TWI860561B - Hemodialysis device - Google Patents

Abstract

A hemodialysis device includes a dialysis tube, a blood tube, a dialysate tube and a bidirectional controller. The blood tube is connected with the dialysis tube to guide blood into and out of the dialysis tube. The dialysate tube is connected with the dialysis tube to guide dialysate into and out of the dialysis tube for cleaning the blood. The bidirectional controller is disposed between the dialysis tube and the dialysate tube, and adapted to switch the dialysate tube into a dialysis mode or an exhausting mode. The exhausting mode is used to exhaust gaseous matter inside the dialysis tube.

Description

Hemodialysis device

The present invention provides a hemodialysis device, in particular a hemodialysis device providing an automatic drainage function.

Traditional dialysis machines use dialysis tubes as blood filtration equipment. The blood inlet, blood outlet, dialysate inlet, and dialysate outlet of the dialysis tube are connected to the patient and the dialysate supply device through corresponding connecting tubes. When the dialysis treatment is over, the residual liquid in the dialysis tube needs to be discharged. Reducing the overall weight can reduce the cost of medical waste disposal. Traditional dialysis machines remove the connecting tube at the dialysate inlet to allow air to enter the dialysis tube from the dialysate inlet, and then start the pump to discharge the residual liquid in the dialysis tube. However, after the connecting tube is removed from the dialysate inlet of the dialysis tube, the residual liquid often flows out from the dialysate inlet, requiring additional cleaning and causing inconvenience in use.

The present invention provides a hemodialysis device with automatic drainage function to solve the above-mentioned problems.

The scope of the patent application of the present invention discloses a hemodialysis device, which includes a dialyzer, a blood conduit, a fluid conduit and a two-way controller. The blood conduit is connected to the dialyzer to input and output blood into and out of the dialyzer. The fluid conduit is connected to the dialyzer to input and output dialysate into and out of the dialyzer to filter the blood. The two-way controller is arranged between the dialyzer and the fluid conduit, and is used to switch the dialyzer to a dialysis mode or a venting mode, and the venting mode is used to empty the dialyzer.

The present invention uses a bidirectional controller to switch the dialysis mode and exhaust mode of the hemodialysis device; the hemodialysis device can use the control circuit to read whether the dialyzer is performing a dialysis treatment, and automatically and instantly switch the bidirectional controller to the dialysis mode or exhaust mode to provide clean dialysate to enter the dialyzer or provide air to exhaust the residual dialysate from the dialyzer in accordance with the current mode of the dialysis treatment. Compared with the prior art, the hemodialysis device of the present invention can automatically perform the dialysate removal process without manually removing the dialysate inlet tube, which can avoid the dialysate flowing out of the interface of the dialysate inlet tube and causing additional cleaning burden.

10:Hemodialysis device

12: Dialysis fluid supply device

14: Display screen

16: Dialyzer

161: Fluid input port

162: Fluid output port

163: Blood inlet port

164: Blood output port

18: Blood catheter for infusion

20: Blood catheter for blood transfusion

22: Fluid input conduit

24: Fluid conduit for output

26: Bidirectional controller

261: Dialysate end

262: Air terminal

28:Filter

30: Control circuit

32: Waterproof layer

Figure 1 is a schematic diagram of the application of the hemodialysis device of the embodiment of the present invention.

Figure 2 is a functional diagram of the hemodialysis device of an embodiment of the present invention.

Please refer to Figure 1 and Figure 2. Figure 1 is an application diagram of the hemodialysis device 10 of the embodiment of the present invention, and Figure 2 is a functional diagram of the hemodialysis device 10 of the embodiment of the present invention. The hemodialysis device 10 can be configured with a dialysate supply device 12 and a display screen 14. The dialysate supply device 12 stores dialysate and can optionally have other physiological detection equipment. The display screen 14 is electrically connected to the dialysate supply device 12 and provides an operating interface for the user to input control instructions. The dialysate supply device 12 can provide or stop supplying dialysate to the hemodialysis device 10 according to the control instruction.

