Automatic liquid supplementing device for blood purification

Abstract

The utility model relates to the technical field of blood purification fluid infusion, and discloses an automatic fluid infusion device for blood purification, which comprises a workbench, an air cylinder fixedly connected to the upper surface of the workbench, a movable plate fixedly connected to the output end of the air cylinder, a sliding rod fixedly connected to one side of the movable plate, and a telescopic rod fixedly connected to the interior of the sliding rod. The movable end of the telescopic rod is connected with a piston, the piston is slidably connected into the sleeve, the middle of the sleeve is fixedly connected with a fixed cylinder, the fixed cylinder is connected with a feeding pipe, the tail end of the sleeve is connected with a discharging pipe, a three-way pipe is rotationally arranged in the fixed cylinder, and the two ends of the three-way pipe are connected with driving assemblies through rotating shafts respectively, the control module receives blood pump front pressure data and starts the air cylinder according to a set value, and automatic control over the liquid supplementing process is achieved. According to the utility model, the flow stability in the blood purification process is ensured, the additional burden of medical personnel caused by fluid infusion operation is reduced, and the treatment cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood purification liquid supplementing technical field especially blood purification automatic liquid supplementing device. BACKGROUND

[0002] Continuous blood purification, including hemodialysis, continuous renal replacement therapy (CRRT), plasma exchange, plasma adsorption and various treatment methods, is through blood vessel access to drain blood in the patient's body to the extracorporeal pipeline, through the blood filter or other purification device, using diffusion, convection, ultrafiltration, adsorption and other principles, discharging toxins and excess water, which can continuously and stably control nitrogenous anemia, regulate water, electrolyte and acid-base balance, remove inflammatory mediators and antibodies and other solutes, and then return the purified blood to the patient's body, which is the third largest treatment method as medicine and surgery, and is an important method for treating various clinical diseases.

[0003] Since blood purification mostly needs at least 8 hours or more long time treatment every day, which cannot be interrupted, but due to the patient's blood vessels, body position, coagulation, cooperation degree, consciousness state and other conditions, deep vein catheterization position, length, type, use time and other conditions, there may be temporary flow shortage during blood purification treatment, which leads to blood circulation stop in body position. At this time, the nurse can relieve it by supplementing a small amount of normal saline from the water inlet and continuing the treatment. However, the nurse is not only responsible for the blood purification treatment of this patient, but also needs to treat other patients or perform other nursing work, which cannot be handled in time. The extracorporeal circulation stops for too long, which easily leads to extracorporeal circulation coagulation. Once coagulation occurs, not only the patient's blood is lost, but also the disease is affected, and a set of extracorporeal circulation kit needs to be replaced, which increases the treatment cost. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides blood purification automatic liquid supplementing device, aims at improving the problem that the traditional blood purification device is difficult to supplement liquid by itself, highly depends on medical staff, easily leads to extracorporeal circulation coagulation, once coagulation occurs, not only the patient's blood is lost, but also the disease is affected, and a set of extracorporeal circulation kit needs to be replaced, which increases the treatment cost.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: blood purification automatic liquid supplementing device, including workbench, the upper fixed connection of workbench has pneumatic cylinder, the output end fixed connection of pneumatic cylinder has moving plate, the side fixed connection of moving plate has sliding rod, the fixed connection of sliding rod in has telescopic link, the movable end fixed connection of telescopic link has piston, the piston is arranged in the sleeve and slides, the spring one fixed connection of piston is set on telescopic link, the other end of spring one is fixedly connected with the inner wall of sliding rod;

[0006] A fixed cylinder is fixedly connected to the middle of the sleeve. The fixed cylinder is fixedly installed on the workbench by a support. The upper part of the fixed cylinder is connected to the physiological saline supply end through an inlet pipe. The end of the sleeve is connected to the water inlet of the blood purification equipment through a discharge pipe.

[0007] A three-way pipe is rotatably installed inside the fixed cylinder. The two ends of the three-way pipe are respectively connected to a rotating shaft that passes through the fixed cylinder. The rotating shaft is connected to a driving component. The driving component drives the three-way pipe to rotate through the rotating shaft, thereby realizing the switching between connecting the inner cavity of the sleeve with the feed pipe and connecting the inner cavity of the sleeve with the discharge pipe through the three-way pipe.

