Transfusion control method and system with power acting on soft medicinal-liquid bag

Abstract

The invention discloses a transfusion control method and system with power acting on a soft medicinal-liquid bag. The transfusion control method includes the following steps that when a first liquid unit is subjected to pressing force and deforms, the first liquid unit makes liquid injected into a second liquid unit through a capillary tube at a constant flow rate, and meanwhile, the pressed and deformed second liquid unit presses the soft medicinal-liquid bag to output medicinal liquid with the same volume for transfusion at the same flow rate. Compared with the prior art, 1, the soft medicinal-liquid bag is placed in equipment, power directly acts on the soft medicinal-liquid bag, and the defects that in an existing transfusion process, infusion bottles or soft bags need to be hung for transfusion and movement is inconvenient are avoided; 2, the speed of liquid flowing out of the soft bag is accurately, continually and stably controlled, the situation that the accuracy of an existingtransfusion pump depends on the geometric dimension, extrusion resistance and fatigue resistance of a transfusion tube is avoided; 3, through the cooperation of the matched transfusion tube, the system has the automatic liquid stop function and avoids gravitational flow caused by the gravity; 4, through the cooperation of the matched tube, the system has the automatic exhaust function and prevents air from entering the patient's body.

Description

technical field [0001] The invention relates to the technical field of medical infusion control, in particular to an infusion control method and a control system in which power acts on a medical liquid soft bag. Background technique [0002] In the prior art, there are mainly the following methods for power infusion: [0003] 1. The infusion pump is used to periodically squeeze the infusion line through the pump body to achieve pressurized infusion. It is a volume-controlled infusion method, and the infusion flow rate can be adjusted within a relatively wide range (about 1 to 1500ml / h). However, the infusion accuracy of this infusion method is closely related to the geometric size of the pipeline, pipeline elasticity, extrusion resistance and working time of the pipeline, and the infusion bottle or soft drug bag needs to be hoisted during work, which is not easy to move; [0004] 2. The roller pump is used, which realizes pressurized infusion by rolling the infusion pipelin...

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Problems solved by technology

[0005] 3. The pressure plate pump is used to provide infusion power by squeezing the soft bag of liquid medicine through the pressure plate with elastic parts. Its advantage is that the principle is simple and no electricity is needed; the disadvantage is that the infusion pressure is not constant, there is power but no control, and the infusion accuracy and speed Can not guarantee;

[0006] 4. The infusion bag is used to inflate the pressurized bag manually, and the air bag squeezes the soft bag of liquid medicine to realize pressurized infusion. The cost is very low, but the pressure is unstable, there is power but no control, and the infusion accuracy and speed There is no guarantee; in addition, on the basis of this scheme, it is easy to think of adopting the technical scheme of automatic inflating and pressurizing, the pressure can be stably controlled, but it is still powered but not controlled, and the accuracy and speed of infusion cannot be effectively guaranteed

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