontal rotating shaft 63 will make a circular motion around the axis of the turntable 61, and the circular motion will drive the piston 66 to move. Due to the connection between the ball head 68 and the spherical mounting cavity 67, and the position of the piston 66 being limited by the longitudinal component active cavity 72, the piston 66 will produce a reciprocating longitudinal movement. When the piston 66 moves upward, the accumulated fluid will be sucked upward into the longitudinal component active cavity 72. When the piston 66 moves downward, the accumulated fluid in the longitudinal component active cavity 72 will be compressed and discharged, thereby realizing the functions of sucking out the liquid and compressing and discharging the liquid, so that the accumulated fluid in the patient's abdomen is continuously discharged.

[0019] For the specific structure of the piston drive mechanism 6, please refer to Figure 4 and Figure 5 , comprising a turntable 61 and a piston 66, wherein a rotor fixing groove 62 for fixing and installing the rotor 5 is arranged at the center of one rotating end of the turntable 61, a horizontal rotating shaft 63 is fixedly installed on the other rotating end surface of the turntable 61, and the shaft body of the horizontal rotating shaft 63 is installed in a sleeve hole of a shaft body fixing sleeve 64 through a bearing, and a longitudinal movable rod 65 with an integral structure thereof is arranged in the middle of the outer circumferential surface of the shaft body fixing sleeve 64, and a ball head 68 with an integral structure thereof is arranged at the end of the longitudinal movable rod 65, and the piston 6 6 is provided with a spherical mounting cavity 67 of a concave structure at the center of the upper surface, the ball head 68 is placed inside the spherical mounting cavity 67, the axis line of the horizontal rotating shaft 63 is arranged parallel to the axis line of the turntable 61, and the axis line of the horizontal rotating shaft 63 is arranged to deviate from the axis line of the turntable 61, the connection relationship between the ball head 68 and the spherical mounting cavity 67 is a clearance fit, and the depth of the spherical mounting cavity 67 is greater than the structural radius of the ball head 68 and less than the structural diameter of the ball head 68.

[0020] To achieve a buffered discharge of accumulated liquid, refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7, it is necessary to set up a buffer-type liquid delivery mechanism 7, which is provided with a longitudinal hollow shell 71 inside which can cooperate with the piston 66 to realize liquid suction, a No. 1 liquid one-way valve 78 and a No. 2 liquid one-way valve 79 installed inside the longitudinal hollow shell 71 and capable of one-way control of the flowing liquid, and an annular air film 710 capable of buffering the flowing liquid. First, the liquid discharge channel 76 is connected to the tank body for storing the accumulated fluid, and then the liquid suction channel 77 is connected to the drainage tube inserted into the patient's abdomen. Under the action of the No. 1 liquid one-way valve 78 and the No. 2 liquid one-way valve 79, the liquid will be unidirectionally discharged from the one-way valve 78 and the No. 2 liquid one-way valve 79. The liquid is sucked out from the patient's abdomen and discharged outwardly through the liquid discharge channel 76. Once the liquid flow becomes unstable or the drive motor 4 is suddenly shut down, the accumulated liquid in the inner area of ​​the liquid buffer chamber 74 will form an impact effect on the annular air film 710 under the impact of the flowing liquid, causing the annular air film 710 to expand outward, thereby reducing the degree of damage to the equipment and connecting pipes caused by the water hammer effect. At the same time, when the area inside the annular air film 710 is subjected to negative pressure, it will deform inwardly, thereby reducing the negative impact of the instantaneous excessive intensity of the negative pressure on the suction force, thereby improving the safety and stability of the equipment during operation.