[0008] It also includes a control module, which receives pre-pump pressure data and sends a command to start the cylinder when the pressure data reaches a set value.

[0009] Furthermore, the drive assembly includes a connecting plate, which is fixedly connected to the rotating shaft. A drive rod is rotatably connected to the lower part of the connecting plate, and the other end of the drive rod is rotatably connected to the movable plate.

[0010] Furthermore, the sleeve is provided with a limiting component for limiting the movement of the piston. The limiting component includes a sliding sleeve slidably disposed on the outer wall of the sleeve. A connecting post is fixedly connected to the side of the sliding sleeve near the sleeve. A through groove is opened in the connecting post. The tube wall of the sleeve is inserted into the through groove. A limiting ring is fixedly connected to the connecting post on one side of the sleeve. The limiting ring is slidably connected to the inner wall of the sleeve.

[0011] Furthermore, a pull plate is provided on the outer side of the sliding sleeve, and a sliding rod is connected to the pull plate through the sliding sleeve. A locking block is connected to one end of the sliding rod located on the inner side of the sliding sleeve. A spring is sleeved on the sliding rod between the locking block and the sliding sleeve. Multiple locking holes that match the locking blocks are spaced apart on the outer wall of the sleeve.

[0012] Furthermore, a limiting block is fixedly connected to the outer wall of the card block, and the outer wall of the limiting block is slidably connected inside the sliding sleeve. The limiting block is used to limit the movement of the card block.

[0013] Furthermore, a one-way valve is provided on the feed pipe.

[0014] This utility model has the following beneficial effects:

[0015] The automatic liquid supplementing device for blood purification can monitor the pressure before the blood pump in real time, and when the negative pressure before the blood pump reaches the set value, the liquid supplementing is automatically started, so that the flow stability in the blood purification process is ensured, the extracorporeal circulation blood clotting problem caused by insufficient flow is avoided, medical staff can pay more attention to other treatment and nursing work of patients, and the additional burden caused by the liquid supplementing operation is reduced; the equipment failure caused by the untimely liquid supplementing due to human operation failure is reduced, and the treatment cost is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a three -dimensional structure schematic diagram of automatic liquid supplementing device for blood purification.

[0017] Figure 2 The utility model provides a workbench top structure schematic drawing of automatic liquid supplementing device for blood purification.

[0018] Figure 3 The utility model provides a slide rod internal structure schematic drawing of automatic liquid supplementing device for blood purification.

[0019] Figure 4 The utility model provides a cylinder one side structure schematic drawing of automatic liquid supplementing device for blood purification.

[0020] Figure 5 The utility model provides a fixed cylinder internal structure schematic drawing of automatic liquid supplementing device for blood purification.

[0021] Figure 6 The utility model provides a tee structure schematic drawing of automatic liquid supplementing device for blood purification.

[0022] Figure 7 For Figure 3 The enlarged view of A in the middle.

[0023] Legend:

[0024] 1, workbench;2, cylinder;3, moving plate;4, sliding rod;5, piston;6, support;7, sleeve;8, fixed cylinder;9, tee;10, rotating shaft;11, connecting handle;12, drive rod;13, telescopic rod;14, spring one;15, sliding sleeve;16, connecting column;17, pull plate;18, slide rod;19, spring two;20, clamping block;21, limit block;22, clamping hole;23, inlet pipe;24, discharge pipe;25, limit ring. DETAILED DESCRIPTION

[0025] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] With reference to Figures 1-7 The utility model provides an embodiment: blood purification is with automatic liquid supplement device, including work table 1, the upper fixed connection of work table 1 has pneumatic cylinder 2, the output fixed connection of pneumatic cylinder 2 has moving plate 3, the one side fixed connection of moving plate 3 has sliding rod 4, the fixed connection of telescopic link 13 in sliding rod 4, the movable end fixed connection of telescopic link 13 has piston 5, piston 5 is arranged in sleeve 7, the spring one 14 of sleeve 7 is equipped with with piston 5 fixed connection, the other end of spring one 14 is with the inner wall fixed connection of sliding rod 4, the telescopic of pneumatic cylinder 2 is driven piston 5 in sleeve 7 through moving plate 3, sliding rod 4 and telescopic link 13 and moves, realizes the automatic liquid supplement of physiological saline.