The hemodialysis device 10 may include a dialyzer 16, an inlet blood conduit 18, an outlet blood conduit 20, an inlet fluid conduit 22, an outlet fluid conduit 24, a two-way controller 26, and a filter 28. The dialyzer 16 may have a fluid inlet port 161, a fluid outlet port 162, a blood inlet port 163, and a blood outlet port 164. The inlet blood conduit 18 is connected to the dialyzer 16 via the blood inlet port 163, and the outlet blood conduit 20 is connected to the dialyzer 16 via the blood outlet port 164. The inlet fluid conduit 22 is connected to the dialyzer 16 via the fluid inlet port 161, and the outlet fluid conduit 24 is connected to the dialyzer 16 via the fluid outlet port 162. The blood inlet tube 18 and the fluid inlet tube 22 respectively introduce blood and dialysate into the dialyzer 16. The purified blood is discharged from the dialyzer 16 through the blood outlet tube 20, and the waste dialysate after dialysis is discharged from the dialyzer 16 through the fluid outlet tube 24.

The two-way controller 26 may be an electromagnetic valve connected to the dialyzer 16 and the input fluid conduit 22. The hemodialysis device 10 may further include a control circuit 30, which is electrically connected to the two-way controller 26 to read whether the dialyzer 16 is in the execution mode or the shutdown mode, thereby determining whether to switch the two-way controller 26 to the dialysis mode or the exhaust mode. The two-way controller 26 may have a dialysate end 261 and an air end 262, which are respectively connected to the input fluid conduit 22 and the filter 28. The filter 28 can filter the air entering the two-way controller 26 to maintain the dialyzer 16 in a sterile state or a low-bacteria state. Generally speaking, the filter 28 may have a waterproof layer 32 to prevent the dialysate from flowing out of the air end 262 of the two-way controller 26, but the actual application is not limited to this.

When the dialyzer 16 is in the execution mode for the dialysis treatment, the two-way controller 26 guides the dialysate to enter the dialyzer 16 through the input fluid conduit 22 and then leave the dialyzer 16 through the output fluid conduit 24; blood enters the dialyzer 16 through the input blood conduit 18, and the dialysate is used to filter toxins in the blood, and the purified blood then flows back to the human body through the output blood conduit 20; at this time, the two-way controller 26 is in the dialysis mode (non-conduction mode), the dialysate end 261 is opened and the air end 262 is closed. When the dialyzer 16 is in the off mode, the dialysate and blood no longer enter the dialyzer 16. At this time, the bidirectional controller 26 is in the exhaust mode (on mode), closing the dialysate end 261 and opening the air end 262 to guide air into the dialyzer 16 to discharge the remaining dialysate in the dialyzer 16 to empty the dialyzer 16.

The non-conduction mode of the bidirectional controller 26 is to continue the dialysis treatment when no control command is received, and the dialysate end 261 is always open and the air end 262 is always closed. If the dialysis treatment is to be closed, the bidirectional controller 26 must receive a control command to be in the conduction mode, and then close the dialysate end 261 and open the air end 262. In this way, the hemodialysis device 10 of the present invention can prevent the bidirectional controller 26 from unexpectedly switching from the dialysis mode to the exhaust mode in the event of an unexpected power outage, thereby preventing the user from being injured.

In other words, the bidirectional controller 26 can be disposed between the input fluid conduit 22 and the fluid input end 161 of the dialyzer 16, and the electromagnetic valve can automatically control the order in which the dialysate and the air alternately enter the dialyzer 16. The bidirectional controller 26 can provide an operating switch, allowing the user to manually operate to freely choose to switch to the dialysis mode or the exhaust mode. Alternatively, the hemodialysis device 10 can also use the control circuit 30 to read the current mode of the dialysis treatment of the dialyzer 16, and then determine how to switch the bidirectional controller 26 to the dialysis mode or the exhaust mode according to the current mode of the dialysis treatment. For example, if the control circuit 30 determines that the dialysis treatment is switched from the execution mode to the shutdown mode, the output command outputted by the control circuit 30 will control the bidirectional controller 26 to automatically switch to the exhaust mode, connect the air terminal 262 and close the dialysate terminal 261, and guide the air to flow into the dialyzer 16 to discharge the dialysate; if the control circuit 30 determines that the dialysis treatment is switched from the shutdown mode to the execution mode, the output command outputted by the control circuit 30 will control the bidirectional controller 26 to automatically switch to the dialysis mode, connect the dialysate terminal 261 and close the air terminal 262 to prevent air from entering.