[0021] For the specific structure of the buffer type liquid delivery mechanism 7, please refer to Figure 6 and Figure 7, including a longitudinal hollow shell 71, the interior of the longitudinal hollow shell 71 is provided with a longitudinal component active cavity 72 with an open top and used for the longitudinal movement of the piston 66, the longitudinal hollow shell 71 is provided with a No. 1 liquid flow hole 73 at the bottom end of the longitudinal component active cavity 72, the longitudinal hollow shell 71 is provided with a liquid cache cavity 74 at the bottom end of the No. 1 liquid flow hole 73, the longitudinal hollow shell 71 is provided with a No. 2 liquid flow hole 75 at the bottom end of the liquid cache cavity 74, the circumferential side of the longitudinal hollow shell 71 is provided with a liquid discharge channel 76 connecting the external space and the middle area of ​​the circumferential surface of the No. 1 liquid flow hole 73, the outer circumferential surface of the longitudinal hollow shell 71 is provided with a liquid suction channel 77 connecting the external space and the side of the No. 2 liquid flow hole 75, the longitudinal hollow shell 71 is provided with a liquid cache cavity 74 at the bottom end of the liquid cache cavity 74, 4 is provided with an annular air film 710 on the inner edge sealing type, the annular air film 710 divides the liquid cache chamber 74 into an outer area and an inner area, and the inner area is connected with the flow paths of the No. 1 liquid flow hole 73 and the No. 2 liquid flow hole 75, the No. 1 liquid flow hole 73 is provided with a No. 1 liquid check valve 78 in the area between its bottom end and the liquid discharge channel 76, the No. 2 liquid check valve 79 is installed inside the liquid discharge channel 76, the bottom end of the longitudinal hollow shell 71 is provided with a bottom fixing plate 711 which is an integral structure with it and fixedly mounted on the other side of the upper surface of the support base 1, the liquid inlet port of the No. 1 liquid check valve 78 is toward the longitudinal component active chamber 72, and the liquid discharge port is toward the inner area of ​​the liquid cache chamber 74, the liquid inlet port of the No. 2 liquid check valve 79 is toward the No. 1 liquid flow hole 73, and the liquid discharge port is toward the external space.

[0022] When in use, the liquid discharge channel 76 is connected to the tank for storing the accumulated fluid, and the liquid suction channel 77 is connected to the drainage tube inserted into the patient's abdomen. The drive motor 4 is started, and after the rotor 5 rotates, the horizontal rotating shaft 63 will produce a circular motion around the axis of the turntable 61. The circular motion will drive the piston 66 to move. Due to the connection between the ball head 68 and the spherical mounting cavity 67, and the position of the piston 66 is limited by the longitudinal component active cavity 72, the piston 66 will produce a reciprocating longitudinal movement. When the piston 66 moves upward, the accumulated fluid will be sucked upward into the longitudinal component active cavity 72. When the piston 66 moves downward, the accumulated fluid located in the longitudinal component active cavity 72 will be compressed and discharged, thereby realizing the liquid suction and compression discharge functions, so that the accumulated fluid in the patient's abdomen is continuously discharged.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable liver cirrhosis ascites aspirator, comprising a support base (1), a longitudinal support rod (2) fixedly mounted on one side of the upper surface of the support base (1), a motor fixing sleeve (3) fixedly mounted on the top of the longitudinal support rod (2), and a driving motor (4) fixedly mounted in the motor fixing sleeve (3) in a horizontal state, characterized in that: Also includes, A piston-type drive mechanism (6), wherein a turntable (61) capable of rotating along with a rotor (5) of a drive motor (4) is provided inside the turntable (61), a horizontal rotation shaft (63) offsetly mounted on a rotating end surface of the turntable (61) and capable of performing circular motion along with the rotation of the turntable (61), and a piston (66) capable of moving along with the movement of the horizontal rotation shaft (63); And a buffer-type liquid delivery mechanism (7), which is provided with a longitudinal hollow shell (71) capable of cooperating with the piston (66) to achieve liquid suction, a first liquid one-way valve (78) and a second liquid one-way valve (79) installed inside the longitudinal hollow shell (71) and capable of unidirectionally controlling the flowing liquid, and an annular air film (710) capable of providing a buffering effect on the flowing liquid.