[0027] The middle fixed connection of sleeve 7 has fixed cylinder 8, and the fixed cylinder 8 is fixedly installed on the work table 1 through the support 6, the upper part of the fixed cylinder 8 is connected with the physiological saline supply end through the feeding pipe 23, and the distal end of the sleeve 7 is connected with the water inlet of the blood purification equipment through the discharge pipe 24, a three-way pipe 9 is rotatably arranged in the fixed cylinder 8, both ends of the three-way pipe 9 are connected with the rotating shaft 10 penetrating through the fixed cylinder 8, the rotating shaft 10 is connected with a driving assembly, the driving assembly drives the three-way pipe 9 to rotate through the rotating shaft 10, so that the switching of the lumen of the sleeve 7, the feeding pipe 23 and the discharge pipe 24 is realized. In the initial state, one port of the three-way pipe 9 corresponds to the feeding pipe 23, another port in the same straight line is closed through the fixed cylinder 8, and the third port is communicated with the lumen of the sleeve 7, at this time, the physiological saline enters the sleeve 7, when the liquid needs to be supplemented, the driving assembly drives the three-way pipe 9 to rotate by 90 degrees, at this time, the two ports in the same straight line are respectively connected with the lumen of the sleeve 7 and the discharge pipe 24, and the third port is closed by the fixed cylinder 8, and the feeding pipe 23 is closed by the three-way pipe 9, the pneumatic cylinder 2 drives the piston 5 to move and pushes the physiological saline into the water inlet of the blood purification equipment.

[0028] In the embodiment, the driving assembly comprises a connecting handle 11, the connecting handle 11 is fixedly connected with the rotating shaft 10, the lower part of the connecting handle 11 is rotationally connected with a driving rod 12, and the other end of the driving rod 12 is rotationally connected on the moving plate 3; through the above design, an additional driving mechanism is not needed to drive the rotation of the tee pipe 9, the structure is simplified, and the equipment cost is reduced.

[0029] The automatic liquid supplementing device for blood purification also comprises a control module, the control module is used for receiving the pressure data before the blood pump and sending an instruction to start the cylinder when the pressure data reaches a set value, starting the liquid supplementing process and realizing intelligent control.

[0030] In order to realize accurate control of the supplementing amount, in the embodiment, a limiting assembly for limiting the movement of the piston 5 is arranged on the sleeve 7, the limiting assembly comprises a sliding sleeve 15 which is slidingly arranged on the outer wall of the sleeve 7, a connecting column 16 is fixedly connected to the side of the sliding sleeve 15 close to the sleeve 7, a through slot is formed in the connecting column 16, the wall of the sleeve 7 is inserted into the through slot, a limiting ring 25 is fixedly connected to the side of the sleeve 7 where the connecting column 16 is located, and the limiting ring 25 is slidingly connected to the inner wall of the sleeve 7. By moving the sliding sleeve 15, the limiting ring 25 is moved by the connecting column 16, so that the position of the piston 5 is limited by the limiting ring 25, and the amount of physiological saline entering the sleeve 7 is adjusted.

[0031] In the embodiment, a pull plate 17 is arranged on the outside of the sliding sleeve 15, a sliding rod 18 penetrating through the sliding sleeve 15 is connected to the pull plate 17, a clamping block 20 is connected to one end of the sliding rod 18 inside the sliding sleeve 15, a spring 19 is arranged between the clamping block 20 and the sliding sleeve 15 on the sliding rod 18, and a plurality of clamping holes 22 matched with the clamping block 20 are arranged on the outer wall of the sleeve 7 at intervals. When the position of the limiting ring 25 needs to be adjusted, the sliding rod 18 and the clamping block 20 are pulled to slide in the interior of the sleeve 7 and the sliding sleeve 15, the sliding sleeve 15 is pulled to slide on the outer wall of the sleeve 7 when the clamping block 20 completely separates from the clamping hole 22, the limiting ring 25 is slidingly driven on the inner wall of the sleeve 7 by the movement of the sliding sleeve 15 and the connecting column 16, the clamping block 20 is pushed into the clamping hole 22 on the sleeve 7 to be fixed by the rebound of the spring 19 when it is moved to the appropriate position, so that the limiting ring 25 is fixed in the interior of the sleeve 7, and the accurate control of the supplementing amount is ensured. The piston 5 is fixedly connected to the movable end of the telescopic rod 13, so that the interference caused by the asynchronization of the moving distance of the piston 5 and the moving distance of the cylinder 2 is avoided.

