A central liquid supply system for hemodialysis

Abstract

The invention provides a central liquid feeding system used for hematodialysis. The central feeding system comprises a liquid preparation device, a sterilization device and a liquid supply pipeline for connecting the liquid preparation device and a dialysis chamber, wherein the sterilization device comprises a heater; and a loop is formed through the input port and the output port of the heater, and the liquid preparation device or the liquid supply pipeline or the liquid preparation device and the liquid supply pipeline through a sterilization pipeline. As the loop can be formed between the liquid preparation device and the heater, and the loop can also be formed between the liquid supply pipeline and the heater, or the loop can be formed between the liquid preparation device, the liquid supply pipeline and the heater, the sterilization condition can be selected according to demands; and moreover reverse osmosis water is circulated, flowed and heated in the loop, and the sterilization temperature can be very high and is uniformly distributed in the whole loop, so that the sterilization is thorough and convenient.

Description

technical field [0001] The invention relates to a medical device, in particular to a central fluid supply system for hemodialysis. Background technique [0002] Hemodialysis is a therapeutic technique for establishing an extracorporeal blood circulation circuit and performing blood purification for patients with renal insufficiency or drug poisoning. The hemodialyzer in the dialysis room performs solute dispersion, osmosis and ultrafiltration with the patient's blood, and the purified blood returns to the patient's body, while the dialyzed liquid is discharged from the liquid supply system as waste liquid, and so on. , to complete the entire dialysis process. [0003] In hemodialysis treatment, the dialysate contains 30-38mmol / l bicarbonate, which is composed of A concentrated solution, B concentrated solution and dialysis water mixed in a certain proportion, wherein the A concentrated solution is an acidic solution, and the B concentrated solution is sodium bicarbonate so...

AI Technical Summary

Problems solved by technology

Although the liquid supply system uses physical high-temperature disinfection for disinfection to avoid the residue of chemical disinfectants in chemical disinfection methods, it still has the following defects: using a constant temperature water supply device to directly heat the reverse osmosis water, slow start-up speed, and heating time long, and the waste of water resources is serious; only the B liquid dispensing device and related pipelines in the B liquid supply system are disinfected, but the liquid supply pipeline connecting the B liquid dispensing device and the dialysis room is not disinfected, that is, there is disinfection Dead corner, and this section is the pipeline where bacteria are most likely to grow; the pipeline and the B solution are soaked and disinfected by filling them with hot water. As the disinfection time goes by, the temperature of the reverse osmosis water will drop, and complete disinfection cannot be achieved effect; finally, the waste liquid after cooling is discharged into the cleaning tank, which cannot be disinfected and affects the disinfection effect of the entire system; since the constant temperature water supply device provides 50-83 °C reverse osmosis water to the liquid distribution device, its own temperature The conditions for complete disinfection cannot be achieved. In addition, the drop in temperature also leads to a greatly reduced disinfection effect

Images