Blood dialyzing system and method for exchanging heat of waste liquid and reverse osmosis water

Abstract

A blood dialyzing system comprises a balancing device, a heating and liquid-dispensing device, a dialyzer, a heat exchanging device, an ultrafiltration pump, a plurality of pipes, and a delivery pump installed on the pipes, wherein the balancing device is communicated with the dialyzer and the heating and liquid-dispensing device through the pipes; the heating and liquid-dispensing device is communicated with the heat exchanging device through the pipes; waste liquid flowing through the balancing device is drained out from the blood dialyzing system through the pipes; a waste liquid inlet of the heat exchanging device is communicated with a waste liquid outlet of the dialyzer through the pipes; a waste liquid outlet of the heat exchanging device is communicated with a waste liquid inlet of the balancing device through the pipes; and the ultrafiltration pump is connected between the waste liquid outlet of the dialyzer and the waste liquid inlet of the heat exchanging device through a tee interface, or between the waste liquid outlet of the heat exchanging device and the waste liquid inlet of the balancing device. The blood dialyzing system has the advantages of high heat exchanging rate, safety, energy conservation, high reliability, good dialyzing therapeutic effect and the like.

Description

technical field [0001] The invention relates to hemodialysis technology, in particular to a hemodialysis system in a hemodialysis and blood purification instrument and a heat exchange method between waste liquid and reverse osmosis water. Background technique [0002] Hemodialysis is to use the principle that the solute flows from the side with high concentration to the side with low concentration, and introduce the two solutions of blood and dialysate into the dialyzer with hollow fiber semi-permeable membrane at the same time, so that the blood is located in the hollow fiber semi-permeable membrane. The dialysate is located on the other side of the hollow fiber semi-permeable membrane, so that the solutions on both sides of the membrane can remove medium and small molecule toxins in the human blood through diffusion and osmosis. At the same time, the electrolytes in the blood can also pass through Osmosis reaches balance, so as to achieve the purpose of blood purification....

AI Technical Summary

Problems solved by technology

[0010] 1. In the prior art, there are great defects in the treatment method of heat exchange between reverse osmosis water and waste liquid. The heat exchange rate is low, which leads to unsatisfactory dialysis treatment effect and may even cause medical accidents; After the osmotic pump, balance device, blood leakage detector and other components and the pipes connected to them, they exchange heat with the reverse osmosis water before they are about to be discharged from the machine or discharged into the sewer. Dissipation, which directly leads to the temperature drop of the waste liquid, and the heat exchange is very insufficient, which cannot effectively increase the temperature of the reverse osmosis water

Especially in winter, the temperature of the reverse osmosis water drops due to the low temperature. When the temperature of the reverse osmosis water is around 5°C-6°C, the water temperature cannot achieve the effect of preheating due to insufficient heat exchange, resulting in the failure of the instrument. The temperature of the dialysate is unstable, which affects the normal treatment work. In addition, the low temperature of the clinical dialysate will cause the patient to shiver. The highest safety index of the equipment is that the ion concentration in the dialysate must meet the needs of the human body, and the temperature will directly affect the ion concentration. If the external temperature drops, especially in the cold winter, the temperature of the reverse osmosis water will be reduced to 5°C When it is around -6°C, the temperature of the dialysate will fluctuate greatly, resulting in a very large change in the ion concentration in the dialysate, which can easily lead to medical accidents

[0011] 2. The operation is relatively difficult, especially for the separate waste liquid storage device. If the operation is slightly improper, it will easily lead to medical accidents, and the difficulty of machine maintenance is also relatively high, resulting in relatively high maintenance costs; the existing heat exchange device and The waste liquid storage device is two independent parts, and there is waste liquid flowing in the two parts, which increases the corresponding difficulty for instrument disinfection and operation, especially the separate waste liquid storage device is not easy to operate, only the waste liquid storage Only when the liquid in the device is filled and the exhaust is completely exhausted can it be ensured that no air or air-water mixture enters the balance chamber, otherwise, the balance chamber will not be able to achieve balance, and dehydration will be inaccurate or reversed, resulting in edema of the patient. Cause medical accidents; In addition, since the heat exchange device and the waste liquid storage device are two parts, their volume will be correspondingly larger, and the space occupied by the instrument is relatively large, which increases the difficulty of maintenance and maintenance costs

[0012] 3. The service life of the machine is relatively short; the heat in the waste liquid of the prior art that is not exchanged to the reverse osmosis water is almost completely dissipated inside the machine. If the machine runs like this for a long time, its temperature will rise and its service life will be shortened.

[0013] 4. Failure to make full use of the waste heat in the waste liquid to increase the temperature of the reverse osmosis water. The temperature of the reverse osmosis water is mainly increased by heating with high-power heating rods, and the energy consumption is relatively large

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