2. A portable liver cirrhosis ascites aspirator according to claim 1, characterized in that: The piston drive mechanism (6) comprises a turntable (61) and a piston (66); a rotor fixing groove (62) for fixing and mounting a rotor (5) is arranged at the center of one rotating end of the turntable (61); a horizontal rotating shaft (63) is fixedly mounted on the other rotating end surface of the turntable (61); the shaft body of the horizontal rotating shaft (63) is mounted in a sleeve hole of a shaft body fixing sleeve (64) via a bearing; a longitudinal movable rod (65) with an integral structure therewith is arranged in the middle of the outer circumferential surface of the shaft body fixing sleeve (64); a ball head (68) with an integral structure therewith is arranged at the end of the longitudinal movable rod (65); a spherical mounting cavity (67) with an inner concave structure is arranged at the center of the upper surface of the piston (66); the ball head (68) is placed inside the spherical mounting cavity (67).

3. A portable liver cirrhosis ascites aspirator according to claim 2, characterized in that: The axis centerline of the horizontal rotating shaft (63) is arranged parallel to the axis centerline of the rotating disk (61), and the axis centerline of the horizontal rotating shaft (63) is arranged to deviate from the axis centerline of the rotating disk (61).

4. A portable liver cirrhosis ascites aspirator according to claim 3, characterized in that: The connection relationship between the ball head (68) and the spherical installation cavity (67) is a clearance fit, and the depth of the spherical installation cavity (67) is greater than the structural radius of the ball head (68) and less than the structural diameter of the ball head (68).

5. A portable liver cirrhosis ascites aspirator according to claim 4, characterized in that: The buffer-type liquid delivery mechanism (7) comprises a longitudinal hollow shell (71), the interior of the longitudinal hollow shell (71) is provided with a longitudinal component active cavity (72) with an open top for longitudinal movement of the piston (66), the longitudinal hollow shell (71) is provided with a first liquid flow hole (73) at the bottom end of the longitudinal component active cavity (72), the longitudinal hollow shell (71) is provided with a liquid buffer cavity (74) at the bottom end of the first liquid flow hole (73), the longitudinal hollow shell (71) is provided with a second liquid flow hole (75) at the bottom end of the liquid buffer cavity (74), the circumferential side surface of the longitudinal hollow shell (71) is provided with a liquid discharge channel (76) connecting the external space and the middle area of ​​the circumferential surface of the first liquid flow hole (73), and the outer circumferential surface of the longitudinal hollow shell (71) is provided with a liquid discharge channel (76) connecting the external space and the circumferential surface of the first liquid flow hole (73). There is a liquid suction channel (77) connecting the external space and the side of the No. 2 liquid flow hole (75); the longitudinal hollow shell (71) is provided with an annular air film (710) in a sealing manner inside the liquid cache chamber (74); the annular air film (710) divides the liquid cache chamber (74) into an outer area and an inner area, and the inner area is connected to the flow paths of the No. 1 liquid flow hole (73) and the No. 2 liquid flow hole (75); the No. 1 liquid flow hole (73) is provided with a No. 1 liquid check valve (78) in the area between the bottom end thereof and the liquid discharge channel (76); the No. 2 liquid check valve (79) is installed inside the liquid discharge channel (76); the bottom end of the longitudinal hollow shell (71) is provided with a bottom fixing plate (711) which is an integral structure with the shell and fixedly installed on the other side of the upper surface of the support base (1).

6. A portable liver cirrhosis ascites aspirator according to claim 5, characterized in that: The liquid inlet port of the first liquid one-way valve (78) faces the longitudinal component active cavity (72), and the liquid discharge port faces the inner area of ​​the liquid buffer cavity (74).

7. A portable liver cirrhosis ascites aspirator according to claim 6, characterized in that: The liquid inlet port of the second liquid one-way valve (79) faces the first liquid flow hole (73), and the liquid outlet port faces the external space.

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