[0032] In the embodiment, a limiting block 21 is fixedly connected to the outer wall of the clamping block 20, the outer wall of the limiting block 21 is slidingly connected to the interior of the sliding sleeve 15, and the limiting block 21 is used for limiting the movement of the clamping block 20.

[0033] In the embodiment, the inlet pipe 23 is provided with a one-way valve to prevent the reverse flow of the physiological saline and ensure the unidirectionality and stability of the liquid supplementing process.

[0034] In the embodiment, the sleeve 7 is provided with a transparent window, and a scale line is arranged on one side of the transparent window.

[0035] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic fluid replenishment device for blood purification, characterized in that: The utility model provides a blood purification device, including workbench (1), the upper fixed connection of workbench (1) has the cylinder (2), the output of cylinder (2) fixedly connected with mobile board (3), one side fixed connection of mobile board (3) has the sliding rod (4), the fixed connection of sliding rod (4) in telescopic link (13), the movable end fixed connection of telescopic link (13) has piston (5), piston (5) is arranged in sleeve (7) slidingly, the spring one (14) of telescopic link (13) is set with and piston (5) fixed connection, the other end of spring one (14) is fixedly connected with the inner wall of sliding rod (4); The middle part of the sleeve (7) is fixedly connected with a fixed cylinder (8), the fixed cylinder (8) is fixedly installed on the workbench (1) through a support (6), and the upper part of the fixed cylinder (8) is connected with a physiological saline supply end through a feeding pipe (23). The distal end of the sleeve (7) is connected with a water inlet of a blood purification device through a discharge pipe (24). The fixed cylinder (8) is rotatably provided with a tee pipe (9), both ends of the tee pipe (9) are connected with a rotating shaft (10) penetrating through the fixed cylinder (8), and the rotating shaft (10) is connected with a driving assembly. The driving assembly drives the tee pipe (9) to rotate through the rotating shaft (10), so as to realize the switching of the communication between the inner cavity of the sleeve (7) and the feeding pipe (23) and the communication between the inner cavity of the sleeve (7) and the discharge pipe (24). The control module is used for receiving blood pump front pressure data and sending an instruction to start the cylinder when the pressure data reaches a set value.

2. The automatic liquid supplementing device for blood purification according to claim 1, characterized by: The driving assembly includes a connecting handle (11) fixedly connected with the rotating shaft (10), and a driving rod (12) rotatably connected to the lower part of the connecting handle (11) and rotatably connected to the other end of the driving rod (12) on the mobile board (3).

3. The automatic fluid supplementing device for blood purification according to claim 1, characterized by: The sleeve (7) is provided with a limiting assembly for limiting the movement of the piston (5). The limiting assembly includes a sliding sleeve (15) slidingly arranged on the outer wall of the sleeve (7), a connecting column (16) fixedly connected to the side of the sliding sleeve (15) close to the sleeve (7), a through groove formed in the connecting column (16), and a pipe wall of the sleeve (7) inserted into the through groove. The connecting column (16) is fixedly connected with a limiting ring (25) on one side of the sleeve (7), and the limiting ring (25) is slidingly connected to the inner wall of the sleeve (7).

4. The automatic fluid supplementing device for blood purification according to claim 3, characterized by: The outer side of the sliding sleeve (15) is provided with a pull plate (17), the pull plate (17) is connected with a sliding rod (18) penetrating through the sliding sleeve (15), one end of the sliding rod (18) on the inner side of the sliding sleeve (15) is connected with a clamping block (20), the sliding rod (18) is sleeved with a spring (19) between the clamping block (20) and the sliding sleeve (15), and a plurality of clamping holes (22) matched with the clamping block (20) are formed on the outer wall of the sleeve (7) at intervals.

5. The automatic fluid supplementing device for blood purification according to claim 4, characterized by: The outer wall of the card block (20) is fixedly connected with a limiting block (21), the outer wall of the limiting block (21) is slidably connected in the inner part of the sliding sleeve (15), and the limiting block (21) is used for limiting the movement of the card block (20).

6. The automatic fluid replacement device for blood purification according to claim 1, wherein: A one-way valve is arranged on the feeding pipe (23).

7. The automatic fluid replacement device for blood purification according to claim 1, characterized by: A transparent window is arranged on the sleeve (7), and a scale line is arranged on one side of the transparent window.

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