In summary, the present invention uses a bidirectional controller to switch the dialysis mode and exhaust mode of the hemodialysis device; the hemodialysis device can use the control circuit to read whether the dialyzer is performing a dialysis treatment, and automatically and instantly switch the bidirectional controller to the dialysis mode or exhaust mode to provide clean dialysate to enter the dialyzer or provide air to exhaust the residual dialysate from the dialyzer in accordance with the current mode of the dialysis treatment. Compared with the prior art, the hemodialysis device of the present invention can automatically perform the dialysate removal process without manually removing the dialysate inlet tube, which can avoid the dialysate flowing out of the interface of the dialysate inlet tube and causing additional cleaning burden.

The above is only the preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

10:Hemodialysis device

16: Dialyzer

161: Fluid input port

162: Fluid output port

163: Blood inlet port

164: Blood output port

18: Blood catheter for infusion

20: Blood catheter for blood transfusion

22: Fluid input conduit

24: Fluid conduit for output

26: Bidirectional controller

261: Dialysate end

262: Air terminal

28:Filter

30: Control circuit

32: Waterproof layer

Claims (10)

A hemodialysis device comprises: a dialyzer; a blood conduit connected to the dialyzer to input and output blood into and out of the dialyzer; a fluid conduit connected to the dialyzer to input and output dialysate into and out of the dialyzer to filter the blood; and a two-way controller connected to the dialyzer and the fluid conduit to switch to a dialysis mode or a gas exhaust mode, wherein the gas exhaust mode is used to empty the dialyzer. The two-way controller is an electromagnetic valve, which is used to analyze an output instruction to automatically switch to the dialysis mode or the gas exhaust mode. A hemodialysis device as described in claim 1, wherein the bidirectional controller guides the dialysate through the fluid conduit to enter and leave the dialyzer in the dialysis mode, and the bidirectional controller guides air through the fluid conduit to enter the dialyzer in the exhaust mode to exhaust the remaining dialysate. A hemodialysis device as described in claim 1, wherein the bidirectional controller has a dialysate end and an air end, and the bidirectional controller opens the dialysate end or the air end according to whether a dialysis treatment of the dialyzer is being performed. A hemodialysis device as described in claim 1, wherein the hemodialysis device further comprises a control circuit electrically connected to the solenoid valve for reading whether a dialysis treatment of the dialyzer is in an execution mode or a shutdown mode to provide the output instruction. A hemodialysis device as described in claim 1, wherein the dialyzer has a fluid input end, and the bidirectional controller connects the fluid conduit and the fluid input end of the dialyzer. A hemodialysis device as described in claim 4, wherein when the dialysis treatment is switched from the execution mode to the shutdown mode, the exhaust mode is to close one of the dialysate ends of the two-way controller and open one of the air ends of the two-way controller. A hemodialysis device as described in claim 6, wherein when the dialysis treatment is switched from the closed mode to the running mode, the dialysis mode closes the air end and opens the dialysate end. A hemodialysis device as described in claim 1, wherein a non-conduction mode of the bidirectional controller opens a dialysate end of the bidirectional controller and closes an air end of the bidirectional controller, and a conduction mode of the bidirectional controller closes the dialysate end and opens the air end. The hemodialysis device as described in claim 1 further comprises: a filter, disposed at an air end of the two-way controller, for filtering the air entering the two-way controller to maintain a sterile state or a low-bacteria state of the dialyzer. A hemodialysis device as described in claim 9, wherein the filter has a waterproof layer to prevent the dialysate from flowing out of the air end.

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